KR102546930B1 - Airbag cover for vehicle - Google Patents

Abstract

It relates to an airbag cover for a vehicle, which is formed in a substantially cylindrical shape with open top and bottom surfaces and includes a side wall portion coupled to a steering wheel and an upper plate shielding the top of the side wall portion, and a bezel ring is coupled to the top plate A coupling portion in which a coupling space is formed is provided, and a configuration in which a deformation prevention portion is provided to prevent deformation by reinforcing the rigidity of the coupling portion when the airbag cushion is inflated and deployed, thereby increasing the stiffness of the portion to which the bezel ring is coupled. It can be reinforced to prevent deformation during inflation and deployment of the airbag cushion.

Description

Airbag cover of automobile {AIRBAG COVER FOR VEHICLE}

The present invention relates to an airbag cover for a vehicle, and more particularly, to an airbag cover for a vehicle coupled to a steering wheel of a vehicle and having a bezel ring coupled to an upper surface thereof.

A driver's seat airbag device applied to automobiles is widely used to protect a passenger in a driver's seat from an impact generated during a vehicle collision.

Such a driver's seat airbag device is generally mounted on a steering wheel, and includes an inflator, an airbag cushion, a housing accommodating the airbag cushion in a folded state, and a cover covering an opening of the housing.

When a car crashes, the airbag cushion expands as gas is injected from the inflator, and when the cover made of soft resin is ruptured by the expansion force of the airbag cushion and an opening is formed in the cover, the airbag cushion is inflated toward the occupant of the vehicle through the opening.

A cover having a decorative plate called an emblem may be installed in such a driver's seat airbag device.

For example, patent document 1 and patent document 2 below disclose an airbag cover technology.

On the other hand, an emblem is generally made with a design or mark of a company, and does not simply mean a manufacturing company in a vehicle, but functions to give the value of the vehicle expressed by the emblem.

The emblem is installed on the exterior and interior of the vehicle to reveal the value of credit accumulated in the emblem, and the location where the emblem is installed varies depending on the company that manufactures the vehicle, but is mostly installed on the rear of the vehicle and the front of the steering wheel.

That is, it is installed on an airbag cover covering an armature installed in the center of a steering wheel steered by a passenger driving a vehicle.

Republic of Korea Patent Registration No. 10-1718689 (Announced on March 22, 2017) Korean Patent Registration No. 10-2005738 (published on July 31, 2019)

On the other hand, in the airbag cover according to the prior art, along with the emblem, a circle, oval, or polygonal bezel ring surrounding the emblem may be installed.

To install the bezel ring, a coupling space to which the bezel ring is coupled is formed in the airbag cover, and a plurality of coupling holes to which a plurality of coupling protrusions formed on the bezel ring are coupled are formed along the coupling space.

In this way, when the emblem and bezel ring made of metal materials such as aluminum or steel are installed, the airbag cover according to the prior art is relatively stable in the airbag cover in the process of the airbag cushion tearing the airbag cover and inflating and deploying to the outside of the airbag cover. As a result, many moments act on the weak point.

Therefore, the airbag cover according to the prior art is deformed by a moment acting during deployment of the airbag cushion, and there is a problem in that the coupling protrusions of the bezel ring coupled to some coupling holes are separated from the coupling grooves.

Accordingly, the airbag cover according to the prior art has a problem in that the bezel ring is separated from the airbag cover during the deployment process of the airbag cushion when a car crash occurs, causing a safety accident such as injury to an occupant.

An object of the present invention is to solve the above problems, and to provide an airbag cover for a vehicle capable of preventing deformation due to a moment generated during deployment of an airbag cushion.

Another object of the present invention is to provide an airbag cover for vehicles capable of preventing separation and detachment of a bezel ring coupled to the airbag cover.

In order to achieve the above object, an airbag cover for a vehicle according to the present invention is formed in a substantially cylindrical shape with open top and bottom surfaces and includes a side wall portion coupled to a steering wheel and an upper plate shielding the top of the side wall portion. And, the upper plate is provided with a coupling portion in which a coupling space to which the bezel ring is coupled is formed, and a deformation prevention portion is provided in the coupling portion to prevent deformation by reinforcing the rigidity of the coupling portion when the airbag cushion is inflated and deployed. do.

As described above, according to the airbag cover for a vehicle according to the present invention, the stiffness of the portion to which the bezel ring is coupled is reinforced to prevent deformation of the airbag cushion during inflation and deployment.

That is, according to the present invention, the effect of preventing deformation by applying a deformation preventing portion to the coupling portion to reinforce the rigidity of coupling holes formed along the bending line is obtained.

And according to the present invention, the effect that the rigidity of the coupling hole and the guide portion can be reinforced by widening the width of the guide portion formed around the coupling hole is obtained.

Accordingly, according to the present invention, it is possible to prevent deformation by reinforcing the rigidity of the coupling hole formed on the bending line where the bending moment is concentrated when the airbag cushion is inflated and deployed.

As a result, according to the present invention, by preventing the bezel ring from being separated from the airbag cover in the process of inflating and deploying the airbag cushion, safety accidents such as injury to occupants due to the bezel ring can be prevented in advance. .

In addition, according to the present invention, by applying a reinforcing part to the coupling part to which the bezel ring is coupled to reinforce the rigidity of the coupling part, deformation of the airbag cover due to heat can be prevented in the process of fixing the bezel ring to the airbag cover by thermal fusion. effect is obtained.

1 is a perspective view of an airbag cover for a vehicle according to a preferred embodiment of the present invention;
2 is an exploded perspective view showing a disassembled state of the bezel ring shown in FIG. 1;
3 is a bottom view of the airbag cover shown in FIG. 1;
4 is a bottom view of an airbag cover for a vehicle according to another embodiment of the present invention.

Hereinafter, an airbag cover for a vehicle according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of an airbag cover of a vehicle according to a preferred embodiment of the present invention, FIG. 2 is an exploded perspective view showing a disassembled state of the bezel ring shown in FIG. 1, and FIG. 3 is an airbag cover shown in FIG. 1 It is a bottom view.

Hereinafter, the direction toward the engine room of the vehicle centered on the steering wheel is referred to as 'front (F)', and the opposite direction is referred to as 'rear (B)'. In addition, terms indicating directions such as 'left (L)', 'right (R)', 'upper (U)' and 'downward (D)' indicate respective directions based on the front and rear define it as

In this embodiment, the emblem 11 and the bezel ring 12 are each described as a circular ring having an approximately 'ALV' shape and a substantially circular cross section, but the present invention is not necessarily limited thereto, and represents products or manufacturers. It should be noted that it can be changed into various shapes formed by possible figures, characters, symbols, or combinations thereof.

As shown in FIGS. 1 to 3 , the airbag cover 10 of a vehicle according to a preferred embodiment of the present invention is formed in a substantially tubular shape with open top and bottom surfaces and includes a side wall portion 20 coupled to a steering wheel, and It includes an upper plate 30 shielding the top of the side wall portion 20 .

The side wall portion 20 may be formed in a tubular shape having various shapes such as a circular shape, an elliptical shape, or a square shape when viewed from above so as to correspond to a coupling space formed on an upper surface of the steering wheel.

A lower cover (not shown) for shielding the lower surface of the side wall portion 20 may be coupled to the lower portion of the side wall portion 20 .

The upper plate 30 may be formed in various shapes such as a substantially circular shape, an elliptical shape, and a polygonal shape. Here, the upper plate 30 is formed with a larger cross-sectional area than the cross-sectional area of the side wall portion 20 so as to shield the upper end of the side wall portion 20 .

The emblem 11 and the bezel ring 12 may be coupled to the upper plate 30 .

To this end, first and second coupling portions 31 having first and second coupling spaces 33 and 34 in which the emblem 11 and the bezel ring 12 are coupled to each other are formed on the upper surface of the upper plate 30; 32) can be provided.

The present invention will be described focusing on a configuration for preventing deformation due to a bending moment generated in the second coupling portion 32 to which the bezel ring 12 is coupled. So, hereinafter, the second coupling portion 32 and the second coupling space 34 are abbreviated as coupling portion 32 and coupling space 34, respectively.

A coupling space 34 having various shapes such as a circular shape, an elliptical shape, or a polygonal shape may be formed inside the coupling part 32 to correspond to the bezel ring 12 .

That is, the coupling part 32 is formed convex downward from the lower surface of the upper plate 30, and the coupling space 34 has a volume corresponding to the volume of the bezel ring 12 and is downward from the upper surface of the upper plate 30. A concave can be formed.

Here, a plurality of coupling protrusions 13 protrude downward from the lower surface of the bezel ring 12, and a plurality of coupling holes 35 through which the plurality of coupling protrusions 13 are penetrated are formed in the coupling part 32. It can be.

So, when the bezel ring 12 is coupled to the coupling space 34, the plurality of coupling protrusions 13 are coupled to the plurality of coupling holes 35, respectively. Here, as the length of the plurality of coupling protrusions 13 in the vertical direction is longer than the depth of the coupling hole 35, they protrude to the lower portion of the coupling portion 32 through the coupling hole 35.

In this way, the lower end of each coupling protrusion 13 protruding to the lower portion of the coupling portion 32 through the coupling hole 35 is melted by applying heat to the coupling portion 32 of the upper plate 30 in a thermal fusion method. ) is fused to the lower surface.

That is, the lower end of the coupling protrusion 13 is melted by heat and formed on the lower surface of the coupling portion 32 while forming a substantially circular or elliptical fusion portion 14 so as to have an area larger than that of the coupling hole 35. is fused

On the lower surface of the coupling portion 32 of the upper plate 30, a plurality of guide portions 36 formed in a substantially circular or elliptical shape are provided around each coupling hole 35 so as to guide the shape of each fusion portion 14. It can be.

In this way, the bezel ring 11 installed on the airbag cover 10 is fixed by thermal fusion.

Therefore, the airbag cover 10 may be deformed by heat during the process of fixing the bezel ring 12 by thermal fusion.

In order to prevent deformation of the airbag cover due to such heat, a reinforcing portion 37 may be provided in the coupling portion 30 to prevent deformation by reinforcing rigidity of the coupling portion 30 .

The reinforcing part 37 may include a plurality of pairs of reinforcing ribs extending from the front and rear sides of the center of each coupling hole 35 .

That is, each pair of reinforcing ribs may be formed extending toward the front and rear, respectively, on the front and rear sides of each coupling hole 35 formed in the coupling portion 32 .

Therefore, a reinforcing part 37 including a plurality of pairs of reinforcing ribs may be formed in the coupling part 32 at the front and rear sides of each coupling hole 35 .

In this way, the present invention can prevent deformation of the airbag cover due to heat in the process of fixing the bezel ring to the airbag cover by thermal fusion by applying a reinforcing part to the coupling part to which the bezel ring is coupled to reinforce the rigidity of the coupling part. .

Meanwhile, an incision line 40 is formed in the airbag cover 10 so that the airbag cushion expands and deploys when a vehicle collision occurs.

As shown in FIGS. 2 and 3, the incision line 40 is approximately 'H' shape or It may be formed in a '(-)' shape.

So, when the airbag cushion is inflated and deployed, the incision line 40 is cut, and as shown in FIG. 1, the front part of the upper plate 30 rotates forward with respect to the incision line 40, and The posterior part of the rotates backward.

That is, the front part of the upper plate 30 rotates forward about the front end of the upper plate 30 while the cutting line L is cut.

Here, a bending line B serving as a center line around which the front portion of the upper plate rotates may be formed at the front end of the upper plate 30 .

As the front side of the top plate 30 rotates forward around the bending line B formed at the front end of the top plate 30 as described above, the coupling portion 32 formed at the front end of the top plate 30 At the front end of the bending moment (bending moment) acts intensively.

For example, the bending moment due to the expansion and deployment of the airbag cushion is concentrated in the coupling holes around the bending line B, that is, the four coupling holes 35 located on both sides of the center line of the upper plate 30 as seen in FIG. 3 It can be. Then, the four coupling holes 35 may be deformed so that the length in the front-back direction becomes longer.

When the coupling holes 35 located around the bending line B are deformed, the fusion portions 14 of the coupling protrusions 13 coupled to the corresponding coupling holes 35 ) can be separated from

For this reason, when the bezel ring 12 is separated from the airbag cover 10 and flies toward the occupant, a safety accident such as injury to the occupant may occur.

In order to solve this problem, the present invention prevents deformation by reinforcing the rigidity of the coupling holes 35 around the bending line (B).

For example, FIG. 4 is a bottom view of an airbag cover for a vehicle according to another embodiment of the present invention.

As shown in FIG. 4 , an airbag cover 10 for a vehicle according to another embodiment of the present invention has the same configuration as the airbag cover 10 described with reference to FIGS. 1 to 3 , but has a bending line B It further includes a deformation preventing portion 41 for preventing deformation by reinforcing the rigidity of the coupling holes 35 formed along the.

The deformation preventing part 41 may include a plurality of reinforcing ribs formed on both sides of each coupling hole 35 .

For example, a total of five reinforcing ribs may be provided as they are provided between and outside the four coupling holes 35, respectively.

Each reinforcing rib may be formed to extend along the front and rear directions on the lower surface of the upper plate 30 .

These reinforcing ribs may protrude downward from the lower surface of the upper plate 30 at a higher height than the coupling part 32 .

Of course, the present invention is not necessarily limited thereto, and the number and shape of the reinforcing ribs may be variously changed.

For example, the reinforcing ribs may be changed to be formed radially from the center point of the upper plate 30 as well as a linear shape along the front-back direction.

And the reinforcing ribs are changed to be formed between and outside the coupling holes 35 located on the bending line B, as well as the coupling holes 35 close to the bending line B or the entire coupling holes 35, respectively. It could be.

On the other hand, in the present embodiment, the guide portion 36 formed around the plurality of coupling holes 35 located on the bending line B is the guide shown in FIG. 3 to prevent deformation of each coupling hole 35. The width W2 of the portion 36 may be wider than that of the width W1 (W1<W2).

For example, when the width W1 of the guide part 36 shown in FIG. 3 is about 1 mm, the guide part may be formed with a width of about 2 mm or more to have a wider width W2 than about 1 mm. Yes (W1<W2).

In particular, when the airbag cushion is inflated and deployed, the bending moment acting on the airbag cover 10 is greater in the front-back direction than in the left-right direction.

Therefore, it is preferable that the front end of the guide part 36 has a larger width than the rest of the predetermined width.

Of course, both ends and rear ends of the guide portion 36 may also be formed to have a width W3 set larger than the width W1 of the guide portion 36 shown in FIG. 3 (W1 < W3).

In addition, the inner circumferential surface of the guide portion 36 may be formed in a substantially circular or elliptical shape to guide the shape of the fused portion 14, and the outer circumferential surface of the guide portion 36 may be formed in a polygonal shape such as a square shape or a hexagonal shape. .

In this way, the present invention can prevent deformation by applying a deformation preventing portion to the coupling portion to reinforce the rigidity of coupling holes formed along the bending line.

And the present invention can reinforce the rigidity of the coupling hole and the guide portion by widening the width of the guide portion formed around the coupling hole.

Accordingly, the present invention can prevent deformation by reinforcing the rigidity of the coupling hole formed on the bending line where the bending moment is concentrated during the inflation and deployment of the airbag cushion.

For this reason, the present invention can prevent safety accidents such as injury to occupants due to the bezel ring by preventing the bezel ring from being separated from the airbag cover in the process of inflating and deploying the airbag cushion.

Although the invention made by the present inventors has been specifically described according to the above embodiments, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention.

The present invention is applied to a vehicle airbag cover technology that prevents deformation during inflation and deployment of an airbag cushion by reinforcing the rigidity of a portion to which a bezel ring is coupled.

10: car airbag cover
11: emblem 12: bezel ring
13: coupling protrusion 14: fusion part
20: side wall
30: upper plate
31, 32: first and second coupling parts
33,34: first, second combining space
35: coupling hole 36: guide unit
37: reinforcement part
40: incision line 41: deformation prevention unit
B: bending line

Claims (8)

A side wall portion formed in a tubular shape with an open top and bottom surface and coupled to a steering wheel; and
Including an upper plate shielding the upper end of the side wall portion,
The upper plate is provided with a coupling portion in which a coupling space to which the bezel ring is coupled is formed,
The coupling portion is provided with a deformation preventing portion for preventing deformation by reinforcing the rigidity of the coupling portion when the airbag cushion is inflated and deployed,
A plurality of coupling holes into which a plurality of coupling protrusions formed in the bezel ring are penetrated are formed in the coupling portion,
The deformation preventing portion includes a plurality of reinforcing ribs formed between and outside the plurality of coupling holes to prevent deformation by reinforcing the rigidity of each coupling hole,
A guide portion is provided around the plurality of coupling holes to guide the shape of the fusion portion in which the lower ends of the plurality of coupling protrusions through-coupled to each coupling hole are fused,
The airbag cover of a vehicle, characterized in that the guide portion is formed to a predetermined width or more to reinforce the rigidity of the coupling hole. delete According to claim 1,
The reinforcing ribs are formed between and outside coupling holes formed on a bending line functioning as a rotational axis of the front end of the upper plate that rotates forward around the incision line formed in the upper plate when the airbag cushion is inflated and deployed. airbag cover of a car to be. According to claim 3,
The reinforcing rib is formed to protrude downward from the lower surface of the upper plate at a height higher than the height of the coupling part. According to claim 3,
The reinforcing rib is an airbag cover for a vehicle, characterized in that it extends in a straight line along the front-rear direction on the lower surface of the upper plate. According to claim 3,
The reinforcing rib is formed radially from the center point of the upper plate. delete The method of any one of claims 1 and 3 to 6,
Reinforcing parts for reinforcing the rigidity of the coupling holes are provided in the plurality of coupling holes to prevent deformation during thermal fusion of the coupling protrusions,
The reinforcing part includes a plurality of pairs of reinforcing ribs extending forward and rearward from each coupling hole.

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