JPH1053089A - Air bag device of vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air bag device for a vehicular seat, which can certainly open only the nominal joint parts without bringing about degradation of the appearance. SOLUTION: A reinforcing sheet S1 is provided on the rear surface of the gore part 17 of a vehicular seat, and because the sheet S1 has a strength higher than the gore part 17 and also an expansiveness not more than the gore part 17, the inflating force of the air bag concerned 10 is received by the sheet S1 , and no force will act directly on the gore part 17. Therefore, the gore part 17 will never be ruptured in any part on the way other than the joint parts H1 and H2 . As the air bag 10 spread forward, the rupture is made certainly from the nominal joint part H1 situated in front. There is no risk either that the appearance is degraded because the reinforcing sheet S1 is located on the back of the gore part 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can protect an occupant by relaxing an impact load received from a side wall of a vehicle body by deploying an airbag provided in a seat back or the like in a side collision of a vehicle. The present invention relates to an airbag device for a vehicle seat.

[0002]

2. Description of the Related Art Conventionally, in order to avoid a direct impact between a side wall of a vehicle body such as a door deformed by an impact load and a seated occupant in a side collision of a vehicle, see Japanese Patent Application Laid-Open No. 4-5005.
Various airbag devices, such as those known in Japanese Patent Publication No. 2 (JP-A) No. 2 and the like have been proposed.

The structure of a seat back will be described as an example. First, an air bag module having a structure including an air bag and an inflator is mounted on a side portion of a seat back frame inside the seat back, and a pad is attached to the seat back frame. The seat back frame to which the airbag module and the pad material are finally attached is covered with a skin material. This skin material is composed of a plurality of members, and is formed by integrating the respective members into a bag shape through joints (sewing portions) along the vertical direction.

[0004] Of the plurality of sewn portions of the skin material, a sewn portion located in the deployment direction (front) of the airbag is a normal tearing position, and the sewn portion is torn by the airbag inflated at the time of vehicle collision. From there, the airbag is deployed forward.

[0005]

However, in such a conventional technique, although the regular sewing portion located in the deployment direction of the airbag is torn by the airbag, the inflatable air is cut. Since the force of the bag acts not only on the regular sewn portion in the deployment direction but also on another sewn portion located in the vicinity, unintended sewn portions other than the regular sewn portion may be torn. There is a risk. If the sewn portion in the direction other than the deployment direction is torn, the airbag is not deployed in the normal direction, which is not preferable. For this reason, conventionally, it was difficult to set another sewn portion near the regular sewn portion in the deployment direction, and the design freedom of the skin material was limited.

[0006] Further, there is a possibility that the skin material is torn at an intermediate portion other than the sewing portion due to the inflation force of the airbag. Therefore, it is necessary to form the entire skin material with a high-strength member.
That is, if only a part is made of a high-strength member, only that part is noticeable and the appearance is deteriorated. Therefore, the entire skin material must be formed of a high-strength member, which is very disadvantageous in terms of cost.

The present invention has been made by paying attention to such a conventional technique, and without deteriorating appearance.
An object of the present invention is to provide an airbag device for a vehicle seat that can surely cleave only a regular joint.

[0008]

According to the first aspect of the present invention,
A skin material covering the seat back frame and the pad material of the seat back includes at least a main portion covering a front central portion of the seat back, a main side portion covering both front portions of the seat back, and a gusset covering side portions of the seat back. And a back portion that covers the back portion of the seat back, and respective corresponding ends are joined at a joining portion along the up-down direction, and on the outer portion in the vehicle width direction of the seat back frame, In an airbag device for a vehicle seat to which an airbag module having a built-in airbag and an inflator for gas generation that is deployed forward is attached, at least a portion corresponding to the airbag module on the back side of the gusset has strength. In addition to providing a reinforcing sheet having a gusset or more and an elasticity equal to or less than the gusset, a corresponding end of the reinforcing sheet is also provided. It is obtained by each joined at the junction of the two ends of the switch unit.

According to the first aspect of the present invention, since the reinforcing sheet provided on the back side of the gusset has strength equal to or greater than the gusset and elasticity equal to or less than the gusset, the inflation of the airbag is increased. The force is received by the reinforcing sheet, and is not directly applied to the gusset. In other words, the reinforcing sheet has a high strength, so that it is not likely to be torn, and since it has low elasticity, it can receive all the expansion force, so that the expansion force does not directly act on the gusset, and It will not be cleaved from any part other than. Furthermore, the corresponding ends of the reinforcing sheet before and after are also joined at the joints before and after the gusset, and the inflation force of the airbag is applied to the joints before and after the gusset via the reinforcing sheet. Since the deployment direction of the front is forward, the force applied to the front regular joint is larger, and the regular joint is surely torn.

Further, since the reinforcing sheet is provided on the back side of the gusset, even if another joint is set in the middle of the gusset, the joint is not cleaved from the joint. Therefore, another joint can be provided near the regular joint, and the degree of design freedom of the skin material is improved. In addition, since the skin material has the reinforcing sheet on the back side that cannot be seen from the outside, it is excellent in appearance. In addition, since the corresponding ends of the reinforcing sheet are sewn together to the sewn portions, the reinforcing sheet is integrated with the skin material, and the work of wrapping the seat back frame and the pad material with the skin material is easy.

In the structure of the present invention, as long as the above structure is provided, a reinforcing sheet may be provided on the back side of the back portion and the back side of the main portion, or the back portion and the main portion provided with the reinforcing sheet may be provided. (See Claims 2 to 6).

[0012] According to a seventh aspect of the present invention, a reinforcing sheet having strength equal to or higher than the back portion and elasticity equal to or lower than the back portion is provided at least on a portion corresponding to the airbag module on the back side of the back portion. The corresponding ends are also joined at the joints at both ends of the back portion.

According to the seventh aspect of the present invention, since one end of the back portion joining the corresponding ends of the reinforcing sheet is a joining portion behind the gusset, the joining force at the joining portion behind the gusset is smaller. Is higher than the front joint. Therefore, when the inflation force of the airbag is applied to the gusset, the joint at the back of the gusset is not torn, but is reliably torn from the regular joint at the front.

Further, since the reinforcing sheet is provided on the back side of the back portion, even if another joining portion is set in the middle of the back portion, the joining portion does not split. In addition, the structure of the present invention may be provided with a reinforcing sheet on the back side of the main portion as long as the above-described configuration is provided, or by setting another joining portion in the middle of the main portion provided with the reinforcing sheet. (Claims 8 to 10).

According to the eleventh aspect of the present invention, at least a portion corresponding to the airbag module on the back side of the gusset portion and the main side portion has strength equal to or greater than the gusset portion and the main side portion and elasticity of the gusset portion and the main side portion. The following reinforcing sheets are provided, and the corresponding ends of the reinforcing sheet are also joined at the joining portions at both ends of the gusset portion and the main side portion, and the joining force reducing means is provided at the joining portion between the gusset portion and the main side portion. It has been subjected to.

According to the eleventh aspect of the invention, since the reinforcing sheet is provided on the back side of the gusset portion and the main side portion, the gusset portion and the main side portion do not split from the middle part other than the joint. In addition, since the joint portion between the gusset portion and the main side portion is provided with the joining force reducing means, the regular joint portion is surely torn by the inflation force of the airbag.

Further, since the reinforcing sheet is provided on the back side of the gusset portion and the main side portion, even if another joining portion is set in the middle of the gusset portion and the main side portion, it is not possible to cleave from the joining portion. Absent. Incidentally, the structure of the present invention may be provided with a reinforcing sheet on the back side of the back portion and the back side of the main portion as long as the above configuration is provided, or in the middle of the back portion and the main portion provided with the reinforcing sheet. Another joint may be set (claims 12 to 20).

According to a twenty-first aspect of the present invention, a reinforcing sheet having strength equal to or higher than the main side portion and elasticity equal to or lower than the main side portion is provided at least on a portion corresponding to the airbag module on the back side of the main side portion. The corresponding ends of the reinforcing sheet are also joined at the joints at both ends of the main side,
Among the joining portions at both ends of the main side portion, a joining force reducing means is applied to a joining portion on the gusset portion side.

According to the twenty-first aspect of the present invention, since the reinforcing sheet is provided on the back side of the main side portion, the main side portion is not split from any part other than the joint. In addition, since the joining force reducing means is provided at the regular joining portion on the gusset portion side, the joining portion is surely torn by the inflation force of the airbag.

Further, since the reinforcing sheet is provided on the back side of the main side portion, even if another connecting portion is set in the middle of the main side portion, it does not split from the connecting portion. Incidentally, the structure of the present invention may be provided with a reinforcing sheet on the back side of the back portion and the back side of the main portion as long as the above configuration is provided, or in the middle of the back portion and the main portion provided with the reinforcing sheet. Another joint may be set (claims 22 to 26).

The skin material may be a cloth member, a structure in which a wadding portion is sandwiched between cloths, leather, vinyl, or anything. The joint may be a sewn portion with a sewing thread, a bonded portion with an adhesive, or a welded portion with heat.

As the joining force reducing means, when the joining portion is a sewing portion made of sewing thread, the sewing pitch may be relatively enlarged (claim 27), and the strength of the sewing thread may be relatively increased. It may be lowered (claim 28).

The main part and the main side part may be formed continuously as one piece.

A trim may be provided instead of the back portion.

[0025] Instead of the seat back, a similar structure may be provided on the seat cushion.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. Figure 1 shows the left front seat 1
It comprises a seat cushion 2 attached to a floor panel so as to be movable back and forth, and a seat back 3 which is rotatable back and forth.

Inside the seat back 3, an inverted U-shaped seat back frame 4, whose shape is not clear in the drawing, is provided. Side panels 5 are fixed to the left and right sides of the seat back frame 4. (Only the left side panel 5 is shown in FIGS. 3 and 4). An S-shaped seat spring 6 is provided between the left and right side panels 5.

An airbag module 7 is mounted on the left side (outside in the vehicle width direction) of the left and right side panels 5 facing the vehicle body side wall. The airbag module 7 includes a metal case 9 having an opening 8 in the front, an airbag 10 folded in a bellows shape, and an inflator 11 for generating gas for inflating and deploying the airbag. The airbag 10 and the inflator 11 are housed in a case 9, and the opening 8 of the case 9 is closed with a thin sheet (not shown) that is easily broken.
The airbag module 7 is fixed to the side panel 5 via mounting pieces 12 formed above and below the case 9.

The seat back 3 is provided with a pad material 13 for obtaining cushioning. Side portions 13a are protrudingly formed on both left and right sides of the pad material 13.

The entire seat back frame 4 to which the pad material 13 and the airbag module 7 are attached is covered with a skin material 14. The skin material 14 has a structure in which a wadding portion is sandwiched between cloths, but is not shown.

The skin material 14 includes a main portion 15 covering the front center portion of the seat back 3, a main side portion 16 covering both front portions (the side portions 13a), and a gusset portion covering the side portions of the seat back 3. 17 and seat back 3
And a back portion 18 which forms the back surface portion.
And the main part 15, the main side part 16, the gusset part 1
7. The corresponding ends of the back portion 18 are sewn at sewing portions H ₁ , H ₂ , and H ₃ as “joining portions” along the vertical direction, respectively.

The seat cushion 2 has basically the same structure as the seat back 3, and a pad material is attached to a seat cushion frame (not shown), and
It has a structure covered with 9. In some cases, an airbag module that deploys the airbag upward is also attached to the seat cushion frame of the seat cushion 2. The skin material 19 of the seat cushion 2 includes a main portion 20 covering a central portion of the upper surface, and a main side portion 2 covering both side portions of the upper surface.
1, a front portion 22 covering the front surface, and a gusset portion 23 covering the side portions, each of which is a sewing portion H ₄ , H ₅ , H
It is sutured by ₆ . The lower surface of the seat cushion 2 has a skin material 19 for installing a slide rail mechanism.
Has been omitted.

Further, the airbag reinforcing sheet S ₁ is a portion corresponding to the module 7 is provided (in FIG. 1 shaded shown partially) in the back side of the gusset portion 17 of the seat back 3. The corresponding end of the reinforcing sheet S ₁ is sewn together at sewn portions H _1, H ₂ of the front and rear respectively gusseted portion 17. The reinforcing sheet S ₁ is a high strength of at least equal to the gusset portion 17, must and one having a gusseted portion 17 equal to or less than the stretch. In this embodiment, as the reinforcing sheet S _1, by using the same material as the airbag 10 (for example, polyester, nylon, etc.), sufficiently high strength than gore 17, also sufficiently than gusseted portion 17 It has low elasticity.

The skin material 14 is formed by adding the reinforcing sheet S ₁
Because it is provided on the back side that is not visible from the outside, it is excellent in appearance. Moreover, since the corresponding end of the reinforcing sheet S ₁ is stitched together, respectively to the sewing section H _1, H _2, the reinforcing sheet S ₁ is integrated with the skin material 14, the seat back frame 4 and in said surface skin material 14 The work of wrapping the pad material 13 is easy.

The airbag 10 of this embodiment is intended to be deployed to the front, sewn portion H ₁ of the gusset portion 17 and the main side portion 16 becomes the cleavage position of the normal, the skin material 14 is cleaved at the sewn portion H ₁ Must. Generally, skin material 1
The normal cleavage position in 4 is the airbag module 7
Structure or, but in which changes in accordance with the distance between the vehicle body side wall adjacent to the seat back 3, in the case of this embodiment, by the sewing unit H ₁ in the deployment direction of the airbag 10 is cleaved, The airbag 10 is deployed forward in the most effective state.

Next, a state where the airbag 10 is deployed will be described. When the vehicle causes a side collision, a sensor detects the state and a high-pressure gas is ejected from the inflator 11 into the airbag 10. This gas causes the airbag 10 to inflate in the case 9, and the airbag 10 expands forward while expanding the opening edge 8 a of the case 9 outward,
The front pad material 13 is crushed.

[0037] At this time, the outward force from the opening edge 8a of the case 9 to the gusset portion 17 is applied, since the reinforcing sheet S ₁ on the back side of the gusset portion 17 is provided, gusseted portion 17 has an opening edge 8a Is not cleaved at the position corresponding to. That is,
Since the reinforcing sheet S ₁ is not stretchable than gusseted portion 17 and a high strength than the gore 17, the expansion force of the air bag 10 applied from the opening edge 8a outwards are securely be received by the reinforcing sheet S _1, The gusset part 17 is reliably prevented from being cleaved midway (at a position corresponding to the opening edge 8a).

The airbag 10 added to the reinforcing sheet S ₁
Is applied to the sewn portions H ₁ and H ₂ before and after the gusset portion 17 via the reinforcing sheet S ₁ , but the deployment direction of the airbag 10 is forward, and the airbag 10 pushes the pad material 13 to break forward. direct force of the air bag 10 to deploy also joined, towards the force applied to the sewn portion H ₁ of the front legitimate, the rear of the sewing portion H
_It is greater than the force applied to ₂ . Therefore, the sewn portion H ₁ of the front legitimate reliably cleaved, the airbag 10 is deployed forward in an optimum state.

Next, a modification of the first embodiment is shown in FIG. The numbers in the circles in the figure correspond to the claims in the claims. That is, for example, claim 2 is shown. In addition, in the drawings after FIG. 5B, insignificant reference numerals are omitted to avoid complication of the drawing.

FIG. 5A shows the structure of the first embodiment for reference.

As shown in FIG. 5B, the gusset part 17 is formed of two members (two or more members may be provided), and the corresponding ends of the two members are joined to an intermediate part of the gusset part 17. sewing unit h ₁ of the present (may be two or more) is formed.
Thus be set another sewing portion h ₁ in the middle of the gusset portion 17, the reinforcing sheet S ₁ on the back side is provided, it will not be cleaved from the sewing unit h _1.

As shown in FIG. 5C, a reinforcing sheet S ₂ was provided also on the back side of the back portion 18. The corresponding end of the opposite ends of the reinforcing sheet S ₂ is stitched together to the sewing portion of H ₂ back portion 18. By doing so, the bonding strength of the sewn portions of H ₂ side is increased after the gusseted portion 17, the front of the normal sewing section H ₁
Will surely be cleaved.

[0043] As shown in FIG. 5 (d), the may be set different sewing portion h ₁ gusset portion 17 of FIG. 5 (c). 5 as shown in (e), may be set a different sewing portion h ₂ to the back portion 18 of FIG. 5 (c). As shown in FIG. 5F, different sewing portions h ₁ and h ₂ may be set in the gusset portion 17 and the back portion 18 in FIG. 5C, respectively.

FIGS. 6 (a) to 6 (f) show FIGS.
The reinforcing sheet S ₃ on the back side of the main portion 5 of the (f) illustrates an example in which, respectively.

FIGS. 7A to 7F show FIGS.
The main portion 5 of the (f) Another sewing portion h ₃ illustrates an example in which, respectively.

Next, a second embodiment of the present invention will be described with reference to FIG.
It will be described based on. In this embodiment, the back portion 18
Only the rear side is provided with a reinforcing sheet S _2. According to this embodiment, for suturing the corresponding end of the reinforcement on the sewing portion of H ₂ side sheet S ₂ after the gusseted portion 17, the sewn portion it is the front of the normal bonding strength of the sewn-made part H ₂ H ₁ since it is growing than, and thus to reliably cleaved sewing portion H ₁ of the normal at the time of deployment of the air bag 10.

Next, a modification of the second embodiment is shown in FIG.
To (f). 8 may be set different sewing portion h ₂ to the back portion 18 as shown in (b). As shown in FIG.
Figure 8 on the rear side of the main portion 15 may be provided with a reinforcing sheet S ₃ of (a). As shown in FIG. 8 (d), the may be provided a reinforcing sheet S ₃ on the back side of the main portion 15 of FIG. 8 (b). FIG.
As in (e), it may be provided separate sewn portion h ₃ to the main unit 15 of FIG. 8 (c). As shown in FIG.
The main portion 15 of (d) may be provided separate stitching portion h _3.

Next, a third embodiment of the present invention will be described with reference to FIG.
It will be described based on. In this embodiment, the gusset parts 17 and
And reinforcing sheets on the back side of the main side part 16
S₁, S _FourWas provided. And the corresponding end is regular
Sewing part H₁And sutured. Therefore, in this state, sewing
Part H₁Of the regular sewing portion H₁At
Since it is not possible to expect reliable cleavage,₁To
A joining force reducing means T (shown by a circle in the drawing) was provided. Joining strength
The lowering means T includes a sewing portion H₁Sewing pitch of other sewing part H
_Two, H_ThreeOr the sewing part H₁
The strength of the sewing thread of the other sewing portion H_Two, H_ThreeThan the sewing thread
Although there is a method of lowering relatively, this third implementation
In the form, the former was adopted. According to the third embodiment,
Cleavage at the gusset part 17 and the main side part 16 is reliable.
At the same time, and the bonding force lowering means T
Sewing part H of rule₁Can be surely cleaved.

Next, a modification of the third embodiment is shown in FIG.
17 (d). As shown in FIG.
It may be set to another sewn portion h ₁ in. It may be set different sewing portion h ₄ on the main side portion 16 as shown in FIG. 9 (c). As shown in FIG. 9D, different sewing portions h ₁ and h ₄ may be set in the gusset portion 17 and the main side portion 16.

As shown in FIGS. 10A to 10D, FIG.
(A) ~ each reinforcing sheet S ₃ on the back side of the main portion 15 may be provided for (d).

As shown in FIGS. 11A to 11D, FIG.
0 (a) the main portion 15 of ~ (d) may be provided separate stitching portion h _3.

As shown in FIGS. 12A to 12D, FIG.
(A) ~ each reinforcing sheet S ₂ on the back side of the back portion 18 may be provided for (d).

As shown in FIGS. 13A to 13D, FIG.
2 (a) to the back portion 18 of ~ (d) may be provided another sewing portion h _2.

As shown in FIGS. 14A to 14D, FIG.
2 (a) ~ each reinforcing sheet S ₃ on the back side of the main portion 15 may be provided for (d).

As shown in FIGS. 15A to 15D, FIG.
4 (a) to the main portion 15 of ~ (d) may be provided separate stitching portion h _3.

As shown in FIGS. 16A to 16D, FIG.
4 (a) to the back portion 18 of ~ (d) may be provided another sewing portion h _2.

As shown in FIGS. 17A to 17D, FIG.
6 (a) ~ the main portion 15 may be provided separate sewn portion h ₃ of (d).

Next, a fourth embodiment of the present invention will be described with reference to FIG.
Description will be made based on (a). In this embodiment, provided with a reinforcing sheet S ₄ on the rear side of the main side portion 16. Accordingly, in this state, the bonding strength of the sewn portions H ₁ becomes strong, since reliable cleavage at the sewn portion H ₁ of the normal can not be expected, the bonding strength lowering means T to the sewing unit H ₁ in this embodiment
Was provided.

Next, a modification of the fourth embodiment is shown in FIG.
(B) to (d) of FIG. Fig. 18 (b)
Another sewing portion h is attached to the main side portion 16 of FIG._FourSet
May be specified. As shown in FIG.
Reinforcing sheet S on the back side of _TwoMay be provided. Figure
18 (d), the back side of the back portion 18 of FIG. 18 (b)
Reinforced sheet S_TwoMay be provided. As shown in FIG.
Another sewing portion h is attached to the back portion 18 in FIG._TwoProvided
You may. As shown in FIG. 18F, the back of FIG.
Another sewing part h in the part 18_TwoMay be provided.

As shown in FIGS. 19A to 19D, FIG.
8 (a) ~ each reinforcing sheet S ₃ on the back side of the main portion 15 may be provided for (d).

As shown in FIGS. 20A to 20D, FIG.
9 (a) to the main portion 15 of ~ (d) may be provided separate stitching portion h _3.

In the above description, the seat back 3 is taken as an example. However, as described above, the seat cushion 2 has substantially the same seat structure as the seat back 3, and the air bag is also directed upward in the seat cushion 2. In some cases, the same structure as that of the above embodiment can be applied to the seat cushion 2 having such a structure.

Although the front seat 1 of the vehicle has been described as an example, the present invention can be applied to a rear seat.

Further, an example has been shown in which the reinforcing sheet S _{1 and the} like are provided only in the portion corresponding to the airbag module 7 such as the gusset portion 17. May be provided.

[0065] In addition, the reinforcing sheet S ₁ and the like, joined only its corresponding end, but the other parts were to be provided in a free state with respect to the gusset portion 17 and the like, the entire surface of such a reinforcing sheet S ₁ What adhere | attached (laminated or coated) on the back surface of the gusset part 17 grade | etc., May be sufficient.

Further, a trim may be attached instead of the back portion 18 of the skin material 14 of the seat back 3.

[0067]

According to the present invention, it is possible to surely cleave only the regular joint without lowering the appearance. Therefore, another joint can be set near the regular joint, and the design freedom of the skin material is improved.

Also, since the corresponding ends of the reinforcing sheet are joined together to the joint of the skin material, the reinforcing sheet is integrated with the skin material, and the work of covering the skin material with the seat back frame and the pad material is easy. is there.

Since the reinforcing sheet is provided in various combinations at each part of the skin material, the part where the reinforcing sheet is provided does not split at any part other than the joint. In the case where the joining force of the regular joint increases due to the provision of the reinforcing sheet, since the joining force reducing means is applied to the joint, the regular joint is surely torn. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing a seat according to a first embodiment of the present invention.

FIG. 2 is a perspective view corresponding to FIG. 1, showing a state in which the airbag is deployed forward.

FIG. 3 is a cross-sectional view of the seat back taken along line SA-SA shown in FIG.

FIG. 4 is a sectional view corresponding to FIG. 3, showing a state in which the airbag is deployed forward.

FIG. 5 is a schematic cross-sectional view of a seat back showing a modification of the first embodiment.

FIG. 6 is a schematic sectional view corresponding to FIG. 5, showing a modified example in which a reinforcing sheet is added to a main portion.

FIG. 7 is a schematic sectional view corresponding to FIG. 6, showing a modification in which another joining portion is provided in the main portion.

FIG. 8 is a schematic cross-sectional view showing a seat back according to a second embodiment of the present invention and its modification.

FIG. 9 is a schematic cross-sectional view showing a seat back according to a third embodiment of the present invention and its modification.

FIG. 10 is a schematic sectional view corresponding to FIG. 9 showing a modified example in which a reinforcing sheet is added to a main portion.

FIG. 11 is a schematic sectional view corresponding to FIG. 10 and showing a modification in which another joining portion is provided in the main portion.

FIG. 12 is a schematic sectional view corresponding to FIG. 9 showing a modified example in which a reinforcing sheet is added to a back portion.

FIG. 13 is a schematic cross-sectional view corresponding to FIG. 12, showing a modification in which another joining portion is provided in the back portion.

FIG. 14 is a schematic cross-sectional view corresponding to FIG. 13 showing a modified example in which a reinforcing sheet is added to a main portion.

FIG. 15 is a schematic sectional view corresponding to FIG. 14 showing a modification in which another joining portion is provided in the main portion.

FIG. 16 is a schematic sectional view corresponding to FIG. 14 showing a modified example in which another joining portion is provided in the back portion.

FIG. 17 is a schematic sectional view corresponding to FIG. 16 showing a modification in which another joining portion is provided in the main portion.

FIG. 18 is a schematic sectional view showing a seat back according to a fourth embodiment of the present invention and its modification.

FIG. 19 is a schematic sectional view corresponding to FIG. 18 showing a modified example in which a reinforcing sheet is added to a main portion.

FIG. 20 is a schematic cross-sectional view corresponding to FIG. 19 showing a modification in which another joining portion is provided in the main portion.

[Description of Signs] 1 seat 2 seat cushion 3 seat back 4 seat back frame 5 side panel 6 seat spring 7 airbag module 8 opening 8a opening edge 9 case 10 airbag 11 inflator 12 mounting piece 13 pad material 13a side portion 14 skin Material 15 Main part 16 Main side part 17 Depth part 18 Back part 19 Skin material (seat cushion) 20 Main part (seat cushion) 21 Main side part (seat cushion) 22 Front part (seat cushion) 23 Depth part (seat cushion) H ₁ to H ₃ sewn portion of the seat back (junction) H ₄ to H ₆ sewn portion of the seat cushion (junction) h ₁ to h ₄ by the sewn portion (joining portion) S ₁ to S ₄ reinforcing sheet T junction Power reduction means

Continued on the front page (72) Inventor Hideaki Kumon 771 Koizono, Ayase-shi, Kanagawa Ikeda Bussan Co., Ltd. (72) Inventor Junko Abe 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd. (72) Inventor Masanori Narita 2 Nissan Motor Co., Ltd., 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Prefecture (72) Inventor Yasuki Matsuura 2 Nissan Motor Co., Ltd. 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Prefecture (72) Takaaki Uno Yokohama, Kanagawa Prefecture Nissan Motor Co., Ltd., 2 Takaracho, Kanagawa-ku, Yokohama-shi

Claims (31)

[Claims] 1. A skin material covering a seat back frame and a pad material of a seat back includes at least a main part covering a front center part of the seat back, a main side part covering both front parts of the seat back, and a seat back part. It comprises a gusset part covering the side part and a back part covering the back part of the seat back, and respective corresponding ends are joined at joining parts along the vertical direction, and the vehicle width of the seat back frame An airbag module having a built-in airbag and a gas-generating inflator mounted on the outer side in the direction of the vehicle, wherein the airbag module corresponds to at least the airbag module on the back side of the gusset. A reinforcing sheet having strength equal to or greater than the gusset and elasticity equal to or less than the gusset is provided at the site, and the reinforcing sheet is provided. DOO corresponding end rather airbag device for a vehicle seat, characterized in that the respective joint at the junction of the two ends of the gusset portions. 2. The gusset part is formed from two or more members,
2. The airbag device for a vehicle seat according to claim 1, wherein one or more joints for joining corresponding ends of the two or more members are formed along a vertical direction at an intermediate portion of the gusset. 3. A reinforcing sheet having strength equal to or higher than the back portion and elasticity equal to or lower than the back portion is provided at least on a portion corresponding to the airbag module on the back side of the back portion.
3. The airbag device for a vehicle seat according to claim 1, wherein corresponding ends of the reinforcing sheet are also joined at joints at both ends of the back portion. 4. A back portion is formed of two or more members, and one or more joint portions for joining corresponding ends of the two or more members are formed along a vertical direction at an intermediate portion of the back portion. The airbag device for a vehicle seat according to claim 3, wherein the airbag device is provided. 5. A reinforcing sheet having strength equal to or higher than the main portion and elasticity equal to or lower than the main portion is provided on at least a portion corresponding to the airbag module on the back side of the main portion.
The airbag device for a vehicle seat according to any one of claims 1 to 4, wherein a corresponding end of the reinforcing sheet is also joined at joints at both ends of the main portion. 6. A main part is formed from two or more members, and one or more joints for joining corresponding ends of the two or more members are formed along a vertical direction at an intermediate portion of the main part. The airbag device for a vehicle seat according to claim 5, wherein 7. A seat cover covering a seat back frame and a pad material of a seat back, wherein a main portion covers at least a front center portion of the seat back; a main side portion covers both front portions of the seat back; It comprises a gusset part covering the side part and a back part covering the back part of the seat back, and respective corresponding ends are joined at joining parts along the vertical direction, and the vehicle width of the seat back frame An airbag module having a built-in airbag and a gas-generating inflator mounted on the outer side in the direction of the vehicle, wherein the airbag module corresponds to at least the airbag module on the back side of the back portion. In addition to providing a reinforcing sheet having strength equal to or higher than the back portion and elasticity equal to or lower than the back portion, Strong sheet corresponding end rather airbag device for a vehicle seat, characterized in that the joint at the junction of the two ends of the back portion. 8. A back portion is formed of two or more members, and one or more joint portions for joining corresponding ends of the two or more members are formed along a vertical direction at an intermediate portion of the back portion. The airbag device for a vehicle seat according to claim 7, wherein the airbag device is provided. 9. A reinforcing sheet having strength equal to or higher than the main portion and elasticity equal to or lower than the main portion is provided at least on a portion corresponding to the airbag module on the back side of the main portion.
9. The airbag device for a vehicle seat according to claim 7, wherein the corresponding ends of the reinforcing sheet are also joined at joints at both ends of the main portion. 10. The main part is formed of two or more members, and one or more joints for joining corresponding ends of the two or more members are formed along a vertical direction at an intermediate portion of the main part. The airbag device for a vehicle seat according to claim 9, wherein 11. A seat material covering a seat back frame and a pad material of a seat back includes a main portion covering at least a front central portion of the seat back, a main side portion covering both front portions of the seat back, and a seat back portion. It comprises a gusset part covering the side part and a back part covering the back part of the seat back, and respective corresponding ends are joined at joining parts along the vertical direction, and the vehicle width of the seat back frame An airbag module having a built-in airbag and a gas-generating inflator mounted on an outer side in a direction, wherein the airbag module has a built-in inflator for gas generation. In the area corresponding to the module, the strength is higher than the gusset and main side A reinforcing sheet below the main side portion is provided, and each corresponding end of the reinforcing sheet is also joined at a joining portion at both ends of the gusset portion and the main side portion, and is joined to a joining portion of the gusset portion and the main side portion. An airbag device for a vehicle seat, wherein a force reducing means is provided. 12. At least one of the gusset portion and the main side portion is formed from two or more members, and the corresponding ends of the two or more members are joined to a middle portion of the gusset portion or the main side portion. The airbag device for a vehicle seat according to claim 11, wherein one or more joints are formed along the vertical direction. 13. A reinforcing sheet having strength equal to or higher than the main portion and elasticity equal to or lower than the main portion is provided at least on a portion corresponding to the airbag module on the back side of the main portion, and a corresponding end of the reinforcing sheet is also provided on the main portion. The airbag device for a vehicle seat according to claim 11, wherein the airbag device is joined at joints at both ends. 14. A main part is formed of two or more members, and one or more joints for joining corresponding ends of the two or more members are formed along a vertical direction at an intermediate portion of the main part. The airbag device for a vehicle seat according to claim 13, wherein: 15. A reinforcing sheet having strength equal to or higher than the back portion and elasticity equal to or lower than the back portion is provided on at least a portion on the back side of the back portion corresponding to the airbag module, and a corresponding end of the reinforcing sheet is also provided on the back portion. The airbag device for a vehicle seat according to claim 11, wherein the airbag device is joined at joints at both ends. 16. The back portion is formed of two or more members, and one or more joint portions for joining corresponding ends of the two or more members are formed along a vertical direction at an intermediate portion of the back portion. The airbag device for a vehicle seat according to claim 15, wherein the airbag device is provided. 17. A reinforcing sheet having strength equal to or higher than the main portion and elasticity equal to or lower than the main portion is provided on at least a portion corresponding to the airbag module on the back side of the main portion, and a corresponding end of the reinforcing sheet is also provided on the main portion. The airbag device for a vehicle seat according to claim 15, wherein the airbag device is joined at joints at both ends. 18. A main part is formed of two or more members, and one or more joints for joining corresponding ends of the two or more members are formed along a vertical direction at an intermediate portion of the main part. The airbag device for a vehicle seat according to claim 17, wherein the airbag device is provided. 19. The back portion is formed of two or more members, and one or more joint portions for joining corresponding ends of the two or more members are formed along a vertical direction at an intermediate portion of the back portion. The airbag device for a vehicle seat according to claim 17, wherein the airbag device is provided. 20. A main part is formed of two or more members, and one or more joints for joining corresponding ends of the two or more members are formed along a vertical direction at an intermediate portion of the main part. 20. The airbag device for a vehicle seat according to claim 19, wherein: 21. A skin material covering a seat back frame and a pad material of a seat back, wherein a main portion covers at least a front central portion of the seat back; a main side portion covers both front portions of the seat back; It comprises a gusset part covering the side part and a back part covering the back part of the seat back, and respective corresponding ends are joined at joining parts along the vertical direction, and the vehicle width of the seat back frame An airbag module having a built-in airbag and a gas-generating inflator mounted on an outer side in a direction, wherein the airbag module has a built-in inflator for generating gas. The reinforcing sheet with strength equal to or higher than the main side and elasticity equal to or lower than the main side And the corresponding end of the reinforcing sheet is also joined at the joining portions at both ends of the main side portion, and of the joining portions at both ends of the main side portion, joining force reducing means is applied to the joining portion on the gusset side. An airbag device for a vehicle seat, characterized in that: 22. The main side portion is formed of two or more members, and one or more joint portions for joining corresponding ends of the two or more members at an intermediate portion of the main side portion along a vertical direction. 22. The airbag device for a vehicle seat according to claim 21, wherein the airbag device is formed as follows. 23. A reinforcing sheet having strength equal to or higher than the back portion and elasticity equal to or lower than the back portion is provided on at least a portion corresponding to the airbag module on the back side of the back portion, and a corresponding end of the reinforcing sheet is also provided in the back portion. The airbag device for a vehicle seat according to claim 21 or 22, wherein the airbag device is joined at joints at both ends. 24. The back portion is formed of two or more members, and one or more joining portions for joining corresponding ends of the two or more members are formed along a vertical direction at an intermediate portion of the back portion. The airbag device for a vehicle seat according to claim 23, wherein the airbag device is provided. 25. A reinforcing sheet having strength equal to or higher than the main portion and elasticity equal to or lower than the main portion is provided at least on a portion corresponding to the airbag module on the back side of the main portion, and a corresponding end of the reinforcing sheet is also provided on the main portion. The airbag device for a vehicle seat according to any one of claims 21 to 24, wherein the airbag device is joined at joints at both ends. 26. The main part is formed of two or more members, and one or more joints for joining corresponding ends of the two or more members are formed along a vertical direction at an intermediate portion of the main part. The airbag device for a vehicle seat according to claim 25, wherein the airbag device is provided. 27. The joining section according to claim 11, wherein the joining section is a sewing section using sewing thread, and a sewing pitch of the joining section is relatively larger than other joining sections as a joining force reducing means. An airbag device for a vehicle seat as described in the above. 28. The joining portion is a sewing portion made of sewing thread, and the strength of the sewing thread at the joining portion is relatively reduced as compared with the sewing thread at another joining portion as the joining force reducing means.
An airbag device for a vehicle seat according to any one of the preceding claims. 29. The method according to claim 1, wherein the main portion and the main side portion are continuously formed as a single piece.
An airbag device for a vehicle seat according to any one of claims 8 to 13. 30. A device according to claim 1, wherein a trim is provided in place of the back portion.
3. The airbag device for a vehicle seat according to claim 2. 31. A seat back is replaced with a seat cushion, a seat back frame is replaced with a seat cushion frame, a main portion covers a central portion of an upper surface of the seat cushion, a main side portion covers both side portions of an upper surface of the seat cushion, and a gusset portion. Covers the side part of the seat cushion,
31. The airbag for a vehicle seat according to any one of claims 1 to 30, wherein a skin material on a lower surface portion of the seat cushion is omitted in place of the back portion, and the airbag of the airbag module is deployed upward. apparatus.