JP5942772B2 - Vehicle seat with side airbag device - Google Patents

Description

  The present invention relates to a vehicle seat equipped with a side airbag device.

  In the side airbag device described in Patent Document 1, the airbag includes a main airbag and an auxiliary airbag. The main airbag is fastened and fixed to the outside in the vehicle width direction of the outer side frame portion via an inflator, and a portion on the vehicle front side of the inflator is accordion-folded.

  On the other hand, the auxiliary airbag is fastened and fixed to the outer side frame portion of the outer side frame portion through the inflator together with the main airbag, and passes through the front side of the outer side frame portion to the inner side of the outer side frame portion in the vehicle width direction. It wraps around and is folded in a bellows on the inner side in the vehicle width direction of the outer side frame portion.

  In this side airbag device, an occupant is restrained at an early stage by the auxiliary airbag by inflating and deploying the auxiliary airbag inward in the vehicle width direction in the seat back prior to the main airbag.

JP 2009-023494 A

  However, in the side airbag device having the above configuration, as described above, the auxiliary airbag passes from the outside in the vehicle width direction of the outer side frame portion to the inside of the outer side frame portion through the front side of the outer side frame portion. The bellows are folded. For this reason, there is a possibility that the supply of gas to the auxiliary airbag may be delayed, and there is room for improvement in terms of restraining the occupant at an early stage.

  In view of the above facts, an object of the present invention is to obtain a vehicle seat equipped with a side airbag device capable of improving the early restraining performance of an occupant.

Vehicle seat equipped with a side air bag device according to the first aspect of the present invention, the outer side frames provided on the vehicle width direction outer side of the side portion of Shitoba' phrase, as viewed from the height direction of the seatback A seat body having a side wall portion extending in the front-rear direction of the seat back, a rear wall portion extending obliquely from the rear end of the side wall portion in the vehicle width direction and toward the back side of the seat back, and the vehicle of the side wall portion An inflator attached to the inner side in the width direction, and an occupant and a vehicle body that are provided in a folded state on the inner side in the vehicle width direction of the side wall portion in the side part and are seated on the seat body by receiving gas supply from the inflator A front-deployed airbag that inflates and deploys between the side portions, and a vehicle interior side of the side wall portion in the side portion in the vehicle width direction. An inflatable airbag that is inflated toward the occupant side in the seat back and is supported from the outside in the vehicle width direction by the side wall portion and from the vehicle rear side by the rear wall portion. It is equipped with.

  In the first aspect of the invention, for example, when the vehicle has a side collision, the front deployment airbag receives the supply of gas from the inflator and inflates and deploys between the occupant seated on the seat body and the vehicle body side, The inflatable airbag is supplied with gas from the inflator and is inflated toward the passenger in the seat back. The inflatable airbag is provided on the inner side in the vehicle width direction of the side wall portion of the outer side frame together with the inflator and the front deployment airbag. Thereby, the gas from the inflator can be supplied to the inflating airbag at an early stage, and the inflating airbag can be inflated at an early stage.

  Moreover, the inflated inflated airbag is supported from the outside in the vehicle width direction by the side wall portion of the outer side frame, and is supported from the rear side of the vehicle by the rear wall portion of the outer side frame. Thereby, it can suppress that an inward inflating airbag escapes to the vehicle width direction outer side or the vehicle rear side with the load from a passenger | crew. As a result, the occupant's back side (the spine side with a high resistance value) can be restrained early and effectively from the outside in the vehicle width direction by the inflatable airbag.

That is, according to the present invention, the reaction force from the side of the vehicle body that intrudes inward in the vehicle width direction due to the impact of the side collision is applied to the front deployment airbag before the occupant is restrained by the front deployment airbag. In addition, the occupant's spine can be restrained early and effectively by the inflating airbag receiving the reaction force from the outer side frame of the seat back. As a result, the early restraining performance of the occupant can be improved.
Moreover, in the present invention, since the rear wall portion of the outer side frame extends obliquely as described above, the vehicle front side surface of the rear wall portion can be directed toward the occupant side. Thereby, when the inflated inflated airbag receives a load from the occupant, the inflatable airbag can be favorably supported by the rear wall portion.

  A vehicle seat equipped with a side airbag device according to a second aspect of the present invention is the vehicle seat according to the first aspect, wherein the inflatable airbag is provided in the side portion in a non-inflated deployed state.

  According to the second aspect of the present invention, the inflatable airbag is not folded and is provided in the side portion on the outer side in the vehicle width direction of the seat back in a non-inflated deployed state (planar deployed state). As a result, the inflating airbag can be inflated more quickly than when the inflating airbag is folded, thereby effectively improving the early restraining performance of the occupant by the inflating airbag. Can be made.

  A vehicle seat equipped with a side airbag device according to a third aspect of the present invention is the vehicle seat according to the first or second aspect, wherein the inflated airbag in a non-inflated state has a vehicle width from the side wall portion. It extends inward.

  In the invention described in claim 3, the inflated airbag in a non-inflated state extends from the side wall portion of the outer side frame inward in the vehicle width direction. Accordingly, when the inflating airbag is inflated, a reaction force is applied to the inflating airbag from the rear side of the vehicle at an early stage by the rear wall portion extending inward in the vehicle width direction from the rear end of the side wall portion. be able to.

  A vehicle seat equipped with a side airbag device according to a fourth aspect of the present invention is the vehicle seat according to any one of the first to third aspects, wherein the front deployment airbag is in an inflated and deployed state in the vehicle longitudinal direction. The front bag portion and the rear bag portion are lined up.

  In the invention according to claim 4, the front half part and the rear half part (back) of the outer side in the vehicle width direction of the occupant's chest are restrained from the front and rear by the front bag part and the rear bag part of the front deployment airbag. can do. As a result, stable restraint performance can be obtained.

According to a fifth aspect of the present invention, there is provided a vehicle seat equipped with the side airbag device according to the fifth aspect of the present invention, wherein the front extension portion is provided at an upper portion of the rear bag portion in the inflated and deployed state of the front airbag. Extends to the front side of the vehicle on the side of the shoulder portion of the occupant and is disposed above the front bag portion.

In the invention according to claim 5 , when the front deployment airbag is inflated and deployed, the front extension portion provided at the upper portion of the rear bag portion extends to the vehicle front side on the side of the shoulder portion of the occupant and extends to the front back portion. Arranged above. Since this front extension part is divided with the front bag part, expansion | swelling of a front deployment airbag is suppressed in the said division part (partition part). As a result, the inner side surface in the vehicle width direction of the front bag portion is curved so that the upper side of the front central portion rises as it goes outward in the vehicle width direction. For this reason, when the side airbag and the occupant relatively approach each other due to the impact of the side collision, the curved surface and the occupant's upper arm portion are in sliding contact with each other, and a force that pushes the upper arm portion upward is generated. As a result, the upper arm part is pushed up above the front bag part and is restrained by the front extension part. Thereby, since it can suppress that an upper arm part intervenes between a passenger | crew's chest and a side airbag, the load of a chest can be reduced.

  As described above, in the vehicle seat equipped with the side airbag device according to the present invention, the early restraining performance of the occupant can be improved.

1 is a schematic side view showing a configuration of a main part of a vehicle seat on which a side airbag device according to an embodiment of the present invention is mounted, showing a state in which a front deployment airbag and an inflating airbag are inflated. It is an expanded sectional view which shows the cut surface along the F2-F2 line | wire of FIG. FIG. 3 is a cross-sectional view corresponding to FIG. 2 showing a state before the front deployment airbag and the inflating airbag are inflated. FIG. 3 is a plan development view of a side airbag that is integrally provided with a front deployment airbag and an inflatable airbag.

  A vehicle seat 10 (hereinafter, abbreviated as a vehicle seat 10) equipped with a side airbag device according to an embodiment of the present invention will be described with reference to FIGS. In addition, the arrow FR, arrow UP, and arrow OUT that are appropriately described in each figure respectively indicate the front direction (traveling direction), the upward direction, and the outside in the vehicle width direction of the vehicle. Hereinafter, when the description is made simply using the front-rear direction and the up-down direction, the front-rear direction of the vehicle and the up-down direction of the vehicle are indicated unless otherwise specified.

(Constitution)
As shown in FIG. 1, a vehicle seat 10 according to the present embodiment includes a seat body 12 and an airbag module 16 mounted on a side portion 14A of the seat back 14 of the seat body 12 on the outer side in the vehicle width direction. Is configured as the main part. Hereinafter, each component will be described in detail.

<Configuration of Sheet Body 12>
The seat body 12 includes a seat cushion (not shown) on which an occupant sits, and a seat back 14 which is a backrest is connected to a rear end portion of the seat cushion so as to be tiltable. A headrest 17 that supports the head of the occupant is connected to the upper end of the seat back 14 so that the vertical position can be adjusted.

  In the present embodiment, the front-rear direction, the left-right direction (width direction), and the up-down direction of the seat body 12 and the seat back 14 coincide with the front-rear direction, left-right direction (width direction), and up-down direction of the vehicle. In FIG. 1, a crash test dummy P is seated on the seat body 12 instead of an actual occupant. The dummy P is, for example, an international unified side impact dummy (World SID). Hereinafter, the dummy P is referred to as “occupant P” for the sake of easy understanding.

  As shown in FIGS. 1 to 3, the seat back 14 includes a metal seat back frame 18 that is a skeleton member, and a seat back pad 20 that is supported by the seat back frame 18 (see FIGS. 2 and 3). 1) and a seat skin 22 covering the seat back pad 20.

  The seat back frame 18 includes an outer side frame 24 provided in the side portion 14A on the outer side in the vehicle width direction of the seat back 14 and an inner side frame provided in the side portion on the inner side in the vehicle width direction of the seat back 14 (both (Not shown), an inverted U-shaped upper frame 25 connecting the upper ends of the outer side frame 24 and the inner side frame, and lower ends of the outer side frame 24 and the inner side frame connected in the seat width direction. And lower frame.

  As shown in FIGS. 2 and 3, the outer side frame 24 includes a side wall portion 24 </ b> A and a rear wall portion 24 </ b> B. The side wall portion 24A extends along the front-rear direction of the seat back 14 when viewed from the height direction of the seat back 14, and the rear wall portion 24B extends from the rear end of the side wall portion 24A to the vehicle width direction inner side (in the seat width direction inner side). ) And extends obliquely toward the back side of the seat back 14. The front end portion of the rear wall portion 24B is bent toward the front side of the seat back 14, and extends obliquely toward the inner side in the vehicle width direction and toward the front side of the seat back 14. The inner side frame has the same configuration except that it is formed symmetrically with the outer side frame 24.

  The seat back pad 20 is made of foam such as urethane foam, a pad center portion 20A, a pair of left and right pad side portions 20B (the pad side portion 20B on the inner side in the vehicle width direction is not shown in FIGS. 2 and 3), It is constituted by. The pad center portion 20A has an upper end engaged with the upper frame 25 of the seat back frame 18 from above the seat, and a lower end side connecting the lower ends of the outer side frame 24 and the inner side frame in the seat width direction. Not connected to the connecting rod from the lower side of the seat. The pad center portion 20A is supported from the rear side of the seat by a seat back spring (not shown).

  The left and right pad side portions 20B have a substantially C-shaped cross section, and are mounted so as to be wound around the outer side frame 24 and the inner side frame. These pad side portions 20B bulge toward the front side of the seat with respect to the pad center portion 20A, and have a shape that ensures side support for the occupant P.

  The seat skin 22 includes a front skin 26 that covers the pad central portion 20A from the front side of the seat, a front side skin 28 that covers the pad side portion 20B from the front side of the seat, and the pad side portion 20B on the outer side in the seat width direction and the rear of the seat. A side skin 30 covered from the side and a rear skin 32 covering the pad center portion 20A from the rear side of the seat are provided. A space in which the seat back spring is disposed is formed between the rear skin 32 and the pad center portion 20A.

  The front side skin 28 is sewn to the front skin 26 at the sewing portion 34, and is sewn to the side skin 30 at the sewing portion 36. Further, the side skin 30 is sewn to the rear skin 32 at the sewing portion 38. The sewing portion 36 between the front side skin 28 and the side skin 30 is located at the front end portion of the pad side portion 20B. The sewing portion 36 is configured to be cleaved together with the pad side portion 20B when a front deployment airbag 62 of the side airbag 46 described later is inflated and deployed.

<Configuration of Airbag Module 16>
The air bag module 16 is supplied with an inflator 40 (gas generating device) that ejects gas when activated, a diffuser 42 that rectifies the gas ejected from the inflator 40, and a gas rectified by the diffuser 42. Thus, the side airbag 46 that is inflated and deployed is configured as a main part.

  The inflator 40 is a so-called cylinder type inflator here, and is formed in a cylindrical shape. The inflator 40 is disposed on the inner side in the vehicle width direction (the inner side in the seat width direction) of the side wall portion 24 </ b> A of the outer side frame 24 with the axial direction along the height direction of the seat back 14. From the outer periphery of the inflator 40, a pair of upper and lower stud bolts 48 (see FIGS. 2 and 3) protrude outward in the vehicle width direction. These stud bolts 48 penetrate the side wall portion 24A, and a nut 50 is screwed to the tip side. Thereby, the inflator 40 is attached to the outer side frame 24 (fastened and fixed).

  On the upper end side of the inflator 40, a gas ejection portion 40A is provided. A plurality of gas jets arranged in the circumferential direction of the inflator 40 are formed in the gas jet part 40A, and when the inflator 40 is operated, gas is jetted radially from the plurality of gas jets.

  As shown in FIG. 1, a side collision ECU 52 mounted on the vehicle is electrically connected to the inflator 40. A side collision sensor 54 for detecting a side collision is electrically connected to the side collision ECU 52. The side collision ECU 52 is configured to operate the inflator 40 when a side collision (inevitable) is detected based on a signal from the side collision sensor 54. When a pre-crash sensor for predicting (predicting) a side collision is electrically connected to the side collision ECU 52, the inflator is used when the side collision ECU 52 predicts a side collision based on a signal from the pre-crash sensor. 40 may be configured to be activated.

  The diffuser 42 is formed in a cylindrical shape, and is disposed on the inner side in the vehicle width direction (the inner side in the seat width direction) of the side wall portion 24 </ b> A in a state where the axial direction is along the height direction of the seat back 14. The upper side of the inflator 40 is inserted inside the diffuser 42, and the gas ejection part 40 </ b> A of the inflator 40 is covered with the diffuser 42. Of the upper and lower stud bolts 48 of the inflator 40, the upper stud bolt 48 passes through the diffuser 42, and the diffuser 42 is fastened and fixed to the intermediate portion in the vertical direction of the side wall 24 </ b> A via the inflator 40.

  The diffuser 42 has a function of guiding the gas ejected from the gas ejection portion 40A of the inflator 40 to the upper side and the lower side through the upper and lower openings (function of rectifying the gas). Further, the diffuser 42 is formed with a side opening 56 (see FIGS. 2 and 3) that opens inward in the vehicle width direction, and gas is ejected from the side opening 56 inward in the vehicle width direction. It is the composition which becomes.

  As shown in FIGS. 3 and 4, the side airbag 46 has, for example, two base fabrics 58 and 60 formed by cutting out a nylon- or polyester-based cloth material so that the outer peripheral edge is sewn. It is formed into a bag shape by sewing at T1 (see FIGS. 2 and 4; not shown in FIGS. 1 and 3). In addition, the manufacturing method of a side airbag is not restricted above, It can change suitably. For example, the side airbag 46 may be manufactured by folding one base fabric in half and sewing the outer peripheral edge. For example, the side airbag 46 may be manufactured by a bag weaving method using an automatic loom (so-called OPW method).

  The side airbag 46 is integrally provided with a front deployment airbag 62 (main airbag) and an inflatable airbag 64 (auxiliary airbag) formed in a smaller capacity than the front deployment airbag 62. . The inside of the front deployment airbag 62 and the inside of the inflating airbag 64 are communicated with each other. As shown in FIG. 3, the side airbag 46 is normally provided on the inner side in the vehicle width direction of the side wall portion 24 </ b> A together with the inflator 40 in the side portion 14 </ b> A.

  As shown in FIG. 4, the inflator 40 and the diffuser 42 described above are accommodated in the vicinity of the connection portion with the inflatable airbag 64 in the front deployment airbag 62. The upper and lower stud bolts 48 of the inflator 40 penetrate the base cloth 60, and the side airbag 46 is fastened and fixed to the intermediate portion in the vertical direction of the side wall portion 24 </ b> A via the inflator 40.

  As shown in FIG. 3, the front deployment airbag 62 is normally folded into a bellows on the front side of the seat relative to the inflator 40 and stored in the side portion 14 </ b> A, and the bellows-folded portion is stored in the inflator 40. And the sewing portion 36 of the seat cover 22.

  When the inflator 40 is actuated, the gas ejected from the gas ejection part 40A of the inflator 40 and ejected from the upper and lower openings of the diffuser 42 is supplied into the front deployment airbag 62, as shown in FIGS. The front deployment airbag 62 is inflated and deployed between the occupant P and the door trim 70 of the side door 68 (vehicle body side portion).

  The front deployment airbag 62 is in an inflated and deployed state so that one base cloth 58 faces the inner side in the vehicle width direction (occupant P side) and the other base cloth 60 faces the outer side in the vehicle width direction (side door 68 side). It is arranged. Further, the front deployment airbag 62 is formed to have a substantially oval shape that is elongated along the seat back height direction when the inflated and deployed state is viewed from the side as shown in FIG. The shoulder S, the chest C, and the abdomen B of the occupant P are formed in a size that can be restrained. In FIG. 1, reference numeral 72 denotes a bolt provided on the shoulder S of the occupant P (dummy P).

  The interior of the front deployment airbag 62 is partitioned by a tether 74 (partition cloth: not shown in FIG. 3). The tether 74 is formed in a long band shape by the same cloth material as the base fabrics 58 and 60, and one long side edge portion is a sewing portion T2 (see FIG. 2; shown in FIGS. 1, 3, and 4). The other long side edge is sewn to the base cloth 60 at a sewing portion T3 (see FIG. 2, not shown in FIGS. 1, 3 and 4).

  The tether 74 includes a vertical partition portion 76 that extends in the seat back height direction from the vertical middle portion to the lower portion of the front deployable airbag 62 in the inflated and deployed state of the front deployable airbag 62, and a seat from the upper end of the vertical partition portion 76. It is comprised by the upper partition part 78 (inclination partition part) extended in the diagonally forward direction of the back | bag 14, The front deployment airbag 62 is divided into the front bag part 62A and the rear bag part 62B.

  The interior of the front bag portion 62A is a front chamber 80, and the interior of the rear bag portion 62B is a rear chamber 82. The front chamber 80 and the rear chamber 82 communicate with each other via a communication port 84 (see FIGS. 1 and 4) formed between the lower end of the vertical partition 76 and the lower end of the front deployment airbag 62. . The inflator 40 is disposed on the rear end side of the rear chamber 82, and the gas ejected from the inflator 40 to the rear chamber 82 is supplied to the front chamber 80 through the communication port 84. Thereby, the internal pressure of the rear chamber 82 is configured to be higher than the internal pressure of the front chamber 80.

  This vertical partitioning portion 76 is provided so as to face the front-rear direction intermediate portion on the side surface of the outer side in the vehicle width direction of the chest C and the abdomen B of the occupant P when the front deployment airbag 62 is inflated and deployed. The front half of the lateral side of the chest C and the abdomen B on the outer side in the vehicle width direction is restrained by the front bag part 62A, and the rear half of the lateral part of the chest C and the abdomen B on the lateral side of the vehicle width is restrained by the rear bag part 62B. It is the composition which becomes. In the vicinity of the vertical partition 76, as shown in FIG. 2, the inner side surface in the vehicle width direction of the front deployment airbag 62 is recessed outward in the vehicle width direction to form a recess 86. The recess 86 extends in the seat back height direction along the vertical partition 76. The concave portion 86 is opposed to the front-rear direction intermediate portion of the chest C (that is, the portion that protrudes most outward in the vehicle width direction).

  On the other hand, the upper partition 78 is in an inflated and deployed state of the front deployment airbag 62, with respect to the front-rear direction of the seat back 14 (that is, the direction orthogonal to the height direction of the seat back 14 in the side view of the seat). Inclined to rise as you head forward. By setting the upper partition 78, a front extension 62B1 (see FIGS. 1 and 4) partitioned from the front bag 62A is formed on the upper portion of the rear bag 62B. The front extension 62B1 extends to the front side of the vehicle on the side of the shoulder S of the occupant P and is disposed above the front bag 62A, and restrains the shoulder S of the occupant P.

  Further, in the vicinity of the upper partition portion 78 (partition portion), an inner side surface in the vehicle width direction of the front deployment airbag 62 is recessed outward in the vehicle width direction to form a recess (not shown). The recess extends obliquely upward and forward of the seat back 14 along the upper partition 78. Further, the inner side surface in the vehicle width direction of the front bag portion 62A is curved so that the upper side of the front bag portion 62A rises toward the outer side in the vehicle width direction than the central portion in the vertical direction. In the present embodiment, both the vertical partition portion 76 and the upper partition portion 78 are configured by the tether 74. However, the configuration is not limited thereto, and the vertical partition portion 76 is configured by the tether 74 and the upper partition portion is a seam ( You may comprise by a sewing part).

  On the other hand, the inflatable airbag 64 is integrally connected to the rear end portion of the rear bag portion 62B of the front deployable airbag 62, and is normally unfolded without being folded (planar deployed state). It is provided in the side portion 14A. The inflated airbag 64 in the non-inflated deployed state is disposed on the vehicle front side of the rear wall portion 24B of the outer side frame 24 so as to extend inward in the vehicle width direction from the side wall portion 24A.

  When the inflator 40 is actuated, the gas ejected from the gas ejection part 40A of the inflator 40 and ejected inward in the vehicle width direction from the side opening 56 of the diffuser 42 is supplied into the inner inflating airbag 64. . As a result, the inflating airbag 64 receives the inflation reaction force from the outer side in the vehicle width direction and the rear side of the vehicle by the side wall portion 24A and the rear wall portion 24B of the outer side frame 24 (while being supported). It expands to the passenger P side.

  The inflatable airbag 64 is formed to have a sufficiently smaller vertical dimension in the inflated state than the front deployment airbag 62, and the back of the side of the occupant P's chest C and abdomen B outside in the vehicle width direction. An inflated inflated airbag 64 is interposed between the side and the outer side frame 24. As a result, the occupant P's spine V is restrained from the outside in the vehicle width direction by the inflated airbag 64. When the restraint is performed, the inflating airbag 64 is supported from the outside in the vehicle width direction by the side wall portion 24A of the outer side frame 24, and is supported from the vehicle rear side by the rear wall portion 24B. ing.

  Further, the inflatable airbag 64 is formed to have a capacity sufficiently smaller than that of the front deployment airbag 62, and is configured to complete the inflation earlier than the front deployment airbag 62.

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

  In the side airbag device 10 configured as described above, when the side collision ECU 52 detects a side collision by a signal from the side collision sensor 54, the inflator 40 is operated by the side collision ECU 52. Then, the front deployment airbag 62 of the side airbag 46 is supplied with gas from the inflator 40 and is inflated and deployed between the occupant P and the door trim 70 of the side door 68, and the inner inflation airbag 64 is inflated. In response to the supply of gas from the vehicle, the seat back 14 expands toward the passenger P side. The inflatable airbag 64 is provided on the inner side in the vehicle width direction of the side wall portion 24A of the outer side frame 24 together with the inflator 40 and the front deployment airbag 62. Thereby, the gas from the inflator 40 can be supplied to the inflating airbag 64 at an early stage, and the inflating airbag 64 can be inflated at an early stage.

  Moreover, the inflated airbag 64 is supported from the outside in the vehicle width direction by the side wall portion 24A of the outer side frame 24, and is supported from the rear side of the seat back by the rear wall portion 24B of the outer side frame 24. Thereby, it is possible to suppress the inflating airbag 64 from escaping to the outside in the vehicle width direction or the vehicle rear side due to the load from the occupant P. As a result, the back side of the occupant P (the spine V side having a high resistance value) can be restrained early and effectively from the outside in the vehicle width direction by the inflating airbag 64. Thereby, the early restraining performance of the passenger | crew P can be improved.

  That is, according to the present embodiment, the reaction force from the door trim 70 of the side door 68 that intrudes inward in the vehicle width direction due to the impact of the side collision is applied to the front deployment airbag 62, and the occupant P Before being restrained by the bag 62, the occupant P's spine V can be restrained early and effectively by the inflatable airbag 64 that receives the reaction force from the outer side frame 24. As a result, the early restraining performance of the occupant P can be improved, and the load on the ribs of the occupant P can be reduced.

  Moreover, in the present embodiment, the entire airbag module 16 is disposed on the inner side in the vehicle width direction of the outer side frame 24. As a result, like the conventional side airbag device described in the background art section, the main airbag and the auxiliary airbag are arranged separately in the vehicle width direction inside and the vehicle width direction outside of the outer side frame portion. Compared with the configuration, the workability of assembling the airbag module 16 to the seat back 14 can be improved.

  In the present embodiment, the inflatable airbag 64 is normally not folded and provided in the side portion 14A of the seat back 14 in a non-inflated deployed state (planar deployed state). Thereby, compared with the case where the inner inflating airbag 64 is folded, the inner inflating airbag 64 can be inflated faster, so that the early restraining performance of the occupant P by the inner inflating airbag 64 is improved. It can be improved effectively.

  Furthermore, in the present embodiment, the inflated airbag 64 in a non-inflated deployed state is disposed so as to extend inward in the vehicle width direction from the side wall portion 24A of the outer side frame 24. As a result, when the inflating airbag 64 is inflated, the rear wall 24B extending inward in the vehicle width direction from the rear end of the side wall 24A is quickly brought into the rear of the inner inflating airbag 64 from the vehicle rear side. A reaction force can be applied.

  In the present embodiment, the rear wall portion 24B of the outer side frame 24 extends obliquely from the rear end of the side wall portion 24A toward the inner side in the vehicle width direction and toward the back side of the seat back 14. For this reason, the vehicle front side surface of the rear wall portion 24B can be directed to the occupant P side. Thereby, when the inflated inflating airbag 64 receives a load from the occupant P, the inflating airbag 64 can be favorably supported by the rear wall portion 24B. Further, when the inflating airbag 64 is inflated, a reaction force can be applied to the inflating airbag 64 at an early stage by the rear wall portion 24B. Further, since the outer side frame 24 includes the rear wall portion 24B, the strength of the outer side frame 24 can be secured, and the inflatable airbag 64 can inadvertently interfere with seat components during normal use. Damage can be suppressed.

  Furthermore, in this embodiment, the front deployment airbag 62 is partitioned into a front bag portion 62A and a rear bag portion 62B that are aligned in the vehicle front-rear direction in the inflated and deployed state. For this reason, the front bag part 62A and the rear bag part 62B can restrain the front half part and the rear half part (back) of the chest C and the abdomen B of the occupant P from the front and rear. As a result, stable restraint performance can be obtained. Further, the front bag portion 62A and the rear bag portion 62B can restrain the side of the chest C and the abdomen B of the occupant P so as to cover from the front and back along the curve. Thereby, the positional relationship in the vehicle front-rear direction between the chest C and the abdomen B and the front deployment airbag 62 can be stabilized.

  Further, in a state where the front deployment airbag 62 is inflated and deployed, an intermediate portion in the front-rear direction on the side surface of the chest C (in the recess 86 formed in the vicinity of the vertical partition portion 76 on the inner side surface in the vehicle width direction of the front deployment airbag 62 ( In other words, the portion that protrudes most outward in the vehicle width direction (the center in the front-rear direction or near the center in the front-rear direction) fits. Thereby, the load to the chest C (especially rib) can be reduced.

  In addition, in the front deployment airbag 62, the front bag portion 62A that restrains the chest C and the front half of the abdomen B of the occupant P and the rear bag portion 62B that restrains the chest C and the rear half of the abdomen B are provided by the tether 74. It is partitioned. The inflator 40 is provided in the rear bag portion 62B, and the gas generated from the inflator 40 is supplied into the front bag portion 62A through the communication port 84. Thereby, since the rear bag part 62B can be inflated and deployed at a higher pressure and earlier than the front bag part 62A, the rear part of the chest part C and the abdominal part B, which are relatively more resistant than the first half part of the chest part C and the abdominal part B. Can be restrained at an early stage by the rear bag portion 62B.

  A front extension 62B1 for restraining the shoulder S of the occupant P is provided on the upper portion of the rear bag 62B. As the front extension 62B1 is inflated and deployed at an early stage, the shoulder S of the occupant P can be restrained at an early stage. Moreover, the front extension 62B1 is partitioned from the front bag 62A by an upper partition 78 that extends obliquely upward and forward from the upper end of the vertical partition 76, and is inflated and deployed to the upper side of the front bag 62A. To do. That is, by setting the upper partitioning portion 78 extending upward in the front-rear direction of the seat back 14, the upper portion (front extending portion 62B1) of the rear bag portion 62B extends upward from the front bag portion 62A. The shoulder S of P is restrained. Since the upper partitioning portion 78 is inclined so as to rise toward the front side of the seatback 14 with respect to the front-rear direction of the seatback 14, the rear bag is suppressed while suppressing an increase in the capacity of the rear bag portion 62B. The upper part (front extending part 62B1) of the part 62B can be satisfactorily opposed to the shoulder S of the occupant P. As a result, since the chest C and the rear half of the abdomen B and the shoulder S can be restrained early, the initial restraining performance of the occupant P can be improved.

  Furthermore, the inner side surface in the vehicle width direction of the inflated and deployed front bag portion 62A is curved so that the upper side of the front side in the vertical direction rises toward the outer side in the vehicle width direction. For this reason, when the front deployment airbag 62 and the occupant P are relatively close to each other by the impact of the side collision, the curved surface and the upper arm portion A of the occupant P are slidably contacted to push the upper arm portion A upward. Occurs. As a result, the upper arm part A is pushed up above the front bag part 62A and is restrained by the front extension part 62B1. Thereby, since it can suppress that the upper arm part A intervenes between the passenger | crew's P chest part C and the front deployment airbag 62, the load of the chest part C can be reduced.

  In addition, the upper arm portion A pushed up by sliding contact with the front bag portion 62A is fitted into a recess formed in the vicinity of the upper partition portion 78 on the inner side surface in the vehicle width direction of the front deployment airbag 62. Thereby, the upper arm part A can be favorably restrained at the pushed-up position.

  Further, in the present embodiment, since the vertical partition portion 76 and the upper partition portion 78 are configured by the tether 74, the inflated thickness (inflated and unfolded) of the front bag portion 62A and the rear bag portion 62B is equal to the width of the tether 74. In the vehicle width direction in the state) can be increased. Thereby, the shock absorption stroke of the front bag part 62A and the rear bag part 62B can be ensured satisfactorily.

(Supplementary explanation of the embodiment)
In the embodiment described above, the rear bag portion 62B of the front deployment airbag 62 includes the front extension portion 62B1, but the present invention is not limited thereto, and the front extension portion 62B1 is omitted, and a portion of the front extension portion 62B1 is provided. Alternatively, the front bag portion 62A may be configured.

  In the above embodiment, the front deployment airbag 62 is divided into the front bag portion 62A and the rear bag portion 62B, that is, the front deployment airbag 62 is configured as a twin chamber. However, the configuration may be such that the front deployment airbag is a single chamber.

  In the above-described embodiment, the inflatable airbag 64 in a non-inflated deployed state is normally arranged so as to extend from the side wall portion 24A of the outer side frame 24 inward in the vehicle width direction. The present invention is not limited to this, and the manner of disposing the inflated airbag in a non-inflated deployed state can be changed as appropriate.

  In the above embodiment, the inflatable airbag 64 is provided in the side portion 14A on the outer side in the vehicle width direction of the seat back 14 in a non-inflated deployed state, but the present invention is not limited to this. A configuration may also be adopted in which the inflatable airbag is provided in a side portion on the outer side in the vehicle width direction of the seat back in a folded state.

  Moreover, in the said embodiment, although it was set as the structure by which the front deployment airbag 62 and the inward inflating airbag 64 were integrally formed, this invention is not restricted to this, A front deployment airbag, an inward inflating airbag, May be formed separately, and may be integrally coupled by sewing or the like.

  In the above embodiment, the inflatable airbag 64 is directly supported by the side wall portion 24A of the outer side frame 24 at the time of inflating and deploying. However, the present invention is not limited to this, and the inflatable airbag is not limited to this. You may make it the structure supported by a side wall part indirectly via a front deployment airbag.

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

DESCRIPTION OF SYMBOLS 10 Vehicle seat which mounts side airbag apparatus 12 Seat main body 14 Seat back 14A Side part of vehicle width direction outer side 24 Outer side frame 24A Side wall part 24B Rear wall part 40 Inflator 62 Front deployment airbag 62A Front bag part 62B Rear bag 62B1 Front extension 64 Inwardly inflating airbag

Claims (5)

Outer side frames provided in the side portion of the vehicle width direction outer side at Shitoba' click is rear from the vehicle width direction of the side wall portion extending in the longitudinal direction as viewed from the height direction of the seat back the seat back and the side wall portion A seat body having an inner wall and a rear wall extending obliquely toward the back side of the seat back ;
An inflator attached to the inside of the side wall in the vehicle width direction;
The front part is provided in a state of being folded inward in the vehicle width direction of the side wall part in the side part, and receives the gas supply from the inflator and expands and deploys between the occupant seated on the seat body and the side part of the vehicle body Deploying airbag,
Provided on the inner side in the vehicle width direction of the side wall portion in the side portion, receives supply of gas from the inflator, expands toward the occupant side in the seat back, and is supported from the outer side in the vehicle width direction by the side wall portion. And an inflatable airbag supported from the rear side of the vehicle by the rear wall,
A vehicle seat equipped with a side airbag device equipped with   The vehicle seat equipped with the side airbag device according to claim 1, wherein the inflatable airbag is provided in the side portion in a non-inflated deployed state.   The vehicle seat equipped with the side airbag device according to claim 2, wherein the inflated airbag in a non-inflated deployment state extends inward in the vehicle width direction from the side wall portion.   The side airbag device according to any one of claims 1 to 3, wherein the front deployment airbag is partitioned into a front bag portion and a rear bag portion arranged in the vehicle longitudinal direction in an inflated and deployed state. Vehicle seat. In a state where the front deployment airbag is inflated and deployed, a front extending portion provided at an upper portion of the rear bag portion extends to the vehicle front side on a side of a shoulder portion of an occupant and is disposed above the front bag portion. Item 5. A vehicle seat equipped with the side airbag device according to Item 4 .

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