JP2020192973A - Air bag device - Google Patents

Abstract

To provide an air bag device capable of controlling the flow of gas discharged from an inflator.SOLUTION: An air bag device is an air bag device which is inflated and deployed in a cabin of a vehicle, and restrains an occupant seated on a first seat from a lateral side. The air bag device includes: a cushion 41 having a horizontal part 41d deployed in a horizontal direction of the vehicle in an inflated and deployed state, and a projection 41e deployed in an upper direction of the vehicle from a central part of the horizontal part 41d; a diffuser fixed to the inside of the cushion 41, opened in the horizontal direction of the vehicle, and closed in a lower direction of the vehicle, and closing a part or the entire part in a direction toward the projection; and an inflator 42 fixed to the first seat, arranged inside the diffuser, and injecting gas for inflation and deployment.SELECTED DRAWING: Figure 4

Description

The present invention relates to an airbag device.

Vehicles in recent years are equipped with airbags. An airbag is a safety device that operates in an emergency such as a vehicle collision, and expands and deploys with gas pressure to receive and protect occupants. There are various types of airbags depending on the installation location and application. For example, a front airbag is provided in the center of the steering wheel to protect the driver from collisions from the front and rear directions. In addition, in order to protect the occupants from side collisions or subsequent rollovers, curtain airbags that expand and expand along the side windows from near the ceiling of the wall, and side air that expands and expands from the side of the seat to the immediate side of the occupants. Bags and the like are provided. Then, some side airbags prevent the occupant seated in the driver's seat from moving to the passenger's seat side in the event of a side collision or the like (Patent Document 1).

Japanese Unexamined Patent Publication No. 2010-115947

Inside the airbag, an inflator that rapidly releases gas in the event of a collision or the like is arranged. The airbag expands and expands due to the gas released from the inflator. However, depending on the size of the vehicle, the place where the airbag is attached, and the shape of the airbag, such expansion and deployment may not sufficiently protect the occupant from impact.

In one aspect, it is intended to provide an airbag device that can adequately protect an occupant.

The airbag device is an airbag device that expands and expands in the passenger compartment of the vehicle and restrains the occupant seated in the first seat from the side, and is a horizontal portion that expands and expands in the horizontal direction of the vehicle in the expanded and deployed state. And a cushion including a protruding portion extending upward from the central portion of the horizontal portion, and the inside of the cushion, which opens in the horizontal direction of the vehicle and has a downward direction of the vehicle. It includes a diffuser that is closed and partially or wholly closed in the direction toward the protrusion, and an inflator that is fixed to a first seat and is arranged inside the diffuser to inject a gas for expansion and deployment.

In this airbag device, the gas injected from the inflator flows out to the inside of the cushion through the diffuser. By properly determining the size and shape of the diffuser opening, it is possible to prevent the protrusion from expanding too rapidly. When the entire cushion is properly deployed, the airbag device can adequately protect the occupant.

The diffuser of the airbag device opens at least in a horizontal portion of the vehicle.

The diffuser of the airbag device has a tubular shape that opens over the entire length at both ends of the vehicle in the horizontal direction and closes over the entire length in the upward and downward directions of the vehicle.

The diffuser of the airbag device has a bag shape having an opening capable of ejecting the gas injected from the inflator in the horizontal direction of the vehicle.

The diffuser of the airbag device opens over or in part over the entire length at one end of the vehicle in the horizontal direction, closes over the entire length at the other end in the horizontal direction, and closes over the entire length in the upward and downward directions of the vehicle, respectively. It is in the shape of a bag that is closed over.

In this airbag device, the cushion first deploys at high speed in the horizontal direction. Therefore, the portion from the abdomen to the chest of the seated occupant can be quickly restrained and protected.

The diffuser of the airbag device opens at three points at both ends in the upward direction and the horizontal direction of the vehicle.

In this airbag device, the cushion is deployed in a well-balanced manner in both the horizontal direction and the vertical direction. Therefore, the upper body of the seated occupant can be appropriately restrained and protected.

The cushion of the airbag device has an insertion hole through which a stud bolt for fixing the inflator to the structure in the vehicle interior is inserted.

In this airbag device, the inflator can be firmly fixed to the skeletal frame by stud bolts.

In one aspect, it is possible to provide an airbag device that can sufficiently protect an occupant.

It is a perspective view which shows the inside of the vehicle which includes the airbag device which concerns on Embodiment 1. It is a top view which shows the inside of the vehicle which includes the airbag device which concerns on Embodiment 1. It is sectional drawing of the airbag device by line III-III of FIG. It is a perspective view which shows the example of a cushion. It is explanatory drawing which shows the folding method of a cushion. It is explanatory drawing which shows the folding method of a cushion. It is explanatory drawing explaining the structure of a cushion. It is explanatory drawing explaining the joining method of the 1st panel and a rectifying sheet. It is sectional drawing by IX-IX line of FIG. 8 in the state which the inflator is arranged. FIG. 8 is a cross-sectional view taken along line XX of FIG. It is explanatory drawing which shows the development process of a cushion. It is a front view which shows the state which the cushion is expanded. It is explanatory drawing explaining the joining method of the 1st panel of Embodiment 2 and a rectifying sheet. It is explanatory drawing explaining the joining method of the 1st panel of Embodiment 3 and a rectifying sheet. It is explanatory drawing explaining the joining method of the 1st panel of Embodiment 4 and a rectifying sheet. It is explanatory drawing explaining the joining method of the 1st panel of Embodiment 5 and a rectifying sheet. It is a perspective view which shows the example of the cushion of Embodiment 6. FIG. 17 is a cross-sectional view taken along the line XVIII-XVIII of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The "up", "down", and "up and down" directions of the vehicle used in the following explanation indicate the direction on the line connecting the center of the ceiling and the center of the floor of the vehicle, and the direction toward the ceiling. Is "up" and the direction toward the floor is "down". Further, the "front", "rear", and "front-back" directions of the vehicle are such that the forward direction of the vehicle is the "front" direction and the reverse direction of the vehicle is the "rear" direction. Further, the width direction of the vehicle is a direction in which ordinary seats are arranged side by side, and is a direction orthogonal to the above-mentioned "front-back" direction. The opposite seat to the driver's seat refers to the passenger seat. The opposite seat to the passenger seat refers to the driver's seat. That is, when the seat and the seat opposite to the seat are described, if the seat is the driver's seat, the opposite seat is the passenger seat. On the other hand, if the seat is the passenger seat, the opposite seat is the driver's seat.

[Embodiment 1]
FIG. 1 is a perspective view illustrating the inside of a vehicle including the airbag device 4 according to the first embodiment. The airbag device 4 of the present embodiment is a side airbag device. FIG. 2 is a plan view illustrating the inside of the vehicle including the airbag device 4 according to the first embodiment. 1 and 2 show a first seat (driver's seat) 2 installed on the floor surface 10 of the passenger compartment 1, a second seat (passenger seat) 3 adjacent to the first seat, and a seat belt. 5 and is shown. The driver's seat 2 includes a seat portion 21 and a backrest 22 that rises upward from the rear side of the seat portion 21.

As shown in FIG. 2, the airbag device 4 according to the first embodiment is arranged inside the side surface of the backrest 22 of the driver's seat 2 installed in the passenger compartment 1 of the vehicle 100 on the passenger seat 3 side. ..

FIG. 3 is a cross-sectional view of the airbag device 4 according to lines III-III of FIG. The upper and lower parts of this figure correspond to the front and rear of the vehicle 100. The airbag device 4 includes a cushion 41 and an inflator 42 housed in the storage unit 40.

The cushion 41 is, for example, a bag made of cloth reinforced by weaving high-strength fibers such as nylon fibers, and is folded into a roll shape and stored inside the storage portion 40. The shape of the cushion 41 and how to fold it will be described later. The inflator 42 is fixed to the skeleton frame 23 of the backrest 22 by sandwiching the bottom plate of the storage portion 40 with the stud bolts 421. The skeleton frame 23 is an example of a structure provided in the vehicle interior 1. The inflator 42 is housed inside the cushion 41 so as to be able to inject a gas for expansion and deployment.

The storage portion 40 is a box body having one side opened, and is fixed to the skeleton frame 23 of the backrest 22 by a stud bolt 43 and the above-mentioned stud bolt 421. The opening of the storage portion 40 faces the passenger seat 3 side, and is covered with a cover plate 44 that is flush with the side surface of the driver seat 2. The cover plate 44 is a plate made of resin having a lower strength than the storage portion 40. A cleavage groove 45 is formed in the front portion of the cover plate 44 over the entire length in the vertical direction. When the vehicle 100 collides, the cushion 41 expands due to the action of the injection gas of the inflator 42, breaks the cleavage groove 45, and expands laterally. The cleavage groove 45 shown in FIG. 3 is formed on the outer surface of the cover plate 44, but may be formed on the inner surface of the cover plate 44.

FIG. 4 is a perspective view showing an example of the cushion 41. FIG. 4 shows the cushion 41 at the time of expansion. The cushion 41 has a horizontal portion 41d that expands in the horizontal direction of the vehicle 100, and a protruding portion 41e that expands upward from the central portion of the horizontal portion 41d.

The cushion 41 is formed by joining two panels 48, a first panel 481 and a second panel 482, which have a convex shape in a plan view, via a gusset portion having a thickness in the vehicle width direction. The gusset portion includes a first gusset portion 441 for joining the upper portion of the panel 48 and a second gusset portion 442 for joining the lower portion of the panel 48.

A rectifying sheet 49 is attached to the inner surface of the first panel 481. Details of the rectifying sheet 49 will be described later. A cylinder type (cylinder type) inflator 42 is arranged between the first panel 481 and the rectifying sheet 49. The first panel 481 and the rectifying sheet 49 form a diffuser 491 (see FIG. 9) that regulates the flow of gas injected from the inflator 42.

The first panel 481 is provided with an insertion hole 412 into which the stud bolt 421 is inserted. Although FIG. 4 shows a case where the number of insertion holes 412 is two, the number of insertion holes 412 may be one or three or more.

The inflator 42 operates in an emergency such as a collision of the vehicle 100, and injects gas into the cushion 41. The cushion 41 expands explosively due to the action of the injection gas of the inflator 42. The expansion pressure of the cushion 41 acts on the cover plate 44 with the bottom plate of the storage portion 40 as a support. The cushion 41 breaks the cleavage groove 45 and expands and expands to the outside of the storage portion 40. Hereinafter, expansion expansion is also simply referred to as expansion.

In the following description, the horizontal portion 41d of the cushion 41 is conceptually composed of three parts. With the position where the inflator 42 is arranged as a boundary, the portion that expands and expands mainly on the first seat (driver's seat) is the direction of the first portion 41a and the direction of the second seat (passenger seat) opposite to the inflator 42. The lower portion of the protruding portion 41e that extends toward and mainly projects upward is referred to as the second portion 41b, and the portion extending from the second portion 41b toward the second seat (passenger seat) is referred to as the third portion 41c. .. The first part 41a, the second part 41b and the third part 41c are conceptual divisions. The boundary between the first portion 41a and the second portion 41b and the boundary between the second portion 41b and the third portion 41c are not strict.

5 and 6 are explanatory views showing a folding method of the cushion 41. FIG. 5 shows a method of folding the cushion 41 into a flat plate. As shown in FIG. 5, the convex portion of the convex protrusion 41e is folded inside the cushion 41. Alternatively, it may be folded in the front and back directions of the paper. Fold the bottom portion of the cushion 41 inward in the same manner as the convex portion, or fold it in the front and back directions of the paper surface. The cushion 41 changes from the state of FIG. 5A to the state of FIG. 5B.

FIG. 6 shows how to fold the cushion 41 for storing it. In FIG. 6, the rectifying sheet 49 is not shown. FIG. 6 is a plan view of the cushion 41 folded into a flat plate as viewed from above in an upright state. As described above, the inflator 42 is housed between the first panel 481 and the rectifying sheet 49. As shown in FIG. 6B, the first portion 41a of the cushion 41 is folded into a roll shape. Fold it clockwise when viewed from above. Hereinafter, such a folding method is referred to as "clockwise roll folding". As shown in FIG. 6C, the second portion 41b is folded back from the rear side to the front side. The left side of the folded first portion 41a is covered by the second portion 41b. As shown in FIG. 6D, the third portion 41c is folded into a roll shape. Fold it counterclockwise. Hereinafter, such a folding method is referred to as "counterclockwise roll folding". As shown in FIG. 6D, in the folded cushion 41, the first portion 41a is sandwiched between the third portion 41c and the inflator 42. As shown in FIG. 3, the folded cushion 41 is housed in the side surface of the backrest 22 of the seat so that the third portion 41c is in front of the vehicle and the inflator 42 is in the rear of the vehicle. The cushion 41 is fixed to the storage portion 40 by the stud bolts 421 provided on the inflator 42. Further, the cushion 41 and the storage portion 40 are covered with the cover plate 44.

FIG. 7 is an explanatory diagram illustrating the configuration of the cushion 41. In FIG. 7, the first panel 481, the second panel 482, the rectifying sheet 49, the first gusset portion 441, and the second gusset portion 442 before coupling are shown simplified from the surface side of the cushion 41, respectively.

The first panel 481 includes a substantially rectangular horizontal forming portion 46 and a substantially rectangular protruding forming portion 47 projecting from the central portion of the long side of the horizontally forming portion 46. The first panel 481 is provided with two insertion holes 412 arranged in the short side direction of the horizontal forming portion 46. The rectifying sheet 49 is rectangular. The second panel 482 has a shape in which the first panel 481 is turned inside out. The first gusset portion 441 and the second gusset portion 442 have an oval shape.

The rectifying sheet 49 is attached to the back surface of the first panel 481 as described later. The short sides of the horizontal forming portion 46 are joined to the corresponding sides of the second panel 482, respectively. The long side of the horizontal forming portion 46, the edge of the protruding forming portion 47 continuous thereto, and the corresponding side of the second panel 482 are joined to the first gusset portion 441. One long side of the horizontal forming portion 46 and the corresponding side of the second panel 482 are joined to the second gusset portion 442. As described above, the first panel 481, the second panel 482, the first gusset portion 441, and the second gusset portion 442 are joined in a bag shape. For each joining, any joining method such as stitching, bonding or welding can be used.

The configuration of the cushion 41 described with reference to FIG. 7 is an example. The plurality of members shown in FIG. 7 may be continuously formed as one member. One member shown in FIG. 7 may be divided into a plurality of members. The shape of the first panel 481 and the shape of the second panel 482 may be different.

FIG. 8 is an explanatory diagram illustrating a method of joining the first panel 481 and the rectifying sheet 49. FIG. 8 is a view of the first panel 481 as viewed from the inside. A rectifying sheet 49 is superposed on the horizontal forming portion 46 with the sides aligned. The thick broken line at the edge of the straightening sheet 49 means a portion where the straightening sheet 49 is fixed to the first panel 481 by using an arbitrary fixing means such as stitching. The rectifying sheet 49 is fixed to the first panel 481 along two sides parallel to the long side of the horizontal forming portion 46.

An inflator 42 indicated by a chain double-dashed line is arranged between the first panel 481 and the rectifying sheet 49. FIG. 9 is a cross-sectional view taken along the line IX-IX of FIG. 8 showing the diffuser 491 and the inflator 42 arranged. The inflator 42 is sandwiched between the first panel 481 and the rectifying sheet 49. FIG. 10 is a cross-sectional view taken along the line XX of FIG. The straightening sheet 49 is fixed to the first panel 481 at the edge.

As described above, the rectifying sheet 49 and the first panel 481 form a diffuser 491 inside the cushion 41. The diffuser 491 of the present embodiment has a tubular shape that opens over the entire length at both ends in the horizontal direction of the vehicle 100 and closes over the entire length in the upward and downward directions of the vehicle 100, respectively. The diffuser 491 of the present embodiment closes between the protrusion 41e of the cushion 41 and the inflator 42.

The thick arrow in FIG. 8 indicates the flow of gas flowing out of the diffuser 491. The diffuser 491 is open at both ends in the left-right direction over the entire length in the up-down direction. The gas flowing out from the diffuser 491 fills the entire inside of the cushion 41 including the space between the diffuser 491 and the second panel 482. That is, the cushion 41 is deployed by the gas flowing out from the diffuser 491.

FIG. 11 is an explanatory diagram showing a deployment process of the cushion 41. FIG. 11 is a view seen from above of the passenger compartment 1. FIG. 11A shows a state before deployment. FIG. 11B shows a state after the start of deployment. After the start of unfolding, the first portion 41a is a clockwise roll fold when viewed from above the passenger compartment 1, so that the third portion 41c is pushed forward to the left while unfolding. The force generated by the first portion 41a is a force that directs the third portion 41c toward the passenger seat three directions. Since the third portion 41c is a roll fold counterclockwise when viewed from above the passenger compartment 1, it is tilted in the passenger seat three directions by the force unfolding from the folded state together with the force of the first portion 41a. Unfold while. On the other hand, the second portion 41b is the force of the deploying operation by the gas from the inflator 42, and deploys while tilting in the passenger seat three directions, that is, to the left. On the other hand, since the first portion 41a is a clockwise roll fold, the first portion 41a is unfolded while being tilted to the right of the passenger compartment 1 by the unfolding force from the folded state. Therefore, as shown in FIG. 11B, the state of the cushion 41 is V-shaped in a plan view.

FIG. 11C shows a state in which the cushion 41 is deployed. FIG. 12 is a front view showing a state in which the cushion 41 is deployed. FIG. 12 is a view seen from the front of the passenger compartment 1. As shown in FIGS. 11C and 12, in the cushion 41 in the unfolded state, the third portion 41c is in a state of riding on the passenger seat 3. Therefore, it is possible to prevent the occupant seated in the driver's seat 2 from moving to the passenger's seat 3. In addition, the restraint position of the cushion 41 is fixed, and the reaction force from the passenger seat 3 can be used to alleviate the impact force of the collision received by the occupant.

As shown by the broken line in FIG. 12, in the rectifying seat 49, one end 492 in the horizontal direction is arranged on the driver's seat 2 with the cushion 41 deployed, and the other end 493 reaches the passenger seat 3. Has a possible horizontal length. Therefore, the opening of the diffuser 491 formed at the horizontal end of the rectifying sheet 49 also reaches the passenger seat 3 when the cushion 41 is deployed.

According to the present embodiment, in the process of deploying the cushion 41, the gas released from the inflator 42 passes through the portion where the rectifying sheet 49 is not fixed to the first panel 481. The direct direction of the gas released from the inflator 42 toward the protrusion 41e of the cushion 41 is blocked by the diffuser 491.

Therefore, the deployment of the portion of the vehicle 100 protruding upward is slightly delayed as compared with the deployment of the passenger seat in the three directions. Therefore, even if the occupant seated in the passenger seat 3 is in OOP (Out Of Position), the occupant's head is injured by strongly interfering with the cushion 41 in the process of deployment. You can prevent it from being received. This makes it possible to provide the airbag device 4 that shows good results in a so-called OOP test that evaluates the degree of protection of an occupant in a non-regular sitting posture.

The cushion 41 first deploys at high speed in the horizontal direction by the gas released from the inflator 42. Therefore, the portion from the abdomen to the chest of the occupant seated in the driver's seat 2 or the passenger seat 3 can be quickly restrained and protected.

According to the present embodiment, since the rectifying sheet 49 is fixed to the first panel 481 over the entire lengths of both long sides, the rectifying sheet 49 does not shift when the cushion 41 is folded. Therefore, it is possible to provide an airbag device 4 in which the cushion 41 can be easily folded into a predetermined shape.

According to this embodiment, the gas radiated from the inflator 42 is rectified by the diffuser 491 to deploy the cushion 41. Except for the portion forming the inner surface of the diffuser 491, it is not directly hit by the gas radiated from the inflator 42. Therefore, it is possible to provide the airbag device 4 having high resistance to the cushion 41, that is, the cushion 41 is less likely to be damaged by the gas radiated from the inflator 42.

The folding method of the cushion 41 described with reference to FIG. 6 is an example. One or both of the first portion 41a and the third portion 41c may be folded in a bellows shape, so-called bellows folding. One or both of the first portion 41a and the third portion 41c may be wound in the direction opposite to that in FIG.

Selection of the folding method of the cushion 41, the length of the first portion 41a, the second portion 41b, and the third portion 41c of the cushion 41 (the length in the front-rear direction shown in FIG. 4), and which is the ratio of each length. Whether to do so is appropriately designed for each vehicle. The height of the horizontal portion 41d, the height of the protruding portion 41e, the position of the protruding portion 41e, and the length of the protruding portion 41e in the horizontal direction are also appropriately designed for each vehicle. In addition, how high the airbag device 4 is installed from the floor surface 10 is also a matter to be appropriately designed for each vehicle.

Although the form in which the airbag device 4 is installed in the driver's seat 2 is shown, it may be installed in the passenger seat 3. In this case, the airbag device 4 installed in the driver's seat 2 and the airbag device 4 installed in the passenger seat 3 have a mirror image symmetrical structure with each other. In the first embodiment, the airbag device 4 has been described as being housed in the storage part 40, but the airbag device 4 may be directly attached and fixed to the skeleton frame 23 of the backrest 22 without the storage part. .. In that case, a split portion may be provided in the seat pad portion of the backrest 22, and the expanding cushion 41 may be deployed so as to push away the seat pad.

[Embodiment 2]
The present embodiment relates to an airbag device 4 in which a rectifying sheet 49 is fixed to the first panel 481 on three sides. The description of the parts common to the first embodiment will be omitted.

FIG. 13 is an explanatory diagram illustrating a method of joining the first panel 481 of the second embodiment and the rectifying sheet 49. The rectifying sheet 49 is fixed to the first panel 481 along a total of three sides, two sides parallel to the long side of the horizontal forming portion 46 and one side close to the short side of the horizontal forming portion 46. That is, the rectifying sheet 49 and the first panel 481 open at one end of the vehicle 100 in the vertical direction over the entire length in the vertical direction, and close at the other end in the horizontal direction over the entire length in the vertical direction, and above the vehicle 100. In the directional direction and the downward direction, a bag-shaped diffuser 491 that is closed over the entire length is formed.

According to the present embodiment, in the process of deploying the cushion 41, the direct direction of the gas released from the inflator 42 toward the protrusion 41e of the cushion 41 is hindered by the diffuser 491.

According to the present embodiment, in the process of deploying the cushion 41, the passenger seat 3 side is deployed first by the gas released from the inflator 42. With the portion of the cushion 41 on the passenger seat 3 side in contact with the occupant and the seat, the driver seat 2 side and the upper portion are deployed. By deploying the passenger seat side, which is relatively far from the airbag device 4, first, it is possible to promptly protect the occupant seated in the passenger seat 3 and appropriately protect the occupant seated in the driver seat 2. The device 4 can be provided.

The straightening sheet 49 may be fixed to the first panel 481 along a total of three sides, two sides parallel to the long side of the horizontal forming portion 46 and one side away from the short side of the horizontal forming portion 46. .. In this case, in the process of deploying the cushion 41, the driver's seat 2 side is deployed first due to the gas released from the inflator 42. With the portion of the cushion 41 on the driver's seat side in contact with the occupant and the seat, the passenger's seat 3 side and the upper portion are deployed. This makes it possible to provide the airbag device 4 having reproducibility in the deployed state of the cushion 41 on the driver's seat 2 side regardless of the presence or absence of an occupant seated in the passenger seat 3.

[Embodiment 3]
The present embodiment relates to an airbag device 4 in which a rectifying sheet 49 is fixed to the first panel 481 with two upper and lower sides and a part of the remaining one side. The description of the parts common to the first embodiment will be omitted.

FIG. 14 is an explanatory diagram illustrating a method of joining the first panel 481 of the third embodiment and the rectifying sheet 49. The rectifying sheet 49 is fixed to the first panel 481 along two sides parallel to the long side of the horizontal forming portion 46 and an upper portion of one side close to the short side of the horizontal forming portion 46. That is, in the present embodiment, the diffuser 491 having two horizontal openings at which the gas injected from the inflator 42 can be ejected in the horizontal direction of the vehicle 100 is formed.

That is, in the diffuser 491 of the present embodiment, a part in the vertical direction is opened at one end in the horizontal direction (the end on the driver's seat 2 side) of the vehicle 100, and a part in the vertical direction is opened at the other end in the horizontal direction (the end on the passenger seat 3 side). At the end), it opens over the entire length in the vertical direction, and closes over the entire length in the upward and downward directions of the vehicle 100, respectively.

According to the present embodiment, in the process of deploying the cushion 41, the lower side of the passenger seat 3 side and the driver seat 2 side is first deployed by the gas released from the inflator 42. This makes it possible to provide the airbag device 4 that can intensively protect the abdomen of the occupant seated in the driver's seat 2 from the initial stage of deployment. At the same time, protection of the occupant seated in the passenger seat 3 can be started at an early stage.

The straightening sheet 49 may be fixed to the first panel 481 along two sides parallel to the long side of the horizontal forming portion 46 and an upper portion of one side away from the short side of the horizontal forming portion 46. The rectifying sheet 49 may be fixed to the first panel 481 along two sides parallel to the long side of the horizontal forming portion 46 and the lower part of one side close to the short side of the horizontal forming portion 46. Even if the rectifying sheet 49 is fixed to the first panel 481 along two sides parallel to the long side of the horizontal forming portion 46 and a portion other than the central portion of one side away from the short side of the horizontal forming portion 46. good.

[Embodiment 4]
The present embodiment relates to an airbag device 4 having a polygonal (in this case, hexagonal) rectifying sheet 49. The description of the parts common to the first embodiment will be omitted. FIG. 15 is an explanatory diagram illustrating a method of joining the first panel 481 of the fourth embodiment and the rectifying sheet 49. The rectifying sheet 49 is fixed to the first panel 481 along two hypotenuses and one side not adjacent to the hypotenuse.

That is, in the present embodiment, diffusers 491 having openings capable of ejecting the gas injected from the inflator 42 are formed at a total of three locations at both ends of the vehicle 100 in the upward and horizontal directions. That is, the gas injected from the inflator 42 flows out from the diffuser 491 in three directions.

According to the present embodiment, in the process of deploying the cushion 41, the portion of the portion of the vehicle 100 protruding upward and close to the driver's seat 2 is deployed first, and then the passenger seat 3 is seated. Deploy toward the head of the occupant. Therefore, the cushion 41 in the middle of deployment can protect the head of the occupant in the driver's seat 2 from the initial stage of deployment, and can protect the head of the occupant seated in the passenger seat 3 at an early stage. Become.

[Embodiment 5]
The present embodiment relates to an airbag device 4 in which a rectifying sheet 49 is fixed to the first panel 481 on two upper and lower sides and has an opening portion on a part of the upper side. The description of the parts common to the first embodiment will be omitted.

FIG. 16 is an explanatory diagram illustrating a method of joining the first panel 481 of the fifth embodiment and the rectifying sheet 49. Of the two sides parallel to the long side of the horizontal forming portion 46, the side close to the protruding forming portion 47, that is, the upper side of the rectifying sheet 49 is fixed to the first panel 481 except for a part. The other side, that is, the lower side, is fixed to the first panel 481 over the entire length. A part of the long side on the protrusion forming portion 47 side is open. That is, in the present embodiment, the diffuser 491 is opened at both ends in the horizontal direction of the vehicle 100 over the entire length, is partially opened at both ends of the vehicle 100 in the upward direction and the rest is closed, and is closed over the entire length in the downward direction. Is formed.

According to the present embodiment, in the process of deploying the cushion 41, a part of the gas released from the inflator 42 rapidly deploys the protrusion 41e. By appropriately selecting the length of the opening on the upper side of the straightening sheet 49, the deployment speed of the protruding portion 41e can be appropriately set. This makes it possible to provide an airbag device 4 capable of appropriately protecting the upper body and head of an occupant seated in the driver's seat 2 or the passenger seat 3.

[Embodiment 6]
The present embodiment relates to an airbag device 4 that uses an independent tubular diffuser 494 in the cushion instead of the rectifying sheet 49. The description of the parts common to the first embodiment will be omitted.

FIG. 17 is a perspective view showing an example of the cushion 41 of the sixth embodiment. FIG. 18 is a cross-sectional view taken along the line XVIII-XVIII of FIG. The directions shown in FIGS. 17 and 18 indicate the directions in the vehicle 100.

17 and 18 show the cushion 41 when unfolded. Inside the cushion 41, an independent tubular diffuser 494 is arranged with the opening facing the front-rear direction. An inflator 42 is arranged inside the diffuser 494. Two stud bolts 421 extending from the inflator 42 penetrate the hole provided in the diffuser 494 and the insertion hole 412 provided in the cushion 41, and protrude from the cushion 41.

The diffuser 494 is fixed in place by stud bolts 421. On the anterior and posterior sides of the inflator 42, the diffuser 494 is not fixed to any other member.

According to the present embodiment, it is possible to provide an airbag device 4 in which the diffuser 494 can be deformed, for example, as shown by the alternate long and short dash line in FIG. 18 in the process of deploying the cushion 41. When the airbag is inflated and unfolded, the gas injected from the inflator 42 is injected in an oblique direction in the process of unfolding the cushion 41. Therefore, for example, the occupant seated in the passenger seat 3 is slightly leaning forward. An airbag device 4 that can be protected even in the case can be provided.

According to the present embodiment, since it is not necessary to sew the diffuser 494 and the first panel 481 together by means such as adhesion or welding, it is possible to provide an airbag device 4 that is easy to assemble.

The technical features (constituent requirements) described in each embodiment can be combined with each other, and by combining them, new technical features can be formed. For example, in the sixth embodiment, the diffuser 494 has the same horizontal length as the rectifying sheet 49 according to the first embodiment so that the horizontal end of the diffuser 494 can reach the passenger seat 3 in the unfolded state. Has. Therefore, the opening formed at the horizontal end of the diffuser 494 also reaches the passenger seat 3 when the cushion 41 is deployed. The same applies to the rectifying sheet 49 according to the second to fifth embodiments.
The embodiments disclosed this time should be considered to be exemplary in all respects and not restrictive. The scope of the present invention is indicated by the scope of claims, not the above-mentioned meaning, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

100 Vehicle 1 Car room 10 Floor 2 Driver's seat 21 Seat 22 Backrest 23 Skeletal frame 3 Passenger seat 4 Airbag device 40 Storage 41 Cushion 41a 1st part 41b 2nd part 41c 3rd part 41d Horizontal part 41e Protruding part 412 Insertion hole 42 Inflator 421 Stud bolt 43 Stud bolt 44 Cover plate 441 1st gusset part 442 2nd gusset part 45 Cleavage groove 46 Horizontal forming part 47 Protruding part 48 Panel 481 1st panel 482 2nd panel 49 Rectifying sheet 491 Diffuser 492 One end 493 The other end 494 Independent tubular diffuser (diffuser)
5 seat belt

Claims (9)

It is an airbag device that expands and expands in the passenger compartment of a vehicle and restrains the occupant seated in the first seat from the side.
A cushion including a horizontal portion that expands in the horizontal direction of the vehicle in an expanded and expanded state, and a protruding portion that expands upward from the central portion of the horizontal portion.
A diffuser that is fixed inside the cushion, opens in the horizontal direction of the vehicle, closes in the downward direction of the vehicle, and partially or completely closes in the direction toward the protrusion.
An airbag device provided with an inflator that injects a gas for expansion and deployment, which is fixed to a first seat and arranged inside the diffuser. The airbag device according to claim 1, wherein the diffuser is opened at least in a part of the vehicle in the horizontal direction. The airbag device according to claim 1, wherein the diffuser has a tubular shape that opens over the entire length in the vertical direction at both ends in the horizontal direction of the vehicle and closes over the entire length in the upward and downward directions of the vehicle. The airbag device according to claim 1, wherein the diffuser has a bag shape having an opening capable of ejecting gas injected from the inflator in the horizontal direction of the vehicle. The diffuser opens over or at one end in the vertical direction at one end of the vehicle, closes over the entire length in the vertical direction at the other end in the horizontal direction, and closes over the entire length in the vertical direction of the vehicle. The airbag device according to claim 4, each having a bag shape closed over the entire length. The airbag device according to claim 1, wherein the diffuser opens at three locations at both ends in the upward direction and the horizontal direction of the vehicle. With the cushion unfolded, the diffuser has one end in the horizontal direction placed on the first seat and the other end in the horizontal direction on the second seat adjacent to the first seat. The airbag device according to any one of claims 1 to 6, which has a reachable horizontal length. The airbag device according to claim 7, wherein the first seat is a driver's seat and the second seat is a passenger seat. The airbag device according to any one of claims 1 to 8, wherein the cushion has an insertion hole through which a stud bolt for fixing the inflator to the structure in the vehicle interior is inserted.

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