JP2597723Y2 - Airbag device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag device, and more particularly to an airbag device having an airbag module installed above a seat back.

[0002]

2. Description of the Related Art As is known, for example, in Japanese Utility Model Laid-Open Publication No. 50-49833, an airbag module is installed on an upper portion of a seat back, and the airbag is deployed rearward from there. 2. Description of the Related Art An airbag device for protecting a rear passenger is known.

[0003]

However, even in the case of this type of airbag device, the airbag device is employed in an actual vehicle similarly to a general airbag device for a front occupant installed on a steering or the like. There are several technical requirements that must be taken into account when doing so.

For example, as in the case of a general airbag device for protecting a front seat occupant, even in this type of airbag device installed in a seat back, an occupant's head is used by using an airbag. It is preferable to take some knee protector measures that can protect the knees of the occupant at the same time as protecting the parts and the chest (first request).

[0005] Further, since the airbag module in this type of airbag device is directly fixed to the seat frame constituting the skeleton of the seat back, all the impact force from the airbag at the time of a vehicle collision is received by the seat frame. As a matter of course, it is preferable to take some measures for absorbing the impact force other than the seat frame in order to protect the occupant and the seat frame (second requirement).

Further, in the case of this type of airbag device,
When the seat back is reclined rearward, the direction of the airbag module changes and the deployment direction of the airbag changes, so the seatback itself needs to have a structure that cannot perform the reclining operation. Therefore, since it is very inconvenient for the occupant, it is preferable that the seat back in which the airbag module is installed can recline rearward without impairing the airbag performance (third request).

The present invention has been made by paying attention to such a conventional technique, and provides an airbag apparatus which can meet various technical requirements as described above.

[0008]

An airbag device according to the invention according to the first aspect of the present invention has the following features.
A tilting member attached to the rear portion of the seat back so as to be tiltable rearward about a lower fulcrum, and an inflator mounted on the upper portion of the seat frame of the seat back extends beyond the tilting member beyond the upper portion of the tilting member. An airbag module having an airbag to be obtained, and transmitting the deploying force of the airbag to the upper portion of the tilting member, and inviting the deploying airbag downward by tilting the tilting member backward,
The vehicle includes a connecting means for connecting an upper portion of the tilting member and a portion adjacent to the lower side of the airbag to the inflator, and a link mechanism for restricting the tilting member in the rearward tilting state from tilting forward.

In order to meet the second requirement, the airbag device according to the second aspect of the present invention has a surface serving as an impact force input surface and an upper end portion rotatably attached to an upper side portion of the seat frame. Between the supporting surface, the first shock absorbing member having a structure provided with a bending deformation portion, an airbag module attached to the surface of the first shock absorbing member so that the airbag can be deployed rearward, A second flexibly deformable shock absorbing member interposed between the lower end of the support surface of the first shock absorbing member and the seat frame, one end of which is rotatably mounted on the seat frame and the other end of which is rotatably mounted on the seat frame; An auxiliary frame which is rotatably attached to a lower end portion of the support surface of the shock absorbing member, has a bendable connection fulcrum in the middle thereof, and has a slidable cylindrical portion externally provided at the connection fulcrum; Tubular part and first impact And a coupling member having both ends mounted for each rotation on the surface of the yield member, in which are provided.

In order to meet the second requirement, the airbag device according to the third aspect of the present invention has a surface serving as an impact force input surface and an upper end portion rotatably attached to an upper side portion of the seat frame. Between the supporting surface, the first shock absorbing member having a structure provided with a bending deformation portion, an airbag module attached to the surface of the first shock absorbing member so that the airbag can be deployed rearward, A second deformable shock absorbing member interposed between the lower end of the support surface of the first shock absorbing member and the seat frame, one end of which is rotatably mounted on the support surface and the other end of which is folded back Auxiliary frame that is rotatably mounted on the surface of the first shock absorbing member and has a bendable connection fulcrum in the middle of the folded portion, and a slidable cylindrical portion is externally provided at the connection fulcrum. And the auxiliary frame cylindrical And a connecting member which both ends to the seat frame is mounted for each rotation, in which are provided.

According to a fourth aspect of the present invention, there is provided an airbag device, wherein the airbag module is mounted so as to swing back and forth around a lower end mounting point so as to meet the third requirement. And a sub-frame which is attached behind the seat frame so as to be able to swing back and forth around another lower end attachment point and which is lower in height than the seat frame, is provided inside the seat back. The upper part of the airbag module in the rearward state is vertically rotatably mounted at the upper mounting point of the seat frame, and the lower part of the airbag module in the rearward state is vertically rotated at the upper mounting point of the subframe. The airbag module is movably mounted between the upper mounting point of the seat frame and the upper mounting point of the subframe. Yuru is to be located.

[0012]

In the airbag device according to the first aspect of the present invention, when the airbag is deployed from the airbag module beyond the upper portion of the tilting member to the rear of the tilting member,
Since the portion near the inflator on the lower side of the airbag and the upper part of the tilting member are connected by the connecting means, the upper part of the tilting member is pulled backward by the airbag via the connecting means. Therefore, the tilting member tilts backward about the lower fulcrum. In addition, since the airbag is pulled downward by the tilting member via the connecting member, it is possible to prevent the deploying airbag from escaping upward and to more reliably receive the rear-seat occupant falling forward. it can. In addition, since the connecting member connects the portion adjacent to the inflator on the lower side of the airbag,
Free deployment of the airbag is not hindered. Then, since the tilting member in the rearward tilting state is regulated by the link mechanism, the rearward tilting state of the tilting member is maintained as it is. Therefore, the tilting member in the rearward tilting state can be used as a knee protector, and the knee of the occupant can be protected by the tilting member.

According to the airbag device according to the present invention, the impact force applied to the airbag is transmitted to one of the two shock absorbing members and is absorbed there. When the impact force from the airbag is transmitted to the one impact absorbing member, the regulation of the connection fulcrum of the auxiliary frame is released, and the impact force from the airbag is transmitted to the other impact absorbing member. Therefore, the impact force is absorbed there as well. Therefore, the impact force applied to the airbag is
After being absorbed by the second shock absorbing member, the power is transmitted to the seat frame, so that the protection performance of the rear seat occupant by the airbag is improved and the seat frame itself is protected. Further, one of the first shock absorbing member or the second shock absorbing member is deformed first to absorb a part of the impact force, and after the restriction of the connecting member is released, the other is deformed to remove the rest of the impact force. As a result, it is possible to more reliably absorb the impact force than when both are deformed by receiving the impact force at the same time.
In addition, since the first shock absorbing member rotates about the upper end, the airbag faces downward, thereby preventing the deploying airbag from escaping upward and preventing the rear seat occupant from falling forward. It can be received more reliably.

According to the airbag device of the present invention, since the seat frame, the subframe and the airbag module constitute a kind of a four-bar linkage, the seatback is tilted rearward and the four-bar linkage is formed. If the joint link mechanism is swung rearward and deformed, the orientation of the airbag module attached between the seat frame and the upper end attachment point of the subframe changes from the rearward state to the upwardly inclined state. In this manner, at the reclining angle at which the position of the airbag module is lowered, the airbag module is inclined upward, so that even if the seat back is inclined backward, the head and chest of the rear occupant can be securely secured. Can be protected. Further, since the airbag module is vertically rotatably attached to both the upper end attachment points of the seat frame and the subframe, the orientation of the airbag module is maintained even when the reclining angle of the seatback is changed. The seat frame and the sub-frame themselves do not break from the middle position only by changing at the upper ends of the frame and the sub-frame. Therefore, the back sensation of the occupant sitting on the seat on which the airbag module is mounted is not adversely affected.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. There are first to sixth embodiments, of which the first to third embodiments relate to the invention described in claim 1, and the fourth embodiment relates to the invention described in claim 2, and the fifth embodiment relates to the fifth embodiment. The embodiment relates to the invention of claim 3, and the sixth embodiment relates to the invention of claim 4.

First Embodiment (See FIGS. 1 to 4) A seat frame 102 made of a metal pipe and having a gate shape is arranged inside a seat back 101, and the seat frame 102 is provided above the seat frame 102. Top side 1
An auxiliary frame 103 parallel to 02a is mounted. The airbag module M is fixed to the upper side portion 102a of the seat frame 102 and the auxiliary frame 103.

A support panel 104 is joined to an upper portion of the seat frame 102.
A deployment cover 105 that covers the airbag module M is attached to the upper edge of the fourth. Reference numeral 106 denotes a headrest.

As shown in FIG. 2, a base plate 108 is attached to the module cover 107 to seal the internal space of the airbag module M, and the airbag E is stored in the internal space in a folded state. Is fixed to the inflator I. The airbag E has a bag shape so as to introduce gas into the airbag and inflates the airbag E, and the inlet 109 is fixed around the injection port 110 of the inflator I via a retainer R. A slit 111 is formed at one corner of the module cover 107, and a resin plate 112 is inserted into the slit 111. The plate 112 is provided with a stopper 112a for engaging with the inner surface of the module cover 107, and the plate 112
A front end portion of the airbag 12 is connected to a part of the airbag E stored in a folded state via a cloth piece 113. Specifically, in order not to hinder the deployability of the airbag E,
A piece of cloth 113 is connected to a portion of the lower side of the airbag E close to the inflator I in a deployed state.

The rear end of the plate 112 is connected to the upper part of a garnish G serving as a "tilting member" provided at the rear of the seat back 101 via a connecting piece 114. The connecting means is constituted by the plate 112, the cloth piece 113, and the connecting piece 114.

The lower end of the garnish G is connected to a support 115 welded to the lower portion of the seat frame 102.
It is attached via a rotatable lower fulcrum α so that the entire garnish G can be tilted rearward about the lower fulcrum α.

The links 11 are provided at substantially the center of the inner surface of the garnish G on both left and right sides via pivot points β.
6 is attached to one end. At the other end of the link 116, an inward bent portion 116a is formed, and the bent portion 116a is vertically movably inserted into the inclined guide hole 118 of the guide bracket 117 fixed to the seat frame 102. ing. The guide hole 118 has a lower side slightly inclined rearward, and an engagement portion 118a which is notched forward is provided at a lower end thereof. The “link mechanism” according to this embodiment includes the link 1
16 and a guide bracket 117.

Next, the operation of the airbag device will be described. When a vehicle collision occurs, first, a sensor (not shown) senses the fact, and ignites a gas generating agent provided in the inflator I.
From 0, a large amount of gas is injected and supplied into the airbag E.
Then, the airbag E pushes down the module cover 107 and pushes up the deployment cover 105 to deploy in the direction of the rear seat occupant H behind. At this time, a part of the airbag E and the upper part of the garnish G are
13 and the plate 112 and the like,
As the airbag E deploys rearward, these cloth pieces 113 and the plate 112 pull the upper part of the garnish G rearward.

Then, the entire garnish G starts to tilt rearward around the lower fulcrum α, and the bent portion 116a of the link 116 responds to the tilt of the garnish G rearward.
Moves down in the guide hole 118. When the bent portion 116a of the link 116 descends to the lower end of the guide hole 118, the airbag E has also been fully inflated beyond the upper part of the garnish G and rearward from the garnish G. The head and chest of the rear-seat occupant H falling forward can be received by the airbag E that has become inactive. At the same time, since the garnish G is tilted rearward, the knee 119 of the rear passenger H can be received by the garnish G. When the knee portion 119 hits the garnish G, the link 116 is pushed forward and the bent portion 116a enters into the engagement portion 118a and is locked there. Therefore, the tilting state of the garnish G is maintained, and the knee protector is used as a knee protector. The portion 119 can be protected.

In the above operation, when the airbag E is deployed rearward, the upper part of the garnish G is pulled rearward via the cloth piece 113 or the plate 112. Part of the airbag E is a piece of cloth 1
Since the airbag E is connected to the upper part of the garnish G by the plate 13 and the plate 112, the airbag E is pulled downward by the cloth pieces 113 and the plate 112 during the deployment of the airbag E. It can be prevented beforehand. Therefore, the rear seat occupant H falling forward can be more reliably received by the airbag E, and the protection performance of the rear seat occupant H is improved.

Second Embodiment (See FIG. 5) This embodiment is a modification of the link mechanism for maintaining the garnish G in the tilted state, and the same parts as those in the first embodiment are denoted by the same reference numerals. , Overlapping description will be omitted. The guide hole 202 of the guide bracket 201 according to this embodiment does not have an engaging portion formed at the lower end. Instead, another lock link 204 is provided on the link 203 via the rotation fulcrum β so that the garnish G It is attached to the inner surface. The tip of the lock link 204 has a flat plate shape like the tip of a flathead screwdriver, and slides back and forth on the link 203. A groove 205 is formed on the upper surface of the intermediate portion of the link 203 so that the tip of the lock link 204 can engage with the groove.

Accordingly, when the garnish G is tilted rearward by being pulled by the airbag E, the bent portion 203a of the link 203 descends in the guide hole 202, and the tip of the lock link 204 turns the upper surface of the link 203 rearward. After sliding, it enters into the groove 205 to be engaged. Therefore, the rearward tilting state of the garnish G is maintained by the link 203 and the lock link 204 in the engaged state, so that the garnish G can be used as a knee protector as in the previous embodiment.

Third Embodiment (See FIG. 6) This embodiment shows still another modification of the link mechanism for maintaining the garnish G in a tilted state, and the same parts as those in the first embodiment have the same reference numerals. , And redundant description is omitted. A guide hole is not provided in the guide bracket 301 according to this embodiment, and a receiving bracket 302 is provided in the seat frame 102 below the guide bracket 301 instead.

Therefore, when the garnish G is tilted backward by being pulled by the airbag E, the bent portion 116a of the link 116 slides down the inclined side 301a of the guide bracket 301 and then falls onto the receiving bracket 302. The bent portion 116a of the link 116 that has fallen on the receiving bracket 302 is connected to the lower side 301b of the guide bracket 301.
And between the receiving bracket 302 and it is locked there. Accordingly, the rearward tilting state of the garnish G is maintained by the link 116, and the garnish G can be used as a knee protector as in the previous embodiment.

Fourth Embodiment (See FIGS. 7 to 10) In this embodiment, an airbag module M is installed above a seat frame 401 via an "impact absorbing member". Reference numeral 402 denotes a first shock absorbing member, which has a structure capable of absorbing a shock force in a process in which the surface 403 serving as the shock force input surface is bent toward the opposite support surface 404 and moved while deforming the deformable portion 405. The airbag module M is mounted on the surface 40 of the first shock absorbing member 402.
3 attached. The first shock absorbing member 4
02 above and below the support surface 404
And a lower hook 402b.
Reference numeral 02a is rotatably attached to the upper side portion 401a of the seat frame 401, and the lower end hook 402b also rotates to the rear end of the auxiliary frame 406 whose front end is rotatably supported to the seat frame 401 via a rotation fulcrum β. Mounted freely.

Between the front and rear ends of the auxiliary frame 406, a second shock absorbing member 408 having a bending deformation portion 407 at the center is provided in a bridging state. A connection fulcrum 406a that can be bent upward is set at an intermediate position of the auxiliary frame 406. The connecting fulcrum 406a is covered with a tubular portion 409 that is slidable back and forth, so that upward bending is restricted, and the tubular portion 409 is connected to the first impact portion. It is connected to a surface 403 of the absorbing member 402 via a rotating link 410 as a “connecting member”.

Next, the operation of this embodiment will be described with reference to FIGS. First, the impact force F when the airbag is deployed rearward from the airbag module M and the rear seat occupant is received by the airbag is first impact absorbing member 4.
02 to the surface 403. Impact force F on surface 403
Is transmitted, the bending deformation portion 405 is deformed so as to be crushed by the impact force F, and the surface 403 moves forward, so that a part of the impact force F is absorbed during this time.

Then, when the surface 403 moves forward,
In response, the rotating link 410 attached to the front surface 403 slides the cylindrical portion 409 forward, so that the connection fulcrum 406a of the auxiliary frame 406 becomes free. When the connection fulcrum 406a is free, the first shock absorbing member 402
Is still applied with a certain degree of impact force F to the surface 403 of the connection fulcrum 406 by the impact force F.
a is bent upward, and the lower end of the first shock absorbing member 402 rotates forward. While the lower end of the first shock absorbing member 402 pivots forward, the bending deformation portion 407 of the second shock absorbing member 408 is deformed.
Can be absorbed.

As described above, the impact force F applied to the airbag E can be absorbed not only by the airbag alone but also by the first impact absorbing member 402 and the second impact absorbing member 408. Occupant protection is further ensured. In addition, since the impact force F applied to the airbag is absorbed to some extent by the first impact absorbing member 402 and the second impact absorbing member 408 and then transmitted to the seat frame 401, the load on the seat frame 401 can be reduced. When manufacturing the frame 401, there is no need to select a particularly high-strength material to form a strong seat frame 401.

Further, when the body of the rear occupant is received by the airbag, the airbag is in a so-called "bottomed state", and a part of the body of the rear occupant is directly in contact with the first shock absorbing member 402. Even in such a situation, as described above, since the lower end of the first shock absorbing member 402 rotates forward,
The occupant will be reliably protected. In order to protect the occupant when the airbag is in a so-called “bottomed state”, the elastic deformation strength of the bending deformation portion 407 of the second shock absorbing member 408 may be too small or too large. This is also undesirable. Therefore, the second shock absorbing member 408
The elastic strength of the bending deformation portion 407 is not less than the impact force input from the airbag module M to the seat frame in the normal case where the airbag does not bottom, and the occupant moves from the occupant to the seatback when the airbag is bottomed. An elastic strength that is equal to or less than the input impact force and is just enough to bend and deform by the impact force is preferable.

Further, since the first shock absorbing member 402 pivots about the upper end portion, the airbag is turned downward, so that the deploying airbag is prevented from escaping upward, and A seat occupant can be received more reliably.

Fifth Embodiment (see FIGS. 11 to 13) This embodiment also shows an example in which an airbag module M is installed above a seat frame 501 via an "impact absorbing member", as in the fourth embodiment. Things. In this example,
The fixed frame 502 is fixed to the seat frame 501 by welding, and the upper side 50 of the seat frame 501 is fixed.
1a is an upper end hook 503a of the first shock absorbing member 503.
Is rotatably mounted. The lower end hook 503b of the first shock absorbing member 503 and the fixed frame 50
2, a U-shaped spring 504 is interposed between the rear end and
The fixed frame 502 and the U-shaped spring 504 form a “second shock absorbing member”. Further, the surface 505 and the support surface 506 of the first shock absorbing member 503 are rotatably supported at one end by the support surface 506, and penetrate the support surface 506 with the other end folded from one end. V-shaped auxiliary frame 507 rotatably supported by
In addition, a connection fulcrum 507a is provided at an intermediate position of the folded portion of the auxiliary frame 507. The connecting fulcrum 507a is covered with a tubular portion 508. The tubular portion 508 has a front end rotatably supported by a seat frame 501 behind a stopper bar 509 as a "connecting member". The ends are installed.

Next, the operation of this embodiment will be described. When the impact force F is transmitted to the surface 505 of the first shock absorbing member 503, first, the second shock absorbing member 504 is deformed so as to be crushed first, and the lower end of the first shock absorbing member 503 moves forward. Rotate. This is because the first shock absorbing member 503
Are connected by an auxiliary frame 507 having a deformed V-shape and the connecting fulcrum 507a is not bent by the cylindrical portion 508. This is because the surface 505 cannot be moved forward. Then, while the lower end of the first shock absorbing member 503 moves forward, a part of the shock force F is absorbed.

When the lower end of the first shock absorbing member 503 rotates forward, the cylindrical portion 508 is moved to the position of the stopper bar 50.
9, the connection fulcrum 507 a of the auxiliary frame 507 passes forward from the tubular portion 508 and becomes free. When the connection fulcrum 507a is in a free state, since a certain degree of impact force F is still applied to the surface 505 of the first shock absorbing member 503, the bending force 510 of the first shock absorbing member 503 is caused by the impact force F. Is deformed to be crushed, and the surface 5
05 moves forward. When the surface 505 moves forward, the auxiliary frame 507 is connected to the connecting fulcrum 507a.
The part is further bent and the whole is lifted up.
Then, a part of the impact force F can be absorbed while the surface 505 moves forward. Further, the first shock absorbing member 5
Since the airbag is turned downward by rotating the 03 around the upper end, the airbag deploying can be prevented from escaping upward, and the rear seat occupant falling forward can be more reliably received. . In the fifth embodiment, the example in which the “second shock absorbing member” is formed by the fixed frame 502 and the U-shaped spring 504 has been described, but the “second shock absorbing member” as in the fourth embodiment is used. May be. Further, when the “second shock absorbing member” is formed by two members as in the fifth embodiment, the structure is not limited to the shape like the U-shaped spring 504, and can be bent to absorb the shock. If the shape
Any thing may be used.

Sixth Embodiment (See FIGS. 14 and 15) Inside a seat back 601, a seat frame 603 which can swing back and forth about a lower end mounting point 603a to a reclining device 602 is provided. The seat frame 603 is swingable back and forth on the rear side of the frame 603 around another lower end mounting point 604a.
And a sub-frame 604 having a lower height. The upper portion of the seat frame 603 is formed as a substantially horizontal bent portion 603c. In a normal use state of the seat back 601 (the reclining angle of the seat frame 603 is indicated by a solid line in FIG. 14),
Is located below the upper end attachment point 603b of the bent portion 603c.

On the other hand, M is an airbag module. The airbag module M is separated into an inflator fixing portion 605 and an airbag storage portion 606, and both are a bellows-like cylinder 60 as a “flexible cylinder”.
It is connected at 7. That is, the base plate 60 is provided in the cylindrical case 608 of the inflator fixing portion 605.
9 is set, and the inflator I is fixed to the base plate 609. A bellows-like cylindrical body 607 is provided on a base plate 609 around the inflator I.
Is fixed such that one end thereof surrounds the injection port 610 of the inflator I.

The case 6 of the airbag storage section 606
11 also has a base plate 612, and an opening 612a is formed in the center of the base plate 612. The other end of the bellows-shaped cylinder 607 is fixed to the front surface of the base plate 612 via a retainer R so as to surround the opening 612a. A folded airbag E is accommodated in a space between the base plate 612 and the front surface 611a, and an inlet 613 of the airbag E is provided at a rear surface of the base plate 612 with a retainer R opposite to the retainer R. It is fixed in a state surrounding the opening 612a by R.

In the airbag module M, the inflator fixing portion 605 is connected to the seat frame 603.
Is fixed to the corner formed by the bent portion 603c on the upper side of the upper side. In addition, the airbag storage section 606 in the rearward facing state.
Is located at the upper end mounting point 603b of the seat frame 603.
And a lower portion of the airbag housing 606 is positioned below the upper end attachment point 603b in the normal use state of the seat back 601.
4 is rotatably attached to the upper end attachment point 604b. Therefore, since the seat frame 603, the sub-frame 604, and the airbag storage section 606 constitute a kind of four-bar linkage, the seat back 1 is tilted backward, and the thus configured four-bar linkage is swung rearward. If it is moved, the direction of the airbag housing 606 mounted between the upper end mounting points 603b, 604b of the seat frame 603 and the sub-frame 604 changes from the rearward state to the upwardly inclined state. Therefore, as a result, in the normal use state of the seat back 601 and the state where the seat back 601 is tilted rearward (the seat frame 603 is reclined at the reclining angle indicated by the two-dot chain line in FIG. 14), the airbag storage portion 606 moves substantially the same point P. Will be oriented. As described above, at the reclining angle at which the position of the airbag module M is lowered, the airbag storage portion 606 is in the upwardly inclined state, so that even if the seat back 601 is inclined backward, the head of the rear seat occupant can be seen. And the chest can be reliably protected. Further, the airbag storage section 606 is provided at the upper end mounting point 60 of the seat frame 603 and the sub-frame 604.
3b and 604b, so that the angle of the airbag storage portion 606 is maintained at the upper ends of the seat frame 603 and the sub-frame 604 even when the reclining angle of the seat frame 603 is changed. Only by changing, the seat frame 603 and the sub-frame 604 themselves do not break from the middle position. Therefore, there is no adverse effect on the back sensation of the occupant sitting on the seat on which the airbag module M is mounted.

As described above, the inflator fixing portion 6
Even if the angle of the airbag storage part 606 is changed with respect to the airbag 05, the two are connected flexibly by the bellows-like cylindrical body 607, so that the gas injected from the inflator fixing part 605 inflator I can be reliably supplied to the airbag. The airbag E in the storage section 606 is deployed. That is, when the gas is injected from the inflator I, the gas passes through the bellows-like cylindrical body 607, passes through the opening 612 a, and is injected and supplied into the airbag E. 611a, and is reliably deployed toward the same point P in the rear seat space.

Further, in this embodiment, the inflator fixing portion 605 electrically connected to various sensors (not shown) is fixed to the seat frame 603 instead of changing the angle of the entire airbag module M. Since only the airbag storage section 606 is movable, the stability of the wiring in the inflator fixing section 605 can be maintained, and the installation space for the airbag module M in the seat back 1 is small. I'm done.

Further, the example in which the inflator fixing portion 605 and the airbag storage portion 606 are connected only by the bellows-like cylindrical body 607 has been described, but in addition to the bellows-like cylindrical body 607, the inflator fixing portion of the airbag storing portion 606 is provided. The inflator fixing portion 605 and the airbag storage portion 606 may be connected by a rotatable link member that allows an angle change with respect to the inflator 605.

[0046]

The airbag device according to the first aspect of the present invention protects the occupant's head and chest using an airbag, and also protects the occupant's knee with a tilting member that tilts backward. Can be.

In the airbag device according to the second and third aspects of the present invention, the first and second shock absorbing members can absorb the impact force applied from the airbag, thereby protecting the rear passenger. Is further ensured, and also protects the seat frame.

In the airbag device according to the fourth aspect of the present invention, even if the airbag module is installed in the seatback, even if the seatback is greatly reclined rearward, the occupant protection performance by the airbag is ensured. Is maintained.

[Brief description of the drawings]

FIG. 1 is a structural view showing an airbag device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a structure of an airbag module.

FIG. 3 is a side view showing an unused state of the airbag.

FIG. 4 is a side view showing a use state of the airbag.

FIG. 5 is a side view showing a link mechanism according to a second embodiment of the present invention.

FIG. 6 is a side view showing a link mechanism according to a third embodiment of the present invention.

FIG. 7 is a side view showing an airbag device according to a fourth embodiment of the present invention.

FIG. 8 is an enlarged side view showing the shock absorbing structure in a state where no impact force is applied.

FIG. 9 is an enlarged side view corresponding to FIG. 8, showing a state in which the first impact force absorbing member is deformed by an impact force.

FIG. 10 is an enlarged side view corresponding to FIG. 8, showing a state in which the second impact force absorbing member is deformed by the impact force and the lower end of the first impact force absorbing member is rotated forward;

FIG. 11 is a side view showing a state in which an impact force has not yet acted on the first impact force absorbing member of the airbag device according to the fifth embodiment of the present invention.

FIG. 12 is an enlarged side view corresponding to FIG. 11, showing a state in which a second impact force absorbing member is deformed by an impact force and a lower end portion of the first impact force absorbing member is rotated forward;

13 is an enlarged side view corresponding to FIG. 11, showing a state in which the first impact-force absorbing member is deformed by an impact force.

FIG. 14 is a side view showing an airbag device according to a sixth embodiment of the present invention.

FIG. 15 is a sectional view showing the structure of an airbag module according to a sixth embodiment.

[Explanation of symbols]

 M airbag module E airbag I inflator G garnish (tilting member) α lower fulcrum 101 seat back 102 seat frame 112 plate (connecting means) 113 cloth piece (connecting means) 114 connecting piece (connecting means) 116 link (link mechanism) 117 Guide bracket (link mechanism) 201 Guide bracket (link mechanism) 203 Link (link mechanism) 204 Lock link (link mechanism) 301 Guide bracket (link mechanism) 302 Receiving bracket (link mechanism) 401 Seat frame 402 First impact absorbing member 406 Auxiliary frame 408 Second shock absorbing member 409 Cylindrical part 410 Rotating link (connecting member) 502 Fixed frame (second shock absorbing member) 503 First shock absorbing member 504 U-shaped spring (second shock absorbing portion) ) 507 auxiliary frame 508 the cylindrical portion 509 stopper bar (connecting member) 603 seat frame 603b upper attachment point 604 subframes 604b upper attachment point 605 inflator fixing portion 606 air bag housing portion 607 bellows tubular body (a flexible tubular body)

Claims (4)

(57) [Scope of request for utility model registration] A tilting member attached to a rear portion of the seat back so as to be tiltable rearward about a lower fulcrum; and an inflator attached to an upper portion of a seat frame of the seat back, the upper portion of the tilting member being passed over the upper portion of the tilting member. An airbag module having an airbag which can also be deployed rearward, and a tilting member for transmitting the deployment force of the airbag to the upper portion of the tilting member and for inducing the deploying airbag downward by tilting the tilting member rearward. A connection means for connecting an upper portion of the airbag and a portion adjacent to an inflator below the airbag, and a link mechanism for restricting forward tilting of the tilting member which is tilted rearward. Bag device. 2. A first shock absorbing member having a structure in which a bending deformation portion is provided between a surface serving as an impact force input surface and a support surface whose upper end is rotatably attached to an upper side of a seat frame. An airbag module attached to the surface of the first shock absorbing member so that the airbag can be deployed backward, and interposed between a lower end portion of a support surface of the first shock absorbing member and a seat frame. A second shock absorbing member capable of being deformed and deformed, one end of which is rotatably mounted on the seat frame and the other end of which is rotatably mounted on the lower end of the support surface of the first shock absorbing member, and is bent in the middle. An auxiliary frame having a free connection fulcrum, and a slidable cylindrical portion provided on the connection fulcrum; and both ends of the cylindrical portion of the auxiliary frame and the surface of the first shock absorbing member being rotatable. And a connecting member to be attached. Airbag apparatus characterized by there. 3. A first shock absorbing member having a structure in which a bending deformation portion is provided between a surface serving as an impact force input surface and a support surface whose upper end is rotatably attached to an upper side of a seat frame. An airbag module attached to the surface of the first shock absorbing member so that the airbag can be deployed backward, and interposed between a lower end portion of a support surface of the first shock absorbing member and a seat frame. A bent and deformable second shock absorbing member, a portion of which one end is rotatably attached to the support surface and the other end is turned back to be rotatably mounted on the surface of the first shock absorbing member and turned back. An auxiliary frame having a bendable connection fulcrum in the middle of the slidable tubular part, and both ends are rotatably mounted on the cylindrical part of the auxiliary frame and the seat frame, respectively. And the connecting member to be Air bag device, characterized in that are e. 4. An airbag module, a seat frame which is mounted to swing back and forth about a lower end mounting point and sets a reclining angle of a seat back, and another lower end mounting point after the seat frame. A subframe, which is mounted to be swingable back and forth and has a height lower than the seat frame, is provided inside the seat back, and an upper end of the airbag module in a rearward facing state is provided at an upper end mounting point of the seat frame. The lower part of the airbag module in the rearward state is vertically rotatably mounted at the upper end mounting point of the sub-frame so as to be vertically rotatable, and the upper end mounting point of the seat frame and the upper end of the sub-frame are mounted. An airbag device, wherein an airbag module is located between the airbag module and the point.