JP2008037349A - Head protection airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To devise an airbag to deploy between an occupant's head part and a vehicle body side part without running over a stored seat for an occupant to be seated. <P>SOLUTION: Thickness (length along the vehicle widthwise direction) of an extension cell 79 provided downward of a vehicle at a lower end 76B of the expansion part 76A to protect the head part of the occupant of the cell 76 constituting a rear side expansion part 36 of the airbag 16 is small in comparison with the thickness of an expansion part 76A to protect the head part, and the extension cell 79 is devised to deploy between a seat back 34B of the stored third row seat 34 and an upper part 91A of a side window glass 90 and a quarter panel garnish 91 to be a side part on the indoor side. Consequently, it does not run on the third row seat 34 in which the airbag 16 is stored. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a head protection airbag device that deploys an airbag toward a vehicle lower side on a side portion on the vehicle interior side at the time of a side collision or rollover of a vehicle, and in particular, a passenger's head and a vehicle body side portion. The present invention relates to a head protecting airbag device including an inflating portion that is deployed between the two.

  In recent years, a head protection airbag device that deploys an airbag in a curtain shape below a roof side rail portion at the time of a side collision or rollover has been mounted as an occupant protection auxiliary device. Further, a head protection airbag device that can be deployed between the head of the occupant seated on the seat and the side of the vehicle body to protect the occupant's head has already been known.

Here, Patent Document 1 below discloses this type of head protection airbag device. Briefly, in this head protection airbag device, an extended inflating area having an inflating portion having a thickness smaller than that of the head protecting area in the airbag is set from the lower end of the head protecting inflating area to the door belt line. By extending to the lower position, it is possible to cope with a rollover.
Japanese Patent No. 3520836

  However, in a vehicle equipped with a seat storage mechanism that folds the seat back onto the seat cushion and flips the entire seat up to a position along the compartment side wall, an airbag is installed between the stored seat and the compartment side wall. In order to expand the seat, it is necessary to take measures such as setting the seat storage position away from the compartment side wall.

  In view of the above-described facts, an object of the present invention is to obtain a head protection airbag device in which an airbag is deployed between an occupant head and a vehicle body side without riding on a stored occupant seat.

  A head protection airbag device according to a first aspect of the present invention includes an inflator that is disposed at a predetermined position of a vehicle and that operates when a side collision of the vehicle or a rollover occurs to eject gas, and a gas connected to the inflator. A supply passage, a plurality of inflatable portions that are connected to the gas supply passage and protect the head of an occupant, and a non-inflatable portion that connects the plurality of inflatable portions to each other and is folded in the vehicle vertical direction The vehicle is stored along the roof side rail portion of the vehicle in a state of being inflated, and is expanded by supply of gas from the inflator and is expanded toward the vehicle lower side on the side portion on the vehicle interior side. An airbag that is deployed between an occupant seat seat stored in a side portion of the vehicle and a side portion on the vehicle interior side, and the airbag protects the head portion of the airbag in a deployed state. It has an extension cell that is provided below the inflatable portion and has a smaller thickness than the inflatable portion that protects the head, and that extends between the stored passenger seat and the side on the vehicle interior side. It is characterized by.

  When a vehicle side collision or rollover occurs, the inflator is activated, and gas is supplied into the airbag stored in a folded state in the vehicle vertical direction along the roof side rail portion of the vehicle. For this reason, the airbag is deployed toward the vehicle lower side on the side portion on the vehicle interior side. The airbag includes a gas supply passage that is connected to the inflator, a plurality of inflatable portions that are connected to the gas supply passage to protect the occupant's head, and a non-inflatable portion that connects the plurality of inflatable portions to each other. Therefore, the occupant's head is protected by the inflating part.

  Here, in the present invention, an extension cell is provided below the inflatable portion that protects the head portion of the airbag in the deployed state, and the extension cell has a smaller thickness than the inflatable portion that protects the head portion. The seat is securely deployed between the stored occupant seat and the side of the passenger compartment. That is, the extension cell having a thickness smaller than that of the inflating portion that protects the head is reliably deployed between the passenger seat seat stored in the side portion on the vehicle interior side and the side portion on the vehicle interior side. The passenger seat is not ridden on the seat where the airbag is stored.

  Thus, according to the present invention, when the airbag is deployed, the stored occupant seating seat and the side portion on the vehicle interior side are not ridden on the occupant seating seat in which the deployed airbag is stored. Deploy between. For this reason, the expansion | deployment of the other expansion | swelling part mutually connected by the non-expansion part to the expansion | swelling part in which the cell expand | deployed between the stored passenger seat and the vehicle interior side side part is also performed reliably. . As a result, the airbag is surely deployed between the occupant head and the vehicle body side with respect to an occupant seated on a seat other than the stored occupant seat (particularly forward).

  According to a second aspect of the present invention, in the head protection airbag device according to the first aspect, the extension cell is smaller in width in the vehicle front-rear direction than the inflating portion protecting the head, and the lower portion of the extension cell. Is provided with a delay cell that extends toward the front of the vehicle toward the vehicle interior side in a region below the vehicle from the door belt line.

  In the present invention, the width of the extension cell in the vehicle front-rear direction is smaller than the width in the vehicle front-rear direction of the inflating portion that protects the head, so that the extension cell is stored on the side of the passenger compartment, Quickly deploy between the side of the passenger compartment. In addition, a delay cell provided from the lower part of the extension cell toward the front of the vehicle extends to the vehicle interior side in a region below the vehicle from the door belt line. As a result, when the head of the occupant seated on the occupant seat in the use position hits the airbag and a load acts on the airbag from the vehicle interior to the vehicle exterior, the delay cell It hits the region below the vehicle from the door belt line at the side of the vehicle and effectively holds the occupant in the passenger compartment.

  In the head protection airbag device according to the first aspect of the present invention, the airbag is deployed between the occupant head and the vehicle body side without riding on the stored occupant seat.

  The head protection airbag device according to the second aspect of the present invention can effectively hold an occupant in the passenger compartment.

  A head protection airbag device according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

  In these drawings, an arrow FR appropriately shown indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow IN indicates the vehicle width inner side direction.

  FIG. 1 is a side view showing a state where the head protection airbag device 10 according to the present embodiment is activated and the airbag 16 is deployed (the third row seat 34 is not stored). 2 is an enlarged cross-sectional view showing a state in which the third-row sheet 34 is stored along the line 2-2 in FIG.

  As shown in FIG. 1, a head protection airbag device 10 is connected to a columnar inflator 12 that ejects gas when activated, and a gas ejection part of the inflator 12, and is normally folded in the vehicle vertical direction. And an airbag 16 that is elongated along the vehicle front-rear direction and is stored along the roof side rail portion 14.

  The inflator 12 is used when a side collision state is detected by a side collision sensor (not shown) arranged at a predetermined position on the side of the vehicle body or when a vehicle rollover is detected by a rollover sensor (not shown) arranged near the center of the vehicle body. When the state is detected, it is actuated by an airbag control device (not shown).

  Fixed points 18 are set at predetermined intervals on the outer peripheral upper edge of the airbag 16. At these fixed points 18, the airbag 16 has a front pillar (A pillar) 20, a roof side rail portion 14, and a D pillar. 22 is supported by a body side component.

  The airbag 16 also includes a front-side inflatable portion (front-seat inflatable portion) 28 that protects the head portion 27A of the occupant 27 seated on the front seat 26 and a head portion 31A of the occupant 31 seated on the second-row seat 30. A central inflating portion (second row seat inflating portion) 32 and a rear side inflating portion (third row seat) protecting a head 35A of an occupant 35 seated on a third row seat 34 as an occupant seating seat Expansion part) 36, a rectangular flat non-expansion part 40 disposed between the front expansion part 28 and the central expansion part 32, and the central expansion part 32 and the rear expansion part 36. The rectangular flat non-inflatable portion 42 extends in the vehicle front-rear direction along the upper portion of the airbag 16 and communicates the front-side inflatable portion 28, the central inflatable portion 32, and the rear-side inflatable portion 36 at the upper end side. And an upper end side expansion portion 46 as a gas supply passage. There.

  Further, a gas introduction part 47 connected to the gas ejection part of the inflator 12 is provided at the middle part in the front-rear direction of the upper end side inflating part 46 of the airbag 16. The gas introduction part 47 is fixed to the vehicle body side by a pair of mounting brackets 49 in a state where the gas ejection part of the inflator 12 is inserted. That is, in the head protection airbag device 10 of the present embodiment, an inflator center arrangement type in which the inflator 12 is disposed near the upper edge side center of the airbag 16 is employed.

  Note that the lower end 16A of the airbag 16 is positioned below the vehicle from the belt line passing through the lower end 88A of the side window opening 88 (the upper end of the door panel). Further, the lower end 28A of the front side expansion portion 28 and the lower end 32A of the central expansion portion 32 are also positioned below the vehicle from the belt line passing through the lower end 88A of the side window opening 88 (the upper end of the door panel).

  The third row seat 34 is divided at the center in the vehicle width direction, and as shown by the solid line in FIG. 1, the divided left and right portions are respectively mounted on the vehicle interior side with the headrests 34A attached thereto. It can be stored on the left and right sides. In FIG. 1, the right half of the third row seat 34 stored on the right side of the vehicle is shown.

  As shown in FIG. 2, in the retracted state, the seat back 34B of the third row seat 34 is folded on the seat portion of the seat cushion 34C.

  As shown in FIG. 1, in the retracted state, the seat cushion 34C of the third row seat 34 is flipped up starting from the outer side in the vehicle width direction, and the seat is moved outward from the seat cushion 34C in the vehicle width direction. The back 34B is folded. Further, the upper end 34D of the third row seat 34 that has been flipped up is positioned above the vehicle from the belt line that passes through the lower end 88A of the side window opening 88 (the upper end of the door panel).

  As shown in FIG. 2, the seat back 34 </ b> B of the third row seat 34 in the retracted state is stored with a slight gap M <b> 1 at the vehicle interior side of the side window glass 90, and the seat back 34 </ b> B and the side window glass are stored. The airbag 16 is deployed between the airbag 90 and the vehicle 90.

  The roof side rail 70 constituting the skeleton member of the roof side rail portion 14 has a closed cross-sectional structure by a roof side rail inner panel 72 disposed on the vehicle interior side and a roof side rail outer panel 74 disposed on the vehicle exterior side. An opening trim 75 is fitted to the lower flange portions of the two. The folded airbag 16 (not shown) is fixed to the roof side rail inner panel 72 by fastening means 73 such as bolts. Further, the edge portion 78 </ b> A of the roof head lining 78 is engaged with the opening trim 75, and the folded airbag 16 is covered with a terminal portion 78 </ b> B of the roof head lining 78.

  In addition, the code | symbol 71 of FIG. 2 has shown the roof panel.

  As shown in FIG. 1, the front-side expansion portion 28 is configured by arranging three cylindrical cells 50, 52, 54 extending in the vehicle vertical direction adjacent to each other in the vehicle front-rear direction.

  The cell is an inflated portion that is inflated by the gas from the inflator, and does not include a non-inflatable portion that constitutes the outer peripheral edge of the inflated portion.

  The two cells 50 and 52 on the front side are each opened at the upper end portion and connected to the front portion 46A of the upper end side expansion portion 46. The front portion 46A of the upper end side expansion portion 46 is connected to the upper end side expansion portion. 46 is the vehicle front side of the connecting portion 46B with the inflator 12. The rear cell 54 has a front lower end connected to a rear lower end of the cell 52 by a connecting portion 56.

  Accordingly, the gas ejected from the inflator 12 (arrow W1 in FIG. 1) passes through the upper end side inflating portion 46 and flows into the two cells 50 and 52 on the front side from the vehicle upper side, and is connected to the cell 52. To flow into the cell 54.

  The central inflating part 32 is configured by arranging two cylindrical cells 62 and 64 extending in the vehicle vertical direction adjacent to each other in the vehicle front-rear direction. The front cell 62 is opened at the upper end, and is connected to the middle part in the front-rear direction of the upper end inflating portion 46, and the rear cell 64 is connected to the rear lower portion of the cell 62 by the connecting portion 67. It is connected. In addition, the upper part of the cell 64 on the rear side is a connection part 46 </ b> B with the inflator 12 in the upper end side expansion part 46.

  Accordingly, the gas ejected from the inflator 12 (arrow W2 in FIG. 1) passes through the upper end side inflating portion 46 and flows into the cell 62 on the front side from the upper side of the vehicle, and the rear lower portion of the cell 62 and the front lower portion of the cell 64. From the connecting part 67 that connects the two, the cell 64 flows into the cell 64.

  The rear-side inflating portion 36 is configured by arranging two cylindrical cells 76 and 77 extending in the vehicle vertical direction adjacent to each other in the vehicle front-rear direction. The two cells 76 and 77 each have an upper end opened and connected to a rear portion 46C of the upper end side inflating portion 46. The rear portion 46C of the upper end side inflating portion 46 is connected to the inflator 12 in the upper end side inflating portion 46. This is the vehicle rear side of the connecting portion 46B. A constricted portion 81 is formed between the cell 76 and the cell 77 in the rear portion 46 </ b> C of the upper end side expansion portion 46. The cross-sectional area S1 when the throttle part 81 is viewed from the front-rear direction of the vehicle is smaller than the cross-sectional area S2 when the rear part 46C of the upper end side expansion part 46 is viewed from the front-rear direction of the vehicle.

  Accordingly, the gas (arrow W3 in FIG. 1) ejected from the inflator 12 passes through the upper end side inflating portion 46 and flows into the two cells 76 and 77 from above the vehicle. Further, since the sectional area S1 when the throttle part 81 is expanded is smaller than the sectional area S2 when the rear part 46C of the upper end side expansion part 46 is expanded, the cell 76 precedes the cell 77 and moves downward in the vehicle. It has come to expand.

  The rear cell 77 extends over the upper end 80A of the D-pillar garnish 80 and expands to the vehicle interior side. The lower end 77A of the cell 77 is near the upper end 34D of the stored third row seat 34. It has come to expand to.

  Further, the upper part of the cell 76 on the front side is an inflating portion 76A that protects the head 35A of the occupant 35, and is developed between the head 35A of the occupant 35 and the side window glass 90. . Further, the lower end 76B of the expansion portion 76A of the cell 76 is developed in the vicinity of the upper end 34D of the stored third row sheet 34.

  As shown in FIG. 2, an extension cell 79 is provided at the rear of the lower end 76B of the expansion portion 76A in the cell 76 toward the vehicle lower side. The thickness (length along the vehicle width direction) K1 of the extension cell 79 is smaller than the thickness K2 of the inflating portion 76A that protects the head, and the seat back of the stored third row seat 34 is stored. 34B and the side window glass 90 and the upper part 91A of the quarter panel garnish 91 which are side portions on the vehicle interior side are developed.

  As shown in FIG. 1, the vehicle front-rear direction width L1 of the upper portion 79A of the extension cell 79 is smaller than the vehicle front-rear direction width L2 of the expansion portion 76A. A delay cell 83 is provided from the lower portion 79B of the extension cell 79 toward the front of the vehicle.

  The lower part of the delay cell 83 is developed to the vehicle interior side of the upper part 91A of the quarter panel garnish 91 in a region below the lower end 88A of the side window opening 88 serving as a door belt line. The front end 83A of the delay cell 83 extends from the inflating portion 76A toward the front of the vehicle.

  Therefore, since the vehicle front-rear width L1 of the extension cell 79 is smaller than the vehicle front-rear width L2 of the inflating portion 76A that protects the head, the extension cell 79 expands in the vehicle downward direction in a short time. As a result, the extension cell 79 includes a seat back 34B of the third row seat 34 stored in the side portion on the vehicle interior side, a side window glass 90 serving as a side portion on the vehicle interior side, and an upper portion 91A of the quarter panel garnish 91. Deploy quickly in between.

  For this reason, the rear side inflating portion 36 having the extension cell 79 that extends between the stored third row seat 34 and the side window glass 90 that is the side portion on the vehicle interior side and the upper portion 91A of the quarter panel garnish 91 is not attached. The expansion of the central expansion part 32 connected to each other by the expansion part 42 is also performed reliably.

  In addition, the lower part of the delay cell 83 provided from the lower part 79B of the extension cell 79 toward the front of the vehicle is located in the region below the lower end 88A of the side window opening 88 serving as a door belt line. The upper part 91 </ b> A is deployed on the vehicle interior side. Accordingly, the head 35A of the occupant 35 seated on the third row seat 34 in the use position hits the inflated portion 76A of the cell 76 of the airbag 16, and the vehicle body from the vehicle interior side contacts the inflated portion 76A of the cell 76 of the airbag 16. When a load is applied toward the outside, the delay cell 83 hits the upper portion 91A of the quarter panel garnish 91 so as to effectively hold the occupant 35 in the vehicle interior.

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

  When the side collision or rollover of the vehicle occurs, the state is detected by the side collision sensor or rollover sensor and input to the airbag control device. When the airbag control device determines that a side collision or rollover has occurred, the inflator 12 is activated and gas is supplied into the airbag 16 stored in a folded state along the roof side rail portion 14 of the vehicle.

  Specifically, the gas is supplied from the gas introduction portion 47 of the airbag 16 to inflate the upper end side inflating portion 46, the front side inflating portion 28, the central inflating portion 32, and the rear side inflating portion 36. 16 is deployed in a curtain shape toward the vehicle lower side on the side of the vehicle interior side. Accordingly, the head 27A of the occupant 27 seated on the front seat 26 is protected by the front-side inflating portion 28, and the head 31A of the occupant 31 seated on the second-row seat 30 is protected by the central inflating portion 32. A head portion 35 </ b> A of the occupant 35 seated on the eye seat 34 is protected by the rear side expansion portion 36.

  Here, in the head protection airbag device 10 according to the present embodiment, the third row seat 34 is stored in the side portion on the vehicle interior side, and the seat back 34B and the side of the third row seat 34 in the stored state are stored. Since the gap M1 with the wind glass 90 is narrow, there is a possibility of riding on the seat back 34B of the third row seat 34 in which the airbag 16 being deployed is stored.

  However, in the present embodiment, as shown in FIG. 1, when the expansion part 46 is viewed from the front-rear direction of the vehicle, the throttle part 81 formed between the cell 76 and the cell 77 in the rear part 46 </ b> C of the upper end side inflating part 46. The area S1 is smaller than the cross-sectional area S2 when the rear portion 46C of the upper end side expansion portion 46 is viewed from the vehicle front-rear direction. For this reason, the cell 76 is advanced toward the vehicle lower side in advance of the cell 77.

  The thickness (length along the vehicle width direction) K1 of the extension cell 79 provided at the rear portion of the lower end 76B of the expansion portion 76A in the cell 76 toward the vehicle lower side of the expansion portion 76A that protects the head. Since the extension cell 79 is smaller than the thickness K2, the extension cell 79 has a seat back 34B of the stored third row seat 34, an upper portion of the side window glass 90 and the quarter panel garnish 91 which are side portions on the vehicle interior side. Deploy securely with 91A. As a result, the airbag 16 that is in the process of being deployed does not ride on the third row seat 34 in which the airbag 16 is stored.

  As described above, in the present embodiment, the rider does not ride on the third row seat 34 in which the airbag 16 being deployed is stored, and between the head 31A of the occupant 31 seated on the second row seat 30 and the side window glass 90. Expand to. For this reason, the rear side inflating portion 36 having the extension cell 79 that extends between the stored third row seat 34 and the side window glass 90 that is the side portion on the vehicle interior side and the upper portion 91A of the quarter panel garnish 91 is not attached. The expansion of the central inflatable portion 32 connected to each other by the inflatable portion 42 is also performed reliably. As a result, the airbag 16 is reliably deployed between the head 31A of the occupant 31 seated on the second row seat 30 and the side of the vehicle body.

  Further, in the present embodiment, the vehicle front-rear width L1 of the extension cell 79 is smaller than the vehicle front-rear width L2 of the inflating portion 76A that protects the head. For this reason, the extension cell 79 expands in a short time toward the vehicle lower side. As a result, the seatback 34B of the third row seat 34 stored in the side portion on the vehicle interior side is extended between the side window glass 90 and the upper portion 91A of the quarter panel garnish 91 on the side portion on the vehicle interior side. Cell 79 can be deployed quickly.

  In addition, the lower part of the delay cell 83 provided from the lower part 79B of the extension cell 79 toward the front of the vehicle is located in the region below the lower end 88A of the side window opening 88 serving as a door belt line. It expands to the vehicle interior side of the upper part 91A. As a result, the head 35A of the occupant 35 seated on the third-row seat 34 in the use position indicated by the two-dot chain line in FIG. 1 is applied to the inflating portion 76A of the cell 76 of the airbag 16 when the vehicle rolls over. When a load is applied from the vehicle interior side toward the vehicle exterior side and a load is applied to the inflated portion 76A of the cell 76 of the airbag 16 from the vehicle interior side toward the vehicle body outside, the delay cell 83 is connected to the quarter panel garnish 91. When hitting the upper portion 91A, the movement of the inflating portion 76A from the vehicle interior side to the vehicle interior outside is suppressed. For this reason, the passenger | crew 35 can be effectively hold | maintained in a vehicle interior.

  Next, a head protection airbag device according to a second embodiment of the present invention will be described with reference to FIG.

  FIG. 3 shows a side view of a state in which the head protection airbag device 10 according to the present embodiment is activated and the airbag 16 is deployed.

  In addition, about the same member as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 3, in the present embodiment, the lower end 16 </ b> A of the airbag 16 is positioned above the vehicle from the belt line passing through the lower end 88 </ b> A (upper end of the door panel) of the side window opening 88. Therefore, the delay cell 83 shown in FIG. 1 (in the first embodiment) is not formed below the extension cell 79.

  Therefore, in this embodiment, when the airbag 16 is deployed, the extension cell 79 is rapidly deployed toward the lower side of the vehicle, and the seat back 34B of the stored third row seat 34 and the side serving as the side portion on the vehicle interior side are provided. It develops between the wind glass 90. Therefore, the airbag 16 in the middle of deployment does not ride on the third row seat 34 in which the airbag 16 is being deployed, and the airbag 16 is deployed between the head 31 </ b> A of the occupant 31 seated on the second row seat 30 and the side window glass 90.

  In the above, the present invention has been described in detail for specific embodiments. However, the present invention is not limited to the above-described embodiments, and various other embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art. For example, in each of the above-described embodiments, the present invention is applied to a vehicle having a three-row seat such as the front seat 26, the second-row seat 30, and the third-row seat 34. The present invention may be applied to a vehicle having a seat row.

  Moreover, in each said embodiment, although the structure which inserts and fixes the gas ejection part of the inflator 12 directly to the gas introducing | transducing part 47 of the airbag 16 was taken, it is not restricted to this, gas is provided via a diffuser (pipe) etc. You may take the structure which connects the introducing | transducing part 47 and the inflator 12. FIG. Further supplementally, in each of the above embodiments, an inflator center arrangement type in which the inflator 12 is arranged in the vicinity of the middle portion in the front-rear direction on the upper edge side of the airbag 16 is adopted. You may take the structure arrange | positioned in other positions, such as an installation position.

  Moreover, in each said embodiment, although the structure which jets gas from the one inflator 12 to the airbag 16 was taken, it is not restricted to this, The structure which jets gas from the two or more inflator 12 to the airbag 16 is taken. May be taken.

  Moreover, in each said embodiment, although the airbag 16 was made into the integral structure, you may take the structure which divided not only this but the airbag 16 into the vehicle front and back.

  In each of the above embodiments, the present invention is applied to a configuration in which the seat back 34B of the third row seat 34 in the retracted state is stored with a slight gap on the vehicle interior side of the side window glass 90. The present invention is not limited to this, and a configuration in which a sheet other than the third row seat 34 in the retracted state is stored with a slight clearance on the vehicle interior side other than the side window glass 90 on the vehicle interior side is provided. May be applied.

  Further, the number and shape of the cells constituting the front side expansion portion 28, the central expansion portion 32, and the rear side expansion portion 36 in each of the above embodiments are not limited to the numbers and positions shown in FIGS.

It is a side view which shows the state which the head protection airbag apparatus which concerns on 1st Embodiment of this invention act | operates, and the airbag was expand | deployed. FIG. 2 is an enlarged cross-sectional view taken along a line 2-2 in FIG. It is a side view which shows the state which the head protection airbag apparatus which concerns on 2nd Embodiment of this invention act | operates, and the airbag was expand | deployed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Head protection airbag apparatus 12 Inflator 14 Roof side rail part 16 Air bag 28 The front side expansion part of an airbag 32 The center expansion part of an airbag 36 The rear side expansion part of an airbag 42 The non-expansion part of an airbag 46 Air bag Upper end side expansion part (gas supply passage)
47 Air bag gas introduction part 34 3rd row seat (occupant seat)
34B Seat back of the third row seat 76 cell 76A Expansion part protecting the occupant's head of the cell 77 cell 79 extension cell 79A upper part of the extension cell 79B lower part of the extension cell 83 delay cell 83A front end of the delay cell 88 side window opening 88A Bottom edge of side window opening 90 Side window glass 91 Quarter panel inner garnish

Claims (2)

An inflator that is disposed at a predetermined position of the vehicle and that is activated at the time of a side collision or rollover of the vehicle and ejects gas;
A gas supply passage connected to the inflator; a plurality of inflatable portions that are connected to the gas supply passage to protect the head of an occupant; and a non-inflatable portion that connects the plurality of inflatable portions to each other. The vehicle is stored along the roof side rail portion of the vehicle in a state of being folded in the vehicle vertical direction, and is expanded by supply of gas from the inflator and is deployed toward the vehicle lower side toward the vehicle interior side. An airbag that is deployed between an occupant seating seat partially stored in a side portion on the vehicle interior side and a side portion on the vehicle interior side;
With
The airbag is provided below the inflatable portion that protects the head portion of the airbag in the deployed state, and has a smaller thickness than the inflatable portion that protects the head portion, and is used for the stored passenger seating. A head protection airbag device having an extension cell that extends between a seat and a side portion on the vehicle interior side.   The extension cell has a smaller width in the vehicle front-rear direction than the inflatable part protecting the head, and extends from the lower part of the extension cell toward the front of the vehicle toward the vehicle interior side in the region below the vehicle from the door belt line. The head protection airbag device according to claim 1, wherein a delay cell is provided.

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