JP3319969B2 - Cover body 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 cover body of an airbag device for covering an inflating and deploying airbag.

[0002]

2. Description of the Related Art Conventionally, an airbag device has been used for protecting an occupant against an impact such as a vehicle collision. And, for example, an airbag device for a driver is provided at a portion of a center pad of a steering wheel, and an inflator that injects gas, an airbag that is inflated and deployed by the gas that is injected by the inflator, and an airbag that is folded and stored. A cover body for covering the bag;
In the event of a car collision, the airbag is inflated by the pressure of the gas injected from the inflator,
The cover body made of a soft resin is cleaved and opened in a door shape to form a projecting opening of the airbag, and the airbag is projected from the projecting opening and inflated and deployed on the front of the occupant.

Conventionally, a center pad that does not have a built-in airbag for a steering wheel has a structure in which a separate decorative plate, for example, an emblem or a badge, is attached to enhance the decorative effect.

When the center pad portion is used as a place having an airbag device, in order to enhance the decoration effect, a mark portion (decoration) is integrally formed on a cover made of a soft resin for accommodating the airbag. ) Is used. However, in this configuration, the mark portion has the same appearance as the texture of the entire cover body in terms of color tone, gloss, and the like, and has a problem that the decorative effect is poor. In particular, while the area of the center pad is large to accommodate the airbag, the mark that should be used as an accent to attract the viewer's gaze has no presence, so the surface appearance is plenty, and the volume of the center pad area is large. Has problems that may be emphasized.

[0005] In this respect, for example, Japanese Patent Application Laid-Open No. 7-257309.
As described in Japanese Patent Application Laid-Open Publication No. H10-209, there is known a configuration in which a separate emblem is inserted into a mold in advance and formed integrally with a cover body. However, in the configuration described in this publication, it is necessary to insert the emblem at an accurate position of the mold, and there is a problem that the manufacturing process becomes complicated. That is, if the emblem is not placed correctly,
Or, if the position of the emblem insert is not accurate, such as when the position of the emblem moves in the process of closing the mold, the alignment accuracy of the insert and the mold will be impaired, causing resin burrs, There is a problem that a finishing process is required, or a mold is damaged and repair is required, thereby lowering productivity and increasing maintenance costs. Furthermore, in the case of insert molding,
The emblem itself to be inserted also needs a predetermined dimensional accuracy. If the dimension exceeds a predetermined range (upper limit value), the mold may be damaged or deformed, while the dimension may exceed a predetermined range (lower limit value). ), There is a problem that resin burrs are generated. Furthermore, in order to mold an emblem with high dimensional accuracy by combining a plurality of resins, meticulous process control is required. If this process control is insufficient, the yield will deteriorate and the manufacturing cost will increase. are doing.

Further, the cover body of the airbag apparatus is resistant to light such as ultraviolet rays, temperature conditions from low to high temperatures, and the chemical effects of being touched by a driver or the like, while maintaining the air quality for the life of the vehicle. In order for the bag to protrude smoothly, it is necessary to maintain the ability to smoothly rupture and deploy. For this reason, the cover body is usually coated with a thin film covering the surface. For example, when a so-called in-mold coating method is used, in which a thin film is formed in a molding die in advance and transferred to a molded product at the same time as molding, an emblem is used. The thin film forming material (paint) adheres to the surface and becomes dirty, making the production difficult.
On the other hand, when using a so-called after-coating method of applying a thin film after molding, in the process of removing oil such as a release agent on the surface of a molded product, a solvent comes into contact with a resin or the like that constitutes the emblem, resulting in so-called whitening. May cause chemical cracks, etc., require a proper selection of the degreasing solvent, and may make the process design difficult.In addition, it is necessary to mask the emblem so that the paint for the aftercoat does not adhere. There is also a problem that a complicated operation is required and the manufacturing cost is increased.

[0007]

As described above, the structure in which the mark portion is integrally provided on the cover body has a problem that the decorative effect is poor. Further, in the configuration in which the decorative member is insert-molded on the cover body, a complicated operation is required, and there is a problem that the manufacturing cost is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cover of an airbag device which can improve the decorative effect and reduce the manufacturing cost.

[0009]

According to a first aspect of the present invention, there is provided an airbag device comprising a cover for covering the airbag, and decorative means attached to the cover, wherein the cover is provided on a front side. The insertion means is inserted from the rear surface side to the decoration means, the decoration means, the mounting body disposed on the front surface side of the covering portion, a decorative body attached to the mounting body, and the insertion portion is inserted through the mounting body A connected body that is connected to hold the mounting body on the covering portion, and the decorative body is the mounting body.
And a body that covers the front side of the
And an extending portion that engages with the mounting portion .

In this configuration, the decorative body can be formed separately from the covering portion, and various materials can be selected as long as the decorative body can be attached to the mounting body, and the decorative effect is improved. Further, since the decorative means is attached after forming the covering portion, the manufacturing is easier than in the case of insert molding or the like, and the manufacturing cost is reduced.

According to a second aspect of the present invention, there is provided a cover body for an airbag device, wherein the cover body of the airbag device according to the first aspect further comprises a holding member disposed on the back side of the covering portion. Is connected to.

In this configuration, the covering portion is sandwiched between the attachment body to which the decorative body is attached and the holder, and the decorative means is firmly fixed to the covering portion.

According to a third aspect of the present invention, there is provided the cover body of the airbag apparatus according to the first or second aspect, wherein the decorative body includes a main body that covers a surface side of the mounting body;
And an extending portion extending from the main body and abutting on the back surface side of the mounting body.

In this configuration, the attachment is sandwiched between the main body and the extension, and the decorative body is firmly attached to the attachment.

According to a fourth aspect of the present invention, there is provided the cover body of the airbag apparatus according to the third aspect, wherein the covering portion has a break portion that breaks when the airbag is deployed, and the decorative body extends. The portion is provided near the break portion.

In this configuration, when the cover body is deformed when the airbag is deployed, the extended portion is provided in the vicinity of the broken portion where the amount of deformation is large, so that the decorative body is attached when the airbag is deployed. It is firmly held by the body.

According to a fifth aspect of the present invention, there is provided a cover for an airbag apparatus according to any one of the first to fourth aspects, wherein the cover is located between the decorative body and the mounting body. A support means for supporting the body is provided.

In this configuration, deformation of the decorative body such as when the decorative body is pressed is suppressed, and the appearance is favorably maintained. Further, the thickness of the decorative body can be reduced, and the weight can be easily reduced.

According to a sixth aspect of the present invention, the cover of the airbag apparatus according to any one of the first to fifth aspects is arranged such that the cover is located between the decorative body and the mounting body. Is provided with support means capable of absorbing the water.

With this configuration, the impact applied to the decorative body of the decorative means is easily absorbed.

According to a seventh aspect of the present invention, there is provided a cover body of the airbag apparatus according to the fifth or sixth aspect, wherein the support means is formed integrally with at least one of the mounting body and the covering portion. It is.

In this configuration, the configuration is simplified and the manufacturing cost is reduced.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cover of an airbag device according to the present invention will be described below with reference to the drawings.

2 and 3, reference numeral 1 denotes a steering wheel of an automobile, which is a vehicle. The steering wheel 1 has a steering wheel main body 2 and an air attached to a center pad portion of the steering wheel main body 2 on the occupant side. And a bag device (airbag module) 3. The steering wheel 1 is mounted on a steering shaft which is normally provided in an inclined state. Hereinafter, the side of the airbag device 3 which is the occupant is on the upper side (front side), and the steering wheel (not shown) which is on the vehicle body side. The description will be made with the shaft side being the lower side.

The steering wheel body 2
Is an annular rim portion (ring portion) 5 which is a grip steering portion,
A boss portion (pad portion) 6 located inside the rim portion 5
And three spokes 7 connecting the rim 5 and the boss 6 so that the vehicle can be steered. A boss fitted to the steering shaft is arranged below the boss portion 6, and a boss plate is formed integrally with this boss or formed separately and fixed thereto. Further, the core metal 7a of the spoke portion 7 is connected to the boss plate, and the core metal 7a of the spoke portion 7 is provided.
Is connected to the core metal 5a of the rim portion 5. Further, a skin portion 8 made of a soft synthetic resin or the like is formed on an outer peripheral portion of the core metal 5a of the rim portion 5 and an outer peripheral portion of a portion of the core metal 7a of the spoke portion 7 on the rim portion 5 side. . Further, the lower side of the boss 6 is covered with a lower cover 10.

The airbag device 3 includes a metal base plate 11, and the base plate 11 is attached to a boss plate of the steering wheel body 2 by a screw or the like via a bracket or the like. And
The base plate 11 includes an upper plate portion 11a and the upper plate portion 11a.
A peripheral wall portion 11b, which is bent downward and partially upward from the peripheral edge portion of the upper plate portion 11a, is formed.
11a, a circular inflator mounting hole 11c and a plurality of mounting through holes located around the inflator mounting hole 11c are formed. And this inflator mounting hole
An inflator that injects gas into the 11c from below
An airbag 14 is attached to the upper surface of the upper plate 11a in a small folded state so as to cover the upper side of the inflator 12.

The inflator 12 has a substantially cylindrical main body 12a, and a plurality of gas injection ports 12b are formed at predetermined intervals on an outer peripheral portion of an upper portion of the main body 12a. Further, a flange portion 12c protrudes from the outer periphery of the main body portion 12a, and a plurality of mounting through holes are formed in the flange portion 12c.

The airbag 14 is provided with an inflator
The outer edges of an annular lower cloth material having an opening 14a through which the upper part of 12 is inserted and an upper cloth material having a circular shape with the same outer diameter as the lower cloth material are stitched together. And is formed in a bag shape. A plurality of mounting holes are formed around the opening 14a. In addition, airbags 14
An annular retainer 16 for pressing the opening 14a of the airbag 14 is inserted inside the airbag. And retainer 16
At the same time, the airbag 14 is fixed to the upper plate portion 11a of the base plate 11 using rivets, and a plurality of bolts 16a attached to the retainer 16 are respectively attached to the mounting holes of the airbag 14 and the upper surface of the base plate 11. Plate 11
(a) and the mounting hole of the inflator 12 in order, and the nut 18 is screwed from the lower surface of the flange portion 12c.
Are integrally fastened and fixed to the base plate 11.

Further, a cover body (airbag cover, case body) 20 is attached to the base plate 11 so as to cover the folded airbag 14. The cover body 20 has a cover body 21 formed of a synthetic resin. The cover body 21 is integrally formed by, for example, an injection molding method using a synthetic resin such as a thermoplastic elastomer. The cover body 21 includes a covering portion 22 that covers a part of the boss portion 6 and the spoke portion 7 in which the airbag 14 is housed, and a substantially rectangular cylindrical shape projecting downward from the back surface of the covering portion 22. And a mounting wall portion 23.

The cover portion 22 of the cover body 21 has a tear line 24 as a breakable portion which is more fragile than other portions of the cover portion 22.
Are formed. The tear line 24 is formed in a thin shape by recessing the back surface side of the covering portion 22 in a groove shape.
A center break line 24a that crosses the vicinity of the center in the front-rear direction of both sides in the both sides, and the covering portion 22 connected to the center break line 24a.
A pair of side break lines extending in the front-rear direction near both sides of the
24b form a substantially H-shaped plane. A curved portion 24c is formed in a central portion in the longitudinal direction of the center break line 24a and is curved in the shape of a plane arc toward the near side. The tear line 24 defines a pair of front and rear door pieces 25a and 25b in a portion surrounded by the mounting wall 23 of the covering portion 22.

The cover body 21 is attached to the mounting wall 23
Is fitted to the outside of the peripheral wall portion 11b of the base plate 11 and the like, and the rivets R are inserted into the through holes formed in the mounting wall portion 23 and the peripheral wall portion 11b, and caulked, so that the mounting wall portion 23 is Are fixed to the peripheral wall portion 11b and attached to the base plate 11.

Further, as shown in FIGS. 1 to 3, an emblem mounting portion 28 is formed integrally with the cover main body 21 at a substantially central portion of the cover portion 22, and the emblem mounting portion 28 is provided with the cover main body 21 and the cover main body 21. Is a separate airbag decorative part (decorative item)
An emblem 31 as a decorative means is attached.

The emblem mounting portion 28 is formed with a disc-shaped recess 28a in which the surface of the covering portion 22 is formed in a disc shape, and a central portion of the disc-shaped recess 28a has a front side. A penetrating portion 28b having a constant diameter and penetrating from the rear side to the rear side is formed. Further, a positioning boss 28c is projected from the disc-shaped recess 28a. The emblem mounting portion 28 is provided adjacent to the front side of the curved portion 24c of the tear line 24.
Are formed so as to bypass the emblem mounting portion 28.

The emblem 31 includes a substantially disc-shaped decorative body 32, a mounting body 33, and a holding body 34, and a single pin 35 in the present embodiment as a connecting body.

The decorative body 32 is also called an outer, a decorative covering, an aluminum ornament, or the like. For example, an aluminum alloy or copper plate is pressed to form a flat circular main body part 32a and a main body 32a. A low-length cylindrical portion (outer peripheral flange) 32b extending downward from the outer peripheral edge of the portion 32a, and a plurality of, ie, two or more, four in this embodiment, further extending from the cylindrical portion 32b. An engaging claw (bent piece) 32c is formed as a set part. And the main body 32
a is a flat plate or a curved surface that bulges upwards. The main body 32a is formed by processing characters, figures, logos, or the like into projections or depressions. It is decorated with such. Also, from the roots on both sides of one engaging claw 32c located on the front side,
Cut portions 32d, 32d are formed to extend upward to about half the height of the cylindrical portion 32b. In addition,
The inner diameter of the disc-shaped concave portion 28a of the covering portion 22 is formed substantially equal to the outer diameter of the decorative body 32.

The mounting body 33 is also called an inner plate or a holding plate, and includes a disk-shaped substrate 33a made of an aluminum alloy, a steel plate, or the like. It is formed substantially equal to the inner diameter of the portion 32b. A tapered hole 33b is formed in a central portion of the substrate 33a so as to taper upwardly, that is, toward the surface.
A positioning hole 33c is formed on one side of the tapered hole 33b. The positioning hole 33c has a circular shape having a constant diameter along the axial direction. Further, a cutout portion 33d is formed in the outer peripheral portion of the substrate 33a at a position substantially opposite to the positioning hole 33c with the tapered hole 33b interposed therebetween.

The pin 35 is also called a mounting pin, a shaft, a leg, or the like, and has a base end (upper end).
A head portion 35a is formed to increase in diameter in an upward tapered shape, and a shaft portion (straight portion) 35 is formed below the head portion 35a.
b is projected in a columnar shape. An annular groove, that is, a small-diameter portion 35c having a small diameter is formed near the lower end of the shaft portion 35b, and a lower portion of the small-diameter portion 35c has a locking portion having the same diameter as the shaft portion 35b. It is part 35d.

Further, the holding body 34 includes a stopper, a retaining ring,
It is also called a fixing member or the like, and has a disk-shaped substrate 34a made of a spring steel material.The substrate 34a has an insertion hole 34b formed in the center thereof, and faces the center of the insertion hole 34b. A plurality of locking pieces 34c are formed to be inclined downward from the peripheral edge of the insertion hole 34b.

Next, a process of attaching the emblem 31 to the covering portion 22 of the cover body 21 will be described.

First, the cover body 21 is degreased in advance, and a coating film such as polyurethane is applied.

In the emblem 31, first, the pin 35 is inserted into the tapered hole 33b of the mounting body 33 from above, and the head 35a
Is engaged with the tapered hole 33b, and the pin 35 is
From the state. Subsequently, as shown in FIG. 4, the decorative body 32 is fitted from above the mounting body 33, and further, as shown by a broken line in FIG. 4, each engaging claw 32c is bent inward to wrap the mounting body 33. The decorative body 32 is attached as described above. At this time, the engaging claw 32c having the cut portions 32d, 32d formed on both sides is engaged with the notch 33d of the mounting body 33,
The positioning between the 33 and the decorative body 32 in the circumferential direction is performed, and the relative rotation is prevented.

Subsequently, a member obtained by combining the decorative body 32, the mounting body 33, and the pin 35 is attached to the covering portion of the cover body 21.
It is attached to the emblem attachment part 28 of 22 from above. That is, the pin 35 is inserted into the insertion portion 28b of the emblem mounting portion 28, and the boss 28c is inserted into the positioning hole 33c to perform positioning with the cover main body 21 while the decorative body 32 and the mounting body 33 are inserted into the disc-shaped recess 28a. To fit.

Further, a pin protruding from the back side of the covering portion 22
When the insertion hole 34b of the holder 34 is aligned and pressed into the distal end side of the holder 35 from the back side, the locking piece 34c of the holder 34 is inserted into the small-diameter portion 35c of the pin 35, and is inserted into the locking portion 35d. Abut,
The holding body 34 is locked to the pin 35.

In this state, the mounting body 33 and the holding body 34 are connected via the pin 35, and the mounting body 33 and the holding body 34 are connected.
34 and the body portion of the decorative body 32.
The mounting body 33 is sandwiched between 32a and the engagement claw 32c, and further,
The engaging claw 32c of the decorative body 32 is sandwiched between the mounting body 33 and the covering portion 22, so that the emblem 31 is firmly fixed to the covering portion 22.

In this state, one of the engaging claws 32c, which is a holding point of the decorative body 32, is located closest to the rear end of the emblem 31, that is, the curved portion 24c of the tear line 24.
It comes into contact with the covering portion 22.

Next, the deployment operation of the airbag device 3 will be described.

First, when a vehicle collides, for example, a collision diagnosis unit (not shown) detects an impact received by the vehicle body, and the igniter of the inflator 12 is activated to burn the charged propellant, thereby causing the inflator 12 to burn. Nitrogen gas or the like is rapidly injected into the airbag 14 from a gas injection port 12b formed on the peripheral surface of the
Expands rapidly. Then, due to the pressure of the inflation of the airbag 14, the covering portion 22 of the cover body 20 is pressed from the inside and deformed, and the tear line 24 is moved to a predetermined portion, for example, a curved portion.
Break from 24c. Subsequently, the rupture proceeds along the tear line 24 due to the pressure of the inflation of the airbag 14, and the covering portion 22
Is cleaved to form a pair of front and rear door pieces 25a and 25b.
Further, when the airbag 14 is further inflated, the door pieces 25a and 25b are deployed back and forth while the emblem 31 is held by the front door piece 25a to form a projecting opening of the airbag 14. The airbag 14 protrudes outward through the projecting opening, and is inflated and deployed between the occupant and the steering wheel body 2 so as to reduce the impact applied to the occupant.

According to the present embodiment, the decorative part 32 is attached to the covering part 22 of the cover body 20 that covers the airbag 14, so that the decorative part 32 is attached to the covering part 22. Compared to a configuration in which the cover body 20 is integrally formed, the appearance of the cover body 20 that tends to be monotonous is effectively decorated to improve the appearance,
It is possible to enhance the decorativeness of the interior of the vehicle and thereby enhance the merchantability of the vehicle.

The emblem 31 includes a mounting member 33 and a holding member.
34 and the body portion of the decorative body 32.
The mounting body 33 is sandwiched between the engaging body 32a and the engaging claw 32c, and in particular, the engaging claw 32c of the decorative body 32 is sandwiched between the mounting body 33 and the covering part 22 to operate the airbag device 3. Around the back and forth
The emblem 31 can be firmly and securely held on the emblem 22.

Therefore, as compared with a configuration in which insert molding is performed, the separate emblem 31 can be easily attached after the molding and post-processing of the cover body 21 are all completed, so that the appearance can be improved and the appearance can be improved. In addition, the manufacturing process can be simplified, the workability and the process yield can be improved, and the manufacturing cost can be reduced.

The engaging claw 32c which is a holding point of the decorative body 32
Is located closest to the rear end of the emblem 31, that is, the curved portion 24c curved along the emblem 31, and is disposed so as to abut on the covering portion 22. Therefore, when the airbag device 3 is operated, the engaging claw 32c is pressed toward the mounting body 33 by the airbag 14 which is inflated from the inside during deployment.
Even if the distortion of the covering portion 22 of the
The attachment 32 can be securely held by the attachment 33. further,
Since the emblem 31 is arranged along the curved portion 24c of the tear line 24, the portion of the covering portion 22 located on the front side of the curved portion 24c can be prevented from being deformed so as to protrude, and the tear line 24 can be broken. It can be generated effectively.

In the above embodiment, the emblem
31 decoration body 32, mounting body 33, holding body 34, and pin 35,
Although each is formed separately, for example, a pin can be formed integrally with the attachment body, or a plurality of pins can be used.

In the above embodiment, the decoration 32
Are mounted on the mounting body 33 by bending the engaging claws 32c made of a metal plate, but the decorative body 32 and the mounting body 33 can be formed into various shapes using members of various materials.
Various methods can be employed for fixing the mounting member 33 to the mounting member 33. For example, on the upper surface of the mounting body, a predetermined stamp or a printing film is bonded and combined, and the decorative body is made of a resin material having high mechanical strength such as a polycarbonate sheet. By doing so, it can be softened and deformed, and similarly to the above-mentioned engaging claw 32c, it can be wrapped around the lower surface side of the mounting body and fixed. In addition, the resin member such as the polycarbonate sheet can be variously deformed, for example, by applying heat suction molding (vacuum molding) or the like in accordance with a figure such as a print film to give irregularities to give a three-dimensional effect. .

In the above-described embodiment, the decorative body 32 and the mounting body 33 are in close contact with each other, or the space between the decorative body 32 and the mounting body 33 is formed in a hollow shape. In the case of swelling, for example, a support means is separately provided in the space between the decorative body 32 and the attachment body 33 or integrally with any member, and abuts or faces the lower surface of the decorative body 32,
The decorative body 32 can be supported or a shock can be absorbed. Hereinafter, the same components as those shown in FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof is omitted.

For example, as in the second embodiment shown in FIG. 5, in a configuration in which the main body 32a of the decorative body 32 swells in a substantially spherical shape, the space between the decorative body 32 and the mounting body 33 is A separate elastic body (impact absorbing elastic body) 51 can be provided as a support means. The elastic body 51 is also referred to as an anchor or the like, and is integrally formed in a disc shape from rubber or an olefin-based elastomer having a predetermined shock absorbing property. Further, the upper surface of the elastic body 51 is in contact with the lower surface of the decorative body 32 or opposed with a small space therebetween, and the lower surface is formed in a planar shape in contact with the upper surface of the mounting body 33.

According to the second embodiment,
Since the elastic body 51 having a predetermined shock absorbing property is arranged in the space between the decorative body 32 and the mounting body 33, the shock absorbing property of the cover body 20 can be easily improved. Further, since the decorative body 32 can be supported by the elastic body 51, deformation such as dents of the decorative body 32 can be suppressed, the degree of freedom of appearance can be improved, and a good appearance can be maintained. Further, since the decorative body 32 can be supported by the elastic body 51, the strength of the decorative body 32 can be reduced. For example, the thickness of the decorative body 32 can be reduced, the weight of the cover body 20 can be reduced, and the shock absorbing property can be reduced. Can also be improved.

Further, for example, the third type shown in FIGS.
As in the embodiment, the support piece 33e and the support rib 28e as support means may be integrally formed in the disc-shaped concave portion 28a of the emblem mounting portion 28 of the mounting body 33 and the cover body 21. That is, the support body portion is formed by bending a portion integrally extending from a plurality of portions of the outer peripheral portion into a substantially U-shaped cross section in accordance with a shape in which the engaging claw 32c of the decorative body 32 can be bent. 33e are formed to support the vicinity of the outer peripheral portion of the lower surface of the decorative body 32. The emblem mounting portion 28 is provided with a plurality of elastically deformable support ribs 28e projecting upward from the disc-shaped concave portion 28a, and comes into contact with the lower surface of the decorative body 32 or faces the decorative body 32 with a slight space therebetween. The body 32 is supported near the center. Also, each support rib
Each of the support ribs 28e has a circular arc shape and is arranged along a plurality of concentric circles centered on an insertion portion 28b at the center of the disc-shaped concave portion 28a.
One can be selected as appropriate, such as a single substantially C-shaped plane centered at 28b. Further, the mounting body 33 is formed with a plurality of rib insertion holes 33f through which the support ribs 28e can be inserted, and the center portion is replaced with a tapered hole 33b.
33g mounting hole with a fixed diameter penetrating from the front side to the back side
Are drilled. In the present embodiment, the rivet 55 is used as the connecting body and the holding body, and the mounting body 33 is inserted into the insertion portion 28b and the mounting hole 33g from the back side of the cover main body 21 and caulked, so that the mounting body 33 is formed. Cover body 21
It is fixed to.

Further, as in the fourth embodiment shown in FIGS. 8 and 9, for example, a support means for supporting the decorative body 32 on an attachment body (resin ornament base) 33 formed of resin or the like. The supporting rib 33h can be integrally formed. The support rib 33h is formed around the center mounting hole 33g except for the positioning hole 33c.
It is formed in a plurality of concentric circles. In the fourth embodiment, a plurality of locking portions 33i are integrally provided to project upward from the vicinity of the outer peripheral portion of the substrate 33a of the mounting body 33, and each of the locking portions 33i has an outer peripheral portion. A claw portion 33j is formed toward the side, and a rectangular locking hole 32e is formed in each of the engagement claws 32c of the decorative body 32. Therefore, the claw part 33j of the locking part 33i is only required to cover the decoration body 32 on the mounting body 33.
Are locked in the locking holes 32e of the engaging claws 32c, so that the decorative body 32 can be easily fixed to the mounting body 33. Also in the fourth embodiment, the shock absorbing characteristics can be easily improved by forming the attachment body 33 from a material having the predetermined shock absorbing characteristics.

According to the third and fourth embodiments, in addition to the effects of the above-described embodiments, the lower surface of the decorative body 32 can be supported without increasing the number of parts. It can be simplified and the manufacturing cost can be reduced. Further, since a space is secured between the decorative body 32 and the attachment body 33, the rivet 55 can be easily used for caulking. Further, by forming the support piece 33e on the attachment body 33 in correspondence with the position of the engagement claw 32c of the decorative body 32, during the bending work in the work of attaching the engagement part 32c to the attachment body 33, The support piece 33e can support the portion near the engaging claw 32c. Therefore, even if the decorative body 32 is made thin, distortion due to bending can be suppressed, and the appearance can be improved.

In each of the above embodiments, the airbag device 3 mounted on the steering wheel body 2 has been described. However, the shape and the mounting position of the airbag device are not limited to those described above. Applicable to the airbag device for the passenger in the passenger seat built in the panel, the airbag device for the rear seat built in the front seat back, or the airbag device provided next to the door or the seat for side collision You can also.

[0061]

According to the cover body of the airbag device according to the first aspect, since the decorative body can be separated from the covering portion and various materials can be selected as long as the decorative body can be attached to the mounting body. The decoration effect can be easily improved. Furthermore, since the decoration means can be attached after the formation of the covering portion, the production is easier than in the case of insert molding or the like, and the production cost can be reduced.

According to the cover body of the airbag device of the second aspect, in addition to the effect of the first aspect, the covering portion is sandwiched between the mounting body to which the decorative body is attached and the holder, and the decorative means is covered by the covering portion. Can be fixed firmly.

According to the cover body of the airbag device of the third aspect, in addition to the effects of the first or second aspect, the mounting body is sandwiched between the main body and the extension of the decoration body, and the decoration body is mounted. Can be firmly attached to the body.

According to the cover of the airbag device of the fourth aspect, in addition to the effect of the third aspect, in addition to the effect of the third aspect, when the airbag is deployed, the extended portion extends to a portion close to the breakage portion where the amount of deformation of the cover increases. The decorative body is firmly held by the mounting body when the airbag is deployed, since the mounting body is sandwiched between the extended portion and the main body.

According to the cover body of the airbag device of the fifth aspect, in addition to the effects of any one of the first to fourth aspects, the support for supporting the decorative body is located between the decorative body and the mounting body. Since the means is provided, deformation of the decorative body such as when the decorative body is pressed can be suppressed, and the appearance can be favorably maintained. Further, the thickness of the decorative body can be reduced, and the weight can be easily reduced.

According to the cover body of the airbag device of the sixth aspect, in addition to the effect of any one of the first to fifth aspects, the support capable of absorbing an impact is located between the decorative body and the mounting body. Since the means is provided, it is possible to easily absorb the impact applied to the decoration body of the decoration means.

According to the cover body of the airbag device of the seventh aspect, in addition to the effect of the fifth or sixth aspect, the support means is formed integrally with at least one of the mounting body and the covering portion, so that the configuration is simplified. And manufacturing costs can be reduced.

[Brief description of the drawings]

FIG. 1 is a partially exploded perspective view showing an embodiment of a cover body of an airbag device of the present invention.

FIG. 2 is a plan view of a steering wheel provided with the airbag device.

FIG. 3 is a sectional view of the steering wheel, taken along the line II in FIG. 2;

FIG. 4 is a perspective view showing the manufacturing process of the cover body of the airbag device as viewed from the back surface of the decorative body.

FIG. 5 is a partial exploded perspective view showing a second embodiment of the cover body of the airbag device of the present invention.

FIG. 6 is a partial exploded perspective view showing a third embodiment of the cover body of the airbag device of the present invention.

FIG. 7 is a sectional view taken along the line II-II of FIG.
It is sectional drawing.

FIG. 8 is a partial exploded perspective view showing a fourth embodiment of the cover body of the airbag device of the present invention.

FIG. 9 is a sectional view of the cover body of the airbag device of FIG.
It is III sectional drawing.

[Explanation of symbols]

 Reference Signs List 3 airbag device 14 airbag 20 cover body 22 covering part 24 tear line as a break part 28b insertion part 28e support rib as supporting means 31 emblem as decorative means 32 decorative body 32a main body part 32c engaging claw as extended part 33 Mounting body 33e Supporting piece as supporting means 33h Supporting rib as supporting means 34 Holding body 35 Pin as connecting body 51 Elastic body as supporting means

Continuation of the front page (56) References JP-A-9-175304 (JP, A) JP-A-10-6903 (JP, A) JP-A-8-310331 (JP, A) JP-A 8-268202 (JP) , A) JP-A-7-257309 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60R 21/16-21/32

Claims (7)

(57) [Claims] 1. A covering part for covering an airbag, and a decoration means attached to the covering part, wherein the covering part includes an insertion part penetrating from a front side to a back side, and the decoration means comprises: A mounting body is provided on the surface side of the covering portion, a decorative body attached to the mounting body, and a connecting body inserted through the insertion portion and connected to the mounting body to hold the mounting body to the covering portion. The decoration body includes a main body that covers a surface side of the attachment body;
Extending from the outer peripheral edge of the main body and engaging with the mounting portion.
Cover of the airbag apparatus is characterized in that a portion. 2. The cover body for an airbag device according to claim 1, further comprising a holding member disposed on the back side of the covering portion, wherein the connecting member is connected to the holding member. 3. The decorative body according to claim 1, further comprising: a main body covering the front side of the mounting body, and an extending part extending from the main body and abutting on the back side of the mounting body. Or a cover body of the airbag device according to 2. 4. The air according to claim 3, wherein the covering portion has a break portion that breaks when the airbag is deployed, and the extending portion of the decorative body is provided near the break portion. Cover body for bag device. 5. Located between the decorative body and the attachment body, the airbag apparatus according to item 1 4 any claims 1, characterized in that supporting means for supporting is provided with a decorative body Cover body. 6. positioned between the ornamental body and the attachment body, the airbag apparatus according to claims 1, characterized in that the absorbable support means provided with impact 5 any one Cover body. 7. A cover body for an airbag device according to claim 5, wherein the support means is formed integrally with at least one of the mounting body and the covering portion.