JP2021024487A - Occupant protection device - Google Patents

Abstract

To provide an occupant protection device capable of stably protecting an occupant.SOLUTION: There is provided an air bag 15 folded and stored in a roof R, and capable of deploying and inflating projectingly downward by making inflation gas flow into the inside. The air bag comprises: vehicle width direction inflation parts 17 formed nearly along a vehicle width direction so as to continuously cover the front side of rear seats RS arranged side by side at a vehicle width direction side; and projecting inflation parts 40 each projecting from the rear surface sides of the vehicle width direction inflation parts to each of the rear seat sides. The vehicle width direction inflation parts are arranged nearly along a vertical direction, and cover the front side of a rear side occupant RP seated on the rear seat. The projecting inflation parts are arranged opposite to the rear side occupant, and the rear face at inflation completion is used as a lower receiving surface 41 capable of receiving a lower side region of an upper half body RU of the rear side occupant, and the top face at inflation completion, arranged so as to continue from the lower receiving surface, is used as an upper receiving surface 42 capable of receiving an upper side region of the upper half body.SELECTED DRAWING: Figure 20

Description

The present invention has an airbag that can be folded and stored in the roof of a vehicle, allows expansion gas to flow into the vehicle, and expands and expands so as to project downward, and air when expansion is completed. It relates to an occupant protection device that can protect an occupant seated in a seat by a bag.

Conventionally, the occupant protection device is mounted on a vehicle having front seats and rear seats arranged side by side in the vehicle width direction, and when the expansion is completed, the front seats and the rear seats are partitioned from above. Some of them are provided with an airbag that expands in a substantially cruciform plate shape (see, for example, Patent Document 1).

U.S. Pat. No. 9725064

However, in the conventional occupant protection device, the airbag is arranged so as to partition between the front seat and the rear seat, and covers the front of the occupant seated in the front seat and the rear seat. Since it has a plate shape, there is room for improvement in that it stably restrains the occupant moving toward the inflated airbag in the event of a vehicle collision.

The present invention solves the above-mentioned problems, and an object of the present invention is to provide an occupant protection device capable of stably protecting an occupant.

The occupant protection device according to the present invention has an airbag that can be folded and stored in the roof of a vehicle, allows expansion gas to flow into the vehicle, and expands and expands so as to project downward. It is an occupant protection device that can protect the occupants seated in the seat by the airbag when the expansion is completed.
When the airbag is fully inflated,
It expands by inflowing expansion gas into the inside, and is continuously formed along the vehicle width direction so as to continuously cover the front of each rear seat in front of the rear seats arranged side by side in the vehicle width direction. A roughly plate-shaped expansion part in the vehicle width direction,
A protruding expansion portion arranged so as to project from the rear surface side of the expansion portion in the vehicle width direction toward each rear seat side,
It is configured to have
The vehicle width direction expansion portion is arranged so as to substantially follow the vertical direction, and is configured to cover the front of the rear occupant seated in each rear seat.
The protruding expansion portion is arranged in the lower region of the expansion portion in the vehicle width direction so as to face the rear occupant, and the outer shape is substantially rectangular parallelepiped, and the rear surface when expansion is completed is the upper body of the rear occupant. The lower area is the receiving lower receiving surface, and the upper surface when expansion is completed, which is arranged so as to be continuous from the lower receiving surface, is the upper receiving surface that can receive the upper area of the upper body of the rear occupant. It is characterized in that it is configured as a retaining surface.

In the occupant protection device of the present invention, the airbag expands in a plate shape so as to continuously cover the front of the rear seat, and the vehicle width direction expansion portion partially expands from the rear surface side of the vehicle width direction expansion portion. It is configured to include a protruding inflatable portion, and the protruding inflatable portion is arranged so as to face a rear occupant seated in each rear seat. Therefore, in the event of a vehicle collision, when the rear occupant moves forward toward the airbag, the rear occupant can be stably restrained by the protruding expansion portion arranged relative to each other. it can. Specifically, the protruding expansion portion receives the lower region of the upper body of the rear occupant moving forward by the lower receiving surface composed of the rear surface when the expansion is completed, and then the upper portion connected to the lower receiving surface. The receiving surface receives the upper region of the upper body of the rear occupant, and the protruding expansion portion can accurately restrain the occupant moving forward. Further, in the occupant protection device of the present invention, in the airbag when expansion is completed, the vehicle width direction expansion portion is continuously formed along the vehicle width direction so as to continuously cover the front of each rear seat. Since it has a substantially plate shape, for example, even if the rear occupant moves diagonally forward on the center side in the vehicle width direction so as to deviate from the arrangement area of the protruding expansion portion, the vehicle Further forward movement can be regulated by the widthwise expansion.

Therefore, the occupant protection device of the present invention can stably protect the occupant.

Further, in the occupant protection device of the present invention, the expansion gas is introduced into the airbag to expand the airbag so as to partition the rear seats which are separately arranged from each other, and the expansion portion in the vehicle width direction is expanded. The front-rear direction expansion portion, which has a substantially plate-like shape extending from the vicinity of the center to the rear, is arranged.
It is preferable that the front-rear expansion portion is arranged so as to substantially follow the vertical direction so as to cover the side of the rear occupant.

If the occupant protection device has the above configuration, the rear seats can be partitioned by a front-rear expansion portion that expands in a plate shape by inflowing expansion gas into the airbag when expansion is completed. Even if the rear occupant moves to the side that is the center side in the vehicle width direction, it can be restrained by the front-rear expansion portion that expands between the rear seats.

Further, in the occupant protection device having the above configuration, the front-rear expansion portion is provided with a front expansion portion arranged so as to extend forward from the vehicle width direction panel portion.
The front expansion part is arranged between the front seats arranged side by side so as to be separated from each other on the vehicle width direction side, and is arranged substantially along the vertical direction to the side of the front occupant seated on the front seat. It is preferable to configure the structure so that it can be covered.

If the occupant protection device has the above configuration, even if the front occupant seated in the front seat moves to the side that is the center side in the vehicle width direction, the front-rear direction that expands between the front seats. It can be restrained by the anterior expansion site of the expansion portion.

Furthermore, in the occupant protection device having the above configuration, at the rear expansion portion of the front-rear expansion portion arranged on the rear side of the vehicle width direction expansion portion, the rear portion is located near the vehicle width direction expansion portion. If the rear side protruding inflated portion is formed so as to project toward each rear seat side at a position above the seat surface of the seat, the side that becomes the center side in the vehicle width direction is formed. It is preferable that the rear side occupant moving toward the direction can be accurately restrained by the rear side side protruding expansion portion.

Furthermore, in the occupant protection device having the above configuration, the front portion projects toward each front seat at a position near the expansion portion in the vehicle width direction and at a position above the seat surface of the front seat. If the front side protruding expansion portion is formed so as to be formed, the front side occupant moving toward the center side in the vehicle width direction can be accurately moved by the front side lateral protrusion expansion portion. It can be restrained and is preferable.

Furthermore, in the occupant protection device having the above configuration, if the rear side lateral protrusion expansion portion is formed so as to be continuous from the protrusion expansion portion, the rear side side protrusion expansion portion and the protrusion expansion portion are formed. It will be arranged continuously from the front of the rear occupant to the side of the center side in the vehicle width direction, and even if the rear occupant moves diagonally forward on the center side in the vehicle width direction. It is preferable that the rear side occupant can be accurately restrained by the rear side lateral protruding expansion portion and the protruding expansion portion.

It is a schematic partial enlarged plan view of the vehicle equipped with the occupant protection device which is one Embodiment of this invention. It is a schematic partial enlarged plan view which shows the passenger interior of the vehicle which mounts the occupant protection device of embodiment. It is a schematic partial enlarged sectional view of the vehicle which mounts the occupant protection device of embodiment. It is a schematic partial enlarged sectional view of the occupant protection device of an embodiment. It is a schematic perspective view which shows the state in which the airbag used in the occupant protection device of an embodiment is inflated by itself. It is a top view of the airbag of FIG. It is a side view of the airbag of FIG. It is a schematic cross-sectional view of the airbag of FIG. It is an end view of the IX-IX part of FIG. It is an end view of the XX part of FIG. It is an end view of the XI-XI part of FIG. It is a partially enlarged cross-sectional view which shows the intersection part in the airbag of FIG. It is a top view which shows the base material which comprises the airbag of FIG. FIG. 5 is a plan view showing the rest of the base material constituting the airbag of FIG. FIG. 5 is a plan view showing the rest of the base material constituting the airbag of FIG. FIG. 5 is a plan view showing the rest of the base material constituting the airbag of FIG. FIG. 5 is a schematic plan view showing a state in which the airbag has completed expansion in the occupant protection device of the embodiment. FIG. 5 is a schematic side view showing a state in which the airbag has completed expansion in the occupant protection device of the embodiment. FIG. 5 is a schematic rear view showing a state in which the airbag has completed expansion in the occupant protection device of the embodiment. FIG. 5 is a schematic partially enlarged side view showing a state in which the airbag has completed expansion in the occupant protection device of the embodiment. FIG. 5 is a schematic partially enlarged plan view showing a state in which the airbag has completed expansion in the occupant protection device of the embodiment. FIG. 5 is a schematic plan view showing a state in which a seat is rotated in a vehicle equipped with the occupant protection device of the embodiment. FIG. 5 is a schematic plan view showing another state in which the seat is rotated in the vehicle equipped with the occupant protection device of the embodiment. FIG. 5 is a schematic plan view showing another state in which the seat is rotated in the vehicle equipped with the occupant protection device of the embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the vehicle V equipped with the occupant protection device M of the embodiment, as shown in FIGS. 1 and 2, the driver's seat DS and the passenger seat PS as the front seat FS are separated from each other, and on the vehicle width direction side. The rear seats RS (RS1, RS2) are arranged side by side so as to be separated from each other and arranged side by side in the vehicle width direction.

The occupant protection device M includes an airbag 15 that is folded and stored in the roof R of the vehicle V, and an inflator 10 that can supply expansion gas to the airbag 15. Further, as shown in FIG. 3, the occupant protection device M is covered with a roof head lining 5 constituting the roof R over the entire lower surface side, and is housed in the roof R. The roof head lining 5 has a thin wall shape such that a planned break portion 6 that breaks when the airbag 15 expands and expands and allows the airbag 15 to project downward is cut out from the upper surface side (see FIG. 4). , Continuously arranged over approximately the entire length of the arrangement area of the airbag 15. In the case of the embodiment, as shown in FIG. 1, the airbag 15 is housed in the roof R in a state of a folded perfective body 55 folded in a substantially cross shape when viewed from above, and is scheduled to be broken. The portions 6 are arranged in a substantially cross shape when viewed from above so as to pass through substantially the center of the strip-shaped folding completed body 55 in the width direction and extend over the entire length of the folded completed body 55 (see FIG. 1). ). Further, in the embodiment, on the upper surface side of the roof head lining 5, regulation wall portions 7 projecting upward so as to surround the periphery (both sides in the width direction) of the folded perfective body 55 are continuously arranged in parallel. It is formed (see FIG. 4). The two regulation wall portions 7 and 7 arranged to face each other are the planned breakage portions where the airbag 15 that expands by inflowing the expansion gas into the inside is arranged between the regulation wall portions 7 and 7 arranged in parallel. 6 is formed so as to break and smoothly project downward from the roof head lining 5, and is arranged so as to extend to the vicinity of the cross member 3 which is a member on the body 1 side.

In the case of the embodiment, the inflator 10 includes the front end 15a side, the rear end 15b side, the left end 15c side, the right end 15d side of the airbag 15 (folding completed body 55), and the vehicle width direction expansion portion 17 described later in the airbag 15. It is arranged at five locations, the intersection 36 with the front-rear expansion portion 27 (see FIGS. 1 and 6). In the case of the embodiment, as the inflator 10, a cylinder type having a substantially columnar outer shape is used. The inflator 10 is arranged so as to substantially follow the axial direction in the left-right direction at the left end 15c side, the right end 15d side, and the intersection portion 36 within the region of the vehicle width direction expansion portion 17, and the region of the front-rear direction expansion portion 27. The front end 15a side and the rear end 15b side, which are inside, are arranged so that the axial direction is substantially along the front-rear direction. Specifically, although detailed illustration is omitted, each inflator 10 is provided with a gas discharge port capable of discharging expansion gas on one end side, and the expansion gas discharged from the gas discharge port is inside the airbag 15. It is a configuration that leaks to. In the case of the embodiment, as shown in FIG. 4, each inflator 10 is housed in the airbag 15 so that the bolt 10a as a mounting means protrudes to the outside, and the airbag 10a is used to use the bolt 10a. Together with 15, it is attached to the cross member 3 which is a member on the body 1 side. As shown in FIG. 1, the cross member 3 has a vehicle at a total of five locations, that is, the front edge and the trailing edge of the roof R, and three locations that substantially equally divide the intermediate portion before and after the roof R. It is continuously arranged over the entire width direction. Specifically, in the case of the embodiment, the central cross member 3C arranged at the center is a position slightly forward from the center of the front and rear when the vehicle V is viewed from above, and is a front seat FS and a rear seat. It is placed at a position between the RS and the RS. The inflator 10 is attached to the front cross member 3F arranged on the front edge side, the rear cross member 3R arranged on the rear edge side, and the central cross member 3C. In the case of the embodiment, the inflator 10 has an operation signal from a control device (not shown) when an impact force is applied from the front or side such as when the vehicle V has a frontal collision, a side collision, an oblique collision, or an offset collision. It is electrically connected to the control device by a lead wire (not shown) so as to receive and start the operation.

The airbag 15 has a bag shape made of a flexible seat body, and the expansion gas discharged from the inflator 10 is allowed to flow into the inside, and the airbag 15 is directed downward from the roof R (roof head lining 5). It expands and expands so as to protrude, and in the case of the embodiment, when the expansion is completed, the two front seat FSs (driver's seat DS, passenger seat PS) and the two rear seats RS (RS1, RS2) are partitioned. As described above, the configuration is arranged (see FIGS. 2 and 17). Although detailed illustration of the airbag 15 is omitted, the inflator 10 and a separately provided mounting bracket (not shown) are provided at predetermined locations on the upper end side (parts of the upper wall portions 20 and 30 described later) when expansion is completed. It is a configuration that can be attached to the cross member 3 on the body 1 side by using the above.

As shown in FIGS. 5 to 11 and 17, the airbag 15 has a substantially plate-like vehicle width formed substantially along the vehicle width direction so as to partition the front seat FS and the rear seat RS when the expansion is completed. Approximately plate-shaped front and rear formed substantially along the front-rear direction so as to partition between the directional expansion portion 17, the front seat FS (driver's seat DS, passenger seat PS), and the rear seat RS (RS1, RS2), respectively. The directional expansion portion 27, the two protrusion expansion portions 40 (40L, 40R) arranged so as to project rearward from the rear surface side of the vehicle width direction expansion portion 17, and each front seat from the front-rear direction expansion portion 27. FS (driver's seat DS, passenger seat PS), front side protruding expansion part 45 (45L, 45R) arranged so as to project toward the rear seats RS1 and RS2 side, rear side side protrusion expansion part 48 (48L) , 48R), and so on.

The expansion portion 17 in the vehicle width direction expands by inflowing expansion gas into the inside, and has a substantially plate-like outer shape when expansion is completed. When expansion of the airbag 15 is completed, each rear seat is in front of the rear seat RS. It is a portion that is continuously formed along the vehicle width direction so as to continuously cover the front of RS1 and RS2 (see FIGS. 17 and 19). As shown in FIGS. 8 and 9, the vehicle width direction expanding portion 17 expands with the front wall portion 18 and the rear wall portion 19 facing each other in the front-rear direction side, and the upper wall portion 20 arranged on the upper end side when the expansion is completed. It is provided with a lower wall portion 21 arranged on the lower end side at the time of completion, and is arranged so as to substantially follow the vertical direction at the time of completion of expansion. Further, the vehicle width direction expansion portion 17 has a width dimension on the vehicle width direction side (left-right direction side) at the completion of expansion slightly smaller than the width dimension on the vehicle width direction side of the roof R, and the left end 17a and the right end. The 17b is set to a position that substantially coincides with the outer edge side in the vehicle width direction of the rear seats RS1 and RS2 (see FIGS. 17 and 19), and the length on the vertical side when the expansion is completed. The dimensions are set so that the lower end 17c is arranged at a position near the seat surface of the seat portion RSS in the rear seat RS (see FIGS. 18 and 19). Further, the vehicle width direction expansion portion 17 has a thickness at the completion of expansion so that it can smoothly enter between the knee RK of the rear occupant RP seated on the rear seat RS and the front seat FS and expand. , (See FIGS. 18 and 20). The vehicle width direction expansion portion 17 can also protect the knee RK of the rear occupant RP by a portion on the lower end 17c side located near the seat surface of the seat portion RSS. As shown in FIGS. 18 and 19, the vehicle width direction expansion portion 17 covers the front of the rear occupant RP seated on the rear seat RS when the expansion is completed.

The front-rear direction expansion portion 27 expands by inflowing expansion gas into the inside, and the outer shape at the time of completion of expansion is substantially plate-like. In the case of the embodiment, each front seat FS (when expansion of the airbag 15 is completed) Driver's seat DS, passenger's seat PS), and rear seats RS1 and RS2 are continuously formed along the front-rear direction so as to continuously cover the sides (see FIGS. 17 and 18). As shown in FIGS. 8, 10 and 11, the front-rear direction expansion portions 27 are arranged on the left wall portion 28 and the right wall portion 29 facing each other on the vehicle width direction (left-right direction) side and on the upper end side when the expansion is completed. It includes a wall portion 30 and a lower wall portion 31 arranged on the lower end 27c side when expansion is completed, and is arranged so as to substantially follow the vertical direction when expansion is completed. The width on the front-rear direction side when expansion is completed. The dimension is set to be slightly smaller than the width dimension on the front-rear side of the roof R (see FIG. 18). Further, the front-rear direction expansion portion 27 is configured so that the length dimension on the vertical direction side at the time of completion of expansion is substantially the same as that of the vehicle width direction expansion portion 17, in other words, at the time of completion of expansion of the airbag 15. The lower end 27c of the front-rear expansion portion 27 is arranged at a position near the seat surface of the seat portion FSS and RSS in the front seat FS and the rear seat RS (see FIGS. 18 and 19). Further, in the case of the embodiment, the thickness of the front-rear expansion portion 27 at the completion of expansion is substantially the same as the thickness of the vehicle width direction expansion portion 17 (see FIGS. 5 and 6), and the front seat FS (driver's seat DS) , The size is set so that it can smoothly enter and expand between the passenger seat PS) and the rear seats RS1 and RS2. In the case of the embodiment, as shown in FIGS. 5 and 6, the front-rear direction expansion portion 27 and the vehicle width direction expansion portion 17 have an outer shape seen from the vertical direction side as a substantially cross shape, and the entire upper and lower parts at the intersection 36. It is integrally configured so that it can be communicated over.

The front-rear expansion portion 27 includes a front expansion portion 33 arranged on the front side of the vehicle width direction expansion portion 17, and a rear expansion portion 34 arranged on the rear side of the vehicle width direction expansion portion 17. There is. The front expansion portion 33 covers the side of the front occupant FP seated in the front seat FS (driver's seat DS, passenger seat PS) when the expansion is completed, and the rear expansion portion 34 covers the rear seat when the expansion is completed. It will cover the side of the rear occupant RP seated on RS1 and RS2.

The protruding expansion portions 40 (40L, 40R) formed so as to project from the rear surface side of the vehicle width direction expansion portion 17 toward the rear seats RS1 and RS2 side are, specifically, in the vehicle width direction expansion portion 17 in the front-rear direction. The left expansion portion 23 and the right expansion portion 24 arranged on the left and right sides of the expansion portion 27 are formed, respectively. These protruding expansion portions 40 (40L, 40R) are arranged relative to the rear occupant RP in the lower region of the vehicle width direction expansion portion 17 when the expansion of the airbag 15 is completed (FIG. 20). (See), by connecting the front end side to the peripheral edge of the opening 19a formed in the rear wall portion 19 of the vehicle width direction expansion portion 17, it is communicated with the vehicle width direction expansion portion 17 and the outer shape is made into a substantially rectangular parallelepiped shape. It is configured (see FIG. 9). The protruding expansion portions 40L and 40R are the upper wall portion 40a and the lower wall portion 40b facing each other in the vertical direction when the expansion is completed, the inner wall portion 40c and the outer wall portion 40d facing each other in the vehicle width direction, and the rear side when the expansion is completed. It is provided with a rear wall portion 40e arranged in. Each of the protruding expansion portions 40 (40L, 40R) receives the rear surface (rear wall portion 40e) at the time of completion of expansion and the lower region (abdominal RA) in the upper body RU of the rear occupant RP. The stop surface 41 (41L, 41R) is used, and the upper surface (upper wall portion 40a) at the time of completion of expansion, which is arranged so as to be continuous from the lower receiving surface 41, is the upper region (in the embodiment) of the upper body RU of the rear occupant RP. In the case, it is configured as an upper receiving surface 42 (42L, 42R) capable of receiving (from the chest RB to the head RH). Specifically, in the airbag 15 at the completion of expansion, the rear wall portions 40e constituting the lower receiving surfaces 41L and 41R substantially follow the vertical direction in the area of about the lower half of the protruding expansion portions 40L and 40R. The upper wall portion 40a that is formed and constitutes the upper receiving surfaces 42L and 42R has the front side portion 40aa of about the front half substantially along the front-rear direction, and the rear side portion 40ab of about the rear half connected to the rear surface. It is configured to incline backward and downward with respect to the direction (see FIG. 9). That is, the upper receiving surfaces 42L and 42R are formed so as to be inclined so as to descend toward the lower receiving surfaces 41L and 41R.

Further, in the embodiment, the two protruding expansion portions 40 (40L, 40R) are configured so that the outer shapes are substantially the same. The protruding expansion portions 40 (40L, 40R) have the width dimension in the front-rear direction when the expansion is completed, and are seated on the vehicle width direction expansion portion 17 and the rear seats RS1 and RS2 when the expansion of the airbag 15 is completed. The rear wall portion 40e at the time of completion of expansion is placed behind the front end of the seat RSS in the rear seat RS (rearward from the knee RK of the rear occupant RP) so as to fill the gap between the side occupant RP and the upper body RU. It is set to a size that can be arranged (see FIG. 20). That is, each protruding expansion portion 40 (40L, 40R) is arranged above the thigh RT of the rear occupant RP seated on the rear seat RS, and in other words, the rear seat RS. It is arranged at a position above the seat surface of the seat portion RSS in the above. Specifically, the protruding expansion portions 40L and 40R are expanded by setting the width dimension of the front end side in the vertical direction at the time of completion of expansion to about 3/4 of the length dimension of the expansion portion 17 in the vehicle width direction in the vertical direction. The lower surface (lower wall portion 40b) of the time is positioned above the thigh RT of the rear occupant RP, and the lower receiving surfaces 41L and 41R (rear wall portion 40e) are located in the lower region of the upper body RU of the rear occupant RP. It is set so as to face (abdominal RA) in the anteroposterior direction. Further, the protruding expansion portion 40 (40L, 40R) is set so that the width dimension on the front-rear direction side when the expansion is completed is about 3.8 times the thickness dimension of the vehicle width direction expansion portion 17. Further, in the case of the embodiment, the protruding expansion portions 40L and 40R are in the left-right direction (vehicle width direction) of the left expansion portion 23 and the right expansion portion 24 in the vehicle width direction expansion portion 17, as shown in FIGS. It is arranged over almost the entire area. That is, each of the protruding expansion portions 40L and 40R is configured so that the inner wall portion 40c on the inner side in the vehicle width direction is brought close to the expansion portion 27 in the front-rear direction (see FIG. 8).

The front side projecting expansion portions 45L and 45R are located in the front expansion portion 33 of the front-rear direction expansion portion 27 at positions close to the vehicle width direction expansion portion 17, respectively, in the front seat FS (driver's seat DS, passenger seat). It is arranged so as to project toward PS) (see FIG. 17). Each front side protruding expansion portion 45 (45L, 45R) covers the side (inside in the vehicle width direction) of the front occupant FP in the lower region of the front expansion portion 33 when the expansion of the airbag 15 is completed. Specifically, in the case of the embodiment, it is arranged so as to close the gap between the front seat FS (driver's seat DS, passenger's seat PS). The front side protruding expansion portions 45 (45L, 45R) have the inner end side in the vehicle width direction on the peripheral edges of the openings 28a, 29a formed in the left wall portion 28 and the right wall portion 29 in the front-rear direction expansion portion 27. By connecting, it is communicated with the front expansion portion 33 (see FIG. 10). Each of the front side protruding expansion portions 45L and 45R is configured to have a flat and substantially rectangular parallelepiped shape when the expansion is completed, and the upper wall portion 45a and the lower wall portion 45b facing each other in the vertical direction when the expansion is completed. A front wall portion 45c and a rear wall portion 45d facing each other on the front-rear direction side, and an outer wall portion 45e arranged on the outside in the vehicle width direction when expansion is completed are provided. The upper wall portion 45a is configured to be inclined so that the region on the outer wall portion 45e side, which is a region about the outer half in the vehicle width direction, is lowered toward the outer wall portion 45e side. The outer wall portion 45e is formed so as to substantially follow the vertical direction in the area of about the lower half of the front side protruding expansion portions 45L and 45R.

The front side protruding expansion portions 45L and 45R are configured to have substantially the same outer shape except that the width dimensions on the front-rear direction side are different, and the arrangement position and the vertical direction on the vertical direction side when the expansion is completed. The width dimension on the directional side is configured to substantially match the protruding expansion portions 40L and 40R. That is, the front side protruding expansion portions 45L and 45R are arranged at positions above the seating surface of the seat portion FSS in the front seat FS, and are arranged below the abdomen of the front occupant FP. It is configured to thickly inflate the side area. Further, the front side protruding expansion portions 45L and 45R are the front side expansion portion 33 and the front side occupant FP seated in the front seat FS (driver's seat DS, passenger seat PS), respectively, when the expansion of the airbag 15 is completed. It is arranged so as to close the gap between them, and in the case of the embodiment, the width dimension on the vehicle width direction side (the amount of protrusion from the front-rear direction expansion portion 27) at the completion of expansion is the expansion of the protrusion expansion portions 40L and 40R. The width dimension in the front-rear direction (protrusion amount from the expansion portion 17 in the vehicle width direction) at the time of completion is slightly smaller than half (about 5/12), which is slightly smaller than the thickness dimension of the expansion portion 27 in the front-rear direction at the completion of expansion. It is made larger. Further, in the case of the embodiment, the front side protruding expansion portion 45R arranged on the right side (driver's seat DS side) is in the front-rear direction as compared with the front side side protrusion expansion portion 45L arranged on the left side (passenger seat PS side). The width dimension on the side is set small. Specifically, the width dimension of the front side protruding expansion portion 45R on the right side in the front-rear direction is set to about 3/5 of the width dimension of the front side protrusion expansion portion 45L on the left side. The front side protruding expansion portions 45L and 45R are configured so that the rear end side (rear wall portion 45d) at the time of completion of expansion is brought close to the front wall portion 18 in the vehicle width direction expansion portion 17. (See FIG. 8).

The rear side protruding expansion portions 48 (48L, 48R) are located in the rear expansion portion 34 of the front-rear expansion portion 27 at positions close to the vehicle width direction panel portion, respectively, of the rear seat RSs (RS1, RS2). ) (See FIG. 17). When the expansion of the airbag 15 is completed, the rear side protruding expansion portions 48L and 48R cover the side (inside in the vehicle width direction) of the rear occupant RP in the lower region of the rear expansion portion 34. Specifically, in the case of the embodiment, it is arranged so as to close the gap between the rear seats RS (RS1, RS2). The rear side protruding expansion portions 48L and 48R connect the inner end side in the vehicle width direction to the peripheral edges of the openings 28b and 29b formed in the left wall portion 28 and the right wall portion 29 in the front-rear direction expansion portion 27. As a result, it is communicated with the posterior expansion site 34 (see FIG. 11). Each of the rear side protruding expansion portions 48L and 48R is configured to have a flat and substantially rectangular parallelepiped shape when expansion is completed, and the upper wall portion 48a and the lower wall portion 48b facing each other in the vertical direction when expansion is completed. The front wall portion 48c and the rear wall portion 48d facing each other on the front-rear direction side, and the outer wall portion 48e arranged on the outside in the vehicle width direction when the expansion is completed are provided. The upper wall portion 48a is configured to be inclined so that the region on the outer wall portion 48e side, which is a region about the outer half in the vehicle width direction, is lowered toward the outer wall portion 48e side. The outer wall portion 48e is formed so as to substantially follow the vertical direction in an area of about the lower half of each of the rear laterally projecting expansion portions 48L and 48R.

The rear side protruding expansion portions 48L and 48R are configured to have substantially the same outer shape except that the width dimensions on the front-rear direction side are different, and the arrangement position and the arrangement position on the vertical direction side when expansion is completed. The width dimension on the vertical direction side is substantially the same as the protruding expansion portions 40L and 40R and the front side lateral protrusion expansion portions 45L and 45R. That is, the rear laterally projecting expansion portions 48L and 48R are arranged at positions above the seat surface of the seat portion RSS in the rear seat RS and are arranged on the side of the abdomen of the rear occupant RP. It is configured to thickly inflate the lower area. Further, the rear side protruding expansion portions 48L and 48R are arranged so as to close the gap between the rear expansion portion 34 and the rear occupant RP seated on the rear seat RS when the expansion of the airbag 15 is completed. Therefore, the width dimension on the vehicle width direction side at the completion of expansion is substantially the same as the width dimension on the vehicle width direction side of the front side lateral protrusion expansion portions 45L and 45R (the amount of protrusion from the front-rear direction expansion portion 27). That is, it is configured to be slightly larger than the thickness dimension of the front-rear expansion portion 27 when the expansion is completed. In the embodiment, the rear side side protrusion expansion portion 48L arranged on the left side is set to have a smaller width dimension on the front-rear direction side than the rear side side protrusion expansion portion 48R arranged on the right side. Specifically, the rear side protruding expansion portion 48L on the left side has a width dimension on the front-rear direction side set to about 3/5 of the rear side side protrusion expansion portion 48R on the right side. In the airbag 15 of the embodiment, the protruding expansion portions 40L and 40R are arranged so that the inner wall portion 40c is close to the vehicle width direction expansion portion 17, and the rear side lateral protrusion expansion portions 48L, respectively. The 48R is configured so that the front end side (front wall portion 48c) at the completion of expansion is brought close to the rear wall portion 40e in each of the protruding expansion portions 40L and 40R (see FIG. 8). That is, the rear side side protruding expansion portions 48L and 48R are formed so as to be continuous with the protruding expansion portions 40L and 40R, respectively.

Further, in the airbag 15 of the embodiment, the plate shape of the vehicle width direction expansion portion 17 and the front-rear direction expansion portion 27 at the completion of expansion is maintained by arranging the tether inside. Specifically, the tethers are arranged inside the left expansion portion 23 and the right expansion portion 24 in the vehicle width direction expansion portion 17, the front expansion portion 33 in the front-rear expansion portion 27, and the rear expansion portion 34, respectively. The thickness regulation tether 50 that regulates the thickness and the shape regulation tether 53 that is arranged in the intersection 36 between the vehicle width direction expansion portion 17 and the front-rear direction expansion portion 27 and regulates the outer shape of the intersection 36 are It is arranged (see FIGS. 8 to 12). The thickness regulation tether 50 is arranged at the left expansion portion 23 and the right expansion portion 24 so as to connect the front wall portion 18 and the rear wall portion 19 of the vehicle width direction expansion portion 17 (see FIGS. 8 and 9). ), The front expansion portion 33 and the rear expansion portion 34 are arranged so as to connect the left wall portion 28 and the right wall portion 29 of the front-rear expansion portion 27 (see FIGS. 8, 10 and 11). ). Each thickness regulation tether 50 is arranged at three positions above and below the front expansion portion 33, the rear expansion portion 34, the left expansion portion 23, and the right expansion portion 24, respectively, in the horizontal direction. It is arranged substantially over substantially the entire area of each front expansion portion 33, rear expansion portion 34, left expansion portion 23, and right expansion portion 24 (see FIGS. 7 and 8). Further, each thickness regulation tether 50 is composed of two strip-shaped base cloths for tethers 50a and 50a. More specifically, the thickness regulating tether 50 arranged at the upper and lower centers and the lower side in the front expansion portion 33 is divided into two in the front and rear, and is arranged in the upper and lower centers and the lower side in the rear expansion portion 34. The thickness regulation tether 50 to be formed is divided into three parts in the front and rear (see FIG. 7). The shape-regulating tether 53 is composed of four tether base cloths 53a, and is a boundary portion between the front expansion portion 33 and the left expansion portion 23, and the front expansion portion 33 and the right expansion portion 24 in the intersection portion 36. The tips of the four tether base cloths 53a extending from the boundary portion between the tether and the rear expansion portion 34 and the left expansion portion 23, or the boundary portion between the rear expansion portion 34 and the right expansion portion 24, respectively. They are arranged in a substantially "x" shape when viewed from the vertical side so as to be connected to each other (see FIG. 12). The shape-regulating tether 53 is continuously arranged in the intersection portion 36 over substantially the entire upper and lower parts except for the upper and lower end sides (see FIG. 7).

The airbag 15 is made of a flexible sheet body, and in the case of the embodiment, the airbag 15 is made of a flexible woven fabric made of polyester yarn, polyamide yarn, or the like. The airbag 15 has a bag shape by connecting the peripheral edges of a base material having a predetermined shape to each other. Specifically, as shown in FIGS. 13 to 16, the upper surface constituent panel 60 and the lower surface constituent panel 60 are formed. It is composed of 61, a side surface configuration panel portion 63, front side side protrusion panel portions 70L and 70R, rear side side protrusion panel portions 74L and 74R, and protrusion panel portions 78L and 78R. ing.

As shown in FIG. 13, the upper surface configuration panel 60 has a substantially cross-shaped outer shape, and constitutes upper wall portions 20 and 30 of the vehicle width direction expansion portion 17 and the front-rear direction expansion portion 27. As shown in FIG. 14, the lower surface configuration panel 61 has a substantially cross shape similar to that of the upper surface configuration panel 60, and the lower wall portion 21 of the vehicle width direction expansion portion 17 and the front-rear direction expansion portion 27, 31 is configured.

As shown in FIGS. 13 to 16, each of the side surface constituent panel portions 63 has a substantially rectangular shape, and the front wall portion 18 to the front-rear expansion portion 27 in the left expansion portion 23 of the vehicle width direction expansion portion 17 expands forward. The front left panel 64 constituting the left wall portion 28 in the portion 33 and the front wall portion 18 in the right expansion portion 24 of the vehicle width direction expansion portion 17 to the right wall portion 29 in the front expansion portion 33 of the front-rear expansion portion 27. The front right panel 65 and the rear left panel 66 constituting the rear wall portion 19 in the left expansion portion 23 of the vehicle width direction expansion portion 17 to the left wall portion 28 in the rear expansion portion 34 in the front-rear direction expansion portion 27. And the rear right panel 67 constituting the rear wall portion 19 in the right expansion portion 24 of the vehicle width direction expansion portion 17 to the right wall portion 29 in the rear expansion portion 34 of the front-rear expansion portion 27. It is composed of wood. The front left panel 64 and the front right panel 65 are configured to have substantially the same outer shape, and the rear left panel 66 and the rear right panel 67 are configured to have substantially the same outer shape.

In the front left panel 64, the upper edge 64a is connected to the left front side edge 60a in the upper surface configuration panel 60, the lower edge 64b is connected to the left front side edge 61a in the lower surface configuration panel 61, and the side edge 64c is connected to the front right panel. It is coupled with the side edge 65c of 65 and the side edge 64d is coupled with the side edge 66c of the rear left panel 66. In the front right panel 65, the upper edge 65a is connected to the right front side edge 60b in the upper surface constituent panel 60, the lower edge 65b is connected to the right front side edge 61b in the lower surface constituent panel 61, and the side edge 65d is connected to the rear right panel. Combined with the side edge 67c of 67. In the rear left panel 66, the upper edge 66a is connected to the left rear edge 60c in the upper surface configuration panel 60, the lower edge 66b is connected to the left rear edge 61c in the lower surface configuration panel 61, and the side edge 66d is connected to the rear edge 66d. Combined with the side edge 67d of the right panel 67. The rear right panel 67 has an upper edge 67a coupled to the right rear edge 60d of the top panel 60 and a lower edge 67b coupled to the right rear edge 61d of the bottom panel 61.

The front side projecting panel portions 70L and 70R constitute the front side projecting expansion portions 45L and 45R, respectively, and as shown in FIGS. 13 and 14, the upper panels of the front side projecting expansion portions 45L and 45R The substantially rectangular central panels 71L and 71R forming from the wall portion 45a through the outer wall portion 45e to the lower wall portion 45b, and a pair of edge side panels 72FL, 72FR, 72RL forming the front wall portion 45c and the rear wall portion 45d, It is equipped with 72RR. These central panels 71L, 71R and the veranda panels 72FL, 72FR, 72RL, 72RR form front side protruding expansion portions 45L, 45R with one end side opened by connecting the corresponding edge portions to each other. The peripheral edges of the openings in the front lateral protruding expansion portions 45L and 45R are coupled to the peripheral edges of the openings 28a and 29a formed in the front left panel 64 or the front right panel 65, respectively.

The rear side projecting panel portions 74L and 74R constitute the rear side side projecting expansion portions 48L and 48R, respectively, and as shown in FIGS. 15 and 16, the rear side side protrusion expansion portions 48L, The substantially rectangular central panels 75L and 75R forming from the upper wall portion 48a through the outer wall portion 48e to the lower wall portion 48b in 48R, and a pair of edge side panels 76FL and 76FR constituting the front wall portion 48c and the rear wall portion 48d. , 76RL, 76RR, and so on. These central panels 75L, 75R and the veranda panels 76FL, 76FR, 76RL, 76RR form rear side protruding expansion portions 48L, 48R with one end side opened by connecting the corresponding verandas to each other. Therefore, the peripheral edges of the openings in the rear laterally projecting expansion portions 48L and 48R are coupled to the peripheral edges of the openings 28b and 29b formed in the rear left panel 66 or the rear right panel 67, respectively.

The projecting panel portions 78L and 78R constitute the projecting expansion portions 40L and 40R, respectively, and as shown in FIGS. 15 and 16, the rear wall portion 40e is formed from the upper wall portion 40a of the projecting expansion portions 40L and 40R. It is provided with a substantially rectangular central panel 79L, 79R forming the lower wall portion 40b, and a pair of edge side panels 80OL, 80IL, 80IR, 80OR forming the inner wall portion 40c and the outer wall portion 40d. These central panels 79L, 79R and the veranda panels 80OL, 80IL, 80IR, 80OR form protruding expansion portions 40L, 40R with one end open by connecting the corresponding edge portions to each other. The peripheral edges of the openings in the protruding expansion portions 40L and 40R are coupled to the peripheral edges of the openings 19a formed in the rear left panel 66 or the rear right panel 67, respectively.

As shown in FIG. 1, in the vehicle V on which the occupant protection device M of the embodiment is mounted, an airbag device 85 for the steering wheel is mounted in front of the driver's seat DS as the front seat FS, and the front An airbag device 88 for the passenger seat is mounted in front of the passenger seat PS as the passenger seat FS, and for head protection on the upper edge side of the side windows SWL and SWR of the front seat FS and the rear seat RS. The airbag devices 92L and 92R of the above are installed. The airbag device 85 for the steering wheel and the airbag device 88 for the passenger seat inflate the airbags 86 and 89 at the time of a frontal collision, an oblique collision, or an offset collision of the vehicle V, and the front parts thereof. In front of the front occupant FP seated in the seat FS (driver's seat DS, passenger's seat PS), there is an airbag 86 for the steering wheel that has been expanded so as to cover the steering wheel W, and an inflated passenger's seat. It will be covered by the airbag 89 (see FIG. 17). The airbag devices 92L and 92R for head protection inflate the airbags 93L and 93R at the time of an oblique collision, an offset collision, or a side collision of the vehicle V, and the front side occupant FP and the rear side occupant RP The outside in the vehicle width direction is covered with airbags 93L and 93R for head protection that have been expanded so as to cover the windows SWL and SWR (see FIG. 17). Then, in the occupant protection device M of the embodiment, the inflator 10 operates in response to an operation signal from the control device at the time of a frontal collision, an oblique collision, an offset collision, or a side collision of the vehicle V. The airbag 15 causes the expansion gas to flow into the inside and protrudes downward from the roof head lining 5, and completes the expansion as shown in FIGS. 17 to 19.

In the occupant protection device M of the embodiment, the airbag 15 expands in a plate shape so as to continuously cover the front of the rear seats RS1 and RS2, and the vehicle width direction expansion portion 17 and the vehicle width direction expansion portion 17. It is configured to include a protruding expansion portion 40 (40L, 40R) that partially protrudes from the rear surface side, and the protruding expansion portion 40 (40L, 40R) is a rear side occupant seated on each of the rear seats RS1 and RS2. The configuration is arranged so as to face the RP (see FIGS. 19 to 21). Therefore, when the rear occupant RP moves forward toward the airbag 15 at the time of the collision of the vehicle V, the rear occupant RP is moved by the protruding expansion portions 40L and 40R which are arranged relative to each other. It can be restrained stably. Specifically, the protruding expansion portions 40L and 40R are on the lower side of the upper body RU of the rear occupant RP that moves forward by the lower receiving surfaces 41L and 41R formed of the rear surface (rear wall portion 40e) when the expansion is completed. (Abdominal RA), and then the upper receiving surfaces 42L, 42R connected to the lower receiving surfaces 41L, 41R will receive the chest RB, which is the upper region of the upper body RU of the rear occupant RP. The protruding expansion portions 40L and 40R can accurately restrain the rear occupant RP that moves forward (see FIG. 20). Further, in the occupant protection device M of the embodiment, in the airbag 15 when the expansion is completed, the vehicle width direction expansion portion 17 continuously covers the front of the rear seats RS1 and RS2 as shown in FIGS. 19 and 21. As described above, since it is formed in a substantially plate shape that is continuously formed substantially along the vehicle width direction, for example, the vehicle width is such that the rear occupant RP deviates from the arrangement region of the protruding expansion portions 40L and 40R. Even if the vehicle moves diagonally forward on the central side of the direction, the vehicle width direction expansion portion 17 can restrict further forward movement.

Therefore, in the occupant protection device M of the embodiment, the occupant RP can be stably protected.

In particular, in the occupant protection device M of the embodiment, the protruding expansion portions 40L and 40R descend rearward when viewed from the vehicle width direction so that the upper receiving surfaces 42L and 42R descend toward the lower receiving surfaces 41L and 41R. In other words, the upper receiving surfaces 42L and 42R are arranged so as to substantially follow the abdominal RA from the chest RB to the head RH received by the lower receiving surfaces 41L and 41R. Therefore, the head RH of the rear occupant RP can be softly received by the upper receiving surfaces 42L and 42R.

Further, in the occupant protection device M of the embodiment, the airbag 15 extends rearward from the vicinity of the center of the vehicle width direction expansion portion 17 so as to partition between the rear seats RS1 and RS2 which are arranged separately from each other. The front-rear direction expansion portion 27 having such a substantially plate shape is arranged, and the front-rear direction expansion portion 27 is arranged so as to substantially follow the vertical direction and covers the side of the rear occupant RP. It is configured to be possible (see FIGS. 17 and 18). Therefore, the rear seats RS1 and RS2 can be partitioned by the front-rear direction expansion portion 27 which inflows the expansion gas into the airbag 15 when the expansion is completed and expands in a plate shape. Even if the occupant RP moves to the side that is the center side in the vehicle width direction, it can be restrained by the front-rear direction expansion portion 27 that expands between the rear seats RS1 and RS2. If such a point is not taken into consideration, the airbag may be configured not to have a front-rear expansion portion.

Further, in the occupant protection device M of the embodiment, the front-rear expansion portion 27 includes a front expansion portion 33 arranged so as to extend forward from the vehicle width direction expansion portion 17, and the front expansion portion 33 is the vehicle width. The front seats FS (driver's seat DS, passenger seat PS) are arranged side by side so as to be separated from each other on the directional side, and the front seat FS (driver's seat) is arranged so as to be substantially along the vertical direction. It is configured so that it can cover the side of the front occupant FP seated in the DS (passenger seat PS) (see FIGS. 17 and 18). Therefore, even if the front occupant FP seated in the front seat FS (driver's seat DS, passenger seat PS) moves to the side that is the center side in the vehicle width direction, the front seat FS (driver's seat DS) , The front expansion portion 33 of the front-rear expansion portion 27 expanding between the passenger seat PS) can be restrained. If such a configuration is not taken into consideration, an airbag that does not have a front expansion portion and has a front-rear expansion portion that is arranged only between the rear seats may be used.

Furthermore, in the occupant protection device M of the embodiment, the rear expansion portion 34 of the front-rear expansion portion 27 is located near the vehicle width direction expansion portion 17 and is located above the seat surface of the rear seat RS, respectively. At the position, the rear side protruding expansion portions 48L and 48R, which are arranged so as to project toward the rear seats RS1 and RS2, are formed, so that they are laterally located on the center side in the vehicle width direction. The rear side occupant RP moving toward the rear side can be accurately restrained by the rear side side protruding expansion portions 48L and 48R. If such a point is not taken into consideration, the airbag is configured to cover the space between the rear seats only with the rear expansion portion of the plate-shaped front-rear expansion portion and not to have the rear side-protruding expansion portion. May be used.

Furthermore, in the occupant protection device M of the embodiment, the front expansion portion 33 is located near the expansion portion 17 in the vehicle width direction, respectively, above the seat surface of the front seat FS (driver's seat DS, passenger seat). Since the front side protruding expansion portions 45L and 45R, which are arranged so as to project toward each front seat FS (driver's seat DS, passenger seat), are formed at the positions to be obtained, the vehicle width direction The front side occupant FP that moves toward the side, which is the central side, can be accurately restrained by the front side side protruding expansion portions 45L and 45R. If such a point is not taken into consideration, an airbag having a structure in which the space between the front seats is covered only by the front side portion of the plate-shaped front-rear direction expansion portion and the front side side protrusion expansion portion is not provided is used. You may.

Furthermore, in the occupant protection device M of the embodiment, since the rear side protruding expansion portions 48L and 48R are formed so as to be continuous with the protruding expansion portions 40L and 40R, respectively, the rear side lateral protrusions As shown in FIG. 21, the expansion portions 48L and 48R and the protruding expansion portions 40L and 40R are continuously arranged from the front of the rear occupant RP to the side of the center side in the vehicle width direction. Even if the side occupant RP moves diagonally forward on the center side in the vehicle width direction, the rear occupant RP is referred to as the rear side lateral protruding expansion portions 48L, 48R and the protruding expansion portions 40L, 40R. Can be properly restrained. If such a point is not taken into consideration, an airbag having a configuration in which the rear side lateral protruding expansion portion and the protruding expansion portion are arranged so as to provide a large gap between them is used. May be good. Even when the rear side side protruding expansion part and the protrusion expansion part are arranged so as to provide a large gap between them, either the rear side side protrusion expansion part or the protrusion expansion part is set to the width of the vehicle. If it is arranged so as to extend to an area close to the intersection of the directional panel portion and the front-rear direction panel portion, it moves diagonally forward on the center side in the vehicle width direction depending on the area arranged near the intersection. The side occupants can be stably restrained.

In the embodiment, it is described that the occupant protection device M is operated in the vehicle V in which the front seats and the rear seats are arranged so as to face the traveling direction side of the vehicle, respectively. The protective device M can also be mounted on a vehicle in which various seat arrangements can be set. For example, when mounted on a vehicle capable of automatic driving, side-by-side arrangement (see FIG. 22) such that the front seats FS1 and FS2 and the rear seats RS1 and RS2 face each other in the vehicle width direction, or the vehicle Face-to-face arrangements that face each other on the front-rear side (see FIG. 23), cross-arrangements that face each other while tilting with respect to the front-rear direction and the vehicle width direction (see FIG. 24), respectively. Even when the airbag is rotated, the airbag 15 at the time of completion of expansion is arranged so as to partition the front seats FS1, FS2 and the rear seats RS1 and RS2 by the vehicle width direction expansion portion 17 and the front-rear direction expansion portion 27. Therefore, the front occupant FP and the rear occupant RP seated in the front seats FS1, FS2, and the rear seats RS1 and RS2 move so as to approach each other when the impact force on the vehicle acts. Even so, the front-side occupant FP and the rear-side occupant RP can be accurately protected by the airbag 15 that has completed expansion. In particular, in the airbag 15 of the occupant protection device M of the embodiment, the protruding expansion portions 40L, 40R, the front side protrusion expansion portions 45L, 45R, and the rear side side protrusion expansion portions 48L, 48R are on the vertical side. It is arranged so as to match the positions, and is composed of a region extending in all directions from the intersection 36 (a region composed of the left expansion portion 23 and the protruding expansion portion 40L, and a right expansion portion 24 and the protruding expansion portion 40R). A region, a region composed of the front expansion portion 33 and the front side protrusion expansion portions 45L and 45R, and a region composed of the rear expansion portion 34 and the rear side protrusion expansion portions 48L and 48R), respectively. Since the thickness is substantially the same and the seat is configured to expand thickly, it is possible to stably protect the occupant seated in the seat regardless of the direction in which the seat is rotated. ..

5 ... Roof head lining, 10 ... Inflator, 15 ... Airbag, 17 ... Vehicle width direction expansion part, 23 ... Left side expansion part, 24 ... Right side expansion part, 27 ... Front and rear direction expansion part, 33 ... Front side expansion part, 34 ... Rear swelling part, 36 ... Crossing part, 40 (40L, 40R) ... Overhanging swelling part, 41 (41L, 41R) ... Abdominal receiving surface, 42 (42L, 42R) ... Upper body receiving surface, 45 (45L, 45R) ) ... Front side protruding expansion part, 48 (48L, 48R) ... Rear side side protruding expansion part, FS ... Front seat, RS ... Rear seat, FP ... Front occupant, RP ... Rear occupant, RU ... Upper body, RA ... abdomen, RB ... chest, R ... roof, V ... vehicle, M ... occupant protection device.

Claims (6)

It has an airbag that can be folded and stored in the roof of the vehicle, allows expansion gas to flow into the vehicle, and expands and expands so as to project downward, by the airbag when expansion is completed. It is an occupant protection device that can protect the occupants seated in the seat.
When the airbag completes expansion,
It expands by inflowing expansion gas into the inside, and is continuously formed along the vehicle width direction so as to continuously cover the front of each rear seat in front of the rear seats arranged side by side in the vehicle width direction. A roughly plate-shaped expansion part in the vehicle width direction,
A protruding expansion portion arranged so as to project from the rear surface side of the vehicle width direction expansion portion toward the rear seat side, respectively.
It is configured to have
The vehicle width direction expansion portion is arranged so as to substantially follow the vertical direction, and is configured to cover the front of the rear occupant seated in each of the rear seats.
The protruding expansion portion is arranged in the lower region of the vehicle width direction expansion portion so as to face the rear side occupant, and the outer shape is substantially rectangular parallelepiped, and the rear surface when expansion is completed is the rear side occupant. The lower area of the upper body in the above is a receiveable lower receiving surface, and the upper surface at the time of completion of expansion arranged so as to be continuous from the lower receiving surface receives the upper area of the upper body of the rear occupant. An occupant protection device characterized in that it is configured as a stoptable upper receiving surface. The airbags are expanded by inflowing expansion gas into the rear seats so as to partition the rear seats which are separately arranged from each other, and extend rearward from the vicinity of the center of the expansion portion in the vehicle width direction. It is configured to have a front-rear direction expansion part that is roughly plate-shaped.
The occupant protection device according to claim 1, wherein the front-rear expansion portion is arranged so as to substantially follow the vertical direction so as to be able to cover the side of the rear occupant. The front-rear expansion portion is configured to include a front expansion portion arranged so as to extend forward from the vehicle width-direction expansion portion.
The front expansion portion is arranged between the front seats arranged side by side so as to be separated from each other on the vehicle width direction side, and is arranged substantially along the vertical direction and is seated on the front seat. The occupant protection device according to claim 2, wherein the occupant protection device is configured so as to be able to cover the side surface of the vehicle. At the rear expansion portion of the front-rear expansion portion arranged on the rear side of the vehicle width direction expansion portion, at positions close to the vehicle width direction expansion portion, respectively, above the seat surface of the rear seat. The occupant protection device according to claim 3, wherein a rear side side projecting expansion portion arranged so as to project toward each rear seat side is formed at the position. In the front expansion portion, the front expansion portion is arranged so as to project toward each front seat at a position near the expansion portion in the vehicle width direction and at a position above the seat surface of the front seat. The occupant protection device according to claim 4, wherein the front side lateral protrusion expansion portion is formed. The occupant protection device according to claim 4 or 5, wherein the rear side lateral protruding expansion portion is formed so as to be continuous with the protruding expansion portion.

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