JP2526487Y2 - Cover structure of occupant protection device - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] <Industrial application field> The present invention relates to a cover structure of an occupant protection device, particularly for covering an airbag device housed inside an instrument panel or the like. Regarding the structure of the cover.

<Conventional technology> An airbag device provided on a passenger seat side is provided in a space inside an instrument panel, for example, as disclosed in JP-A-62-198547. It is general that an airbag is configured to inflate into a vehicle cabin through an opening formed in an appropriate place. The opening is usually closed with a lid which is formed so as to be continuous with the instrument panel so that the area around the instrument panel is not unsightly.

Now, it is necessary that the lid does not hinder the rapid inflation of the airbag and that it can withstand a slight external impact. As a lid structure to satisfy such demands, a core material made of aluminum material is insert-molded with a skin material made of urethane resin,
And, in order to be easily bent and open the opening by the inflation pressure of the airbag, a hinge portion having low rigidity is provided at a position adjacent to one fixing portion, and at a position adjacent to the other fixing portion. 2. Description of the Related Art There is known a structure in which a continuous thin portion is formed so as to be easily breakable along a predetermined line.

<Problem to be solved by the invention> However, if the other fixing part is formed of urethane resin and the same part is tightened with a plurality of bolts and nuts scattered in the longitudinal direction, when the airbag is inflated, The stress acting on the thin portion tends to be uneven, and the break line tends to be relatively uncertain. In some cases, there is a risk that some of the fragments of the thin portion may be scattered.

The present invention has been devised in order to improve such inconvenience, and a main object of the present invention is to improve a thin-walled break portion so that the break portion is stably broken by the inflation pressure of the airbag. An object of the present invention is to provide a cover structure for an occupant protection device.

[Configuration of the Invention] <Means for Solving the Problems> According to the present invention, the purpose of the present invention is to provide a vehicle in which a deceleration exceeding a predetermined value is accommodated in an accommodation section formed at a specific position of the vehicle. The airbag that pushes open the lid that covers the opening from the opening of the storage portion when it acts on the
A cover structure of an occupant protection device housed in a housing fixed to a vehicle body, wherein the lid has a hinge function at a mounting portion on one edge side, and is provided between a lid and a mounting portion on the other side. Has a thin portion that can be broken by the inflation force of the airbag, and the mounting portion on the other edge side,
By providing a cover structure of the occupant protection device, the cover structure is fixed to the housing via a strength member extending along the thin portion while being superposed on the outer surface of the attachment portion on the other edge side. Achieved.

<Operation> According to such a configuration, when the mounting portion is tightened with a plurality of bolts, the tightening force is equalized over the entire length of the mounting portion adjacent to the thin portion to be broken. Therefore, the tensile stress acting on the thin portion by the inflation force of the airbag is:
It becomes uniform over the entire length of the set break line, and the mode of breakage of the thin portion becomes uniform.

<Embodiment> The configuration of the present invention will be described in detail below with reference to specific embodiments shown in the accompanying drawings.

FIG. 1 is a cross-sectional view of an instrument panel of a vehicle to which the present invention is applied, on a passenger seat side. The upper surface of the instrument panel 2 facing the inner surface of the front windshield 1 of this vehicle is relatively flat,
An airbag device 3 for protecting an occupant from an impact at the time of a vehicle collision is incorporated in an internal space corresponding to a passenger seat.

The airbag device 3 ignites a gas generating agent such as sodium nitride by a signal based on a sudden deceleration generated at the time of a vehicle collision, and instantaneously activates a nylon bag-shaped airbag 4 by the gas pressure generated at that time. The inflated airbag 4 is intended to receive an occupant who is going to move forward at the time of a vehicle collision, and there is basically no difference from a similar device known in the art. Description is omitted.

An airbag 4 is provided on the upper surface of the instrument panel 2.
An opening 5 is provided for allowing the airbag to swell into the vehicle interior. The opening 5 is normally closed by a lid 6 so as to be continuous with the upper surface of the instrument panel 2. The lid 6 has appropriate rigidity so as to prevent the instrument panel from becoming unsightly around the normal state, and at the same time, when the airbag 4 is inflated, quickly inflates the airbag 4 into the vehicle interior. In order not to obstruct it, it can be easily opened in response to pressure from inside.

The lid 6 has a core 7 made of aluminum or the like.
The mounting portion 9 is formed by insert molding with a skin material 8 such as a urethane resin material and provided along both ends in the front-rear direction.
With 10, it is fixed to the housing 11 of the airbag device 3.

A mounting portion 9 on the front side of the vehicle body of the lid 6 is formed directly on the core member 7. As shown in FIG. 2, the front mounting portion 9 is formed at a portion where the core material 7 is partially exposed from the lower surface of the skin material 8, and is mounted at an angle that can be joined to the mounting bracket 12 on the housing side. A surface 13 is formed, bent upward at a substantially right angle from the mounting surface 13 and then horizontally bent rearward to form a hinge portion 14, and the rear portion 15 thereof is formed in the thickness direction of the skin material 8. In order to be positioned at the intermediate portion, the hinge portion 14 is bent upward again from behind the hinge portion 14 and then bent backward. The hinge portion 14 is provided with a plurality of substantially triangular small holes 16 along a broken line (third hole).
(Fig.), The rigidity of this part is made extremely lower than that of the other parts. This ensures that the lid 6 is bent from the same portion.

The periphery of the hinge portion 14 is not completely filled with urethane resin, and a void 17 is formed. In the space 17, a portion from the mounting surface 13 of the core member 7 to the hinge portion 14 facing the skin material 8 is made of a steel plate, and a nut 18 is fixed to a key point. The reinforcing plate 19 is overlapped, and a plurality of locations of the mounting surface 13 are fastened together with the reinforcing plate 19 to the bracket 12 on the housing 11 side of the airbag device 3 so that the lid 11 is attached to the housing 11 of the airbag device 3. The front mounting portion 9 of the fixing device 6 is fixed.

As shown in FIG. 5, the rear mounting portion 10 of the lid 6
A hanging piece 20 is formed integrally with the skin material 8. Then, the hanging piece 20 is brought into contact with the surface of the housing 11 of the airbag device 3 on the vehicle interior side, and a plurality of bolts 21 erected on the housing 11 via a pressing plate 22 having a function of a strength member. By tightening the nut 23, the rear mounting portion of the lid 6
10 is fixed to the housing 11.

The holding plate 22 is provided at its upper edge with a hook 24 that cuts into the base of the hanging piece 20. A protruding ridge 25 that engages with the lower edge of the holding plate 22 is formed on the lower edge of the hanging piece 20. The holding plate 22 disperses the tightening force of the nut 23 and acts on the hanging piece 20, so that the holding and fixing force over the entire length of the hanging piece 20 is made uniform. A groove 26 is formed in the portion adjacent to the base of the hanging piece 20 over the entire length of the hanging piece 20 in the left-right direction. With this groove 26, the part actually fixed to the housing 11 and the lid A clear thin portion is formed between the main body 6 and the main body 6.

When the collision impact of the vehicle is detected and the airbag 4 is inflated, the inflation pressure causes the hanging piece 20 of the rear mounting portion 10 to be inflated.
The rear mounting portion side of the lid 6 is cut along the groove 26 formed in the groove 6. At the same time, the hinge portion 14 on the front mounting portion side is bent to open the lid 6, and the airbag 4 inflates into the vehicle compartment so as to close the gap between the occupant and the front windshield 1. At this time, the reinforcing plate 19 provided on the front mounting portion 9 has high rigidity and is difficult to be deformed, so the edge of the reinforcing plate 19 becomes a fulcrum,
The hinge part 14 is surely bent. Further, when the hinge portion 14 is bent, the skin material layer above the hinge portion 14 is also bent to be partially compressed and partially wrinkled, but a gap 17 is formed between the hinge portion 14 and the skin material layer 8. Is provided, so this gap
At 17, the deformation of the skin material 8 is absorbed, and there is no resistance to the flip-up of the lid 6 (FIG. 4).

Further, the hanging piece 20 on the rear mounting portion side is torn apart by the inflation pressure of the airbag 4 along the thin-walled groove 26. In the above-described configuration, the hook portion 24 of the holding plate 22 is
Since it digs in just below 26, the tensile stress when the airbag is inflated concentrates on the groove 26. Moreover, the ridge 25 is a holding plate
Since the airbag is engaged with the airbag 22, the tensile stress when the airbag is inflated acts uniformly over the entire length of the hanging piece 20. Therefore, the breaking line of the lid 6 is stabilized, and fragments and the like do not scatter.

[Effects of the Invention] As described above, according to the present invention, the strength member is extended along the line to be broken at the fixed portion on the side where the break portion is provided. It will break. Therefore, the deployment performance of the lid is enhanced, and there is a great effect in improving the operation stability of the occupant protection device.

[Brief description of the drawings]

1 is a schematic overall configuration diagram of the device of the present invention, FIG. 2 is a partially enlarged view of a front mounting portion of a lid showing a normal state, and FIG. 3 is a plan view of a core material. Yes, Figure 4 shows
FIG. 5 is a partially enlarged view of a front mounting portion of the lid showing a state at the time of development, and FIG. 5 is a partial perspective view of a rear mounting portion. DESCRIPTION OF SYMBOLS 1 ... Front windshield 2 ... Instrument panel 3 ... Airbag device 4, ... Airbag 5 ... Opening, 6 ... Lid 7 ... Core material, 8 ... Skin material 9.10 ... Mounting , 11… Housing 12… Mounting bracket, 13… Mounting surface 14… Hinge, 15… Rear part 16… Small hole, 17… Void 18… Nut, 19… Reinforcement plate 20… ... hanging pieces, 21 ... bolts 22 ... holding plate, 23 ... nuts 24 ... hooks, 25 ... ridges 26 ... grooves

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masanori Takakawa 1-4-1 Chuo, Wako-shi, Saitama Inside of Honda R & D Co., Ltd. (56) References JP-A-58-110338 (JP, A) JP-A Sho 64-90843 (JP, A)

Claims (1)

(57) [Scope of request for utility model registration] When a deceleration exceeding a predetermined value is applied to a vehicle and is accommodated in an accommodation portion formed at a specific position of a vehicle, a lid that covers the opening is pushed out from an opening of the accommodation portion to open the vehicle interior. A cover structure of an occupant protection device in which an airbag that protrudes into a housing fixed to a vehicle body, wherein the lid has a hinge function at a mounting portion on one edge side, and has a lid on the other side. A thin portion that can be broken by the inflation force of the airbag between the mounting portion and the lid, wherein the mounting portion on the other edge side is a thin portion in a state of being superimposed on an outer surface of the mounting portion on the other edge side; A cover structure for an occupant protection device, wherein the cover structure is fixed to the housing via a strength member extending along the direction of the occupant protection device.