JP2001151063A - Ornament for air bag cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ornament for an air bag cover lightened without reducing decorativeness, capable of providing favorable mounting workability of a mounting leg part, and preventing an uncomfortable feeling even when an occupant interferes with an end face or the like of a decorative part during opening of an air bag cover door part. SOLUTION: This ornament 21 is provided with the decorative part 22 arranged on a surface side of the door part 14 of the air bag cover 10, and the mounting leg part 28 extending downward from the decorative part, penetrating a mounting hole 18 of the door part, and bent on a back face side of the door part for mounting the decorative part on the door part. The decorative part and the mounting leg part are formed by pressing one raw sheet metal material so that a space part 26 penetrating from the front to the back is provided inside an arrangement area of the decorative part and a cross section of the decorative part is a reversed U-shape. A sharp edge portion after the pressing is removed by a surface treatment for decorating the decorative part after the pressing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ornament which is attached to an airbag cover which covers an airbag folded and stored. An airbag device provided with an airbag cover is mounted on a steering wheel, a front part of a passenger seat, a door, a seat, and the like of an automobile.

[0002]

2. Description of the Related Art Conventionally, as an ornament attached to a door portion of an airbag cover which is opened when an airbag is inflated, the one described in Japanese Patent Application Laid-Open No. H11-20591 has been known. In the ornament of the above publication, the decorative portion arranged on the door portion of the airbag cover is configured such that a potting layer is provided on the surface side of the base made of a metal plate. And the ornament was attached to the door part of the airbag cover by using the attachment legs extending from both sides of the base of the decorative part.

However, in the conventional ornament, the decorative portion is formed by providing a thick potting layer on a base made of a metal plate, and since it is heavy, it is attached to the mounting leg portion so that it can be firmly attached to the opening door. The ornaments were attached to the door by connecting each other with rivets.

[0004] For this reason, in a conventional ornament, the work of attaching the door to the door portion of the airbag cover is troublesome.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and achieves weight reduction without deteriorating decorativeness, improves the mounting workability of mounting legs, and improves the workability of the door of the airbag cover. It is an object of the present invention to provide an ornament for an airbag cover which does not give an unpleasant feeling even when an occupant interferes with a decorative portion or an end face of a mounting leg portion when opening.

[0006]

An ornament according to the present invention is attached to a door portion of an airbag cover having a door portion which covers the folded airbag and opens when the airbag is inflated, A decorative portion arranged on the front side of the door portion, and extending downward from the decorative portion, penetrating through a mounting hole of the door portion, and being bent on the back side of the door portion, so that the decorative portion is A plurality of mounting legs attached to the part, and an ornament for an airbag cover comprising: a decorative part, wherein the decorative part is provided with a space that penetrates the front and back in an arrangement area of the decorative part, and The decorative portion and the mounting leg portion are formed by pressing one sheet metal material so that the cross section of the decorative portion has an inverted U-shape, and the decorative portion after the press working is decorated. After press working by surface treatment Sharp edges, characterized in that it is removed.

[0007]

According to the ornament according to the present invention, since one sheet metal material is formed by press working and a space portion penetrating the front and back is formed in the arrangement area of the decorative portion, it is extremely high. The weight can be reduced. As a result, multiple mounting legs can be inserted through the mounting holes in the airbag cover door, and simply bent at the back side of the door to secure the mounting strength according to the weight and to easily attach the ornament to the door. Can be attached to

Further, since the decorative portion is formed in an inverted U-shape in cross section, it looks like a three-dimensional thickness when viewed from the surface side of the airbag cover. In addition, since the surface treatment for decoration is performed, the decorativeness is not reduced.

In addition, since the sharp edge portion after the press working is removed during the surface treatment, the door to which the ornament is attached is opened, and the occupant can use the ornamental portion of the ornament, the end face of the mounting leg, or the like. , The touch does not touch the sharp edge portion, thereby preventing the occupant from feeling unpleasant. Of course, the removal of the sharp edge portion can be performed by the surface treatment itself for decorating the decorative portion without separately performing polishing or the like, so that the ornament can be easily manufactured.

Therefore, in the ornament for an airbag cover according to the present invention, the decorativeness is not reduced.
The weight can be reduced, and as a result, the mounting workability of the mounting legs can be improved in a state where the mounting strength according to the weight is secured, and the door of the airbag cover can be further improved without increasing the manufacturing process. Even when the occupant interferes with the decorative portion or the end surface of the mounting leg portion when opening the portion, the passenger does not feel uncomfortable.

[0011]

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

The airbag cover 10 to which the ornament 21 of the embodiment is attached is used for the airbag device 1 disposed above the boss B at the center of the steering wheel W as shown in FIG. The bag device 1 includes an airbag 2 that is folded and stored, an inflator 4 that supplies gas for inflation to the airbag 2,
And a bag holder 5 for holding the airbag 2, the inflator 4, and the cover 10.

The airbag 2 has a bag shape provided with an opening 2a at the bottom. The inflator 4 includes a cylindrical main body 4a having a gas discharge port 4b at an upper portion, and a flange 4c protruding from the outer peripheral surface of the main body 4a. The bag holder 5 has the inflator body 4 in the center.
bottom wall 6 in which an insertion hole 6a for inserting a from below is disposed.
And a side wall 7 extending downward from the peripheral edge of the bottom wall 6.

The attachment of the airbag 2 and the inflator 4 to the bag holder 5 is performed by opening the airbag 2 through the opening 2.
An annular retainer 3 disposed on the peripheral edge of the air bag 2 includes bolts (not shown) projecting downward. These bolts are connected to the peripheral edge of the airbag opening 2a, the peripheral edge of the insertion hole 6a of the bag holder bottom wall 6, and the inflator 2. This is done by penetrating through the flange portion 4c and fixing with a nut.

The air bag cover 10 is attached to the bag holder 5 by a side wall 20 extending below the cover 10.
However, the rivet 9 is fixed to the side wall 7 of the bag holder 5 with the contact plate 8 interposed therebetween.

The airbag cover 10 is made of a thermoplastic elastomer such as polyolefin or styrene and has a ceiling wall 1 that covers the upper part of the folded airbag 2.
1 and a substantially rectangular cylindrical side wall portion 20 protruding downward from the lower surface of the ceiling wall portion 11.

At predetermined positions of the side wall portion 20, a plurality of mounting holes 20a for riveting the cover 10 to the side wall 7 of the bag holder 5 are formed.

As shown in FIGS. 1 and 2, the ceiling wall 11 has a thin H-shaped portion 1 to be broken which is substantially H-shaped when viewed from above.
2 are formed, and when the airbag 2 is inflated,
2 is broken to open the two door portions 13 and 14 like a double door. The hinge portions 13a and 14a at the time of opening the doors 13 and 14 are near the side wall 20 in the front-rear direction of the ceiling wall 11.

The door 14 located on the front side when the airbag device 1 is disposed on the steering wheel W.
On the surface on the side, as shown in FIGS. 1, 2 and 4, at a position away from the scheduled fracture portion 12 and at a position close to the central portion 12 a corresponding to the horizontal bar portion in the “H” shape of the scheduled fracture portion 12, An arrangement portion 15 for arranging the decorative portion 22 of the ornament 21 is provided. The disposition portion 15 is formed by disposing elliptical recesses 16 and 17 on both sides. This disposition portion 15 has assembling recesses 16 and 17
At four positions near the edge of the mounting hole 18, mounting holes 18 for penetrating four mounting legs 28, which will be described later, of the ornament 21 are formed so as to penetrate the front and back. The opening shape of each mounting hole 18 is formed in a substantially rectangular shape.

As shown in FIGS. 1 to 4, the ornament 21 includes a decorative portion 22 arranged on the surface side of the arrangement portion 15;
Four attachment legs that extend downward from the outer peripheral edge of the decorative portion 22 and penetrate through the mounting holes 18 and are bent on the back surface side of the door portion 14 to attach the decorative portion 22 to the arrangement portion 15 of the door portion 14 28.

The decoration portion 22 is provided with a decoration main portion 23 for expressing characters, patterns, and the like in a plan view, and a space portion 2 penetrating between the front and back in the arrangement region of the decoration portion 22.
6 is provided. The decorative main body 23 has an inverted U-shaped cross section so as to protrude upward, and further, as shown in FIG. 6D, a base 24 on the back side and a thin layer formed on the front side of the base 24 by painting or the like. And a decorative layer 25. As shown in FIG. 4, the thickness of the decoration main body 23 in the vertical direction is such that both lower end surfaces 23 a and 23 b in the cross section of the decoration main body 23 abut on the surface side of the arrangement portion 15 of the door 14. In such a state, the top portion 23c is dimensioned so as to substantially coincide with the general portion 14b around the arrangement portion 15 in the door portion 14.

As shown in FIG. 6A, the ornament 21 having the decorative portion 22 and the mounting leg portion 28 is made of a sheet metal material such as aluminum or stainless steel (0.5 mm in the embodiment). Aluminum plate of about thickness) P0
Is subjected to press working such as punching and drawing, and further, as shown in FIGS. 6A and 6B, surface treatment is performed so that the sharp edge portion E after press working is removed from the processed product P1. Is manufactured.

In the case of the embodiment, the surface treatment for removing the sharp edge portion E after the press working is performed by alumite treatment, electrolytic polishing treatment, chemical polishing treatment, chemical matte finish, and the like. The surface of the base 24 is appropriately subjected to painting, plating, printing, or the like, so as to provide a thin (about 10 to 60 μm) decorative layer 25 having a titanium-like, bronze-like, or chromium-like color. .

The alumite treatment is a treatment in which anodized aluminum product P1 is anodized in an electrolytic solution such as oxalic acid, sulfuric acid, chromic acid or the like. Since the surface is melted to form an oxide film, the sharp edge portion E is removed.

The electropolishing treatment is a treatment in which the product P1 after pressing is used as an anode and immersed in an electrolytic solution such as phosphoric acid while being shaken to electrolyze the product P1.
Since the surface including the sharp edge portion E is dissolved to form a glossy surface, the sharp edge portion E is removed.

Further, the chemical polishing treatment is a process of immersing the pressed product P1 in a solution of a strong acid, strong alkali, strong oxidation or the like at a predetermined temperature while shaking.
Since the product P1 melts the surface including the sharp edge portion E to form a glossy surface, the sharp edge portion E
Will be removed.

Further, the chemical satin finish is a process in which the pressed product P1 is immersed in a solution of an acid or an alkali at a predetermined temperature and lightly corroded to form a satin finish.
At this time, since the product P1 is melted so as to cut the surface including the sharp edge portion E, the sharp edge portion E
Will be removed.

Before each of the above processes, the product P1 is degreased using an alkali degreasing solution or the like.

Surface treatments such as alumite treatment, electrolytic polishing treatment, chemical polishing treatment, chemical matte finish treatment, and painting for forming the decorative layer 25 are also applied to the mounting leg portions 28 in order to save time and labor such as masking. Will be done.

When the ornament 21 manufactured as described above is to be mounted on the arrangement portion 15 of the door portion 14, first, four mounting legs extending downward from the outer peripheral edge of the decoration main body portion 23 in the decoration portion 22. The portions 28 are respectively passed through the corresponding mounting holes 18 from the front side of the door portion 14. Next, both lower end surfaces 2 in the cross section of the decoration main body 23
When the front end 28a protruding from each mounting hole 18 is bent so as to contact the rear surface of the arrangement portion 15 in a state where the ornaments 3a and 23b are in contact with the surface side of the arrangement portion 15, the ornament 21 is closed. It can be attached to the part 14.

Next, the assembling of the airbag device 1 will be described. The retainer 3 is disposed in the airbag 2, the airbag 2 is folded, and the inflator body 4a is inserted from below into the insertion hole 6a. A bolt (not shown) is inserted through the bag holder bottom wall 6 and the inflator flange 4c, and is fastened with a nut. After that, the airbag cover 10 to which the ornament 21 is attached and fixed is put on the folded airbag 2, and the side wall 20.
Is fixed to the side wall 7 of the bag holder by rivets 9 to complete the assembly.

Then, the airbag device 1 may be disposed on the steering wheel W by an attachment means (not shown) provided on the side wall 7 of the bag holder.

If the gas is discharged from the gas discharge port 4b of the inflator 4 after the steering wheel W is mounted on the automobile, the portion to be fractured 12 is pushed by the inflating airbag 2 to extend and fracture, and the door 13 is extended. 14 is opened, and the airbag 2 protrudes from the cover ceiling wall 11 and expands greatly.

When the door portion 14 is opened, in the ornament 21 of the embodiment, the mounting leg portion 28 is attached to the door portion 14 by simply penetrating each mounting leg portion 28 into each of the mounting holes 18 and bending it. With a sufficient mounting strength, the state of being mounted on the door 14 is maintained.

In the ornament 21 of the embodiment, a single sheet metal material P0 is formed by pressing, and a space 26 penetrating between the front and back is formed in the arrangement area of the decorative part 22. Therefore, the weight can be extremely reduced. As a result, even if the ornament 21 is attached to the door portion 14 simply by penetrating the four attachment legs 28 through the attachment hole 18 of the airbag cover door portion 14 and bending the rear side of the door portion 14, The ornament 21 can be easily attached to the door while securing the attachment strength according to the weight.

Further, since the decorative portion 22 is formed to have an inverted U-shaped cross section, when viewed from the front side of the airbag cover 10, the decorative portion 22 has a three-dimensional thickness.
In the decoration main body part 23 in the decoration part 22 after the press working,
Since the surface treatment for providing the decorative layer 25 is performed,
There is no decrease in decorativeness.

Further, during the surface treatment, since the sharp edge portion E after the press working has been removed, the door 14 to which the ornament 21 is attached is opened, and the occupant is
Decoration body 23 of decoration 22 in ornament 21
Even if it interferes with the end face of the mounting leg 28 or the like, it does not touch the sharp edge portion E, and can prevent the occupant from feeling unpleasant. Needless to say, the removal of the sharp edge portion E can be performed without using a polishing finish or the like separately.
Since the decoration can be performed by the surface treatment itself, the ornament 21 can be easily manufactured.

Therefore, in the airbag cover ornament 21 of the embodiment, the weight can be reduced without deteriorating the decorativeness, and as a result, the mounting legs can be secured with the mounting strength corresponding to the weight. The mounting workability of the portion 28 can be improved, and further, without increasing the number of manufacturing steps,
Even when the occupant interferes with the decorative portion 22 or the end surface of the mounting leg portion 28 when the door portion 14 of the airbag cover 21 is opened, an unpleasant feeling is not given.

In the embodiment, the space portion 26 of the decoration portion 22 is closed and completely surrounded by the decoration body portion 23. For example, the shape of the decoration body portion 23 in plan view is shown. May be a space that opens partly, such as in the case of a “C” shape.

Further, in the embodiment, the ornament 21 attached to the airbag cover 10 for the steering wheel W has been described. However, the airbag of the airbag device mounted on the front part of the passenger seat, the door, the seat, the inner wall of the vehicle, etc. If ornaments are attached to the cover, the invention can be used for those ornaments.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a use mode of an airbag cover to which an ornament according to an embodiment of the present invention is attached, and corresponds to a II portion in FIG.

FIG. 2 is a plan view of an airbag cover to which the ornament of the embodiment is attached.

FIG. 3 is a perspective view of the ornament of the embodiment.

FIG. 4 is a sectional view showing a main part of the airbag cover to which the ornament of the embodiment is attached.

FIG. 5 is a plan view showing a main part of the airbag cover of the embodiment.

FIG. 6 is a schematic partial sectional view showing a manufacturing process of the ornament according to the embodiment.

[Explanation of symbols]

 2: airbag, 10: airbag cover, 14: door, 18: mounting hole, 21: ornament, 22: decorative part, 25: decorative layer, 26: space, 28: mounting leg, P0: sheet metal Material, E: Sharp edge part.

Continuation of the front page (72) Inventor Nao Yamamoto 1 Ogatachi Ogata, Kasuga-cho, Nishi-Kasugai-gun, Aichi F-term (reference) in Toyoda Gosei Co., Ltd. 3D024 BA07 BA13 3D030 DA34 DA48 DB47 3D054 AA02 AA03 AA13 AA14 AA16 AA17 AA21 BB02 BB03 BB30 EE19 EE20 FF14 FF17 FF20

Claims (1)

[Claims] 1. A decoration which is attached to the door portion of an airbag cover having a door portion which covers the folded airbag and opens when the airbag is inflated, and which is arranged on a surface side of the door portion. And a plurality of mounting legs that extend downward from the decorative portion, penetrate through the mounting hole of the door portion, and are bent on the back surface side of the door portion to attach the decorative portion to the door portion. An ornament for an airbag cover configured to include: a space that penetrates the front and back sides in an arrangement area of the decoration part in the decoration part, and a cross-section of the decoration part is formed into an inverted U-shape. The decorative portion and the mounting leg portion are formed by pressing a single sheet metal material, and further, by a surface treatment for decorating the decorative portion after the pressing, the sharp edge after the pressing is formed. Parts have been removed An ornament for an airbag cover, characterized by: