KR102416668B1 - Driver airbag apparatus of vehicle - Google Patents

Abstract

A driver's seat airbag device for a vehicle, comprising: a driver's seat airbag mounted inside a steering wheel in a folded state; and the driver's seat airbag includes a tether member for limiting the inflation thickness of the driver's seat airbag, and a diffuser installed on the tether member and controlling the movement passage area of the gas supplied to the driver's seat airbag to control the amount and direction of movement of the gas. By providing a configuration that includes, the diffuser can be installed on the tether member for limiting the deployment thickness of the driver's seat airbag to limit the rearward movement of gas and to control the flow of gas.

Description

Driver's seat airbag device for automobiles {DRIVER AIRBAG APPARATUS OF VEHICLE}

The present invention relates to a driver's seat airbag device for an automobile, and more particularly, to a driver's seat airbag system for protecting a driver by inflating and deploying an airbag cushion when a vehicle crash occurs.

In general, an airbag module of a vehicle is a safety device for protecting occupants by rapidly inflating the airbag by injecting gas into the airbag according to a signal of an impact sensor during a vehicle collision.

Such an airbag device is installed on a steering wheel, a dashboard, a seat, a side wall, etc. provided in a vehicle, and is inflated toward the front or side of the occupant when the vehicle collides to protect the occupant.

That is, in automobiles, a driver air-bag (DAB) and passenger air-bag (PAB) that protect the front passenger in a frontal collision, and a side air bag (Side Air) that protects the passenger's side in a side impact -Bag, SAB), a curtain air bag (Curtain Air-Bag, CAB), a knee air bag (Near Air-Bag) for protecting a passenger's knee, etc. may be provided.

Among them, the driver's seat airbag is concentrically mounted on the steering wheel so that the airbag is configured to rapidly inflate in response to the rapid deceleration of the vehicle.

For example, the present applicant has disclosed a configuration of a driver's seat airbag of a vehicle in a number of patent documents 1 and 2, such as the following, and has applied for a patent.

The conventional initial driver's seat airbag inflates in a substantially ball shape when the airbag is inflated, so that the lower portion of the airbag does not sufficiently cover the lower portion of the steering wheel, and thus there is a problem in that the driver's chest collides with the steering wheel and is injured.

To this end, conventionally, a configuration in which a tether member is additionally installed inside the airbag to cover the expanded thickness of the central portion of the airbag to sufficiently cover the lower portion of the steering wheel has been proposed.

Depending on the conditions of the driver seated in the driver's seat, such as various body sizes, weights, seating positions, or collision scenarios of the vehicle, the distance between the inflated airbag and the driver or the driver's behavior may vary, in which case the airbag may provide the desired protection. can't perform Accordingly, there is a need for research on an airbag that can properly respond to various driver conditions and crash modes.

In particular, in recent years, in order to minimize the installation space of the airbag cushion, a compressed folding type of compressing and folding the airbag cushion is applied.

The pressure folding method can minimize the volume by compressing the airbag cushion to have a certain direction.

In the airbag cushion to which the compression folding method is applied, a diffuser is installed to control the gas supply direction and speed in order to effectively control the deployment speed and deployment shape when the airbag cushion is inflated and deployed.

Korean Patent Publication No. 10-2019-0070657 (published on June 21, 2019) Republic of Korea Patent Registration No. 10-1781380 (Announced on September 25, 2017)

On the other hand, the diffuser applied to the driver's seat airbag device of a vehicle according to the prior art is attached to the rear panel by a sewing method, and is divided into an 'X' shape, a 'Y' shape, and an 'I' shape depending on the shape of the diffuser, but basically The driver's airbag has a function of restricting gas flow.

However, in the driver's seat airbag device according to the prior art, the structure of the airbag cushion becomes complicated as the diffuser is sewn and attached to the rear panel. There was a problem that the work time was unnecessarily long, and workability was lowered.

In particular, when the airbag cushion is folded by the above-described compression folding method, it is difficult to effectively control the flow of gas because the airbag cushion, the tether, and the diffuser are compressed and folded irregularly.

In addition, the driver's seat airbag device according to the prior art applies a plurality of heat shield seats to prevent damage to the airbag cushion and the diffuser due to the high-temperature and high-pressure gas supplied from the inflator, so that the structure of the airbag cushion becomes complicated. , there was a problem in that human, material, and time costs required for manufacturing work increased.

Therefore, there is a demand for the development of a technology capable of simplifying the structures of the tether, the diffuser, and the heat shield seat installed in the driver's seat airbag.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems, in which the airbag cushion is inflated and deployed toward the front of the driver during a car crash to protect the head and abdomen, that is, the upper body as a whole, centering on the driver's chest. To provide a driver's seat airbag device for a vehicle.

Another object of the present invention is to integrate a tether defining the deployment shape of the front panel and the rear panel and a diffuser for limiting the flow of gas, and by applying and applying a diffuser of a simple structure to control the flow of gas. To provide an airbag device.

Another object of the present invention is to provide an airbag device for a driver's seat of a vehicle capable of effectively controlling an initial deployment shape and direction when an airbag cushion that is folded in a compression folding method is inflated and deployed.

In order to achieve the above object, the driver's seat airbag device for a vehicle according to the present invention is connected to a driver's seat airbag mounted inside a steering wheel in a folded state and the driver's seat airbag, so that the driver's seat airbag is connected to the steering wheel and the driver when the vehicle collides. an inflator for supplying gas to inflate between It characterized in that it comprises a diffuser for controlling the movement amount and movement direction of the gas.

As described above, according to the driver's seat airbag device for a vehicle according to the present invention, the diffuser and the tether member installed inside the driver's seat airbag are integrally installed to limit the rear movement of gas and to control the flow of gas. lose

And according to the present invention, the diffuser and the front panel are sewn between the tether members, and in a state where the diffuser and the front panel are spaced apart from each other, the front panel and the rear panel with the sewn edges are turned over to their original positions. As a result, the diffuser and the front panel The effect that the front panel and the rear panel can be easily turned over is obtained through the spaced apart space of the

Accordingly, according to the present invention, it is possible to improve the workability by reducing the difficulty of the process of turning the edge-sewn front panel and the rear panel to their original positions is obtained.

In addition, according to the present invention, it is possible to simplify the installation structure by integrating the diffuser and the tether member, minimize the working time during manufacturing, and improve workability to reduce the manufacturing cost is obtained.

In particular, according to the present invention, it is possible to effectively adjust the deployment shape of the drivable airbag by applying a cone-shaped diffuser and controlling the movement amount and movement direction of the gas whose backward movement is restricted by the diffuser.

In addition, according to the present invention, there is an effect that the amount and direction of movement of gas can be controlled by changing the shape of the diffuser, such as the position of the vertex of the diffuser, the size of the central angle, and the shape of the body and each protrusion.

Accordingly, according to the present invention, it is possible to safely protect the driver by minimizing the impact applied to the driver's chest when the driver's seat airbag is inflated and deployed.

1 is a perspective view of a driver's seat airbag device of a vehicle according to the prior art;
2 is a cross-sectional view taken along line A-A' shown in FIG. 1;
3 is an exploded perspective view of the driver's seat airbag shown in FIG. 1;
4 is a perspective view showing an inflated state of the driver's seat airbag of the driver's seat airbag device for a vehicle according to a preferred embodiment of the present invention;
5 is a cross-sectional view taken along the line B-B' shown in FIG. 4;
6 is an exploded view of the driver's seat airbag and first and second tether members shown in FIG. 4;
7 is an enlarged perspective view of the diffuser shown in FIG. 6, and FIG. 8 is an exploded view of the diffuser shown in FIG.
9 is an exploded view of a diffuser applied to an airbag device for a driver's seat of a vehicle according to another embodiment of the present invention;
10 is a perspective view of the diffuser shown in FIG. 9;
11 and 12 are perspective views of a diffuser applied to an airbag device for a driver's seat of a vehicle according to another embodiment of the present invention, respectively.

Hereinafter, a driver's seat airbag device for a vehicle according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the drawings, the direction toward the steering wheel 11 with the driver as the center is referred to as 'front (F)', and the direction toward the driver's seat is referred to as 'rear (B)'.

And terms indicating a direction such as 'left (L)', 'right (R)', 'up (U)' and 'down (D)' refer to each direction based on the above-mentioned front and rear. defined as

First, before describing the configuration of the driver's seat airbag device for a vehicle according to a preferred embodiment of the present invention, a configuration of the driver's seat airbag device according to the prior art will be schematically described with reference to FIGS. 1 to 3 .

1 is a perspective view of a driver's seat airbag device of a vehicle according to the prior art, FIG. 2 is a cross-sectional view taken along line A-A' shown in FIG. 1, and FIG. 3 is an exploded perspective view of the driver's seat airbag shown in FIG.

As shown in FIGS. 1 and 2, the driver's seat airbag device 1 according to the prior art restricts the inflation thickness of the driver's seat airbag between the front panel 2 and the rear panel 3 constituting the driver's seat airbag. A tether member 4 is installed.

In general, a plurality of tether members 4 are provided, for example, four as shown in FIG. 1 , and a diffuser 5 for controlling the supply direction of the gas supplied from the inflator 6 on the rear surface of the front panel 2 . is installed

The tether member 4 is constituted by connecting a front tether connected to the front panel 2 and a passenger tether connected to the rear panel 3 to each other in an approximately central portion of the driver's seat airbag by sewing.

The diffuser 5 is formed in an approximately 'X' shape to avoid interference with the four tether members 4 , and is fixed to the rear surface of the front panel 2 in a sewing manner.

As described above, the diffuser 5 applied to the driver's seat airbag device 1 of a vehicle according to the prior art is manufactured using a separate member, and must be sewn to avoid interference with the tether member 4 .

In particular, according to the prior art, as shown in FIG. 3 , the front panel 2 and the front side tether 4 and the heat shield 6 and the diffuser 5 are sewn, and the rear panel 3 and the passenger side are sewn. After sewing the tether (4), the front side tether (4) and the passenger side tether (4) are sewn, and then the front panel (2) and the rear panel (3) are in a state in which the front and rear panels (2, 3) are turned upside down The edges are sewn in the , and the driver's seat airbag 1 is manufactured by turning it over to its original position.

However, in a state where the front tether 4 and the passenger side tether 4 are sewn, the front panel 2 and the rear panel 3 are turned over and the edges of the front and panel are sewn, and then the process of turning it back to its original position is gas The work process is complicated and difficult as it has to be performed through a narrow space between the diffuser and the front panel in a state in which the diffuser 4 through which it passes is installed.

Accordingly, the driver's seat airbag device according to the prior art has problems in that the manufacturing process and structure are complicated, the difficulty of the manufacturing process is high, so it is difficult for unskilled workers to perform, and the work time is unnecessarily delayed, which increases human, material, and time costs. there was.

On the other hand, in the driver's seat airbag device 1 of a vehicle according to the prior art, gas is supplied from the inflator 12 to the front panel 2 for damage to the driver's seat airbag due to the high-temperature gas supplied from the inflator 12. It further includes a plurality of heat shield sheets (6) installed around the ball.

As described above, in the driver's seat airbag device 1 of a vehicle according to the prior art, as the process of installing a plurality of heat shield sheets 6 on the front panel 2 is added, workability is reduced, and the There was a problem in that human, material, and time costs increased.

In order to solve this problem, the present invention integrates a tether member that defines the deployment shape of the airbag, a diffuser that controls the gas supply direction, and a heat shield sheet that prevents damage due to high-temperature gas to simplify the structure, It improves workability during manufacturing operation and reduces manufacturing cost.

In addition, the present invention forms the diffuser in a substantially conical shape, and effectively controls the gas flow by adjusting the surface area ratio of the diffuser.

Next, a configuration of a driver's seat airbag device for a vehicle according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 4 to 6 .

4 is a perspective view showing an inflated state of the driver's seat airbag of the driver's airbag device of a vehicle according to a preferred embodiment of the present invention, FIG. 5 is a cross-sectional view taken along the line B-B' shown in FIG. It is an exploded view of the illustrated driver's seat airbag and first and second tether members.

Hereinafter, in order to minimize the volume of the airbag 20 installed inside the housing 13 of the steering wheel 11 , the configuration of the airbag folded in a compression folding method will be described.

Of course, it should be noted that the present invention is not necessarily limited thereto, and may be applied to an airbag installed by folding or rolling in various ways.

As shown in FIGS. 4 and 5 , the driver's seat airbag device 10 according to a preferred embodiment of the present invention is mounted in a steering wheel 11 provided in the driver's seat of a vehicle.

When the airbag 20 is inflated, the front panel 21 facing the front of the vehicle and the rear panel 22 facing the front panel 21 and facing the driver are sewn or one piece woven. It may be formed in a bag shape by

A supply hole 23 to which gas is supplied from the inflator 12 is formed in the front panel 21 , and one or more heat seals are formed around the supply hole 23 to withstand high temperature and high pressure gas generated from the inflator 12 . Sheets (not shown) may be connected.

In addition, a vent hole (not shown) for discharging gas in the airbag 20 to the outside after the airbag 20 is deployed may be formed in the front panel 21 .

A tether member 25 may be installed between the front panel 21 and the rear panel 22 , which is disposed substantially adjacent to the center of the airbag 20 to limit the inflation thickness of the airbag 20 .

The tether member 25 prevents the central portion of the airbag 20 from protruding toward the driver by the gas supplied from the inflator 12 to the front panel 21 and the rear panel 22, and the steering wheel 11 It functions to limit the deployment shape of the airbag 20 so as to completely cover the rim portion 14 of the airbag 20 .

To this end, the length of the upper end of the tether member 25 along the front-rear direction of the vehicle may be formed to be longer than the length of the lower end of the tether member 25 so that the upper portion of the airbag 20 expands thicker than the lower portion.

To this end, a plurality of tether members 25 are provided, for example, two to four, and the front and rear ends of each tether member 25 may be coupled to the front panel 21 and the rear panel 22 in a sewing manner, respectively. have.

Here, each tether member 25 is manufactured in a state in which it is divided into two, and the tether member 25 divided into two is connected by a sewing method inside the airbag 20 .

Meanwhile, a diffuser 30 for controlling a supply direction of the gas supplied through the supply hole 23 is installed between the front panel 21 and the rear panel 22 .

The diffuser 30 may be manufactured in the form of a substantially circular membrane using the same material or a similar material as that of the airbag 20 , and may be installed on the tether member 25 .

For example, as shown in FIGS. 4 to 6 , when four tether members 25 are installed on the upper and lower sides and on both sides around the supply hole 23 , the upper and lower ends of the diffuser 30 , both sides The ends may be fixed to each of the four tether members 25 , respectively.

Here, the diffuser 30 may be fixed to each tether member 25 by a sewing method.

In this embodiment, the diffuser 30 is sewn and fixed together with each tether member 25 during a sewing operation for connecting each tether member 25 divided into two parts.

As described above, according to the present invention, the diffuser may be arranged in an approximately middle portion of the tether member by sewing the diffuser together during the sewing operation for connecting the tether members divided into two during manufacturing of the general driver's seat airbag.

Accordingly, in the present invention, there is no need to additionally fix the diffuser to the front panel of the driver's seat airbag, thereby simplifying the structure of the driver's seat airbag device and improving workability.

On the other hand, the gas supplied from the inflator 12 corresponds to an approximately 'X' shape based on the center point of the diffuser 30 through the space between each tether member 25 in a state where the rear movement is restricted by the diffuser 30 . As much as possible, it may be supplied along a diagonal direction.

That is, in this embodiment, the diffuser 30 switches the movement direction of the gas to each diagonal direction based on the central point of the diffuser 30, and adjusts the shape or installation angle of the diffuser 30 to adjust the front panel 21 ) and the rear panel 22 , by controlling the speed and amount of gas supplied, the deployment speed and deployment shape of the airbag 20 can be adjusted.

For example, the diffuser 30 may be formed to have a cross-sectional area that is slightly larger than the cross-sectional area of the space between each tether member 30 or the same as the cross-sectional area of the space.

If the diffuser 30 is formed with a cross-sectional area smaller than the cross-sectional area of the space between each tether member 25, each tether member 25 cannot be completely expanded due to the diffuser 30 fixed in the approximately middle part. Accordingly, the deployment shape of the airbag 20 may be irregular or incompletely deployed.

On the other hand, when the diffuser 30 is formed with a cross-sectional area slightly larger than the cross-sectional area of the space between each tether member 25 , when the airbag 20 is inflated, the central portion of the airbag 20 is more gas than the upper and lower ends and both ends sewn with the tether members 25 . When viewed from the side, it expands in a convex arc shape toward the rear.

Accordingly, the gas supplied from the inflator 12 through the supply hole 23 is limited in backward movement by the diffuser 30 and is refracted forward based on the central point of the diffuser 30 and is supplied in a diagonal direction. .

And when the diffuser is formed with the same cross-sectional area as the cross-sectional area of the space between each tether member 25, the upper and lower ends and both ends sewn with the tether member 25 are sewn when the airbag 20 is inflated, so that it is approximately flat. is inflated

Accordingly, the gas supplied from the inflator 12 through the supply hole 23 is limited in backward movement by the diffuser 30 and is refracted forward based on the central point of the diffuser 30 and is supplied in a diagonal direction. .

In addition, when the airbag 20 is inflated, the diffuser 30 may be arranged to be deployed from the rear side than the rear end of the housing 13 in which the airbag 20 is accommodated, as seen in FIG. 5 .

That is, the distance L1 between the diffuser 30 and the front end of the housing 13 is preferably set to be greater than the distance L2 between the front end and the rear end of the housing 13 .

In addition, the diffuser 30 may be arranged to be deployed from the front side rather than the middle portion of the tether member 25 so as to obtain an effect of preventing the backward movement of the gas.

That is, the distance L3 between the diffuser 30 and the front end of the airbag 20 is preferably set to be smaller than 1/2 of the tether length L4.

As described above, the present invention limits the rear movement of gas by using a diffuser integrated with the tether member when the driver's seat airbag is inflated and deployed, and supplies the gas in the forward and diagonal directions, thereby minimizing the impact on the driver's chest. can do.

In addition, the present invention can reduce the manufacturing cost by integrating the diffuser and the tether member to simplify the installation structure, minimize the working time during manufacturing, and improve workability.

The tether member 25 may be divided into two as shown in FIG. 6 .

Hereinafter, the tether sewn with the front panel 21 among the tether members 25 divided into two is referred to as 'front tether 251', and the tether sewn with the rear panel 22 is referred to as 'passenger side tether 252'. separated by '.

Here, one or more heat shield sheets 40 are respectively disposed on the front side and rear side of the front side tether 251 , and the passenger side tether 252 may be provided as a pair in which the central portion 253 overlaps each other.

The front side tether 251 and the passenger side tether 252 extend outward from the central portion 253 and the central portion 253 sewn to the front panel 21 and the rear panel 22, respectively, as shown in FIG. 6 , respectively. and may include a plurality of extension parts 254 connected to the diffuser 30 in a sewing manner.

For example, each of the central portions 253 may be formed in a substantially circular shape, and two to four of each of the extended portions 254 may be provided outside the central portion 253 .

In this embodiment, the configuration is described in which the tether member 25 has a front side tether 251 and a passenger side tether 252 each having four extension parts 254, but the present invention is not necessarily limited thereto. It should be noted that it may be changed to provide two, three, or five or more extension parts 254 .

Next, the configuration of the diffuser will be described in detail with reference to FIGS. 7 and 8 .

7 is an enlarged perspective view of the diffuser shown in FIG. 6 , and FIG. 8 is an exploded view of the diffuser shown in FIG. 7 .

As shown in FIGS. 7 and 8 , the diffuser 30 may be formed in a conical shape or a cone shape (hereinafter referred to as a 'conical shape') in which a central portion protrudes backward.

To this end, the diffuser 30 has a body portion 31 having a substantially circular cross section in the central portion, and a plurality of protrusions protruding outward from the body portion 31 and connected to the tether member 25 in a sewing manner, respectively; For example, the first to fourth protrusions 32 to 35 may be included.

Hereinafter, the protrusion provided at the upper end of the body part 31 is referred to as a first protrusion 32 , and the rest are referred to as second to fourth protrusions 33 to 35 in a clockwise direction when viewed in FIG. 8 .

The diffuser 30 may be formed in a substantially conical shape by cutting a portion of the body portion 31 provided in a substantially disk shape, and connecting both sides of the cut out with each other.

To this end, the cut-out area 36 having a substantially sectoral shape may be provided in the body part 31 .

In this embodiment, the cut-out area 36 may be formed at a central angle α set to a preset angle with respect to the center O of the body 31 .

For example, the cut-out region 36 may be formed to have a central angle of about 1° to 60° from the center O of the body part 31 .

Of course, the present invention is not necessarily limited thereto, and the shape of the cutout area 36, that is, the diffuser 30 formed in a cone shape by changing the position of the vertex P of the cutout area 36 and the size of the central angle α. By controlling the surface area of the interior, the flow of gas can be controlled.

For example, FIG. 9 is an exploded view of a diffuser applied to an airbag device for a driver's seat of a vehicle according to another embodiment of the present invention, and FIG. 10 is a perspective view of the diffuser shown in FIG. 9 .

As shown in FIGS. 9 and 10, the vertex P of the incision region 36 is one side from the center O of the body part 31, for example, it can be disposed at a position moved upward as viewed in FIG. have.

So, as the vertex P of the diffuser 30 is disposed above the center O of the body part 31, the upper surface of the diffuser 30 around the vertex P has a greater slope than the lower eccentricity. It may be formed in a conical shape.

As such, when the diffuser 30 is formed in an eccentric cone shape by moving the vertex position P upward, the gas supplied through the supply hole 23 of the front panel 21 is disposed on the upper side of the diffuser 30 . It can move more smoothly to the lower side with a relatively gentle slope. Accordingly, the amount of movement of the gas moving upward of the diffuser 30 is less than the amount of movement of the gas moving downward.

Of course, in the present invention, the gas flow can be controlled by moving the vertex P of the diffuser 30 to the upper side as well as to the lower side, the left side, or the right side based on the center O of the body part 31 .

As described above, the present invention can control the amount and direction of movement of gas by individually adjusting the movement path of the gas moving through the space between each extension provided on the tether on the front side of the tether member by adjusting the position of the vertex of the diffuser. .

Also, according to the present invention, the gas flow may be controlled by increasing or decreasing the central angle of the cut-out area provided in the diffuser to decrease or increase the surface area of the diffuser formed in a cone shape.

On the other hand, in the present invention, the diffuser 30 may be formed in a cone shape or a plate shape, and the gas flow may be controlled by changing the shape of the body part 31 and each of the protrusions 32 to 35 .

For example, FIGS. 11 and 12 are perspective views of a diffuser applied to an airbag device for a driver's seat of a vehicle according to another embodiment of the present invention, respectively.

In the driver's seat airbag device 10 of a vehicle according to another embodiment of the present invention, the diffuser 30 has the shape of the body part 31 and each of the protrusions 32 to 35 as shown in FIGS. 11 and 12 . change to control the flow of gas.

That is, each connection part 37 provided between the body part 31 and each of the protrusions 32 to 35 may have a substantially triangular cross-section, as shown in FIG. 11 .

Here, the hypotenuse of each connection part 37 may be variously changed into a straight line shape, an outwardly convex arc shape, or an inwardly concave arc shape.

In this way, the present invention can control the amount of gas movement by reducing or increasing the area of the passage through which the gas moves by forming the connecting portion provided between the body portion of the diffuser and each protrusion in a straight line, convex or concave arc shape.

On the other hand, as each of the protrusions 32 to 35 is connected to each extension 254 of the front side tether 251 and the passenger side tether 252 in a sewing manner, the present invention relates to the length of each of the protrusions 32 to 35 . It is possible to control the amount and direction of movement of gas by increasing or decreasing the area of the passage through which the gas moves by adjusting .

For example, as shown in FIG. 12 , when the length of the first protrusion 32 is increased, between the body part 31 and the first and second protrusions 32 and 33 and between the first and fourth protrusions ( 32 and 35), as the area of the gas passageway formed between them increases, the amount of gas movement increases.

On the other hand, when the length of the first protrusion 32 is shortened, the amount of gas formed between the body part 31 and the first and second protrusions 32 and 33 and between the first and fourth protrusions 32 and 35 is reduced. As the area of the movement passage decreases, the amount of movement of the gas decreases.

As described above, according to the present invention, by adjusting the length of the protrusion provided in the diffuser to adjust the gas movement path, it is possible to control the amount of gas moving through the movement path between the protrusions.

Therefore, according to the present invention, the movement direction of the gas may be controlled by adjusting the ratio of the movement amount of the gas moving through the space between each protrusion.

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

The present invention is applied to a technology for a driver's seat airbag device of a vehicle that controls the deployment shape of the driver's seat airbag by restricting the backward movement of gas by using a diffuser when the driver's seat airbag is inflated and deployed and by controlling the gas flow.

10: Driver's seat airbag device of the vehicle
11: steering wheel 12: inflator
13: housing
20: driver's seat airbag
21: front panel 22: rear panel
23: supply hole 25: tether member
251: front side tether 252: passenger side tether
253: central part 254: extended part
30: diffuser 31: body part
32 to 35: first to fourth protrusions
36: cut-out area 37: connection part
40: heat shield sheet
O: center of body part P: vertex
α: central angle

Claims (7)

The driver's seat airbag is installed in a folded state inside the steering wheel and
an inflator connected to the driver's seat airbag to supply gas so that the driver's seat airbag expands between the steering wheel and the driver in the event of a vehicle collision;
The driver's seat airbag includes a tether member for limiting an inflation thickness of the driver's seat airbag;
and a diffuser installed on the tether member and controlling a movement amount and movement direction of gas by adjusting a movement passage area of the gas supplied to the driver's seat airbag;
The diffuser is provided with an incision area cut in a fan shape,
The diffuser is formed in a cone shape by connecting both sides of the cutout area by a sewing method, is convex toward the passenger side when the driver's seat airbag is deployed, and controls the flow of gas by adjusting the internal surface area,
The airbag device for a driver's seat of a vehicle, characterized in that the gas movement amount and movement direction are controlled by adjusting any one or more of the position of the vertex and the size of the central angle of the cutout area. delete delete delete According to claim 1,
The diffuser has a body portion formed in a circular shape and
It includes a plurality of protrusions formed to protrude to the outside of the body portion,
The airbag device for a driver's seat of a vehicle, wherein the protrusion is connected to the tether member by a sewing method. 6. The method of claim 5,
A triangular connection portion is provided between the body portion and each protrusion, respectively,
The hypotenuse of the connection part is formed in a straight shape or a curved shape to control an area of a passage through which the gas moves. 6. The method of claim 5,
The airbag device for a driver's seat of a vehicle, characterized in that the length of the plurality of protrusions is adjusted to adjust the area of the passage through which the gas moves.

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