Vehicle body front structure

Abstract

To reduce a burden on a pedestrian or the like when a collision with the pedestrian or the like occurs from a vehicle front side.SOLUTION: A vehicle front structure includes: a front hood part 10 which is provided with a front hood opening / closing part 20 allowing the front hood part 10 to be opened and closed and be raised and lowered in a vehicle vertical direction by lifting a vehicle front side; a front airbag storage part 200 which includes a storage lid part 220 having a rotation shaft OR facing in a vehicle front-rear direction and is opened at a vehicle width direction inner side; a front airbag 300 which is stored in the front airbag storage part 200 and is inflated and deployed to a vehicle lower side of the front hood part 10 when a collision occurs from the vehicle front side; and an inflator IF which supplies gas to the front airbag 300 when the collision occurs from the vehicle front side. The front airbag 300 includes at least: a first gas chamber 310 which has a spherical shape and is supplied with the gas from the inflator IF; and a second gas chamber 320 which has a columnar shape and is connected to a vehicle rear side of the first gas chamber 310 so as to allow the gas chambers to communicate with each other.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a vehicle front body structure. [Background technology]

[0002] When a collision occurs in front of a vehicle with a pedestrian or a bicyclist (hereinafter referred to as a pedestrian, etc.), the pedestrian, etc. may fall onto the upper side of the front hood of the vehicle. Therefore, in the vehicle front body structure, it is necessary to reduce the impact that the front hood gives to a pedestrian or the like when the pedestrian or the like falls onto the front hood.

[0003] As a technology to address the above-described problems, a rear movement mechanism for a front hood has been disclosed in which the rear end of a front hood provided at the front of the vehicle body is supported on the vehicle body side by a hinge so as to be able to open and close, and the front hood is lifted by an actuator.Technology relating to a hood pop-up structure has been disclosed (see, for example, Patent Document 1), in which the rear end of a pop-up link is rotatably connected to an upper hinge provided on the hinge, the hood is rotatably connected to the front end of the pop-up link, and the actuator is connected between the upper hinge and the hood. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-147074 Summary of the Invention [Problem to be solved by the invention]

[0005] The hood pop-up structure in the technology described in Patent Document 1 lifts the rear end of the hood when the vehicle collides with a pedestrian or other object, thereby absorbing the impact on the pedestrian or other object with the hood.

[0006] However, the above technology has the problem that when a pedestrian or the like climbs onto the lifted front hood, there is a risk that the pedestrian or the like may move on the front hood and interfere with the A-pillar of the vehicle.

[0007] Therefore, the present invention has been made in consideration of the above-mentioned problems, and aims to provide a front body structure that reduces the burden on pedestrians, etc. when a collision with a pedestrian, etc. occurs from the front of the vehicle. [Means for solving the problem]

[0008] One or more embodiments of the present invention propose a vehicle body front structure comprising: a front hood section provided at the front of a cabin of a vehicle and having an opening / closing section that can be opened and closed by lifting the front of the vehicle and can be raised and lowered in the vertical direction of the vehicle; a front airbag storage section provided below the opening / closing section and having a storage lid on the upper side of the vehicle with a rotation axis facing the fore-and-aft direction of the vehicle and open on the inside in the vehicle width direction; a front airbag stored in the front airbag storage section that inflates and deploys below the front hood section when a collision occurs from the front of the vehicle; and an inflator that supplies gas to the front airbag when a collision occurs from the front of the vehicle, wherein the front airbag has at least a spherical first air chamber to which gas is supplied from the inflator, and a cylindrical second air chamber that is connected to the vehicle rear side of the first air chamber and communicates with the first air chamber. [Effects of the Invention]

[0009] According to one or more embodiments of the present invention, when a collision occurs between a vehicle and a pedestrian or the like from the front side, the burden on the pedestrian or the like can be reduced. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic view of a vehicle front body structure according to an embodiment of the present invention, viewed from above the vehicle. [Figure 2]2 is a cross-sectional view taken along line AA in FIG. 1, showing a state in which a front hood is closed in the vehicle front body structure according to the embodiment of the present invention. [Figure 3] 3 is an enlarged cross-sectional view of a portion B shown in FIG. 2 in the front hood opening / closing portion of the vehicle body front structure according to the embodiment of the present invention. [Figure 4] 1A and 1B are diagrams showing a front airbag storage section of a vehicle front structure according to an embodiment of the present invention, in which (a) is a side view seen from the inside in the vehicle width direction, (b) is a plan view seen from above the vehicle, and (c) is a front view seen from the vehicle travel direction. [Figure 5] 1A and 1B are diagrams showing the front airbag portion of a vehicle front body structure according to an embodiment of the present invention, in which (a) is a cross-sectional view showing the state in which the front airbag portion is stored in a front airbag storage portion, and (b) is a cross-sectional view showing the state in which the front airbag portion is inflated and deployed. [Figure 6] 5A to 5B are cross-sectional views showing, in time sequence, the movement of the vehicle body front structure according to an embodiment of the present invention when a pedestrian or the like collides with the vehicle from the vehicle travel direction. [Figure 7] 1 is a schematic view seen from above the vehicle showing a state in which a front airbag portion is inflated and deployed when a pedestrian or the like collides with the vehicle from the vehicle travel direction in a vehicle front body structure according to an embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] 1 to 7, a vehicle body front structure 1 according to this embodiment will be described below. Note that the arrow FR shown as appropriate in the drawings indicates the vehicle traveling direction of the vehicle V, the arrow UP indicates the upper side of the vehicle V, and the arrow RH indicates the right side when facing the vehicle traveling direction. Furthermore, in the following description, when the up / down, front / rear, and left / right directions are used, they refer to the up / down direction when facing the vehicle traveling direction, the front / rear direction with the vehicle traveling direction as the front, and the left / right direction when facing the vehicle traveling direction, unless otherwise specified.

[0012] <Embodiment> The configuration of a vehicle body front structure 1 according to this embodiment will be described with reference to FIGS. 1 to 5. FIG.

[0013] <About Vehicle V> The vehicle V is, for example, an electric vehicle (EV) using a vehicle drive motor in the drive unit DU as a drive source. Note that the vehicle V may also be, for example, a hybrid electric vehicle (HEV) having multiple drive sources such as an engine and a power unit, or an internal combustion vehicle having an internal combustion engine.

[0014] (Regarding front body structure 1) As shown in Figure 1, the vehicle V has a cabin CA as the interior of the vehicle where an occupant P sits, configured on the rear side of the toe board section 110, and a vehicle front structure 1 configured on the front side of the toe board section 110. A-pillars AP are provided on both sides of the windshield in the vehicle width direction at the front of the cabin CA. The lower sides of the A-pillars AP are connected to the toe board 110 or the upper sides of the upper frame 150, and the upper sides of the A-pillars AP are connected to the roof of the vehicle V.

[0015] The vehicle body front structure 1 is configured to include a front trunk section 30, a frame section 100, and a front airbag storage section 200. An openable and closable front hood section 10 is provided on the upper side of the vehicle of the vehicle body front structure 1. A front hood opening and closing section 20 that enables the front hood section 10 to be opened and closed is provided on the rear side of the vehicle of the front hood section 10. A front grille portion FG is provided on the vehicle front side of the vehicle front body structure 1 in the vertical direction of the vehicle. The front grille portion FG is formed of a material such as resin. The front grille portion FG is fixed to the frame portion 100 on the lower front side of the vehicle of the front hood portion 10 so as to cover the frame portion 100. A drive unit DU including a power unit and an inverter is configured on the vehicle rear side of the front vehicle body structure 1. The power unit is a drive device provided with a vehicle drive motor (not shown) that drives the front wheels FT, a transmission, a clutch, a drive shaft, etc. The inverter generates the high voltage required to drive the power unit.

[0016] (Regarding front hood section 10) The front hood portion 10 is disposed so as to cover the upper side of the vehicle of the vehicle body front structure 1. The front hood section 10 is provided with a front hood opening / closing section 20, which is provided on the front side of the cabin CA of the vehicle V and serves as an opening / closing section that allows the front hood section 10 to be opened and closed by lifting the front side of the vehicle and also allows the front hood section 10 to be raised and lowered in the vertical direction of the vehicle. The front hood section 10 is configured to be opened and closed by raising and lowering the front side of the vehicle of the front hood section 10 using the front hood opening / closing section 20 as a fulcrum. 2, a front hood fastening part EG is provided on the underside of the front portion of the vehicle of the front hood part 10. The front hood fastening part EG is provided by, for example, connecting an engaging member formed into a substantially U-shape from a metal rod or the like to the underside of the front portion of the vehicle of the front hood part 10. The front hood fixing portion EG engages with a front hood lock portion LK provided on the front end cross member 140 when the front hood portion 10 is closed.

[0017] (Regarding the front hood opening / closing part 20) The front hood opening / closing section 20 opens and closes the front hood section 10 in the vertical direction of the vehicle, and also enables the front hood section 10 to be raised and lowered in the vertical direction of the vehicle. The front hood opening / closing section 20 is provided below the rear of the front hood section 10 and on the outer side in the vehicle width direction. 3, the front hood opening / closing portion 20 includes a first hinge 21 and a second hinge 22. The first hinge 21 and the second hinge 22 are flat plates made of metal or the like. The first hinge 21 and the second hinge 22 are provided with hinge axes HA1 to HA3.

[0018] Specifically, for example, the first hinge 21 extends in the front-rear direction of the vehicle and is bent toward the upper side of the vehicle at the rear side of the vehicle. The first hinge 21 has a hinge axis HA1 on the upper rear side of the vehicle and a hinge axis HA2 on the front side of the vehicle. The first hinge 21 has a hinge axis HA1 that is the same rotation axis as the opening / closing axis TR of the front hood section 10. The first hinge 21 is rotatably connected to the front hood section 10 at the hinge axis HA1. The first hinge 21 is rotatably connected to the second hinge 22 at the hinge axis HA2. The vehicle undersides of the first hinge 21 and the second hinge 22 abut against the storage lid portion 220 of the front airbag storage portion 200. As the vehicle undersides of the first hinge 21 and the second hinge 22 abut against the storage lid portion 220, movement of the first hinge 21 and the second hinge 22 toward the vehicle underside is restricted.

[0019] The second hinge 22 extends in the front-to-rear direction of the vehicle and is bent upward at the rear of the vehicle. The second hinge 22 is provided with a hinge axis HA2 on the front side of the vehicle and a hinge axis HA3 on the rear side of the vehicle. The second hinge 22 is rotatably connected to the first hinge 21 at a hinge axis HA2. The second hinge 22 is rotatably fixed to the upper frame 150 via a hinge axis HA3. (Regarding the front trunk section 30) The front trunk section 30 is a storage box made of resin or other material for storing luggage, etc. The interior of the front trunk section 30 is formed into a recessed shape with an opening on the upper side of the vehicle. As shown in Figures 1 and 2, the front trunk section 30 is placed on the vehicle upper side of the front side frame 120, on the vehicle rear side of the front end cross member 140 and inside the front side frame 120 and upper frame 150 in the vehicle width direction.

[0020] (Regarding the frame portion 100) The frame portion 100 forms the skeleton of the vehicle V in the vehicle body front structure 1. As shown in FIG. 2, the frame portion 100 includes a toe board portion 110, a front side frame 120, a front frame 130, a front end cross member 140, and an upper frame 150. A bumper beam BP extending in the vehicle width direction is provided at the front of the vehicle.

[0021] The toe board portion 110 is erected in the vehicle up-down direction at the vehicle front side of the cabin CA, and forms a partition wall that separates the cabin CA from the vehicle body front structure 1. The toe board portion 110 is made of metal or the like.

[0022] The front side frames 120 extend in the front-rear direction of the vehicle on both sides in the vehicle width direction. The front side frames 120 are made of metal or the like and have a substantially rectangular closed cross section. The front side frame 120 is joined to the toe board portion 110 at the rear end of the vehicle by welding or the like. The front side frame 120 is joined to the front frame 130 at the front end of the vehicle.

[0023] The front frame 130 has a substantially rectangular closed cross section, and extends substantially in the vehicle up-down direction on both sides of the vehicle V in the vehicle width direction. The front frame 130 is connected to the front side frame 120 on the vehicle lower side, and to the upper frame 150 on the vehicle upper side. A front end cross member 140 is connected to the upper side of the vehicle of the front frame 130. A bumper beam BP, which extends in the vehicle width direction at the front lower part of the vehicle, is connected to the lower side of the vehicle of the front frame 130.

[0024] The front-end cross member 140 has a generally rectangular closed cross section and extends in the vehicle width direction at the front upper part of the vehicle. The front-end cross member 140 is made of a material such as metal. The front-end cross member 140 is connected to the upper frame 150 on both sides of the front-end cross member 140 in the vehicle width direction, and is connected to the front frame 130 on the vehicle lower surface of the front-end cross member 140. A front hood locking portion LK is provided in the center of the front end cross member 140 in the vehicle width direction, and fixes the front hood portion 10 to the front end cross member 140 when the front hood portion 10 is closed. When the front hood portion 10 is closed, the front hood locking portion LK is engaged with a front hood fixing portion EG provided on the front hood portion 10.

[0025] The upper frames 150 are provided on both sides in the vehicle width direction above the front side frames 120 and extend in the front-rear direction of the vehicle. The upper frames 150 are made of metal or the like and have a substantially rectangular closed cross section. The upper frame 150 is connected to the toe board portion 110 at the rear side of the vehicle, and is connected to the front frame 130 at the front side of the vehicle. A front hood opening / closing section 20 and a front airbag storage section 200 are fixed to the inside of the upper frame 150 at the rear of the vehicle.

[0026] (Regarding the front airbag storage area 200) 3, the front airbag storage compartment 200 is provided below the front hood opening / closing section 20, and has a storage lid 220 on the upper side of the vehicle, the storage lid 220 having a rotation axis OR facing in the longitudinal direction of the vehicle, and is open on the inner side in the vehicle width direction. A front airbag 300 is stored inside the front airbag storage compartment 200. The front airbag storage compartment 200 is a storage box made of resin, metal, or other material and has openings on the upper side of the vehicle and on the right side in the vehicle width direction. A storage lid 220 is provided on the upper side of the vehicle. The front airbag storage compartment 200 is fixed to the inner side of the upper frame 150 in the vehicle width direction. An inflator IF is provided below the front airbag storage portion 200 of the vehicle.

[0027] As shown in Figures 4(a) to 4(c), the front airbag storage section 200 includes a storage unit 210 and a storage lid section 220. Inside the front airbag storage section 200, a front airbag 300 is stored.

[0028] Storage unit 210 is made of a material such as resin and has long sides in the fore-and-aft direction when viewed from above the vehicle, with walls provided in the fore-and-aft direction, below the vehicle, and on the outside in the vehicle width direction, and with openings provided on the top side and inside in the vehicle width direction. A storage lid 220 is provided on the upper side of storage unit 210.

[0029] The storage lid portion 220 rotates about a rotation axis OR that faces the vehicle longitudinal direction on the outer side of the front airbag storage portion 200 in the vehicle width direction, and the inner side in the vehicle width direction opens toward the upper side of the vehicle. The storage lid portion 220 is a flat plate made of a material such as resin and formed into a substantially rectangular shape with long sides extending in the front-to-rear direction of the vehicle when viewed from above the vehicle.

[0030] (For front airbag 300) As shown in FIG. 4, the front airbag 300 is stored inside the front airbag storage section 200, and when a collision occurs with the vehicle V, the front airbag 300 inflates and deploys toward the underside and rear of the vehicle of the front hood section 10. The front airbag 300 includes at least a first air chamber 310 as a first air chamber having a spherical shape to which gas is supplied from an inflator IF, and a second air chamber 320 as a second air chamber having a cylindrical shape that is connected to the first air chamber 310 on the rear side of the vehicle and communicates with the air chamber. Between the first air chamber 310 and the second air chamber 320, an air chamber joint 330 is provided as a flow path for sending gas released from the inflator IF from the first air chamber 310 to the second air chamber 320.

[0031] The front airbag 300 is formed from a member such as a base fabric material, and as shown in FIGS. 5(a) and 5(b), has a plurality of air chambers that are connected to each other. As shown in FIG. 5(a), the front airbag 300 is stored in the front airbag storage section 200 in a folded state.

[0032] The first air chamber 310 is connected to an inflator IF, and when a collision occurs in the vehicle V, gas is supplied from the inflator IF to the first air chamber 310. The first air chamber 310 is formed as a substantially spherical air chamber. The first air chamber 310 is stored in the front airbag storage section 200 on the vehicle front side, and the second air chamber 320 is connected to the first air chamber 310 on the vehicle rear side via an air chamber joint 330.

[0033] Second air chamber 320 is formed in a generally cylindrical shape that communicates with the air chamber on the vehicle rear side of first air chamber 310. Second air chamber 320 is disposed on the vehicle rear side of first air chamber 310. When a collision occurs to vehicle V, second air chamber 320 inflates and deploys from the vehicle underside of front hood portion 10 toward the vehicle rear side.

[0034] The air chamber joint 330 as a joint connects the first air chamber 310 and the second air chamber 320 in the front airbag 300. When the front airbag 300 is stored in the front airbag storage section 200, the air chamber joint 330 abuts against the outer surface of the front airbag storage section 200 in the vehicle width direction. The air chamber joint 330 is provided as a flow path for sending the gas released from the inflator IF from the first air chamber 310 to the second air chamber 320. Specifically, for example, the air chamber joint 330 is provided on the vehicle rear side of the first air chamber 310, and connects the vehicle rear side of the first air chamber 310 and the vehicle front side of the second air chamber 320.

[0035] When a collision occurs in the vehicle V, the front airbag 300 inflates and deploys below the front hood portion 10 of the vehicle. 5(b), the first air chamber 310 has a spherical shape and inflates and deploys under the vehicle front hood portion 10 while lifting the front hood portion 10. The second air chamber 320 has a cylindrical shape and inflates and deploys from the vehicle underside of the front hood portion 10 toward the rear of the vehicle so as to cover the A-pillar AP.

[0036] The inflator IF is connected to the front airbag 300, and supplies gas to the front airbag 300 when a collision occurs in the vehicle V. The inflator IF is provided, for example, on the lower side of the front airbag storage portion 200 of the vehicle.

[0037] <Actions and Effects> The operation of the vehicle body front structure 1 according to this embodiment configured as described above when a pedestrian or the like PD collides with the vehicle V from the front side of the vehicle will be described with reference to FIGS. 6 and 7. FIG.

[0038] (When a collision occurs from the front of vehicle V) When a pedestrian or the like PD collides with the front side of the vehicle V, the pedestrian or the like PD comes into contact with the front grille portion FG. When the pedestrian or the like PD comes into contact with the front grille portion FG and receives an impact, the vehicle body front structure 1 activates the inflator IF, which supplies gas to the front airbag 300, causing the front airbag 300 to inflate and deploy.

[0039] 6(a), for example, when gas is supplied from the inflator IF, the first air chamber 310 is inflated and deployed toward an opening provided on the inside in the vehicle width direction of the front airbag storage portion 200. The storage lid portion 220 of the front airbag storage portion 200 is pushed toward the upper side of the vehicle by the inflated first air chamber 310, and opens toward the upper side of the vehicle. Then, a pressing force toward the upper side of the vehicle is generated by the storage lid portion 220 and the first air chamber 310. The pressing force of the first air chamber 310 presses the first hinge 21 and the second hinge 22 of the front hood opening / closing part 20, which are in contact with the upper side of the vehicle of the storage lid part 220, toward the upper side of the vehicle. The rear side of the front hood part 10 is then pushed up toward the upper side of the vehicle. The rear side of the front hood part 10 opens, and a gap is created between the front hood part 10 and the toe board part 110. At this time, a pressing force from the first air chamber 310 is applied to the air chamber joint 330, and the air chamber joint 330 is pressed against the outer surface of the front airbag storage section 200 in the vehicle width direction, thereby blocking the flow path of gas sent from the first air chamber 310 to the second air chamber 320. Therefore, the amount of gas sent to the second air chamber 320 is kept small, and the second air chamber 320 remains in a folded state.

[0040] Further gas is supplied from the inflator IF, and as shown in FIG. 6(b), the first air chamber 310 expands into a substantially spherical shape, which causes the first air chamber 310 to push the front hood section 10 upward toward the vehicle. The front hood section 10 is lifted upward toward the vehicle by the first hinge 21 and the second hinge 22 of the front hood opening / closing section 20 provided on the vehicle rear side of the front hood section 10. A gap is then created between the front hood section 10 and the toe board section 110, and the front hood section 10 is inclined from the upper rear side toward the lower front side of the vehicle, with the front hood lock section LK provided on the front side of the vehicle as a fulcrum.

[0041] A pedestrian or the like PD that hits the front grille portion FG rides up the upper side of the front hood portion 10 toward the rear of the vehicle, using the front upper side of the vehicle of the front grille portion FG as a fulcrum due to the impact of the collision. The pedestrian or the like PD that falls onto the front hood portion 10 is received by the inclined front hood portion 10.

[0042] Further gas is supplied from the inflator IF, and the first air chamber 310 further expands and deploys into an approximately spherical shape, causing the air chamber joint 330, which had been pressed against the outer surface of the front airbag storage section 200 in the vehicle width direction, to move toward the upper side of the vehicle, and gas is sent to the second air chamber 320, which then expands and deploys toward the rear of the vehicle.

[0043] 7, the second air chamber 320 protrudes toward the rear of the vehicle from between the front hood portion 10 and the toe board portion 110, which is opened by the first air chamber 310, and deploys to cover the front side of the vehicle of the A-pillar AP. By inflating and deploying between the A-pillar AP and the pedestrian or other PD, the second air chamber 320 absorbs the impact of a collision between the A-pillar AP and the pedestrian or other PD.

[0044] As described above, when a pedestrian or the like PD collides with the front of the vehicle V, the first air chamber 310 in the front airbag 300 inflates and deploys into a substantially spherical shape, pushing up the storage lid portion 220 and the front hood portion 10 toward the upper side of the vehicle. The front airbag 300 creates a gap between the front hood portion 10 and the toe board portion 110, and is inclined from the upper rear side of the vehicle toward the lower front side of the vehicle, with the front hood lock portion LK provided at the front of the vehicle as a fulcrum. Furthermore, the front airbag 300 protrudes toward the rear of the vehicle from the gap between the front hood portion 10 and the toe board portion 110, and inflates and deploys so as to cover the A-pillar AP. The vehicle body front structure 1 receives the pedestrian or other PD by the inclination of the front hood section 10 created by the first air chamber 310, and the second air chamber 320 expands and deploys to cover the A-pillar AP, thereby absorbing the impact of a collision with the pedestrian or other PD and reducing the burden on the pedestrian or other PD.

[0045] Then, when the vehicle V comes to a stop, the absorption of the impact caused by the collision in the vehicle body front structure 1 ends.

[0046] As described above, the vehicle body front structure 1 according to this embodiment includes the front hood portion 10, which is provided on the vehicle front side of the cabin CA of the vehicle V and is provided with the front hood opening / closing portion 20 as an opening / closing portion that can be opened and closed by lifting the front side of the vehicle and can be raised and lowered in the vertical direction of the vehicle, the front airbag storage portion 200, which is provided on the vehicle lower side of the front hood opening / closing portion 20 and has, on the vehicle upper side, a storage lid portion 220 that has a rotation axis OR facing in the longitudinal direction of the vehicle and is open on the inside in the vehicle width direction, and the front airbag storage portion 200. 00 and inflates and deploys to the underside of the vehicle of the front hood portion 10 when a collision occurs from the front side of the vehicle, and an inflator IF that supplies gas to the front airbag 300 when a collision occurs from the front side of the vehicle, and the front airbag 300 includes at least a first air chamber 310 as a first air chamber having a spherical shape to which gas is supplied from the inflator IF, and a second air chamber 320 as a second air chamber having a cylindrical shape that is connected to the first air chamber 310 on the vehicle rear side and communicates with the air chamber. That is, the first air chamber 310 of the front airbag 300 that is inflated and deployed toward the inside in the vehicle width direction pushes up the storage lid portion 220 and the front hood portion 10 toward the upper side of the vehicle. By the first air chamber 310 pushing up the front hood portion 10 toward the upper side of the vehicle, the first air chamber 310 creates a gap between the front hood portion 10 and the toe board portion 110 and forms an inclination from the upper rear side of the vehicle toward the lower front side of the vehicle, with the front hood lock portion LK provided on the front side of the vehicle as a fulcrum. Furthermore, the second air chamber 320 in the front airbag 300 protrudes toward the rear of the vehicle through the gap between the front hood portion 10 and the toe board portion 110, and inflates and deploys so as to cover the A-pillar AP. Therefore, the vehicle body front structure 1 receives the pedestrian, etc. PD by the inclination of the front hood section 10 created by the first air chamber 310, and by the second air chamber 320 expanding and deploying to cover the A-pillar AP, it is possible to absorb the impact of a collision with the pedestrian, etc. PD and reduce the burden on the pedestrian, etc. PD. Therefore, when a collision occurs with a pedestrian or the like from the front of the vehicle, the burden on the pedestrian or the like can be reduced.

[0047] In the vehicle body front structure 1 of this embodiment, the air chamber joint 330, which serves as a joint that connects the first air chamber 310 and the second air chamber 320 in the front airbag 300, abuts against the outer surface of the front airbag storage section 200 in the vehicle width direction when the front airbag is stored in the front airbag storage section 200. In other words, when the first air chamber 310 of the front airbag 300 is inflated and deployed toward the opening on the inside in the vehicle width direction, the air chamber joint 330, which connects the first air chamber 310 and the second air chamber 320, is pressed against the outer surface of the front airbag storage section 200 in the vehicle width direction by the pressing force of the first air chamber 310. Then, the amount of gas sent to the second air chamber 320 is kept small, so that the second air chamber 320 remains folded. Further gas is supplied from the inflator IF, and the first air chamber 310 further inflates and deploys into a substantially spherical shape, causing the air chamber joint 330, which had been pressed against the outer surface of the front airbag storage section 200 in the vehicle width direction, to move toward the upper side of the vehicle. Then, gas is sent to the second air chamber 320, causing the second air chamber 320 to inflate and deploy. Therefore, the first air chamber 310 in the front airbag 300 inflates and deploys into a substantially spherical shape, pushing the front hood section 10 upward toward the vehicle, and then the second air chamber 320 inflates and deploys, whereby the second air chamber 320 can reliably protrude toward the rear of the vehicle from the gap between the front hood section 10 and the toe board section 110. The second air chamber 320 inflates and deploys to stably cover the A-pillar AP, thereby absorbing the impact of a collision with the pedestrian or other PD and reducing the burden on the pedestrian or other PD. Therefore, when a collision occurs with a pedestrian or the like from the front of the vehicle, the burden on the pedestrian or the like can be reduced.

[0048] The above describes in detail an embodiment of the present invention with reference to the drawings, but the specific configuration is not limited to this embodiment, and includes designs within the scope of the gist of the present invention. [Explanation of symbols]

[0049] 1; Front body structure 10; Front hood section 20. Front hood opening and closing 30; Front trunk 100;frame part 110;Toe board section 150; upper frame 200;Front airbag storage area 210;Storage Unit 220; Storage lid 300;Front airbags 310; First air chamber 320; Second air chamber 330: Air chamber joint AP; A-pillar IF; Inflator LK: Front hood lock V; Vehicle

Claims

1. a front hood portion provided on a front side of a cabin of the vehicle, the front hood portion having an opening / closing portion that can be opened and closed by lifting the front side of the vehicle and can be raised and lowered in the vertical direction of the vehicle; a front airbag storage section that is provided below the opening / closing section, has a storage lid on an upper side of the vehicle and has a rotation axis facing the front-rear direction of the vehicle, and is open on an inner side in the vehicle width direction; a front airbag that is stored in the front airbag storage portion and that inflates and deploys to the underside of the front hood portion of the vehicle when a collision occurs from the front side of the vehicle; an inflator that supplies gas to the front airbag when a collision occurs from the front side of the vehicle; Equipped with The front airbag includes at least a first air chamber having a spherical shape to which gas is supplied from the inflator; a second air chamber having a cylindrical shape connected to the first air chamber at the vehicle rear side so as to communicate with the first air chamber; A vehicle front structure comprising:

2. 2. The vehicle body front structure according to claim 1, wherein a joint connecting the first air chamber and the second air chamber in the front airbag abuts against a vehicle width direction outer surface of the front airbag storage section when the front airbag is stored in the front airbag storage section.

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