JP2000025547A - Ornament fitting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fitting structure of an ornament capable of easily fitting the ornament on a door part, and reducing the manufacturing man-hour and the manufacturing cost of a cover. SOLUTION: An ornament 20 is fitted to a door part 14 of a cover to be opened when a folded airbag is inflated. The ornament 20 is provided with a decoration part 21, a fitting plate part 23 which is provided on a back side of the decoration part with a gap 24 therefrom, and a connection part 22 to connect the decoration part to the fitting part. The fitting plate part 23 is provided with a fitting hole 23a. The door part 14 is provided with a recessed storage part 15 capable of storing the ornament is provided on its face side, and a fitting hole 16a is formed in a bottom part 16 of the recessed storage part. The ornament 20 is stored in the recessed storage part 14, and fitted to the door part 14 by inserting a blind rivet 27 into the fitting holes 16a, 23a of the bottom part of the recessed storage part and the fitting plate part from a back side of the door part, and connecting the bottom part 16 of the recessed storage part to the fitting plate part 23 by tightening the blind rivet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ornament mounting structure which is mounted on a cover for covering an airbag of an airbag device which is folded and housed, and particularly to a door portion of the cover which opens when the airbag is inflated. The present invention relates to an ornament mounting structure that is mounted on an ornament.
The airbag device 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 attachment structure in which an ornament is attached to a door portion of a cover that opens when an airbag is inflated, one described in Japanese Patent Application Laid-Open No. 9-175304 is known.

[0003] The ornament described in the above publication is provided with one attachment leg as a fixing means extending bifurcated from the back side of the decorative portion, and the attachment to the door portion is performed by attaching the attachment leg to the door portion. Into the mounting hole provided in the door, from the front side of the door, and bend the forked legs of the mounting leg on the back side of the door so that they are separated from each other. The ornament was attached to the door so that the periphery of the hole was sandwiched between the decorative part and the leg.

However, in a conventional ornament mounting structure, it is necessary to insert one mounting leg into a predetermined mounting hole and then bend the pair of legs of the mounting leg away from each other. Furthermore, since it is necessary to securely bend the legs about 90 ° to the vicinity of the periphery of the mounting hole on the back side of the door so as not to interfere with the airbag, it takes time to mount the ornament. Was.

When an ornament is attached to a door portion of a cover which is opened when the airbag is inflated by using a plurality of fixing means, the fixing means is arranged at a plurality of positions on the periphery of the ornament, and the door portion is provided with a plurality of fixing means. The ornament was attached by putting this plate on the back side.

However, in the conventional mounting structure, the fixing means are evenly arranged on the entire periphery of the ornament, and the ornament is mounted on the door portion, so that the number of fixing means is increased, and there is room for improvement in the mounting work. was there.

The present invention has been made to solve the above-mentioned problem, and even when one or a plurality of fixing means is used, the ornament can be easily attached to the door, and the number of man-hours and manufacturing cost of the cover can be reduced. An object of the present invention is to provide an ornament mounting structure that can be reduced.

[0008]

A first mounting structure according to the present invention uses one fixing means for a door portion of a cover which covers a folded airbag and opens when the airbag is inflated. An ornament mounting structure for mounting the ornament, wherein the ornament has a decorative portion and a mounting plate portion facing the decorative portion with a gap between the decorative portion and a back surface of the decorative portion. And a connecting portion for connecting the decorative portion and the mounting plate portion, and one mounting hole is provided in the mounting plate portion, and the ornament is provided on a surface side of the door portion. A storage recess that can be stored is formed, a mounting hole corresponding to the mounting hole of the mounting plate portion is formed at the bottom of the storage recess, and the ornament is stored in the storage recess. From the side, the storage recess A blind rivet as a fixing means is inserted into a mounting hole at a bottom portion of the mounting plate portion and a mounting hole at the mounting plate portion, and the bottom portion of the storage recess is connected to the mounting plate portion by fastening the blind rivet, whereby the ornament is attached. It is characterized in that it is attached to the door.

In a second mounting structure according to the present invention, a plurality of fixing means are provided on a door portion of a cover which covers a folded airbag and breaks a portion to be broken when the airbag is inflated and opens. Utilizing, when mounting the ornament, while attaching the fixing means at a plurality of locations on the periphery of the ornament, and applying a plate to the back side of the door portion, the ornament mounting structure for mounting the ornament, The abutment plate corresponds to the outer peripheral edge of the ornament, and is formed in a substantially annular shape in which a cutout portion is arranged at a portion on the side of the planned breakage portion, and the fixing means is provided at a position of the cutout portion. The ornament is attached to the door part by arranging the ornament in a symmetrical shape around the fixing area.

[0010]

According to the first mounting structure of the present invention,
At the time of mounting the ornament, the ornament is stored in the storage recess of the door portion, and one blind rivet as a fixing means is inserted from the rear side of the door into the mounting hole at the bottom of the storage recess and the mounting hole of the mounting plate portion, When the blind rivet is fastened, the bottom of the storage recess is connected to the mounting plate, and the ornament can be mounted on the door.

The blind rivet is capable of connecting and fixing predetermined members to each other by operating only one side of the original part in the insertion direction. When inserted into the mounting hole at the bottom of the storage recess and the mounting hole of the mounting plate, and withdrawing a predetermined withdrawal rod, the distal end swells, and the space between the flange at the base and the swelling at the distal end is increased. Thus, the bottom of the storage recess and the mounting plate are sandwiched, and both are connected.

Therefore, in the first mounting structure according to the present invention, one blind rivet is inserted into a predetermined mounting hole after the ornament is placed in the storage recess, and thereafter, the blind rivet is simply pulled out. Since the mounting operation can be completed only by pulling out the cover, the ornament can be easily mounted on the door portion, and the man-hour and manufacturing cost of the cover can be reduced.

In the second mounting structure according to the present invention, when mounting the ornament, the ornament is arranged on the front surface side of the door portion, and the abutment plate is arranged on the back surface side of the door portion to use a plurality of fixing means. Then, the ornament can be attached to the door.

The fixing means are not uniformly arranged on the periphery of the ornament, but are arranged symmetrically with respect to a non-fixing area arranged at the cutout portion of the plate. That is, since the fixing means is not arranged in the non-fixed area, the number of fixing means can be reduced by the number of fixing means conventionally arranged in the non-fixed area, and the number of steps of the mounting operation can be reduced. .

Therefore, in the second mounting structure according to the present invention as well, the number of fixing means conventionally disposed in the non-fixing area can be reduced, so that the ornament can be easily mounted on the door. And man-hours for manufacturing the cover
Manufacturing costs can be reduced.

Furthermore, it is not the mode in which only one of the plurality of fixing means is arranged on the side of the rupturable portion provided on the cover for opening the door. That is, if only one of the plurality of fixing means is disposed on the side of the rupture scheduled portion provided on the cover for opening the door portion, the first
Stress concentration is likely to occur at the portion of the door portion through which the two fixing means penetrate.

However, in the second mounting structure according to the present invention, the fixing means is symmetrical with respect to the non-fixed area of the ornament arranged at the notch provided on the side of the plate to be broken. Are arranged symmetrically, and are arranged symmetrically with respect to the non-fixed area, and are arranged at an equal distance from the expected break portion. When the airbag is inflated, stress concentration is less likely to occur at one location, and stress is dispersed at a portion of the door portion that has penetrated the two fixing means, so that the portion to be broken can be accurately broken.

Further, since the contact plate is formed in a substantially annular shape having a cutout on the side of the portion to be broken, the cutout portion allows a portion of the door on the side of the ornament to be broken to be positioned between the ornament and the plate. Since the structure is not pinched and does not have a rigid body structure, the breakable portion can be accurately broken when the breakable portion breaks. By the way, if the part of the door sandwiched between the ornament and this plate is placed near the part to be broken, the part is rigid, so stress concentration occurs on the periphery of the rigid part As a result, the periphery of the rigid body part is broken, and there is a possibility that the part other than the part to be broken is broken.

[0019]

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

The cover 10 to which the ornament 20 of the first embodiment is attached is used for the airbag device 1 disposed above the boss B at the center of the steering wheel W1 as shown in FIG. Bag device 1
Is configured to include 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 that holds the airbag 2, the inflator 4, and the cover 10. ing.

The airbag 2 has a bag-like shape having 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 an outer peripheral surface of the main body 4a.

The bag holder 5 is composed of an upper plate 6 and a lower plate 7. Each of the plates 6, 7 has a bottom wall having a centrally disposed insertion hole 6b, 7b into which the inflator body 4a can be inserted. 6a, 7a and side walls 6c, 7 extending upward from the periphery of the bottom wall 6a, 7a
c. At the upper end of the side wall 6c of the upper plate 6, a side wall 17 described later of the cover 10 is provided.
A locking hook 6d is formed to be inserted and locked in a locking groove 17a formed in the inner peripheral surface of the lock. The upper end of the side wall 7c of the lower plate 7 is connected to a side wall 17 of the cover 10 which will be described later.
Is inserted into the insertion groove 17b formed on the lower end face of the.

The attachment of the airbag 2, the inflator 4, and the cover 10 to the bag holder 5 will be described.
First, an annular retainer 3 arranged on the periphery of the opening 2a in the airbag 2 is provided with a plurality of bolts 3 projecting downward.
a. Then, these bolts 3a are inserted into the airbag 2 so as to protrude from the peripheral edge of the airbag opening 2a, and the airbag 2 is folded. Next, the folded airbag 2 is disposed on the upper plate bottom wall 6a while the bolts 3a of the retainer 3 are inserted through the peripheries of the insertion holes 6b of the upper plate bottom wall 6a.
The cover 10 is put on the folded airbag 2, and the locking hook 6 d of the upper plate side wall 6 c is inserted and locked into the locking groove 17 a of the side wall 17. Thereafter, the inflator body 4a is inserted into the insertion hole 6b of the upper plate 6 from below, and each bolt 3a is inserted into the inflator flange 4c. Next, the lower plate 7 is disposed below the upper plate 6 so that the bolts 3a penetrate the periphery of the insertion hole 7b of the lower plate bottom wall 7a, and the upper end of the lower plate side wall 7c is If the nut 8 is screwed into each of the bolts 3a and inserted into the insertion groove 17b, the airbag 2, the inflator 4, and the cover 10 are held in such a manner that the cover side wall 17 is sandwiched between the upper and lower plate side walls 6c and 7c. Will be attached to the bag holder 5.

The cover 10 is made of a thermoplastic elastomer such as an olefin or styrene resin, and covers the upper part of the folded airbag 2, and projects substantially downward from the lower surface of the ceiling wall 11. Square tube side wall 1
7 are provided.

In the side wall portion 17, on the inner peripheral surface side, the above-described locking groove 17 a which is locked by the locking hook portion 6 d of the upper plate 6.
Is formed on the lower end surface, and an insertion groove 17b into which the side wall 7c of the lower plate 7 is inserted is 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 when the doors 13 and 14 are opened are near the side wall 17 in the front-rear direction of the ceiling wall 11.

The door 1 located on the front side when the airbag device 1 is disposed on the steering wheel W1.
As shown in FIGS. 1 to 3, a storage recess 15 which is recessed in a substantially elliptical shape, into which the ornament 20 can be fitted, is formed at a position away from the breakable portion 12 on the fourth surface side. The bottom 16 of the storage recess 15 has a mounting hole 16a at the center.
Are formed.

The ornament 20 is formed by injection molding from a thermoplastic elastomer such as olefin or styrene, and as shown in FIGS.
And a gap 2 between the decorative portion 21 and the back side of the decorative portion 21.
4, a mounting plate portion 23 facing the decorative portion 21 with an opening 4, and a connecting portion 22 connecting the decorative portion 21 and the mounting plate portion 23 are provided. In the case of the embodiment, the ornament 20 is made of a styrene-based thermoplastic elastomer.

The decorative portion 21 is configured by arranging decorative characters, patterns, and the like on the upper surface side.
In the case of the embodiment, the smaller shape is a square plate shape. The mounting plate portion 23 has one mounting hole 23a at the center thereof. The gap 24 is provided to prevent the blind rivet 27 at the time of fastening from interfering with the back side of the decorative portion 21. The connecting portion 22 is provided with the gap 2
Four openings 25 are formed at two positions in the front-rear direction of the ornament 20 so as to be provided in the left-right direction.

Referring to the blind rivet 27 as a fixing means used in the mounting work of the ornament 20, as shown in FIG. 3, it is composed of a metal tubular member 28 and a pull-out rod 29 before fastening. I have. The cylindrical member 28 includes a flange 2 at the lower end of the cylindrical main body 28a.
8b, and the extraction rod 29 is
Of the cylindrical member main body 28a, the bulge 29a having a diameter larger than the inner diameter of the cylindrical member main body 28a.
It is provided with. The outer diameters of the cylindrical member main body 28a and the bulging portion 29a are as follows: the mounting hole 16a of the bottom 16 of the storage recess 15, the mounting hole 23a of the mounting plate 23, and the plate 3 made of sheet metal.
The outer diameter of the flange portion 28b of the cylindrical member 28 is set to be larger than the inner diameter of the mounting hole 16a of the storage recess bottom 16.

When the ornament 20 is mounted on the door 14, the corresponding plate 31 is arranged on the mounting plate 23 from the opening 25 so that the through hole 31a coincides with the mounting hole 23a. Storage recess 1 of door 14
5 from the back side of the door 14,
The mounting hole 16a, the mounting hole 23a of the mounting plate 23, and the through hole 31a of the contact plate 31
The cylindrical member main body 28a of the blind rivet 27 and the bulging portion 29a side of the extraction rod 29 are inserted until the peripheral edge of the blind rivet 27 is brought into contact.

Thereafter, the pulling rod 29 is pulled out. Then, the bulging portion 29a of the extraction rod 29 is moved to the cylindrical member main body 28.
a in such a manner as to compress the cylindrical member body portion 28a
A bulging portion 28c having an enlarged diameter is formed, and the housing concave bottom portion 16, the mounting plate portion 23, and the abutment plate 31 are sandwiched between the flange portion 28b and the bulging portion 28c of the cylindrical member 28, and the housing concave portion The bottom 16 and the mounting plate 23 are connected.

The pulling rod 29 to be pulled is attached to the cylindrical member main body 2.
It will be automatically broken in the vicinity protruding from 8a.

Then, in this way, the ornament 20
Is attached to the bag holder 5 together with the airbag 2 and the inflator 4 as described above to assemble the airbag device 1, and the airbag device 1 is attached to the upper plate sidewall 6 c of the bag holder 5. What is necessary is just to arrange | position to the steering wheel W1 by the provided attachment means (not shown).

When the gas is discharged from the gas discharge port 4b of the inflator 4 after the steering wheel W1 is mounted on the automobile, the gas to be broken 12 is pushed by the inflating airbag 2 so that the breakable portion 12 is broken and the doors 13 and 14 are broken. Is opened, and the airbag 2 protrudes from the cover ceiling wall 11 and expands greatly.

At that time, in the cover 10 of the first embodiment,
Ornament 20 is blind rivet 2 on door 14
7, it does not come off the door portion 14.

In the mounting structure according to the first embodiment, one blind rivet 27 is inserted into the predetermined mounting holes 16a and 23a after the ornament 20 is disposed in the storage recess 15.
Etc., and then simply blind rivet 2
Since the mounting operation can be completed only by pulling out the pull-out bar 29 of the seventh embodiment, the ornament 20 can be easily mounted on the door portion 14 and the number of manufacturing steps and manufacturing cost of the cover 10 can be reduced.

In the first embodiment, the ornament 2
0 is formed of a thermoplastic elastomer, and the bulging portion 29a of the metal blind rivet 27 is also arranged with a gap with the decorative portion 21, so that when the decorative portion 21 is pressed, a soft touch is obtained. Therefore, even if the ornament 20 interferes with another member when the airbag 2 is inflated, damage to that member can be prevented.

Further, in the first embodiment, the ornament 20 is attached to the door 14 by one blind rivet 27, and the number of the attachment holes 16a provided in the bottom 16 of the storage recess can be reduced to one. Compared to the case where a plurality of mounting holes 16a are provided and a plurality of rivets 27 are used, even when the storage recess bottom 16 is extended when the airbag 2 is inflated, the peripheral edge of the mounting hole 16a is less likely to be distorted. The strength of the peripheral edge of the mounting hole 16a can be improved.

In the first embodiment, the contact plate 3 made of sheet metal is used.
Although the ornament 1 is used, the ornament 20 may be attached to the door portion 14 without using the contact plate 31.

As the decorative portion 21, as in the embodiment, a predetermined design surface on which printing or relief is applied is formed on the upper surface side, and another member such as a potting layer is fixed on the upper surface side to fix the design portion. A surface may be formed.

The cover 40 to which the ornament 50 of the second embodiment is attached is used for the airbag device 31 arranged above the boss B at the center of the steering wheel W2 as shown in FIG. The airbag device 31 includes an airbag 2 that is folded and stored, and an inflator 4 that supplies gas for inflation to the airbag 2.
And an airbag 2, an inflator 4, and a bag holder 5 including upper and lower plates 6.7 for holding the cover 40. In the second embodiment, the cover 40 and the ornament 50 are different from those of the first embodiment. In addition, the bag holder 5 including the airbag 2, the retainer 3, the inflator 4, the upper, the lower plate 6 and the This is the same as the first embodiment, and the same reference numerals are given and the description thereof is omitted.

The cover 40 is made of a thermoplastic elastomer such as olefin or styrene, and covers the upper part of the folded airbag 2, and projects substantially downward from the lower surface of the ceiling wall 41. Square tube-shaped side wall 4
7 are provided.

A locking groove 47a is formed in the side wall portion 47 on the inner peripheral surface side so as to be locked by the locking hook portion 6d of the upper plate 6, and the side wall portion 7c of the lower plate 7 is inserted into the lower end surface. The insertion groove 47b to be formed is formed.

As shown in FIGS. 6 and 7, the ceiling wall portion 41 has a thin breakable portion 4 having a substantially H shape when viewed from above.
2 are formed, and when the airbag 2 is inflated,
2 is broken to open the two door portions 43 and 44 like a double door. The hinge portions 43a and 44a when the doors 43 and 44 are opened are near the side wall 47 in the front-rear direction of the ceiling wall 41.

The to-be-ruptured portion 42 of the cover 40
To be more specific, the breakable portion 42 of the second embodiment is
Vertical bar portions 42a and 42b extending in the front-rear direction of the vehicle at both left and right edges of the ceiling wall portion 41, and a horizontal bar portion interconnecting the left and right vertical bar portions 42a and 42b substantially at the center of the vertical bar portions 42a and 42b. 42c. Further, the horizontal bar portion 42
c is provided with a semi-circular annular curved portion 42d which bulges the center toward the rear side of the vehicle.

Further, the door 4 located on the front side when the airbag device 31 is disposed on the steering wheel W2.
As shown in FIGS. 6 to 8, the ornament 5 is provided on the front surface side of the fourth side so as to enter the curved portion 42 d of the scheduled break portion 42.
A storage recess 45 recessed in a circular shape into which 0 can be fitted is formed. The bottom wall 46 of the storage recess 45 has a peripheral edge 5.
At the location, a mounting hole 46a is formed penetrating the front and back. An annular concave groove 46b in which a contact plate 61 to be described later is arranged is formed in a peripheral portion of the storage concave portion 45 on the back surface side of the door portion 44.

The ornament 50 includes a circular substrate 51 formed of a metal such as aluminum or the like, and on its surface side, an annular decorative portion 52 arranged on the outer peripheral edge side;
Disc-shaped decorative part 5 made of a potting layer on the inner peripheral side
3 are fixed. Dummy 52a imitating the head of a hexagonal socket bolt is formed in decorative portion 52 at a total of six places, one place in the front-rear direction of the car and two places in the left-right direction of the car. .

On the back side of the ornament 50, FIG.
As shown in FIG. 7, a female screw 57a is provided on the inner peripheral side of each of the five locations of the dummy 52a except for the location of the dummy 52a on the rear side of the automobile, and the cylindrical mounting can be inserted into each of the mounting holes 46a. A boss 57 is projected. The portion where the mounting boss 57 is not formed is the non-fixed area 54. These five mounting bosses 57 constitute fixing means and are arranged symmetrically about the non-fixing area 54. The female screw 57a of the mounting boss 57 has a bolt 5
8 will be screwed together.

Each of the bolts 58 has a round head portion 58a so as not to interfere with the folded airbag 2.

The abutment plate 61 is formed as a substantially ring-shaped body corresponding to the outer peripheral edge of the ornament 50 and having a cutout portion 61b disposed at a portion on the curved portion 42d side of the breakable portion 42. When the notch 61b is arranged in the non-fixed area 54 of the ornament 50, the contact plate 61 is arranged corresponding to each mounting boss 57, and has five through holes through which the shaft 58b of the bolt 58 can be inserted. A hole 61a is provided.

The mounting operation of the ornament 50 according to the second embodiment will be described. First, the non-fixed area 54 is arranged at the center of the curved portion 42d of the portion 42 to be broken.
Each of the mounting bosses 57 is inserted through the mounting hole 46 a, and the ornament 50 is disposed in the storage recess 45 of the door 44. Next, each mounting boss 57 and each through-hole 61a are made to correspond to each other,
The contact plate 61 is arranged in the concave groove 46b on the back surface side of the door portion 44,
If the bolt 58 is screwed into the female screw 57a of each mounting boss 57 through each through hole 61a, the ornament 50
4 can be attached.

Then, in this way, the ornament 50
The airbag device 31 is assembled by attaching the cover 40 with the airbag 2 and the inflator 4 to the bag holder 5 as in the first embodiment, and the airbag device 31 is attached to the upper plate side wall of the bag holder 5. What is necessary is just to arrange | position to the steering wheel W2 by the attachment means (not shown) provided in 6c.

When the gas is discharged from the gas discharge port 4b of the inflator 4 after the steering wheel W2 is mounted on the automobile, the gas to be broken 42 is pushed by the inflating airbag 2 so that the breakable portion 42 is broken and the doors 43 and 44 are broken. Is opened, and the airbag 2 protrudes from the cover ceiling wall portion 41 and greatly inflates.

At this time, in the cover 40 of the second embodiment,
Each of the bolts 58 as fixing means is inserted into the abutment plate 61 and screwed into the mounting boss 57 of the ornament 50, so that the ornament 50 is attached to the door portion 44, so that it does not come off from the door portion 44.

The mounting boss 57 as a fixing means
The bolts 58 are not evenly arranged on the periphery of the ornament 50, but are arranged symmetrically around the non-fixed area 54 arranged at the cutout 61 b of the contact plate 61. That is, since the mounting boss 57 and the bolt 58 are not arranged in the non-fixed area 54, the number of steps of the mounting operation can be reduced. By the way, conventionally, ornament 50
A mounting boss 57 and a bolt 58 are provided on the back side of the position where the dummy 52a is arranged so as to be even on the outer peripheral edge of the dummy 52a, and the mounting boss 57 and the like are also provided at the center of the non-fixed area 54.

Therefore, also in the second embodiment, since the number of mounting bosses 57 and the like conventionally disposed in the non-fixed area 54 can be reduced, the ornament 50 can be easily mounted on the door portion 44. In addition, the number of manufacturing steps and manufacturing cost of the cover 40 can be reduced.

Further, a plurality of mounting bosses 57 and bolts 58
Is not disposed on the side of the curved portion 42d of the breakable portion 42 provided on the cover 40 to open the door portion 44. That is, as in the prior art, if only one set of the plurality of mounting bosses 57 and the like is disposed on the curved portion 42d side of the breakable portion 42, the airbag 2
During the expansion, stress concentration is likely to occur at the portion of the mounting hole 46a of the door portion 44 that penetrates the mounting boss 57 provided on the center side of the curved portion 42d.

However, in the mounting structure according to the second embodiment, the mounting boss 57 is symmetrically disposed around the non-fixed area 54 disposed in the cutout 61b, and the curved portion 42d in the breakable portion 42 is formed. The two mounting bosses 57L and 58R (see FIGS. 7 and 9) arranged on the side portion are arranged symmetrically with respect to the non-fixed area 54 so that the distance from the curved portion 42d of the breakable portion 42 is equal. When the airbag 2 is inflated, stress concentration is less likely to occur at one location, and stress is applied to the periphery of the mounting hole 46a of the door portion 44 penetrating the two mounting bosses 57L and 57R. It is dispersed, and the to-be-ruptured portion 42 can be broken accurately.

Further, since the abutment plate 61 is a substantially annular body having a notch 61b on the curved portion 42d side of the to-be-ruptured portion 42, the notched portion 61b allows the door portion 44 to have the ornament 50 on the curved portion 42d side of the ornament 50. The portion 44b is not sandwiched between the ornament 50 and the abutment plate 61 and does not have a rigid structure, so that when the breakable portion 42 breaks, the breakable portion 42 can be accurately broken. Incidentally, the curved portion 42d of the ornament 50 in the door portion 44
Side part 44b is sandwiched between the ornament 50 and the contact plate 61 having no notch 61b.
4b becomes a rigid body, stress concentration easily occurs on the periphery of the rigid body portion 44b, and the periphery of the rigid body portion 44b breaks, causing a possibility that the portion other than the portion to be broken 42 (42d) is broken. I will.

In the second embodiment, the mounting boss 57 and the bolt 58 formed on the ornament 50 itself are exemplified as the fixing means. The fixing means may be constituted by the bolt and the nut, or a rivet or the like may be used as the fixing means.

In the first and second embodiments, the attachment of the ornaments 20 and 50 to the covers 10 and 40 disposed on the steering wheels W1 and W2 has been described. The present invention can be used for a cover that covers an airbag of an airbag device.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the cover of the embodiment.

FIG. 3 is an enlarged cross-sectional view showing an attached state of the ornament of the embodiment, and corresponds to a III-III part in FIG. 2;

FIG. 4 is a bottom view of the cover near the ornament according to the embodiment.

FIG. 5 is a bottom view of the ornament according to the embodiment.

FIG. 6 is a cross-sectional view illustrating a use mode of a cover to which an ornament according to a second embodiment of the present invention is attached;
Corresponds to the VI-VI site.

FIG. 7 is a plan view of the cover of the embodiment.

FIG. 8 is an enlarged cross-sectional view showing a mounted state of the ornament of the embodiment.

FIG. 9 is a bottom view of the ornament according to the embodiment.

FIG. 10 is a bottom view of the plate of the embodiment.

[Explanation of symbols]

 2 ... airbag, 10/40 ... cover, 14/44 ... door, 15 ... storage recess, 16 ... bottom, 16a ... mounting hole, 20/50 ... ornament, 21 ... decorative part, 22 ... connecting part, 23 ... Mounting plate portion, 23a: mounting hole, 24: gap, 27: (fixing means) blind rivet, 54: non-fixing area, 56: fixing means, 57: mounting boss, 58: bolt, 61: contact plate, 61b: cutout Department.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor: Satoshi Oyama, Ogatachi, Kasuga-machi, Nishi-Kasugai-gun, Aichi Prefecture Inside Toyoda Gosei Co., Ltd. Inside Toyoda Gosei Co., Ltd. (72) Inventor Tadashi Yamada 1, Ochiai, Nagahata, Kasuga-machi, Nishi-Kasugai-gun, Aichi Prefecture Inside Toyoda Gosei Co., Ltd. Co., Ltd. (72) Inventor Yuichi Adachi 1 Ochiai, Nagahata, Kasuga-cho, Nishi-Kasugai-gun, Aichi Prefecture F-term (reference) 3B087 CD05 DE10 3D023 BA01 BB25 BC01 BD29 BE03 BE36 3D054 AA02 AA03 AA07 AA21 BB BB24 BB30 FF17

Claims (2)

[Claims] 1. An ornament mounting structure for mounting an ornament on a door portion of a cover which covers a folded airbag and opens when the airbag is inflated, using one fixing means, wherein the ornament is provided. But the decorative part, on the back side of the decorative part,
A mounting plate portion facing the decoration portion with a gap between the decoration portion and a connection portion connecting the decoration portion and the mounting plate portion; A storage recess capable of storing the ornament is formed on the front side of the door portion, and a mounting hole corresponding to the mounting hole of the mounting plate portion is formed at the bottom of the storage recess. In the state where the ornament is stored in the storage recess,
A blind rivet as a fixing means is inserted from the back side of the door into the mounting hole at the bottom of the storage recess and the mounting hole of the mounting plate portion, and the bottom of the storage recess is connected to the mounting plate by fastening the blind rivet. An ornament attachment structure, wherein the ornament is attached to the door by connecting the ornament to the door. 2. The method according to claim 1, wherein a plurality of fixing means are used to attach the ornament to the door portion of the cover which is opened by breaking the portion to be broken when the airbag is inflated and covers the folded airbag. Along with disposing the fixing means at a plurality of locations on the periphery of the ornament,
An attachment mounting structure for mounting the ornament, wherein the abutment plate corresponds to an outer peripheral edge of the ornament, and is formed in a substantially annular shape in which a cutout portion is disposed at a portion on the side of the breakable portion, and the fixing means Wherein the ornament is attached to the door portion by symmetrically arranging the ornament around the non-fixed area arranged at the cutout portion.