JPH0986326A - Air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air bag device which can be disposed at both the sides of a seat back, and can make the parts of the air bag device common. SOLUTION: The air bag device is equipped with a bag shaped air bag 11 where a vent hole 14 is disposed, which exhausts gas having flown in when the air bag is expanded, and with an inflator 16 expanding the air bag 11. The air bag 11 has its shape expanded roughly in a rectangular parallelopiped shape toward the forward side, and concurrently is expanded in a symmetric form on the right and left about its rear center while the vent hole 14 and its mounting hole 13 are disposed at the center in the right and left directions on the rear end side when the air bag is expanded. The inflator 16 is disposed at the central area on the inner side of the rear end face 11a of the air bag when the air bag is expanded. A mounting bracket 18 holding the inflator 16, holds the periphery of the mounting hole 13, and fixedly mounts the inflator 16 together with the air bag onto the frame of a seat back.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag device for arranging an inflated airbag on the side of an occupant in a vehicle, and more particularly to an airbag device which can be arranged on the left side or the right side of a seat back.

[0002]

2. Description of the Related Art A conventional airbag device of this type has a bag-shaped airbag that is folded and stored, and an inflator that discharges gas for inflating the airbag.

[0003] For example, when the vehicle is placed on the rear seat, the seat back (the seat back of the seat) which is the vehicle outer side of the vehicle on the left side (the left side when the front side is viewed from the rear side of the vehicle). Part) on the left side and the right side seat on the right side of the seat back, which is on the outside of the vehicle (see Japanese Patent Laid-Open No. 4-50052 and Japanese Utility Model Laid-Open No. 58-130850). ).

[0004]

However, in the conventional airbag apparatus of this type, the structure arranged on the left side of the seat back and the structure arranged on the right side of the seat back are
It was different.

That is, in the conventional airbag, the vent hole for discharging the gas flowing in at the time of inflation is arranged outside the vehicle of the vehicle at the time of inflation, and the airbag is in a direction orthogonal to the inclination direction of the seat back. This is because it does not project to the side, but projects at an angle, so that it cannot be used for the airbag device arranged on the other side even if the left and right are reversed or the top and bottom are reversed.

Further, not only the position of the vent hole but also the position of connection with the inflator is arranged according to the position of the seat back, and the airbag to be arranged on one side is arranged on the other side. It could not be used for the device.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an airbag device which can be arranged on both left and right sides of a seat back so that parts of the airbag device can be shared. To do.

[0008]

An airbag device according to the present invention comprises a bag-shaped airbag which is folded and accommodated and in which a vent hole is arranged, and an inflator for inflating the airbag. An airbag device that can be arranged on both left and right sides of the back, wherein the airbag comprises:
The shape when inflated is a substantially rectangular parallelepiped shape that swells to the front side of the seat back, and the rear end side in which the vent hole and the mounting hole are arranged at the center of the rear end side when inflated in the left-right direction is centered. The left and right are symmetrical, and the inflator is
A mounting bracket, which is arranged at the inner center portion of the rear end surface of the airbag when inflated, holds the inflator, holds the periphery of the mounting hole, and attaches the inflator together with the airbag to the frame of the seatback. It is characterized by being fixed.

[0009]

In the airbag device according to the present invention, the airbag has a substantially rectangular parallelepiped shape that inflates to the front side of the seat back when inflated, and has a vent in the left-right center of the rear end side when inflated. The shape is left-right symmetric with the rear end side having a hole and a mounting hole as the center. The inflator is arranged at the inner center portion of the rear end surface of the airbag when inflated, and the mounting bracket that holds the inflator holds the periphery of the mounting hole of the airbag, and the inflator together with the airbag serves as a frame of the seatback. It is attached and fixed.

That is, since the airbag is symmetrical with respect to the rear end side, even if the airbag is arranged on the left side surface or the right side surface of the seat back, an inflator or a mounting member is installed at the center of the rear end side in the horizontal direction. Together with the arrangement of the brackets, the brackets can be inflated into a substantially rectangular parallelepiped shape without any trouble.

Furthermore, if the front end surface side of the airbag is folded, it can be inflated so as to project to the front side when inflated. Therefore, even if the folding method is the same in the airbag devices arranged left and right, The airbag can be inflated without any trouble.

Therefore, in the airbag device according to the present invention, the airbag is symmetrical with respect to the rear end side even if the airbag device is arranged on both left and right sides of the seat back. Since the inflator and the mounting bracket are arranged at the center in the left-right direction of the seat bag, the inflator and the mounting bracket can be operated without any trouble, and the parts can be shared when the seat bag is arranged on both the left and right sides.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

The airbag device 10 of the embodiment is shown in FIG.
As shown in FIG. 2, it is arranged on the left side surface of the seat back 3 in the seat 1 including the seat portion 2 of the vehicle and the seat back 3.

On the left side surface of the seat back 3, a housing recess 4a extending vertically is formed in a body 4 made of urethane material or the like, and the upper surface of the housing recess 4a on the rear side of the vehicle is tilted backward. Thus, the frame 5 extending substantially vertically is arranged. Mounting holes 5a are formed at two predetermined positions of the frame 5. Further, a skin 6 made of a decorative cloth or the like is arranged on the outer surface side of the seat back 3. The outer skin 6 is sewn together with a suture 7 at the front side of the storage recess 4a so that the ends of the cut outer skin 6 can be easily broken when the airbag 11 to be described later is inflated. The seam 6a is formed.

The airbag device 10 includes an airbag 11,
The inflator 16 and the cover 27 are provided.

As shown in FIGS. 1 to 4, the airbag 11 has a substantially rectangular parallelepiped shape which is inflated toward the front side slightly above the direction orthogonal to the inclination direction of the frame 5 of the seat back 3. A vent hole 14 is formed below the center in the left-right direction of the rear end face 11a at the time of expansion, and two mounting holes 13 and 13 are provided above and below the vent hole 14 at the center of the rear end face 11a at the time of expansion. Are formed. The airbag 11 has a shape when inflated, which is symmetrical with respect to the center of the rear end surface 11a in the left-right direction. The vent hole 14 is formed by linearly cutting like a slit.

The manufacture of the airbag 11 will be described.
As shown in the lower part of FIG. 5, first, the base fabric 12 made of a woven fabric such as polyamide or polyester is cut into a predetermined shape, and mounting holes 13 are bored in the center.

Then, as shown in the middle of FIG. 5, the bent hole is folded in two and the peripheral edge is sewn with a suture thread 15, and a part of the fold is cut to form a vent hole 14.

Then, as shown in the upper part of FIG. 5, the airbag 11 can be manufactured by turning it over using the vent hole 14.

The inflator 16 has a substantially columnar shape with the gas discharge port 16a arranged on the front side of the upper end, and is arranged at the inner center portion of the rear end surface 11a of the airbag 11 when inflated. Further, a lead wire 17 for inputting an electric signal at the time of gas generation is connected to the lower end of the inflator 16, and the lead wire 17 is the vent hole 1 of the airbag 11.
4 and is connected to a connector (not shown) that is electrically connected to the airbag operating circuit.

Two mounting brackets 18 are vertically fixed to the inflator 16. Each mounting bracket 18 is made of a sheet metal and has a sleeve welded to project the bolt 20 in the radial direction. 19,
Cushion material 21 fixed to the inner peripheral surface of the sleeve 19
And are provided. The mounting and fixing of these mounting brackets 18 to the inflator 16 is performed by the sleeve 1
The inner diameter of 9 is larger than the outer diameter of the inflator 16, and the cushion member 21 is interposed between the sleeve 19 and the sleeve 19.
Is mounted on the inflator 16, and the sleeve 19 is caulked so as to partially reduce the diameter.

The bolts 20 of the mounting brackets 18 fixed to the inflator 16 are inserted through the mounting holes 13 of the airbag 11, pass through the spring nut 25 and the bracket 27b of the cover 27, and then the mounting holes of the frame 5. 5a is inserted and the nut 29 is screwed.

The cover 27 is made of synthetic resin and has a rectangular main body 27a for covering the side surface of the seat back main body 4,
Bracket 2 that bends in the orthogonal direction from the end of the main body 27a
7b, and two mounting holes 27c through which the respective bolts 20 are respectively inserted are formed in the bracket 27b.

Further, in the airbag device 10 of the embodiment, a thin film 23 such as a rupturable heat-shrinkable film covers the folded airbag 11 in order to prevent the collapse.

Assembling of the airbag device 10 of the embodiment will be described. An inflator 16 to which each mounting bracket 18 is attached and fixed is inserted into the airbag 11 manufactured as shown in FIG. 5 using the vent hole 14. To do.

Next, the bolts 20 are projected from the mounting holes 13 of the airbag 11, and the bolts 2 are
The spring nut 25 is fitted to the outside of the airbag 1
The peripheral edge of each mounting hole 13 of 1 is pressed down. In addition, the lead wire 17 connected to the inflator 16 is connected to the vent hole 1
I'll start with 4.

After that, the front side of the inflator 16 in the airbag 11 is folded and the heat-shrinkable film 23 is formed.
Is wrapped and the folded airbag 11 is wrapped with the film 23 together with the inflator 16 by applying heat. The bolts 20 and the lead wire 17 are formed by breaking a part of the film 23.

Then, each bolt 20 is attached to the bracket 27.
When the nuts 29 are screwed into the bolts 20, the mounting brackets 18 press the peripheral edges of the mounting holes 13 to insert the mounting holes 27c into the mounting holes 27c of the frame 5 and the mounting holes 5a of the frame 5, respectively. The airbag device 10 including the inflator 16 and the cover 27 can be attached to the frame 5.

In the assembly of the airbag device 10, when the inflator 16 is inserted into the airbag 11, the airbag 11 is folded into a predetermined shape, the airbag 23 is wrapped with the film 23, and then the vent hoe 14 is inserted.
Of the mounting bracket 1 by breaking the film 23 of the part of FIG. 2 and utilizing the broken part of the film 23 and the vent hole 14.
The inflator 16 to which 8 is fixed may be inserted into the airbag 11. Also in this case, the tip of each bolt 20 is projected from the film 23, and the end of the lead wire 17 is also projected outward through the vent hole 14.

After the air bag device 10 is assembled and attached to the frame 5, the seat back body 4 is covered with the outer skin 6, the completed seat 1 is mounted on the vehicle, and the end of the lead wire 17 is connected to a predetermined connector. You can do it.

In the airbag apparatus 10 according to the embodiment, after the seat 1 is mounted on the vehicle, if an electric signal for gas generation is input to the inflator 16 via the lead wire 17, the inflator 16 operates as a gas. Discharge port 16a
The gas is discharged from the air bag 11 and
And the outer skin 6 are broken, and the main body 27 of the cover 27
When a is opened, it greatly expands as shown by the chain double-dashed line in FIGS.

Therefore, the airbag device 1 according to the embodiment.
At 0, the airbag 11 is symmetrical with respect to the center of the rear end surface 11a in the left-right direction.
The inflator 16 and the mounting bracket 18 are arranged at the center of the rear end surface 11a of the first embodiment. Therefore, as shown in FIG. 6, the cover 27 can be arranged on the right side surface of the seat back 3 only by reversing the cover 27 left and right and arranging the airbag 11, the inflator 16 and the like as they are. When the gas is discharged from the inflator 16, the airbag 11 can be inflated symmetrically with the state shown in FIG. 2, so that when the airbag device 10 is arranged on the left side or the right side of the seat bag 3. All parts can be shared.

Further, in the airbag device 10 of the embodiment, the lead wire 17 for inputting the electric signal for gas generation to the inflator 16 arranged in the airbag 1.
However, since the lead wire 17 of the inflator 16 does not have to be passed through the insertion hole provided separately in the airbag 11, it is wired through the vent hole 14 of the airbag 11. Therefore, the airbag 11 can be easily manufactured. By the way, in the conventional airbag, when the inflator is arranged inside the airbag, the vent hole is arranged outside the vehicle when the airbag is inflated, and the lead wire is inserted through the vent hole. Since the lead wire regulates the inflation of the airbag, it is necessary to separately provide an insertion hole for the lead wire in the airbag, which is troublesome to process.

In the embodiment, the folded airbag 1 is arranged so that the side surface of the seat back 3 feels good.
Although a cover 27 that covers a part of 1 is used,
Even when the cover 27 is not used, the airbag devices 10 can be arranged on the left and right sides of the seat back 3, as a matter of course.

Further, in the embodiment, the case where the substantially entire circumference of the folded airbag 11 is covered with the film 23 so that the airbag 11 does not collapse before being attached to the seat back 3 has been described. Alternatively, a rupturable band that partially wraps the folded airbag 11 may be used, and if the airbag 11 does not easily collapse, the film 23 or band may not be used.

Further, in the embodiment, the structure in which the inflator 16 is completely housed inside the airbag 11 is shown. However, the airbag device 30 shown in FIGS.
Like the mounting holes 33, 34 on the rear end side of the airbag 31.
The inflator 36 may be configured to project from the above.

The airbag 31 of the airbag device 30
As shown in the lower stage of FIG. 9 when inflated, has a tubular portion 31a on the rear end side, and the upper and lower ends of the tubular portion 31a are mounting holes 33 and 34. Further, the vent hole 35 is arranged near the attachment hole 34 on the rear end side of the airbag 31.

In manufacturing the airbag 31, as shown in the upper part of FIG. 9, first, the rectangular main body portions 32a and 32a are formed.
a, a tubular portion forming portion 32b, and connecting portions 32c, 32c for connecting the main body portion 32a and the tubular portion forming portion 32b,
After the base cloth 32 is cut into a predetermined shape so as to be arranged, the base cloth 32 is folded in two, and the main body portion 32 except for the connecting portion 32c side.
If the outer peripheral edges of the a and 32a are sewn together, the non-sewn portion is turned over, the vent hole 35 is removed, and the suture thread 36 is used to sew the outer peripheral edges of the connecting portions 32c and 32c. The airbag 31 can be manufactured. In addition, the vent hole 35 is formed by connecting portions 32c and 32c.
Will be formed on the outer peripheral edge of the non-sewn part.

The airbag 3 manufactured in this way
1 is bilaterally symmetric with the center in the left-right direction on the rear end face 31b side as the center.

Further, in this airbag device 30, the mounting bracket 39 for holding the airbag 31 and the inflator 37 is fitted on the upper and lower ends of the cylindrical sleeve 40 capable of covering substantially the entire length of the inflator 37. It is composed of caps 41 and 42 to be combined.
The sleeve 40 is provided with a plurality of gas circulation holes 40a so that the gas generated from the inflator 37 can flow out to the front side of the airbag 31.

The inflator 37 has a gas discharge port 37b.
And a large diameter portion 37d formed at the lower end of the main body 37a, and a large diameter portion 37d.
d is a lead wire 3 for inputting an electric signal when gas is generated.
8 is connected.

One of the caps 41 constituting the mounting bracket 39 has an insertion hole 41a into which the male screw portion 37c of the inflator 37 is inserted, and a flange portion 41b having an outer diameter substantially equal to the outer diameter of the sleeve 40 on the outer peripheral edge. Is equipped with. The other cap 42 is an inflator 37.
The main body 37a can be inserted and the large diameter portion 37d cannot be inserted, and an inner diameter insertion hole 42a is provided, and a flange portion 42b having an outer diameter substantially equal to the outer diameter of the sleeve 40 is provided on the outer peripheral edge.

In the mounting bracket 39, the sleeve 40 is inserted into the tubular portion 31a of the airbag 31, and the peripheral edges of the mounting holes 33, 33 of the airbag 31 are bent toward the inner peripheral surface of the sleeve 40. While pressing the peripheries of the mounting holes 33, 34 of the cap 41, 42 with the collar portions 41b, 42b of the caps 41, 42, the caps 41, 42 are fitted into the sleeve 40, and the male screw portion 37c of the inflator 37 is inserted from the cap 42 side to insert the cap 41. Through the insertion hole 41a of
When the nut 43 is screwed into the male screw portion 37c, the airbag 31 and the inflator 37 are held.

In this holding mode, the airbag 31
Fold and cover with film 23, cap 41.4
The airbag 31 and the inflator 37 are attached to the case 45 by bolting a not-shown tongue protruding from 2. In addition, the lead wire 38 breaks the film 23 and is projected. Also,
The case 45 has a bracket (not shown), and is bolted to the frame 5 of the seatback 3 using this bracket. Furthermore, the case 45 is
The cover 46 covering the folded airbag 31 is attached by locking the periphery of a predetermined number of locking holes 46a with locking claws 45a.

In this airbag device 30, the cap 4
1, 42, the case 45, and the cover 46 cannot be shared, but the airbag 31, the inflator 37, and the sleeve 40 are symmetrical with respect to the rear end side. Therefore, the airbag 31, the inflator 37 ,. The sleeve 40 of the mounting bracket 39 can be shared between the left side and the right side of the seat back 3.

[Brief description of drawings]

FIG. 1 is a side view of a seat showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the same embodiment, showing a II-II portion in FIG.

FIG. 3 is a left side view of the airbag device of the same embodiment.

FIG. 4 is a front view of the airbag device of the same embodiment as seen from the rear end face side.

FIG. 5 is a diagram illustrating a manufacturing process of the airbag of the embodiment.

FIG. 6 is a lateral cross-sectional view of the airbag device of the same embodiment, which is arranged on the right side of the seat back.

FIG. 7 is a cross-sectional view of another embodiment.

FIG. 8 is a vertical cross-sectional view of the same embodiment.

FIG. 9 is a diagram illustrating a manufacturing process of the airbag of the embodiment.

[Explanation of symbols]

 3 ... Seat back, 5 ... Frame, 10/30 ... Air bag device, 11/31 ... Air bag, 11a / 31b ... Rear end surface, 13/33/34 ... Mounting hole, 14/35 ... Vent hole, 16/37 … Inflator, 18 ・ 39… Mounting bracket.

Claims (1)

[Claims] 1. An airbag device which includes a bag-shaped airbag that is folded and accommodated and has vent holes arranged therein, and an inflator that inflates the airbag, and can be arranged on both left and right sides of a seat back. The airbag has a substantially rectangular parallelepiped shape that swells to the front side of the seat back when inflated, and the vent hole and the mounting hole are arranged at the center in the left-right direction on the rear end side when inflated. With a symmetrical shape centering on the rear end side, the inflator is arranged at an inner center portion of the rear end surface of the airbag when inflated, and a mounting bracket that holds the inflator holds the periphery of the mounting hole. The airbag device is characterized in that the inflator is attached and fixed to the frame of the seat back together with the airbag.