WO2023021894A1 - エアバッグ取付構造 - Google Patents
エアバッグ取付構造 Download PDFInfo
- Publication number
- WO2023021894A1 WO2023021894A1 PCT/JP2022/027663 JP2022027663W WO2023021894A1 WO 2023021894 A1 WO2023021894 A1 WO 2023021894A1 JP 2022027663 W JP2022027663 W JP 2022027663W WO 2023021894 A1 WO2023021894 A1 WO 2023021894A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- airbag
- flap
- mounting structure
- door
- guide
- Prior art date
Links
- 230000002093 peripheral effect Effects 0.000 description 18
- 239000000463 material Substances 0.000 description 6
- 230000002452 interceptive effect Effects 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000003776 cleavage reaction Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/205—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in dashboards
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
- B60R2021/21537—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member characterised by hinges
Definitions
- the present invention relates to an airbag mounting structure.
- EP2750935B1 discloses a vehicle safety device comprising a door connected to a support frame via a hinge, and a deflector provided between the door and the airbag to protect the hinge when the airbag deploys.
- the airbag inflator when the airbag inflator is activated, the airbag first inflates in the space below the door. Then, pressure due to the inflation of the airbag acts, tearing the tear line formed in the instrument panel, and the door rotates around the hinge. This inflates the airbag toward the occupant.
- the deflector for protecting the hinge is molded integrally with the hinge. That is, the deflector is made of the same material as the elastic hinge and has the same thickness. Therefore, when the airbag expands in the space below the door, the deflector bends. This delays the application of sufficient pressure to the location of the tear line. That is, the pressure to be applied to the rupture line is dispersed by the amount of expansion of the airbag at a position where there is no rupture line (more precisely, a position different from the position where the airbag is to be ruptured first).
- the airbag when the airbag is inflated in the deployment passage below the door, it is easy to concentrate the pressure on the position of the rupture line (position to be ruptured first).
- the airbag mounting structure for mounting the airbag to the instrument panel has at least one end along the tear line of the instrument panel, and when the airbag deploys, the a door portion that opens at one end; a mounting portion that has an opening portion that opens when the airbag deploys and becomes an open state; A hinge portion connected to rotatably hold the door portion protrudes from the mounting portion so as to narrow a deployment passage between the airbag and the door portion, and guides the deployment of the airbag. a guide portion; and a flap connected to the guide portion, interposed between the airbag and the hinge portion, and rotated together with the door portion by being biased by the airbag when the airbag is deployed. Further, the guide portion has higher rigidity than the flap.
- the guide portion protruding from the mounting portion so as to narrow the deployment passage has higher rigidity than the flap. Therefore, when the airbag is inflated, the high-rigidity guide portion reduces the volume of the deployment passage, so that the inflation of the airbag makes it easy to concentrate the pressure on the position of the rupture line.
- FIG. 1 is a perspective view of an instrument panel to which an airbag mounting structure according to an embodiment of the invention is applied.
- FIG. 2 is a view corresponding to the II-II section of FIG. 1, and is a cross-sectional view for explaining the airbag mounting structure.
- 3 is an enlarged view of the vicinity of the guide portion in FIG. 2.
- FIG. FIG. 4 is a rear perspective view illustrating the airbag mounting structure.
- 5 is a perspective view showing a state in which the guide portion and the flap are removed from the airbag mounting structure of FIG. 4.
- FIG. FIG. 6 is a perspective view of a guide portion and a flap.
- FIG. 7 is a cross-sectional view for explaining a state in the middle of deployment of the airbag.
- FIG. 8 is a cross-sectional view for explaining the deployed state of the airbag.
- FIG. 9 is a cross-sectional view illustrating an airbag mounting structure according to a modification of the embodiment of the invention.
- FIG. 1 is a perspective view of the instrument panel 2.
- FIG. FIG. 2 is a view corresponding to the II-II section of FIG. 1, and is a cross-sectional view for explaining the airbag mounting structure 10. As shown in FIG.
- the instrument panel 2 is provided in the front part of the interior of the vehicle 1 .
- a vehicle 1 includes an airbag device 3 .
- the airbag device 3 is a safety device for protecting passengers in an emergency such as when the vehicle 1 collides.
- the airbag device 3 is provided on the front passenger seat side portion of the instrument panel 2 to protect the front passenger seat occupant.
- the airbag device 3 includes an airbag module 4 (see FIG. 2), an airbag lid 5 and an airbag mounting structure 10 .
- the airbag device 3 includes, for example, a driver's seat airbag, a passenger's seat airbag, a side airbag, a curtain airbag, and the like.
- the airbag device 3 is an airbag for the passenger's seat.
- the airbag module 4 has an airbag 4a, an airbag case 4b, a plurality of hooks 4c, and an inflator 4d.
- the airbag 4a is formed in a bag shape, folded and housed in the airbag case 4b.
- the airbag 4a is deployed and inflated in an emergency.
- a plurality of hooks 4 c fix the airbag case 4 b to the instrument panel 2 .
- the inflator 4d generates gas for deploying and inflating the airbag 4a.
- the airbag lid 5 is provided on the passenger seat side portion of the instrument panel 2 .
- the airbag lid 5 includes an integrated type that is provided integrally with the instrument panel 2 , a separate type that is provided separately from the instrument panel 2 and is attached to the instrument panel 2 , and the like.
- the airbag lid 5 is integral and forms part of the instrument panel 2 .
- the airbag lid 5 normally hides the airbag module 4 from the surface.
- the airbag lid 5 has a tear line 6 .
- the airbag lid 5 is torn from the tear line 6 by the pressing force of the deployed and inflated airbag 4a to form an opening for inflating the airbag 4a into the vehicle interior.
- the tear line 6 is a groove that is recessed from the back surface of the airbag lid 5 and does not reach the surface of the airbag lid 5 .
- the tear line 6 is provided in a substantially H shape having a horizontal tear line portion 6a extending substantially in the vehicle width direction and left and right vertical tear line portions 6b extending substantially in the vehicle front-rear direction from both ends of the horizontal tear line portion 6a. be done.
- the tear line 6 further has a pair of horizontal tear line portions 6c that connect the ends of the vertical tear line portion 6b.
- the airbag lid 5 has a pair of openings 7 defined by tear lines 6 that can form openings.
- the horizontal tear line portion 6a is the position where the tear line 6 of the substantially H shape should be cleaved first.
- FIG. 3 is an enlarged view of the vicinity of the guide portion 50 in FIG.
- FIG. 4 is a rear perspective view illustrating the airbag mounting structure 10.
- FIG. 5 is a perspective view showing a state in which the guide portion 50 and the flap 60 are removed from the airbag mounting structure 10 of FIG. 4.
- FIG. 6 is a perspective view of the guide portion 50 and the flap 60.
- the airbag mounting structure 10 mounts the airbag 4a to the instrument panel 2. As shown in FIG. 2, the airbag mounting structure 10 has a mounting portion 20 , a pair of hinge portions 30 , a pair of door portions 40 , a guide portion 50 and a flap 60 .
- the mounting portion 20 is molded from a resin material.
- the mounting portion 20 has an opening portion 20a through which the door portion 40 is opened when the airbag 4a is deployed.
- An airbag case 4b that houses the airbag 4a is attached to the attachment portion 20 via hooks 4c.
- the mounting portion 20 has a body portion 21, a flange portion 22, a through hole 23, and a plurality of reinforcing ribs 24 (see FIGS. 4 and 5).
- the body portion 21 is formed in a substantially rectangular tubular shape. As shown in FIG. 2, one end portion 21a of the body portion 21 is formed with an opening portion 20a. The airbag module 4 is attached to the other end portion 21 b of the body portion 21 .
- the flange portion 22 is formed on the outer circumference of one end portion 21a of the main body portion 21 over the entire circumference. As shown in FIG. 2 , the flange portion 22 is attached so as to abut on the back surface of the instrument panel 2 . The flange portion 22 is welded to the rear surface of the instrument panel 2 to reinforce the instrument panel 2 .
- the through hole 23 penetrates the main body portion 21 in the thickness direction. Hooks 4 c of the airbag module 4 are hooked on the through holes 23 . As a result, the airbag module 4 is attached to the attachment portion 20 .
- a plurality of reinforcing ribs 24 are provided on the outer periphery of the flange portion 22 at intervals.
- the reinforcing rib 24 connects and reinforces the body portion 21 and the flange portion 22 .
- a pair of hinge portions 30 are provided so as to rotatably hold each door portion 40 .
- the hinge portion 30 is molded integrally with the door portion 40 and the mounting portion 20 .
- the hinge portion 30 is formed to protrude inside the opening portion 20a (into the deployment passage 8) so as to have a substantially U-shaped cross section.
- the deployment passage 8 means a space surrounded by the door portion 40 , the airbag 4 a and the attachment portion 20 .
- the airbag 4a provided in the deployment passage 8 is attached to the attachment portion 20 at an angle so that the distance from the other hinge portion 30 is greater than the distance from the other hinge portion 30. As shown in FIG. That is, the airbag 4a is attached to the attachment portion 20 in a state in which the deployment direction is not perpendicular to the door portion 40 but is inclined.
- the door portion 40 is molded integrally with the mounting portion 20 and the hinge portion 30 .
- the door portion 40 is provided such that one end portion 41 extends along the lateral tear line portion 6a of the instrument panel 2 . That is, the door portion 40 is provided so that at least one end portion 41 is along the tear line 6 of the instrument panel 2 .
- the door portion 40 is provided so that both side end portions of the one end portion 41 are along the vertical split line portions 6b of the instrument panel 2, respectively.
- the door portion 40 is attached so as to abut against the rear surface of the airbag lid 5 .
- the door portion 40 is welded to the rear surface of the airbag lid 5 to reinforce the airbag lid 5 .
- a pair of door portions 40 are provided so that one end portions 41, which are free ends, face each other inside the horizontal tear line portion 6a.
- the door portion 40 opens so that the one end portion 41 rotates about the hinge portion 30 by deploying the airbag 4a.
- the door portion 40 has a free end stopper portion 42 .
- the free end stopper portion 42 extends in the axial direction of the rotation shaft of the hinge portion 30 (also referred to as the extending direction of the hinge portion 30, which is the width direction of the vehicle 1 when mounted in front of the front passenger seat of the vehicle 1). extending along As shown in FIG. 4, the free end portion 61 of the flap 60 abuts against the free end stopper portion 42 when the airbag 4a is accommodated, that is, before the airbag 4a deploys.
- the free end stopper portion 42 defines the position of the free end portion 61 .
- the guide part 50 is provided so as to protrude from the main body part 21 of the mounting part 20 into the deployment passage 8 .
- the guide portion 50 guides the deployment of the airbag 4a while reducing the volume of the deployment passage 8.
- the guide portion 50 is molded from a resin material.
- the guide portion 50 has a flat portion 51 , a projecting portion 52 , an inclined portion 53 and a tip portion 54 .
- the airbag 4a provided in the deployment passage 8 is tilted to the attachment portion 20 so that the distance from the other hinge portion 30 is greater than the distance from the other hinge portion 30. It is attached. Therefore, a space is likely to be created between the airbag 4 a and the hinge portion 30 .
- the guide portion 50 is mounted at a position where the hinge portion 30 of the mounting portion 20 having a larger distance from the airbag 4a is connected. In this manner, the guide portion 50 fills the space between the airbag 4a and the hinge portion 30, so that when the airbag 4a is inflated in the deployment passage 8, pressure is applied to the tear line (lateral tear line portion 6a). can be concentrated.
- the guide part 50 has higher rigidity than the flap 60.
- the rigidity means the difficulty of deformation (small amount of deformation) when the airbag 4a is deployed and inflated and the pressure in the deployment passage 8 is increased. That is, when the airbag 4a comes into contact with the guide portion 50 and the flap 60 while the internal pressure of the airbag 4a is increased in the deployment passage 8, the guide portion 50 is less likely to deform than the flap 60 (deformation amount is small).
- the guide portion 50 has reinforcing ribs 56 on the rear surface that does not face the deployment passage 8 . This increases the rigidity of the guide portion 50 (see FIG. 6).
- the guide part 50 is provided separately from the mounting part 20 and is attached to the mounting part 20 . Therefore, the guide portion 50 can be molded separately from the mounting portion 20 that is integrally molded with the hinge portion 30 . Therefore, for example, the mounting portion 20 and the guide portion 50 can be made of different materials or have different thicknesses, so that the rigidity of the guide portion 50 can be easily increased.
- the flat portion 51 is provided along the mounting portion 20 and attached to the mounting portion 20 .
- the planar portion 51 has a through hole (not shown) at a position overlapping the through hole 23 of the mounting portion 20, through which the hook 4c of the airbag module 4 is inserted.
- the protruding portion 52 protrudes from the mounting portion 20 so that the deployment passage 8 between the airbag 4a and the door portion 40 is narrowed.
- the protruding portion 52 protrudes inward from the mounting portion 20 within a range that does not overlap with the airbag 4a when the airbag 4a is viewed from the opening 20a. Therefore, when attaching the airbag 4a, it is possible to prevent the guide portion 50 from interfering with the airbag 4a.
- the inclined portion 53 connects the upper end of the flat portion 51 and the lower end of the projecting portion 52 .
- the inclined portion 53 is inclined so that the deployment passage 8 is gradually narrowed from the connecting portion with the flat portion 51 toward the connecting portion with the projecting portion 52 .
- the tip portion 54 is provided at the upper end of the guide portion 50 .
- the tip portion 54 extends from the upper end of the projecting portion 52 and connects the projecting portion 52 and the mounting portion 20 .
- the tip portion 54 is provided substantially perpendicular to the mounting portion 20 .
- An inner peripheral end portion 54a of the distal end portion 54 on the inner peripheral side of the deployment passage 8 is provided closer to the outer periphery of the deployment passage 8 (position closer to the main body portion 21) than the connection portion 54b to which the flap 60 is connected.
- the inner peripheral end portion 54a functions as a rotation stopper portion when the flap 60 rotates. As a result, the flap 60 is prevented from rotating more than necessary and a load is applied to the rotating shaft of the flap 60 (the connection portion 54b where the flap 60 is connected to the guide portion 50), thereby preventing the flap 60 from being damaged. are preventing.
- the inner peripheral end portion 54a functions as a rotation stopper portion.
- the rotation stopper portion is not limited to this. may be That is, from the viewpoint of functioning as a rotation stopper portion, the shape and arrangement are not particularly limited.
- the inner peripheral end portion 54a is provided at a position a predetermined distance outward in the deployment direction of the airbag 4a from the connecting portion 54b between the flap 60 and the guide portion 50 .
- This predetermined distance is at least the thickness of the flap 60 . That is, the distal end portion 54 is positioned closer to the mounting portion 20 than the connecting portion 54b between the flap 60 and the guide portion 50. As shown in FIG. Specifically, the distal end portion 54 is positioned closer to the attachment portion 20 than the connecting portion 54b by at least the thickness of the flap 60 .
- the flap 60 is molded integrally with the guide portion 50 .
- the guide portion 50 and the flap 60 may be separately formed and assembled.
- the rigidity of the guide portion 50 can be made higher than that of the flap 60 by forming the guide portion 50 and the flap 60 with different materials or by using different thicknesses.
- the flap 60 is connected to the guide portion 50 and interposed between the airbag 4a and the hinge portion 30.
- the flap 60 extends along the direction in which the hinge portion 30 extends.
- the flap 60 has a free end portion 61, an abutment portion 62, and a pair of ribs 70 (see FIG. 6).
- the flap 60 is urged and bent by the airbag 4a when the airbag 4a is deployed, and rotates together with the door portion 40 about the connecting portion 54b when the airbag 4a is deployed.
- the flap 60 is connected to the guide portion 50 in the vicinity of the distal end portion 54 of the guide portion 50 in the deployment direction of the airbag 4a.
- a connection point 54b between the flap 60 and the guide portion 50 is separated from the tip portion 54 of the guide portion 50 by a predetermined distance.
- This predetermined distance is a distance smaller than the length of the contact portion 62 of the flap 60 .
- the flap 60 is connected at a position a predetermined distance away from the distal end portion 54 of the guide portion 50. Therefore, when the flap 60 rotates, the flap 60 abuts against the inner peripheral end portion 54a of the distal end portion 54 of the guide portion 50, and the rotation of the flap 60 is restricted. Therefore, it is possible to prevent a force that greatly deforms the flap 60 from being applied.
- the free end portion 61 is in contact with the door portion 40 when the airbag 4a is accommodated.
- the position of the free end portion 61 is defined by contacting the free end stopper portion 42 .
- the free end portion 61 of the flap 60 contacts the free end stopper portion 42, so the position of the flap 60 can be defined as intended.
- the flap 60 is restrained by the door portion 40, it is possible to prevent the flap 60 from moving due to vibrations when the vehicle 1 is running and generating rattling noise.
- the contact portion 62 is formed over a predetermined length from the connecting portion 54b of the flap 60. As shown in FIG. The contact portion 62 contacts the inner peripheral end portion 54a of the tip portion 54 when the airbag 4a is deployed. The contact portion 62 is formed thicker than other portions of the flap 60 .
- the abutment portion 62 formed thicker than the other portions of the flap 60 is positioned at the inner peripheral end portion 54a of the tip portion 54 of the guide portion 50. hit. Therefore, it is possible to cope with a large force acting on the flap 60 due to the impact when the flap 60 rotates and hits the inner peripheral end portion 54a.
- the ribs 70 are provided at both ends of the flap 60 in the extending direction (the axial direction of the rotation shaft of the hinge portion 30 and the width direction of the vehicle 1 when mounted on the vehicle 1). It is provided in the portion 63 and connected to the guide portion 50 .
- the ribs 70 reinforce the ends 63 of the flaps 60 to make them stiffer than the central portion 64 .
- the central portion 64 of the flap 60 is relatively weak with respect to the ends 63 .
- both ends 63 indicate areas including positions separated by several millimeters from both ends in the extending direction of the flap 60 .
- both ends 63 in the extending direction of the flap 60 may be formed thicker than the central portion 64 . That is, the flap 60 only needs to have higher rigidity at both ends 63 in the axial direction of rotation than at the central portion 64 between the ends 63 .
- a guide portion 55 is provided instead of the guide portion 50 on the surface facing the surface of the body portion 21 on which the guide portion 50 is provided.
- the guide portion 55 does not have the protruding portion 52 and the inclined portion 53, and is provided only with the flat portion 51 and the tip portion 54.
- a flap 60 is connected to the guide portion 55 as well as the guide portion 50 .
- a pair of guide portions 50 may be provided on a pair of opposing planes of the main body portion 21 .
- FIG. 7 is a cross-sectional view illustrating a state in which the airbag 4a is in the process of being deployed.
- FIG. 8 is a cross-sectional view for explaining the deployed state of the airbag 4a.
- the airbag device 3 In the event of an emergency such as a collision of the vehicle 1, the airbag device 3 operates to protect the passenger in the passenger's seat based on a signal from a sensor (not shown) that detects the collision.
- the airbag 4a When the airbag device 3 operates, the airbag 4a is deployed and inflated by the gas generated by the inflator 4d, and presses the airbag lid 5. As shown in FIG.
- the flap is arranged in the deployment path defined by the upper surface of the airbag and the main body portion of the mounting portion.
- the flaps flex and the pressure cannot be concentrated on the tear line between the doors.
- the amount of deflection increases because the flap bends so as to rotate from the point of contact with the attachment portion, which is the base of the flap.
- the guide portion 50 having higher rigidity than the flap 60 is provided so as to protrude from the mounting portion 20 so as to narrow the deployment passage 8 , and the flap 60 is connected to the guide portion 50 . be done. Therefore, since the highly rigid guide part 50 reduces the volume of the deployment passage 8, the pressure can be concentrated between the door parts 40 (lateral tear line part 6a) when the airbag 4a is inflated. Moreover, since the flap 60 is connected to the guide portion 50 projecting from the mounting portion 20, the size of the flap 60 can be reduced. As a result, the deflection of the flap 60 is reduced by the size reduction of the flap 60 as compared with the above-described comparative example.
- the airbag 4a When the airbag 4a is inflated and the pressure in the deployment passage 8 rises, the airbag lid 5 is torn along the tear line 6 and the opening/closing portion 7 is opened. The airbag 4a inflates further toward the outside of the opening/closing portion 7 (toward the vehicle interior), and restrains the body of the passenger seated in the front passenger seat so as to protect it.
- the opening/closing portion 7 of the airbag lid 5 when the opening/closing portion 7 of the airbag lid 5 is opened, the portion near the center of the horizontal tear line portion 6a is first cleaved, and then spreads to both ends. It is desirable that the cleavage line 6b is cleaved (see FIG. 1). In other words, it is desirable that the pair of open/close portions 7 of the airbag lid 5 split from the center and open in opposite directions (so-called double doors).
- a flap 60 is provided between the airbag 4a and the hinge portion 30. Therefore, when the airbag 4a deploys, the pressure due to the expansion of the airbag 4a can be concentrated between the pair of door portions 40 (the lateral tear line portion 6a), and the hinge portion 30 can be acted upon. can be prevented. As described above, in the airbag mounting structure 10, when the pressure due to the inflation of the airbag 4a acts, the airbag lid 5 is torn from the central lateral tearing line portion 6a.
- ribs 70 are provided on both ends 63 of the flap 60 . Both end portions 63 of the flap 60 have higher rigidity than the center portion 64 of the flap 60 due to the provision of the ribs 70 . Therefore, the flap 60 is deformed first in the vicinity of the relatively fragile central portion 64 and then deformed in the vicinity of the end portions 63 .
- the airbag lid 5 splits first in the vicinity of the center of the lateral split line portion 6a, spreads from there to both ends, and after the lateral split line portion 6a splits. , the longitudinal tear line portion 6b is cleaved. Therefore, in the airbag mounting structure 10 , the tear lines 6 can be split in a desired order to open the opening/closing portion 7 of the airbag lid 5 together with the door portion 40 .
- the airbag mounting structure 10 for mounting the airbag 4a to the instrument panel 2 has at least one end 41 along the tear line 6 of the instrument panel 2, and the one end 41 opens when the airbag 4a deploys.
- a mounting portion 20 having a door portion 40 and an opening portion 20a in which the door portion 40 is opened when the airbag 4a deploys and becomes an open state;
- a hinge portion 30 which is connected and rotatably holds the door portion 40 protrudes from the mounting portion 20 so as to narrow the deployment passage 8 between the airbag 4a and the door portion 40, thereby preventing the deployment of the airbag 4a.
- 60 and the guide portion 50 has higher rigidity than the flap 60 .
- the guide portion 50 protruding from the mounting portion 20 so as to narrow the deployment passage 8 has higher rigidity than the flap 60 . Therefore, when the airbag 4a is inflated, the highly rigid guide portion 50 reduces the volume of the deployment passage 8, so that the pressure due to the inflation of the airbag 4a is easily concentrated on the tear line 6. ⁇ Further, since the flap 60 is connected to the guide portion 50 to reduce the size of the flap 60, even if the flap 60 is bent when the airbag 4a is inflated in the deployment passage 8 below the door portion 40, The amount of deflection can be reduced by the size of the flap 60 .
- both end portions 63 in the axial direction in rotation have higher rigidity than the central portion 64 between the end portions 63 .
- the flap 60 has ribs 70 connected to the guide portion 50 at both ends 63 .
- ribs 70 are provided on both ends 63 of the flap 60 .
- Both end portions 63 of the flap 60 have higher rigidity than the center portion 64 of the flap 60 due to the provision of the ribs 70 . Therefore, the flap 60 deforms first in the vicinity of the central portion 64 and deforms in the vicinity of the both end portions 63 later. Therefore, when the pressure due to the expansion of the airbag 4a acts, the airbag lid 5 splits first in the vicinity of the center of the lateral split line portion 6a, spreads from there to both ends, and after the lateral split line portion 6a splits. , the vertical tear line portion 6b is cleaved. Therefore, in the airbag mounting structure 10 , the tear lines 6 can be split in a desired order to open the opening/closing portion 7 of the airbag lid 5 together with the door portion 40 .
- the guide portion 50 also has a rotation stopper portion (inner peripheral end portion 54a) that restricts the rotation of the flap 60 when the airbag 4a is deployed.
- the inner peripheral end portion 54a is provided at a position a predetermined distance away from the connecting portion 54b between the flap 60 and the guide portion 50 to the outside in the deployment direction of the airbag 4a.
- the predetermined distance is at least the distance corresponding to the thickness of the flap 60 .
- the distal end portion 54 is positioned closer to the mounting portion 20 than the connecting portion 54b by the thickness of the flap 60. Therefore, when the flap 60 rotates and hits the inner peripheral end portion 54 a of the tip portion 54 of the guide portion 50 , the flap 60 does not protrude from the guide portion 50 into the deployment passage 8 . Therefore, it is possible to prevent the flap 60 from interfering with the inflating airbag 4a.
- the contact portion 62 that comes into contact with the rotation stopper portion (the inner peripheral end portion 54a) when the airbag 4a is deployed is formed thicker than the other portions.
- the contact portion 62 formed thicker than other portions contacts the inner peripheral end portion 54 a of the tip portion 54 of the guide portion 50 . Therefore, it is possible to cope with a large force acting on the flap 60 due to the impact when the flap 60 rotates and hits the inner peripheral end portion 54a.
- the guide portion 50 protrudes from the mounting portion 20 within a range that does not overlap with the airbag 4a when the airbag 4a is viewed from the opening portion 20a.
- the guide portion 50 is provided separately from the mounting portion 20 and attached to the mounting portion 20 .
- the guide part 50 can be formed separately from the mounting part 20 integrally formed with the hinge part 30. Therefore, for example, the mounting portion 20 and the guide portion 50 can be made of different materials or have different thicknesses, so that the rigidity of the guide portion 50 can be easily increased.
- a free end portion 61 of the flap 60 is in contact with the door portion 40 in a state in which the airbag 4a is accommodated. have.
- the free end portion 61 of the flap 60 contacts the free end stopper portion 42, so the position of the flap 60 can be defined as intended.
- the flap 60 is restrained by the door portion 40, it is possible to prevent the flap 60 from moving due to vibrations when the vehicle 1 is running and generating rattling noise.
- a pair of door portions 40 are provided such that one end portions 41 thereof face each other at a position along the tear line (horizontal tear line portion 6a), and the hinge portion 30 rotates each door portion 40.
- a pair of airbags 4a are provided so as to hold the airbags 4a. , at a position where the hinge portion 30 of the mounting portion 20 having a larger distance from the airbag 4a is connected.
- the airbag 4a is inclined and attached to the attachment portion 20 so that the distance from the other hinge portion 30 is greater than the distance from the one hinge portion 30, so that the airbag 4a and the hinge portion 30
- the pressure can be concentrated on the tear line (lateral tear line portion 6a). can be done.
- the tip portion 54 is located closer to the attachment portion 20 than the connecting portion 54b by at least the thickness of the flap 60.
- the height of the distal end portion 54 from the mounting portion 20 may be the same as that of the connecting portion 54b.
- the highly rigid guide portion 50 reduces the volume of the deployment passage 8, when the airbag 4a is inflated in the deployment passage 8 below the door portion 40, the rupture line 6 does not move. Easy to concentrate pressure.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Abstract
Description
Claims (11)
- エアバッグをインストルメントパネルに取り付けるエアバッグ取付構造であって、
少なくとも一端部が前記インストルメントパネルの開裂線に沿うように設けられ、前記エアバッグが展開することにより前記一端部が開く扉部と、
前記エアバッグが展開すると前記扉部が開いて開状態になる開口部を有し、前記エアバッグを収容するエアバッグケースが取り付けられる取付部と、
前記取付部に接続され、前記扉部を回動可能に保持するヒンジ部と、
前記エアバッグと前記扉部との間の展開通路が狭まるように前記取付部から突出し、前記エアバッグが展開するのをガイドするガイド部と、
前記ガイド部に接続されて前記エアバッグと前記ヒンジ部との間に介在し、前記エアバッグの展開時に前記エアバッグによって付勢されて前記扉部と共に回動するフラップと、
を備え、
前記ガイド部は、前記フラップと比較して剛性が高い、
エアバッグ取付構造。 - 請求項1に記載のエアバッグ取付構造であって、
前記フラップにおいて、回動における軸方向の両端部が当該両端部の間の中央部と比較して剛性が高い、
エアバッグ取付構造。 - 請求項2に記載のエアバッグ取付構造であって、
前記フラップは、前記両端部に前記ガイド部と連結されるリブを各々有する、
エアバッグ取付構造。 - 請求項1から3のいずれか一つに記載のエアバッグ取付構造であって、
前記ガイド部は、前記エアバッグの展開時に前記フラップの回動を規制する回動ストッパ部を有する、
エアバッグ取付構造。 - 請求項4に記載のエアバッグ取付構造であって、
前記回動ストッパ部は、前記フラップと前記ガイド部との接続箇所から、前記エアバッグの展開方向における外側に所定距離離れた位置に設けられる、
エアバッグ取付構造。 - 請求項5に記載のエアバッグ取付構造であって、
前記所定距離は、少なくとも前記フラップの厚さ分の距離である、
エアバッグ取付構造。 - 請求項4から6のいずれか一つに記載のエアバッグ取付構造であって、
前記フラップにおいて、前記エアバッグが展開した状態で前記回動ストッパ部に当たる当接部は、他の部分よりも厚く形成される、
エアバッグ取付構造。 - 請求項1から7のいずれか一つに記載のエアバッグ取付構造であって、
前記ガイド部は、前記開口部から前記エアバッグを見たときに前記エアバッグと重複しない範囲で前記取付部から突出している、
エアバッグ取付構造。 - 請求項1から8のいずれか一つに記載のエアバッグ取付構造であって、
前記ガイド部は、前記取付部とは別体に設けられて前記取付部に取り付けられている、
エアバッグ取付構造。 - 請求項1から9のいずれか一つに記載のエアバッグ取付構造であって、
前記フラップの自由端部は、前記エアバッグが収納されている状態で前記扉部と当接しており、
前記扉部は、前記自由端部の位置を規定する自由端ストッパ部を有する、
エアバッグ取付構造。 - 請求項1から10のいずれか一つに記載のエアバッグ取付構造であって、
前記扉部は、各々の前記一端部が前記開裂線に沿う位置にて対向するように一対設けられ、
前記ヒンジ部は、各々の前記扉部を回動可能に保持するように一対設けられ、
前記エアバッグは、一方の前記ヒンジ部との距離よりも他方の前記ヒンジ部との距離が大きくなるように傾斜して前記取付部に取り付けられ、
前記ガイド部は、前記取付部における前記エアバッグとの距離が大きい方の前記ヒンジ部が接続される位置に取り付けられる、
エアバッグ取付構造。
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CN202280016361.8A CN116997489A (zh) | 2021-08-16 | 2022-07-14 | 气囊安装构造 |
US18/278,935 US20240149822A1 (en) | 2021-08-16 | 2022-07-14 | Airbag Attachment Structure |
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JP2021132385A JP7041314B1 (ja) | 2021-08-16 | 2021-08-16 | エアバッグ取付構造 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US11932193B1 (en) * | 2023-04-13 | 2024-03-19 | Faurecia Interior Systems, Inc. | Vehicle interior panel for use over a deployable airbag and method of manufacturing |
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- 2022-07-14 CN CN202280016361.8A patent/CN116997489A/zh active Pending
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JP2023026931A (ja) | 2023-03-01 |
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CN116997489A (zh) | 2023-11-03 |
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