KR20170132366A - Air bag device for driver - Google Patents

Abstract

The present invention relates to an airbag device for a driver, which comprises: a housing unit having an airbag module mounted thereon, and moving backwards by an external force to induce horn operation; a holder unit formed in the housing unit; a clip unit attached to and detached from the holder unit; and a steering wheel unit mounted in the housing unit to detect the horn operation, capable of steering operation, and mounted in the clip unit to maintain a coupling state with the housing unit. Therefore, the number of components is reduced, and assemblability can be improved.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an airbag device for a driver's seat,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an airbag device for a driver's seat. More particularly, the present invention relates to an airbag device for a driver's seat, in which the number of parts is reduced and assembling property is improved.

In general, the air bag system of an automobile inflates the air bag instantaneously between the driver and the steering wheel in the collision or between the passenger and the instrument panel in the collision, separately from the seat belt, Thereby reducing the size of the apparatus.

Among these airbag systems, an airbag system for a driver of a driver's seat includes an inflator for generating gas by ignition of a primer, an airbag inflated and deployed toward the driver's seat by the generated gas, an inflator, and a cover member provided on the steering wheel An impact sensor for generating an impact signal in the event of an impact, an electronic control module for igniting the primer of the inflator according to the impact signal, .

Conventionally, a snap-fit structure is adopted to maintain the state in which the mounting plate is engaged with the steering wheel when the airbag is deployed. Such a snap-fit structure increases production cost by using a large number of parts and deteriorates the assemblability, so that the separation and coupling process between the mounting plate and the steering wheel can not be smoothly performed. Therefore, there is a need to improve this.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 2001-0005252 (published on January 15, 2001, entitled "Vibration Control Apparatus and Method for Vehicle Steering Wheel").

SUMMARY OF THE INVENTION It is an object of the present invention to provide an airbag device for a driver's seat, which can reduce the number of parts and improve assembling performance, thereby facilitating engagement and disengagement.

An airbag device for a driver's seat according to the present invention comprises: a housing part mounted with an airbag module and moved rearward by an external force to induce a horn operation; A holder portion formed in the housing portion; A clip portion detachably attached to the holder portion; And a steering wheel part mounted on the housing part to sense a horn operation, to be able to perform a steering operation, and to be attached to the clip part and maintain a state of engagement with the housing part.

Wherein the housing portion comprises: a bottom plate portion on which the airbag module is seated; A storage wall portion extending from an edge of the bottom plate portion to an upper side and storing the airbag module; A horn pressing portion formed on a bottom surface of the bottom plate portion and making contact with the steering wheel portion to perform a horn operation; A boss portion protruding from a bottom surface of the bottom plate portion and passing through the steering wheel portion; And a restoration part disposed between the bottom plate part and the steering wheel part and elastically supporting the bottom plate part.

The holder portion being protruded from a bottom surface of the bottom plate portion and having a latching hole portion for securing the clip portion; At least one holder cover portion extending from the holder engagement portion and restricting forward and backward flow of the clip portion; And a holder guide portion extending from the holder cover portion and connected to the bottom plate portion to restrict lateral movement of the clip portion.

Wherein the clip portion includes a clip rod portion slidably inserted between the holder cover portion and the holder guide portion; And a clip elastic portion coupled to the clip rod portion and inserted into the latch hole portion and having a self-elasticity.

And the clip elastic portion is injection-molded into the clip rod portion.

The clip portion further includes a clip protrusion extending from an end of the clip bar portion and exposed to the outside of the holder cover portion.

Wherein the clip elastic portion includes: an elastic insertion portion coupled to the clip rod portion; An elastic retaining portion extending from the elastic insertion portion and retaining an elastic force; An elastic support portion extending from the elastic retaining portion and contacting the holder retaining portion; And an elastic latching part extending from the elastic supporting part and inserted and fixed in the latching hole part.

And the elastic insertion portion is disposed so as to have two or more lines in the clip rod portion.

And the elastic insertion portion has an angular shape.

Wherein the steering wheel portion is formed with a boss hole portion through which the boss portion penetrates, and on which the restoration portion is seated; A horn sensing part formed on the wheel plate part and detecting whether the horn pressing part is in contact with the horn sensing part; And a wheel hook portion mounted on the wheel plate portion and engaged with the clip portion.

The steering wheel part is formed on the wheel plate part, and the wheel removing hole part exposes the clip part to the outside so that the clip part can be moved.

The airbag device for a driver's seat according to the present invention can improve the assemblability between the housing part and the steering wheel part by attaching a steering wheel part to a clip part detachably attached to the housing part.

In the airbag device for a driver's seat according to the present invention, the clip portion can be inserted or removed in a sliding manner in the holder portion.

In the airbag device for a driver's seat according to the present invention, the wheel hook portion of the steering wheel portion is engaged with the clip portion slidably inserted into the holder portion, so that the coupling relation with the housing portion can be maintained.

1 is a view schematically showing an airbag device for a driver's seat according to an embodiment of the present invention.
2 is a sectional view taken along the line AA in Fig.
3 is a view schematically showing a housing part in an airbag device for a driver's seat according to an embodiment of the present invention.
4 is a view schematically showing a clip portion in an airbag device for a driver's seat according to an embodiment of the present invention.
5 is a view schematically showing a state in which a clip is mounted in an airbag device for a driver's seat according to an embodiment of the present invention.
FIG. 6 is a view schematically showing a clip protrusion provided on a clip rod part in an airbag device for a driver's seat according to an embodiment of the present invention.
7 is a view schematically showing a clip elastic portion in an airbag device for a driver's seat according to an embodiment of the present invention.
8 is a view schematically showing a steering wheel portion in an airbag device for a driver's seat according to an embodiment of the present invention.
9 is a view schematically showing a coupling relationship between a wheel hook portion and a clip portion in an airbag device for a driver's seat according to an embodiment of the present invention.

Hereinafter, an embodiment of an airbag device for a driver's seat according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. Further, terms to be described below are terms defined in consideration of functions in the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a view schematically showing an airbag device for a driver's seat according to an embodiment of the present invention, and Fig. 2 is a sectional view taken on line A-A in Fig. 1 and 2, an airbag apparatus 1 for a driver seat according to an embodiment of the present invention includes a housing portion 10, a clip portion 20, a steering wheel portion 30 and a holder portion 40, .

An airbag module (100) is mounted on the housing part (10). The housing part 10 has an opened shape at one side, and the airbag module 100 is stored in the housing part 10 including the inflator and the airbag cushion deployed by the gas generated during the inflator ignition. The housing portion 10 may be moved rearward by an external force to perform a horn operation. The housing part (10) is provided with a holder part (40).

The steering wheel portion 30 is mounted on the bottom surface of the housing portion 10. A steering shaft can be mounted on the steering wheel portion 30 so that a steering operation can be performed. For example, when the driver rotates the steering wheel, the steering wheel portion 30 is rotated to rotate, and the steering shaft mounted on the steering wheel portion 30 is rotated to adjust the angle of the wheel. The steering wheel portion 30 can sense a swaying operation when the housing portion 10 is moved backward.

The clip portion 20 is detachably attached to the holder portion 40 and the steering wheel portion 30 is caught by the clip portion 20 and remains engaged with the housing portion 10.

3 is a view schematically showing a housing part in an airbag device for a driver's seat according to an embodiment of the present invention. 1 to 3, a housing part 10 according to an embodiment of the present invention includes a bottom plate part 11, a storage wall part 12, a horn pressing part 13, a boss part 14, And a restoration unit 15.

The airbag module (100) is seated on the bottom plate portion (11). A mounting hole 111, which is a space for installing the inflator of the airbag module 100, may be formed at the center of the bottom plate 11.

The storage wall portion (12) extends in the upper side direction from the edge of the bottom plate portion (11). The airbag module 100 can be protected by being surrounded by the storage wall portion 12. [ A cut-out cover plate is formed on the upper side of the airbag module 100, and can be cut when the airbag cushion is deployed to protect the driver.

The horn pressing portion (13) is formed on the back surface of the bottom plate portion (11). The horn pressing portion 13 can be uniformly distributed on the edge of the bottom plate portion 11. For example, a pair of horn pressing portions 13 may be disposed apart from the edge of the bottom plate portion 11. When the driver presses the housing portion 10, the bottom plate portion 11 is moved to the steering wheel portion 30. When the steering wheel portion 30 senses the horn pressing portion 13, .

The boss portion 14 protrudes from the bottom surface of the bottom plate portion 11 and penetrates the steering wheel portion 30. For example, the boss portion 14 is disposed at a corner point of each of the bottom plate portions 11, and can guide the assembling position through the steering wheel portion 30.

The restoration part 15 is disposed between the bottom plate part 11 and the steering wheel part 30 to elastically support the bottom plate part 11. [ For example, the restoring portion 15 has a coil spring shape wound around the boss portion 14, and can return the housing portion 10 from which the external force has been removed to the original position.

The holder portion 40 is formed on the bottom plate portion 11 and the clip portion 20 is kept mounted on the holder portion 40. [ For example, the holder portion 40 is formed integrally with the bottom plate portion 11, and the clip portion 20 can be mounted on the holder portion 40 while being slidably moved, or can be detached from the holder portion 40.

The holder 40 according to an embodiment of the present invention includes a holder engagement portion 41, a holder cover portion 42, and a holder guide portion 43.

The holder engaging portion 41 protrudes from the back surface of the bottom plate portion 11 and a latching hole portion 169 is formed so that the clip portion 20 is engaged. For example, the pair of holder engaging portions 41 may be respectively disposed on both sides of the mounting hole portion 111 and may have a length corresponding to the length of the clip portion 20.

The holder cover portion (42) extends from the holder engagement portion (41) and limits the forward and backward flow of the clip portion (20). The holder catching portion 41 may protrude rearward from the back surface of the bottom plate portion 11 and the holder cover portion 42 may extend laterally from the end of the holder catching portion 41. [ One or more holder cover portions 42 may be spaced equidistantly depending on the length of the holder catching portion 41.

The holder guide portion 43 extends from the holder cover portion 42 and is connected to the bottom plate portion 11 to limit lateral movement of the clip portion 20. For example, the holder guide portion 43 extending from the end of the holder cover portion 42 may be integrally formed with the bottom plate portion 11. In addition, the holder 40 itself may be formed integrally with the bottom plate 11 during the manufacturing of the housing part 10.

FIG. 4 is a view schematically showing a clip portion in an airbag device for a driver's seat according to an embodiment of the present invention, FIG. 5 is a view schematically showing a state in which a clip is mounted in an airbag device for a driver's seat according to an embodiment of the present invention And FIG. 6 is a view schematically showing a clip protrusion provided on the clip rod in the airbag device for a driver's seat according to an embodiment of the present invention. Referring to FIGS. 1 to 6, the clip portion 20 according to an embodiment of the present invention includes a clip rod portion 21 and a clip elastic portion 22.

The clip rod portion 21 is slidably inserted between the holder cover portion 42 and the holder guide portion 43. For example, the clip rod portion 21 is made of a non-metallic material and can suppress noise generation when it is in contact with the steering wheel portion 30 made of a metallic material. The clip rod portion 21 has a rectangular cross section and can be in close contact with the inner side of the holder cover portion 42 and the holder guide portion 43.

The clip elastic portion 22 is engaged with the clip rod portion 21 and inserted into the engagement hole portion 169 to fix the position of the clip rod portion 21. [ The clip elastic portion 22 is formed to have a self-elasticity to guide the movement of the clip rod portion 21 when the steering wheel portion 30 is mounted.

The clip bar portion 21 contacting the steering wheel portion 30 includes a resin material and the clip elastic portion 22 made of a metal can be insert injection molded with the clip bar portion 21. [

The clip portion 20 according to an embodiment of the present invention may further include a clip protrusion 23. [ The clip protrusion 23 extends from the end of the clip rod portion 21 and is exposed to the outside of the cover range of the holder cover portion 42. [ In one example, the clip bar portion 21 has a length such that it is located within the cover range of one or more holder cover portions 42, and the clip protrusion 23 can extend from the end of the clip bar portion 21 and be exposed to the outside . As a result, the operator can press the clip protruding portion 23 from the outside to slide the clip rod portion 21. [

7 is a view schematically showing a clip elastic portion in an airbag device for a driver's seat according to an embodiment of the present invention. 1 to 7, a clip elastic part 22 according to an embodiment of the present invention includes an elastic insertion part 221, an elastic holding part 222, an elastic supporting part 223, (224).

The elastic insertion portion 221 is engaged with the clip rod portion 21. For example, the elastic insertion portion 221 can be insert injection-molded into the clip rod portion 21. [ The elastic insertion portion 221 may be formed to have a length corresponding to the clip rod portion 21. [

The elastic retaining portion 222 extends from the elastic insertion portion 221 and holds an elastic force. For example, the elastic retaining portion 222 may have an inclined or curved shape from the holder guide portion 43 toward the holder retaining portion 41, and an elastic restoring force may be generated when the elastic retaining portion 222 is self-deformed.

The elastic support portion 223 extends from the elastic retaining portion 222 and contacts the holder engagement portion 41. [ For example, the elastic support portion 223 can maintain the contact state along the length of the holder engagement portion 41 to support the clip rod portion 21.

The elastic latching portion 224 extends from the elastic support portion 223 and is inserted into the latching hole portion 169 and is engaged and fixed. For example, the elastic latching portion 224 may be bent at the end of the elastic support portion 223 and inserted into the latching hole portion 169, thereby fixing the clip portion 20 to the holder portion 40.

The elastic insertion portions 221 are arranged in a zigzag manner. For example, the elastic insertion portion 221 embedded in the clip rod portion 21 is arranged so as to have two or more lines in the vertical direction or the horizontal direction of the clip rod portion 21 to increase the binding force with the clip rod portion 21 Thereby increasing its own rigidity and preventing damage due to the load (see Fig. 7A). In addition, the cylindrical elastic insertion portion 221 is processed so as to have an angular shape so that the coupling force with the clip rod portion 21 can be increased and the twist can be suppressed (see FIG. 7B).

FIG. 8 is a view schematically showing a steering wheel portion in an airbag device for a driver's seat according to an embodiment of the present invention. FIG. 9 is a side view showing a coupling relation between a wheel hook portion and a clip portion in an airbag device for a driver's seat according to an embodiment of the present invention. Fig. 1 to 9, the steering wheel unit 30 according to an embodiment of the present invention includes a wheel plate 31, a horn sensing unit 32, and a wheel hook unit 33.

A boss hole portion 311 is formed in the wheel plate portion 31 so as to allow the boss portion 14 to pass therethrough. When the boss portion 14 is inserted into the plurality of boss hole portions 311, the assembled position of the housing portion 10 can be guided as designed. Meanwhile, the restoration part 15 surrounding the boss part 14 may be seated on the wheel plate part 31 to support the bottom plate part 11.

The horn sensing portion 32 is formed on the wheel plate portion 31 and detects whether or not the horn pressing portion 13 is contacted. When the horn pressure portion 13 comes into contact with the horn detection portion 32, a warning sound is generated.

The wheel hook portion 33 is mounted on the wheel plate portion 31 and is engaged with the clip portion 20. For example, the wheel hook portion 33 has a shape in which the end portion of the rod has an inclined shape, and can protrude laterally and can be engaged with the clip portion 20. When the wheel hook portion 33 is mounted on the clip portion 20, the engagement state between the housing portion 10 and the steering wheel portion 30 can be maintained even when the air bag module 100 is deployed.

The steering wheel portion 30 according to an embodiment of the present invention may further include a wheel removal hole portion 34. [ The wheel removal hole portion 34 is formed in the wheel plate portion 31 and exposes a part of the clip portion 20 to the outside so that the clip portion 20 can be moved. The clip rod portion 21 is covered by the holder portion 40 but can be exposed to the outside by the wheel removal hole portion 34 and the clip rod portion 21 is slid through the wheel removal hole portion 34 Can be moved.

The operation of the driver's seat airbag apparatus according to an embodiment of the present invention will now be described.

The boss 14 protrudes to the rear of the bottom plate 11 of the housing part 10 while the airbag module 100 is mounted on the housing part 10, Lt; / RTI >

On the other hand, a pair of holder portions 40 are formed on the back surface of the bottom plate portion 11, and the clip portion 20 is held by the latching hole portion 169 while being inserted into the holder portion 40.

When the boss portion 140 is inserted into the steering wheel portion 30 disposed on the rear side on the basis of the driver's seat in the above-described state, the boss portion 140 passes through the boss hole portion 311 to guide the assembled position. At this time, the wheel hook portion 33 is mounted on the clip portion 20, and the coupled state between the housing portion 10 and the steering wheel portion 30 is maintained.

The clip portion 20 includes a clip bar portion 21 on which the wheel hook portion 33 is mounted and a clip elastic portion 22 coupled to the clip bar portion 21 and mounted on the holder portion 40. The inclined end portion of the wheel hook portion 33 is moved forward while pushing the clip rod portion 21 toward the holder engaging portion 41 as the housing portion 10 and the steering wheel portion 30 approach each other.

When the wheel hook portion 33 reaches the coupling point, the clip rod portion 21 is returned to the original position by the restoring force of the clip elastic portion 22, so that the wheel hook portion 33 is caught by the clip rod portion 21 . When the clip portion 20 is slid and removed from the holder portion 40, the connection between the steering wheel portion 30 and the housing portion 10 disappears and the housing portion 10 is removed from the steering wheel portion 30. [ Can be separated.

The driver's seat airbag apparatus 1 according to an embodiment of the present invention includes a clip portion 20 detachably attached to the housing portion 10 and a steering wheel portion 30 mounted thereon, The assemblability can be improved.

The airbag apparatus 1 for a driver's seat according to an embodiment of the present invention can insert or detach the clip portion 20 into the holder portion 40 in a sliding manner.

The driver's seat airbag apparatus 1 according to an embodiment of the present invention is configured such that the wheel hook portion 33 of the steering wheel portion 30 is engaged with the clip portion 20 to be slidably inserted into the holder portion 40, 10) can be maintained.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the true scope of protection of the present invention should be defined by the following claims.

10: housing part 11: bottom plate part
12: storage wall portion 13: horn pressing portion
14: Boss part 15: Restoration part
20: clip portion 21: clip bar portion
22: clip elastic portion 23: clip protrusion
30: Steering wheel part 31: Wheel plate part
32: horn sensing part 33: wheel hook part
34: wheel detaching hole part 40: holder part
41: holder holding portion 42: holder holder portion
43: holder guide portion 221: elastic insertion portion
222: elastic retaining portion 223: elastic supporting portion
224:

Claims (11)

A housing part mounted with an airbag module and moved backward by an external force to induce a horn operation;
A holder portion formed in the housing portion;
A clip portion detachably attached to the holder portion; And
And a steering wheel part mounted on the housing part to sense a horn operation, to be able to perform a steering operation, and to be attached to the clip part and maintain the engaged state with the housing part.
2. The apparatus of claim 1, wherein the housing portion
A bottom plate portion on which the airbag module is seated;
A storage wall portion extending from an edge of the bottom plate portion to an upper side and storing the airbag module;
A horn pressing portion formed on a bottom surface of the bottom plate portion and making contact with the steering wheel portion to perform a horn operation;
A boss portion protruding from a bottom surface of the bottom plate portion and passing through the steering wheel portion; And
And a restoring portion disposed between the bottom plate portion and the steering wheel portion and elastically supporting the bottom plate portion.
3. The apparatus of claim 2, wherein the holder portion
A holder engaging portion protruding from a bottom surface of the bottom plate portion and having a latching hole portion for securing the clip portion;
At least one holder cover portion extending from the holder engagement portion and restricting forward and backward flow of the clip portion; And
And a holder guide portion extending from the holder cover portion and connected to the bottom plate portion to restrict lateral movement of the clip portion.
The apparatus of claim 3, wherein the clip portion
A clip bar portion slidably inserted between the holder cover portion and the holder guide portion; And
And a clip elastic portion coupled to the clip rod portion and inserted into the latch hole portion and having a self-elasticity.
5. The method of claim 4,
And the clip elastic portion is insert-molded into the clip rod portion.
5. The apparatus of claim 4, wherein the clip portion
Further comprising a clip protrusion extending from an end of the clip rod portion and exposed to the outside of the holder cover portion.
5. The connector according to claim 4, wherein the clip elastic portion
An elastic insert coupled to the clip rod;
An elastic retaining portion extending from the elastic insertion portion and retaining an elastic force;
An elastic support portion extending from the elastic retaining portion and contacting the holder retaining portion; And
And an elastic locking part extending from the elastic supporting part and inserted and fixed in the locking hole part.
8. The method of claim 7,
Wherein the elastic insertion portion is arranged to have two or more lines in the clip rod portion.
8. The method of claim 7,
Wherein the elastic insertion portion has an angular shape.
The steering apparatus according to claim 2, wherein the steering wheel portion
A wheel plate portion having a boss hole portion through which the boss portion is inserted and on which the restoration portion is seated;
A horn sensing part formed on the wheel plate part and detecting whether the horn pressing part is in contact with the horn sensing part; And
And a wheel hook portion mounted on the wheel plate portion and engaged with the clip portion.
11. The steering apparatus according to claim 10, wherein the steering wheel portion
Further comprising a wheel detachment hole formed in the wheel plate portion and exposing the clip portion to the outside so that the clip portion can be moved.

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