JP2006159971A - Airbag device placed outside vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To sufficiently absorb shock of an obstacle even when the long obstacle abuts on an airbag by solving the point wherein it is impossible to receive to absorb the rotation of an upper end part when the long obstacle abuts on the airbag. <P>SOLUTION: An airbag device placed outside a vehicle is provided with an inflator 82 near a root part 71 of the airbag 31L, and tethers 73 to 75 arranging the shape of the airbag in a state inflated and deployed by the inflator 72. Pinched parts 76, 77 are formed by connecting at least the upper edges 73a to 75a and the lower edges 73b to 75b of the tethers 73 to 75 to the airbag 31L, and inflated parts 78, 78 inflated by the inflator are formed on both sides of the pinched parts 76, 77, and the tethers 74, 75 for regulating the root part as the regulation part regulating the vicinity of the root part of the airbag 31L are included by disposing at least a pair of inflated parts are disposed in approximate V shape and in the right and left overstriding the inflator 89 on the tethers 73 to 75. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle-installed airbag apparatus that inflates and deploys an airbag along an upper surface of a hood or a front surface of a windshield.

  Various forms of collision of the obstacle with the vehicle are assumed, and it is conceivable that the obstacle hits another part of the vehicle after hitting the front bumper of the vehicle. The first collision where the obstacle hits the front bumper or the like will be referred to as “primary collision”, and the collision that hits another part of the vehicle will be referred to as “secondary collision”.

  As a vehicle-mounted airbag device, immediately after the primary collision, the airbag is inflated and deployed to cover the outside of the vehicle, such as the front pillar and windshield, to reduce the impact when an obstacle collides with the outside of the vehicle. Air bags have been proposed.

As such a vehicle-mounted airbag device, an airbag provided with a tether (strap) that regulates the deployment shape of the airbag is known (for example, see Patent Document 1).
JP 2003-306100 A (page 9, FIG. 5)

  FIG. 18 is a diagram for explaining a conventional basic configuration. A vehicular air bag apparatus 240 is provided with a belt-like tether (strap) 245 from the upper end to the lower end of the air bag 241 at the approximate center in the air bag 241. In addition to extending the tether 245 in the longitudinal direction of the vehicle body, connecting the front and rear edges of the tether 245 to the inner periphery of the airbag 241, respectively, the neck portion 246, 246 is formed in the airbag 241; Swelling portions (convex curved portions) 247 and 247 that can come into contact with the front window glass 242 and the garnish 243 are formed with the constricted portions 246 and 246 interposed therebetween.

  In general, short obstacles (for example, pedestrians with low elongation) hit the airbag from the upper end (for example, the head), and long obstacles (for example, pedestrians with high elongation) are generally centered (for example, It hits from the waist or chest) and exhibits a movement in which the upper end rotates with this substantially central portion as a fulcrum. Therefore, since the upper end portion can be directly received by a short obstacle, the force for rotating the upper end portion by the airbag does not act. However, in the case of a long obstacle, the upper end is set with the substantially central portion as a fulcrum by being stopped by the airbag. Since the force which rotates a part acts, it wants to receive so that rotation of an upper end part may be relieved.

However, in the vehicle-mounted airbag device 240, the tether 245 is passed to the approximate center of the vertically long airbag 241 to form the bulging portions (convex curved portions) 247 and 247 that can contact the front window glass 242 and the garnish 243. Therefore, the shape of the root portion of the airbag 241 where the inflator (not shown) is arranged cannot be regulated.
Therefore, if it bulges more than necessary, for example, if the bulging part hits the approximate center part (waist or chest) of a long obstacle (a tall pedestrian), the approximately center part is stopped, There is a problem that the upper end (head) starts to rotate as a fulcrum and cannot be received so as to moderate the rotation of the upper end.
In general, in an airbag device such as a vehicle-mounted airbag device, an inflator is usually installed at the base portion of the airbag, which may impose restrictions on the design of the airbag.

  In other words, even when obstacles with different lengths (long obstacles or short obstacles) come into contact with the airbag, the impact of the obstacles can be sufficiently absorbed, and the degree of freedom in installing the inflator is improved. There is a desire for an air bag device that can be installed outside the vehicle.

  The present invention solves the problem that the upper end cannot be relieved when a long obstacle comes into contact with the airbag, and even when a long obstacle comes into contact, the impact of the obstacle is sufficiently absorbed. The vehicle outside air bag apparatus that can provide a vehicle air bag apparatus that solves the limitations of the air bag design and can improve the flexibility of the location of the inflator is provided. It is an object to provide an airbag device.

  According to a first aspect of the present invention, there is provided a vehicle exterior airbag device in which a substantially cylindrical airbag is inflated and deployed longitudinally with an inflator in the longitudinal direction of the vehicle while being along the outer surface of the vehicle. A tether that divides the width direction of the bag is provided, and at least the upper and lower edges of the tether are connected to the airbag to form a constricted portion, and an inflated portion that is inflated on both sides of the constricted portion by an inflator The tether is provided with a restricting portion for restricting at least a pair of the vicinity of the root portion of the airbag on which the inflator is disposed to the left and right with the inflator interposed therebetween.

  For example, if a long obstacle comes into contact with the airbag and can be received so as to moderate the rotation of the upper end, the same shock absorbing effect can be exerted on both obstacles of different lengths. This is preferable because it is possible.

  That is, the airbag is provided with a tether that divides the width direction of the bag in the expanded state, and at least the upper and lower edges of the tether are connected to the airbag to form a constricted portion, and on both sides of the constricted portion. By forming a bulging part to be inflated with an inflator and providing a regulating part that regulates to the vicinity of the base part of the airbag where the inflator is arranged in the dither, the airbag is substantially at the center of a long obstacle (a tall pedestrian) The part (waist or chest) abuts, and when the airbag is pushed in at the approximate center, the rotational speed (transfer speed) of the upper end (head) is lowered to absorb the impact of the obstacle.

The invention according to claim 2 is characterized in that the restricting portion restricts the height of the airbag gradually toward the rear.
By restricting the airbag so that the height of the airbag is gradually increased with the regulating portion directed rearward, it is possible to further improve the impact absorption of a long obstacle (a tall pedestrian).

  The invention according to claim 3 is characterized in that the inflator is externally attached to the airbag, and the bulging portion is communicated by forming a communication hole in the tether.

For example, if it is possible to improve the flexibility of the place where the inflator is installed, it is preferable because the space efficiency of the vehicle body can be improved.
By externally attaching the inflator to the airbag, it is possible to improve the degree of freedom of the installation location of the inflator.

  In the invention according to claim 1, the airbag is provided with a tether that divides the bag width direction in a state where the airbag is inflated and deployed, and at least the upper and lower edges of the tether are connected to the airbag to form a constricted portion, Formed on both sides of the constricted portion is an inflated portion that is inflated with an inflator, and the tether is provided with a dither up to the vicinity of the root portion of the airbag where the inflator is arranged, and further provided with a regulating portion that regulates the airbag Therefore, when the airbag is pushed at the substantially central portion (waist or chest) of the long obstacle (a tall pedestrian) comes into contact with the airbag, the substantially central portion may be suddenly stopped. The rotational speed (transfer speed) at the upper end can be reduced. As a result, when the upper end hits the airbag, there is an advantage that the airbag can be received so as to moderate the rotation of the upper end.

  In the invention according to claim 2, by restricting the airbag so that the height of the airbag is gradually increased toward the rear by the restricting portion, the impact absorption of a long obstacle (a tall pedestrian) is further increased. There is an advantage that it can be improved.

  In the invention according to claim 3, since the inflator is externally attached to the airbag, it is possible to improve the degree of freedom of the installation location of the inflator. As a result, there is an advantage that the space efficiency of the vehicle body can be improved.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a perspective view of a vehicle employing a vehicle-mounted airbag device according to the present invention. A vehicle 10 includes a hood (bonnet) 12 at the front of a vehicle body 11, and a front window glass behind the hood 12. 13, a vehicle-mounted air bag device 30 (hereinafter abbreviated as “airbag device 30”) is provided between the hood 12 and the front window glass 13. The airbag apparatus 30L, 30R is provided.

  In the figure, 15 is a roof, 16 is a front bumper, 17 is a headlamp, 18 is a front fender, 19 is a front side door, 21 is a front side window glass, 22 is a door mirror, and 23 is a front wheel. It shows that the airbag 31 of the airbag device 30 and the airbags 31L, 31R of the vehicle-mounted airbag devices 30L, 30R are inflated and deployed.

The airbag device 30 is a device that causes the airbag 31 to inflate and deploy on the front surface of the front window glass 13 that is outside the passenger compartment, so as to reduce the impact when the obstacle collides with the outside of the passenger compartment.
The airbag devices 30L and 30R inflate and deploy the airbags 31L and 31R on the front surfaces of the left and right front pillars 14 and 14 as the outer surface of the vehicle, and alleviate the impact when an obstacle secondarily collides with the outside of the passenger compartment. This device will be described in detail with reference to FIGS.

2 is a cross-sectional view taken along line 2-2 of FIG. 1 and shows a cross section of the airbag device 30 when the airbag 31 is inflated and deployed.
The airbag device 30 includes an airbag 31 that is inflated and deployed on the front surface of the front window glass 13, a storage case (bag storage case) 32 that stores the airbag 31, and an upper opening (case opening) 34 of the storage case 32. A case lid (case lid body) 36 to be covered, and an inflator 39 disposed on the bottom 37 of the airbag 31 and the bottom 38 of the storage case 32.

  The air bag 31 has tethers 41..., 42... Passed to the inside in order to inflate and deploy into a predetermined shape, and a discharge port (vent hole) 43 for discharging (releasing) gas. And a bag-side through hole 44 through which the set screw of the inflator 39 is passed.

FIG. 3 is a cross-sectional view showing a state before the airbag is inflated and deployed in the vehicle exterior airbag device according to the present invention.
The storage case 32 has case-side through holes 45 and 45 (in order to pass through the opening 71 communicating with the discharge port 43 of the airbag 31 and the set screw portions 67 and 67 of the inflator 39 (the inner 67 is not shown)). The back 45 is not shown) and the upper opening 34 for covering the case lid 36 and expanding and deploying the airbag 31 is provided.
Note that the outlet 43 of the airbag 31 and the openings 71 of the storage case 32 are integrally fixed by a plurality of fasteners (rivets) 46.

  The case lid 36 has one end of a hinge 53 attached to the front end portion 51, the other end of the hinge 53 attached to the front side surface 54 of the storage case 32, and the rear end portion 52 attached to the rear side surface 55 of the storage case 32. A weak portion 56 is provided that is broken when the airbag 31 is inflated and deployed. The fragile portion 56 is a portion of a broken line formed thinly, and this broken line may be called a tear line.

  In the figure, 57 denotes a mounting screw for attaching the hinge 53 to the front end portion 51 of the case lid 36, 58 denotes a mounting screw for attaching the hinge 53 to the front side surface 54, and 59 denotes a rear end portion 52 of the case lid 36 to the rear side surface 55. Indicates the mounting screw.

The inflator (inflator assembly) 39 includes an inflator cylinder 62 in which an explosive 61 is incorporated, and a support fitting 63 that supports the inflator cylinder 62.
The inflator cylinder 62 includes gas discharge holes 64 that discharge gas generated when the explosive 61 is exploded into the airbag 31.

  The support metal fitting 63 includes a base metal fitting 65, ring portions 66 and 66 (not shown in the back 66) for stopping the inflator cylinder 62 by attaching to the base metal fitting 65, the bag side through hole 44 and the case side through hole 45. Are provided with set screw portions 67 and 67 (67 is not shown in the back) that are fastened together with the airbag 31 and the storage case 32. Reference numeral 68 denotes a nut screwed into the set screw portion 67, and reference numeral 69 denotes a washer interposed between the nut 68 and the bottom portion 38 of the storage case 32.

FIG. 4 is a view taken in the direction of arrow 4 in FIG. 1 and shows the airbag device 30 when the airbag 31 is inflated and deployed.
The airbag device 30 stores an airbag 31 in a storage case 32, an inflator 39 is provided in the airbag 31, and the internal pressure of the airbag 31 is increased by gas generated by igniting the inflator 39, The fragile portion 56 of the case lid 36 is broken by the airbag 31, the case lid 36 is rotated forward, and the airbag 31 is inflated and deployed with the gas generated from the inflator 39. It is an apparatus that covers the front surface of the window glass 13 (see FIG. 1).

  Hereinafter, the vehicle-mounted airbag device 30L will be described in detail. In addition, the vehicle exterior airbag device 30R for the right front pillar 14 (see FIG. 1) is symmetrical with respect to the vehicle body center with respect to the vehicle exterior airbag device 30L, and detailed description thereof is omitted.

  FIG. 5 is a perspective view of a vehicle exterior airbag device for the left front pillar according to the present invention. The vehicle exterior airbag device 30L is substantially cylindrical in the longitudinal direction of the vehicle along the vehicle outer surface. In the vehicle outside air bag apparatus in which the bag 31L is inflated and deployed with the inflator 89 in the longitudinal direction, the vehicle outside air bag apparatus 30L has the inflator 82 disposed in the vicinity of the root portion 71 of the air bag 31L. By providing tethers 73 to 75 for adjusting the shape of the bag in the deployed state and connecting at least the upper edges 73a to 75a and the lower edges 73b to 75b of the tethers 73 to 75 to the airbag 31L, the constricted portions 76 and 77 are formed. And forming bulging portions 78 and 78 which are bulged by an inflator on both sides of the constricted portions 76 and 77. 3 to 75, including base portion regulating dithers 74 and 75 as regulating portions that regulate the vicinity of the root portion of the airbag 31L by disposing at least a pair in a substantially square shape across the inflator 89 and on the left and right. It is an airbag device that can protect an obstacle (for example, a pedestrian).

  That is, the dithers 73 to 75 are provided with root portion regulating dithers 74 and 75 as regulating portions for regulating the vicinity of the root portion of the airbag 31 </ b> L so as to be disposed in a substantially square shape across the inflator 72 and to the left and right. Thus, the dithers 74 and 75 can be passed to the root portion 71 of the airbag 31L. As a result, the root portion 71 of the airbag 31L can be sufficiently restricted, and unnecessary rise of the root portion 71 can be prevented.

  6 is a cross-sectional view taken along line 6-6 in FIG. 5. That is, the vehicle-mounted airbag device 30L accommodates the airbag 31L that is inflated and deployed on the front surface of the left front pillar 14, and the airbag 31L. A storage case (retainer) 82, a case lid (case lid) 86 covering the upper opening (case opening) 84 of the storage case 82, a bottom 87 of the airbag 31L, and a bottom portion 88 of the storage case 82 are arranged. An inflator 89.

The airbag 31L includes an airbag main body 72 and dithers 73 to 75 that adjust the airbag main body 72 into a predetermined shape.
The airbag main body 72 has constricted portions 76 and 77 formed by being regulated by the dithers 73 to 75, and bulged portions (convex curved portions) 78 that are inflated by the inflator 139 on both sides of the constricted portions 76 and 77. 78, and vent holes (discharge ports) 79, 79 for releasing the internal pressure of the airbag 31L.

  The tether 73 is a tethering member that is adjusted to a predetermined shape by passing from the center to the rear of the center of the airbag main body 72, and is a member that forms the constricted portion 76. Reference numeral 73a denotes an upper edge of the tether 73, and reference numeral 73b denotes a lower edge of the tether 73.

  The tethers 74 and 75 are disposed at the airbag main body 72 in a substantially square shape across the inflator 89 and at least one pair on the left and right, thereby restricting the root portion as a regulating portion that regulates the vicinity of the root portion of the airbag 31L. The dither is a dither that prevents the root portion 71 from being unnecessarily raised by sufficiently restricting the root portion 71 of the airbag 31L. 74a and 75a indicate upper edges of the tethers 74 and 75, and 74b and 75b indicate lower edges of the tethers 74 and 75.

The storage case 82 is a member having substantially the same configuration as the storage case 32 (see FIG. 2).
The inflator 89 is a member having substantially the same configuration as the inflator 39 (see FIG. 2), 91 is an explosive, 92 is an inflator cylinder, 93 is a support fitting for supporting the inflator cylinder 92, and 94 is formed in the inflator cylinder 92. The gas discharge hole 98 is a nut that holds the support fitting 163 to the bottom 88 of the storage case 82.

  FIG. 7 is a perspective view of a vehicle-exposed airbag device according to a second embodiment of the present invention. The vehicle-exposed airbag device 30L is a substantially cylindrical airbag in the vehicle front-rear direction along the vehicle outer surface. In the vehicle-mounted air bag apparatus in which 31L is inflated and deployed with an inflator 139 in the longitudinal direction, tethers 145 and 145 that divide the bag width direction in a state in which the airbag 31L is inflated and deployed are provided, and the tethers 145 and 145 By connecting at least the upper edge 151 and the lower edges 152a, 152b (see FIG. 8) to the airbag 31L, a constricted portion (concave portion or groove) 153 is formed, and the constricted portion 153 is inflated by an inflator 139 on both sides. Bulges (convex curved parts) 144, 144 to be formed, and airbags in which the inflators 139 are disposed on the tethers 145, 145. It is provided with restricting portions 146 and 146 (see FIG. 8) for restricting the vicinity of the root portion 154 (see FIG. 8) of the 30L so as to gradually increase the height of the airbag 30L toward the rear. An airbag device capable of protecting an object (for example, a pedestrian).

8 is a cross-sectional view taken along line 8-8 in FIG.
The vehicle outside air bag device 130 includes an air bag 131 that is inflated and deployed on the front surface of the left front pillar 14, a storage case (retainer) 132 that stores the air bag 131, and an upper opening (case) of the storage case 132. (Opening) 134 and a case lid (case lid) 136, and a bottom 137 of the airbag 31 </ b> L and an inflator 139 disposed on the bottom 138 of the storage case 132.

The airbag 131 includes an airbag main body 142 and 145 and 145 for adjusting the airbag main body 142 into a predetermined shape.
The airbag main body 142 includes vent holes (discharge ports) 143 that release the internal pressure of the airbag 31L, and bulging portions (convex curved portions) 144 and 144 that are bulged by the inflator 139.

  The tether 145 is a partition member that partitions the airbag main body 142 into a plurality of chambers 147 to 149, and a tethering member that allows the plurality of chambers 147 to 149 (see FIG. 9) to communicate with each other and adjust the airbag main body 142 into a predetermined shape. But there is. The tether 145 includes communication holes 145a to 145c that allow the respective chambers 147 to 149 to communicate with each other, and a restriction portion 146 that restricts the height of the airbag 130 gradually with the airbag body 142 facing rearward. .

The storage case 132 is a member having substantially the same configuration as the storage case 32 (see FIG. 2).
The case lid 136 is a member having substantially the same configuration as the case lid 36 (see FIG. 2), and includes a fragile portion 156 that opens the storage case 132.

  The inflator 139 is a member having substantially the same configuration as that of the inflator 39 (see FIG. 2), 161 is an explosive, 162 is an inflator cylinder, 163 is a support fitting for supporting the inflator cylinder 162, and 164 is formed in the inflator cylinder 162. The gas discharge hole 168 indicates a nut for fixing the support fitting 163 to the bottom 138 of the storage case 132.

9 is a cross-sectional view taken along line 9-9 in FIG. 7, and is a vertical cross-section of the airbag 131 of the vehicle-mounted airbag device 130. FIG.
The airbag 131 indicates that the airbag main body 142 and tethers 145 and 145 that partition the airbag main body 142 into the respective chambers 147 to 149 are provided. The tethers 145 and 145 are passed to the airbag main body 142. By providing openings 145a to 145c (only 145b is shown) on the left and right of the tethers 145 and 145, the gas generated by the inflator 139 can be evenly supplied to the chambers 147 to 149. Reference numeral 157 denotes an inclined portion formed by being inclined forward in the vicinity of the root portion 154 of the airbag 130 regulated by the tethers 145 and 145 (specifically, in front of the upper portion of the root portion 154). Reference numerals 158 and 158 denote vent holes that keep the bag pressure optimal.

10A and 10B are operation explanatory views for explaining the operation of the vehicle-mounted air bag device according to the present invention. FIG. 10A shows a vehicle-mounted air bag device 230 of a comparative example, and FIG. A standing airbag device 30L is shown.
In (a), the vehicle-installed airbag device 230 includes an airbag 231 that protects an obstacle, a storage case 232 that stores the airbag 231, and an inflator 233 that inflates and deploys the airbag 231. The airbag 231 is composed of an airbag body 234 and a tether 235 that adjusts the shape of the airbag body 234.

  However, since the tether 235 is provided substantially at the center of the airbag body 234, the tether 235 cannot be disposed near the inflator 233. Therefore, the shape of the airbag main body 234 near the inflator 233 cannot be restricted, and unnecessary bulging of the airbag 231 cannot be avoided as indicated by the white arrow. This unnecessary bulging was a factor that adversely affected the behavior of obstacles (pedestrians) in secondary collisions.

  In (b), since the tethers 145 and 145 are transferred to the airbag body 142 in a cross-sectional view, for example, the tethers 145 and 145 are attached to the airbag body 142 over the entire circumference while avoiding the inflator 139. Can be passed. Therefore, a desired part of the airbag main body 142 can be regulated, and unnecessary bulging of the airbag 31L can be avoided.

  FIGS. 11A to 11D are explanatory diagrams of the mechanism of secondary collision with a long obstacle. T1 indicates a long obstacle (for example, a tall pedestrian).

  (A)-(c) is an illustration in case the long obstruction (tall pedestrian) 204 collides with the vehicle 200. In (a), the long obstruction 204 is a front bumper (front end) of the vehicle 200. When hitting 201, it falls down as shown by arrow a1. In this state, the airbag 203 starts to expand and deploy. In (b), the obstacle 204 slides up the hood (upper surface) 202 of the vehicle 200 as indicated by an arrow a2. On the other hand, when the airbag 203 is inflated and deployed, the substantially central portion (for example, the pedestrian's waist or chest) 206 of the obstacle 204 is stopped at the front end of the airbag 203, and the upper end portion (for example, the head of the obstacle 204). ) 205 is subjected to a rotating force as indicated by an arrow a3 with the substantially central portion 206 of the obstacle 204 as a fulcrum. In (c), the upper end 205 of the obstacle 204 is received by the airbag 203.

  That is, when the bulge of the base portion (front end portion) 209 of the airbag 203 shown in (b) is large, the substantially central portion (waist or chest) 206 is suddenly stopped and the upper end portion (head) 205 is rotated. It rises as shown by arrow a3.

(D) is the vehicle exterior airbag device 30L of the present invention, and is an example of a state corresponding to the above (b). As shown in FIG. 5, the vehicle-installed airbag device 30 </ b> L is configured to abbreviate an obstacle (pedestrian) 49 by restricting the bulging of the root portion (front end portion) 71 with the root portion regulating dithers 74 and 75. It is considered that the central portion (waist or chest) 49b is not suddenly stopped, and the rotation of the upper end portion (head) 49a can be relaxed. Note that a short obstacle (for a short pedestrian, the upper end (head) directly hits the airbag 203, and thus the problem like the long obstacle 204 does not occur.
FIG. 12 is a perspective view of a vehicle exterior airbag device according to a third embodiment of the present invention. The same components as those used in the vehicle exterior airbag device 130 (see FIG. 8) are denoted by the same reference numerals. Detailed explanation is omitted.

  The vehicle-mounted air bag device 170 includes an air bag 171 including an air bag main body 172 and tethers 175 and 175 for adjusting the air bag main body 172 into a predetermined shape. Is arranged in parallel to the airbag main body 172 so as to avoid the inflator 139. Further, the airbag 171 is a bag provided with an inclined portion 177 that suppresses unnecessary bulging by being restricted by the tethers 175 and 175.

  The inclined portion 177 is a portion in which the upper front portion of the airbag 171 regulated by the tethers 175 and 175 is formed in a forward inclination.

  In the figure, 132 is a storage case, 173 is a constricted portion (concave portion or groove) of the airbag 171, 174 a is a bulged portion (convex curved portion) in the center of the airbag 171, and 174 b and 174 b are both sides of the airbag 171. Bulging portions (convex curved portions) 178a, 178b, 178b indicate vent holes.

13 is a cross-sectional view taken along line 13-13 of FIG. 12, and shows a cross section of the airbag 171. FIG.
The tether 175 has a restricting portion 176 (see FIG. 12) for restricting the airbag body 172 so that the height of the airbag 171 is gradually increased with the airbag body 172 facing rearward, and a communication hole 175a for communicating the airbag body 172. -(Only one is shown).

  FIG. 14 is a perspective view of a vehicle exterior airbag device according to a fourth embodiment of the present invention. The same components as those used in the vehicle exterior airbag device 130 (see FIG. 8) are denoted by the same reference numerals and are shown in detail. The detailed explanation is omitted. 15 is a cross-sectional view taken along the line 15-15 in FIG. 14 and shows a transverse cross section of the airbag 181. FIG.

  The vehicle-mounted air bag device 180 is configured to avoid the inflator 139 by forming the air bag 181 in a substantially cylindrical bag and arranging the two tethers 185 and 185 in parallel to the air bag 181. It is a thing.

  In the figure, 132 is a storage case, 182 is an airbag body, 183 is a constricted portion (concave portion or groove) of the airbag 171, 184 a is a central bulging portion (convex curved portion) of the airbag 181, and 184 b and 184 b are Inflated portions (convex curved portions) on both sides of the airbag 181, 185 a and 185 a are communication holes formed in the tether 185, and 188 a, 188 b and 188 b indicate vent holes.

FIG. 16 is a perspective view of a vehicle exterior airbag device according to a fifth embodiment of the present invention. The same components as those used in the vehicle exterior airbag device 130 (see FIG. 8) are denoted by the same reference numerals and shown in detail. The detailed explanation is omitted.
The vehicle-mounted airbag device 190 is provided with an inflator 199 externally attached to the airbag 191, thereby avoiding the tether 195 and by restricting the airbag 191 with the tether 195 so as to prevent unnecessary bulging. A portion 197 is formed.

  In the figure, 192 is an airbag body, 193 is a constricted portion (concave portion or groove) of the airbag 191, 194 is a bulging portion (convex curved portion) of the airbag 191, 195a to 195c are communication holes of the tether 195, 196 Denotes a regulating portion formed on the tether 195, 197 denotes an inclined portion regulated by the regulating portion 196, and 198 and 198 denote vent holes.

  17 is a cross-sectional view taken along the line 17-17 in FIG. 16. The vehicle-mounted airbag device 190 has an inflator 199 externally attached to the airbag 191, and communication holes 195a to 195c (195a and 195c are shown in the figure). 16), it can be said that the bulging portions 194 and 194 are communicated.

For example, if it is possible to improve the flexibility of the place where the inflator is installed, it is preferable because the space efficiency of the vehicle body can be improved.
That is, by attaching the inflator 199 to the airbag 191, it is possible to improve the degree of freedom of the installation location of the inflator 199. As a result, the space efficiency of the vehicle body 10 (see FIG. 1) can be improved.

  As shown in FIG. 8, the vehicle-installed airbag apparatus according to the present invention is not limited to the above, in which the upper edge 151 and the lower edges 152a and 152b of the tethers 145 and 145 are connected to the airbag 130. For example, it may be connected (sewn) over the entire circumference inside the airbag.

  The vehicle-mounted air bag device according to the present invention is suitable for use in a passenger car (vehicle) such as a sedan or a wagon having a relatively long front nose.

1 is a perspective view of a vehicle that employs an outboard vehicle airbag device according to the present invention. FIG. 2 is a sectional view taken along line 2-2 of FIG. It is sectional drawing which shows the state before the expansion | deployment deployment of the airbag of the vehicle-mounted air bag apparatus which concerns on this invention. FIG. 4 is a view taken in the direction of arrow 4 in FIG. 1. It is. 1 is a perspective view of a vehicle exterior airbag device for a left front pillar according to the present invention. FIG. 6 is a sectional view taken along line 6-6 of FIG. It is a perspective view of the vehicle outside air bag apparatus of 2nd Embodiment which concerns on this invention. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 7. FIG. 9 is a cross-sectional view taken along line 9-9 in FIG. 7. It is an operation explanatory view explaining an operation of the outside air bag device according to the present invention. It is explanatory drawing of the mechanism of the secondary collision with a long obstruction. It is a perspective view of the vehicle outside air bag apparatus of 3rd Embodiment which concerns on this invention. FIG. 13 is a sectional view taken along line 13-13 of FIG. It is a perspective view of the vehicle outside air bag apparatus of 4th Embodiment which concerns on this invention. FIG. 15 is a cross-sectional view taken along line 15-15 in FIG. 14. It is a perspective view of the vehicle outside air bag apparatus of 5th Embodiment which concerns on this invention. FIG. 17 is a cross-sectional view taken along line 17-17 in FIG. 16. It is a figure explaining the conventional basic composition.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Vehicle, 14 ... Vehicle outer surface (front pillar), 30L ... Outside vehicle airbag apparatus, 31L ... Air bag, 71 ... Root part, 73 ... Tether, 74, 75 ... Restriction part (root part regulation dither) 73a to 75a ... upper edge, 73b to 75b ... lower edge, 76, 77 ... constricted part, 89 ... inflator, 78 ... bulging part, 190 ... air bag device placed outside the vehicle, 191 ... air bag, 194 ... bulging Part, 195 ... tether, 195a to 195c ... communication hole, 199 ... inflator.

Claims (3)

In a vehicle-installed airbag device that inflates and deploys a substantially cylindrical airbag in the longitudinal direction with an inflator in the longitudinal direction of the vehicle while being along the vehicle outer surface,
The airbag is provided with a tether that divides the width direction of the bag in the inflated and deployed state, and at least the upper and lower edges of the tether are connected to the airbag to form a constricted portion. Formed on both sides with bulges that bulge with the inflator;
The vehicular air bag apparatus according to claim 1, wherein the tether includes a restricting portion that restricts at least a pair of left and right sides of a base portion of the air bag on which the inflator is disposed with the inflator interposed therebetween.   The vehicle outside air bag apparatus according to claim 1, wherein the restricting portion restricts the height of the airbag to gradually increase toward the rear.   2. The vehicle-mounted airbag device according to claim 1, wherein the inflator is externally attached to the airbag and the bulging portion is communicated with the tether by forming a communication hole. 3.

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