JP4727530B2 - Head protection airbag device - Google Patents

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, an occupant'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, a portion of the airbag that is deployed between the pillar portion and the headrest of the seat in use is formed into a thin plate-like shape that does not allow gas to flow at the initial stage of deployment. The air bag is prevented from being caught on the headrest of the seat in use by deploying in a state and then allowing gas to flow in from an inflow port formed on the lower end side.
Japanese Patent No. 3656156

  However, in a vehicle equipped with a seat storage mechanism that folds the seat back onto the seat cushion and flips the entire seat to a position along the side wall of the passenger compartment, to prevent the airbag being deployed from being caught on the stored seat Measures are required.

  In view of the above facts, the present invention has an object to obtain a head protection airbag device that can deploy an airbag between an occupant head and a vehicle body side without being caught by a stored occupant seat. It is.

A head protection airbag device according to a first aspect of the present invention is disposed at a predetermined position of a vehicle, and operates in the event of a side collision or rollover of the vehicle to inject gas and a headrest is attached. An occupant seating seat stored in a side portion on the vehicle interior side, a gas supply passage connected to the inflator, and an inflating portion connected to the gas supply passage and protecting the occupant's head. 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 the supply of gas from the inflator and is expanded toward the vehicle lower side on the side portion on the vehicle interior side. A non-inflatable portion that enters between the headrest and the pillar portion of the stored occupant seating seat in the deployed state, and the airbag. Wherein provided on the vehicle rear side of the non-inflatable portion, in the vehicle vertical direction and extends in a cylindrical shape to have a, an induction cell for developing the non-inflatable portion, deployed the unexpanded to the vehicle below the induction cells in It is characterized in that it is faster than the expansion of the inflatable part provided on the vehicle front side of the non-inflatable part adjacent to the part to the vehicle lower side .

  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. Since the airbag includes a gas supply passage connected to the inflator and an inflating portion that is connected to the gas supply passage and protects the head of the occupant, the occupant's head is protected by the inflating portion. The

  Here, in the present invention, since the occupant seating seat is stored in the side portion on the vehicle interior side with the headrest attached, there is a possibility that the airbag in the middle of deployment may be caught by the headrest of the occupant seating seat storing the airbag. There is.

However, in the present invention, the non-inflatable portion provided in the airbag enters between the headrest and the pillar portion of the stored passenger seat, and is provided on the vehicle rear side of the non-inflatable portion in the airbag. The induction cell extends in a cylindrical shape in the vertical direction of the vehicle and expands the non-inflatable portion. In other words, since the portion that enters between the headrest and the pillar portion of the airbag that may be caught by the headrest of the stored passenger seat is a non-inflatable portion, the airbag that is being deployed is caught by the headrest. There is no. In addition, on the vehicle rear side of the non-inflatable portion that overlaps the headrest of the stored passenger seat, the induction cell rapidly expands from the upper side of the vehicle toward the lower side of the vehicle, thereby non-inflating between the headrest and the pillar portion. The part can be inserted quickly. Further, since the deployment of the induction cell to the vehicle lower side is faster than the expansion of the inflatable portion provided on the vehicle front side of the non-inflatable portion adjacent to the non-inflatable portion to the vehicle lower side, This precedes the expansion of the inflatable portion that develops to the side of the vehicle downward to the vehicle. As a result, it is possible to insert the non-inflatable portion of the airbag between the headrest and the pillar portion of the stored occupant seating seat prior to the deployment of the inflatable portion that is deployed on the side of the occupant head. The inflatable part that develops on the side of the occupant's head also deploys quickly.

  Thus, according to the present invention, when the airbag is deployed, it is deployed between the occupant head and the vehicle body side without being caught by the headrest of the occupant seating seat in which the airbag being deployed is stored. .

According to a second aspect of the present invention, in the head protection airbag device according to the first aspect, a cross-sectional area of the induction cell cut horizontally along the vehicle front-rear direction is provided on the vehicle front side of the non-inflatable portion. It is characterized in that it is smaller than the cross-sectional area cut horizontally along the vehicle longitudinal direction of the inflated portion .

In the present invention, the cross-sectional area of the induction cell cut horizontally along the vehicle front-rear direction is smaller than the cross-sectional area cut horizontally along the vehicle front-rear direction of the inflatable portion provided on the vehicle front side of the non-inflatable portion. For this reason, the deployment of the induction cell precedes the deployment of the inflating portion that develops on the side of the passenger's head to the vehicle lower side. As a result, it is possible to insert the non-inflatable portion of the airbag between the headrest and the pillar portion of the stored occupant seating seat prior to the deployment of the inflatable portion that is deployed on the side of the occupant head. The inflatable part that develops on the side of the occupant's head also deploys quickly.

According to a third aspect of the present invention, the head protection airbag device of the present invention is disposed at a predetermined position of the vehicle, and operates in the event of a side collision or rollover of the vehicle and ejects gas, and a headrest is attached. An occupant seating seat stored in a side portion on the vehicle interior side, a gas supply passage connected to the inflator, and an inflating portion connected to the gas supply passage and protecting the occupant's head. 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 the supply of gas from the inflator and is expanded toward the vehicle lower side on the side portion on the vehicle interior side. comprising an airbag, wherein the airbag includes an insertion cell gas supply unit is formed at a lower position than the head rest, the car of the insertion cells in the airbag Anda gas supply cell for supplying a gas into said insertion cell through the gas supply unit while deployed to the rear in a cylindrical shape extending in the partitioned vehicle vertical direction by the joint, the insertion cell wherein while deployed It is characterized by entering between the headrest and the pillar portion of the stored passenger seat.

  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. Since the airbag includes a gas supply passage connected to the inflator and an inflating portion that is connected to the gas supply passage and protects the head of the occupant, the occupant's head is protected by the inflating portion. The

  Here, in the present invention, since the occupant seating seat is stored in the side portion on the vehicle interior side with the headrest attached, there is a possibility that the airbag in the middle of deployment may be caught by the headrest of the occupant seating seat storing the airbag. There is.

However, in the present invention, the gas supply portion is formed at a position below the headrest in the insertion cell that enters between the headrest and the pillar portion of the stored occupant seat when the airbag is deployed. Through the gas supply unit, gas is supplied into the insertion cell from a gas supply cell that is provided on the vehicle rear side of the insertion cell and that is partitioned by the joint and extends in a cylindrical shape extending in the vehicle vertical direction. That is, since the insertion cell that may be caught by the headrest of the stored passenger seat is deployed from a position below the headrest by the gas supplied from the gas supply cell, the airbag in the middle of deployment cannot be caught by the headrest. Absent. Further, since the gas supply cell is rapidly deployed from the upper side of the vehicle toward the lower side of the vehicle, the insertion cell can be rapidly deployed between the headrest and the pillar portion by the gas supplied from the gas supply cell.

  Thus, according to the present invention, when the airbag is deployed, it is deployed between the occupant head and the vehicle body side without being caught by the headrest of the occupant seating seat in which the airbag being deployed is stored. .

According to a fourth aspect of the present invention, there is provided a head protection airbag device according to the present invention, which is disposed at a predetermined position of a vehicle and operates at the time of a side collision or rollover of the vehicle and jets gas, The seat includes a stored passenger seat, a gas supply passage connected to the inflator, and an inflating portion connected to the gas supply passage and protecting the head of the passenger, and is folded in the vehicle vertical direction. An airbag that 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 deployed toward the vehicle lower side on the side portion on the vehicle interior side, The airbag is provided on a vehicle rear side of the non-inflatable portion in the airbag, a non-inflatable portion that enters between the stored occupant seat and the pillar portion in a deployed state, Vertically extending into a tubular shape have a an induction cell for developing the non-inflatable portion, expansion of the vehicle below the induction cell adjacent to the non-inflatable portion is provided on the vehicle front side of the non-inflatable portion It is characterized in that it is faster than the expansion of the inflated portion formed below the vehicle .

  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. Since the airbag includes a gas supply passage connected to the inflator and an inflating portion that is connected to the gas supply passage and protects the head of the occupant, the occupant's head is protected by the inflating portion. The

  Here, in the present invention, since the occupant seating seat is stored in the side portion on the vehicle interior side with the headrest removed, there is a possibility that the airbag being deployed is caught on the occupant seating seat.

However, in the present invention, the non-inflatable portion provided in the airbag enters between the stored occupant seating seat and the pillar portion, and the induction cell provided on the vehicle rear side of the non-inflatable portion in the airbag. Extends in a cylindrical shape in the vehicle vertical direction to expand the non-inflatable portion. That is, the portion of the airbag that may be caught by the stored occupant seating seat between the stored occupant seating seat and the pillar portion is a non-inflatable portion. It does not get caught in the stored passenger seat. In addition, on the vehicle rear side of the non-inflatable portion that overlaps with the stored occupant seating seat, the induction cell is rapidly deployed from the upper side of the vehicle toward the lower side of the vehicle, so that the stored occupant seating seat and the pillar portion A non-expandable part can be quickly inserted between them. Further, since the deployment of the induction cell to the vehicle lower side is faster than the expansion of the inflatable portion provided on the vehicle front side of the non-inflatable portion adjacent to the non-inflatable portion to the vehicle lower side, This precedes the expansion of the inflatable portion that develops to the side of the vehicle downward to the vehicle. As a result, it is possible to insert the non-inflatable portion of the airbag between the stored occupant seating seat and the pillar portion prior to the deployment of the inflatable portion that is deployed on the side of the occupant head. The inflatable portion that develops on the side of the head also quickly deploys.

Thus, according to the present invention, when the airbag is deployed, it is deployed between the occupant head and the vehicle body side without being caught by the occupant seating seat in which the deployed airbag is stored.
According to a fifth aspect of the present invention, in the head protection airbag device according to the fourth aspect, a cross-sectional area of the induction cell that is cut horizontally along the vehicle front-rear direction is provided on the vehicle front side of the non-inflatable portion. It is characterized in that it is smaller than the cross-sectional area cut horizontally along the vehicle longitudinal direction of the inflated portion.
In the present invention, the cross-sectional area of the induction cell cut horizontally along the vehicle front-rear direction is smaller than the cross-sectional area cut horizontally along the vehicle front-rear direction of the inflatable portion provided on the vehicle front side of the non-inflatable portion. For this reason, the deployment of the induction cell precedes the deployment of the inflating portion that develops on the side of the passenger's head to the vehicle lower side. As a result, it is possible to insert the non-inflatable portion of the airbag between the stored occupant seating seat and the pillar portion prior to the deployment of the inflatable portion that is deployed on the side of the occupant head. The inflatable portion that develops on the side of the head also quickly deploys.

  The head protection airbag device according to the first aspect of the present invention can deploy the airbag between the occupant head and the vehicle body side without being caught by the headrest of the stored occupant seat.

  The head protection airbag device according to the second aspect of the present invention can quickly deploy the airbag between the passenger's head and the vehicle body side without being caught by the headrest of the stored passenger seat. .

  The head protection airbag device according to the third aspect of the present invention can deploy the airbag between the occupant head and the vehicle body side without being caught by the headrest of the stored occupant seat.

The head protection airbag device according to the fourth aspect of the present invention can deploy the airbag between the occupant head and the side of the vehicle body without being caught by the stored occupant seat.
The head protection airbag device according to the fifth aspect of the present invention can quickly deploy the airbag between the occupant head and the vehicle body side without being caught by the stored occupant seat.

  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 shows a side view of a state where the head protection airbag device 10 according to the present embodiment is activated and the airbag 16 is deployed, and FIG. An enlarged cross-sectional view along is shown.

  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.

  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, and the headrest 34A is attached to the front end of the seat back 34B.

  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. The third row seat 34 is provided with three headrests 34A, of which the headrest 34A at the center in the vehicle width direction is supported by a stay 34D on a seat back 34B stored on the right side (cantilevered). Supported). Accordingly, the upper end 34E of the headrest 34A at the center in the vehicle width direction in the retracted state reaches the inner side in the vehicle width of the upper portion of the C pillar garnish 24 as the pillar portion.

  As shown in FIG. 2, the headrest 34 </ b> A at the center in the vehicle width direction in the retracted state is disposed with a slight gap M <b> 1 inside the C pillar garnish 24 in the vehicle width direction, and the headrest 34 </ b> A and the C pillar garnish 24 are located. The airbag 16 is deployed between the two.

  In addition, the code | symbol 37 of FIG. 2 has shown C pillar, and the code | symbol 39 has shown the window glass.

  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 front and rear cells 50 and 54 are each open at the upper end and connected to the front part 46A of the upper end side expansion part 46. The front part 46A of the upper end side expansion part 46 is connected to the upper end side expansion part 46. The connecting portion 46B with the inflator 12 is on the vehicle front side. The central cell 52 has a substantially vertical central portion connected to a substantially vertical central portion of the cell 50 by a connecting portion 56, and the central cell 52 has a substantially vertical central portion of the cell 54. Are connected to each other by a connecting portion 57.

  Accordingly, the gas W1 ejected from the inflator 12 passes through the upper end side expansion portion 46 and flows into the two front and rear cells 50 and 54 from above the vehicle, and flows into the cell 52 from the connection portion 56 with the cell 50. It flows into the cell 52 from the connecting portion 57 with the cell 54.

  The central inflating portion 32 has two cylindrical cells 62 and 64 extending in the vehicle up-down direction adjacent to each other in the vehicle front-rear direction and a non-inflating portion 65 extending in the vehicle up-down direction on the vehicle rear side of the cell 64. It is configured by disposing a cell 66 as a cylindrical induction cell that extends in the vertical direction of the vehicle. The front and rear cells 62 and 66 each have an upper end opened, and are connected to an intermediate portion in the front-rear direction of the upper end side inflating portion 46. It has become. In addition, the center cell 64 is connected to the rear side of the cell 62 by a gas supply unit 67 on the front side of the substantially vertical central portion.

  Accordingly, the gas W2 ejected from the inflator 12 passes through the upper end side inflating portion 46 and flows into the front and rear cells 62 and 66 from the upper side of the vehicle. It flows into the cell 64 from the gas supply part 67 which connects the front side of the direction center part.

  Further, in a side view of the vehicle with the airbag 16 deployed, the cell 64 is deployed on the vehicle front side of the headrest 34A of the stored third row seat 34, and the front portion of the cell 66 is stored. The third row seat 34 is expanded to a position overlapping the rear portion of the headrest 34A.

  As shown in FIG. 2, the cross-sectional area S1 of the cell 66 is smaller than the cross-sectional area S2 of the cell 64, and the deployment of the cell 66 below the vehicle is faster than the deployment of the cell 64 below the vehicle. ing. The cell 64 extends between the head 31 </ b> A (see FIG. 1) of the occupant 31, the C pillar garnish 24, and the front window glass 39. Further, in the cell 66, on the vehicle rear side of the C pillar garnish 24, a part of the portion along the vertical direction extends between the headrest 34A of the third row seat 34 and the window glass 39 on the rear side. Yes.

  Accordingly, there is no cell in the portion of the airbag 16 between the C pillar garnish 24 and the headrest 34A that may be caught on the headrest 34A of the stored third row seat 34, and there is a non-inflatable portion 65. The airbag 16 is not caught on the headrest 34A. Further, since the cell 66 is rapidly deployed from the upper side of the vehicle to the lower side of the vehicle behind the non-inflatable portion 65 that overlaps the headrest 34A of the stored third row seat 34 in a side view, the C pillar garnish 24 and the headrest 34A The non-expandable portion 65 can be quickly inserted between the two.

  As shown in FIG. 1, the rear-side inflating portion 36 is configured by arranging two cylindrical cells 76 and 78 extending in the vehicle vertical direction adjacent to each other in the vehicle front-rear direction. The two cells 76 and 78 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.

  Accordingly, the gas W3 ejected from the inflator 12 passes through the upper end side expansion portion 46 and flows into the two cells 76 and 78 from above the vehicle.

  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 with the headrest 34A attached, and the headrest 34A and the C pillar garnish 24 are stored. Since the gap M1 is narrow, there is a possibility of being caught by the headrest 34A of the third row seat 34 in which the airbag 16 being deployed is stored.

  However, in the present embodiment, as shown in FIG. 2, the non-inflatable portion 65 provided in the airbag 16 enters between the headrest 34A of the stored third row seat 34 and the C pillar garnish 24, A cell 66 provided behind the non-inflatable portion 65 in the airbag 16 develops into a cylindrical shape extending in the vehicle vertical direction. That is, there is no cell at the portion between the headrest 34A and the C pillar garnish 24 in the airbag 16 that may be caught by the headrest 34A of the stored third row seat 34, and there is a non-inflatable portion 65. For this reason, the airbag 16 in the middle of deployment is not caught on the headrest 34A.

  In addition, the cross-sectional area S1 of the cell 66 is smaller than the cross-sectional area S2 of the cell 64 developed between the head 31A (see FIG. 1) of the occupant 31 and the C pillar garnish 24 and the windshield 39 on the front side. Therefore, the cell 66 is deployed faster in the lower part of the vehicle than the cell 64 is deployed in the lower part of the vehicle. Therefore, the cell 66 is rapidly deployed from the upper side of the vehicle toward the lower side of the vehicle behind the non-inflatable portion 65 as compared with the cell 64. For this reason, the non-expandable portion 65 can be quickly inserted between the C pillar garnish 24 and the headrest 34A.

  Therefore, in the present embodiment, when the airbag 16 is deployed, the airbag 16 being deployed is not caught by the headrest 34A of the stored third row seat 34, and the head of the occupant 31 of the second row seat 30 is It develops quickly between the part 31A and the wind glass 39.

  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, a cell 69 as an insertion cell that expands on the side of the head 31 </ b> A of the occupant 31 is expanded toward the rear of the vehicle and expands behind the C pillar garnish 24. It is adjacent to the cell 71 of the gas supply cell. That is, the non-inflatable portion 65 in the first embodiment is eliminated.

  The cell 69 has a lower end front side connected to the lower end rear side of the cell 62 by a gas supply unit 80, and the cell 69 has a lower end rear side connected to the lower end front side of the cell 71 by a gas supply unit 82.

  The gas supply units 80 and 82 are formed at a position below the headrest 34A, and the cell 69 is expanded from a position below the headrest 34A.

  Therefore, in the present embodiment, as in the first embodiment, the third row seat 34 is stored in the side portion on the vehicle interior side with the headrest 34A attached, and the gap between the headrest 34A and the C pillar garnish 24 Therefore, there is a possibility of being caught by the headrest 34A of the third row seat 34 in which the airbag 16 being deployed is stored.

  However, in the present embodiment, the gas supply unit is positioned below the headrest 34A in the cell 69 that enters between the headrest 34A of the stored third row seat 34 and the C pillar garnish 24 with the airbag 16 deployed. 80 and 82 are formed, and gas is supplied from the cells 62 and 71 into the cell 69 through these gas supply portions 80 and 82. That is, the cell 69 that may be caught by the headrest 34A of the stored third row seat 34 is inflated from a position below the headrest 34A by the gas supplied from the cells 62 and 71. The headrest 34A is not caught. Moreover, the cell 69 to which the gas is supplied from the cell 71 can be rapidly deployed by rapidly deploying the cell 71 from above the vehicle toward the bottom of the vehicle.

  Therefore, in the present embodiment, when the airbag 16 is deployed, the head 31A of the occupant 31 and the wind glass 39 are not caught on the headrest 34A of the third-row seat 34 in which the airbag 16 being deployed is stored. Deploy quickly between.

  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, as shown in FIG. 4, the front end 34F of the seat back 34B from which the headrest is removed during storage extends to the vehicle interior side of the C pillar garnish 24, and the front end 34F of the seat back 34B and the C pillar garnish 24 It is good also as a structure which the non-inflatable part 65 of the airbag 16 expand | deploys in between.

  Further, in each of the above embodiments, the present invention is applied to the three-row seat vehicle of 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.

  Further, in each of the above embodiments, the present invention is applied to a configuration in which the headrest 34A of the third row seat 34 in the retracted state is disposed with a slight gap on the inner side in the vehicle width direction of the C pillar garnish 24. Not limited to this, the headrests of the seats other than the third row seat 34 in the retracted state are arranged with a slight gap on the inner side in the vehicle width direction of the other pillar portions other than the C pillar garnish 24. The invention may be applied.

  In the second embodiment, the lower end of the cell 69 is connected to the rear end of the lower end of the cell 62 by the gas supply unit 80, and the lower end of the cell 69 is connected to the front end of the lower end of the cell 71. However, the present invention is not limited to this, and the cell 69 may have a configuration in which only the rear side on the lower end is connected to the front side on the lower end of the cell 71 by the gas supply unit 82.

  In each of the above embodiments, as shown in FIGS. 1 and 3, the lower end 16 </ b> A of the airbag 16 is positioned above the lower end edge 88 </ b> A of the window opening 88. A configuration may be adopted in which the lower end 16A of the bag 16 is located below the lower end edge 88A of the window opening 88.

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. It is sectional drawing corresponding to FIG. 2 which shows the head protection airbag apparatus which concerns on other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Head protection airbag apparatus 12 Inflator 14 Roof side rail part 16 Air bag 24 C pillar garnish (pillar part)
28 Front-side inflation portion of airbag 32 Central inflation portion of airbag 36 Rear-side inflation portion of airbag 46 Upper-end-side inflation portion (gas supply passage) of airbag
47 Air bag gas introduction part 34 3rd row seat (occupant seat)
34A Headrest of third row seat 64 cells 65 non-expandable portion 66 cells (induction cell)
69 cells (inserted cells)
71 cells (gas supply cell)
80 Gas supply part 82 Gas supply part

Claims (5)

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;
An occupant seating seat stored on the side of the passenger compartment with the headrest attached;
A roof side rail portion of the vehicle in a state of being folded in the vehicle vertical direction, including a gas supply passage connected to the inflator, and an inflating portion connected to the gas supply passage and protecting the head of the occupant And an airbag that is inflated by supply of gas from the inflator and is deployed toward the vehicle lower side on the side portion on the vehicle interior side, and
With
The airbag is provided on the vehicle rear side of the non-inflatable portion of the airbag, and a non-inflatable portion that enters between the headrest and the pillar portion of the stored occupant seating seat in the deployed state. An induction cell that extends in a cylindrical shape in the direction and expands the non-expanded portion;
Have a, and wherein the quick in comparison to the development deployment to the vehicle below the induction cell for the vehicle under the inflation portion provided in the vehicle front side of the non-inflatable portion adjacent to said non-inflatable portion Head protection airbag device. The cross-sectional area cut horizontally along the vehicle front-rear direction of the induction cell is smaller than the cross-sectional area cut horizontally along the vehicle front-rear direction of the expansion part provided on the vehicle front side of the non-expanded part. The head protection airbag device according to claim 1, wherein the head protection airbag device is a head protection airbag device. 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;
An occupant seating seat stored on the side of the passenger compartment with the headrest attached;
A roof side rail portion of the vehicle in a state of being folded in the vehicle vertical direction, including a gas supply passage connected to the inflator, and an inflating portion connected to the gas supply passage and protecting the head of the occupant And an airbag that is inflated by supply of gas from the inflator and is deployed toward the vehicle lower side on the side portion on the vehicle interior side, and
With
The airbag develops into an insertion cell in which a gas supply portion is formed at a position below the headrest , and a cylindrical shape that is partitioned by a joint portion on the vehicle rear side of the insertion cell in the airbag and extends in the vehicle vertical direction. And a gas supply cell that supplies gas to the insertion cell through the gas supply unit, and the insertion cell enters between the headrest and the pillar portion of the stored passenger seat in a deployed state. A head protection airbag device characterized by the above. 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;
An occupant seat seat stored on the side of the passenger compartment;
A roof side rail portion of the vehicle in a state of being folded in the vehicle vertical direction, including a gas supply passage connected to the inflator, and an inflating portion connected to the gas supply passage and protecting the head of the occupant And an airbag that is inflated by supply of gas from the inflator and is deployed toward the vehicle lower side on the side portion on the vehicle interior side, and
With
The airbag is provided on a vehicle rear side of the non-inflatable portion of the airbag in a non-inflatable portion that enters between the stored occupant seat and the pillar portion in a deployed state, and is arranged in a vehicle vertical direction. An induction cell extending in a cylindrical shape to expand the non-expanded portion;
Have a, and wherein the quick in comparison to the development deployment to the vehicle below the induction cell for the vehicle under the inflation portion provided in the vehicle front side of the non-inflatable portion adjacent to said non-inflatable portion Head protection airbag device. The cross-sectional area cut horizontally along the vehicle front-rear direction of the induction cell is smaller than the cross-sectional area cut horizontally along the vehicle front-rear direction of the expansion part provided on the vehicle front side of the non-expanded part. The head protection airbag device according to claim 4.

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