JP2019167083A - Airbag device - Google Patents

Abstract

An airbag device capable of efficiently suppressing an injury value of an occupant in an emergency. A cushion of an airbag device is provided on an inner inflatable portion that protrudes rearward of a vehicle and restrains a head 146 of an occupant 144 from the front of the vehicle, and a side of the inner inflatable portion 158 in a vehicle width direction. Protruding portions 124 and 126 protruding more rearward of the vehicle than the inner inflatable portion 158 and being provided between the inner inflatable portion 158 and the protruding portions 124 and 126 to provide the inner inflatable portion 158 and the protruding portion 124. Outer inflatable portions 160 and 162 which temporarily inflate rearward of the vehicle in a range smaller than 126. When the outer inflatable portions 160 and 162 are crushed by the inner inflatable portion 158 and the protruding portions 124 and 126, the protruding portions 124 and 126 are brought into a posture drawn toward the inner inflatable portion 158. [Selection diagram] FIG.

Description

  The present invention relates to an airbag apparatus including a bag-like cushion that is installed in a vehicle and inflates and deploys in front of a seat.

  In recent years, airbag devices are almost standard equipment. The airbag device is a safety device that operates in an emergency such as a vehicle collision, and receives and protects an occupant using an airbag cushion that is inflated and deployed by gas pressure. There are various types of airbag devices depending on the installation location and application. For example, a front airbag is installed in the center of the steering wheel in the driver's seat to protect the front seat occupant mainly from front-rear impacts, and the instrument panel and its surrounding areas are located near the passenger seat. A passenger airbag is provided. In addition, a curtain airbag that inflates and deploys along the side window is installed near the ceiling of the wall to protect each occupant in the front and rear row from side collision and subsequent rollover (rollover). A side airbag that inflates and deploys to the side of the occupant is provided on the side of the vehicle.

  The airbag cushion of various airbag devices may be made in a shape corresponding to a body part so that an occupant can efficiently restrain the airbag cushion. For example, the airbag body 11 shown in FIG. 1 of Patent Document 1 is provided with a first extension portion 14a and a second extension portion 14b that protect the head of the occupant. According to the configuration of Patent Document 1, it is stated that the first extending portion 14a and the like can cover and protect the side of the head.

JP 2013-14176 A

  Current airbags are also required to cope with irregular collisions and impacts such as so-called oblique collisions in which impacts are applied to the vehicle from diagonally forward and backward directions. An occupant at the time of an oblique collision enters the airbag cushion existing in front of the seat at an irregular angle such as an oblique direction. In that case, when the head of the occupant contacts the airbag cushion in front of the seat, the head may rotate around the neck as viewed from above. Such rotation of the head tends to increase the injury value of the occupant in view of the structure of the human body, and there is a demand for efficiently preventing this.

  In Patent Document 1 described above, the first extension portion 14a and the second extension portion 14b are used to protect the head even when the head of the occupant is displaced in the vehicle width direction when an impact is applied to the vehicle. It is stated that it can be done. However, as long as FIG. 5 and the like are referred to, the first extending portion 14a and the like are not so thick in the vehicle width direction, and therefore there is a possibility that the shape cannot be maintained when restraining the occupant's head in an oblique collision.

  In view of such a problem, an object of the present invention is to provide an airbag device that can efficiently suppress an injury value of an occupant in an emergency.

  In order to solve the above-described problems, a representative configuration of an airbag apparatus according to the present invention is an airbag apparatus including a bag-shaped cushion that is installed in a vehicle and inflates and deploys in front of a seat. An inner inflatable portion that protrudes rearward and restrains the head of the occupant from the front of the vehicle, and at least one that is provided on the side of the inner inflatable portion in the vehicle width direction and that protrudes rearward from the inner inflatable portion and can be inflated And at least one outer inflating portion that is provided between the inner inflating portion and the projecting portion, and temporarily inflates convexly toward the rear of the vehicle in a range smaller than the inner inflating portion and the projecting portion. The outer expanding portion is crushed by the inner expanding portion and the protruding portion, and the protruding portion is pulled toward the inner expanding portion side.

  According to the said structure, the force which goes to an inner side expansion part side is applied to a protrusion part, and the restraint force of the passenger | crew's temporal region by a protrusion part improves. Therefore, for example, since the rotation of the head of the occupant can be absorbed by the protrusion, the injury value of the occupant can be efficiently suppressed.

  In order to solve the above problems, another representative configuration of the airbag apparatus according to the present invention is an airbag apparatus including a bag-shaped cushion that is installed in a vehicle and inflates and deploys in front of a seat, An inner inflatable portion that protrudes rearward of the vehicle and restrains the head of the occupant from the front of the vehicle, and at least one projecting portion that is provided on the side of the inner inflatable portion in the vehicle width direction and that protrudes rearward of the vehicle And at least one outer inflating portion provided between the inner inflating portion and the projecting portion and inflating convexly toward the rear of the vehicle in a range smaller than the inner inflating portion and the projecting portion.

  Even if the outer inflating portion is not crushed by the inner inflating portion and the projecting portion as in the above configuration, the projecting portion can absorb the rotation of the head of the occupant and efficiently suppress the injury value of the occupant. Since the outer inflating portion is convexly inflated to the rear of the vehicle in a range smaller than the inner inflating portion and the protruding portion, the effect that the occupant comes into contact with the inner inflating portion and the protruding portion is pulled toward the inner inflating portion side is obtained Because it is.

  The above-described effect can be obtained even if at least one projecting portion can be inflated by projecting to the rear of the vehicle relative to the inner inflatable portion, or can be inflated by projecting to the rear of the vehicle to the same extent as the inner inflatable portion. It is. In addition, the above-described effect is more prominently obtained when at least one outer expansion portion expands convexly toward the rear of the vehicle in a smaller range in the vehicle width direction than the inner expansion portion and the protruding portion.

  The radius of curvature of the outer inflatable portion when expanded is preferably smaller than the radius of curvature of the inner inflatable portion and the protruding portion. According to this configuration, the rigidity of the outer expanding portion is lower than the rigidity of the inner expanding portion and the protruding portion. Therefore, the outer inflating portion is crushed between the inner inflating portion and the projecting portion, and a force toward the inner inflating portion can be efficiently applied to the projecting portion.

  Said protrusion part may be provided in the both sides of the vehicle width direction of a front restraint part. According to this configuration, it is possible to absorb the occupant's head on either side in the vehicle width direction.

  The airbag device further includes at least one inner tether that has one end connected to a boundary portion between the inner inflatable portion and the outer inflatable portion inside the cushion and is tensioned to pull the portion forward of the vehicle. There may be provided at least one outer tether connected to a boundary portion between the outer expanding portion and the projecting portion and tensioned to pull the portion forward of the vehicle.

  By providing the inner tether and the outer tether, it is possible to efficiently inflate the inner inflatable portion and the outer inflatable portion toward the rear of the vehicle.

  The outer expanding portion may be provided on both sides of the inner expanding portion in the vehicle width direction, and one inner tether and one outer tether may be provided on each of the left and right sides in the vehicle width direction. With this configuration, it is possible to suitably form the outer expansion portion on either side in the vehicle width direction.

  At least one of the one end of the outer tether and the one end of the inner tether may have a vertical dimension that extends over the vertical range in the protrusion. With this configuration, the outer inflating portion can be formed over the upper and lower ranges of the projecting portion, so that it is possible to efficiently generate a force toward the inner inflating portion side in the projecting portion.

  The other end of the outer tether and the inner tether may be connected to a portion of the interior of the cushion that faces the front restraint portion. With this configuration, the front restraint portion can be efficiently pulled by the inner tether and the outer tether, and the outer expansion portion can be suitably formed.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the airbag apparatus which can suppress a passenger | crew's injury value efficiently in an emergency.

It is a figure which illustrates the outline | summary of the airbag apparatus concerning embodiment of this invention. It is the figure which illustrated the cushion at the time of the expansion | deployment of FIG.1 (b) from each direction. It is sectional drawing of the cushion of FIG.2 (b). It is the figure which illustrated the process in which the cushion of Drawing 3 (a) restrains a crew member. It is the figure which illustrated the process in which the cushion of Drawing 3 (a) restrains a crew member. It is the figure which expanded the outer side expansion part and inner side expansion part vicinity of Fig.3 (a). It is the figure which illustrated the modification of cushions, such as Drawing 3 (a). It is the figure which illustrated the modification of cushions, such as Drawing 3 (a).

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a diagram illustrating an outline of an airbag apparatus 100 according to an embodiment of the present invention. FIG. 1A is a diagram illustrating a vehicle before the airbag apparatus 100 is operated. In FIG. 1 (a) and other drawings, the vehicle front-rear direction is indicated by arrows F (Forward) and B (Back), the vehicle width direction is indicated by arrows L (Left) and R (Right), and the vehicle vertical direction is indicated by arrows. Examples are U (up) and D (down).

  In the present embodiment, the airbag device 100 is implemented as a passenger bag for a passenger seat (seat 104 on the right side of the front row) in a left-hand drive vehicle. In the following, the description will be made on the assumption that the seat 104 on the right side of the front row is assumed. For example, the vehicle outer side in the vehicle width direction means the right side of the vehicle, and the vehicle inner side in the vehicle width direction means the left side of the vehicle.

  An airbag cushion (hereinafter referred to as cushion 108 (see FIG. 1B)) of the airbag apparatus 100 is accommodated in an accommodating portion 106 provided in the instrument panel 102. The accommodating part 106 is installed in the front of the vehicle of the seat 104, and accommodates the inflator 118 (refer FIG. 3A) which is a gas generator other than the cushion 108. FIG.

  FIG. 1B is a diagram illustrating the vehicle after the operation of the airbag device 100 of FIG. The cushion 108 is normally accommodated in the accommodating portion 106 (see FIG. 1A), and is inflated and deployed in front of the seat 104. The cushion 108 has a bag shape, and is formed by overlapping or sewing a plurality of base fabrics constituting the surface thereof, spinning using OPW (One-Piece Woven), or the like.

  FIG. 2 is a view illustrating the cushion 108 in FIG. 1B when inflated and deployed from each direction. FIG. 2A is a perspective view illustrating the cushion 108 of FIG. 1B as viewed from the lower left side behind the vehicle. The cushion 108 of the present embodiment is roughly divided into a base portion 122 and two projecting portions 124 and 126 provided on the vehicle rear side of the base portion 122.

  The base 122 is a part that occupies most of the cushion 108. A portion of the base 122 on the vehicle rear side is a front restraint portion 128 that restrains the head 146 of the occupant 144 (see FIG. 5B) from the front of the vehicle. The projecting portions 124 and 126 are provided on both sides of the front restraint portion 128 in the vehicle width direction and project to the rear of the vehicle from the front restraint portion 128 and inflate, mainly restraining the side head portion 148 of the occupant 144. .

  FIG. 2B is a view illustrating the cushion 108 of FIG. 1B as viewed from the inside of the vehicle. The base portion 122 is inflated and deployed rearward of the vehicle so as to fill the space between the upper surface of the instrument panel 102 and the windshield 120 from the housing portion 106 (see FIG. 1A). The protrusions 124 and 126 are provided slightly above the vehicle rear side of the base 122 and protrude from the base 122 in a shape close to a rectangle.

  FIG. 3 is a cross-sectional view of the cushion 108 of FIG. Fig.3 (a) is AA sectional drawing of the cushion 108 of FIG.2 (b). A part of the inflator 118 is inserted into the cushion 108. The inflator 118 operates due to an impact detection signal sent from a sensor (not shown) and supplies gas to the cushion 108. The cushion 108 starts to expand by the gas from the inflator 118, and the expansion pressure causes the cover 107 (see FIG. 1 (a)) of the housing portion 106 to be inflated and deployed toward the seat 104 to cause the occupant to move forward. Restrain from.

  The inflator 118 is of a disc type (disc type), and a part thereof is inserted into the base portion 122 and fixed to a rigid body portion of the vehicle such as a cross beam inside the housing portion 106 (see FIG. 1A). Has been. Inflators that are in widespread use are filled with a gas generating agent and burned to generate gas, filled with compressed gas and supplied with gas without generating heat, or burned There are hybrid types that use both gas and compressed gas. Any type of inflator 118 can be used.

  Two types of tethers of inner tethers 130 and 132 and outer tethers 134 and 136 are provided inside the cushion 108 of the present embodiment. The inner tethers 130, 132 and the outer tethers 134, 136 are both connected to the front restraint portion 128 inside the cushion 108, and are tensioned as the cushion 108 inflates and expands to pull the front restraint portion 128 forward of the vehicle. As a result, an inner inflating portion 158 and outer inflating portions 160 and 162 described later are formed in the front restraint portion 128.

  The outer tethers 134 and 136 are connected to portions of the front restraint portion 128 closer to the protrusions 124 and 126 than the center in the vehicle width direction, respectively. The inner tethers 130 and 132 are connected to a portion of the front restraint portion 128 that is a predetermined distance away from the outer tethers 134 and 136 toward the center in the vehicle width direction. The inner tethers 130 and 132 and the outer tethers 134 and 136 can be provided using the same material as the base fabric forming the cushion 108.

  FIG. 3B is a BB cross-sectional view of the cushion 108 of FIG. FIG. 3B illustrates the inner tether 130 as a representative of the inner tethers 130 and 132. Since the inner tethers 130 and 132 have the same configuration, the inner tether 130 is referred to as a representative.

  The inner tether 130 is provided in a shape that gradually expands from the vehicle front side toward the rear side, and one end 138 is joined to the front restraint portion 128. The other end 139 of the inner tether 130 is a portion facing the front restraint portion 128 in the inside of the cushion 108, and in particular, on the bottom portion on the vehicle front side that contacts the instrument panel 102 (see FIG. 1A). It is connected. With this configuration, the inner tether 130 can efficiently pull the front restraint portion 128 toward the front side of the vehicle as the cushion 108 expands and deploys.

  FIG.3 (c) is CC sectional drawing of the cushion 108 of Fig.3 (a). FIG. 3C illustrates the outer tether 134 as a representative of the outer tethers 134 and 136. Since the outer tethers 134 and 136 have the same configuration, the outer tether 134 is typically referred to.

  As illustrated in FIG. 3C, the outer tether 134 is also provided in a shape that slightly expands from the vehicle front side toward the rear side, and one end 140 is an end of the front restraint portion 128 in the vehicle width direction. Thus, the projection 124 is connected near the root 142. The other end 141 of the outer tether 134 is a portion facing the front restraint portion 128 in the inside of the cushion 108, similarly to the inner tether 130 (see FIG. 3B), and the instrument panel 102 (FIG. It is connected to the bottom part of the vehicle front side that contacts a). With this configuration, the outer tether 134 can efficiently pull the front restraint portion 128 toward the front side of the vehicle as the cushion 108 expands and deploys.

  As illustrated in FIG. 3A, the front restraint portion 128 is formed with the inner inflatable portion 158 and the outer inflatable portions 160 and 162 by the inner tethers 130 and 132 and the outer tethers 134 and 136. The inner inflatable portion 158 is inflated so as to protrude in a convex manner toward the occupant side on the center side in the vehicle width direction from the inner tethers 130 and 132 in the front restraint portion 128. The outer inflating portions 160 and 162 temporarily inflate between the outer tethers 134 and 136 and the inner tethers 130 and 132 in the front restraint portion 128 so as to protrude in a convex manner toward the passenger.

  In the present embodiment, the inner inflatable portion 158 and the outer inflatable portion 160 are used to generate a force in the projecting portion 124 toward the inner inflatable portion 158, thereby further improving the occupant restraining force of the projecting portions 124 and 126. be able to. Hereinafter, the process in which the cushion 108 restrains the occupant 144 will be described with reference to FIGS.

  4 and 5 are views illustrating a process in which the cushion 108 in FIG. As illustrated in FIG. 4A, the cushion 108 is accommodated in the front of the vehicle of the occupant 144 seated on the seat 104. When an impact occurs on the vehicle as illustrated in FIG. 4B, an operation signal is transmitted from a sensor (not shown) to the airbag device 100, and the cushion 108 tears the cover 107 (see FIG. 1A). Inflates and expands. Then, as illustrated in FIG. 4C, the cushion 108 expands toward the passenger 144 toward the rear of the vehicle.

  As illustrated in FIG. 5A, inside the cushion 108, one inner tether 130, 132 and one outer tether 134, 136 are provided on each of the left and right sides in the vehicle width direction. One end of each of the inner tethers 130 and 132 is connected to a boundary portion between the inner expansion portion 158 and the outer expansion portions 160 and 162 of the front restraint portion 128, and one end of each of the outer tethers 134 and 136 is one of the front restraint portions 128. It is connected to the boundary portion between the outer expansion portions 160 and 162 and the protrusions 124 and 126. The inner tethers 130 and 132 and the outer tethers 134 and 136 are tensioned as the cushion 108 is inflated and deployed, and by pulling each part of the front restraint portion 128 forward of the vehicle, the inner inflatable portion 158 and the outer inflatable portion 160, 162 inflates convexly toward the rear of the vehicle.

  The cushion 108 is inflated from the front of the occupant 144 toward the rear so that the head 146 of the occupant 144 is constrained by the inner inflating part 158 of the front restraint part 128. However, in an oblique collision, the occupant 144 may move not only from the seat 104 (see FIG. 1A, etc.) to the front of the vehicle but also to the diagonally forward side of the vehicle interior. Therefore, in the present embodiment, the projecting portions 124 and 126 are provided so as to project to the vehicle rear side from both sides of the front restraint portion 128 in the vehicle width direction.

  FIG. 5B is a view in which the occupant 144 of FIG. 5A further enters the cushion 108 side. As illustrated in FIG. 5B, for example, when the occupant 144 is moving toward the left front, the cushion 108 first moves the head 146 of the occupant 144 with the inner inflatable portion 158 of the front restraint portion 128 in the front of the vehicle. Restrain from. In addition, the cushion 108 restrains the head 146 of the occupant 144 from the side head 148 side by the protrusion 124.

  In the state of FIG. 5B, a force toward the inner inflatable portion 158 is applied to the protruding portion 124 so that the temporal portion 146 can be restrained more suitably. Specifically, the protruding portion 124 squeezes the outer inflating portion 160 so as to be sandwiched between the inner inflating portion 158 and pulls it toward the inner inflating portion 158 to restrain the occupant 144.

  Reference is again made to FIG. The outer expansion portions 160 and 162 are provided on both sides of the inner expansion portion 158 in the vehicle width direction, and expand in a range smaller than the inner expansion portion 158 and the protruding portions 124 and 126. More specifically, in this embodiment, the vehicle expands in a small range in the vehicle width direction (left and right directions indicated by arrows L and R). In other words, the inner tethers 130 and 132 and the outer tethers 134 and 132 are configured such that the radius of curvature when the outer inflatable portions 160 and 162 are inflated toward the occupant side is smaller than the radius of curvature of the inner inflatable portion 158 and the protrusions 124 and 126. The connection location 136 is set.

  FIG. 6 is an enlarged view of the vicinity of the outer expansion portion 160 and the inner expansion portion 158 of FIG. 6 schematically illustrates a circle (center C1) along the curvature of the outer expansion portion 160 and a circle (center C2) along the curvature of the inner expansion portion 158. As illustrated in FIG. 6, the outer expansion portion 160 has a curvature radius r1 (radius connecting the center C1 and the point P1 on the surface), and a curvature radius r2 (center C2 and the surface on the surface) of the inner expansion portion 158. It is set to be smaller than (radius connecting the point P2) (curvature radius r1 <curvature radius r2). Although not shown, the radius of curvature r1 of the outer expansion portion 160 is set to be smaller than the radius of curvature of the protruding portion 124.

  With the above configuration, the rigidity of the outer expansion portion 160 is lower than the rigidity of the inner expansion portion 158 and the protruding portion 124. Therefore, when the cushion 108 is inflated and deployed, the outer inflatable portion 160 is crushed by the inner inflatable portion 158 and the projecting portion 124, and as a result, the projecting portion 124 is pulled toward the inner inflatable portion 158 (FIG. 5). (See (b)). As described above, the outer inflating portions 160 and 162 of the present embodiment are provided as portions that temporarily inflate in the process in which the cushion 108 inflates and expands.

  With the above configuration, the protrusions 124 and 126 in FIG. 5B are applied with forces 150 and 152 toward the inner inflating portion 158 so as to crush the outer inflating portions 160 and 162 with the inner inflating portion 158, respectively. ing. Therefore, for example, the protruding portion 124 close to the occupant 144 has improved restraining force of the side head 146 of the occupant 144. The forces 150 and 152 of the protrusions 124 and 126 can be adjusted by the length of the outer tethers 134 and 136. For example, if the outer tethers 134 and 136 are made shorter, the tension applied to the protrusions 124 and 126 is also increased, and the forces 150 and 152 are increased.

  In the present embodiment, the protrusion 124 can also absorb the rotation of the head 146 of the occupant 144, and the injury value of the occupant 144 can be efficiently suppressed. In particular, the projections 124 and 126 are respectively applied with forces 150 and 152 in a direction to narrow each other, and the projections 124 and 126 restrain the occupant 144 from the opposite sides of the head 146 by movement. I can do it. With this function, the protrusions 124 and 126 can exert a high occupant restraining force on the head 146 of the occupant 144.

  Here, in an oblique collision or the like, when the head 146 of the occupant 144 moving obliquely forward contacts the front cushion 108 of the seat 104 (see FIG. 1A, etc.), the head 146 has a neck as viewed from above. In some cases, a clockwise rotational force (rotation 156 exemplified by an arrow) around the axis is generated. It has been found that such a rotation 156 of the head 146 tends to increase the injury value of the occupant 144. However, in the present embodiment, the inner inflating portion 158 and the protrusions 124 and 126 are actively restrained from the front side of the head portion 146 to the side head portion 148 to reduce or cancel the rotation 156 generated in the head portion 146. Can be absorbed. According to this configuration, the angular velocity of the rotation 156 of the head 146 of the occupant 144 can be reduced, and the injury value of the head 146 associated with the rotation 156 can be suppressed.

  Even if the outer inflating portions 160 and 162 in FIG. 5B are not crushed by the inner inflating portion 158 and the projecting portions 124 and 126, and the shape thereof is maintained, the projecting portions 124 and 126 remain on the head 146 of the occupant 144. It is possible to absorb the rotation 156 and suppress the injury value. This is because the outer inflatable portions 160 and 162 are convexly inflated toward the rear of the vehicle in a small range in the vehicle width direction, and the heads 146 of the occupant 144 come into contact with the inner inflatable portions 158, so This is because an effect of attracting to the inner expanding portion 158 side is obtained.

  Reference is again made to FIG. One end 138 of the inner tether 130 has a vertical dimension that extends over the vertical range of the protrusion 124. With this configuration, the outer inflating portions 160 and 162 (see FIG. 3A) are formed over the vertical range of the protruding portion 124. Therefore, in this embodiment, it is possible to efficiently generate a force toward the inner inflatable portion 158 in the projecting portions 124 and 126. The same effect can be obtained by setting the one end 140 of the outer tether 134 in FIG. That is, it is preferable that at least one of the one end 138 of the inner tether 130 and the one end of the outer tether 134 has a vertical dimension that extends over the vertical range of the protrusion 124.

(Modification)
7 and 8 are diagrams illustrating a modification of the cushion 108 shown in FIG. Henceforth, about the same component as already demonstrated, the description is abbreviate | omitted by attaching | subjecting the same code | symbol. In addition, components having the same names as the components already described have the same functions unless otherwise specified even if they are given different reference numerals.

  FIG. 7A is a diagram illustrating a first modification of the cushion 108 corresponding to FIG. In the cushion 200 illustrated in FIG. 7A, the outer tethers 202 and 204 are connected to the central portions of the inner tethers 130 and 132. Accordingly, the inner tether 130 and the outer tether 202, and the inner tether 132 and the outer tether 204 form an integrated bifurcated tether. Even in this configuration, the inner tethers 130 and 132 and the outer tethers 202 and 204 can efficiently pull the front restraint portion 128 forward of the vehicle, and preferably form the inner inflatable portion 158 and the outer inflatable portion 160. Is possible.

  FIG. 7B is a diagram illustrating a second modification of the cushion 108 corresponding to FIG. As in the cushion 220 illustrated in FIG. 7B, only one protrusion 124 can be provided on one side of the front restraint portion 128 in the vehicle width direction.

  For example, a curtain airbag 222 may be provided on the right side in the vehicle width direction with respect to the passenger bag illustrated in FIG. In this case, as illustrated in FIG. 7B, the cushion 220 is provided with the protruding portion 124 and the outer tether 134 only on the left side (the vehicle inner side) in the vehicle width direction, and the right side in the vehicle width direction is the protruding portion 126 (see FIG. 7). Even if restraint is performed by the curtain airbag 222 while omitting 3 (a), the injury value of the passenger 144 (see FIG. 5B) heading toward the inside of the vehicle at the time of an oblique collision can be restrained efficiently. Is possible.

  As described above, the injury value of the occupant can be suppressed by providing the protruding portion 124 and the outer tether 134 only in one of the front restraint portions 128 in the vehicle width direction. Further, the inner tethers 130 and 132 can be provided only in one of the front restraint portions 128 in the vehicle width direction together with the outer tether 134 as long as the shape of the inner inflatable portion 158 can be maintained.

  FIG. 8 is a diagram illustrating a third modification of the cushion 108 corresponding to FIGS. 3 (a) to 3 (c). As illustrated in FIG. 8A, the cushion 240 is different from the cushion 108 in that the protrusions 244 and 246 protrude rearward in the same degree as the inner expansion portion 158 and expand. This is also illustrated in FIGS. 8B and 8C, which are a DD sectional view and an EE sectional view of the cushion 240 in FIG.

  As described above, even when the protruding portions 244 and 246 protrude to the rear of the vehicle and expand to the same extent as the inner inflatable portion 158, the effect that the protruding portions 244 and 246 are drawn toward the inner inflatable portion 158 can be obtained. Therefore, the restraining force of the occupant's temporal region by the protrusions 244 and 246 is improved as compared to the conventional case, and the occupant's injury value can be efficiently suppressed by absorbing the rotation of the occupant's head.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  INDUSTRIAL APPLICABILITY The present invention can be used for an airbag device including a bag-like cushion that is installed in a vehicle and inflates and deploys in front of a seat.

DESCRIPTION OF SYMBOLS 100 ... Airbag apparatus, 102 ... Instrument panel, 104 ... Seat, 106 ... Accommodating part, 107 ... Cover, 108 ... Cushion, 118 ... Inflator, 120 ... Wind shield, 122 ... Base part, 124 ... Projection part on the left side, 126 ... right side protruding part, 128 ... front restraint part, 130 ... left inner tether, 132 ... right inner tether, 134 ... left outer tether, 136 ... right outer tether, 138 ... one end of inner tether, 139 ... inner The other end of the tether, 140 ... one end of the outer tether, 141 ... the other end of the outer tether, 142 ... the root of the protruding portion, 144 ... the occupant, 146 ... the head, 150 ... the force applied to the left protruding portion, 152 ... the right side Force applied to the protrusion, 156, rotation of the head, 158, inner expansion portion, 160, outer expansion portion on the left side, 162, outer expansion portion on the right side, 20 ... cushion first modification, 202 ... left outer tether, 204 ... right outer tether, 220 ... cushion in the second modified example, 222 ... curtain airbags, 240 ... cushion third modification

Said protrusion part may be provided in the both sides of the vehicle width direction of a front restraint part. According to this configuration, it is possible to absorb the rotation of the occupant's head on either side in the vehicle width direction.

In the state of FIG. 5B, a force toward the inner inflatable portion 158 is applied to the projecting portion 124 so that the head portion 146 can be restrained more suitably. Specifically, the protruding portion 124 squeezes the outer inflating portion 160 so as to be sandwiched between the inner inflating portion 158 and pulls it toward the inner inflating portion 158 to restrain the occupant 144.

With the above configuration, the protrusions 124 and 126 in FIG. 5B are applied with forces 150 and 152 toward the inner inflating portion 158 so as to crush the outer inflating portions 160 and 162 with the inner inflating portion 158, respectively. ing. Therefore, for example, the protruding portion 124 close to the occupant 144 has improved restraining force of the head 146 of the occupant 144. The forces 150 and 152 of the protrusions 124 and 126 can be adjusted by the length of the outer tethers 134 and 136. For example, if the outer tethers 134 and 136 are made shorter, the tension applied to the protrusions 124 and 126 is also increased, and the forces 150 and 152 are increased.

Claims (12)

An airbag device provided with a bag-like cushion installed in a vehicle and inflated and deployed in front of a seat,
The cushion is
An inner inflating portion that protrudes rearward of the vehicle and restrains the head of the occupant from the front of the vehicle;
At least one projecting portion provided on the side of the inner inflating portion in the vehicle width direction and projecting rearward from the inner inflating portion to be inflated;
At least one outer expansion portion that is provided between the inner expansion portion and the protruding portion and temporarily protrudes rearward in the vehicle in a range smaller than the inner expansion portion and the protruding portion;
Including
The airbag device according to claim 1, wherein the outer inflating portion is crushed by the inner inflating portion and the projecting portion, and the projecting portion is pulled toward the inner inflating portion. An airbag device provided with a bag-like cushion installed in a vehicle and inflated and deployed in front of a seat,
The cushion is
An inner inflating portion that protrudes rearward of the vehicle and restrains the head of the occupant from the front of the vehicle;
At least one projecting portion provided on the side of the inner inflatable portion in the vehicle width direction and projecting rearward of the vehicle;
At least one outer inflatable portion provided between the inner inflatable portion and the projecting portion and inflating convexly toward the rear of the vehicle in a range smaller than the inner inflatable portion and the projecting portion;
An airbag device comprising:   The airbag device according to claim 2, wherein the at least one projecting portion projects rearward from the inner inflatable portion and is inflatable.   The airbag device according to claim 2, wherein the at least one protruding portion protrudes toward the rear of the vehicle as much as the inner inflating portion and is inflatable.   5. The apparatus according to claim 2, wherein the at least one outer expansion portion expands in a convex manner toward the rear of the vehicle in a range smaller than the inner expansion portion and the protrusion in the vehicle width direction. The airbag apparatus as described.   The said outer expansion part is crushed by the said inner expansion part and the said protrusion part, and has become the attitude | position with which this protrusion part was drawn near to this inner expansion part side. 2. The airbag device according to item 1. Airbag device.   The airbag device according to any one of claims 1 to 6, wherein a radius of curvature of the outer inflatable portion when inflated is smaller than a radius of curvature of the inner inflatable portion and the protruding portion.   The airbag device according to any one of claims 1 to 7, wherein the protruding portions are provided on both sides of the front restraint portion in the vehicle width direction. The airbag device further includes
At least one inner tether for connecting one end of the cushion to a boundary portion between the inner inflating portion and the outer inflating portion and pulling the portion to the front of the vehicle;
At least one outer tether that has one end connected to a boundary portion between the outer inflating portion and the projecting portion inside the cushion and is tensioned to pull the portion forward of the vehicle;
The airbag device according to any one of claims 1 to 8, further comprising: The outer expansion part is provided on both sides in the vehicle width direction of the inner expansion part,
The airbag device according to claim 9, wherein one inner tether and one outer tether are provided on each of the left and right sides in the vehicle width direction.   11. The airbag device according to claim 9, wherein at least one of the one end of the outer tether and the one end of the inner tether has a vertical dimension that extends over the vertical range of the protruding portion.   The airbag according to any one of claims 9 to 11, wherein the other end of the outer tether and the inner tether is connected to a portion of the interior of the cushion that faces the front restraint portion. apparatus.

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