JP3129653B2 - Airbag cover - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag cover of an airbag device installed in, for example, an instrument panel of a motor vehicle, and more particularly, to a mounting structure which can be easily and accurately mounted on the instrument panel. The present invention relates to an airbag cover provided.

[0002]

2. Description of the Related Art In an airbag device, when a vehicle is subjected to a severe impact, a high-pressure gas is generated from an internal inflator.
The airbag is inflated to support and protect the occupant. Therefore, the installation site of the airbag device includes a center portion of a steering wheel in front of a driver's seat, an instrument panel in front of a passenger seat, a front seat in front of a rear seat, or a door panel. For example, when the airbag device is installed on the instrument panel in front of the passenger seat, an opening for installing the airbag device is formed at a predetermined position on the upper surface of the instrument panel, and the airbag is provided in the opening. The airbag module that houses the bag and the inflator is housed and fixed, and the airbag cover of the airbag module that expands when the airbag inflates is attached to the periphery of the opening, and the opening of the instrument panel is closed. I do.

An airbag cover of an airbag device installed on the passenger side is disclosed in Japanese Patent Application Laid-Open No. 7-267033. The airbag cover disclosed in this publication is provided with a thin tear line for breaking and deploying the airbag in a predetermined shape when the airbag is inflated, and is provided on the back surface of the airbag cover so as to project in parallel with each other. It has a pair of front and rear (window side and occupant side) leg pieces, and the front and rear leg pieces are fixed to the front and rear of the retainer of the airbag module by bolts or rivets.

[0004] A side wall portion is integrally formed along the front end of the airbag cover from the rear surface thereof, and the side wall portion is engaged with a front engaging edge of the opening at a predetermined interval. A part is formed. On the other hand, a mounting piece having an L-shaped cross section is extended from a protruding end of the rear leg piece, and a clip mounting hole is formed at a predetermined interval in the mounting piece. A clip formed by bending the material is separately attached. The protruding end of the rear leg piece is formed to be thin to prevent sink marks occurring on the surface of the airbag cover. Further, the portion between the side wall portion and the front leg portion and the portion between the mounting piece and the rear leg portion are connected and reinforced by ribs integrally protruded from the back surface of the airbag cover.

The airbag cover is fitted into the opening edge of the instrument panel such that the upper release surface of the retainer faces the opening of the instrument panel, and the locking claw is engaged with the front side of the instrument panel. The airbag cover is fixed to the instrument panel by engaging the engaging portion of the clip with the rear engaging edge of the instrument panel while engaging with the edge.

[0006]

The engagement of the airbag cover to the instrument panel according to the prior art described above is attachment by a clip made of a leaf spring material. After the airbag cover is formed, the clip is attached to the instrument panel. Since a step of separately attaching the cover to the clip mounting hole is required, the production capacity is low.In addition, when the clip is attached to the instrument panel, the clip is simply attached to the clip mounting hole and drops off. It is easy and the efficiency of the engagement work and the time-consuming work is low.

Further, when the airbag is inflated, the airbag cover is deployed with a strong momentum. When the airbag cover is deployed, the upward force is applied to the rear leg piece, which is a fixing portion to the retainer, and to the instrument panel. To both the mounting piece, which is an engaging portion to the mounting member. Therefore, despite the fact that sufficient strength is required at the protruding end portion of the rear leg piece portion where the mounting piece is extended, the above-described airbag cover prevents sinkage of the cover surface which occurs at the time of molding. For this reason, the protruding end is formed to be thin, so that sufficient strength cannot be obtained.

Further, the side wall portion on which the locking claw portion is formed and the mounting piece to which the clip is mounted are reinforced with ribs as described above, but the rib is made of the same soft material as the airbag cover. When the airbag cover is fitted into the instrument panel for engagement, the ribs may be deformed and the side walls and the attachment pieces may fall outward, respectively, so that the airbag cover is smoothly engaged. There are things you can't do. On the other hand, it is also possible to increase the thickness of the ribs or increase the protrusion length of the ribs to increase the strength of the ribs.
In addition, the releasability from the molding die deteriorates, the balance of the whole mold release is broken, and there arises a problem that the molded product is deformed.

Therefore, the present invention does not require a separate member for attachment to the instrument panel, improves the production efficiency and the efficiency of the mounting operation, and provides a sufficient attachment portion to the instrument panel. An object of the present invention is to provide an airbag cover which is reinforced so as to have excellent strength, has excellent appearance without causing sink marks on the surface, and has excellent releasability from a molding die.

[0010]

To achieve the above object, the present invention relates to an airbag cover provided with a locking portion to a vehicle body at a part of a periphery thereof, wherein the locking portion is provided on a back surface of the cover. consists locking pawl that protrudes integrally molded from, is connected to the back of the locking pawls, and a reinforcing rib that protrudes molded from the back surface of the cover, when projecting from the back surface of the cover co
At the back of the locking claw piece.
It and a claw piece supporting portion disposed at a position in contact, the
Prevents extreme bending deformation of the locking claw by claw support
The main configuration is an airbag cover characterized by being made as described above. In the present airbag cover, the locking claw pieces are integrally formed on the back surface of the cover, so that it is not necessary to separately attach an engaging member such as a clip as in the related art, thereby improving the manufacturing capacity. At the same time, the clip does not fall off when the clip is attached to the instrument panel, so that the working efficiency is improved. In addition, a claw piece support portion is provided at a position close to the back surface of the locking claw piece, and the locking claw piece is reinforced, so that the base of the locking claw piece is particularly distinguished. It does not need to be thick and does not cause sink marks on the cover surface. In addition, since the strength of the locking claw pieces is improved, the strength of engagement with the instrument panel is also improved.

In a preferred embodiment of the claw support portion, there are a resin pin, a tube-shaped projection, and the like. These claw support portions can be integrally formed of the same resin as the airbag cover at the same time. An airbag cover molded in advance with a resin having higher hardness may be integrally molded. Conventionally, it was difficult to release the airbag cover from the molding die, but by disposing the claw piece supporting portion at a position corresponding to the projecting pin of the molding machine,
Using the claw support portion, the claw support portion is protruded by the protruding pin to easily release the mold. In addition, although a sink is originally likely to occur in a portion corresponding to the nail piece supporting portion on the surface of the airbag cover, it is easy to further increase the sink due to a pull caused by biting into the mold at the time of release. ,
By protruding the claw piece support portion with a pin at the time of release from the mold, the sink is almost completely eliminated.

The protruding length of the claw piece supporting portion is appropriately set according to the shape of the locking claw piece, the portion to which it is engaged, and the shape of the same portion. And the claw piece support portion is set to a height substantially equal to the height of the stem portion of the locking claw piece including the stem portion and the claw portion. It is also possible.
Further, it is preferable that the claw piece supporting portions are provided on both left and right ends on the rear side of the locking claw piece, in which case the reinforcing effect of the locking claw piece is further enhanced. Further, the peripheral surface of the claw piece supporting portion and the back surface of the locking claw can be directly connected, and the peripheral surface of the claw piece supporting portion and the back surface of the locking claw are formed on the back surface of the cover. In some cases, the connection is made via the ribs provided.

It is preferable that ribs are formed in a lattice pattern on the back surface of the cover, and a tube-shaped projection is formed at a part of an intersection of the ribs. When the ribs are formed in a lattice shape, the strength of the locking claw pieces is further improved, and in particular, when a tube-shaped projection is formed at the intersection of the rib, tearing at the intersection is prevented. In addition, the ribs are hardly deformed, and the reinforcing effect is increased.

An opening is formed on the upper surface of the instrument panel, and an airbag module containing an airbag, an inflator and the like is mounted inside the opening.
The above-described airbag cover, which is one of the components of the airbag module, is pressed from above in accordance with the opening and fitted into the opening, and the locking claw piece is engaged with the engaging edge of the opening. And is fixedly attached to the instrument panel. At the time of this engagement, the locking claw resiliently contacts the edge of the opening. However, since the back of the claw is supported by the claw supporting portion, no extreme bending deformation occurs, and the claw is not deformed. Can be smoothly fitted into the opening without deteriorating the strength.

Now, when the inflator is activated to generate gas, high-pressure gas flows into the airbag to rapidly inflate the airbag, and at the same time the airbag cover is torn along the tear line and deployed. I do. At this time, the airbag cover attempts to jump upward, but as described above, the airbag cover of the present invention has the locking claw pieces reinforced from the back surface by the claw piece supporting portions. The airbag cover does not come off from the engaging edge of the opening, and the airbag cover remains firmly attached to the instrument panel and does not hurt the occupant.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be specifically described based on typical examples. FIG. 1 is a cross-sectional view of an airbag module to which an airbag cover 70 according to a first embodiment of the present invention is attached. FIG. 2 is a rear view of the airbag cover 70, and a cross-section of the airbag cover 70 of FIG. Corresponds to a cross section taken along the line II in FIG. The airbag module 1 includes an inflator 2
And a small folded airbag 3
And an upper open end 4 of the retainer 4.
and an airbag cover 70 that closes a. The retainer 4 is fixed to the vehicle body by bolts or the like via a bracket 5 projecting from a support shaft provided in the vehicle body, and the airbag cover 70 is attached to an opening 6 a formed in the instrument panel 6. I'm moored. Since the inflator 2 and the airbag 3 have a conventionally well-known structure, detailed description thereof is omitted here, and the structure of the airbag cover 70 which is a feature of the present invention will be specifically described. I do.

The airbag cover 70 has a substantially rectangular plate-shaped cover main body 71, and an H-shaped thin portion (tea line) 71a is formed at the center of the cover main body 71. A rectangular wall 72 surrounding the tear line 71a protrudes from the center of the rear surface of the cover main body 71, and ribs 73 are formed around the wall 72 in a lattice pattern. A tube-like projection 78 is formed at a part of the intersection of the lattice-shaped ribs 73 to prevent tearing at the intersection of the ribs 73 and to prevent the ribs 73 from falling or deforming. .

Further, a plurality of front locking claw pieces 74 are provided at predetermined intervals from the back surface of the front and rear peripheral portions of the cover body 71.
The rear locking claw piece 75 is integrally formed so as to protrude. The locking pawl pieces 74 and 75 are respectively provided with stem portions 74a and 7
5a and the claw portions 74b and 75b.
Triangular wall portions 74c and 75c are formed at both ends of b and 75b, and the claw portions 74b and 75b face outward. At the left and right ends on the back side of the front locking claw piece 74, a front pin 76 as a claw piece supporting portion is integrally formed to protrude from the back surface of the cover body 71. The peripheral surface of the front pin 76 is connected to the back surface of the front locking claw piece 74 via the rib 73, and the front pin 76 has substantially the same protruding length as the claw piece 74. . On the other hand, on the left and right ends on the rear side of the rear locking claw 75, a rear pin 77 serving as a claw supporting portion is provided from the back of the cover body 71.
Are formed integrally with each other. The peripheral surface of the rear pin 77 is directly connected to the rear surface of the rear locking claw 75, and has substantially the same projection length as the claw 75. Therefore, both the front and rear locking claw pieces 74 and 75 are reinforced by front and rear pins 76 and 77 over the entire length.

The airbag cover having the above structure is formed by injection molding. Conventionally, it was difficult to release the mold from the mold after molding. However, the airbag cover of the present invention is formed with the pins 76 and 77 having appropriate strength.
Utilizing the pins 76, 77, the pins 76,
A projecting pin is provided at a position corresponding to 77, and the pins 76 and 77 are projected by the projecting pin, and can be easily released from the mold. In addition, since the pins 76 and 77 have a diameter larger than the thickness of the ribs 73, the surface of the airbag cover corresponding to the pins 76 and 77 is liable to sink, and in particular, the pins 76 and 77 may be removed into the mold at the time of release. Although it is easy to further increase the sinkage based on the pull due to the bite, since the pins 76 and 77 are protruded by the projecting pins of the mold as described above, the pulling does not occur and the sinking due to the pulling is prevented. In addition, sinks due to the original molding almost completely disappear.

Since the airbag cover 70 is made of a soft material, when the airbag cover 70 is pushed in from above in accordance with the opening 6a formed in the instrument panel 6, the locking claw pieces 74 and 75 are pressed. Claw portions 74b, 7
The slopes of the walls 74c, 75c formed on the 5b are in contact with the peripheral edge of the opening 6a, and the claw pieces 74, 75 are pushed in while being elastically deformed inward, and the claw portions 74b, 75b are moved into the opening 6a. When housed inside, the claw pieces 74 and 75 return to the outside, and are engaged and fixed to the peripheral edge of the opening 6a,
The engagement work is easy and can be performed in a short time.

Further, at the time of the pushing, the locking claw pieces 74 and 75 are reinforced by connecting the claw supporting portions 76 and 77 to the rear side, respectively. It does not deform toward the side (outside) but always deforms inward, and the engagement work is performed smoothly. Furthermore, since the claw pieces support portions 76 and 77 prevent the claw pieces 74 and 75 from being extremely deformed, the engagement strength can be maintained.

The front locking claw piece 75 is directly connected to the rear claw piece supporting portion 77 on the back surface thereof.
The front locking pawl 74 is connected to the front pawl supporting portion 76 via the rib 73. In the case of direct connection, the reinforcing effect is greater than in the case where the ribs 73 are interposed. However, in the case where the ribs 73 are interposed, the deformation is inward due to the slight space formed by the ribs 73. And the fitting operation becomes easy. Therefore, whether or not to interpose the rib 73 is appropriately selected depending on the position where the locking claw pieces 73 and 74 are formed.

When the inflator 2 operates to generate gas, high-pressure gas flows into the airbag 3 to rapidly inflate the airbag 3, and at the same time, the airbag cover 70 moves along the tear line 71a. Torn. At this time, the airbag cover 70 tends to fly upward, but as described above, in the airbag cover 70 of the present invention, the locking claw pieces 74 and 75 are reinforced from the back surface by the claw piece supporting portions 76 and 77. Therefore, the claw pieces 74 and 75 are not deformed, and the engagement state of the airbag cover 70 with the instrument panel 6 can be reliably maintained.

3 to 5 show an airbag cover 80 according to a second embodiment of the present invention, and FIG.
FIG. 4 is a cross-sectional view taken along the line II-II in FIG.
FIG. 5 is a cross-sectional view showing a state when the airbag cover 80 is engaged with the instrument panel 6. The airbag cover 80 is also attached to the instrument panel 6. The instrument panel 6 has an opening 6a for accommodating an airbag module therein as well as the above-described embodiment. A plurality of engaging holes 6b are separately formed in front of (on the left side in FIG. 4) 6a, and the front peripheral portion of the airbag cover 80 including the engaging holes 6b is formed on the periphery of the opening 6a of the instrument panel 6. It is located above.

In the airbag cover 80, a U-shaped tear line 81a is formed at a position slightly deviated rearward from the cover body 81. A rectangular wall portion 82 projects from the back surface of the cover body 81 surrounding the tear line 81a, and ribs 83 are formed around the wall portion 82 in a lattice pattern. The ribs 83 are prevented from being torn or deformed by forming a tubular projection 88 at a part of the intersection of the ribs 83.

Further, a plurality of rear locking claw pieces 84 are integrally formed at predetermined intervals from the rear surface of the rear peripheral edge of the cover main body 81, and the rear locking claw pieces 84 are formed from the rear surface position corresponding to the engaging holes 6b. The front locking claw 85 is integrally formed to protrude. The locking claw pieces 84 and 85 have stem portions 84a and 85a and claw portions 84b and 85b, respectively. Triangular wall portions 84c and 84b are provided at both ends of the claw portions 84b and 85b.
85c is formed, and the claw portions 84b, 85b face outward. The front locking claw 85 engaged with the engagement hole 6b can also be formed by forming the claw portion 85b inward and engaging with the rear edge of the engagement hole 6b. It is.

The rear locking claw 84 and the front locking claw 8
A rear pin 86 and a front pin 87 are integrally formed to protrude along both left and right ends on the back side of the rear surface 5, respectively.
The claw pieces 84 and 85 are reinforced by being connected to the back surface of the rib 85 via the ribs 83. In this embodiment, the rear pin 86 has substantially the same protruding length as the rear locking claw piece 84, and the claw piece 84 is reinforced over the entire length. The third embodiment is different from the first embodiment in that the projection length is set to be substantially the same as that of the stem portion 85a of the front locking claw piece 85. FIG. 5A shows a state in which the front locking claw piece 85 is engaged.
FIG. 5B shows a state in which the rear locking claw piece 84 is engaged.
Shown in

Since the front pin 87 formed on the rear side of the front locking claw 85 is set to have substantially the same protruding length as the stem 85a of the claw 85, the airbag cover 80 is When pressed from above, the claw portion 85b of the claw piece 85 elastically contacts the periphery of the engaging hole 6b of the instrument panel 6, and as shown by the imaginary line in FIG. Although it is not deformed by being supported by 87, the claw portion 85b is easily deformed inward because there is no support at all. Therefore, the attachment work is facilitated, and even if the locking claw piece is less flexible than the soft material used in the above-described embodiment, for example, a resin having less elasticity, it can be easily deformed. The range of choice of resin according to shape and cost is expanded.

When a resin having low elasticity is used, the rear locking claw piece 84 having the rear pin 86 having substantially the same length on the rear side is reinforced over the entire length. Therefore, the airbag cover 80 can hardly bend toward the back side (inside), but the airbag cover 80 is inclined as shown in FIG. The airbag cover 80 can be easily attached to the instrument panel 6 by engaging the front locking claw piece 85 with the engagement hole 6b in the manner described above. Can be engaged.

In the above-described second embodiment, all of the tubular projections 88 have the same projection length as the ribs 83. As a modification of the tubular projection 88,
For example, as shown in FIG. 6, a tubular projection 89 disposed above the periphery of the opening 6a of the instrument panel 6.
Can be projected to such an extent that a slight gap is left between the instrument panel 6 and the upper surface. In such a case, even if the surface of the airbag cover 80 is pressed with a strong force, the tubular projection 89 may be attached to the instrument panel 6.
To prevent the airbag cover 80 from sticking. As shown in FIG. 7, a rib 83 is connected to the tubular projection 89, and a rib portion 83 'at the connection portion is provided so as to protrude to a length in contact with the upper surface of the instrument panel 6. When the vibrator vibrates violently, the gap between the tubular protrusion 89 and the instrument panel 6 can be maintained, and in addition to preventing sticking, the tubular protrusion 89 can be prevented from hitting the instrument panel 6 and the abnormal sound can be prevented. To prevent the occurrence of

As shown in FIG. 8, a tubular projection 90 which is another modification of the tubular projection 88 has a projecting length between the rear surface of the airbag cover 80 and the upper surface of the instrument panel 6. A projection insertion hole 6c is formed at a position corresponding to the projection 90 of the instrument panel 6, and the tubular projection 90 is inserted into the projection insertion hole 6c. Further, the rib 83
It is preferable that the adjacent portion 83 ′ of the tubular projection 90 is provided so as to always be in contact with the upper surface of the instrument panel 6, similarly to the above-mentioned projection 89. In this case, in addition to the effects described above, the positioning accuracy of the airbag cover 80 with respect to the instrument panel 6 is improved.

In each of the first and second embodiments, a pin formed integrally and simultaneously is used as the claw support portion. For example, a pin formed with a small flexibility and a large strength is used in advance. It is also possible to integrally mold and fix the airbag cover at the time of molding. In addition, it is also possible to use a tube-shaped projection instead of the pin, in which case sink marks generated on the surface of the airbag cover can be almost completely eliminated.

[0033]

As is clear from the above description, according to the airbag cover of the present invention, the locking claw as a locking portion to the instrument panel is integrally formed, so that the production capacity is reduced. In addition to the improvement, unlike the conventional case where a separate clip made of a leaf spring material is attached, the locking portion does not fall off during the engagement work, and the work efficiency is improved. Further, at a position close to the back surface of the locking claw, the protrusion protrudes from the back surface of the cover and the reinforcing claw and the reinforcement
Since the claw piece supporting portion is integrally connected to the locking claw piece via the rib or the reinforcing rib, the strength of the locking claw piece is improved. Further, when releasing the airbag cover from the mold, the claw piece support portion is used, and a protruding pin is provided at a position corresponding to the support portion in the molding machine, so that the support portion can be protruded. In this case, sinking due to the pulling of the locking claw pieces and ribs, etc. due to the biting of the mold, as in the conventional case, can be prevented, and the original position can be reduced to the portion where the locking claw pieces and ribs exist. Incoming sinks will almost disappear due to protrusion.

Also, during the work of engaging with the instrument panel, the locking claw is supported by the claw support from the back, so that it is smoothly deformed to the back without deforming to the front. . Since the deformation to the plane side at the time of the engagement work is regulated by the claw piece support portion, the locking claw piece is not extremely bent and deteriorated, and the attachment strength is also improved. Therefore, even when the airbag is inflated, the locking claw pieces reinforced from the back by the claw piece supporting portions are firmly attached to the instrument panel without coming off from the engaging portions, and do not damage the occupant.

A lattice-shaped rib is projected from the back surface of the airbag cover, and a rib-like projection is formed at the intersection of the rib to prevent the rib from being broken or deformed. Further, in the case where the length of the tube-shaped protrusion or the protrusion of the rib is protruded from the periphery of the airbag cover located above the opening edge of the instrument panel to the extent that it comes into contact with the opening edge of the instrument panel. The stickiness of the airbag cover can be prevented by the tubular protrusions or ribs.

[Brief description of the drawings]

FIG. 1 is a sectional view of an airbag module with an airbag cover according to a first embodiment of the present invention.

FIG. 2 is a rear view of the airbag cover.

FIG. 3 is a rear view of an airbag cover according to a second embodiment of the present invention.

FIG. 4 is a sectional view taken along the line II-II in FIG. 3;

FIG. 5 is a cross-sectional view showing a state when the airbag cover is engaged with an instrument panel.

FIG. 6 is a cross-sectional view showing a modified example of the tubular projection.

FIG. 7 is a cross-sectional view showing a modification of the tube-shaped protrusion and the lattice-shaped rib.

FIG. 8 is a cross-sectional view showing another modification of the tube-shaped protrusion and the lattice-shaped rib.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Airbag module 2 Inflator 3 Airbag 4 Retainer 4a Upper open end 5 Bracket 6 Instrument panel 6a Opening 6b Engagement hole 6c Projection insertion hole 70 Airbag cover 71 Cover main body 71a Tea line 72 Wall 73 Rib 74 Front locking Claw piece 74a Stem section 74b Claw section 74c Wall section 75 Back locking claw piece 75a Stem section 75b Claw section 75c Wall section 76 Front pin 77 Back pin 78 Tubular projection 80 Airbag cover 81 Cover body 81a, 81a Tea line 82 Wall Part 83 rib 83 'rib part 84 rear locking claw 84a stem 84b claw 84c wall 85 front locking claw 85a stem 85b claw 85c wall 86 rear pin 87 front pin 88 tubular projection 89 90 tube-shaped protrusion

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-131888 (JP, A) JP-A-6-344850 (JP, A) JP-A-6-63450 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) B60R 21/16-21/32

Claims (10)

(57) [Claims] 1. An airbag cover having a locking portion to a vehicle body at a part of a periphery thereof, wherein the locking portion is formed by a locking claw piece integrally formed so as to protrude from a back surface of the cover. A reinforcing rib connected to the back surface of the locking claw and protruding from the back surface of the cover;
At the back of the locking claw piece.
It and a claw piece supporting portion disposed at a position in contact, the
Prevents extreme bending deformation of the locking claw by claw support
An airbag cover characterized by being made. 2. The airbag cover according to claim 1, wherein the claw piece supporting portion is a resin pin. 3. The airbag cover according to claim 1, wherein said claw piece supporting portion is a tubular projection. 4. The airbag cover according to claim 1, wherein said claw piece supporting portion has a protrusion length substantially equal to a protrusion length of said locking claw piece. 5. The air according to claim 1, wherein said locking pawl comprises a stem portion and a pawl portion, and said pawl supporting portion has a height substantially equal to a height of said stem portion. Bag cover. 6. The airbag cover according to claim 1, wherein said claw piece supporting portions are provided at left and right ends on the back side of said locking claw pieces. 7. The airbag cover according to claim 1, wherein a peripheral surface of the claw piece supporting portion and a back surface of the locking claw are directly connected. 8. The airbag cover according to claim 1, wherein a peripheral surface of the claw piece supporting portion and a back surface of the locking claw are connected via a rib formed on a back surface of the cover. 9. The airbag cover according to claim 1, wherein ribs are formed in a grid pattern on the back surface of the cover, and a tube-shaped projection is formed at a part of an intersection of the ribs. 10. The airbag cover according to claim 1, wherein said claw piece supporting portion is arranged at a position corresponding to a protruding pin of a molding machine.