JP3722715B2 - Airbag device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In a vehicle such as a passenger car or a commercial vehicle, the present invention is directed to the front of the seat (in the case of a front seat, in the center of the steering handle, in the instrument panel, etc., in the case of a rear seat, the seat back of the front seat). , Etc.), the side of the seat (the side of the seat back, the position of the B pillar, the C pillar, the side door, etc.), the A pillar, the roof side frame, and the like.
[0002]
[Prior art]
When an airbag device is provided, a lid for deploying the airbag is covered with a cover that covers the airbag device, and a slit is disposed at a predetermined interval in a portion to be cleaved (for example, a linear thin-wall portion or a groove portion or a perforation). Etc.), and a wall portion extending perpendicularly to the back surface of the cover is integrally formed on the outer peripheral portion of the lid portion on the back surface of the cover, and provided with an airbag and an inflator There is one configured to attach the member to the wall portion on the back surface of the cover.
As a result, the airbag is inflated while being received by the wall portion and the support member on the back surface of the cover, and as the airbag expands, the planned tearing portion breaks, and the airbag expands while opening the lid portion. It becomes a state.
[0003]
[Problems to be solved by the invention]
Since the cover that covers the airbag device is generally often formed integrally with resin, as described in the prior art, a wall portion that extends perpendicular to the back surface of the cover is integrated with the cover. In the case of forming the film, a slide mold is required, and the production cost tends to be high.
In addition, when the cover and the wall are integrally formed of resin so that the wall extends perpendicularly to the back of the cover, sink marks may occur on the surface of the cover corresponding to the back wall. There is a possibility that the product value may be reduced.
An object of the present invention is to configure an airbag device such that the airbag device can be appropriately supported on the back surface of the cover while suppressing an increase in production cost and occurrence of sink marks on the cover.
[0004]
[Means for Solving the Problems]
[I]
According to the features of claim 1 , when the lid portion is integrally formed on the cover by the planned cleavage portion , the first support member is attached to the back surface of the cover, and the second support member including the airbag and the inflator is provided. It is attached to the first support member. Thus, according to the features of claim 1 while being received by the first and second supporting members airbag is inflated, cleaved scheduled portion is broken with the inflation of the airbag, the airbag opens the lid portion It is possible to obtain a state where it is unfolded.
According to the first aspect of the present invention, the first and second support members including the airbag and the inflator are configured to be directly attached to the back surface of the cover instead of the wall portion on the back surface of the cover. As described above, it is not necessary to integrally form the wall portion on the back surface of the cover.
[0005]
[II]
As described in the preceding paragraph [I], and broken cleavage scheduled portion with the inflation of the airbag, when the airbag is configured to deploy while opening the lid portion, with the inflation of the airbag lid Since it is conceivable that the portion is torn off from the cover, a scattering prevention member that prevents the lid portion from being torn off from the cover and trying to fly into the vehicle may be provided.
[0006]
When the anti-scattering member as described above is provided, according to the features of claim 1, one part of the anti-scattering member is attached to the back surface of the lid part, and the other part of the anti-scattering member is interposed via the interchangeable part. It is attached to the first support member . Thus, according to the features of claim 1, be torn off lid with the inflation of the air bag from the cover, a state in which the lid portion is to scattering in the vehicle, is prevented by scattering prevention member.
In this case, when the lid portion is opened by the air bag, while scattering prevention member mounted on the rear surface of the lid portion is drawn out to the lid portion, but it become a state as the lid portion is opened, according to claim 1 According to the above feature, pulling out of the anti-scattering member by the lid portion is allowed by the interchangeable portion, and a state in which the opening operation of the lid portion by the airbag is hindered by the anti-scattering member does not occur.
[0007]
[III]
When the anti-scattering member as described in [II] above is provided, for example, one part of the anti-scattering member is fixed to the first support member, and the other part of the anti-scattering member is attached to the back surface of the lid part. It is conceivable to configure such that it is attached via a cable.
However, with this configuration, when the first support member is attached to the back surface of the cover, the anti-scattering member is attached to the back surface of the lid portion via the interchangeable portion while the first support member is attached to the back surface of the cover relatively simply. Since it is necessary to attach, when attaching the 1st support member and the scattering prevention member to the back surface of a cover, and the back surface of a lid part, it may require a comparative effort.
[0008]
A fusion communicating portion according to the features of claim 1 is not provided between the anti-scattering member and the lid portion, is provided between the anti-scattering member and the first support member.
Accordingly, before attaching the first support member when according to the features of claim 1 on the back side of the cover, because it is possible to pre-installed via a flexible portion scattering prevention member to the first support member, the first support Both the member and the scattering prevention member can be attached relatively simply to the back surface of the cover and the back surface of the lid portion.
[0009]
[IV]
According to the first aspect of the present invention, the first support member attached to the back surface of the cover, the second support member including the airbag and the inflator is provided, and the scattering prevention member is attached to the first support member via the interchangeable portion. It is done.
Thus, according to the features of claim 1, firstly after attaching the first support member and the scattering prevention member on the back surface of the back surface and the lid portion of the cover, the first support member and the second support member having an air bag and the inflator When attaching the first support member and the scattering prevention member to the back surface of the cover and the back surface of the lid portion (especially when attaching the scattering prevention member to the back surface of the lid portion), the airbag and the inflator are obstructive. There is no such thing.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
1, 2 and 3 show the vicinity of a resin cover 1 formed on an instrument panel (not shown) located in front of a passenger seat (not shown) in a passenger car or a commercial vehicle, Three horizontal groove portions 2, 3 and two vertical groove portions 4 are formed, and the pair of lid portions 5 are arranged adjacent to each other in the vertical direction (front-rear direction) by the groove portions 2, 3, 4. The cover 1 is integrally formed.
[0011]
As shown in FIGS. 1, 2 and 3, a thin metal first support member 6 is provided. A flat-plate-shaped flange portion 8 is provided on the upper portion of the rectangular tubular main body portion 7, an opening 8 a is formed in the flange portion 8, and a flange-shaped attachment portion 7 a and a comb-like engagement are formed on the lower portion of the main body portion 7. A joint portion 7b is provided to constitute the first support member 6.
[0012]
As shown in FIGS. 1, 2, and 3, a pair of scattering prevention members 9 is constituted by a single thin metal plate. A narrow connection portion 11 extends from the upper portion of the substrate 10 while being bent, and a support plate 12 is provided in the connection portion 11, and an opening 12 a is formed in the support plate 12. A flange-like locking portion 10a is provided at the lower portion of the substrate 10, and an opening 10b is formed in the locking portion 10a.
[0013]
As shown in FIGS. 1 and 2, the second support member 13 is configured by bending a thin metal plate into a box shape. A flange-shaped attachment portion 13 a is provided on the upper portion of the second support member 13, an opening 13 b is formed in the attachment portion 13 a, and a connection portion 17 is provided on the lower portion of the second support member 13. The airbag 14 and the inflator 15 are attached to the second support member by bolts 16. The inflator 15 includes a large number of injection ports 15a on the outer periphery of the upper portion, and is filled with an igniter (not shown), an enhancer (not shown), and a gas generating agent (not shown).
[0014]
Next, attachment of the first and second support members 6 and 13 and the scattering prevention member 9 to the back surface of the cover 1 and the back surface of the lid portion 5 will be described.
As shown in FIGS. 2 and 4A, convex portions 1 a and 5 a are integrally formed on the outer peripheral portion of the lid portion 5 on the back surface of the cover 1 and on the back surface of the lid portion 5. As a result, the opening 8a of the first support member 6 (flange portion 8) is inserted into the convex portion 1a, and the convex portion 1a is caulked with heat to attach the first support member 6 to the back surface of the cover 1.
[0015]
As shown in FIGS. 2, 3, and 4 (A), the scattering prevention member 9 is inserted while the opening 10 b of the scattering prevention member 9 (substrate 10) is inserted into the engaging portion 7 b of the first support member 6 (main body portion 7). 9 (support plate 12), the opening 12a is inserted into the convex portion 5a, and the convex portion 5a is caulked with heat to attach the scattering prevention member 9 to the back surface of the lid 5. In this case, as shown in FIG. 4 (a), the portion between the engaging portions 7b in the lower portion of the first support member 6 (main body portion 7) is the upper surface of the flange portion 10a of the anti-scattering member 9 (substrate 10). It is in a state of being in close contact with.
[0016]
As shown in FIGS. 2, 3, and 4 (a), the second support member 13 is attached while the opening 13b of the second support member 13 is inserted into the engaging portion 7b of the first support member 6 (main body portion 7). The part 13a is applied to the mounting part 7a of the first support member 6 (main body part 7), and the mounting part 13a of the second support member 13 and the mounting part 7a of the first support member 6 (main body part 7) are The second support member 13 is attached to the first support member 6 by connecting with each other. A horizontal frame 19 connected across right and left A pillars (not shown) is disposed inside the instrument panel, and the connecting portion 17 of the second support member 13 is connected to the horizontal frame 19 by a bolt 20. connect.
[0017]
With the above structure, when a collision sensor (not shown) provided in the vehicle body detects a collision, the enhancer is ignited by the igniter in the inflator 15, and the gas generating agent is combusted by the combustion of the enhancer and is generated from the gas generating agent. The discharged gas is ejected radially from the ejection port 15a in the outer circumferential direction. Gas flows from the periphery of the airbag 14 toward the center of the airbag 14, and the airbag 14 is inflated while being received by the first support member 6 (main body portion 7) and the second support member 13. The bag 14 presses the lid portion 5 and the support plate 12 (scattering prevention member 9). As a result, as shown in FIG. 4 (b), the groove portions 2, 3, and 4 are broken, and the lid portion 5 is opened while the connection portion 11 (scattering prevention member 9) is bent with the groove portion 3 as a hinge portion. The peripheral part of 14 is developed first, and the central part of the airbag 14 is deployed with a delay.
[0018]
As shown in FIG. 4A, since the engaging portion 7b of the first support member 6 (main body portion 7) is inserted into the opening 10b of the scattering prevention member 9 (substrate 10), the lid portion as described above. When the anti-scattering member 9 (substrate 10) is pulled up as the opening 5 is opened, the locking portion 10a of the anti-scattering member 9 (substrate 10) is moved to the first position as shown in FIG. 2 The opening 10b of the anti-scattering member 9 (substrate 10) moves relative to the engaging portion 7b of the first supporting member 6 (main body portion 7) while bending along the attachment portion 13a of the supporting member 13, and the The prevention member 9 (substrate 10) moves upward without hindrance. Thereby, the state in which the lid part 5 is opened is not disturbed by the scattering prevention member 9.
[0019]
Since the cover 1 and the lid portion 5 are made of resin, the groove portion 3 may be completely broken by the inflation of the airbag 14, and the lid portion 5 may be torn off from the cover 1. In this case, the anti-scattering member 9 is made of metal, and the upward movement of the anti-scattering member 9 (substrate 10) is stopped by the engaging portion 7b of the first support member 6 (main body portion 7), whereby the lid The part 5 is not scattered in the vehicle.
[0020]
[Another Embodiment of the Invention]
In Embodiment of the Invention] described above, abolished the lateral groove 2 (see FIGS. 1 and 3), three grooves portrait 4, the groove 4 of the upper and lower ends of the lateral two grooves 3 is formed on the back surface of the cover 1, and two lid portions (not shown) are formed integrally with the cover 1 so as to be lined up on the left and right sides by the groove portions 3, 4. You may comprise so that it may open to right and left. If comprised in this way, the scattering prevention member 9 attached to the back surface of a lid part will also be in the state located in a line with right and left.
[0021]
In the above-mentioned [Embodiment of the invention] and [Another embodiment of the invention], the right lid portion (not shown) that opens to the right is adjacent to the right side of the lid portion 5 shown in FIGS. A left lid portion (not shown) that opens to the left side may be formed integrally with the cover 1. In this case, the scattering prevention member 9 may be attached to the back surfaces of the right and left lid portions.
[0022]
In the above-mentioned [Embodiment of the invention] and [Another embodiment of the invention], the instrument panel and the cover 1 are not configured separately, but the cover 1 and the lid portion 5 are integrated with the instrument panel. You may form in. Instead of the grooves 2, 3, and 4, the lid portion 5 (the right and left lid portions) may be integrally formed with the cover 1 by slits or the like arranged at a predetermined interval in a perforated shape.
[0023]
【The invention's effect】
According to the first aspect of the present invention, the first and second support members including the airbag and the inflator are configured to be directly attached to the back surface of the cover instead of the wall portion on the back surface of the cover. It is no longer necessary to form the wall in one piece. As a result, since the cover has a relatively simple shape, the cover can be formed without using a slide mold, and the production cost can be reduced. The cause (the part of the surface corresponding to the wall on the back side of the cover) could be reduced, and the decline in the commercial value could be suppressed.
[0024]
According to the feature of the first aspect, when the anti-scattering member for preventing the lid portion from being torn off from the cover and trying to be scattered in the vehicle is provided, the other portion of the anti-scattering member is connected to the first via the interchangeable portion . By attaching to the support member , the opening operation of the lid portion by the airbag, the inflation and deployment of the airbag can be performed without any trouble, and the performance of the airbag device can be fully exhibited.
[0025]
According to the first aspect of the present invention, by providing the accommodation portion between the first support member and the scattering prevention member, the scattering prevention member can be accommodated in the first support member before the first support member is attached to the back surface of the cover. It is possible to attach the first support member and the anti-scattering member to the back surface of the cover and the back surface of the lid portion relatively simply by using the air bag. This is advantageous in terms of easy attachment to the back of the device cover.
[0026]
According to the features of claim 1, after attaching the first support member and the scattering prevention member on the back surface of the back surface and the lid portion of the cover, it is possible to attach the second support member having an air bag and the inflator to the first support member By configuring so that the first support member and the anti-scattering member are attached to the back surface of the cover and the back surface of the lid portion (particularly when attaching the anti-scattering member to the back surface of the lid portion), the air bag and the inflator are in the way. This has become more advantageous in terms of ease of attachment to the back surface of the cover of the airbag device.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a lid portion, first and second support members, and a scattering prevention member. FIG. 2 is a longitudinal side view of the vicinity of a cover and lid portion, first and second support members, and a scattering prevention member. 3] Plan view of the first support member and the scattering prevention member. FIG. 4 is a longitudinal side view of the cover and the lid, the first and second support members, the vicinity of the scattering prevention member, and the airbag in a deployed state. Side view [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cover 2, 3, 4 Planned cleavage part 5 Lid part 6 1st support member 7b, 10b interchangeable part 9 Scatter prevention member 13 2nd support member 14 Airbag 15 Inflator

Claims (1)

The lid part is integrally formed on the cover by the planned cleavage part, the first support member is attached to the back surface of the cover, the second support member including the airbag and the inflator is attached to the first support member,
As the airbag is inflated, the planned opening portion is broken, the lid portion is opened with a predetermined portion of the lid portion as a hinge portion, and the airbag is deployed.
Attach one part of the anti-scattering member to the back of the lid part,
The other part of the anti-scattering member is connected to the first part through a flexible part that allows the anti-scattering member to be pulled out by a predetermined amount by opening the lid portion and prevents the anti-scattering member from being pulled out by a predetermined amount or more . An airbag device attached to the support member .

Images