JP3815833B2 - Side airbag device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a side airbag that protects an occupant from a side during a collision.
[0002]
[Prior art]
An airbag device is a device that inflates an airbag and restrains an occupant at the time of a vehicle collision, and generally includes an inflator that is a gas generator, an airbag that is inflated by gas of the inflator, and the airbag and the inflator. An airbag case.
[0003]
The airbag device is not limited to restraining an occupant from the front, and recently , a device restraining the occupant from the side has been developed. Such a side airbag device includes, for example, an airbag module embedded in the door side of a seat back, and the like, and a surface material and a seat surface covering the airbag case opening in the vicinity of the airbag case opening. The covering material to be covered is stitched, and the sewing thread at the stitched portion is broken by breaking the airbag with the deployment pressure of the airbag, and the airbag is deployed from the cleaved gap.
[0004]
[Problems to be solved by the invention]
For this reason, the airbag device is arranged immediately behind the seat covering material. As a result, in the conventional side airbag device, the touch feeling from the seat surface is hard. Had the remaining drawbacks.
[0005]
The present invention addresses the actual situation as described above, and by disposing a seat pad between the side airbag device and the seat covering material and configured to be able to tear the pad , The purpose is to provide a comfortable ride to the seat.
[0006]
[Means for Solving the Problems]
That is, the feature of the present invention the first air bag device adapted to the purpose is to set embedding the airbag device in the vehicle compartment wall side of the fixing member of the seat back, mounting of the sheet in the vicinity of the air bag case opening In a side airbag device in which materials are sewn together and the stitched portion is cleaved by a predetermined deployment pressure of the airbag, the airbag device is directed forward of the vehicle toward the vehicle compartment wall side of the fixing member. And a sheet pad covering the entire airbag case with a predetermined thickness between the airbag case and the cover material, and inside the cover material stitching portion of the pad, and faces the upholstery sewing portion, obliquely forward position relative to the air bag device, the fragile portion allowed to insert the air bag cleaved by deployment pressure of the air bag, the width of the deployment of the airbag Base with a small width, allowed formed by thinning than the surrounding thickness of the pad, the air bag is inserted through the fragile portion cleaved and upholstery sewing unit is characterized in that it is deployed.
[0007]
Then, the Te present invention first airbag odor, upper Symbol fragile portion shaped to a straight or U-shaped and without or ends of these weak portions, circular, T-shaped, the L-shaped or U-shaped Terminal processing is also possible. Similarly, in each airbag device of the present invention, the pad adjacent to the fragile portion can be formed thin near the center of the fragile portion and thick at the end portion. It is also possible to form the pad on the side of the sheet to be formed with a higher hardness than the pad on the other part and to be formed integrally with the pad on the other part. A skin layer of about 30 to 200 μm can be formed on the pad surface around the fragile portion.
[0008]
In yet airbags apparatus of the present invention, the insert material made of cloth or the like on the rear surface of the pad is formed integrally, so as to correspond to the weak portion of the pad, that allowed to form a notch in the insert material Ru also possible der.
[0009]
[Action]
In the airbag device of the present invention, it is possible to provide a side airbag device without impairing the softness and texture of the seat feel. Further, by configuring as in the seventh aspect , the airbag can be inflated and deployed even at the seat back portion in which the insert material is integrally foamed on the back surface. In addition, even in the seat back portion of the urethane foam that does not originally use an insert material, the airbag can be inflated and deployed by integrating the insert material with a notch around the airbag. In general, in pads made of flexible foam, higher rigidity than the surroundings can be obtained by the rigidity of the insert material and the rigidity of the insert material impregnated with the resin of the pad, thereby concentrating stress on the weak part of the pad. It becomes easy to cleave.
[0010]
In addition, since the airbag and the pad do not directly contact with each other, noise due to the contact between the pad and the airbag module is reduced, and the rigidity of the insert material causes the airbag module to lift the pad, for example, so that the seat covering material Ru can be prevented appearance of problems such that Moriagara a.
[0011]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0012]
FIG. 1 is a horizontal sectional view showing an airbag device according to the present invention, FIG. 2 is a perspective view showing a seat back portion taking a cover material, and FIG. 3 is a perspective view showing a state of a seat in which the airbag device is operated. is there. The airbag apparatus of this embodiment includes an inflator 1, an airbag 2, and an airbag case 3, and as shown in FIGS. 1 and 2, a vehicle compartment wall (not shown) of the fixing member 11 of the seat back portion 4 is provided. The airbag device is directly fixed and buried on the vehicle front side, and the airbag is deployed between the occupant and the vehicle compartment wall in an emergency as shown in FIG.
[0013]
In the airbag device, the front cover materials 5 and 6 of the seat 4 are stitched together so as to be joined together as shown in FIG. 1 in front of the opening 3a of the airbag case 3, and the sewing thread 7a of the stitched portion 7 is sewn. Is opened by a predetermined deployment pressure of the airbag 2. A urethane foam 8 is interposed between the airbag case 3 and the outer covering materials 5 and 6 as a seat pad covering the entire airbag case with a predetermined thickness as shown in FIG. Inside the above-described surface covering material stitching portion 7 of the foam 8, facing the surface covering material stitching portion 7, the airbag 2 is opened at an obliquely forward position of the airbag device by the deployment pressure of the airbag 2, and the airbag 2 is inserted as shown in FIG. 3. A fragile portion 10 is formed.
[0014]
The weak portion 10 as shown in FIGS. 1 and 2, the urethane foam 8 from what was a thin comb above ambient with width smaller than the width of the deployment of the airbag. Fragile portion, urethane foam 8 Ru can keep further texture of the sheet so it is continuous without being separated back and forth in this position. Contact name in the present invention embodiment, the shape of the fragile part 10 can be straight, or as shown in FIG. 5, such a U-shape as shown in FIG. Then, the end of the fragile portion 10, circular as shown in FIG. 6 (A), FIG. (B) are shown such T-shaped, FIG. (C) to indicate such L-shape, in Fig. (D) It can also be formed in a U-shape as shown. Further, as shown in FIG. 5E, the thickness of the urethane foam 8 adjacent to the fragile portion 10 can be made thinner near the central portion X of the fragile portion 10 and thicker toward the end portion Y. By these terminal treatments, the urethane foam can be cleaved in a predetermined shape. (Cleavage can be terminated at that position.)
Further, as shown in FIG. 7 , the urethane foam 8 on the side of the sheet on which the fragile portion 10 is formed is formed with higher hardness than the urethane foam 8 ′ on the general part including the opposite side, as the case may be. It can also be integrated. In this case, the side urethane foam 8 is integrally formed with a different hardness foam such as a low molecular weight or a high crosslink. This is effective for suppressing urethane foam 8 and improving occupant holding. Then, above the surface of the fragile portion 10 near urethane foam 8, and molded at the mold at the time of the urethane foam molding as shown in FIG. 8, the mold surface temperature and the foaming pressure, such as about solid skins 30~200μm 9 It is also possible to form the layer 13. This skin layer makes it possible to protect cells (foamed layer) of the urethane foam close to the surface, and enables the urethane foam to be cleaved with a clean cross section.
[0015]
On the other hand, FIG. 10 is a sectional view showing an example of integrally molded insert member 14 to the back surface of the sheet of urethane foam 8, FIG. 10 is identical members respectively corresponding to the configuration of FIG. 1 bear similar reference numerals.
[0016]
In general, the urethane foam 8 of the sheet is often integrally foam-molded with the insert material 14 on the back surface thereof. The purpose of this is to increase the rigidity of the urethane foam 8 and to improve riding comfort, and to prevent abnormal noise due to rubbing between the urethane foam 8 and a metal part such as a seat frame (fixing member).
[0017]
Examples of the insert material 14 include fabrics such as cloth, resin nets, non-woven fabrics, and so on. That is, in FIG. 10 , the insert material 14 is integrally formed on the back surface of the urethane foam 8, and the notch 16 is formed at the position corresponding to the position of the fragile portion 10 of the urethane foam 8. The shape of the cutout portion 16 of the insert material 14 only needs to correspond to the position of the fragile portion 10, and for example, the shape as shown in FIGS. 11 and 12 can be used.
[0018]
Finally, in the airbag device shown in FIG. 10, it is also possible to embed the Fel bets between the urethane foam 8 back surface of the insert member 14. Buried range of Fel metropolitan generally be a storage range of the airbag 2, but can also buried in the airbag case 3 side.
[0019]
Thus, even in the sheet having the insert material 14, by forming the notch 16 in the insert material 14, the airbag can be inflated and deployed in the same manner as the sheet without the insert material. By adopting 14, the rigidity of the insert material 14 impregnated with the resin and solidified can be utilized to concentrate the stress on the fragile portion 10 of the urethane foam 8 and perform the cleavage cleanly. Further, since the airbag 2 and the urethane foam 8 are not in direct contact with each other, abnormal noise due to the contact between the urethane foam 8 and the airbag module is reduced, and the airbag module is made of, for example, the urethane foam 8 by the rigidity of the insert material 14. It is also possible to prevent problems in appearance such as lifting the seat and raising the sheet covering materials 5 and 6. Then, the appearance of the problem can be further improved by embedding the Fel bets like, also, the resin of the urethane foam 8 on the surface such as the Fel preparative impregnates, advantages of the rigidity from solidifying Can be further enhanced. As the substitute of the Fel bets can be used other nonwoven, coarse blankets, polypropylene Nets, slabs, victoria lawn, the Subanbondo like.
[0020]
As mentioned above, although the Example of this invention was described, a weak part can be formed also by the cutting process using a cutter knife, a sander, etc. FIG. The cutting process can be easily performed manually without requiring special equipment, and is suitable for small-scale production. The mold forming is suitable for mass production.
[0021]
【The invention's effect】
As described above, the side airbag device according to the present invention is directly fixed and embedded in the vehicle compartment wall side of the fixing member of the seat back portion toward the front of the vehicle, and between the airbag case and the seat covering material. A seat pad that covers the airbag case main body is interposed at a predetermined thickness , and is located inside the outer surface stitching portion of the pad and opposite to the outer surface stitching portion, and is obliquely forward with respect to the airbag device. The fragile part where the airbag is inserted during deployment is formed by making the pad thickness thinner than the surrounding area with a width smaller than the width of the airbag on the deployment side, and stress is applied to the fragile part when the bag is deployed. together can be cleanly and smoothly perform the cleavage is more focused, by an air bag module which is adjacent to the conventional face material to-covering in the pad, Ya softness of the sheet tactile In which the effect of the can mount the airbag side without compromising fit.
[0022]
Furthermore, even with a sheet having an insert material, by forming a notch in the insert material, the airbag can be inflated and deployed in the same manner as a sheet without the insert material, and by actively adopting the above insert material Because of the rigidity of the insert material impregnated and solidified with resin, it is possible to concentrate the stress on the fragile part of the pad of the seat and to clean it well, and the airbag and the pad are not in direct contact In addition to reducing abnormal noise caused by contact between the pad and the airbag module, the rigidity of the insert material prevents appearance problems such as the airbag module lifting the pad and raising the seat covering material. Ru is possible der.
[Brief description of the drawings]
FIG. 1 is a horizontal sectional view showing an airbag apparatus according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a seat backrest portion excluding a cover material in the same embodiment.
FIG. 3 is a perspective view showing a state of the seat in which the airbag apparatus is activated.
FIG. 4 is a perspective view showing an example of a fragile portion.
FIG. 5 is a perspective view showing another example of a fragile portion.
6 (A) to (D) is a front view showing people respectively the shape of the distal end of the fragile portion is a front view showing the (E) thickness.
FIG. 7 is a perspective view showing an example in which side pads are formed of different hardness foam.
FIG. 8 is a cross-sectional view showing an example of forming a pad.
FIG. 9 is a cross-sectional view showing a skinned foam.
FIG. 10 is a sectional view showing a side airbag device of the present invention having an insert material.
FIG. 11 is a cross-sectional view showing an example of a notch portion of the insert material.
FIG. 12 is a cross-sectional view showing another example of the notch portion of the insert material.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Inflator 2 Air bag 3 Air bag case 3a Air bag case opening part 4 Seat backrest part 5 Air bag case side surface covering material (seat side part side)
6 Seat side cover (seat seating side)
7 Sewing part 7a Sewing thread 8 Urethane foam 10 Fragile part 11 Fixing member 13 Skin layer 14 Insert material 16 Notch part

Claims (7)

To set embedding the airbag device in the vehicle compartment wall side of the fixing member of the seat back, and sutured to seaming upholstery together sheets in the vicinity of the air bag case opening, a predetermined air bag the suture portion In the side airbag device to be cleaved by the deployment pressure, the airbag device is directly fixed to the vehicle compartment wall side of the fixing member toward the front of the vehicle, and a predetermined thickness is provided between the airbag case and the covering material. Now, while interposing a seat pad that covers the entire airbag case, inside the surface material stitching portion of this pad and facing the surface material stitching portion, at an obliquely forward position relative to the airbag device , Form a fragile part that can be punctured by the airbag deployment pressure and inserted through the airbag by making the pad thickness smaller than the surrounding area with a width smaller than the width of the airbag deployment side. Because the air bag device for a side, characterized in that the air bag is inserted through the fragile portion cleaved and upholstery sewing unit is deployed. The fragile portion shaped straight or U-shaped with an air bag device for a side portion of claim 1 Symbol placement made a. The side airbag device according to claim 2 , wherein the end of the fragile portion is subjected to terminal processing in a circular, T-shaped, L-shaped or U-shaped shape. The side airbag device according to any one of claims 1 to 3 , wherein the pad adjacent to the fragile portion is formed to have a thin thickness near the center of the fragile portion and a thick end portion. The side according to any one of claims 1 to 4 , wherein the pad on the side of the sheet on which the fragile portion is formed is formed with higher hardness than the pad on the other portion and is formed integrally with the pad on the other portion. Airbag device for the department. The side airbag device according to any one of claims 1 to 5 , wherein a skin layer having a thickness of about 30 to 200 µm is formed on a pad surface around the fragile portion. An airbag device is embedded in the vehicle compartment wall side of the fixing member of the seat back portion, and is sewn so that the cover materials of the vehicle compartment wall side seat are joined together in the vicinity of the airbag case opening. In the side airbag device to be cleaved by a predetermined deployment pressure, the airbag device is directly fixed to the vehicle compartment wall side of the fixing member toward the front of the vehicle, and between the airbag case and the covering material. A sheet pad having a predetermined thickness and covering the entire airbag case is interposed, and an insert material made of cloth or the like is integrally formed on the back surface of the pad. At the position facing the cover material stitching part, the fragile part that is torn by the deployment pressure of the airbag and allows the airbag to be inserted is smaller than the width on the deployment side of the airbag, and the pad thickness The air bag is deployed by forming a notch portion in the insert material so as to correspond to the fragile portion of the pad, and inserting the cleaved fragile portion and the cover material stitching portion. A side airbag device characterized by the above .

Images