JP2007152968A - Air bag device for pedestrian - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air bag device for a pedestrian to inflate and deploy so that an air bag may be in an overlapping state at a prescribed position on an external surface of a vehicle body, even when a projecting bending deformation part is generated in a lid. <P>SOLUTION: The lid 20 is arranged to cover an opening 3a for passing through the air bag of a hood 3, and both of the left and right end sides and the center part are connected to a rear edge part of the opening 3a by a hinge 21. When the lid 20 starts to open and is turned over, the vicinity of the center of the lid 20 is deformed to project and bend upward to generate the projecting bending deformation part 23. A recessed part 34 for receiving the projecting bending deformation par 23 is formed on a lower surface side of the inflated air bag 30. The recessed part 34 is formed by tucked seam of the lower surface side of the air bag 30. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an airbag device for a pedestrian having an airbag that inflates along at least a part of a hood of a vehicle body, and more particularly, a walking in which an airbag is accommodated in a case extending in the vehicle body width direction. The present invention relates to an airbag device for a person.

  2. Description of the Related Art A pedestrian airbag apparatus is known in which an airbag is inflated along the vicinity of a cowl portion of a vehicle body to receive a pedestrian or the like (pedestrian or bicycle occupant). As one form of this pedestrian airbag apparatus, a pedestrian airbag apparatus in which an airbag is housed in a case extending in the vehicle body width direction is known (Japanese Patent Laid-Open No. 2005-280556).

  In the publication, the case is arranged directly below an opening provided in the rear portion of the hood. A lid (referred to as an airbag cover in the same publication) is provided so as to cover the opening. This lid is fastened to the case. The lid is provided with a tear line (scheduled break portion). When the airbag is inflated, the lid is cleaved along the tear line, and the airbag is inflated and deployed on the hood.

  As shown in FIG. 4 of JP-A-2005-280556, the rear edge of the lid is curved in an arc shape along the lower edge of the windshield.

  It is conceivable that the rear edge of such a lid is hinged to the opening edge of the hood. FIG. 5 is a perspective view of an automobile equipped with such a pedestrian airbag device, FIG. 6 is a perspective view of the automobile of FIG. 5 when the airbag is inflated, and FIG. 7 is VII-VII of FIG. It is line sectional drawing.

  As shown in FIGS. 5 and 6, the automobile 1 is a four-door sedan, and a pedestrian airbag device 4 is installed at the rear of the hood hood 3. As shown in FIG. 6, when the airbag 5 of the pedestrian airbag apparatus 4 is inflated, the cowl louver 2, the windshield 6, and the left and right A pillars 7 are covered with the airbag 5.

  As shown in FIG. 7, the pedestrian airbag device 4 includes a case 8 for storing the folded airbag 5, an inflator 9 for inflating the airbag 5, and an airbag passage opening of the hood 3. The lid 10 etc. which has closed 3a are provided.

  The case 8 has a long box shape extending in the vehicle body width direction.

  The lid 10 has a central portion in the longitudinal direction and a rear edge side of the vehicle body at both ends secured to a rear edge side of the opening 3 a of the hood 3 by a hinge 11. As shown in FIG. 7, it is configured to open while rotating backward as indicated by an arrow θ. The front edge side of the lid 10 is fastened to the front edge portion of the opening 3a by a locking member (not shown) such as a clip. This locking member is configured to release the locking when the lid 10 is released by being pushed by the airbag 5.

When a pedestrian or the like collides with an automobile equipped with the pedestrian airbag device 4 configured in this way, the inflator 9 is activated based on a detection signal of a pedestrian collision detection sensor (not shown), and the jet The airbag 5 starts to expand due to the gas. The lid 10 is released by being pushed by the inflating airbag 5, and the airbag 5 is deployed along the outer surface of the vehicle body as shown in FIG.
JP 2005-280556 A

  As shown in FIGS. 5 to 7, when the lid 10 has a bow-like shape in plan view and the center portion and both ends of the lid 10 are fastened to the hood 3 by the hinges 11, the lid 10 is When the hinge 11 is opened and rotated around the rotation center and turned upside down, the vicinity of the hinge 11 at the center of the lid 10 is deformed so as to be convex upward, and a convex deformed portion is generated. is there.

  An object of the present invention is to provide a pedestrian airbag device that inflates and deploys so that the airbag overlaps with a specified position on the outer surface of the vehicle body even when the convex deformation portion is generated on the lid. And

  The airbag device for a pedestrian of the present invention (Claim 1) includes an airbag that inflates along at least a part of the rear portion of the hood of the vehicle body, a case that extends in a vehicle body width direction that accommodates the airbag, A pedestrian airbag apparatus having an inflator for inflating an airbag and a lid disposed above the case, the rear edge of the lid being pivotally connected to a vehicle body by a hinge. The rear edge of the lid is curved so that both end sides in the longitudinal direction of the lid are on the rear side of the vehicle body, and a deformation that protrudes upward to a part of the lid when the lid is opened In the pedestrian airbag apparatus in which the portion is generated, the airbag is configured such that when the airbag is inflated, a recess that receives the deformed portion is formed in a portion that overlaps the deformed portion. .

  The pedestrian airbag apparatus according to claim 2 is the pedestrian airbag apparatus according to claim 1, wherein the hinges are provided at least at both ends in the longitudinal direction of the lid and in the vicinity of the middle in the longitudinal direction of the lid. The air bag is provided at a portion facing the middle of the lid when the airbag is inflated.

  The airbag device for a pedestrian according to a third aspect is characterized in that, in the first or second aspect, the concave portion is constituted by hand-stitching the airbag.

  In the pedestrian airbag device of the present invention, the airbag is provided with a recess, and the deformed portion of the lid that is opened and rotated is received in the recess. For this reason, the airbag is inflated and deployed so as to cover the planned deployment area on the outer surface of the vehicle body.

  As in claim 2, in the case where not only the both ends in the longitudinal direction of the rear edge of the lid but also the vicinity of the middle in the longitudinal direction is fastened to the vehicle body by the hinge, a deformed portion is generated near the center of the lid, so It is preferable to provide it at a portion facing the center of the lid during expansion.

  This recess can be easily formed by hand stitching.

  Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 (a) is a plan view of a lid of a pedestrian airbag device according to an embodiment, FIG. 1 (b) is a view taken along line BB in FIG. 1 (a), and FIG. FIG. 3 is a sectional view taken along the line III-III in FIG. 2, and FIG. 4 is a perspective view near the center of the lid as viewed from the direction of arrow IV in FIG.

  2 to 4 show a state where the lid is opened and the inflated airbag covers the outer surface of the vehicle body. In FIG. 2, the inflated airbag is shown in a perspective manner by a two-dot chain line.

  As shown in FIG. 1 (a), the lid 20 of this embodiment also has a front edge 20f and a rear edge 20r that are closer to the front of the vehicle body toward the center as in the lid 10 of FIGS. It has a shape in plan view that is curved in a bow shape. Even in the lid 20, hinges 21 are provided at a total of three locations on both the longitudinal ends of the trailing edge 20 r and the longitudinal center. As shown in FIG. 1 (b), the hinge 21 has a protruding piece shape, and a hole 21a through which a fastener such as a rivet or a bolt is inserted is provided on the plate surface.

  Reference numeral 22 denotes a pedestal for attaching a locking member (not shown) such as a clip, which is provided on the front edge 20f and the rear edge 20r at intervals in the longitudinal direction.

  The lid 20 is disposed so as to cover the airbag passing opening 3a of the hood 3, and each hinge 21 is fixed to the rear edge side of the opening 3a by a rivet, a bolt or the like. Further, the front edge 21 f and the rear edge 20 r of the lid 20 are locked to the edge of the opening 3 a via a locking member provided on the pedestal portion 22.

  Although illustration is omitted, a case 8 is disposed just below the opening 3a as in FIG. 7, and an airbag 30 and an inflator 9 are disposed in the case 8.

  When the inflator 9 is actuated, the airbag 30 is inflated, and the lid 20 pushed by the inflating airbag 30 is pivoted rearward with the hinges 21 as pivot centers to open.

  Since not only the both ends of the lid 20 but also the center part is connected to the rear edge of the opening 3a by the hinge 21, when the lid 20 is opened and turned upside down, the lid 20 is as shown in FIG. It buckles to the original center of the curve (in the state before the opening rotation) along the rear edge of the opening 3a. At this time, the front edge 20f side of the lid 20 which was originally the curved outer peripheral side is compressed toward the center side in the extending direction, and the vicinity of the center of the lid 20 is bent upward as shown in FIGS. Deform. As a result, the convex deformation part 23 protruding upward is generated near the center of the lid 20.

  Next, the configuration of the airbag 30 will be described with reference to FIGS.

  The airbag 30 is formed by overlapping an upper panel 31 and a lower panel 32 and stitching their peripheral portions into a bag shape.

  The airbag 30 is connected to the hood covering portion 30a covering the lower portion of the windshield 6 from the rear portion of the hood 3 and the left and right ends of the hood covering portion 30a. It has a substantially U shape having a pair of pillar covering portions 30b, 30b covering at least a part of the A pillar 7. However, the deployment shape of the airbag 30 is not limited to this, and may be, for example, a substantially rectangular shape covering substantially the entire windshield and A pillar from the rear portion of the hood, and further, the left and right sides of the hood covering portion 30a. It may be substantially H-shaped with a pair of fender covering portions extending forward so as to cover the left and right fender portions from both end sides.

  When the airbag 30 is inflated, the hood covering portion 30a covers the rear portion of the hood 3 so as to ride on the lid 20 that is opened and turned upside down.

  As shown in FIGS. 3 and 4, when the airbag 30 is inflated, the airbag 30 faces the lower surface near the center in the left-right direction, that is, near the center of the lid 20 that is open and turned inside out. A concave portion 34 that can receive the convex deformation portion 23 generated near the center of the lid 20 is formed at a position where the lid 20 is formed.

  In this embodiment, as shown in FIG. 3, the lower panel 32 is hand-sewn in the vicinity of the center of the hood covering portion 30a (that is, the vicinity of the center of the lower panel 32 is air-operated). A predetermined amount is picked to the outside of the bag, and the vicinity of the base is sewn with a seam S made of a sewing thread or the like). The code | symbol 33 of FIG. 3 has shown this knob stitch part. As a result, when the airbag 30 is inflated, the lower panel 32 falls to the inside of the airbag near the center of the hood covering portion 30a, and a recess 34 is formed. In addition, this pinching part 33 may be formed so that this lower panel 32 may be picked out to the airbag inner side.

  In the pedestrian airbag device having such a configuration, the convex deformation portion 23 of the lid 20 is received in the concave portion 34 on the lower surface side of the inflated airbag 30 (hood covering portion 30a). It is prevented that the bag 30 rides on the convex deformation part 23 and the posture becomes unstable, or the bag 30 is unfolded at a position deviated from a predetermined planned deployment position.

  The above embodiment shows an example of the present invention, and the present invention is not limited to the above embodiment.

  For example, the lid may be connected to the vehicle body by hinges at portions other than the right and left ends of the rear edge and the center portion.

  In the above embodiment, the recess is formed by picking and sewing the airbag, but by other methods such as draping or connecting the upper and lower panels of the airbag with a hanging strap or the like You may make it form a recessed part.

  In the present invention, the convex deformation part may be formed at a place other than the center part at the time of opening the lid, and the convex deformation part may be formed at a plurality of places. The formation position of the convex deformation part may be obtained experimentally. For example, a weak part may be provided at a predetermined position of the lid, and the convex deformation may be induced in the weak part.

  Of course, the concave portion may be formed at a location other than the central portion of the airbag in accordance with the position of the convex deformation portion.

(A) The figure is a top view of the lid of the airbag apparatus for pedestrians which concerns on embodiment, (b) A figure is a BB arrow directional view of (a) figure. It is a top view of the airbag deployment area | region vicinity of the motor vehicle of FIG. It is the III-III sectional view taken on the line of FIG. FIG. 4 is a perspective view of the vicinity of the center of the lid as viewed from the direction of arrow IV in FIG. 2. It is a perspective view of the motor vehicle provided with the airbag apparatus for pedestrians which concerns on a comparative example. FIG. 6 is a perspective view of the automobile of FIG. 5 when the airbag is inflated. It is the VII-VII sectional view taken on the line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car 3 Bonnet hood 3a Opening 4 Pedestrian airbag device 5 Air bag 8 Case 9 Inflator 10, 20 Lid 11, 21 Hinge 23 Convex deformation part 30 Air bag 33 Hand stitch part 34 Concave part

Claims (3)

An airbag that inflates along at least a part of the rear portion of the hood of the vehicle body, a case that extends in the vehicle body width direction that accommodates the airbag, an inflator for inflating the airbag, and an upper portion of the case A pedestrian airbag device having a lid formed thereon,
The rear edge of the lid is pivotally connected to the vehicle body by a hinge,
The rear edge of the lid is curved so that both end sides in the longitudinal direction of the lid are on the rear side of the vehicle body, and when the lid is opened, a deformed portion that protrudes upward is formed in a part of the lid. In a pedestrian airbag device,
The airbag device for a pedestrian, wherein when the airbag is inflated, a recessed portion for receiving the deformed portion is formed in a portion overlapping the deformable portion. In Claim 1, the hinges are provided at least at both ends in the longitudinal direction of the lid and near the middle in the longitudinal direction of the lid, respectively.
2. The pedestrian airbag apparatus according to claim 1, wherein the recess is provided at a portion facing the middle of the lid when the airbag is inflated.   The pedestrian airbag apparatus according to claim 1 or 2, wherein the concave portion is configured by hand-stitching an airbag.

Images