JPH0911838A - Cover body of air bag device - Google Patents

Abstract

PURPOSE: To enhance a decorative effect, and easily manufacture a cover body by providing a locking member which is arranged on the reverse side of a covering part and is engaged with a leg part. CONSTITUTION: A decorative part installing part 28 is integrally formed in an almost central part of a covering part 22 of a cover main body 21, and a decorative part 31 is installed in this decorative part installing part 28. The decorative part 31 is composed of a decorative body 33 being an annular ring plate shape, a plate 34 as a locking member being an almost circular shape with this decorative body 33, plural shafts 35 constituting a leg part and plural retaining rings 36 as slipping-out preventive members. When the metallic decorative body 33 of a separate member from this covering part 22 is installed on the surface side of the resinous covering part 22 of a cover body to cover an air bag 14, since a decorative effect can be enhanced more than the constitution that a decorative part is integrally formed in the covering part 22, decorativeness in a cabin can be enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover body for an airbag device to which decorative parts are attached.

[0002]

2. Description of the Related Art Conventionally, an inflator for injecting gas,
An airbag device including an airbag that is inflated and deployed by this gas and a cover body that covers the airbag is used. The airbag is housed inside the cover body in a small folded state, and is expanded by the pressure of the gas injected from the inflator in the event of a vehicle collision or the like, and the cover body is covered with a soft resin. The parts are torn apart and deployed on the front of the occupant. Further, this airbag device is, for example, an airbag device incorporated in a pad body at the center of a steering wheel in order to protect a driver of a vehicle from the impact of a collision,
Airbag device built into the instrument panel for passengers in the passenger seat, airbag device built in the seat back of the front seat for the rear seat, or airbag device installed at the door or side of the seat for side collision Various forms have been developed and put into practical use.

In this type of airbag device,
For the purpose of decoration, decoration mark such as logo mark or car name,
2. Description of the Related Art There is known a configuration in which an airbag device is formed integrally with a cover portion of a cover body.

However, in the structure in which the decorative mark is formed integrally with the cover body, the decorative mark has the same texture and color tone of the entire cover body, and therefore, there is a problem that it is not noticeable and the decorative effect is poor. .

Further, when such a decorative mark is constituted by a decorative part which is separate from the covering portion of the cover body,
It is necessary to firmly attach the decorative component to the soft resin covering portion that deploys at high speed when the airbag device operates.

In this respect, for example, the structure described in Japanese Utility Model Laid-Open No. 2-66353 is known. Further, in this configuration, a plate of another member serving as a decoration mark is attached to the surface of the cover portion of the cover body, and the hook portion of the locking portion projecting from the plate is attached to the reinforcing net embedded in the cover portion. It is adapted to engage and attach the plate to the cover of the cover body.

However, this actual Kaihei 2-66353
The configuration described in the publication can be applied only to the cover body in which the reinforcing net is integrally embedded in the covering portion, and has a problem that the applicable range is narrow.

Further, for example, the structure described in Japanese Patent Laid-Open No. 5-139231 is known. In this configuration, a part of the decorative component that is a separate member is embedded and fixed in the covering portion of the cover body. In this decorative component, the decorative portion exposed on the surface side of the covering portion and the decorative portion And a base portion formed around. A plurality of through holes are formed in the base portion, and the decorative mark can be surely attached to the covering portion by insert molding so that the base portion is embedded in the covering portion.

However, this Japanese Patent Laid-Open No. 13923/1993
In the configuration described in Japanese Patent No. 1, since the decorative component is insert-molded in the covering portion of the cover body, there is a problem that the positioning process and the finishing process of the decorative component are complicated. That is, in general, when insert molding is performed in injection reaction molding of polyurethane, a step of applying at least one kind of a coating agent and a mold release agent to the cavity surface of the mold is required, and the decorative part is preliminarily placed in the mold. Since the decorative part of this decorative part is soiled by a coating agent or the like, it is necessary to remove the stain on the decorative part by finishing after molding. Further, when the surface of the decorative portion and the surface of the mold are not in airtight contact with each other during molding, the polyurethane resin enters the space formed between the surface of the decorative portion and the surface of the mold. . Then, since the decorative portion is covered with a thin film of polyurethane resin, this film needs to be removed in a later step, and there is a problem that the number of working steps increases and the variation in the finish of the appearance increases. . Even when a thermoplastic resin is used instead of polyurethane resin, when insert molding is performed, burrs, etc. are generated at the boundary (partition line) between the peripheral edge of the decorative component and the cover body, and this is removed. Therefore, there is a problem that the number of work steps increases and the variation in the finish of the appearance increases.

[0010]

As described above, in the structure in which the decorative mark is formed integrally with the cover body, the decorative mark has the same texture and color tone as the entire cover body, so that the decorative mark is less noticeable and has a decorative effect. Have the problem of being scarce. Further, the decorative mark is a plate separate from the covering portion, and the reinforcing net embedded in the covering portion of the cover body is engaged with the hook portion of the locking portion projecting from the plate, so that the plate becomes the cover body. In the structure of attachment, it can be applied only to the cover body in which the reinforcing net is integrally embedded in the covering portion, and there is a problem that the applicable range is narrow. In addition, in the configuration in which the decorative component of a separate member is insert-molded on the cover body, the decorative component is easily soiled and burrs are generated, so that it is difficult to improve the appearance, and the work of removing the stains and burrs is complicated. Have a problem.

The present invention has been made in view of the above points, and an object of the present invention is to provide a cover body for an airbag device which has a high decorative effect and can be easily manufactured.

[0012]

According to a first aspect of the present invention, there is provided a cover body for an airbag device, comprising: a covering portion for covering the airbag; and a decorative component attached to the covering portion, the decorative component being the aforementioned one. A decorative body arranged on the front surface side of the covering portion, a leg portion protruding from the decorative body and penetrating the covering portion, and a locking member arranged on the back surface side of the covering portion and coupled to the leg portion. It is equipped with.

According to a second aspect of the present invention, there is provided a cover body for an airbag apparatus according to the first aspect, wherein the locking member has a plate-like shape that comes into planar contact with the back side of the covering portion. Is.

According to a third aspect of the present invention, there is provided a cover body for an airbag apparatus according to the first or second aspect, wherein the cover body includes a retaining member that is locked to a leg portion to prevent the retaining member from coming off. It is a thing.

According to a fourth aspect of the present invention, there is provided a cover body for an airbag apparatus according to any one of the first to third aspects, wherein the legs are integrally formed with the decorative body.

According to a fifth aspect of the present invention, there is provided a cover body for an airbag apparatus according to any one of the first to fourth aspects, wherein the tip end portions of the legs are formed from a surface formed by a back surface portion of the covering portion. It does not project to the airbag side.

[0017]

In the cover body of the airbag apparatus according to the first aspect of the present invention, by attaching a decorative body which is a member different from the cover portion to the surface side of the cover portion of the cover body which covers the airbag,
The decorative effect is enhanced as compared with the configuration in which the decorative portion is formed integrally with the covering portion. Then, the ornamental body has a leg portion projecting from the ornamental body that penetrates through the covering portion, and a locking member is coupled to the leg portion on the back surface side of the covering portion, whereby The covering part is sandwiched between them, and the decorative component is easily attached. Also, there is no need to perform insert molding,
The decorative body does not get dirty in the molding process.

In the cover body of the airbag device according to a second aspect of the invention, in addition to the function of the first aspect, the locking member has a plate shape and is in planar contact with the back side of the covering portion. The covering portion is reliably sandwiched between the locking member and the locking member.

In the cover body of the airbag device according to a third aspect of the present invention, in addition to the function of the first or second aspect, the retaining member is retained by locking the retaining member to the leg portion, and the decorative component is provided. Are attached to the cover.

In the cover body of the airbag device according to the fourth aspect, in addition to the operation according to any one of the first to third aspects, since the leg portion is integrally formed with the decorative body, the leg portion which is a separate member is used. The manufacturing process is simplified as compared with.

In the cover body of the air bag device according to a fifth aspect of the present invention, in addition to the operation according to any one of the first to fourth aspects, the tip end portion of the leg portion is closer to the air bag side than the surface formed by the back surface portion of the covering portion. Since it does not project, the decorative parts do not interfere with the airbag.

[0022]

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

In FIG. 2, reference numeral 1 denotes a steering wheel of an automobile. The steering wheel 1 comprises a steering wheel main body 2 and an airbag device 3 mounted on an upper side of the steering wheel main body 2 which is an occupant side. Has been done.

The steering wheel body 2 is
An annular rim portion (ring portion) 5 which is a grip steering portion, a boss portion 6 located inside the rim portion 5, and these rim portions 5
And four spokes 7 connecting the bosses 6. A boss fitted to a steering shaft (not shown) is arranged below the steering wheel body 2 on the vehicle body side, and a boss plate is fixed to the boss by welding or the like. Also,
The core of the spoke 7 is connected to this boss plate,
The core metal of the rim portion 5 is connected to the core metal of the spoke portion 7. A skin portion 8 made of a soft synthetic resin or the like is formed on an outer peripheral portion of the core metal of the rim portion 5 and an outer peripheral portion of the spoke portion 7 on the rim portion 5 side of the core metal.

As shown in FIGS. 1 to 4, the airbag device 3 is provided with a metal base plate 11, which is attached to the boss plate of the steering wheel body 2 via a bracket or the like. There is. The base plate 11 is formed with an upper plate portion 11a having a substantially rectangular shape in plan view and a peripheral wall portion 11b bent downward from a peripheral edge portion of the upper plate portion 11a. Then, a circular hole-shaped inflator mounting hole 11c is formed in the upper plate portion 11a, and a substantially cylindrical inflator 12 which is fitted into the inflator mounting hole 11c from below and injects gas is mounted. . Further, an airbag 14 is attached to the upper surface of the upper plate portion 11a in a small folded state so as to cover the upper side of the inflator 12.

The airbag 14 has a ring-shaped lower cloth material having an opening 14a through which the upper portion of the inflator 12 is inserted, and a circular cloth material having the same outer diameter as the lower cloth material. The outer edges of the upper cloth material are sewn together to form a bag. Also, as shown in FIG. 1, the opening 14a
The peripheral edge portion of is reinforced by overlapping and stitching cloth materials, and a plurality of attachment through holes 14b are formed around the opening portion 14a.

An annular retainer 16 for pressing the opening 14a of the airbag 14 is inserted inside the airbag 14. Then, the plurality of bolts 17 attached to the retainer 16 are respectively attached to the attachment through holes 14b of the airbag 14.
And a mounting through hole 11d formed around the inflator mounting hole 11c in the upper plate portion 11a of the base plate 11, and the inflator.
The airbag 14 is integrated with the base plate 11 together with the inflator 12 by inserting the nut 18 into the mounting through hole 12b formed in the flange portion 12a protruding from the outer peripheral portion of 12 and screwing the nut 18 from the lower surface of the flange portion 12a. It is fastened and fixed.

Further, peripheral wall portions on both sides of the base plate 11
Each of the 11b has a bracket portion 11e attached to the boss plate.

Then, as shown in FIGS. 1 to 4, the cover body 21 of the airbag apparatus 3 is attached to the base plate 11 so as to cover the folded airbag 14. The cover body 21 is integrally formed by an injection molding method using a synthetic resin such as a thermoplastic elastomer, and 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. , This cover 22
Mounting wall part 23 formed in a substantially rectangular tube shape protruding downward from the back surface of the
And

The cover body 21 has a mounting wall portion 23.
Is fitted to the outside of the peripheral wall portion 11b of the base plate 11, the rivet 26 is inserted into the through holes 23a and 11f formed in the mounting wall portion 23 and the peripheral wall portion 11b, respectively, and the mounting wall portion 11b is caulked. The portion 23 is the peripheral wall portion 11b of the base plate 11.
It is stuck to.

Further, as shown in FIGS. 1 to 5, a decorative part mounting portion is provided at a substantially central portion of the covering portion 22 of the cover body 21.
28 is integrally formed, and the decorative component 31 is attached to the decorative component mounting portion 28. The decorative component mounting portion 28 is formed with an annular recess 28a in which the surface side of the covering portion 22 is recessed in an annular shape, and the annular recess 28a is formed.
A plurality of through-holes 28b communicating with the rear side from the rear side are formed at predetermined intervals.

The decorative component 31 includes an annular plate-shaped decorative body 33, a plate 34 as a locking member having substantially the same shape as the decorative body 33, and a plurality of shafts 35 forming leg portions.
And a plurality of retaining rings 36 as retaining members.

The decorative body 33 is an annular member made of an aluminum alloy whose surface is hairlined, and is fitted in the annular recess 28a of the decorative component mounting portion 28. Further, the decorative body 33 is formed with through holes 33a corresponding to the respective through holes 28b of the decorative component mounting portion 28. As shown in FIG. 5, the through holes 33a are formed by connecting a front surface side hole portion 33b opening to the front surface side and a back surface side hole portion 33c opening to the back surface side, respectively. Is substantially constant along the axial direction, the diameter of the rear surface side hole 33c is tapered toward the rear surface, and the diameter of the portion opened to the rear surface is the decorative component mounting portion 28. Through holes
It is formed to have almost the same diameter as 28b.

Further, each shaft 35 has a tapered head portion 35a formed at the base end portion thereof, and a straight portion 35b protruding from the head portion 35a.
An annular groove 35c is formed on the outer peripheral portion of the straight portion 35b near the tip thereof. When the shafts 35 are inserted into the through holes 33a of the ornamental body 33 from the front side, the head portion 35a is locked to the rear surface side hole portion 33c of the through hole 33a, and in this state, the surface portion of the head portion 35a. However, the surface of the decorative body 33 is flush with the surface of the decorative body 33, or the surface of the decorative body 33 is recessed toward the back surface side. Further, in this state, the straight portion 35b is inserted through the through hole 33a of the decorative body 33 and the through hole 28b of the decorative component mounting portion 28, and the cover body 35b is inserted.
It is exposed on the back side of 21.

On the other hand, the plate 34 is made of, for example, a thermoplastic resin, as shown in FIG. 1, and in this embodiment, it is formed by cutting out a sheet-shaped polycarbonate resin into an annular shape, and at the same time, decorating it. Through hole of component mounting part 28
A plurality of through holes 34a corresponding to 28b are formed.

Further, the retaining ring 36 is made of an elastically deformable member, and as shown in FIG.
It is formed as a so-called E-shaped retaining ring in which a locking piece 36b is projected from the three sides of both ends and the middle of a toward the center.

In order to attach the decorative component 31 to the covering portion 22 of the cover body 21, first, the through holes 33a of the decorative body 33 are attached.
, With each shaft 35 inserted from the front side,
These shafts 35 are aligned and inserted into the through holes 28b of the decorative component mounting portion 28, and the decorative body 33 is inserted into the annular recess 28.
insert into a. In addition, on the back surface side of the covering portion 22, the plate
34, and the tip of the shaft 35 is inserted into each of the through holes 34a of the plate 34. In this state, the decorative body
When 33 and the head portion 35a of the shaft 35 are pressed toward the back surface side and the plate 34 is pressed toward the front surface side, the covering portion 22 of the cover body 21 formed of an elastic elastomer is compressed and deformed, Each through hole 34 of the plate 34
The protruding size of the tip of the shaft 35 from a increases,
The groove portion 35c of each shaft 35 is also largely exposed on the back surface side of the plate 34. In this state, the retaining rings 36 are fitted and locked in the groove portions 35c of each shaft 35 from the radial direction. Here, when the pressing of the decorative body 33 and the plate 34 is released, the covering portion 22 near the decorative component mounting portion 28 is restored and deformed, and the plate 34 and the retaining ring 36 are elastically pressed to the back side, and the retaining ring The 36 is brought into contact with the wall portion on the tip side of the groove portion 35c. In this state, the snap ring 36 is attached to the shaft 35 by the elasticity of the main body 36a.
While being engaged with the groove portion 35c, the elasticity of the covering portion 22 presses the shaft 35 along the longitudinal direction of the shaft 35 to firmly fix it.

In this state, the retaining ring 36 prevents the plate 34 from coming off, and the covering portion 22 of the cover body 21 is sandwiched between the plate 34 and the decorative body 33. A decorative component 31 is attached to 22.

As shown in FIGS. 3 and 4, a tear line 38, which is weaker than other portions of the covering portion 22, is provided on the back surface side of the covering portion 22 of the cover body 21. The tear line 38 is connected to the central break line 38a extending in both directions and the pair of side break lines 38 extending in the front-rear direction in the vicinity of both side parts of the covering portion 22.
It is formed in a plane substantially H shape from b and b. Further, the central rupture line 38a is formed so as to pass through the annular recess 28a of the covering portion 22 at a predetermined distance and bypass the annular recess 28a in the vicinity of the annular recess 28a in a gentle curved shape. The central break line 38a has a gentle curved shape to bypass the annular recessed portion 28a, and also has a straight line shape, a gentle curved shape, or a flat plane with an obtuse tip so as to bypass the decorative component 31. The groove can be formed in various shapes such as a V shape or a substantially U shape in a plane.

When a vehicle collides, a igniter of the inflator 12 is activated by a signal from a collision diagnosing unit (not shown), and the propellant charged is burned to form on the peripheral surface of the inflator 12. Further, nitrogen gas or the like is rapidly injected into the inside of the airbag 14 from the gas injection hole 12c, and the folded airbag 14 is rapidly expanded. Then, in the airbag 14, due to the inflation pressure, the tear line 38 is broken from the central portion of the central breaking line 38a, the covering portion 22 of the cover body 21 is split along the tear line 38, and the pair of front and rear door pieces is broken. Parts are formed. Further, when the airbag 14 is inflated, the decorative parts 31 are held in the front door piece, and these door pieces are deployed forward and backward to form a protruding port of the airbag 14, and through the protruding port. The airbag 14 is projected and inflated and deployed to the front side of the occupant.

According to this embodiment, the airbag 14
Compared with a configuration in which the decorative portion is formed integrally with the cover portion 22 by attaching a metal decorative body 33 that is a member different from the cover portion 22 to the front surface side of the resin cover portion 22 of the cover body that covers As a result, the decorative effect can be enhanced, and the decorativeness of the vehicle interior can be enhanced. In addition, since the shafts 35 are arranged at a predetermined interval along the circumferential direction of the decorative body 33, it is possible to give a fine mechanical impression to those who see the airbag device 3, and at the same time, soft and large swing. In addition, the steering wheel 1 provided with the airbag device 3, which tends to give a monotonous impression, has an effect of making it look neat.

Further, in the decorative body 33, the shaft 35 protruding from the decorative body 33 side is inserted into the through hole 28b of the covering portion 22,
Plate the tip side of this shaft 35 with the back side of the coating 22.
By fixing to the 34, the covering portion 22 can be sandwiched between the decorative body 33 and the plate 34, and the decorative component 31 can be reliably fixed.

Further, the plate 34 is a groove portion of the shaft 35.
The retaining ring 36 that is locked to the 35c prevents the shaft 35 from coming off and can be easily fixed, so that the manufacturing process can be simplified, workability can be improved, and the decorative part 31 can be covered.
Can be securely attached to 22.

Further, the decorative body 33 and the plate 34 are in the form of a plate having the same shape that abuts the covering portion 22 in a planar manner, and the covering portion 22 is elastically sandwiched between the decorative body 33 and the plate 34. Therefore, the decorative component 31 can be reliably attached to the covering portion 22.

Then, in this way, the decorative part 31 is covered with the covering part.
Since it can be securely attached to the 22, the airbag device 3 operates, and even when the cover portion 22 is torn and the door piece is deployed at high speed, the decorative component 31 can be securely held on the front door piece, The airbag 14 can be smoothly inflated and deployed.

Furthermore, a simple work is performed on the decorative component 31 for the non-defective process of the covering portion 22 of the cover main body 21 which is injection-molded and is finished by removing gate marks and the like if necessary, and is completed through the processes such as coating. Since it is possible to attach the decorative component 31 to the covering portion 22, it is not necessary to perform insert molding or the like. Therefore, in the molding process, burrs are not generated or soiled at the boundary with the decorative body 33, so that the manufacturing process can be simplified, workability can be improved, appearance can be improved, and process yield can be improved. Can be good.

Since the decorative part 31 is attached by sandwiching the covering portion 22 from the front surface side and the back surface side, the covering portion 22 is attached.
It can be securely fixed regardless of the shape of 22, and it can improve versatility.

In the above embodiment, the ornamental body 33 of the ornamental part 31 is formed in an annular shape from an aluminum alloy having a hairline surface, but other materials or other shapes may be adopted. . For example, the shape may be a disk, an ellipsoid, a triangle formed of smooth corners, a quadrangle, a rhombus, a pentagon, a polygonal shape having a hexagon or more, or an irregular shape such as a cloud shape. The material is aluminum alloy, titanium alloy, metal plate such as stainless steel, polycarbonate, various nylon resins, ABS
Resins, various elastomer resins, various elastomer-modified resins, resins such as unsaturated polyester, sliced wood pieces backed with aluminum alloy, above-mentioned various resins adhered to film, or above-mentioned various resins, wood grain Printed pattern such as pattern, marble pattern, carbon composite pattern, and also glued foil such as gold leaf,
Further, a metalized product or the like can be used.

Also, the plate 34 can be formed from various materials as in the case of the above-mentioned decorative body 33, and the molding method is not only a method of cutting out a sheet-shaped material but also a method such as injection molding or compression molding. Can be formed.

Although an E-shaped retaining ring 36 is used as the retaining member, for example, as shown in FIG. 7, a so-called U-shaped retaining ring which is substantially U-shaped and engages with the shaft 35 from two directions. A ring 41, a so-called K-shaped retaining ring 42 that engages with the shaft 35 from two directions as shown in FIG. 8, and a plurality of engaging members that are elastically deformable from the annular portion 43a toward the inside as shown in FIG. A so-called push nut 43 with a projecting piece 43b, Fig. 1
As shown in 0, the insertion part 44 of the shaft 35 is inserted in the center of the disc.
a so-called flat push nut 44 in which a and an elastically deformable engaging piece 44b are formed, as shown in FIG. 11, a so-called round type in which a plurality of engaging pieces 45b project from the annular portion 45a toward the inside. Various types of speed nuts 45, and further, as shown in FIG. 12, various types such as a P-type speed nut 46 in which a locking piece 46 that engages with the shaft 35 from two directions is formed in a body portion 46a having a substantially rectangular plate shape are formed. A retaining member can be used. In addition, depending on these retaining members, the shaft
The groove 35c of 35 can also be formed in various shapes.

Further, in the above embodiment, the through hole of the decorative body 33
The shaft 35 inserted into the 33a is inserted into the through hole 34a of the plate 34, and the plate 34 is fixed using a retaining member such as a retaining ring 36. For example, as shown in FIG. By inserting the rivets 51 into the through holes 33a from the front side, and inserting the rivets 51 into the through holes 28b of the covering portion 22 and the through holes 34a of the plate 34, by caulking the tip portions 51a, The decorative component 31 can be fixed to the covering portion 22.

Since the rivet 51 is used in the embodiment shown in FIG. 13, a retaining member such as the retaining ring 36 is not required, the number of components can be reduced, and the decorative component
The 31 can be securely fixed to the covering portion 22.

Further, for example, as shown in FIG. 14, the leg portion 53 is integrally formed on the decorative body 33, and a retaining member such as a retaining ring 36 is locked to the leg portion 53 to fix the plate 34. You can also

By forming the leg portion 53 integrally with the decorative body 33 as in the embodiment shown in FIG. 14, the number of parts can be reduced as compared with the structure using the leg portion of another member. The manufacturing process can be simplified, the workability of mounting can be improved, and the manufacturing cost can be reduced.

Further, for example, as shown in FIG. 15, a caulking locking portion 55 as a leg piece is integrally formed on the decorative body 33, and the tip of the caulking locking portion 55 is caulked to plate 34.
Can also be fixed.

Further, as in the embodiment shown in FIG. 15, by integrally forming the caulking engaging portion 55 on the decorative body 33, compared to the structure using the leg portion and the retaining member which are separate members, The number of points can be reduced, the manufacturing process can be simplified, the workability of mounting can be improved, and the manufacturing cost can be reduced.

Further, in the embodiment shown in FIG.
When the caulking locking part 55 is made of thermoplastic resin,
This caulking locking part can be attached by various heating methods such as heating method using ultrasonic vibration or heating plate.
55 can be crimped. Further, in the embodiment shown in FIG. 14 and FIG. 15 described above, the leg portion is formed integrally with the ornament, but in the manufacturing process of this ornament, for example, the ornament and the leg are formed separately. After that, these may be integrally fixed.

Further, for example, as shown in FIG. 16, the vicinity of each through hole 28b of the decorative component mounting portion 28 on the back surface side of the covering portion 22 of the cover main body 21 is integrally or separately formed into a smooth ring or the like. It is also possible to slightly bulge to form a protrusion 61 that constitutes the back surface, and to make the surface 61a formed by this protrusion 61 and the tip 35d of the straight portion 35b of each shaft 35 substantially flush. it can. Then, in this way, the protrusion 61 of the cover body 21
The surface 61a formed by the and the tip 35d of each shaft 35 are substantially flush with each other, and the tip 35d of each shaft 35 is prevented from protruding from the back surface side of the cover main body 21 and each shaft 35. Folded airbag 14
It can be smoothly inflated and deployed while protecting the airbag 14 by smoothly abutting it on or in sliding contact with the inflating and deploying airbag 14.

In the embodiment shown in FIG. 16, the back surface 61a of the cover main body 21 and the tip end portion 35 of each shaft 35.
Although d and F are substantially flush with each other, for example, as shown in FIG.
It can also be stored on the front side of the surface 62a of 62, that is, inside the cover body 21. And thus each shaft
By positioning the tip portion 35d of 35 inside the surface 62a of the cover body 21, the airbag 14 is made to cover the resin cover body 21.
Can be brought into contact with and slidably contacted only.

Further, the decorative component mounting portion 28 of the cover body 21.
The projections 61 and 62 are not formed on the back surface side of the shaft, and the back surface of the covering portion 22 of the cover body 21 is formed into a flat surface or a predetermined curved surface, and a recess is formed in the vicinity of each through hole 28b. The tip 35d of 35 is flush with the back surface of the cover body 21, or is housed inside the cover body 21, and the shaft
It is possible to prevent the air bag 35 from abutting or sliding on the air bag 14.

In each of the above embodiments, the airbag device 3 mounted on the steering wheel main body 2 has been described, but the shape and mounting position of the airbag device are not limited to those described above. Applicable to passenger-side passenger airbag devices built into the panel, rear-seat airbag devices built into the front seat back, or airbag devices installed at the door or side of the seat for side collisions. be able to.

[0062]

According to the cover body of the airbag apparatus of the first aspect, the cover body is covered by attaching a decorative body, which is a member different from the cover portion, to the surface side of the cover portion of the cover body that covers the airbag. The decorative effect can be enhanced as compared with the configuration in which the decorative portion is integrally formed on the portion. Then, the ornamental body has a leg portion projecting from the ornamental body that penetrates through the covering portion, and a locking member is coupled to the leg portion on the back surface side of the covering portion, whereby The decorative part can be easily fixed by sandwiching the covering part therebetween. Further, since it is not necessary to perform insert molding and the decorative body is not contaminated in the molding process, the appearance can be improved and the manufacturing process can be simplified.

According to the cover body of the airbag device of the second aspect, in addition to the effect of the first aspect, the locking member has a plate-like shape that comes into planar contact with the back surface side of the covering portion, so that the decoration is provided. It is possible to reliably sandwich the covering portion between the body and the locking member, and to reliably attach the decorative component to the covering portion.

According to the cover body of the airbag device of the third aspect, in addition to the effect of the first or second aspect, since the cover body is provided with the retaining member for retaining the retaining member by retaining the retaining member on the leg portion. The manufacturing process can be simplified and the decorative component can be reliably attached to the covering portion.

According to the cover body of the airbag device of claim 4, in addition to the effect of any one of claims 1 to 3, since the leg portion is integrally formed with the decorative body, the leg portion of another member is used. Compared with the configuration, the manufacturing process can be simplified and the manufacturing cost can be reduced.

In the cover body of the airbag device according to claim 5, in addition to the effect according to any one of claims 1 to 4, the tip end portion of the leg portion is closer to the airbag than the surface formed by the back surface portion of the covering portion. Since it does not project, the decorative component does not interfere with the stored airbag or the airbag that expands and deploys, and the airbag device can be operated easily and smoothly.

[Brief description of the drawings]

FIG. 1 is an 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 perspective view of the above airbag device.

FIG. 4 is a sectional view taken along the line I-I of FIG. 3 of the airbag device.

FIG. 5 is an enlarged sectional view of a part of the same cover body.

FIG. 6 is a plan view of the same retaining member.

FIG. 7 is a plan view showing another embodiment of the retaining member of the present invention.

FIG. 8 is a plan view showing another embodiment of the retaining member of the present invention.

FIG. 9 is a plan view showing another embodiment of the retaining member of the present invention.

FIG. 10 is a plan view showing another embodiment of the retaining member of the present invention.

FIG. 11 is a plan view showing another embodiment of the retaining member of the present invention.

FIG. 12 is a plan view showing another embodiment of the retaining member of the present invention.

FIG. 13 is an exploded perspective view showing another embodiment of the decorative component of the present invention.

FIG. 14 is an exploded perspective view showing another embodiment of the decorative component of the present invention.

FIG. 15 is an exploded perspective view showing another embodiment of the decorative component of the present invention.

FIG. 16 is an exploded perspective view showing another embodiment of the decorative component of the present invention.

FIG. 17 is an exploded perspective view showing another embodiment of the decorative component of the present invention.

[Explanation of symbols]

 3 Airbag device 14 Airbag 22 Covering part 33 Decorative body 34 Plate as locking member 35 Shaft forming leg part 36 Retaining ring as retaining member 61 Protruding part 61a forming back surface part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroe Inoue 218 Aoshima-cho, Fuji-shi, Shizuoka Japan Plast Co., Ltd.

Claims (5)

[Claims] 1. A covering part for covering an airbag, and a decorative part attached to the covering part, the decorative part comprising a decorative body arranged on a surface side of the covering part, and a decorative body from the decorative body. A cover body for an airbag device, comprising: a leg portion protruding from the covering portion; and a locking member arranged on a back surface side of the covering portion and coupled to the leg portion. 2. The cover body for an airbag device according to claim 1, wherein the locking member has a plate-like shape that comes into planar contact with the back surface side of the covering portion. 3. The cover body for an airbag device according to claim 1, further comprising a retaining member for retaining the retaining member by retaining the retaining member on the leg portion. 4. The cover body for an airbag device according to claim 1, wherein the leg portion is integrally formed with the decorative body. 5. The cover body for an airbag device according to claim 1, wherein the tip end portion of the leg portion does not protrude toward the airbag side from the surface formed by the back surface portion of the covering portion.