JP2021123245A - Air bag device for front passenger seat - Google Patents

Abstract

To provide an air bag device for front passenger seat which can stably protect a head of a crewman by a projecting expansion part.SOLUTION: A connection member 61, which is configured from a sheet body having flexibility and connects a body expansion part side wall part 31 side and a separation side wall part 30 side facing the body expansion part side wall part on a longitudinal direction side is provided in a projecting expansion part 29 in an air bag 15 so as to extend substantially along a cross direction. The connection member is so configured as to extend a separation side binding part 64, which binds a body side terminal on a body expansion side to the body expansion part side wall part and binds a separation side terminal 61c to the separation side wall part, and binds the separation side terminal to the separation side wall part, forward with respect to a restraint surface 36 for front collision when viewed from the longitudinal direction side at the time of expansion completion.SELECTED DRAWING: Figure 12

Description

INDUSTRIAL APPLICABILITY The present invention is folded and stored in a storage portion provided in an instrument panel arranged in front of an occupant seated in a passenger seat, and an expansion gas is allowed to flow into the interior to expand and project toward the rear of the vehicle. The present invention relates to an airbag for a passenger seat, which is configured to include an airbag configured to protect an occupant.

Conventionally, as an airbag device for a passenger seat, a main body expansion portion in which the front end side when expansion is completed is attached to a storage portion, and a rear surface side of the main body expansion portion when expansion is completed are partially from the edge side on at least one side in the left-right direction. There was a configuration including an airbag having a protruding expansion portion arranged so as to project rearward. In this conventional passenger seat airbag device, a band-shaped connecting member for connecting the wall portions facing each other on the left-right direction side is arranged in the region of the protruding expansion portion of the airbag (for example). , Patent Document 1). In this conventional passenger seat airbag device, the connecting member is configured to extend in the front-rear direction.

JP-A-2019-81497

In this conventional passenger seat airbag device, the connecting members are arranged substantially along the front-rear direction for the purpose of smooth inflow of expansion gas into the protruding expansion portion. Further, in the conventional passenger seat airbag device, when the expansion of the airbag is completed, the rear surface of the main body inflating portion when the expansion is completed receives the head of the occupant who moves forward when the vehicle collides in front of the vehicle, and the main body in the protruding inflating portion. The side wall portion of the main body expanding portion connected from the rear surface of the expanding portion protects the head of the occupant who moves diagonally forward in the event of an oblique collision or an offset collision of the vehicle. However, in the conventional passenger seat airbag device, although the connecting member is arranged so as to substantially follow the front-rear direction in the protruding expansion portion, it is not for ensuring the strength. When the head cannot be received by the protruding expansion part due to the acceleration toward the diagonally forward direction, and the protruding expansion part bends away from the main body expansion part with the vicinity of the boundary portion with the main body expansion part as the bending point. There was room for improvement in that the protruding expansion part stably protected the occupant's head.

The present invention solves the above-mentioned problems, and an object of the present invention is to provide a passenger seat airbag device capable of stably protecting the head of an occupant by a protruding expansion portion.

The passenger seat airbag device according to the present invention is folded and stored in a storage portion provided in an instrument panel arranged in front of an occupant seated in the passenger seat, and expands by inflowing expansion gas into the inside. It is configured to be equipped with an airbag that projects toward the rear of the vehicle while being able to protect the occupants.
The airbag
The front end side when expansion is completed is attached to the storage part, and the main body expansion part that expands and expands so as to protrude rearward from the storage part,
On the rear surface side of the main body expansion portion when the expansion is completed, a protruding expansion portion arranged so as to partially project rearward from the edge side of at least one side in the left-right direction,
Have,
The rear surface of the expansion portion of the main body when expansion is completed constitutes a front collision restraint surface that can protect the head of an occupant who moves forward when the vehicle front impacts.
In the protruding expansion portion, the side wall portion of the main body expansion portion arranged so as to be continuous from the front collision restraint surface when the expansion is completed can protect the head of the occupant who moves diagonally forward at the time of an oblique collision or an offset collision of the vehicle. Consists of a restraint surface for oblique collision,
The inside of the protruding expansion portion is composed of a flexible sheet body, and the side wall portion of the main body expansion portion and the side wall portion of the separation side wall facing the side wall portion of the main body expansion portion in the left-right direction when the expansion is completed. A passenger seat airbag device having a structure in which a connecting member for connecting the two members is arranged so as to extend substantially along the front-rear direction.
The connecting member connects the main body side terminal on the main body expansion portion side to the main body expansion portion side wall portion, the separation side terminal to the separation side wall portion, and the separation side connection portion for connecting the separation side terminal to the separation side wall portion. It is characterized in that it is configured so as to extend forward from the restraint surface for front collision when viewed from the left-right direction side when the expansion is completed.

In the passenger seat airbag device of the present invention, when the expansion of the airbag is completed, the connecting member that connects the separation side wall portion and the main body expansion portion side wall portion inside the protrusion expansion portion is connected to the separation side wall portion in the protrusion expansion portion. It is configured so that the separation side binding site to be formed extends forward beyond the front collision restraint surface. That is, in the passenger seat airbag device of the present invention, a connecting member made of a flexible seat body is arranged in a protruding expansion portion of the airbag when expansion is completed in a state of being stretched substantially along the front-rear direction. On the side of the separation side wall of the protruding expansion part, a rod-shaped separation side binding site substantially along the front-rear direction is arranged so as to enter the area of the side wall part of the main body expansion part on the side of the protrusion expansion part. It will be set up. Therefore, when the airbag is inflated, the connecting member exerts tension to exhibit plate-like rigidity, and further, the separation side binding site of the connecting member exhibits linear rigidity substantially along the front-rear direction. Since it acts like a rod-shaped reinforcing material along the front-rear direction, it prevents bending in the area extending from the separated side wall portion near the boundary portion with the main body expanding portion to the side wall portion of the main body expanding portion. can. As a result, when the expansion of the airbag is completed, the head of the occupant moving diagonally forward is brought into contact with the restraint surface for oblique collision, and when the protruding expansion portion receives the head of the occupant, Even if the protruding expansion portion is pressed with a strong force, the separation side binding site is arranged so as to extend forward beyond the front collision restraint surface (the boundary portion between the protruding expansion portion and the main body expansion portion). It is possible to prevent the protruding expansion portion from being deformed by the connecting member, and to prevent the protruding expansion portion from being bent away from the main body expansion portion with the vicinity of the boundary portion with the main body expansion portion as a bending point. Since the reaction force does not decrease due to bending, the occupant's head can be stably restrained by the protruding expansion portion.

Therefore, in the passenger seat airbag device of the present invention, the head of the occupant can be stably protected by the protruding expansion portion.

Further, in the passenger seat airbag device of the present invention, a restraint recess for allowing the head of an occupant to enter and restrain is recessed forward between the front collision restraint surface and the oblique collision restraint surface. In this way, arrange,
In the case where the recess tether connected to the tip end side of the recess of the restraining recess is arranged inside the airbag so as to suppress the movement of the restraining recess to the rear during expansion and expansion.
The connecting member is configured by arranging at least two connecting portion main bodies composed of a flexible sheet body side by side in the vertical direction, and each connecting portion main body is connected to the separating side wall portion. Are arranged so as to have regions that overlap in the vertical direction and at least one of them extends forward from the front collision restraint surface, and the main body side terminal in one of the main body of the connecting portion is provided on the side wall of the main body expanding portion. It may be configured so as to be connected to the portion and the terminal on the main body side of the other connecting portion main body to be connected to the tip end side of the recess of the restraint recess.

When the passenger seat airbag device has such a configuration, the front collision restraint surface and the oblique collision restraint surface are separated from each other by the one connecting portion main body of the connecting member and the recessed tether. In the above, the head of the occupant who moves diagonally forward can smoothly enter the restraint recess which is stably arranged so as to be recessed forward. Therefore, in the case of an oblique collision or an offset collision of the vehicle, the head of the occupant moving diagonally forward can be accurately protected by the oblique collision restraint surface and the restraint recess. Further, in the passenger seat airbag device having the above configuration, in the connecting member formed by arranging at least two connecting portion main bodies side by side on the vertical direction side, the main body side terminal of one connecting portion main body is restrained for front collision. Even if it is configured to be connected to the tip end side of the recess of the restraint recess formed between the surface and the restraint surface for oblique collision, the two separation side joint portions are partially overlapped on the vertical direction side and are also connected. Since at least one of them is arranged so as to extend forward from the restraint surface for front collision, when the protruding expansion portion receives the occupant's head, the bending point is near the boundary portion with the main body expansion portion. As a result, it is possible to suppress bending away from the main body expanding portion and not to cause a decrease in reaction force due to bending, so that the protruding expanding portion can stably restrain the occupant's head.

Further, in the passenger seat airbag device having the above configuration, the two separation side binding sites are arranged so as to overlap in the vertical direction over substantially the entire front and rear directions with substantially the same length dimension in the front-rear direction. If this is the case, it is preferable that the bending deformation of the protruding expansion portion with respect to the main body expansion portion when the occupant's head is received can be further suppressed. Further, if the number of the connecting portion main bodies arranged in the connecting member is increased to three or four, the bending deformation of the protruding expanding portion with respect to the main body expanding portion when the occupant's head is received is further suppressed. be able to.

Furthermore, in the passenger seat airbag device having the above configuration, a restraint recess for allowing the occupant's head to enter and restrain is recessed forward between the front collision restraint surface and the oblique collision restraint surface. Arrange it in such a way
In the case where the recess tether connected to the tip end side of the recess of the restraining recess is arranged inside the airbag so as to suppress the movement of the restraining recess to the rear during expansion and expansion.
In the connecting member, the main body side connecting portion for connecting the main body side terminal to the side wall portion of the main body expanding portion may be arranged so as to straddle from the side wall portion of the main body expanding portion to the wall portion forming the restraining recess. preferable.

If the passenger seat airbag device has such a configuration, the main body side binding site is arranged so as to extend back and forth longer than in the case where the main body side binding site is formed only in the area of the protruding expansion portion. In other words, the area of the connecting member can be secured widely, and the deformation of the protruding expansion portion at the time of receiving the occupant can be further suppressed.

Furthermore, in the passenger seat airbag device having the above configuration, the protruding inflatable portion has a cross section substantially along the horizontal direction when the expansion is completed, and the top portion on the rear end side is separated from the center in the left-right direction of the protruding inflatable portion. If it is configured so as to be displaced to the side of, the restraint surface for oblique collision will be arranged so as to be inclined with respect to the front-rear direction, with respect to the head of the occupant moving diagonally forward. It can be arranged so as to substantially face each other, and the head of the occupant can be accurately protected as compared with the case where the restraint surface for oblique collision is arranged so as to substantially follow the front-rear direction. Further, when the protruding expansion portion is configured such that the top portion on the rear end side is displaced from the center in the left-right direction of the protruding expansion portion toward the side wall portion of the separation, the protruding expansion portion is located on the rear end side. Although the wall becomes thin and tapered, the connecting member can suppress bending of the occupant's head with respect to the expanding portion of the main body when the head is received, and can stably protect the occupant's head.

It is a perspective view of the state seen from diagonally right rear view which shows the state which the airbag used in the passenger seat airbag device which is one Embodiment of this invention is inflated by itself. It is a left side view of the airbag of FIG. It is a schematic vertical cross-sectional view of the airbag of FIG. 1, and is the cross-sectional view at the part of the concave part for restraint. It is a schematic cross-sectional view of the airbag of FIG. It is a partially enlarged vertical cross-sectional view along the left-right direction at the portion of the restraint recess in the airbag of FIG. 1, and corresponds to the VV portion of FIG. It is a top view of the left and right tethers used in the airbag of FIG. It is a top view which shows the base cloth which constitutes the airbag of FIG. It is a top view which shows the rest of the base cloth which constitutes the airbag of FIG. FIG. 5 is a schematic view of the passenger seat airbag device of the embodiment as viewed from the rear side of the vehicle showing a state in which the airbag has completed expansion. FIG. 5 is a schematic cross-sectional view showing a state in which the airbag has completed expansion in the passenger seat airbag device of the embodiment. FIG. 5 is a schematic cross-sectional view showing a state in which the head of an occupant is received by a protruding expansion portion of the airbag when expansion is completed in the passenger seat airbag device of the embodiment. FIG. 5 is a schematic side view showing a state in which the airbag has completed expansion in the passenger seat airbag device of the embodiment. It is a schematic cross-sectional view which shows the state in which the airbag which is another Embodiment of this invention is inflated by itself. It is a schematic side view in the vehicle-mounted state in which the airbag of FIG. 13 is inflated. It is a schematic side view which expanded the airbag which is still another Embodiment of this invention in a vehicle-mounted state. It is a schematic side view which expanded the airbag which is still another Embodiment of this invention in a vehicle-mounted state. It is a schematic side view which expanded the airbag which is still another Embodiment of this invention in a vehicle-mounted state.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 10, the passenger seat airbag device M (hereinafter, simply abbreviated as “airbag device”) of the embodiment is a passenger seat of a vehicle which is a left-hand drive vehicle in which the passenger seat PS is arranged on the right side. It is arranged inside the instrument panel 1 (hereinafter abbreviated as "instrument panel") in front of the PS. In the embodiment, the front-rear, up-down, and left-right directions coincide with the front-back, up-down, and left-right directions of the vehicle unless otherwise specified.

As shown in FIG. 10, the airbag device M of the embodiment includes an airbag 15, an inflator 8 for supplying an expansion gas to the airbag 15, and a case as a storage portion for accommodating and holding the airbag 15 and the inflator 8. A retainer 9 for attaching the airbag 15 and the inflator 8 to the case 12 is provided. Further, although detailed illustration is omitted, the airbag device M is configured to include an airbag cover that covers the upper part of the folded airbag 15 and has a door portion that can be opened when the airbag 15 is expanded and expanded. Has been done. In the embodiment, the inflator 8 is configured to operate in the event of a frontal collision, an oblique collision, and an offset collision of the vehicle.

As shown in FIGS. 1 to 5, the airbag 15 is a bag body 16 that expands by inflowing an expansion gas into the bag body 16 and a tether that is arranged inside the bag body 16 and regulates the expansion completion shape of the bag body 16. It is configured to include 45, 49, 57, 61, 68.

The bag main body 16 has a bag shape formed from a flexible sheet body, and in the case of the embodiment, as shown in FIGS. 1 to 4, the main body expanding portion 17 and the main body when expansion is completed. The expansion portion 29 is provided so as to partially project rearward from the rear surface side of the expansion portion 17.

The main body expansion portion 17 is arranged between the instrument panel 1 and the windshield 4 (see FIG. 12) when the expansion is completed, and the shape when the expansion is completed is shown in the axial direction in the left-right direction as shown in FIG. A mounting portion 24 to be mounted on the case 12 is provided on the front end side when the expansion is completed, as a substantially triangular columnar shape substantially along the above (see FIGS. 1, 4 and 10). In the airbag 15 of this embodiment, the main body expanding portion 17 is attached to the case 12 on the front end 17a side when the expansion is completed, and when the expansion is completed, as shown in FIGS. It is configured so that it projects to the left, which is the driver's seat side. The main body expansion portion 17 extends forward from the peripheral edge of the rear side wall portion 28 and the rear side wall portion 28, which is arranged on the rear surface side which becomes the occupant MP side when the expansion is completed, and the vertical width dimension is reduced toward the front end 17a side. It includes a tapered peripheral wall portion 18 that is converged.

The peripheral wall portion 18 is a portion mainly arranged between the instrument panel 1 and the windshield 4 when the expansion of the airbag 15 is completed, and the upper wall portion 19 and the lower wall portion are arranged so as to face each other in the vertical direction. 20 and a left wall portion 21 and a right wall portion 22 which are arranged so as to face each other on the left-right direction side. In the airbag 15 of the embodiment, the portion of the peripheral wall portion 18 on the front end side when the expansion is completed is the attachment portion 24 for attaching the airbag 15 to the case 12. The width dimension of the mounting portion 24 on the left-right direction side when expansion is completed is set to be larger than the width dimension of the case 12 on the left-right direction side (see FIG. 10). As shown in FIG. 4, on the lower surface side (lower wall portion 20 side) of the mounting portion 24 when expansion is completed, there is a gas inflow port 25 formed by opening a substantially circular opening so that expansion gas can flow into the inside. A plurality of (four in the case of the embodiment) mounting holes 26 for inserting bolts (not shown) of the retainer 9 are formed on the peripheral edge of the gas inlet 25. Then, the peripheral edge of the gas inflow port 25 is attached to the case 12 by using the retainer 9, so that the airbag 15 is attached to the case 12 at the portion of the attachment portion 24. In the case of the embodiment, the gas inflow port 25 is arranged at a position slightly shifted to the right from the center of the left and right of the mounting portion 24, and the airbag 15 has the center of the gas inflow port 25 as the mounting center C. (See FIG. 4), the mounting center C is mounted on the case 12 so as to substantially coincide with the center of the passenger seat PS in the left-right direction, and is mounted on the vehicle (see FIG. 10). Further, vent holes 27 for exhausting excess expansion gas that has flowed into the inside are formed in the left wall portion 21 and the right wall portion 22 in the peripheral wall portion 18.

The rear side wall portion 28 is arranged so as to substantially follow the vertical direction on the rear surface side on the occupant MP side when the expansion of the airbag 15 is completed, and is partially located on the left edge side portion on the driver's seat side. A protruding expansion portion 29 that expands so as to project rearward is arranged.

When the expansion of the airbag 15 is completed, the protruding expansion portion 29 is arranged at a position diagonally forward to the left of the occupant MP seated in the passenger seat PS (see FIG. 10). The protruding expansion portion 29 communicates with the main body expansion portion 17 on the front end 29a side when the expansion is completed, and the expansion gas flows into the inside through the main body expansion portion 17 (see FIG. 4). As shown in FIGS. It has a substantially trapezoidal shape with a width. Further, the protruding expansion portion 29 includes a left wall portion 30 (separation side wall portion) and a right wall portion 31 (main body expansion portion side wall portion) facing each other in the left-right direction when the expansion is completed. The outer peripheral edges of the left wall portion 30 and the right wall portion 31 are connected to each other. The external dimensions of the protruding expansion portion 29 (the width dimension on the vertical direction side and the width dimension on the front-rear direction side (the amount of protrusion from the rear side wall portion 28)) are the right wall portion 31 (main body) when the expansion of the airbag 15 is completed. The side wall portion of the expansion portion is set to a size that can stably receive the head MH of the occupant MP that moves diagonally forward by the oblique collision restraint surface 37) described later. Further, in the cross section substantially along the horizontal direction (front-back direction) when the expansion is completed, the protruding expansion portion 29 has a top portion on the rear end 29b side, and a side wall portion (left wall portion) separated from the center in the left-right direction of the protruding expansion portion 29. It is configured so as to be displaced to the side of 30) (see FIG. 4). In the case of the embodiment, in the protruding expansion portion 29, when the expansion of the airbag 15 is completed, the left wall portion 30 is connected to the left wall portion 21 in the main body expansion portion 17 and is arranged substantially along the front-rear direction. The right wall portion 31 is arranged so as to be inclined in the front-rear direction so that the rear end side faces the left side (left wall portion 30 side). That is, in the airbag 15 of the embodiment, the protruding expansion portion 29 has the right wall portion 31 so that the top portion on the rear end 29b side is located on the left wall portion 21 side in the cross section along the front-rear direction when the expansion is completed. It has a substantially right-angled triangular shape with the hypotenuse as the side. Specifically, the right wall portion 31 has an inclination angle θ in the front-rear direction of about 30 ° so as to be arranged substantially facing the head MH of the occupant MP moving diagonally forward. It is set (see FIG. 4). The expansion completed shape of the protruding expansion portion 29 (inclined state of the right wall portion 31) is shaped by the left and right tethers 61 arranged inside.

The airbag 15 of the embodiment is configured as a occupant protection unit 35 capable of protecting the occupant MP in the area on the rear side when the expansion is completed. Specifically, in the airbag 15, the protruding expansion portion 29 and the rear side wall portion 28 in the main body expansion portion 17 constitute the occupant protection portion 35. The occupant protection unit 35 moves diagonally forward with the front collision restraint surface 36 capable of protecting the head MH of the occupant MP that moves forward at the time of a front collision of the vehicle, and at the time of an oblique collision or an offset collision of the vehicle. The head MH of the occupant MP is placed between the protective restraint surface 37 for oblique collision, the restraint surface 36 for front collision, and the restraint surface 37 for oblique collision, and the head MH of the occupant MP is allowed to enter and be restrained. It is configured to include a restraining recess 39 for the purpose.

In the case of the embodiment, the front collision restraint surface 36 is composed of the upper region of the rear side wall portion 28, and is arranged on the right side of the protruding expansion portion 29 in the rear side wall portion 28 in the airbag 15 when the expansion is completed. It is composed of the areas to be used. The front collision restraint surface 36 serves as a receiving center 36a for receiving the head MH of the occupant MP moving forward in a region near the intersection with the center line CL along the front-rear direction passing through the mounting center C. It is configured to extend from 36a to the left side (driver's seat side) and right side (side away from the driver's seat), but in the case of the embodiment, as shown in FIG. 4, the left side is on the left side of the center line CL. The width dimension on the left-right direction side of the region is set to about 1/2 of the width dimension on the left-right direction side of the right side region on the right side of the center line CL. Further, in the case of the embodiment, when the expansion of the airbag 15 is completed, the front collision restraint surface 36 faces the front side on the center line CL (near the receiving center 36a) in the cross section substantially along the front-rear direction. It is configured to be slightly recessed (see FIG. 4). Further, in the airbag 15 of the embodiment, in the lower region of the rear side wall portion 28, the occupant MP that moves forward in the case of a front collision, an oblique collision, an offset collision, or the like restrains the head MH by the occupant protection portion 35. When this is done, the chest of the occupant MP is mainly received, and the rear side wall portion 28 (rear end side of the main body expansion portion 17) including the front collision restraint surface 36 has a width substantially equal to that of the occupant's upper body. It is configured to have dimensions (see FIG. 9).

The oblique protrusion restraint surface 37 is composed of a right wall portion 31 as a side wall portion of the main body expansion portion arranged so as to be continuous with the front collision restraint surface 36 when the expansion is completed in the protruding expansion portion 29. The slanting restraint surface 37 is arranged so as to be inclined with respect to the front-rear direction so that the trailing edge 37a is positioned to the left when the expansion of the airbag 15 is completed.

The restraint recess 39 formed between the front collision restraint surface 36 and the oblique collision restraint surface 37 is for allowing the head MH of the occupant MP to enter and restrain it, and in the case of the embodiment, it protrudes. It is formed at the boundary between the region on the right side of the expansion portion 29 and the rear side wall portion 28 in the main body expansion portion 17 so as to substantially follow the vertical direction, and as shown in FIGS. The side is opened and the front is recessed like a pocket. The restraint recess 39 has a substantially rectangular left wall 41 and a right wall 42 that are wide in the vertical direction when viewed from the left-right direction side, and the upper edge and the lower edge of the left wall 41 and the right wall 42 are mutual. , The leading edges are connected (sewn) to each other to form a substantially pocket shape with the rear end 39b side opened. The restraint recess 39 has a length dimension on the vertical direction side (opening width dimension of the opening 40) set to a dimension that allows the head MH of the occupant MP to smoothly enter, and is set on the front-rear direction side. The width dimension (depth) is set so that the region on the front side of the head MH of the occupant MP can enter. Further, in the case of the embodiment, as shown in FIGS. 3 and 4, the restraint recess 39 has the tip (front end 39a) side of the recess in the recess tether 49 arranged in the bag body 16 and the connecting member 60. It is connected to the regulation tether 68 constituting the main body of the connecting portion, and is arranged in a state where the tip of the recess (front end 39a) is pulled forward when the expansion of the airbag 15 is completed. In the case of the embodiment, the restraint recess 39 is suppressed from opening the opening 40 on the rear end 39b side so that the left side wall 41 and the right side wall 42 are brought into contact with each other over substantially the entire area when the expansion of the airbag 15 is completed. In this state, they are arranged so as to be connected to the right wall portion 31 (oblique collision restraint surface 37) of the protruding expansion portion 29 and substantially along the front-rear direction (see FIG. 4).

In the occupant protection portion 35 of the airbag 15 of the embodiment, the protruding expansion portion 29 sets the width dimension L3 on the left-right direction side when the expansion is completed in the left-right direction of the right side region 17b on the right side of the center line CL in the main body expansion portion 17. It is about the same as the width dimension L1 on the side, slightly smaller than this width dimension L1, and 2/3 of the width dimension L2 on the left-right direction side of the left side region 17c on the left side of the center line CL in the main body expansion portion 17. It is configured as a degree (see FIG. 4). Further, the width dimension (protrusion amount from the front collision restraint surface 36) L4 on the front-rear direction side of the protrusion expansion portion 29 is set to be substantially the same as the width dimension L3 on the left-right direction side. That is, in the occupant protection portion 35 of the airbag 15 of the embodiment, the slanting restraint surface 37 (right wall portion 31) arranged to be inclined with respect to the front-rear direction is configured to be wide to the left and right, and the slanting bump is formed. The restraint recess 39 arranged between the restraint surface 37 for front collision and the restraint surface 36 for front collision is arranged at a position on the restraint surface 36 for front collision on the side of the receiving center 36a (FIG. 9). reference). Then, in the case of the embodiment, when the head MH of the occupant MP that moves diagonally forward moves at a shallow angle (by reducing the angle with respect to the front-rear direction) at the time of a diagonal collision of the vehicle, an offset collision, or the like. Is protected by entering the restraint recess 39, and when moving at a deep angle (increasing the angle with respect to the front-rear direction), it comes into contact with the slanted restraint surface 37. It is protected by being received by the protruding expansion portion 29 itself (see FIGS. 10 and 11).

As the tethers arranged in the bag main body 16, as shown in FIGS. The left and right tethers 61, which are mainly arranged in the region of the protruding expansion portion 29, and the regulation tether 68, which is arranged in the region of the main body expansion portion 17, are arranged. Then, in the airbag 15 of the embodiment, the left and right tethers 61 and the regulation tether 68 constitute the main body of the connecting portion in the connecting member 60. That is, inside the protruding expansion portion 29, the right wall portion 31 side as the main body expansion portion side wall portion and the left wall portion as the separation side wall portion facing the main body expansion portion side wall portion (right wall portion 31) on the left-right direction side. The connecting member 60 that connects the 30 side and the 30 side is configured to include a left and right tether 61 and a regulation tether 68.

The front-rear tether 45 connects the vicinity of the portion of the restraint surface 36 for front collision that intersects the center line CL (reception center 36a) with the front end 17a side of the airbag 15 (main body expansion portion 17). As shown in 4, when the expansion of the airbag 15 is completed, the front side portion 46 extending from the peripheral edge of the gas inflow port 25 and the rear side portion extending from the rear side wall portion 28 side are arranged so as to be located on the center line CL. It is configured so as to connect 47 and 47.

In the embodiment, the front side portion 46 is composed of the tether base cloth 52 shown in FIG. 8 together with the concave tether 49. The tether base cloth 52 is shared by a connecting portion 53 connected to the peripheral edge of the gas inflow port 25, a strip-shaped front portion base material 54 extending rearward from the connecting portion 53 to form a front portion 46, and a connecting portion. It is configured to include a strip-shaped portion 55 extending diagonally rearward to the left from 53 to form a recessed tether 49. The front end portion 46 is formed by folding the strip-shaped front portion base material 54, and the outer shape of the bag body 16 at the time of completion of expansion is substantially aligned with the front end 46a side in the left-right direction, and the rear end is formed. It has a three-dimensional shape similar to a substantially triangular pyramid shape so that the 46b side is substantially along the vertical direction. The connecting portion 53 of the base cloth 52 for the tether has an opening (not shown) corresponding to the gas inflow port 25 and the mounting hole 26, and is a peripheral portion of the gas inflow port 25 and is a mounting portion in the main body expansion portion 17. It is configured to be sewn to a portion on the lower surface side of the 24.

The rear side portion 47 has a sheet shape, the outer shape is narrowed on the front end 47a side connected to the front side portion 46, and is expanded vertically toward the rear end 47b side connected to the rear side wall portion 28. It has a substantially trapezoidal shape, and has a configuration in which the rear end 47b side is connected to a position on the center line CL, which is substantially the center of the upper and lower sides of the rear side wall portion 28.

When the expansion of the airbag 15 is completed, the front and rear tethers 45 intersect with the center line CL on the rear side wall portion 28, that is, near the receiving center 36a of the occupant head MH on the front collision restraint surface 36, and the gas flow. It connects the peripheral portion of the inlet 25 (the front end 17a side of the main body expansion portion 17), and excessively protrudes the front collision restraint surface 36 at the initial stage of expansion of the airbag 15 to the rear and before the expansion is completed. It is arranged to suppress the backward movement of the thrust restraint surface 36. Further, in the embodiment, the rear side wall portion 28 is pulled by the front and rear tethers 45, and is positioned on the center line CL when the expansion of the airbag 15 is completed (the receiving center of the front collision restraint surface 36). 36a) is arranged so as to be slightly recessed toward the front side over substantially the entire upper and lower parts (see FIG. 4).

When the expansion of the airbag 15 is completed, the recessed tether 49 has a recessed tip (front end 39a) side of the restraining recess 39 and a front end side of the airbag 15 (front end 17a of the main body expansion portion 17) as shown in FIG. Side) and are arranged so as to be connected. As described above, the recessed tether 49 is composed of the strip-shaped portion 55 of the tether base cloth 52, and by connecting the rear end 55a side of the strip-shaped portion 55 to the front end 39a side of the restraining recess 39. When the expansion of the airbag 15 is completed, the front end 49a side is positioned to the right and the rear end 49b side is positioned to the left so as to be inclined with respect to the front-rear direction (see FIG. 4). ). The recess tether 49 has a length dimension that does not interfere with the regulation of the orientation of the restraint recess 39 by the regulation tether 68 when the expansion of the airbag 15 is completed, and the restraint recess 39 can be pulled forward. , Is set.

As shown in FIG. 4, the left and right tethers 57 arranged in the region of the main body expansion portion 17 connect the front and rear intermediate portions of the front and rear tether 45 and the front and rear intermediate portions of the right wall portion 22 so as to connect them. It is arranged substantially along the left-right direction while substantially following the width direction in the vertical direction. Specifically, the left end 57a is placed near the connecting portion between the front side portion 46 and the rear side portion 47 in the front-rear tether 45. It is configured to be connected by co-sewing, and the right end 57b is connected to a position slightly behind the center of the front and rear of the right wall portion 22. In the case of the embodiment, the left and right tethers 57 are slightly tilted with respect to the left and right directions so that the right end 57b is slightly positioned to the rear side in a state where the expanded airbag 15 is viewed from the vertical direction side. It is a configuration that is arranged. In the case of the embodiment, the left and right tethers 57 are configured by connecting two tether base cloths 58L and 58R arranged side by side in the left and right direction. The left and right tethers 57 regulate the separation distance between the front and rear tethers 45 and the right wall portion 22 when the expansion of the airbag 15 is completed, and the main body expansion portion 17 projects widely to the left and right at the initial stage of expansion of the airbag 15. It is arranged to suppress the expansion.

The left and right tethers 61, which are mainly arranged in the region of the protruding expansion portion 29, are composed of a flexible sheet body, and also have a right wall portion 31 side which is a side wall portion of the main body expansion portion in the protruding expansion portion 29. , The right wall portion 31 (main body expansion portion side wall portion) and the left wall portion 30 side as a separation side wall portion facing in the left-right direction side are arranged so as to be connected when the expansion is completed. Specifically, the left and right tethers 61 are arranged so as to extend substantially along the front-rear direction to connect the left wall portion 30 and the right wall portion 31 (see FIGS. 1, 4 and 5). Specifically, the left and right tethers 61 are configured such that the outer shape is a substantially trapezoidal shape such that the trailing edge 61b side is narrow and the front edge 61a side is wide (see FIG. 6). When the airbag 15 inflated in the mounted state is viewed from the left-right direction side, the airbag 15 is arranged at substantially the center of the upper and lower parts of the protruding inflatable portion 29 so as to be slightly inclined forward (see FIG. 12). The inclination of the left and right tethers 61 is substantially along the movement locus of the head MH of the occupant MP that moves diagonally forward while tilting forward starting from the waist (not shown) (see FIG. 12). Further, in the left and right tethers 61, the length dimension on the front-rear direction side is set to be larger than the width dimension on the front-rear direction side of the protrusion expansion portion 29, and the main body expansion portion 17 starts from the vicinity of the rear end 29b of the protrusion expansion portion 29. It is arranged so as to extend over the area on the left side of the restraint recess 39 (see FIGS. 2 to 4). As shown in FIGS. 4 to 6, the left and right tethers 61 are configured by connecting two tether base cloths 62L and 62R arranged side by side in the left-right direction.

Then, in the case of the embodiment, the left and right tethers 61 connect the right terminal 61d as the main body side terminal on the main body expansion portion 17 side from the right wall portion 31 to the left side wall 41 of the restraint recess 39, and the separation side terminal. The left terminal 61c is connected from the left wall portion 30 to the left wall portion 21 in the main body expansion portion 17 (see FIGS. 2 and 3). Specifically, the left-right tether 61 is configured to have a substantially symmetrical shape (see FIG. 6), and the left terminal 61c and the right terminal 61d are set to have substantially the same length dimension. Then, each of the left terminal 61c and the right terminal 61d forms the left wall portion 30 side and the right wall portion 31 so as to form a continuous substantially linear left binding site 64 and right binding site 65 over substantially the entire length, respectively. It is sewn on the side using suture. That is, in the embodiment, the left binding site 64 as the separating side binding site and the right binding site 65 as the main body side binding site are continuously formed in a substantially linear shape, and the length dimensions are set to be substantially the same. Has been done. The left binding site 64 (separation side binding site) that connects the left terminal 61c from the left wall portion 30 to the left wall portion 21 in the main body expansion portion 17 is a state in which the airbag 15 at the time of completion of expansion is viewed from the left-right direction side. The rear end 64b is located near the rear end 29b of the protruding expansion portion 29, and the front end 64a side is arranged so as to enter the region of the main body expansion portion 17 from the protruding expansion portion 29, that is, the left binding site 64. Is arranged so as to extend forward from the front collision restraint surface 36 when viewed from the left-right direction side when the expansion is completed (see FIG. 2). In the case of the embodiment, the right binding site 65 (main body side binding site) that connects the right terminal 61d from the right wall portion 31 to the left wall portion 41 has a rear end 65b located near the rear end 29b of the protruding expansion portion 29 and is a front end. 65a is positioned near the tip (front end 39a) of the recess of the restraint recess 39, and is arranged so as to straddle from the right wall portion 31 to the left wall portion 41 (see FIG. 3). As described above, the left and right tethers 61 constitute the main body of the connecting portion of the connecting member 60. Further, in the embodiment, by disposing the trapezoidal left and right tethers 61 having a narrow width toward the rear side over substantially the entire front and rear, the protruding expansion portion 29 is tapered toward the rear end 29b side. ,It is configured.

The regulation tether 68 arranged in the region of the main body expansion portion 17 is for restricting the direction of the restraint recess 39, and when the expansion of the airbag 15 is completed, the restraint recess 39 is substantially aligned in the front-rear direction. It is arranged so that it can be arranged. The regulation tether 68 is composed of a flexible sheet body, is arranged so as to extend substantially along the front-rear direction, and has a recessed tip (front end 39a) side of the restraining recess 39 and a front end 39a. It is configured to connect the left wall portion 21 of the main body expansion portion 17 and the left wall portion 21. Specifically, in the case of the embodiment, as shown in FIG. 7, the regulation tether 68 has an external shape such that the right terminal 38b side, which is the restraint recess 39 side, is narrowed, and the left terminal, which is the left wall portion 21 side. It is configured as a substantially trapezoidal shape that expands toward the 68a side and becomes wider, and the left and right tethers 61 overlap the rear side region on the left terminal 68a side vertically with the left and right tethers 61. It is arranged so as to be close to the lower side and substantially along the left and right tethers 61 (see FIGS. 4 and 5). That is, this regulation tether 68 is also in a state in which the airbag 15 inflated in the vehicle-mounted state is viewed from the left-right direction side so as to substantially follow the movement locus of the head MH of the occupant MP moving diagonally forward. Then, it is arranged so as to be slightly inclined forward (see FIG. 12).

In this regulation tether 68, the left terminal 68a as the separation side terminal is sewn with a suture to be connected to the left wall portion 21 in the main body expansion portion 17, and the right terminal 68b is recessed in the restraint recess 39. In the case of the embodiment, the right terminal 68b is co-sewn together with the rear end 49b of the recess tether 49, and the tip (front end) of the recess of the restraint recess 39 is sewn together. It is connected to the 39a) side (see FIG. 4). This regulation tether 68 cooperates with the recess tether 49 to adjust the width dimension on the left-right direction side (separation distance between the left terminal 68a and the right terminal 68b), and when the expansion of the airbag 15 is completed, the restraint recess 39 is formed. , It is set to a size that can be pulled forward while roughly following the front-back direction. In the regulation tether 68, the left binding site 70 as the separating side binding site that binds the left terminal 68a to the left wall 21 is a substantially linear shape (in the case of the embodiment, formed continuously over substantially the entire length of the left terminal 68a). In the case of the embodiment, the length dimension L5 is slightly smaller than the length dimension L6 of the left binding site 64 connecting the left terminals 61c of the left and right tethers 61. It is set smaller (see FIG. 2) so that the region on the rear end side 70b overlaps the region on the front end 64a side of the left binding site 64 at the top and bottom, and below the left binding site 64, from the left binding site 64. Is also arranged so as to extend forward. In the case of the embodiment, the left binding site 70 has the front end 70a in front of the tip (front end 39a) of the recess of the restraint recess 39, and the airbag 15 at the time of completion of expansion is viewed from the left-right direction side. It is configured so as to be positioned in front of the most vertically wide portion (central portion) of the main body expansion portion 17 (see FIGS. 2 and 3). Further, the left binding sites 64 and 70 are formed so as to be substantially parallel to each other. Specifically, in the case of the embodiment, the left binding site 70 is arranged so that a portion having about 1/2 of the total length is overlapped with the left binding site 64 on the lower side of the left binding site 64. As described above, the regulation tether 68 constitutes the main body of the connecting portion of the connecting member 60.

The bag body 16 is formed in a bag shape by joining the peripheral edges of a base cloth having a predetermined shape to each other, and in the case of the embodiment, as shown in FIGS. 7 and 8, the left panel portion 77 and the right panel portion 81 are formed. It is composed of a front panel portion 75, a rear left panel portion 83, a rear center panel portion 87, and a rear right panel portion 90.

The front panel portion 75 is configured such that the outer shape is substantially strip-shaped with the longitudinal direction substantially along the front-rear direction. It is configured over the lower wall portion 20. In the case of the embodiment, the front panel portion 75 is configured to be asymmetrical so that the center of the left edge 75c projects to the left.

The left panel portion 77 constitutes from the left wall portion 21 of the main body expansion portion 17 to the left wall portion 30 of the protruding expansion portion 29 when the expansion is completed. Specifically, the left wall portion 21 of the main body expansion portion 17 is formed. A substantially trapezoidal protruding portion component 79 constituting the left wall portion 30 of the protruding expansion portion 29 is connected to the rear end side of the substantially triangular main body portion 78. The right panel portion 81 constitutes the right wall portion 22 of the main body expansion portion 17, and has a substantially triangular shape in which the outer shape is substantially the same as the outer shape of the main body portion 78 in the left panel portion 77.

The rear left panel portion 83 has a substantially band shape that constitutes a portion on the left edge side of the rear side wall portion 28 in the main body expansion portion 17 when expansion is completed, and also has a protruding portion configuration that constitutes the right wall portion 31 of the protruding expansion portion 29. The portion 84 and the recess portion 85 forming the left side wall 41 of the restraint recess 39 are partially projected. Specifically, the projecting portion component 84 is formed so as to project from the left edge 83c of the rear left panel portion 83 in a flatly deployed state, and the recess portion 85 projectes from the right edge 83d.

The rear central panel portion 87 constitutes a region on the left side of the receiving center 36a on the rear side wall portion 28 (front collision restraint surface 36), and is configured as a band shape substantially along the longitudinal direction in the vertical direction. There is. On the left edge 87c of the rear central panel portion 87, a recess portion 88 forming the right wall 42 of the restraint recess 39 is formed so as to partially project. The rear right panel portion 90 constitutes a region on the rear side wall portion 28 (front collision restraint surface 36) on the right side of the receiving center 36a, and is configured as a band shape substantially along the longitudinal direction in the vertical direction. ing.

In the embodiment, the left panel portion 77, the right panel portion 81, the front panel portion 75, the rear left panel portion 83, the rear center panel portion 87, the rear right panel portion 90, and the front side of the front and rear tether 45 constituting the bag main body 16 are formed. The tether base cloth 52 that constitutes the portion 46 and the recess tether 49, the rear portion 47 of the front and rear tether 45, the tether base fabrics 58L and 58R that form the left and right tether 57, and the tether base cloth 62L that constitutes the left and right tether 61. , 62R, and the regulation tether 68 are each formed of a flexible woven fabric made of polyester yarn, polyamide yarn, or the like.

Then, as shown in FIGS. 1 to 5, the bag body 16 of the embodiment has a left panel portion 77, a right panel portion 81, a front panel portion 75, a rear left panel portion 83, a rear center panel portion 87, and a rear right panel portion. The corresponding edges of the 90 are sewn (bonded) to each other using sutures to form a bag shape. Specifically, the rear upper edge 75a of the front panel portion 75 is combined with the rear left panel portion 83, the rear center panel portion 87, and the upper edges 83a, 87a, 90a of the rear right panel portion 90, and the rear lower edge 75b is , Rear left panel portion 83, rear center panel portion 87, and rear right panel portion 90 are combined with lower edges 83b, 87b, 90b. The left edge 75c of the front panel portion 75 is connected to a portion of the left panel portion 77 from the upper edge 78a to the lower edge 78b of the main body portion 78, and the right edge 75d of the front panel portion 75 is the upper edge of the right panel portion 81. It is combined with the site from 81a to the lower edge 81b. The left edge 83c of the rear left panel portion 83 is coupled to the trailing edge 78c of the main body portion 78 of the left panel portion 77. The right edge 83d of the rear left panel portion 83 is connected to the left edge 87c of the rear center panel portion 87, and at this time, the outer edges 85a and 88a of the recessed portions 85 and 88 are also connected to each other. The right edge 87d of the rear center panel portion 87 is coupled to the left edge 90c of the rear right panel portion 90. The right edge 90d of the rear right panel portion 90 is coupled to the trailing edge 81c of the right panel portion 81. The upper edge 79a, lower edge 79b, and trailing edge 79c of the protrusion component 79 in the left panel portion 77 are the upper edge 84a, lower edge 84b, and trailing edge 84c of the protrusion component 84 in the rear left panel portion 83, respectively. , Combined.

In the passenger seat airbag device M of this embodiment, the airbag 15 in a state where the retainer 9 is housed inside is folded so as to be stored in the case 12, and the periphery is wrapped in a breakable wrapping sheet (not shown). In this state, it is housed in the case 12, and the inflator 8 is connected to the case 12 together with the peripheral edge of the gas inlet 25 of the airbag 15 by using the retainer 9. After that, if the case 12 holding the folded airbag 15 and the inflator 8 is connected to an airbag cover (not shown) formed on the instrument panel 1 mounted on the vehicle, the airbag device M is mounted on the vehicle. Can be made to.

In the passenger seat airbag device M of the embodiment, the inflator 8 is activated at the time of a frontal collision, an oblique collision, or an offset collision of the vehicle while being mounted on the vehicle, and the airbag 15 is installed inside. The expansion gas is introduced to expand the case 12, and the expansion is completed as shown in FIGS. 9, 10 and 12 while protruding from the case 12.

Then, in the passenger seat airbag device M of the embodiment, when the expansion of the airbag 15 is completed, the left wall portion 30 as the separation side wall portion and the right wall portion as the main body expansion portion side wall portion inside the protruding expansion portion 29. The left and right tethers 61 as connecting members connecting the 31 and the left side binding site 64 as the separation side binding site to be coupled to the left wall portion 30 of the protruding expansion portion 29 are forward beyond the front collision restraint surface 36. It is a configuration that is arranged so as to extend to. That is, in the passenger seat airbag device M of the embodiment, the left and right tethers 61 made of a flexible seat body are substantially along the front-rear direction in the protruding expansion portion 29 of the airbag 15 when the expansion is completed. It will be arranged in a stretched state, and will be placed in the front and rear so as to enter the area of the side wall portion (left wall portion 21) of the protruding expansion portion 29 in the main body expansion portion 17 on the left wall portion 30 side of the protruding expansion portion 29. A rod-shaped left binding site 64 substantially along the direction will be disposed. Therefore, when the airbag 15 is inflated, the left and right tethers 61 are subjected to tension to exhibit plate-like rigidity, and further, the left side binding site 64 of the left and right tethers 61 has linear rigidity substantially along the front-rear direction. Because it acts like a rod-shaped reinforcing material along the front-rear direction, the left wall portion 30 near the boundary portion with the main body expanding portion 17 in the protruding expanding portion 29 to the left wall portion of the main body expanding portion 17. Bending in an area covering 21 can be prevented. As a result, when the expansion of the airbag 15 is completed, the head MH of the occupant MP that moves diagonally forward is brought into contact with the restraint surface 37 for oblique collision, and the protruding expansion portion 29 is the head of the occupant MP. Even if the protruding expansion portion 29 is pressed with a strong force when the MH is received, the left joint portion 64 is used as the front collision restraint surface 36 (the boundary portion between the protrusion expansion portion 29 and the main body expansion portion 17). The left and right tethers 61 arranged so as to extend forward beyond the above can prevent the protruding expansion portion 29 from being deformed, and the protruding expansion portion 29 has a bending point near the boundary portion with the main body expansion portion 17. Since it is possible to suppress bending away from the main body expanding portion 17 and not to cause a decrease in reaction force due to bending, the protruding expanding portion 29 can stably restrain the head MH of the occupant MP.

Therefore, in the passenger seat airbag device M of the embodiment, the head MH of the occupant MP can be stably protected by the protruding expansion portion 29.

Further, in the passenger seat airbag device M of the embodiment, the airbag 15 is restrained by allowing the head MH of the occupant MP to enter between the front collision restraint surface 36 and the oblique collision restraint surface 37. The restraining recess 39 is provided, and the restraining recess 39 is stably recessed forward by the regulation tether 68 constituting one connecting portion main body of the connecting member 60 and the recessing tether 49. Since the configuration is arranged in such a manner, the head MH of the occupant MP moving diagonally forward can smoothly enter the restraint recess 39. Therefore, in the case of an oblique collision or an offset collision of the vehicle, the head MH of the occupant MP that moves diagonally forward can be accurately protected by the oblique collision restraint surface 37 and the restraint recess 39. can. Further, in the passenger seat airbag device M of the embodiment, the regulation tether 68 as the connecting main body portion and the left and right tethers 61 partially form the left binding sites 64 and 70 as the separating side binding sites in the vertical direction. In addition to overlapping, at least one (in the case of the embodiment, both) is arranged so as to extend forward from the front collision restraint surface 36. Therefore, when the protruding expansion portion 29 receives the head MH of the occupant MP, it can be prevented from being bent away from the main body expansion portion 17 with the vicinity of the boundary portion with the main body expansion portion 17 as a bending point. The protruding expansion portion 29 can stably restrain the head MH of the occupant MP without causing a decrease in reaction force due to bending. As the airbag, like the airbag 15B shown in FIG. 15, an airbag having a structure consisting of only one left and right tether 61B without providing a regulation tether may be used as the connecting member 60B.

In particular, in the passenger seat airbag device M of the embodiment, the left binding site 64 itself in the left and right tethers 61 is also configured to extend forward of the front collision restraint surface 36, and the left and right binding sites 64 of the left and right tethers 61 The left binding site 70 of the regulation tether 68, which partially overlaps (rear end side) on the vertical side, is configured to extend further forward. Specifically, the left side provided on the regulation tether 68. The front end 70a of the binding site 70 is configured to be positioned in front of the most vertically wide portion (central portion) of the main body expansion portion 17 when the airbag 15 at the completion of expansion is viewed from the left-right direction side. Has been done. Therefore, as shown in FIG. 11, when the expansion of the airbag 15 is completed, the protrusion expansion portion 29 receives the head MH of the occupant MP moving diagonally forward, and the protrusion expansion portion 29 becomes the main body. It is possible to suppress bending with respect to the expansion portion 17, secure a sufficient reaction force by the protruding expansion portion 29, and accurately restrain the head MH of the occupant MP. The left and right tethers may be configured so that the left binding site (separation side binding site) is arranged only within the region of the protruding expansion portion. Further, in the embodiment, the left binding site 70 of the regulation tether 68 is arranged only in the region of the left wall portion 21 in the main body expansion portion 17, but as described in the airbags 15A, 15C, and 15D described later. , 70A, 70C, 70D may be arranged so as to straddle the left wall portion 21 of the main body expansion portion 17 and the left wall portion 30 of the protruding expansion portion 29.

Further, in the passenger seat airbag device M of the embodiment, in the left and right tethers 61, the right binding site 65 (main body side binding site) that connects the right terminal 61d as the main body side terminal to the right wall portion 31 side is the right wall. It is configured to be arranged so as to straddle the right side wall 42 constituting the restraint recess 39 from the portion 31. Therefore, as compared with the case where the main body side binding site is formed only in the region of the protruding expansion portion 29, the right binding site 65 can be arranged so as to extend back and forth longer, in other words, the area of the left and right tethers 61. Since it is possible to secure a wide range, it is possible to further suppress the deformation of the protruding expansion portion 29 when the occupant is received. If such a point is not taken into consideration, the left and right tethers may be configured such that the right side binding site (main body side binding site) is arranged only in the region of the right wall portion of the protruding expansion portion.

Further, in the passenger seat airbag device M of the embodiment, the protruding expansion portion 29 has a top portion on the rear end side substantially left of the center in the left-right direction of the protruding expansion portion 29 in a cross section substantially along the horizontal direction when expansion is completed. The configuration is such that the restraint surface 37 for oblique collision (right wall portion 31) is arranged so as to be inclined with respect to the front-rear direction. Therefore, the slanting restraint surface 37 can be arranged so as to substantially face the head MH of the occupant MP moving diagonally forward, so that the slanting restraint surface is substantially aligned in the front-rear direction. It is possible to accurately protect the head MH of the occupant MP as compared with the case of arranging the occupant MP. Further, when the protruding expanding portion 29 is configured such that the top portion on the rear end side is displaced from the center of the protruding expanding portion 29 in the left-right direction toward the left wall portion 30, the protruding expanding portion 29 is arranged. Although it becomes thinner toward the rear end 29b side, the connecting member 60 can suppress bending of the main body expanding portion 17 when the occupant's head is received, and stably protects the occupant MP's head MH. can do. If such a point is not taken into consideration, the protruding expansion portion of the airbag may be configured to expand the main body expansion portion side wall portion and the separation side wall portion constituting the diagonal collision restraint surface so as to be substantially parallel to each other.

Further, as in the airbag 15A shown in FIGS. 13 and 14, the two left binding sites 64A and 70A (separation side binding sites) have substantially the same length dimension on the front-rear direction side, and the vertical direction side covers substantially the entire front-rear direction. It may be configured to be arranged so as to overlap with each other. In this airbag 15A, as shown in FIG. 13, both the left and right tethers 60A and the regulation tether 68A are configured to be wide in the front-rear direction, and the left binding sites 64A and 70A are both in front of the front collision restraint surface 36. In addition to being arranged so as to extend to, the front end is in front of the most vertically wide part (center part) of the main body expansion part 17 when the airbag 15A at the time of expansion is viewed from the left-right direction side (vent). It is configured to be located in front of the hole 27). Further, as in the airbag 15C shown in FIG. 16, the left and right tethers 61C are arranged on both the upper and lower sides of the regulation tether 68C, and the connecting member 60C has three connecting members (three left binding sites 64C). , 70C, 70C are arranged side by side), and further, as in the airbag 15D shown in FIG. 17, the left and right tethers 61D are arranged one on the upper side and two on the lower side of the regulation tether 68D. , The connecting member 60D may be configured to have four connecting members (a configuration in which four left binding sites 64D, 70D, 70D, and 70D are arranged side by side). Even in these airbags 15C and 15D, the left binding sites 64C, 64D, 70C and 70D are the most up and down of the main body expansion portion 17 with the front ends of the airbags 15C and 15D viewed from the left-right direction side when expansion is completed. It is configured to be located in front of the wide part (central part). Compared with the airbag 15 of the embodiment, these airbags 15A, 15C, and 15D can further suppress bending deformation of the protruding expansion portion with respect to the main body expansion portion when the occupant's head is received.

In the embodiment, the airbag 15 is configured such that the protruding expansion portion 29 is arranged only on the driver's seat side (left side) on the rear surface (front collision restraint surface 36) side of the main body expansion portion 17. However, the protruding expansion portion may be arranged only on the right side on the rear surface side of the main body expansion portion, and further, the protrusion expansion portion may be arranged on both the left and right sides on the rear surface side of the main body expansion portion.

1 ... Instrument panel (instrument panel), 12 ... Case (storage site), 15, 15A, 15B, 15C, 15D ... Airbag, 17 ... Main body expansion part, 17a ... Front end, 28 ... Rear side wall part, 29 ... Protruding expansion Part, 30 ... Left wall part (separation side wall part), 31 ... Right wall part (main body expansion part side wall part), 36 ... Front collision restraint surface, 37 ... Oblique collision restraint surface, 39 ... Restraint recess, 41 ... Left side wall, 42 ... Right wall, 49 ... Recessed tether, 60, 60A, 60B, 50C, 60D ... Connecting member, 61, 61A, 61B, 61C, 61D ... Left and right tether (connecting part main body), 61c ... Left terminal ( Separation side terminal), 61d ... Right terminal (main body side terminal), 64, 64A, 64B, 64C, 64D ... Left side binding site (separation side binding site), 65 ... Right binding site (main body side binding site), 68, 68B , 68C ... Regulatory tether (connecting part body), 68a ... Left terminal (separation side terminal), 68b ... Right terminal, 70, 70B, 70C ... Left binding site (separation side binding site), MP ... Crew, MH ... Head , M ... Airbag device for passenger seat.

Claims (7)

It is folded and stored in the storage part provided in the instrument panel arranged in front of the passenger seated in the passenger seat, and the expansion gas flows into the inside to expand and project toward the rear of the vehicle to push the occupant. It is configured to be equipped with a protective airbag.
The airbag
A main body expansion portion in which the front end side when expansion is completed is attached to the storage portion and expands and expands so as to project rearward from the storage portion.
On the rear surface side of the main body expansion portion when the expansion is completed, a protruding expansion portion disposed so as to partially project rearward from the edge side of at least one side in the left-right direction.
Have,
The rear surface of the expansion portion of the main body when expansion is completed constitutes a front collision restraint surface capable of protecting the head of the occupant who moves forward when the vehicle front impacts.
In the protruding expansion portion, the side wall portion of the main body expansion portion arranged so as to be continuous from the front collision restraint surface when the expansion is completed moves diagonally forward at the time of an oblique collision or an offset collision of the vehicle. Consists of a restraint surface, which can protect
Inside the protruding expansion portion, a flexible sheet body is formed, and a separation side wall portion facing the main body expansion portion side wall portion side surface and the main body expansion portion side wall portion on the left-right direction side when expansion is completed. A passenger seat airbag device having a structure in which a connecting member connecting the side and the side is arranged so as to extend substantially along the front-rear direction.
The connecting member connects the main body side terminal on the main body expansion portion side to the main body expansion portion side wall portion, the separation side terminal to the separation side wall portion, and the separation side terminal to the separation side wall portion. An airbag device for a passenger seat, characterized in that the separation side binding site to be operated is extended forward from the front collision restraint surface in a state of being viewed from the left-right direction side when expansion is completed. A restraining recess for allowing the head of the occupant to enter and restrain the occupant's head is disposed between the front collision restraint surface and the oblique collision restraint surface so as to be recessed forward.
Inside the airbag, a tether for a recess, which is connected to the tip end side of the recess of the restraint recess, is disposed so as to be able to suppress the movement of the restraint recess to the rear during expansion and expansion.
The connecting member is configured by arranging at least two connecting portion main bodies composed of a flexible sheet body side by side in the vertical direction, and connects each connecting portion main body to the separation side wall portion. The separation side binding sites are arranged so as to have a region overlapping in the vertical direction and at least one of them extends forward from the front collision restraint surface, and the main body side of one of the connecting portion main bodies. It is characterized in that the terminal is coupled to the side wall portion of the main body expansion portion, and the main body side terminal in the other main body of the connecting portion is coupled to the tip end side of the recess of the restraining recess. The passenger seat airbag device according to claim 1. The second aspect of claim 2, wherein the two separation-side binding sites are arranged so as to overlap in the vertical direction over substantially the entire front-rear direction with substantially the same length dimension in the front-rear direction. Airbag device for the passenger seat. The passenger seat airbag device according to claim 2 or 3, wherein the connecting member is configured by arranging three connecting portion main bodies side by side in the vertical direction. The passenger seat airbag according to claim 2 or 3, wherein the connecting member is configured by arranging four connecting portion main bodies side by side in the vertical direction. A restraining recess for allowing the head of the occupant to enter and restrain the occupant's head is disposed between the front collision restraint surface and the oblique collision restraint surface so as to be recessed forward.
Inside the airbag, a tether for a recess, which is connected to the tip end side of the recess of the restraint recess, is disposed so as to be able to suppress the movement of the restraint recess to the rear during expansion and expansion.
The connecting member is arranged so that the main body side connecting portion for connecting the main body side terminal to the main body expanding portion side wall portion extends from the main body expanding portion side wall portion to the wall portion forming the restraining recess. The passenger seat airbag device according to claim 1. In a cross section substantially along the horizontal direction when the expansion is completed, the protrusion on the rear end side is arranged so as to be displaced from the center in the left-right direction of the protrusion expansion portion toward the separation side wall portion. The passenger seat airbag according to any one of claims 1 to 6, wherein the airbag is configured.

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