JP2000016224A - Airbag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate assembly of an airbag to a seat. SOLUTION: A case 20 includes an opening plate 21 which protrudes outwards and locking grooves 24a, 24b are formed at the first side 211 serving as the open end side of a door 30. The latch grooves involve the wider first grooves 241a, 241b and the narrower second grooves 242a, 242b following the first grooves. Locking members 33a, 33b which extend to the open end side roughly vertically are formed on the door 30. V-shaped grooves 333a, 333b are formed on the locking members 33a, 33b and claws 332a, 332b are mounted on the front end part thereof. The claws 332a, 332b are inserted from the first grooves 241a, 241b, and the door 30 is moved in the D-axis direction, so that the door 30 is locked to the case 20. Fixed bolts 31a, 31b on fixed end sides are inserted from the side of recessed parts 34a, 34b, and nuts 35a, 36b are screwed, so that the door 30 and the case 20 are fixed.

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 protecting an occupant from an impact at the time of a vehicle collision, and more particularly to an airbag device characterized by a structure for mounting a door to a case.

[0002]

2. Description of the Related Art An airbag device described in Japanese Patent Application Laid-Open No. 9-315257 is known as a so-called side airbag device for protecting an occupant from an impact in a side collision of a vehicle. This airbag device
The sheet is attached to the sheet as follows in a later step of manufacturing the sheet. A back frame, which is a reinforcing member for the seat, is provided on the back of the seat back, and a side bracket is welded to the back frame. In the portion where the side bracket is provided, there is no pad which is a cushion material of the seat and no skin, and the side bracket is exposed from the seat. The airbag device after the door to be opened and the base are assembled to the exposed side bracket is fixed using bolts and nuts.

[0003]

However, in the conventional airbag device, since the integrated device in which the door is assembled to the base only needs to be attached to the side bracket, the assembling process when assembling the door to the base is simplified. No special consideration was needed. In the case of Japanese Patent Application Laid-Open No. 9-315257, rebed fastening is performed at the front end on the open side and the rear end on the side that is not open, resulting in an increase in manufacturing man-hours and an increase in cost. In addition, it is necessary to process the sheet to expose the side brackets, which impairs the appearance of the sheet.

The present invention has been made to solve the above-mentioned problems, and a first object of the present invention is to make it easy to assemble an airbag device to a seat. The second purpose is to keep the appearance of the sheet from being impaired. A third object is to reduce manufacturing costs.

[0005]

According to the first aspect of the present invention, a case accommodating the inflator and the airbag, fixed to the vehicle body side, and functions as a lid for the case and deploys the airbag. A door that is sometimes opened, and the door is provided with a locking member protruding toward the case,
The case has a locking groove where the locking member is inserted and locked, so the door can be easily assembled to the case simply by inserting the locking member of the door into the locking groove of the case. Becomes Therefore, assembling of the airbag device becomes easy, and since the door is fixed by the locking mechanism, the manufacturing cost is reduced.

According to the second aspect of the present invention, the position of the locking member in the door is set to the side that is opened when the airbag is deployed, so that the locking member is engaged when the airbag is deployed. Can be easily released.
The door can be easily opened by using the other end as a hinge.

According to the third aspect of the present invention, at the side of the door opposite to the side where the locking member is provided, the door is not opened even when the airbag is deployed.
Since the door is fixed to the case by the fixing means, the door can be opened by using this fixed portion as a hinge mechanism.

According to the fourth aspect of the present invention, the claw having a corner portion to be locked to the locking groove is formed at the tip of the locking member. The door can be easily attached to the case by the locking mechanism.

According to the fifth aspect of the present invention, the locking groove has a wide first groove portion into which the claw of the locking member is inserted, and a narrow second groove portion continuous with the first groove portion and into which the claw is not inserted. The door is easily inserted into the case by inserting the locking member of the door into the first groove and sliding the door with respect to the case so that the locking member is positioned in the second groove. Can be locked.

According to the sixth aspect of the present invention, the locking groove is formed in the opening plate formed substantially parallel to the opening surface on the side peripheral portion of the opening of the case. Can be brought into contact with each other, and a mechanism with good attachment properties can be obtained. Further, since the door is in contact with the opening plate, the door can sufficiently withstand the force of pressing the door against the case, and the durability can be improved.

According to the means of claim 7, the fixing means is a bolt penetrating the hole formed in the door and the hole formed in the opening plate of the case and a nut screwed to the bolt. The door can be firmly fixed to the case, and the side on the fixed side of the door can be a hinge mechanism, so that the door can be easily and reliably opened.

According to the eighth aspect of the present invention, since the locking member is formed with a fragile portion that facilitates breaking when the airbag is deployed, it is easily broken at the fragile portion when the airbag is deployed. The door can be reliably opened.

According to the ninth aspect of the present invention, since the fragile portion is formed to be thin, the thin portion can easily be broken when the airbag is deployed.

According to the tenth aspect of the present invention, the fragile portion is formed to be thin by a groove such as a U-shape, a V-shape, a rectangle, an arc, etc., so that the fragile portion can be easily formed.

According to the eleventh aspect, the case is buried on the side of the backrest of the seat on which the occupant sits,
Since the outer shape of the sheet is not changed, the appearance of the sheet is not spoiled. Further, the sheet is completed in a state where the case is incorporated in the sheet. And in a later step,
Since the door is merely attached to the case, the seat is extremely easy to assemble.

According to the twelfth aspect of the present invention, the outer skin of the sheet is locked to the opening plate formed substantially parallel to the opening surface on the side periphery of the opening of the case. It can be done easily. Further, since the opening plate is covered with the door, the locking portion at the end of the skin cannot be seen from the outside, so that the aesthetic appearance of the seat is not impaired.

According to the thirteenth aspect of the present invention, since the case is fixed to the vehicle body using the mounting bolt fixed to the inflator, the airbag and the case are fixed by the inflator to the fixed portion on the vehicle body. As a result, the number of fixing components can be reduced. Further, since the fixing portion of the airbag device is not exposed to the outside of the seat, safety can be ensured and the appearance is not impaired.

[0018]

Embodiments of the present invention will be described below. The present invention is not limited to these modes. The airbag device 10 of the present embodiment is attached to a vehicle seat 60 as shown in FIG. The seat 60 includes a seat portion 61, a backrest 62, and a headrest 63. The airbag device 10 is embedded and fixed in the backrest 62.

FIG. 9 shows a seat 60 of the airbag device 10.
2 shows an attachment structure to the camera. The backrest 62 of the seat 60 has a pad 65 as a cushion material and a skin 66 covering the surface thereof, and seat frames 64 are arranged on both sides in the height direction. The portion of the seat frame 64 to which the airbag device 10 is fixed does not have the pad 65, so that a space for embedding the airbag device 10 is formed.

The inflator 50 is provided in the airbag 53, and mounting bolts 51a fixed to the inflator 50 penetrate the airbag 53, the case 20, and the seat frame 64, and the nut 52a is screwed into this mounting bolt 51a. With this structure, the airbag 53, the case 20, and the seat frame 64 are fastened together by the inflator 50 and the nut 52a. Thus, the airbag device 10 is fixed to the seat frame 64. Although FIG. 9 shows one set of the mounting bolts 51a and the nuts 52a, another set of the mounting bolts 51b and the nuts 52b is arranged in the height direction, that is, at a lower position perpendicular to the plane of FIG. Exists.

The opening plate 21 of the case 20 has a skin 6
6 is formed with a locking groove 22. A hook 67 is fixed to an end of the skin 66, and the hook 67 is locked in the locking groove 22, so that a terminal treatment of the skin 66 around the case 20 is performed. As described above, the door 30 is fixed to the opening plate 21 of the case 20 so as to close the opening of the case 20 embedded and fixed in the backrest 62 of the seat 60. In this state,
The terminal processing portion of the skin 66 is covered with the door 30 and cannot be seen from the outside. Therefore, the appearance of the sheet 60 is not impaired.

Next, the detailed structure of the airbag device 10 will be described. As shown in FIG.
Reference numeral 0 denotes a case 20 and a door 30. The case 20 is made of, for example, metal, and the door 30 is made of a thermoplastic resin.
An airbag 53 enclosing an inflator 50 (shown in FIG. 9), folded into a predetermined shape, and wrapped with a wrap cloth 54 is provided in the case 20. Holes 23a and 23b are formed at the bottom of the case 20, and these holes 23a and 23b are formed.
The mounting bolts 51a and 51b described above penetrate through b.

The case 20 has an opening plate 21 formed around the opening 27 and protruding outward parallel to the surface of the opening 27. Engagement grooves 24a and 24b for attaching the door 30 are formed on the first side 211 of the opening plate 21 which is the open end side of the door 30. The locking grooves 24a, 24b are respectively formed with a wide first groove 241a, 241b and a narrow second groove 241a, 241b.
It has grooves 242a and 242b. Second groove 242a
And the second groove 242b are both formed on the same side of the wide first groove 241a and the first groove 241b, that is, in the D-axis direction.

The second side 212 of the opening plate 21 on the hinge side of the door 30 has holes 2 through which fixing bolts 31a and 31b for firmly fixing the door 30 penetrate.
5a, 25b and grooves 26a, 26b through which locking members 321a, 321b of caps 32a, 32b described later penetrate.
Are formed. In FIG. 1, 25b, 321
b and 26b are not shown because they are shaded.

In the hinge 30 of the door 30,
The strip-shaped reinforcing member 55 extending in the D-axis direction is
3 is fixed to the second side 212 of the opening plate 21.

The door 30 is provided with locking members 33a, 33b extending substantially perpendicular to the surface of the door 30 on the side that is the open end when the airbag 53 is deployed.
The locking members 33a and 33b have D
V-shaped grooves 333a and 333b extending in the axial direction are formed. Also, a claw 332a having right-angled corners 331a, 331b at the tip of the V-shaped grooves 333a, 333b.
332b is provided.

The width of the first grooves 241a and 241b formed in the opening plate 21 of the case 20 is determined by the locking members 33a and
The width of the second grooves 242a and 242b is set to be large enough to penetrate the claws 332a and 332b at the tip of the
32a and 332b cannot be penetrated. By inserting the claws 332a, 332b of the locking members 33a, 33b from the first grooves 241a, 241b and moving the door 30 in the D-axis direction, the corners 331a, 331b of the locking members 33a, 33b become second grooves 242a. , 242 b, so that the door 30 is not detached from the case 20.

On the hinge side of the door 30, the heads 311a, 311 of the fixing bolts 31a, 31b as fixing means are provided.
b are formed at the bottom of the recesses 34a, 34b.
b is formed. The claws 332a and 332b are
42a and 242b, the door 30 is locked.
The holes 341a and 341b formed at the center, the holes 551a and 551b formed at the reinforcing member 55, and the holes 25a and 25b formed at the opening plate 21 of the case 20 have the same centers. In this state, the fixing bolts 31a and 31b are
Nuts 35a and 35b, which are fixing means, are screwed into the fixing bolts 31a and 31b from the back side of the opening plate 21 respectively. Thereby, the door 30 is firmly fixed to the case 20, and the side on the fixed side serves as a hinge.

Caps 32a and 32b are provided to cover the heads 311a and 311b of the fixing bolts 31a and 31b provided in the recesses 34a and 34b. The caps 32a and 32b have claws 322b (FIG. 9) that engage with convex portions (not shown) formed on the side walls of the concave portions 34a and 34b.
The front surfaces of 2a and 32b are positioned and fixed at the same height as the front surface of the door 30. The caps 32a and 32b are provided with locking members 321a and 321b extending long in the direction of the case 20.
Pass through grooves (not shown) formed at the bottoms of the concave portions 34a and 34b and grooves 26a and 26b formed in the opening plate 21. Then, the caps 32a and 32b are
a, 34b, the claw 323a, 323b (323b is shown in FIG. 9) at the tip of the locking member 321a is in the groove 2
6a, 26b, the cap 32
a and 32b do not scatter from the door 30.

Next, the seat 60 of the airbag device 10 will be described.
A method of assembling the components will be described. First, the airbag 53 containing the inflator 50, folded, and wrapped by the wrap cloth 54 is stored in the case 20 so that the mounting bolts 51a, 51b project from the holes 23a, 23b (FIG. 1). The case 20 in which the airbag 53 is housed as described above is mounted on the backrest 6 by the mounting bolts 51a and 51b.
The second seat frame 64 is attached so as to pass through a hole formed in the seat frame 64 (FIG. 9). Next, the mounting bolts 51a,
The nuts 52a and 52b are screwed into the case 51b,
0 is fixed to the seat frame 64 (FIG. 9).

Next, the hook 67 at the end of the skin 66 is locked in the locking groove 22 of the opening plate 21. Thus, case 20 is fixed to backrest 62 of seat 60 (FIG. 9).

Next, the door 30 is attached so as to cover the opening 27 of the case 20 (FIGS. 1 and 9). First, door 3
0 locking members 33a, 33b
Inserted into the grooves 241a, 241b, the claw 332a, 3
32b is located on the back surface of the first grooves 241a and 241b. Next, the door 30 is slid in the D-axis direction so that the claws 332a and 332b are in the second grooves 242a and 242.
b. In this state, the nail 332
a, 332b cannot pass through the second grooves 242a, 242b, and the door 30 is locked to the case 20. The operation mechanism in which the locking member 33a is locked in the locking groove 24a in this case is described in detail in FIG. As shown in FIG. 2A, the claw 332a is inserted into the wide first groove 241a.
Insert in the C-axis direction, as shown in FIG.
The corner 331a of a is positioned on the back surface of the aperture plate 21. In this state, as shown in FIG. 2C, the claw 332a is slid in the D-axis direction to reduce the angle 331a of the claw 332a to the second width.
It is located on the back surface of the groove 242a. In this state, the nail 332a
Does not fall out of the second groove 242a.

Next, using the fixing bolts 31a and 31b and the nuts 35a and 35b, the door 30, the reinforcing member 5
5. The case 20 is fastened together (FIG. 1). Thus, the door 30 can be easily attached to the case 20 attached to the seat 60 in a later step of attaching the case 20. Thereafter, the caps 32a, 3b are covered so as to cover the heads 311a, 311b of the fixing bolts 31a, 31b.
2b (FIG. 1). In this manner, the door 30 can be fixed to the case 20, as shown in FIG.
FIG. 4 is a sectional view taken along the line IV-IV in FIG. Nail 332a
It is understood that the corner 331a is locked to the back surface of the second groove 242a, and the door 30 is not detached from the case 20.
The sheet 60 is located between the surface of the opening plate 21 and the door 30.
The corner 331 in FIG.
The gap between a and the back surface of the aperture plate 21 is eliminated. or,
FIG. 5 is a sectional view taken along the line VV in FIG.

Next, the operation procedure of the airbag device 10 when the airbag 53 is deployed will be described. When a vehicle collision is detected, an ignition signal is applied to the inflator 50. Thus, the gas is injected from the inflator 50, and the airbag 53 is deployed. At this time, the breaking line 541 of the perforation (FIG. 1) is generated by the deployment force of the airbag 53.
As a result, the wrap cloth 54 is broken.

Further, a force acts in the opening direction of the door 30 by the deployment force of the airbag 53, and the locking members 33a, 33
b is broken from the V-shaped grooves 333a and 333b (FIGS. 1 and 4). As a result, the side of the door 30 on which the locking members 33a and 33b are provided is a free end, and the side fixed by the fixing bolts 31a and 31b is a fixed end (hinge) and is opened as shown in FIG. . And
The airbag 53 is deployed from the opening of the door 30 to the outside. The airbag 53 is deployed between the side of the seated occupant and the door of the vehicle in parallel with the door, so that the occupant can be effectively protected from a side collision of the vehicle. still,
FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6, and it is understood that the V-shaped groove 333b of the locking member 33b is broken by the deployment force of the airbag 53. Also, V-shaped grooves 333a, 333
b is located on the door 30 side with respect to the locking grooves 24a, 24b, so that when it breaks at the V-shaped grooves 333a, 333b, the claw 332a, 332b at the tip is shielded by the opening plate 21, so that the vehicle interior There is no scattering.

The airbag device 10 of this embodiment has the following effects. 1) After the case 20 is fixed to the seat frame 64 of the seat 60, the open end side of the door 30 is fixed to the locking member 33a.
Since the fixed end side is fixed by the fixing bolts 31a and 31b, the case 20 of the door 30 is extremely easily attached. 2) Since the case 20 is embedded in the backrest 62 of the seat 60, the appearance of the seat 60 is not spoiled. 3) Since the skin 66 of the sheet 60 is locked in the locking groove 22 of the case 20, the case 20 and the skin 66 can have a sense of unity.
Since the sheet 60 is covered with the sheet 60, the appearance of the sheet 60 is not spoiled. 4) V-shaped grooves 333a, 333 of locking members 33a, 33b
The opening of the door 30 becomes extremely simple because it is easily broken at the fragile portion where b is formed. 5) On the fixed end side of the door 30, a reinforcing member 55 is fixed to the case 20 so as to cover a part of the airbag 53. Therefore, the deployment force of the airbag 53 in this portion is received by the reinforcing member 55, and a large deployment force is suppressed from being applied to the fixed end side of the door 30, so that the door 30 is broken at the fixed end side. Is prevented. 6) The door 30 is supported by the opening plate 21 of the case 20 by the locking members 33a and 33b.
Therefore, the force acting on the case 20 side can be sufficiently received, so that the strength against external force can be improved. Further, the door 30 does not come off except when the airbag is deployed. 7) Fixing bolts 31a, 31b and nuts 35a, 35b
The fixed end of the door 30 is
The door 30 is firmly fixed to the opening plate 21, so that when the airbag is deployed, the door 30 is prevented from separating from the case 20 and scattering. 8) The door 30 has a fixed bolt 3
1a and 31b penetrate through holes 341a and 341b formed in the bottom surfaces of the recesses 34a and 34b of the door 30, and are fixed to the second side 212 of the opening plate 21 by the nuts 35a and 35b. No loosening of the fixing bolts 31a and 31b due to the settling of the door 30 constituted by the above-described method will not occur.

In addition to the above-described embodiment, an airbag apparatus may be modified as follows. 1) The position where the locking members 33a and 33b are provided is provided on the long side where the door 30 is opened, but may be provided near the open side of the short side orthogonal to the long side. The number of locking members and locking grooves is arbitrary. 2) V-shaped grooves 333a, 333 to form weak portions
b, but as shown in FIG.
4, as shown in FIG. 8B, a rectangular groove 335,
A U-shaped groove may be used. 3) By attaching the airbag device to the seat, the seat and the case can be integrally configured, and many effects can be achieved. However, the airbag device having an engagement mechanism between the door and the case is an assistant. It can be provided on the dashboard for seats or on the door for vehicles. 4) A fixing bolt and a nut were used as fixing means.
Riveting or other securing means may be used.

[Brief description of the drawings]

FIG. 1 is an assembled development view showing a configuration of an airbag device according to a specific embodiment of the present invention.

FIG. 2 is an explanatory view showing a method of engaging a locking member in a groove of a case in the airbag device of the embodiment.

FIG. 3 is a perspective view showing a state in which a door is attached to a case in the airbag device of the embodiment.

4 is a cross-sectional view showing a cross section taken along the line IV-IV in FIG. 3 and showing an engagement relationship between a locking member and a locking groove.

FIG. 5 is a cross-sectional view taken along the line VV in FIG. 3, showing a mounting structure using fixing means.

FIG. 6 is a perspective view showing how the door is opened when the airbag is deployed in the airbag device of the embodiment.

FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. 6, showing a state in which the locking member is broken when the airbag is deployed.

FIG. 8 is a cross-sectional view showing another configuration of the fragile portion formed on the locking member.

FIG. 9 is a cross-sectional view showing a state where the airbag device according to the embodiment is attached to a seat.

FIG. 10 is a perspective view showing an attachment position of a seat of the airbag device.

[Explanation of symbols]

 Reference Signs List 10 airbag device 20 case 21 opening plate 24a, 24b locking groove 241a, 241b first groove 242a, 242b second groove 27 opening 30 door 31a, 31b fixing bolt 32a, 32b cap 33a, 33b: locking member 331a, 331b: angle 332a, 332b: claw 333a, 333b: V-shaped groove 50: inflator 51a, 51b: mounting bolt 53: airbag 54: wrap cloth 55: reinforcing member

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Motoki Nakagawa 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Inside Denso Corporation (72) Inventor Kiyoshi Sugimura 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Denso Corporation F-term (reference) 3D054 AA03 AA06 AA14 AA17 AA21 BB09 BB10 BB21 BB23 BB30 EE20 FF02 FF04 FF17 FF20

Claims (13)

[Claims] An airbag device, which is deployed at the time of a vehicle collision and protects an occupant from an impact, includes a case that houses an inflator and an airbag and is fixed to a vehicle body side, and functions as a lid for the case. A door that is opened when the airbag is deployed, wherein the door is provided with a locking member protruding toward the case, and a locking groove in which the locking member is inserted and locked in the case. An airbag device, characterized in that an airbag is formed. 2. The airbag device according to claim 1, wherein the position at which the locking member is disposed in the door is a side edge that is opened when the airbag is deployed. 3. The door is fixed by a fixing means on a side of the door opposite to the side on which the locking member is provided, so that the door is not opened even when the airbag is deployed. The airbag device according to claim 2, wherein the airbag device is fixed to the airbag. 4. A claw having a corner portion to be locked to said locking groove is formed at a tip portion of said locking member. The airbag device according to claim 1. 5. The locking groove includes a wide first groove portion into which the claw of the locking member is inserted, and a narrow second groove portion continuous with the first groove portion and not having the claw inserted therein. The airbag device according to any one of claims 1 to 4, wherein: 6. The locking plate according to claim 4, wherein said locking groove is formed in an opening plate formed substantially parallel to an opening surface on a side peripheral portion of an opening of said case. Airbag equipment. 7. The fixing device according to claim 1, wherein the fixing means comprises a bolt passing through a hole formed in the door and a hole formed in the opening plate of the case, and a nut screwed to the bolt. The airbag device according to any one of claims 3 to 6, wherein 8. The air according to claim 1, wherein the locking member is formed with a fragile portion that facilitates breaking when the airbag is deployed. Bag device. 9. The airbag device according to claim 8, wherein the fragile portion is formed to be thin. 10. The fragile part is U-shaped, V-shaped, rectangular,
The airbag device according to claim 9, wherein the airbag device is formed to be thin by a groove such as an arc. 11. The airbag device according to claim 1, wherein the case is embedded in a side of a backrest of a seat on which an occupant sits. 12. The airbag device according to claim 11, wherein a skin of the seat is locked to an opening plate formed substantially parallel to an opening surface on a side peripheral portion of the opening of the case. . 13. The airbag device according to claim 1, wherein the case is fixed to a vehicle body using a mounting bolt fixed to the inflator. .