WO2020116855A1

WO2020116855A1 - Vehicular airbag device

Info

Publication number: WO2020116855A1
Application number: PCT/KR2019/016528
Authority: WO
Inventors: 유완동; 정용현; 김동영
Original assignee: 아우토리브 디벨롭먼트 아베
Priority date: 2018-12-06
Filing date: 2019-11-28
Publication date: 2020-06-11
Also published as: KR102108039B1; CN113226862A; CN113226862B

Abstract

The present invention relates to a vehicular airbag device comprising: a housing forming an exterior; a plurality of inflators for generating gas by selectively being ignited when a vehicle crashes; and an airbag cushion provided in a rolled or folded state inside the housing and having a plurality of chambers provided therein that are inflated and expanded toward the front of a passenger by receiving gas generated from each inflator when the vehicle crashes, wherein according to a seating posture of the passenger, the plurality of chambers provided in the airbag cushion are selectively inflated and expanded to compensate for a distance from the passenger to safely protect the passenger.

Description

Automotive airbag device

The present invention relates to an airbag device for a vehicle, and more particularly, to an airbag device for a vehicle that expands and expands upon collision of a vehicle to restrain and protect a passenger.

In general, a vehicle airbag device is a safety device that protects a passenger by inflating an airbag by injecting gas into the airbag according to a signal from a shock sensor when a vehicle crashes.

The airbag device is installed on a steering wheel or a dashboard, a seat, or a side wall provided in a vehicle, and is expanded toward the front or side of the occupant in the event of a vehicle collision to protect the occupant.

That is, the vehicle may be provided with a front airbag deployed in front of the driver's seat and a passenger seat, a curtain airbag and side airbag deployed at a side of the passenger to protect the passenger, and a knee airbag for protecting the knee of the passenger.

Meanwhile, in recent years, autonomous vehicles have been developed to move themselves without the driver driving the vehicle.

The autonomous vehicle uses a state-of-the-art sensor capable of recognizing surrounding objects and a high-performance graphic processing device to detect each device provided in the vehicle and the situation around the vehicle, and controls driving of each device provided in the vehicle according to the detection result. To drive.

The state-of-the-art sensor measures the distance between an object and a person like a person, detects danger, and helps to see all areas without blind spots. In addition, the graphic processing device helps the vehicle to safely drive by grasping the surrounding environment of the vehicle through several cameras and analyzing the image.

For example, a self-driving vehicle may be equipped with LiDAR equipment, sound wave equipment, 3D cameras, radar equipment, and the like.

In the autonomous vehicle configured as described above, as the driver does not need to drive, the entire seat including the driver's seat rotates freely, and the angle of the backrest is adjusted to a horizontal state by a tilting operation.

The occupant can adjust the angle of the backrest in various ways, or rotate the seat to face the occupant in the back seat and have a meeting.

Therefore, it is impossible to apply a general airbag device designed on the basis of the posture in which the occupant is seated toward the front of the autonomous vehicle.

The following Patent Document 1 and Patent Document 2 disclose a vehicle passenger protection system configuration.

On the other hand, passengers who board a self-driving car do not drive directly, so they can have a meeting by swiping the seat in the left-right direction while traveling to the destination, or take a break by recline the backrest. have.

As such, in the autonomous vehicle, as the seat and the backrest are free to rotate, the direction and posture of the occupant may be variously changed.

Accordingly, there is a need for an airbag technology that can safely protect a passenger, regardless of the direction and attitude of the passenger in the event of a vehicle collision.

1 is a view illustrating a state of an occupant and an airbag when a vehicle crashes.

In the front airbag device 1 according to the prior art, as shown in FIG. 1, when a front collision of the vehicle occurs while the occupant rotates the backrest 2 rearward, the distance from the occupant increases (Δa) Accordingly, even if the airbag cushion 3 is inflated and deployed, there is a problem that the occupant cannot be effectively restrained.

For this reason, the airbag device of the vehicle according to the prior art may cause the occupant to be injured when a collision accident of the vehicle occurs while the occupant rotates backward.

Accordingly, there is a need to develop a technology capable of safely protecting the occupant by adjusting the inflation volume of the airbag cushion according to the inclination angle of the occupant when the vehicle crashes.

[Advanced technical literature]

(Patent Document 1) Korean Patent Registration No. 10-1655569 (announced on September 8, 2016)

(Patent Document 2) Korean Patent Registration No. 10-1611087 (announced on April 11, 2016)

An object of the present invention is to solve the problems as described above, and to provide an airbag device for a vehicle that safely protects an occupant by adjusting an inflation volume of an airbag cushion according to an inclination angle of the occupant when the vehicle crashes.

Another object of the present invention is to provide a vehicle airbag device for restraining a passenger by selectively operating a plurality of inflators and an airbag chamber according to an inclination angle of the occupant.

In order to achieve the above object, the airbag device of a vehicle according to the present invention includes a housing forming an outer shape, a plurality of inflators selectively ignited to generate gas when a vehicle crashes, and a rolled or folded state inside the housing Includes an airbag cushion provided with a plurality of chambers that are received and supplied with gas generated from each inflator in the event of a vehicle collision and expanded toward the front of the occupant. It is characterized by expanding and expanding.

As described above, according to the airbag device of the vehicle according to the present invention, the effect that the plurality of chambers provided in the airbag cushion can be selectively expanded and expanded according to the seating posture of the occupant is obtained.

Accordingly, according to the present invention, when the occupant is in a reclining posture by rotating the backrest backward, all of the plurality of chambers are expanded and deployed to compensate for the distance from the occupant, thereby effectively restraining the occupant and safely protecting the occupant. .

1 is a view illustrating the state of the occupant and the airbag when the vehicle crashes,

2 is a block diagram of an airbag device for a vehicle according to a preferred embodiment of the present invention,

FIG. 3 is a state diagram of an operation in a collision of a vehicle to which the airbag device shown in FIG. 2 is applied;

4 and 5 are exploded views of the first and second chambers of the airbag cushion, respectively.

6 and 7 is an operating state showing a state in which the airbag cushion is expanded and deployed.

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

In this embodiment, the configuration of the airbag device applied to the passenger seat of the autonomous vehicle is described, but the present invention is not necessarily limited to this, and it should be noted that it may be applied to the passenger seat or driver's seat in an autonomous vehicle and a general vehicle. do.

Hereinafter, the direction toward the front of the car centered on the passenger seat is referred to as'front', and the direction toward the rear of the car is called'rear'. In addition, terms indicating directions such as'left','right','upper' and'downward' are defined to indicate respective directions based on the front and rear.

2 is a configuration diagram of an airbag device of a vehicle according to a preferred embodiment of the present invention, and FIG. 3 is a state diagram of an operation of a vehicle to which the airbag device shown in FIG. 2 is applied when a vehicle crashes.

The airbag device 10 of the vehicle according to the present invention is an occupant by applying an airbag cushion 40 having a plurality of chambers and a plurality of inflators 30 for supplying each chamber gas, as shown in FIGS. 2 and 3. A plurality of chambers are selectively expanded and expanded toward the front of the occupant according to the inclination angle of the seat back seat.

Accordingly, the present invention can protect the occupant safely by compensating for the distance from the occupant, even when the occupant is in a leaning state by rotating the backrest of the seat backward.

On the other hand, in this embodiment, the first and

second chambers

50 and 60 are provided in the airbag cushion 40, and the first and

second inflators

31 and 32 supplying gas to each

chamber

50 and 60 It is described that is provided, but the present invention is not necessarily limited to this, and may be changed to provide three or more chambers in the airbag cushion 40 and to apply three or more inflators 30 connected to each chamber. It should be noted.

2, the airbag device 10 of a vehicle according to a preferred embodiment of the present invention includes a housing 20 forming an outer shape, a plurality of inflators 30 that are selectively ignited to generate gas when a vehicle crashes. ) And the airbag cushion 40 provided with a plurality of chambers that are accommodated inside the housing 20 in a rolling or folded state and are expanded and expanded toward the front of the occupant by receiving gas generated from each inflator 30 when the vehicle crashes. Includes.

Along with this, the airbag device 10 of a vehicle according to a preferred embodiment of the present invention includes an angle sensor 13 for detecting the angle of the back 12 of the seat 11 seated by an occupant and an angle sensor for collision of a vehicle Based on the detection signal of (13) may further include a control unit 14 for generating a control signal to selectively ignite a plurality of inflator (30).

The housing 20 is formed in a substantially hexahedral shape so that a space for accommodating the inflator 30 and the airbag cushion 40 is provided therein, and installed at a position corresponding to the front of the occupant on a dash board panel. Can be.

Of course, the housing 20 may be installed on the steering wheel when applied to the driver's seat.

A space in which the airbag cushion 40 provided with the plurality of inflators 30 and the plurality of chambers is accommodated may be provided inside the housing 20.

The plurality of inflators 30, that is, the first and

second inflators

31 and 32 are installed upward from the lower portion of the housing 20, respectively, and the first of the airbag cushions 40 housed inside the housing 20 And

second chambers

50 and 60, respectively.

That is, the airbag cushion 40 includes the first and

second chambers

50 and 60, and the first chamber 50 and the second chamber 60 are partially sewn so that they can be deployed together when the vehicle crashes. Can be joined to each other in a manner or the like.

The control unit 14 is only the first inflator 31 when the occupant is seated in a normal posture (hereinafter referred to as'normal posture') in which the backrest 12 of the seat 11 is rotated below a preset reference angle. A control signal can be generated to ignite.

And the control unit 14 is the first and second when the occupant is seated in a reclining or lying down position (hereinafter referred to as'leaning posture') after the passenger rotates the backrest 12 in excess of the reference angle. A control signal may be generated to ignite the

inflators

31 and 32 together.

Next, the configuration of the airbag cushion will be described in detail with reference to FIGS. 4 to 7.

4 and 5 are exploded views of the first chamber and the second chamber of the airbag cushion, respectively, and FIGS. 6 and 7 are operating state diagrams showing the airbag cushion inflated and deployed.

FIG. 6 shows a state in which only the first chamber is expanded and deployed in the airbag cushion, and FIG. 7 shows a state where both the first and second chambers are expanded and deployed.

The first chamber 50 is a portion that is expanded and expanded by receiving gas from the first inflator 31, and may be provided in a shape and volume corresponding to a general passenger airbag cushion.

For example, as shown in FIGS. 4 and 6, the first chamber 50 includes a pair of side wall portions (51) and a pair of side wall portions forming both side surfaces of the main wall portion (51) and the main wall portion (51). 52) can be expanded and expanded into a substantially spherical shape or a hexahedral shape with rounded corners.

The main wall portion 51 may be formed in a substantially rectangular plate shape having a longer vertical length than a horizontal length when viewed in FIG. 4.

The pair of side wall portions 52 are formed in a substantially rectangular plate shape in which each vertex portion is rounded, and in each side wall portion 52, a vent hole for discharging high-pressure gas supplied to the first chamber 50 is formed. Can be.

As illustrated in FIGS. 5 to 7, the second chamber 60 expands and expands by receiving gas from the second inflator 32 when the occupant is in an upright posture state.

For example, the second chamber 60 expands the gas generated from the expansion unit 61 and the second inflator 32 to expand and expand to compensate for the space between the first chamber 50 and the occupant. It may include a connection portion 62 that is connected to the second inflator 32 to transfer to.

As shown in FIG. 5, the second chamber 60 forms an inner panel 63 in contact with an occupant and an outer panel 64 in contact with the first chamber 50 in a symmetrical shape, and the inner panel In the state where the 63 and the outer panel 64 are overlapped, they may be manufactured in a bag shape by joining with a sewing method along the edge.

The expansion unit 61 is shaped according to the result of measuring the space between the occupant and the first chamber 50 according to the rotation angle of the backrest 12 to compensate for the space between the first chamber 50 and the occupant And the volume can be set.

That is, the thickness in the front-rear direction of the expansion unit 61 may be set to correspond to the distance between the first chamber 50 and the occupant.

The delivery unit 62 is horizontally disposed in the front-rear direction along one side of the first chamber 50, the side wall portion 51 disposed on the left side in FIGS. 6 and 7, and expands the gas generated in the second inflator 32 It functions as a flow path to be transferred to the unit 61.

Meanwhile, it is preferable that the second chamber 60 is partially fixed to the rear surface of the first chamber 50 so as to be deployed together with the first chamber 50 even when only the first chamber 50 is expanded and deployed.

For example, the expansion portion 61 may be fixed to the rear side of the first chamber 50 in a state of being disposed on the rear side of the first chamber 50, respectively, by sewing or bonding.

That is, as shown in FIG. 4, the first junction portion 53 is provided at the left end of the side wall portion 52 disposed on the right side of the main wall portion 51 of the first chamber 50, and the lower end portion of the main wall portion 51 Second and

third junctions

54 and 55 may be provided on both sides.

In addition, as shown in FIG. 5, a pair of fourth joints joined to the first joint 53 at the upper ends of the connection unit 62 regions provided on the inner and

outer panels

63 and 64 of the second chamber 60, respectively 65) may be provided, and a pair of sixth joints 67 joined to the third joints 55 may be provided at the outer ends of the regions of each of the expanders 61.

In addition, a fifth connection portion 66 that is joined to the second connection portion 54 is provided at a portion where the expansion portion 61 and the connection portion 62 provided on the outer panel 64 in contact with the first chamber 50 are connected. Can be.

So, as the second chamber 60 is fixed to the first chamber 50 by bonding of the first to sixth joints 53 to 55 and 65 to 67, even if no gas is supplied from the second inflator 32, , When the first chamber 50 is expanded and deployed, it is deployed together.

In addition, when the gas is supplied from the second inflator 32, the second chamber 60 is expanded and expanded between the first chamber 50 and the occupant to compensate for the distance from the occupant.

At this time, since the second chamber 60 is a state where only the outer panel 64 is fixed to the first chamber 50 by the fifth and

sixth joints

66 and 67, the inner panel of the second chamber 60 ( 63) may be expanded and expanded by the gas supplied through the connecting portion (62).

Thus, the present invention can selectively expand and expand a plurality of chambers provided in the airbag cushion according to the seating posture of the occupant.

Accordingly, according to the present invention, when the occupant rotates the backrest in the reclining posture, the plurality of chambers are expanded and expanded to compensate for the distance from the occupant, thereby effectively restraining the occupant and protecting the occupant.

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

That is, in the above embodiment, the configuration of the airbag device applied to the passenger seat of the autonomous vehicle will be described, but the present invention is not necessarily limited thereto, and is changed to be applicable to the passenger seat or driver's seat in the autonomous vehicle and the general vehicle. Can be.

The present invention is applied to the technology of an airbag device for a vehicle that selectively protects the occupant by compensating the distance to the occupant by selectively inflating and deploying a plurality of chambers provided in the airbag cushion according to the occupant's sitting posture.

Claims

Housing forming the outer shape,

A plurality of inflators that selectively ignite and generate gas when a vehicle crashes, and

An airbag cushion provided in a rolled or folded state inside the housing and provided with a plurality of chambers that are expanded and expanded toward the front of the occupant by receiving gas generated from each inflator when a vehicle crashes,

An airbag device for a vehicle, characterized in that a plurality of chambers provided in the airbag cushion are selectively inflated and deployed according to the seating posture of the occupant.
According to claim 1,

An angle detection sensor that detects the angle of the back of the seat on which the occupant is seated, and

Further comprising a control unit for generating a control signal to selectively ignite the plurality of inflators based on the detection signal of the angle sensor in the event of a collision of a vehicle,

The control unit controls to ignite only one of the plurality of inflators when the backrest is below a preset reference angle,

When the backrest is rotated in excess of the reference angle, the airbag device of the vehicle, characterized in that to control to compensate for the distance to the occupant by expanding and expanding all the chambers provided in the airbag cushion.
The method according to claim 1 or 2,

The inflator includes first and second inflators,

The airbag cushion includes first and second chambers that are expanded and expanded by receiving gas from the first and second inflators,

The second chamber is partially fixed to the rear surface of the first chamber, the airbag device of the vehicle, characterized in that even if only the first chamber is expanded and deployed, the first chamber.
According to claim 3,

The first chamber and the main wall portion in contact with the front of the occupant

Including the pair of side walls forming both side surfaces of the main wall portion, the sphere shape or each edge is expanded and expanded into a hexahedron shape,

The second chamber expands and expands to compensate for the space between the first chamber and the occupant, and

And a connection part connected to the second inflator to transfer the gas generated from the second inflator to the expansion part,

The airbag device characterized in that the thickness in the front-rear direction of the expansion portion is set to correspond to the distance between the first chamber and the occupant.
The method of claim 4,

A first bonding portion is provided at the other end of the side wall portion disposed on one side of the main wall portion of the first chamber,

Second and third joints are provided on both sides of the lower end of the main wall, respectively.

The second chamber is formed by forming an inner panel in contact with an occupant and an outer panel in contact with the first chamber in a symmetrical shape, and joining the inner panel and the outer panel in a state of overlapping with a sewing method along an edge to form a bag. Is manufactured,

In the second chamber, a pair of fourth joints that are joined to the first joints are provided at the upper end of the connection region provided on each of the inner and outer panels,

A pair of sixth joints that are joined to the third joints are provided at the outer ends of each of the expander regions,

An airbag device for a vehicle, characterized in that a fifth connection part is provided with the second connection part is provided at a portion where the expansion part and the connection part provided on the external panel contacting the first chamber are connected.