JP3353646B2 - Mounting structure of airbag device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of an airbag device, and more particularly to a mounting structure of a passenger airbag device.

[0002]

2. Description of the Related Art An airbag device for a passenger seat is mounted in an opening formed in an instrument panel in front of a passenger seat (as a similar technique, Japanese Utility Model Laid-Open No. 6-25056).
Reference). The airbag device is composed of a case accommodating an inflator and an airbag therein, and a lid closing an upper opening of the case, and both are firmly fixed in advance by a plurality of screw means or the like so as to prevent rattling. ing.

[0003] In the airbag device inserted into the opening of the instrument panel, the lid is attached to the opening of the instrument panel, and the base provided in the case serves as a vehicle body fixing member in the instrument panel. Screwed to the steering member.

Since the lid and the case are firmly integrated in advance, the lid is attached to the opening of the instrument panel so that the screw holes of the base of the case and the steering member are aligned with each other. Stopping work can be performed easily.

[0005]

However, in such a conventional technique, since the lid and the case are firmly integrated, the operation of manufacturing the airbag device is troublesome.

Therefore, recently, in order to simplify the manufacturing operation of the airbag device, a structure has been adopted in which the lid and the case are integrated by a simple mounting method with play.

[0007] Therefore, although the manufacturing workability of the airbag device itself is improved, the lid and the case move relatively, and when the lid is mounted on the instrument panel, the screw hole between the base of the case and the steering member is formed. Positionability is impaired, and workability in mounting the airbag device is reduced.

The present invention has been made by paying attention to such a conventional technique, and provides an airbag device mounting structure capable of improving both the manufacturing workability and the mounting workability of the airbag device. Things.

[0009]

According to the first aspect of the present invention,
A case containing an inflator and an airbag therein, and a lid for closing an upper opening of the case,
An airbag device having a structure in which engagement holes are provided in a pair of front and rear attachment pieces formed on the back surface of the lid, and hooks attached to the engagement holes on the front and rear surfaces of the case are provided with predetermined play and engaged.
An installation structure of an airbag device provided in an opening formed in a front surface portion of an instrument panel and screwing a base portion provided in a case to a vehicle body fixing member, wherein an opening of the instrument panel is provided on a back surface of the lid. A pair of right and left reinforces, each of which has an engaging claw that engages with a peripheral edge of the portion, and a left and right edge of an opening formed in the instrument panel that projects into the opening and has a slit formed therein. Provided on the left and right sides of the case,
A bracket that contacts the upper surface of the reinforcement to position the case in the vertical direction, a downward projection that is inserted into the slit of the reinforcement to position the case in the front-rear direction, and engages with the inner end of the reinforcement. And a clip for positioning the case in the left-right direction.

According to the first aspect of the present invention, in order to improve the operability of the manufacturing of the airbag device, the lid and the case are integrated with play while being integrated.
The lid is accurately positioned with respect to the opening of the instrument panel by the engaging claw, and the case is accurately positioned by the bracket (vertical direction), downward projection (front and rear direction), and clip (left and right direction). The screw holes of the base portion and the vehicle body fixing member match exactly, and the workability of mounting the airbag device is improved.

According to the second aspect of the present invention, the downward projection is formed integrally with the bracket.

According to the second aspect of the present invention, since the downward projection is formed on the bracket, a dedicated component for forming the downward projection is not required, and the number of components can be reduced.

According to a third aspect of the present invention, each of the brackets is provided with a welding nut which is screwed to a mounting hole of the reinforcement.

According to the third aspect of the present invention, since the welding nuts provided on the brackets are screwed into the respective mounting holes of the reinforcement, the mounting strength of the case is further increased.

According to a fourth aspect of the present invention, the contact surface of the bracket with the reinforcement is formed on the front end surface and the rear end surface which are separated from each other in the front and rear directions, while the front surface or the rear end surface of the bracket abuts on the reinforcement. A slope portion is formed in the front-rear direction.

According to the fourth aspect of the present invention, the slope is formed in the reinforcement in contact with the front end face or the rear end face of the bracket. The displacement in the direction is prevented.

According to a fifth aspect of the present invention, the clip is attached to the bracket.

According to the fifth aspect of the present invention, since the clip is attached to the bracket, the clip can be attached at the same time by attaching the bracket to the case.

According to a sixth aspect of the present invention, a downward rib is formed on the outer peripheral edge of the lid, and the lower end of the rib is brought into contact with the peripheral edge of the opening of the instrument panel.

According to the sixth aspect of the present invention, since the downward rib formed on the peripheral edge of the lid is in contact with the peripheral edge of the opening of the instrument panel, the mounting state of the lid is stabilized.

According to a seventh aspect of the present invention, the vicinity of the front and rear ends of the left and right reinforcements is connected to each other by a bridging member extending along the left and right direction.

According to the seventh aspect of the invention, the vicinity of the front and rear ends of the reinforce is connected to each other by the bridging members extending in the left-right direction, so that the rigidity of the reinforce is increased and the mounting strength of the case is improved.

[0023]

According to the first aspect of the present invention, in order to improve the workability of manufacturing the airbag device, the lid and the case are integrated with play while the lid is engaged. The dovetail accurately positions the instrument panel opening, and the case is accurately positioned by the bracket (vertical direction), downward projection (front and rear direction), and clip (left and right direction). The screw holes of the vehicle body fixing member match exactly, and the workability of mounting the airbag device is improved.

According to the second aspect of the present invention, since the downward projection is formed on the bracket, a dedicated component for forming the downward projection is not required, and the number of components can be reduced.

According to the third aspect of the present invention, since the welding nuts provided on the bracket are screwed to the respective mounting holes of the reinforcement, the mounting strength of the case is further increased.

According to the fourth aspect of the present invention, the slope is formed in the reinforcement in contact with the front end face or the rear end face of the bracket. The displacement in the direction is prevented.

According to the fifth aspect of the present invention, since the clip is attached to the bracket, the clip can be attached at the same time by attaching the bracket to the case.

According to the sixth aspect of the present invention, since the downward rib formed on the peripheral edge of the lid is in contact with the peripheral edge of the opening of the instrument panel, the mounting state of the lid is stabilized.

According to the seventh aspect of the present invention, the vicinity of the front and rear ends of the reinforce is connected to each other by the bridging members extending in the left-right direction, so that the rigidity of the reinforce is increased and the mounting strength of the case is improved.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, A indicates the front side, B indicates the rear side, C indicates the right side, and D indicates the left side.

An opening 2 is formed in an upper surface of the instrument panel 1 disposed in front of the passenger seat, and a peripheral portion 2a including four front, rear, left and right sides thereof is one step lower than the general surface. Is formed.

A pair of left and right metal plate-shaped reinforces 3 projecting into the opening 2 are provided at both edges of the opening 2 opposed to each other in the left-right direction. The front and rear ends of the reinforcement 3 are screwed to bosses 4 formed on the back surface of the instrument panel 1.

The reinforce 3 has two mounting holes 5 and 6 at the front and rear, and a portion where the rear mounting hole 6 is formed is a slope 7 and a front mounting hole. A slit 8 in the front-rear direction is formed at a position adjacent to the outside of 5.

Another slope 9 is formed on the front side of the slope 7, and both have a mountain-shaped bent shape.

Further, since the vicinity of the front and rear ends of the reinforcement 3 is connected to each other by the erection members 10 and 11 extending in the left-right direction, the overall rigidity of the reinforcement 3 is improved.

Inside the instrument panel 1, there is disposed a steering member 12 as a vehicle body fixing member extending in the left-right direction. The steering member 12 is provided with a pair of left and right fixing brackets 13, and each of the fixing brackets 13 has a screw hole 14.

Reference numeral 15 denotes an airbag device, which has a cross section U in which an inflator 16 and an airbag 17 are housed.
It comprises a metal case 18 in the shape of a letter and a lid 19 made of synthetic resin for closing the upper opening of the case 18.

On the rear surface of the lid 19, a pair of front and rear mounting pieces 20 and a pair of left and right side portions 21 are integrally formed. Each of the side surfaces 21 has a lower central portion cut out.
A thin H-shaped cleavage portion 22 is provided in a portion of the lid 19 surrounded by the mounting piece 20 and the side surface portion 21. In addition, three engagement holes 23 are formed in the mounting piece 20 in a line in the left-right direction. The upper portion of the engagement hole 23 is formed by a thin portion 23a that is easily deformed.

Downward ribs 24 are formed all around the periphery of the lid 19. On the rear surface of the lid 19, one engaging claw 25 having the same shape is formed on each of the left and right ends, and three engaging claws 26 having the same shape as the engaging claw 25 are formed on the rear side. On the front side, three engaging claws 27 having different shapes are formed.

The front engaging claw 27 is provided on the periphery 2 of the opening 2.
The engaging claws 25, 26 on the left and right sides and the rear side are pushed in from above and engaged with the terminal of the peripheral portion 2a.

The front and rear surfaces of the case 18 are approximately C
A hook 28 having a shape is provided, and the hook 28 is engaged with an engagement hole 23 formed in the mounting piece 20 of the lid 19 with play provided. Hook 28
Is engaged with the engagement hole 23 by deforming the thin portion 23a located above the engagement hole 23, so that the engagement operation is easy.

After the engagement, the thin portion 23a
Prevents the detachment of the hook 28, so that the structure is simpler and the mounting operation is easier than in the case where both the lid 19 and the case 18 are firmly mounted by a plurality of screw means as in the related art.

Further, the left and right sides of the case 18
A shaped bracket 29 is welded. In this bracket 29, a horizontal front end surface 30 corresponding to the front mounting hole 5 of the reinforce 3 and a rear end surface 31 having the same angle as the slope portion 7 corresponding to the rear mounting hole 6 are separated from each other back and forth. It is formed.

A welding nut N is provided on each of the front end face 30 and the rear end face 31.

From the outer end of the front end face 30, the downward projection 3
2 are integrally bent. This downward projection 32
Is equal to the front and rear size Y2 of the slit 8 (Y1 = Y2), and its thickness X1 is the width X2 of the slit 8.
(X1 <X2).

The downward projection 32 is provided on the bracket 2.
9, the dedicated parts are unnecessary, and the number of parts can be reduced.

At substantially the center of the bracket 29, a clip 33 having an angle perpendicular to another slope 9 is attached.
The free end engages with the inner end of the inclined portion 9.

Since the clip 33 is attached to the bracket 29, the clip 33 can be attached at the same time by attaching the bracket 29 to the side surface of the case 18.

A pair of left and right base portions 34 is attached to the front side surface of the case 18.
A screw hole 35 corresponding to the screw hole 14 is formed.
On the back side of the screw hole 35, a welding nut N is provided.

Next, how to attach the airbag device 15 will be described.

First, the airbag device 15 is inserted into the opening 2 of the instrument panel 1 from the upper side, and is slightly turned toward the front.
Into the peripheral portion 2 a on the front side of the opening 2.

Next, the rear side of the lid 19 is pushed in, and the rear engagement claws 26 and the left and right engagement claws 25 are engaged with the ends of the opening 2. Each engaging claw 25, 26, 2 of the lid 19
7 engages with the peripheral edge 2a of the opening 2, so that the position of the lid 19 in the front-rear, left-right and up-down directions is determined. With the lid 19 attached to the opening 2, the lower end of the rib 24 formed on the peripheral edge of the lid 19 abuts on the peripheral edge 2 a of the opening 2, so that the mounting state of the lid 19 is stable.

When attaching the lid 19 to the instrument panel 1, the case 18 is attached to the reinforcement 3.

That is, the front end face 30 and the rear end face 31 of the bracket 29 are brought into contact with the reinforce 3 and the downward projection 32 formed on the front end face 30 is formed by the slit 8.
And the clip 33 is engaged with the slope 9.

By bringing the front end face 30 and the rear end face 31 into contact with the reinforce 3, the vertical position of the case 18 is determined.

Since the front-rear size Y1 and Y2 of the downward projection 32 and the slit 8 are equal, the downward projection 32 is
The position of the case 18 in the front-back direction is determined by inserting it into the inside.

The position in the left-right direction is determined by engaging the clip 33 with the slope 9.

The case 18 in which the vertical, front, rear, left and right positions are determined as described above is attached to the mounting holes 5 and 6 of the reinforcement 3.
The bolt T inserted from above is fastened to each welding nut N of the bracket 29. Thereby, the displacement of the case 18 is prevented. The fact that the rear end face 31 is in contact with the slope 7 at the same angle also helps to prevent the case 18 from being displaced to the front.

As described above, since the vertical and horizontal positions of the case 18 are accurately determined, the screw hole 35 of the base 34 of the case 18 and the steering The screw hole 14 of the fixing bracket 13 of the member 12 will exactly match.

Accordingly, if the bolts T are inserted into the mounting holes 14 and 35 and screwed into the welding nut N, the mounting of the airbag device 15 is completed. Lid 19 and case 1
Although the airbag device 8 is mounted with play, the airbag device 15 can be easily mounted.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a mounting structure of an airbag device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line SA-SA shown in FIG.

FIG. 3 is a perspective view showing a downward projection and a slit.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 instrument panel 2 opening 3 reinforcement 7 slope 8 slit 10, 11 erection material 12 steering member (vehicle fixing member) 14, 35 screw hole 15 airbag device 16 inflator 17 airbag 18 case 19 lid 20 mounting piece 23 Engagement hole 24 Rib 25, 26, 27 Engagement claw 28 Hook 29 Bracket 30 Front end surface 31 Rear end surface 32 Downward projection 33 Clip 34 Base part A Front side B Rear side C Right side D Left side N Weld nut T Bolt

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Yuji Sasaki 2 Nissan Motor Co., Ltd. 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture (56) References JP-A-10-230810 (JP, A) JP-A-9- 24790 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B60R 21/16-21/32

Claims (7)

(57) [Claims] A first case that houses an inflator and an airbag therein; and a lid that closes an upper opening of the case. A pair of front and rear mounting pieces formed on a back surface of the lid are provided with engagement holes. An airbag device having a structure in which hooks attached to front and rear surfaces of a case are provided with predetermined play in engagement holes and are engaged in an opening formed in a surface portion of an instrument panel, and a base portion provided in the case. A mounting structure of an airbag device for screwing the instrument to a vehicle body fixing member, wherein an engagement claw that engages with a peripheral portion of an opening of an instrument panel is formed on a back surface of the lid, and the instrument comprises: A pair of left and right reinforces are provided at both left and right edges of the opening formed in the panel, each of which protrudes into the opening and is provided with a slit. A bracket that contacts the upper surface of the force to position the case in the vertical direction, a downward projection that is inserted into the slit of the rain force to position the case in the front-rear direction, and engages with the inner end of the rain force A mounting structure for an airbag device, comprising: a clip for positioning the case in the left-right direction. 2. The mounting structure for an airbag device according to claim 1, wherein the downward projection is formed integrally with the bracket. 3. The mounting structure for an airbag device according to claim 1, wherein the bracket is provided with a welding nut screwed into a mounting hole of the reinforcement. Airbag device mounting structure. 4. The mounting structure for an airbag device according to claim 1, wherein a contact surface of the bracket with the reinforce is formed between a front end surface and a rear end surface separated from each other. A mounting structure for an airbag device, wherein a front surface or a rear surface of the bracket is formed with a slope in the front-rear direction on the reinforcement while being formed. 5. The mounting structure for an airbag device according to claim 1, wherein the clip is mounted on a bracket. 6. The mounting structure for an airbag device according to claim 1, wherein a downward rib is formed on an outer peripheral edge of the lid, and a lower end of the rib is formed in an opening of an instrument panel. A mounting structure for an airbag device, wherein the airbag device is abutted on a peripheral portion of the portion. 7. The mounting structure for an airbag device according to claim 1, wherein the left and right reinforcements are connected to each other near the front and rear ends thereof by a bridging member extending in the left-right direction. Characteristic airbag device mounting structure.