JP5987849B2 - Pedestrian protection airbag device and pedestrian protection device - Google Patents

Description

  The present invention relates to a pedestrian protection airbag device mounted on a hood of a vehicle and a pedestrian protection device including the pedestrian protection airbag device.

  In the hood airbag device (pedestrian protection airbag device) described in Patent Document 1 below, the airbag case is close to the vehicle rear side of the skeleton having a closed cross-sectional shape formed on the lower surface of the rear end portion of the hood. Are arranged. The airbag case is fastened and fixed to the lower surface of the skeleton portion at an attachment flange provided at the front end portion. When the air bag folded and accommodated in the air bag case is inflated and deployed by the gas from the inflator, the air bag is first pulled out to the upper side of the vehicle through a narrow gap between the hood and the wiper pivot. Thereafter, tear sewing provided on the airbag is cut, the airbag is inflated in the vehicle front-rear direction, and the upper surface of the rear end portion of the hood and the front surface of the lower end portion of the windshield are covered with the airbag.

  On the other hand, in the pedestrian protection airbag device described in Patent Document 2 below, the airbag that is folded and arranged on the lower surface side of the rear end portion of the hood is a resin attached to the lower surface of the rear end portion of the hood. It is covered with a cover body made of metal. The airbag is inflated and deployed toward the vehicle rear side by the gas from the inflator. During the inflation and deployment, the cover body is bent and deformed by the inflation pressure of the airbag, and the rear end of the hood is pushed up. In the inflated and deployed state of the airbag, the front surface of the lower end portion of the windshield is covered with the airbag main body portion extending in the vehicle width direction, and the left and right airbags extend obliquely rearward and upward from the left and right ends of the airbag main body portion. The front side of the left and right front pillars is covered by the pillar portion. Unlike the airbag described in Patent Document 1, the airbag is not provided with a portion that covers the upper surface of the rear end portion of the hood in the inflated and deployed state.

JP 2003-089333 A Japanese Patent Laid-Open No. 2005-178487

  In the airbag described in Patent Document 2, the front portion of the airbag body is inflated and deployed below the rear end of the hood. For this reason, when a pedestrian's head or the like comes into contact with the upper surface of the rear end portion of the hood, a reaction force from the airbag is applied to the rear end portion of the hood. Absorption performance may be reduced.

  In consideration of the above-described facts, an object of the present invention is to obtain a pedestrian protection airbag device and a pedestrian protection device that contribute to securing impact absorption performance due to deformation of a hood.

The pedestrian protection airbag device according to the invention described in claim 1 is disposed on the rear side of the vehicle with respect to the skeleton portion having a closed cross-sectional shape provided along the vehicle width direction on the lower surface side of the rear end portion of the hood. An airbag case fixed to the skeleton part, and housed in the airbag case, gas from the inflator is supplied to the inside and inflated and deployed to the rear side of the vehicle, and the lower end of the windshield and the left and right A pillars are an airbag main body portion covering said constitutes the airbag with the airbag body portion, said inflator and Ide pastern and the airbag main body, guides the gas into the air bag body portion, wherein in the inflated and deployed state The airbag main body is positioned on the vehicle rear side of the rear end of the upper wall portion of the airbag case by extending to the vehicle rear side below the rear end portion, and And a vertical dimension and the vehicle width direction dimension is small set have that the gas flow path portion in the inflated and deployed state than the airbag body portion, below the rear end portion, in the inflated and deployed state A region where the airbag is not present is provided .

  In the first aspect of the present invention, the airbag main body housed in the airbag case is connected to the inflator by the gas flow path portion. When this inflator is activated, the gas from the inflator is guided into the airbag body by the gas flow path, the airbag body is inflated and deployed toward the rear side of the vehicle, and the lower end of the windshield and the left and right A pillars are the airbag. Covered by the main body. In the inflated and deployed state of the airbag main body, the gas flow passage extends to the vehicle rear side below the rear end of the hood, so that the airbag main body is more than the rear end of the upper wall of the airbag case. Is also located on the vehicle rear side. Further, in this state, the gas flow path portion has a smaller vertical dimension (vertical expansion thickness) than the airbag main body portion. For this reason, when a pedestrian's head etc. collides with the upper part of the upper wall part of the airbag case at the rear end of the hood, in addition to the reaction force from the airbag case against the upper part Moreover, it can prevent or suppress that the reaction force from an airbag main-body part with large up-and-down expansion thickness is added. As a result, it is possible to contribute to securing shock absorbing performance due to deformation of the hood.

  A pedestrian protection airbag device according to a second aspect of the present invention is the pedestrian protection airbag device according to the first aspect, wherein the front end portion of the airbag main body portion is in contact with the rear end edge portion of the hood in the inflated and deployed state. ing.

  In the invention according to claim 2, in the inflated and deployed state of the airbag main body, the front end of the airbag main body is in contact with the rear edge of the hood, so that the airbag main body is not supported with the gas flow path as a fulcrum. It is possible to prevent or suppress the swinging.

  A pedestrian protection airbag device according to a third aspect of the present invention is the pedestrian protection airbag device according to the first or second aspect, wherein the pair of left and right gas flow path portions are provided separated in the vehicle width direction.

In the invention according to claim 3, since the airbag main body is supported by the pair of left and right gas flow paths spaced apart in the vehicle width direction in the inflated and deployed state of the airbag main body, the airbag main body is not prepared. Can be prevented or suppressed.
The pedestrian protection airbag device according to a fourth aspect of the present invention is the pedestrian protection airbag device according to any one of the first to third aspects, wherein the airbag is present below the rear end portion in the inflated and deployed state. The region where the airbag does not exist is configured to be wider than the region where the airbag is to be provided.

The pedestrian protection device according to the invention described in claim 5 operates with a hood having a skeleton portion having a closed cross-sectional shape along the vehicle width direction on the lower surface side of the rear end portion. The drive source which lifts the vehicle width direction both ends in an edge part, and the said airbag case arrange | positioned at the vehicle rear of the said skeleton part are fixed to the said skeleton part, The any one of Claims 1-4. A pedestrian protection airbag device.

In the invention according to claim 5 , since the pedestrian protection airbag device according to any one of claims 1 to 4 is provided, the above-described effects are exhibited. In addition, since both the left and right end portions of the rear end portion of the hood can be lifted by the drive source, a large deformation stroke to the lower side of the hood can be ensured. Thereby, the impact absorption performance by deformation | transformation of a hood can be improved.

  As described above, in the pedestrian protection airbag device and the pedestrian protection device according to the present invention, it is possible to contribute to securing impact absorption performance due to deformation of the hood.

It is a top view which shows the structure of the principal part of the pedestrian protection apparatus which concerns on 1st Embodiment of this invention. It is an expanded sectional view which expands and shows the cut surface along the F2-F2 line of FIG. It is an expanded sectional view which expands and shows the cut surface along the F3-F3 line of FIG. FIG. 3 is a cross-sectional view corresponding to FIG. 2 showing a state before the airbag of the pedestrian protection airbag apparatus is inflated and deployed in the pedestrian protection apparatus. It is a perspective view which shows the front part of the motor vehicle carrying the pedestrian protection apparatus. It is sectional drawing which looked at the surrounding structure containing the pop-up apparatus with which the pedestrian protection apparatus is provided from the vehicle width direction. It is a top view corresponding to Drawing 1 showing the composition of the principal part of the pedestrian protection device concerning a 2nd embodiment of the present invention.

  A pedestrian protection airbag device 10 and a pedestrian protection device 12 according to an embodiment of the present invention will be described with reference to FIGS. It should be noted that an arrow FR, an arrow UP, and an arrow IN that are appropriately described in each figure indicate the front direction (traveling direction), the upward direction, and the inner side in the vehicle width direction of the vehicle. Hereinafter, when simply using the front-rear, left-right, and up-down directions, unless otherwise specified, the front-rear direction of the vehicle, the left-right direction of the vehicle left-right direction (vehicle width direction), and the up-down direction of the vehicle are indicated To do.

(Constitution)
As FIG. 5 shows, the food | hood 18 is provided in the upper surface side of the engine room 16 (power unit room) of the motor vehicle 14 (vehicle) by which the pedestrian protection apparatus 12 is mounted. A windshield glass 20 that is a windshield is disposed behind the hood 18 in the vehicle. The windshield glass 20 is inclined obliquely upward and rearward of the vehicle, and the lower end 20A faces the rear end 18A of the hood 18 from the rear of the vehicle.

  The front end of the hood 18 is normally locked by a hood lock (not shown). Also, hood hinges 22 (see FIG. 6) are respectively disposed below both ends in the vehicle width direction at the rear end of the hood 18. These hood hinges 22 are hinge base 24 fixed to the vehicle body, the front end portion is fixed to the rear end portion 18A of the hood 18 and the rear end portion is pin-coupled to the hinge base 24, and swings around the coupling point. And a hinge arm 26 that is made possible.

  Further, an actuator 28 (drive source: see FIGS. 5 and 6) that constitutes a pop-up hood device together with the hood hinge 22 is disposed below both ends in the vehicle width direction of the rear end portion 18A of the hood 18. . These actuators 28 (lifters) are fixed to the vehicle body, and are configured to raise the rod 30 at the time of a collision with a pedestrian to lift both ends in the vehicle width direction of the rear end of the hood 18. These actuators 28 are electrically connected to a controller (ECU) described later. The configurations of the hood hinge 22 and the actuator 28 are not limited to the above and can be changed as appropriate.

  As shown in FIGS. 2 to 4, the hood 18 is disposed outside the vehicle and forms a design surface of the hood 18, and is disposed on the engine room 16 side to reinforce the hood outer panel 32. And a hood inner panel 34. The outer periphery of the hood outer panel 32 and the hood inner panel 34 are coupled by hemming.

  The rear end portion of the hood inner panel 34 is formed with a bulging portion that bulges downward in the vehicle and extends in the vehicle width direction, thereby forming a skeleton portion 19 extending in the vehicle width direction. The skeleton portion 19 has a closed cross-sectional shape when viewed from the vehicle width direction. The skeleton part 19 is formed at a position offset from the rear end edge part 18A1 of the hood 18 toward the vehicle front side. An air bag module 38 that constitutes a main part of the pedestrian protection air bag device 10 (hereinafter simply referred to as “air bag device 10”) is disposed on the lower surface side of the hood 18 behind the skeleton portion 19. Yes.

  As shown in FIGS. 1 to 4, the airbag module 38 includes an airbag case 40 (module case) formed in a long, substantially box shape whose longitudinal direction is the vehicle width direction. Inside the airbag case 40, a pedestrian protecting airbag 42 (hood airbag) is stored in a folded state, and gas is blown into the airbag 42 upon collision with a pedestrian. A pair of left and right inflators 46 to be supplied are housed.

  The airbag case 40 includes a case main body portion 40A formed in a rectangular hollow body elongated in the vehicle longitudinal direction when viewed from the vehicle width direction, and a vehicle front side (framework) from the lower end portion of the front end portion of the case main body portion 40A. And a fixed portion 40 </ b> B extending to the lower surface side of the portion 19. The airbag case 40 is attached to the hood 18 by fastening and fixing the fixing portion 40 </ b> B to the bottom wall 19 </ b> A of the skeleton portion 19 by the bolt 48 and the weld nut 50.

  In the case main body 40A, the upper and lower wall portions are arranged in parallel or substantially parallel to each other, the rear wall portion is arranged at a right angle or a substantially right angle with respect to the upper and lower wall portions, and the front wall portion is the rear wall. It arrange | positions so that it may approach, so that it goes upwards with respect to a part. In FIGS. 4 to 6, reference numeral 40 </ b> A <b> 1 is attached to the upper wall (upper wall) of the case body 40 </ b> A. In addition, a tier portion 52 that is thinned by forming a V-shaped groove is formed at the upper corner portion (the rear end of the upper wall portion 40A1) of the rear end portion of the case main body portion 40A. . The tier portion 52 has lower strength and rigidity than other portions (general portions) of the case main body portion 40A.

  On the other hand, the left and right inflators 46 are so-called cylinder-type inflators, and are provided side by side in the vehicle width direction on the front end side in the case main body portion 40A so that the axial direction is substantially along the vehicle width direction. A mounting bracket 54 made of a metal plate is joined to each of the left and right inflators 46. These mounting brackets 54 extend to the lower surface side of the skeleton part 19 and are fastened and fixed to the bottom wall 19A of the skeleton part 19 by the bolts 48 and the weld nut 50 described above. As a result, the left and right inflators 46 are fixed to the skeleton 19 of the hood 18 via the mounting bracket 54.

  A squib (ignition device) (not shown) is disposed at one end in the axial direction of the inflator 46 (here, the inner end in the vehicle width direction). The inflator 46 is filled with a gas generating agent that generates a large amount of gas by combustion, and is generated when the coolant and the gas generating agent for cooling the generated high-temperature gas are combusted. A filter or the like for removing debris is accommodated. The inflator 46 is a type of inflator that uses a gas generating agent, but an inflator in which a high-pressure gas is sealed may be used. Further, a gas ejection part for ejecting the gas generated inside the inflator 46 is provided at the other end part in the axial direction of the inflator 46 (here, the outer end part in the vehicle width direction).

  The left and right inflators 46 are electrically connected to a controller (ECU) (not shown) disposed at the center of the vehicle body floor. The controller is electrically connected to a collision detection sensor (not shown) or a pre-crash sensor (not shown) disposed on a front bumper (not shown) of the automobile 14. As the collision detection sensor, for example, a chamber system in which a long chamber and a pressure sensor are disposed along the front bumper on the back surface side of the front bumper, an optical fiber system in which an optical fiber is disposed, and the like are applicable. As the collision detection sensor, for example, a pre-crash sensor that predicts a collision with a collision object such as a pedestrian using a millimeter wave radar or a stereo camera can be applied.

  On the other hand, the airbag 42 is formed in a bag shape by, for example, sewing the outer peripheral portions of two base fabrics. The airbag 42 is housed in the airbag case 40 in a state of being folded by a predetermined folding method such as bellows folding or roll folding, and is inflated and deployed to the rear side of the vehicle by gas ejected from the left and right inflators 46. To do.

  The airbag 42 includes an airbag main body 42A (main chamber) for protecting pedestrians, and a pair of left and right gas flow path portions 42B that connect the airbag main body 42A and the left and right inflators 46. It is configured. The airbag main body 42A is formed in a long tube shape, and extends in the vehicle width direction in the inflated and deployed state, and left and right extended in the longitudinal orthogonal direction from both longitudinal ends of the laterally extended portion 42A1. It is comprised by a pair of side part 42A2, and has comprised substantially C shape (substantially U shape). The gas flow path portion 42B extends from the middle portion in the longitudinal direction of the laterally extending portion 42A1 to the opposite side (substantially opposite direction) to the left and right side portions 42A2, and is separated from the longitudinal direction of the laterally extending portion 42A1. Is provided.

  The left and right gas flow path portions 42B have respective open ends that are bent toward the sides approaching each other, and the other ends in the axial direction of the left and right inflators 46 (on the side where the gas ejection portion is provided) from each opening. (End part) is inserted in the front-end | tip part of the gas flow path part 42B on either side. The left and right gas flow path portions 42B are fixed to the left and right inflators 46 by a fixing tool such as a band. When the left and right inflators 46 are operated, the gas ejected from the left and right inflators 46 is guided into the airbag main body 42A by the left and right gas flow path portions 42B. Thereby, the airbag 42 is inflated and deployed from the rear end edge portion 18A1 of the hood 18 and the lower end portion 20A of the windshield glass 20 to the vehicle rear side while the airbag case 40 is torn up and down at the tier portion 52. To do.

  When the airbag 42 is inflated and deployed, the left and right gas flow path portions 42B extend to the vehicle rear side below the rear end portion 18A of the hood 18, and the lower end portion 20A of the windshield glass 20 and the airbag main body portion 42A The left and right A pillars 21 (front pillars: not shown in FIG. 5) are covered from the vehicle front side. Specifically, the laterally extending portion 42A1 of the airbag main body portion 42A extends in the vehicle width direction along the rear end portion 18A of the hood 18, and the front surface of the lower end portion 20A of the windshield glass 20 is extended by the laterally extending portion 42A1. Covered. Further, left and right side portions 42A2 extend obliquely upward and rearward of the vehicle from both ends of the airbag main body portion 42A in the vehicle width direction, and the front surfaces of the left and right A pillars 21 are covered by these side portions 42A2.

  Here, in this embodiment, as shown in FIG. 2, the left and right gas flow path portions 42B have sufficient vertical dimension (up and down inflated thickness) in the inflated and deployed state as compared with the airbag main body portion 42A. Is set to a small value. Further, the left and right gas flow path portions 42B are configured such that the entire airbag main body portion 42A that is inflated and deployed is on the vehicle rear side with respect to the rear end of the upper wall portion 40A1 of the airbag case 40 (the vehicle is more than the broken line B1 shown in FIG. The length dimension is set so as to be located on the rear side. Therefore, in the inflated and deployed state of the airbag 42, only the left and right gas flow path portions 42B among the components of the airbag 42 are disposed on the vehicle front side of the rear end of the upper wall portion 40A1. Note that the rear end of the upper wall portion 40A1 coincides or substantially coincides with the rear end of the arrangement region of the airbag case 40 in a normal state (see FIG. 4) in the vehicle front-rear direction. In the present embodiment, the length dimension is such that the inflated and deployed airbag main body 42A is positioned on the vehicle rear side with respect to the rear end of the arrangement region (the vehicle rear side with respect to the broken line B2 shown in FIG. 4). Is set.

  Further, as shown in FIG. 1, in the airbag 42 in the inflated and deployed state, the front end portion of the laterally extending portion 42A1 (the front end portion of the airbag main body portion 42A) is located with respect to the rear end edge portion 18A1 of the hood 18. The length dimension of the gas channel part 42B etc. are set so that it may contact from the vehicle back. In the present embodiment, of the front end portion of the laterally extending portion 42A1, at least the middle portion in the vehicle width direction is the rear end edge of the hood 18 at a portion having a length in the vehicle width direction or a plurality of locations separated in the vehicle width direction. It is configured to contact the portion 18A1.

  Further, as shown in FIG. 1, the left and right gas flow path portions 42B are set to have sufficiently small dimensions (left and right inflated widths) in the vehicle width direction in the inflated and deployed state as compared with the airbag main body portion 42A. Yes. For this reason, in the inflated and deployed state of the airbag 42, the region where the airbag 42 is not present (see the one-dot chain line E in FIG. 1) is lower than the region where the airbag 42 is present below the rear end 18A of the hood 18. Is configured to be sufficiently wide.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  In a state before colliding with a pedestrian, the actuator 28 and the airbag device 10 are maintained in an inoperative state. That is, as shown by a two-dot chain line in FIG. 6, the rear end portion 18A of the hood 18 is not lifted, and the airbag 42 is folded into the airbag case 40 as shown in FIG. It is stored in a state.

  From this state, when the automobile 14 collides with a pedestrian, the collision detection sensor (not shown) provided on the front bumper detects that the vehicle 14 has collided with the pedestrian. The same applies when a collision with a pedestrian is predicted using a pre-crash sensor or a stereo camera. As a result, the actuator 28 is actuated by a controller (not shown), and the rear end portion 18A of the hood 18 is lifted up to a predetermined height as shown in FIGS. 2 and 3 and as shown by a solid line in FIG. (Pops up).

  When the lift amount of the rear end portion 18A of the hood 18 reaches a predetermined amount, the left and right inflators 46 of the airbag device 10 are operated by a controller (not shown). For this reason, gas is ejected from the gas ejection portions of the left and right inflators 46, and the gas is supplied into the airbag main body portion 42A through the left and right gas flow path portions 42B. As a result, the airbag 42 starts to expand in the airbag case 40, and the tensile load applied to the tier portion 52 of the airbag case 40 increases. Then, when the tensile load applied to the tier portion 52 reaches a predetermined value, the tier portion 52 breaks and the airbag case 40 expands up and down in a rear-opening manner as shown in FIGS.

  Thereby, the airbag 42 is inflated and deployed from the rear end edge portion 18A1 of the hood 18 and the lower end portion 20A of the windshield glass 20 to the vehicle rear side. In a state in which the airbag 42 is inflated and deployed, the left and right gas flow path portions 42B extend to the vehicle rear side below the rear end portion 18A of the hood 18, and the lower end portion 20A of the windshield glass 20 and the airbag main body portion 42A The left and right A pillars 21 are covered from the front side of the vehicle (see FIGS. 1 to 3 and FIG. 5).

  Here, as shown in FIG. 2, the gas flow path portion 42B is set to have a sufficiently small vertical dimension (vertical expansion thickness) in the inflated and deployed state as compared to the airbag main body portion 42A. Yes. Further, as shown in FIGS. 1 to 3, the gas flow passage portion 42 </ b> B is configured such that the entirety of the inflated airbag main body portion 42 </ b> A is behind the rear end of the upper wall portion 40 </ b> A <b> 1 of the airbag case 40. The length dimension is set to be located at Thereby, when a pedestrian's head etc. collide with the upper part of upper wall part 40A1 of the airbag case 40 in the rear-end part 18A of the food | hood 18, with respect to the said upper part, it is from the airbag case 40. In addition to the reaction force, a reaction force (including the deployment reaction force of the airbag main body portion 42A and the inertial force corresponding to the mass of the air bag main body portion 42A) from the airbag main body portion 42A having a large upper and lower inflated thickness is applied. Can be prevented or suppressed. As a result, it is possible to contribute to securing the shock absorbing performance due to the deformation of the rear end portion 18A of the hood 18, so that both the pedestrian protection performance by the hood 18 and the pedestrian protection performance by the airbag 42 are satisfactorily achieved. Can do.

  Further, in the present embodiment, as shown in FIGS. 1 to 3, the gas flow passage portion 42 </ b> B has the airbag main body portion 42 </ b> A inflated and deployed closer to the vehicle rear side than the rear end edge portion 18 </ b> A <b> 1 of the hood 18. The length dimension is set to be located. Thus, the rear end portion 18A of the hood 18 can be prevented from receiving a reaction force from the airbag main body portion 42A, and thus the above-described effect can be improved. In particular, in the region given the alternate long and short dash line E in FIG. 1, since the airbag 42 does not exist below the rear end portion 18A of the hood 18, the shock absorption performance due to the deformation of the rear end portion 18A of the hood 18 is ensured satisfactorily. can do.

  Further, in the present embodiment, the airbag 42 is formed so that the front end portion of the laterally extending portion 42A1 of the airbag main body portion 42A is in contact with the rear end edge portion 18A1 of the hood 18 in the inflated and deployed state. Thereby, it can prevent or suppress that the airbag main body part 42A rocks carelessly by using the left and right gas flow path parts 42B as fulcrums. Moreover, the airbag 42 has a pair of left and right gas flow path portions 42B that are separated in the vehicle width direction. Since the airbag main body portion 42A is supported by these gas flow path portions 42B, inadvertent swinging of the airbag main body portion 42A can be more effectively prevented or suppressed.

Further, in the present embodiment, at the time of a pedestrian collision, both end portions in the vehicle width direction of the rear end portion 18A of the hood 18 are lifted by the actuator 28, so that a large deformation stroke to the lower side of the hood 18 can be ensured. it can. Thereby, the impact absorption performance due to the deformation of the hood 18 can be improved.

<Second Embodiment>
FIG. 7 is a plan view showing the configuration of the main part of the pedestrian protection device 60 according to the second embodiment of the present invention. This embodiment is different from the first embodiment in that the airbag 64 of the pedestrian protection airbag device 62 includes only one gas flow path portion 42B. Other configurations are the same as those in the first embodiment. In this embodiment, the gas flow path portion 42B extends from the central portion in the longitudinal direction of the laterally extending portion 42A1. The gas channel portion 42B has a distal end portion (front end portion) branched toward both longitudinal sides of the laterally extending portion 42A1, and the distal end portion is connected (fixed) to the left and right inflators 46.

In this embodiment, when the airbag 64 is in an inflated and deployed state, a region where the airbag 64 does not exist below the rear end portion 18A of the hood 18 (see the one-dot chain line E in FIG. 7) is wider than that in the first embodiment. Since it can be set, it is preferable from the viewpoint of improving the impact absorption performance due to deformation of the hood 18. In this embodiment, since the gas from the inflator 46 is guided into the airbag main body 42A by one gas flow path portion 42B, the thickness of the gas flow path portion 42B is larger than that of the first embodiment. Therefore, for example, it is preferable to set a tether or a seam in the gas flow path portion 42B so that the upper and lower expansion thicknesses of the gas flow path portion 42B do not increase.

<Supplementary explanation of the embodiment>
In the above-described embodiment, the front end portion of the laterally extending portion 42A1 of the airbag main body portion 42A is in contact with the rear end edge portion 18A1 of the hood 18 when the airbag 42 is inflated and deployed. This is not a limitation. For example, in the inflated and deployed state of the airbag, a part of the front end portion of the airbag main body is disposed below the rear end of the hood on the vehicle rear side of the rear end of the upper wall portion of the airbag case. It may be configured.

  Moreover, in the said embodiment, although it was set as the structure provided with the actuator 28 which lifts the vehicle width direction both ends in the rear-end part 18A of the hood 18, the invention which concerns on Claims 1-3 is not restricted to this, An actuator is not limited to this. The configuration may be omitted.

  Moreover, in the said embodiment, it was set as the structure provided with the left-right paired inflator 46, However, The invention which concerns on Claims 1-4 is not restricted to this, The number of inflators can be changed suitably, A configuration having only one inflator may be used. In that case, in the invention described in claim 3, for example, inflators each having gas ejection portions at both ends in the axial direction (both ends in the vehicle width direction) are employed, and the pair of left and right gas flow path portions are arranged at both ends in the axial direction of the inflator. What is necessary is just to connect to each part.

  In addition, the present invention can be implemented with various modifications without departing from the scope of the invention. It goes without saying that the scope of rights of the present invention is not limited to the above embodiment.

10 Pedestrian Protection Airbag Device 12 Pedestrian Protection Device 14 Car (Vehicle)
18 Hood 18A Rear end 18A1 Rear end edge 19 Skeleton 20 Windshield glass (windshield)
21 A pillar 20A Lower end 28 Actuator (drive source)
DESCRIPTION OF SYMBOLS 40 Airbag case 40A1 Upper wall part 42A Airbag main-body part 42B Gas flow path part 46 Inflator 60 Pedestrian protection apparatus 62 Pedestrian protection airbag apparatus

Claims (5)

An airbag case disposed behind the vehicle with respect to the skeleton portion having a closed cross-sectional shape provided along the vehicle width direction on the lower surface side of the rear end portion of the hood, and fixed to the skeleton portion;
An airbag main body which is housed in the airbag case, is supplied with gas from the inflator and is inflated and deployed to the vehicle rear side, and covers the lower end of the windshield and the left and right A pillars;
The Configure airbag with the airbag body portion, said inflator and said and Ide tie the airbag body portion, guides the gas into the air bag body portion, wherein in the inflated and deployed state, under the rear end portion The airbag body portion is positioned on the vehicle rear side with respect to the rear end of the upper wall portion of the airbag case by extending to the vehicle rear side, and the upper and lower sides in the inflated and deployed state as compared with the airbag body portion. and a gas flow passage section dimension and the vehicle width direction dimension that is smaller,
Equipped with a,
A pedestrian protection airbag device in which a region where the airbag does not exist in the inflated and deployed state is provided below the rear end portion .   The pedestrian protection airbag device according to claim 1, wherein in the inflated and deployed state, a front end portion of the airbag main body portion is in contact with a rear end edge portion of the hood.   The pedestrian protection airbag device according to claim 1 or 2, wherein the pair of left and right gas flow path portions are provided apart from each other in the vehicle width direction. 4. The structure according to claim 1, wherein in the inflated and deployed state, a region where the airbag is not present is wider than a region where the airbag is present below the rear end portion. The pedestrian protection airbag device according to claim 1. A hood provided with a skeleton portion having a closed cross-sectional shape along the vehicle width direction on the lower surface side of the rear end portion,
A drive source that lifts both ends in the vehicle width direction at the rear end of the hood by operating;
The pedestrian protection airbag device according to any one of claims 1 to 4, wherein the airbag case disposed on the vehicle rear side of the skeleton portion is fixed to the skeleton portion.
A pedestrian protection device.