KR20240124126A - Side airbag apparatus for vihicle - Google Patents

Abstract

A side airbag device for an automobile comprises: a first airbag cushion and a second airbag cushion built into a body component arranged on the side of an occupant and inflated and deployed on the side of an occupant when a collision of the automobile occurs; and first and second inflators which generate gas in response to an impact detection signal and supply the gas to the first and second airbag cushions, respectively; and the first and second airbag cushions are configured to inflate and deploy between the side of the corresponding part of the occupant and the body component in a shape corresponding to the upper and lower body sides of the occupant, respectively, depending on the direction in which the occupant sits on the seat, so as to inflate and deploy the airbag cushion on the side of the occupant when a collision of the automobile occurs, thereby safely protecting the occupant.

Description

SIDE AIRBAG APPARATUS FOR VIHICLE

The present invention relates to a side airbag device for an automobile, and more specifically, to a side airbag device for an automobile that protects an occupant by preventing a collision between the occupant and the side wall and door of the automobile body when a collision occurs.

In general, an automobile airbag device is a safety device that protects passengers by rapidly inflating the airbag by injecting gas into the airbag according to the signal from the impact detection sensor in the event of a car collision.

These airbag devices are installed on the steering wheel, dashboard, seat, side wall, etc. of a car, and inflate toward the front or side of the occupants when the car collides, protecting them.

That is, the automobile may be equipped with front airbags that deploy in front of the driver and passenger seats, curtain airbags and side airbags that deploy in the direction of a side collision (hereinafter referred to as the “collision side”) to protect passengers, and knee airbags to protect passengers’ knees.

Side airbags include the so-called near side airbags, which inflate and deploy between the passenger and body components such as the door, and protect the passenger from body components that protrude inward due to the impact of a side collision, and the far side airbags or center side airbags, which limit the movement of the passenger toward the inside of the vehicle due to the reaction of a side collision.

Meanwhile, autonomous vehicles that can move on their own without a driver driving the vehicle are being developed recently.

The above autonomous vehicle uses cutting-edge sensors capable of recognizing surrounding objects and high-performance graphic processing units to detect each device installed in the vehicle and the situation around the vehicle, and controls the operation of each device installed in the vehicle based on the detection results to drive.

Since autonomous vehicles configured in this way do not require a driver to drive, all seats, including the driver's seat, can freely swivel left and right, and the backrest can be tilted to recline backwards to adjust the angle of the backrest to a horizontal state. Therefore, passengers can adjust the angle of the backrest in various ways, and can even rotate the seat to face the passenger in the back seat and hold a conference.

Accordingly, it is impossible to apply a typical airbag device designed based on the passenger's seated posture facing forward to autonomous vehicles.

That is, the side airbag device according to the prior art was designed based on the passenger's sitting posture in the seat.

Therefore, in the event of a side impact of a vehicle with the occupant's seatback tilted rearward, the occupant's pelvis moves from the seat toward the front of the vehicle, thereby protruding further forward than in a conventional side airbag.

Because of this, side airbags according to conventional technology had the problem of not protecting the passenger's pelvic area.

In addition, when the passenger rotates the backrest rearward to assume a lying position, there was a problem in that the curtain airbag according to the prior art could not protect the passenger's head when the passenger's head was located lower than the curtain airbag that expanded downward from the roof side rail of the vehicle body.

Therefore, side airbag technology that can safely protect passengers regardless of their direction and posture in the event of a car collision is required.

Republic of Korea Patent Registration No. 10-1866083 (announced on June 11, 2018) Republic of Korea Patent Registration No. 10-1708213 (announced on February 20, 2017)

The purpose of the present invention is to solve the above-mentioned problem, and to provide a side airbag device for an automobile that can safely protect an occupant by inflating and deploying to the side of the occupant when the automobile is in a side collision.

Another object of the present invention is to provide a side airbag device for an automobile capable of safely protecting an occupant by restraining the entire upper body side from the pelvic area to the head area of the occupant regardless of the direction and posture of the occupant in an autonomous automobile.

Another object of the present invention is to provide a side airbag device for an automobile capable of safely protecting an occupant by restraining the occupant's lower body together with the occupant's upper body.

In order to achieve the above-described object, a side airbag device for a vehicle according to the present invention includes a first airbag cushion and a second airbag cushion that are built into a body component arranged on the side of a passenger and inflate and deploy on the side of a passenger when a collision of the vehicle occurs, and first and second inflators that generate gas in response to an impact detection signal and supply the gas to the first and second airbag cushions, respectively, and the first and second airbag cushions are characterized in that they inflate and deploy between the side of the corresponding part of the passenger and the body component in a shape corresponding to the upper and lower body sides of the passenger, respectively, depending on the direction in which the passenger sits on the seat.

As described above, the side airbag device of the automobile according to the present invention has the effect of safely protecting the passenger by inflating and deploying the airbag cushion on the passenger's side when a collision of the automobile occurs.

That is, according to the present invention, the effect of being able to protect the upper and lower body sides of a passenger as a whole is obtained by inflating and deploying the first and second airbag cushions respectively in body component members arranged on the side of the vehicle.

And according to the present invention, the effect of safely protecting the head area of the passenger that goes beyond the protection area of the curtain airbag cushion in the passenger's recline mode using the side airbag device is obtained.

In addition, according to the present invention, by using one airbag cushion provided in a side airbag device to protect the side of the upper body area of the passenger, and inflating and deploying another airbag cushion toward the front of the passenger to restrain the passenger from moving, the effect of maximizing the protection effect for the passenger is obtained.

In addition, according to the present invention, the effect of safely protecting the passenger regardless of the passenger's posture and direction is obtained by controlling the width of deployment of each airbag cushion according to the seating direction of the passenger and inflating and deploying it.

Figure 1 is a configuration diagram of a side airbag device of an automobile according to the first embodiment of the present invention.
Figure 2 is a side view showing the airbag cushion deployed in the side airbag device of the vehicle illustrated in Figure 1.
Figure 3 is a configuration diagram of a side airbag device of a vehicle according to the second embodiment of the present invention.
Figure 4 is a configuration diagram of a side airbag device of a vehicle according to a third embodiment of the present invention.
Figures 5 and 6 are schematic diagrams showing modified examples of the side airbag device illustrated in Figure 4, respectively.
FIG. 7 and FIG. 8 are configuration diagrams of a side airbag device of an automobile according to a fourth embodiment of the present invention.

Hereinafter, a side airbag device for an automobile according to a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

Below, the configuration of a side airbag device installed on the driver's seat of a typical vehicle is described. The direction toward the front of the vehicle centered on the driver's seat is referred to as 'forward (F)', and the direction toward the rear of the vehicle is referred to as 'rear (B)'. In addition, terms indicating directions such as 'left (L)', 'right (R)', 'upper (U)', and 'downer (D)' are defined as indicating each direction based on the front and rear.

Therefore, the forward and backward (F, B) directions of the car can be expressed in the horizontal direction, and the up and down (U, D) directions of the car can be expressed in the vertical direction.

And below, the configuration of a near side airbag device that expands and deploys between a passenger and a body component such as a door and protects the passenger from a body component that protrudes inward due to the impact of a side collision is described.

Of course, the present invention may be modified to be applicable to a far side airbag or a center side airbag that limits the movement of an occupant moving inward of a vehicle due to the reaction of a side collision.

[First embodiment]

FIG. 1 is a configuration diagram of a side airbag device of a vehicle according to a first embodiment of the present invention, and FIG. 2 is a side view showing the side airbag device of the vehicle illustrated in FIG. 1 in a state where an airbag cushion is deployed.

This embodiment describes the configuration of a side airbag device for protecting an occupant, i.e., a driver, seated in the driver's seat of a vehicle in which seats are arranged along two rows.

Of course, it should be noted that the present invention can be applied not only to the driver's seat of a car, but also to the passenger seat, and can be equally applied to a plurality of rear row seats, such as the second or third row seats.

And in this embodiment, it is explained that the first and second airbag cushions (20, 30) are inflated and deployed on the passenger's side in a normal seating mode in which the passenger is normally seated in the driver's seat, and a reclining mode in which the passenger assumes a lying position by tilting the backrest (12) of the seat (11) backward.

A side airbag device (10) for a vehicle according to a preferred embodiment of the present invention includes, as illustrated in FIGS. 1 and 2, a first airbag cushion (20) that is built into a body component arranged on the side of a passenger and inflates and deploys to correspond to the side of the passenger's upper body when a collision of the vehicle occurs, a second airbag cushion (30) that inflates and deploys on the side of the passenger's lower body, and first and second inflators (40, 50) that generate gas by an impact detection signal when a collision of the vehicle occurs and supply the gas to the first and second airbag cushions, respectively.

For example, the first and second airbag cushions (20, 30) may be installed in the front door (15) and the front door (16), respectively, which are positioned close to one side of the area where the passenger's upper and lower bodies are positioned.

That is, based on the state where the driver is seated on the driver's seat (11) facing the front of the car, the first airbag cushion (20) can be built into the rear door (16), and the second airbag cushion (30) can be built into the front door (15).

Alternatively, the first and second airbag cushions (20, 30) may be built into armrests (14) installed in the rear door (16) and the front door (15), respectively.

In this way, the first airbag cushion (20) inflates and deploys between the passenger's pelvis and upper body and body component members such as doors, and safely protects the passenger's pelvis and upper body from body component members protruding inwardly due to the impact of a car collision, particularly a side collision. In addition, the second airbag cushion (20) inflates and deploys between the passenger's lower body and body component members, and safely protects the passenger's lower body from body component members protruding inwardly.

To this end, the first and second airbag cushions (20, 30) are formed to inflate and deploy into a hexahedral shape having a roughly square cross-section or a roughly spherical shape having a circular or elliptical cross-section, respectively, and can inflate and deploy upward and forward from the side of the passenger.

That is, the first and second airbag cushions (20, 30) can be formed in shapes and sizes corresponding to the shapes of the body parts of the passenger they are intended to protect.

For example, the first airbag cushion (20) is pulled out of the rear door (16) or the armrest (14) through a cut line formed in the rear door (16) or the armrest (14) installed in the rear door (16), and can be inflated and deployed upward and forward, upward and rearward, or upward and front and rearward toward the lower body side of the passenger.

And the second airbag cushion (30) is pulled out of the front door (15) or the armrest (14) through the hanging line formed on the front door (15) or the armrest (14) installed on the front door, and can be inflated and deployed upward and forward, upward and rearward, or upward and front and rearward toward the passenger's pelvis and the side of the upper body.

These first and second airbag cushions (20, 30) can be formed into a bag shape by sewing or the like, by joining the edges of the inner panel that comes into contact with the passenger and the outer panel provided on the opposite side when inflated. In addition, the first and second airbag cushions (20, 30) can be divided into a plurality of chambers by one or more chamber walls, which are non-inflated regions.

Meanwhile, the length in the front-back direction and the height in the up-down direction of the first airbag cushion (20) can be formed to a length and height corresponding to the side of the head area from the pelvic area of the passenger.

And the length in the front-back direction and the height in the up-down direction of the second airbag cushion (30) can be formed to a length and height corresponding to the lower body side of the passenger's pelvic area.

Of course, the present invention is not necessarily limited thereto, and the length in the front-back direction and the height in the up-down direction of the first and second airbag cushions can be variously changed and set to correspond overall to the positions and heights at which the upper and lower body parts of the passenger are positioned according to various angles at which the backrest can rotate rearward in the recline mode.

In addition, the length of the second airbag cushion (30) in the front-back direction can be changed in various ways, such as from the passenger's pelvis to the feet, or from the pelvis to the knees.

The first and second airbag cushions (20, 30) configured in this manner are connected to the first and second inflators (40, 50) through introduction portions provided on one side, respectively, and can be accommodated inside the first and second airbag housings (60, 70) in a rolled or folded state in various ways to configure an airbag module.

Next, the operating method of the side airbag device of an automobile according to the first embodiment of the present invention will be described in detail.

The side airbag device (10) mounted on a vehicle inflates and deploys the first and second airbag cushions (20, 30) when a collision occurs in the vehicle to protect the side of the passenger.

First, in the normal seating mode of a passenger seated facing forward, the first and second airbag cushions (20, 30) are inflated and deployed between the rear door (16) and the passenger's upper body area and between the front door (15) and the passenger's lower body area, respectively.

At this time, the first airbag cushion (20) can protect the entire upper body of the passenger, especially the upper body excluding the head area, in conjunction with the curtain airbag cushion (100).

That is, the head area of the passenger is protected by a curtain airbag cushion (100) that expands downward from the side roof rail of the vehicle, and the neck area to the pelvic area of the passenger can be protected by a first airbag cushion (20) that expands from the rear door (16) or armrest (14).

And the lower body area including the passenger's pelvis can be protected by a second airbag cushion (30) that expands and deploys from the front door (15) or armrest (14).

On the other hand, in the passenger's recline mode, the curtain airbag cushion (100) does not protect the passenger's upper body, especially the head area, because the downward unfolding height is limited.

Accordingly, the first airbag cushion (20) can be inflated and deployed to correspond to the side of the passenger's upper body area. And the second airbag cushion (30) can be inflated and deployed to correspond to the side of the passenger's lower body area.

At this time, the front end of the first airbag cushion (20) and the rear end of the second airbag cushion (30) are inflated and deployed in close contact with each other or in a state where they are almost in contact, thereby protecting the passenger's pelvic area.

Of course, the present invention is not necessarily limited to this, and the deployment shapes of the first and second airbag cushions (20, 30) can be set or controlled so as to protect the passenger's pelvic area by using the front part of the first airbag cushion (20) or by using the rear part of the second airbag cushion (30).

In addition, the present invention can also control the front end of the first airbag cushion (20) and the rear end of the second airbag cushion (30) to be deployed so as to overlap each other by a preset width, and limit the expansion thickness of the overlapping portion to be the same as that of the other portions.

Here, since the lower body of the passenger is positioned lower than the upper body, the first airbag cushion (20) can be inflated and deployed at a position higher than the deployment height of the second airbag cushion (30), and the second airbag cushion (30) can be inflated and deployed at a position lower than the deployment height of the first airbag cushion (20).

To this end, the first airbag housing (60) in which the first airbag cushion (20) and the first inflator (40) are accommodated may be installed at a higher position than the second airbag housing (70) in which the second airbag cushion (30) and the second inflator (50) are accommodated.

Of course, the present invention can also be controlled to limit the deployment direction of the first and second airbag cushions (20, 30) by installing the first and second airbag housings (60, 70) at the same height and using a tether member or the like.

That is, the deployment shape of the first airbag cushion (20) can be controlled to inflate and deploy at a relatively high position using a tether member or the like, and the deployment shape of the second airbag cushion (30) can be controlled to inflate and deploy at a relatively low position.

In this way, when a collision of an automobile occurs, the present invention can protect the upper and lower body sides of the passenger as a whole by inflating and deploying the first and second airbag cushions respectively in body component members disposed on the side of the vehicle, i.e., the door or the armrest.

In particular, the present invention can safely protect the head area of an occupant that goes beyond the protection area of a curtain airbag cushion in the occupant's recline mode by using a side airbag device.

Accordingly, the present invention can safely protect a passenger regardless of the passenger's posture.

Meanwhile, in this embodiment, the first and second airbag cushions (20, 30) are inflated and deployed respectively in the door (13) or armrest (14) placed on the side of the vehicle to protect the upper and lower bodies of the passenger, but the present invention is not necessarily limited to this.

[Second embodiment]

Fig. 3 is a configuration diagram of a side airbag device of an automobile according to a second embodiment of the present invention. Fig. 3 is a side view showing the first and second airbag cushions (20, 30) installed on the pillar (17) inflated and deployed rearward and forward, respectively.

According to the second embodiment of the present invention, the side airbag device (10) of an automobile can inflate and deploy the first and second airbag cushions (20, 30) rearward and forward, respectively, from the pillar (17) disposed between the front door (15) and the rear door (16), i.e., the side pillar (or center pillar), instead of the door (13) or the armrest (14), as illustrated in FIG. 3.

To this end, the first and second airbag housings (60, 70) are installed in the up-down direction or the front-back direction respectively inside the filler (17), and a cut line can be formed in the filler (17) so that the first and second airbag cushions (20, 30) can be drawn out of the filler (17) and inflated and deployed.

Therefore, when a collision of a car occurs, the first airbag cushion (20) can inflate and deploy toward the rear and upward, rear and upward and downward, or rear and downward to correspond to the upper body side of the passenger, depending on the height at which the first airbag housing (60) is installed.

And the second airbag cushion (30) can inflate and deploy forward and upward, forward and upward and downward, or forward and downward to correspond to the lower body side of the passenger, depending on the height at which the second airbag housing (70) is installed.

In this way, the present invention can safely protect the upper and lower body sides of a passenger by inflating and deploying the first and second airbag cushions respectively in the pillars arranged on the side of the vehicle when a collision of the vehicle occurs.

[Third embodiment]

Fig. 4 is a configuration diagram of a side airbag device of a vehicle according to a third embodiment of the present invention, and Figs. 5 and 6 are configuration diagrams showing modified examples of the side airbag device shown in Fig. 4, respectively. Figs. 4 and 5 illustrate a plan view of each airbag cushion in an inflated and deployed state, and Fig. 6 illustrates a side view of the second and third airbag cushions in an inflated and deployed state.

The side airbag device (10) of a vehicle according to the third embodiment of the present invention can inflate and deploy the second airbag cushion (30) so that it is placed in front of the passenger from a body component positioned on the lower body side of the passenger, such as a front door (15), an armrest (14), or a pillar (17), as shown in FIG. 4.

To this end, the second airbag cushion (30) may be provided to have a wider width than the left-right width of the first airbag cushion (20).

Therefore, when a collision occurs in a car, the second airbag cushion (30) can inflate and deploy from the body component toward the front of the passenger, from the left side to the right side as seen in Fig. 4.

Of course, the second airbag cushion (30) can be inflated and deployed toward the right and upward, right and downward, or right and upward and downward.

Therefore, the second airbag cushion (30) can be inflated and deployed in front of the passenger to pressurize and restrain the backrest of the seat to limit the forward movement of the passenger.

In addition, the second airbag cushion (30) is inflated and deployed to a height corresponding to the front of the passenger, i.e., the front of the upper body, to limit the forward movement of the passenger, while preventing injury to the passenger caused by objects facing the passenger from the front or side of the passenger, such as parts forming the car body.

In addition, the second airbag cushion (30) may be inflated downward to adhere to the lower body of the passenger, particularly the thigh area, or to press downward on the thigh area, thereby maximizing the restraint effect on the passenger.

Meanwhile, in the present embodiment, the side airbag device (10) may further include a third airbag cushion (80) that expands and deploys toward the front of the passenger, together with a second airbag cushion (30) that protects the side of the passenger's lower body, as shown in FIGS. 5 and 6.

That is, the second airbag cushion (30) is inflated and deployed between the body component and the passenger's lower body area, as described in the first embodiment above, to protect the side of the passenger's lower body area.

And the third airbag cushion (80) expands and deploys toward the front of the passenger, like the second airbag cushion (30) illustrated in Fig. 4, to restrain the passenger from moving forward.

This third airbag cushion (80) may be provided separately from the second airbag cushion (30) or may be provided as a separate chamber connected to the second airbag cushion (30).

Accordingly, the second inflator (50) may be provided with an increased capacity compared to the case where only the second airbag cushion (30) is applied, or a third inflator (not shown in the drawing) may be additionally provided to inflate and deploy the third airbag cushion (80) separately from the second inflator (50).

In this way, the present invention protects the side of the upper body of a passenger by using the first airbag cushion provided in the side airbag device, and inflates and deploys the second airbag cushion or the third airbag cushion toward the front of the passenger to restrain the passenger from moving forward, thereby maximizing the protection effect for the passenger.

[Example 4]

FIG. 7 and FIG. 8 are configuration diagrams of a side airbag device of a vehicle according to a fourth embodiment of the present invention. FIG. 7 is a plan view showing a state in which the first and second airbag cushions are deployed to protect a occupant seated facing forward, and FIG. 8 is a plan view showing a state in which the first and second airbag cushions are deployed to protect a occupant seated by rotating the seat toward the rear.

The side airbag device (10) of an automobile according to the fourth embodiment of the present invention can individually control the deployment shapes of the first and second airbag cushions (20, 30) depending on the boarding direction of the passenger.

To this end, the side airbag device (10) in the present embodiment may further include a tether member (not shown in the drawing) that controls the deployment shape of the first and second airbag cushions (20, 30) and a tether cutter (not shown in the drawing) that operates to cut one of the tether members connected to the first and second airbag cushions (20, 30) respectively according to a control signal from a control unit provided in the vehicle.

Therefore, when the tether member connected to each cushion is cut, the first and second airbag cushions (20, 30) expand and deploy toward the front of the passenger with an increased deployment width, and when the tether member is not cut and remains connected, the deployment width is limited and the cushions can expand and deploy toward the side of the passenger.

As illustrated in Fig. 7, when a collision accident occurs in a vehicle with a passenger facing forward, the tether cutter operates to cut the tether member connected to the second airbag cushion (30) according to a control signal from the control unit.

Then, the first airbag cushion (20) expands and deploys with a limited deployment width by a tether member between the passenger's upper body side and the vehicle body component, thereby protecting the passenger's entire upper body side from the pelvis.

And, as the tether member connected to the second airbag cushion (30) is cut, the second airbag cushion (30) expands and deploys with an increased deployment width toward the front of the passenger, thereby restraining the passenger from moving forward.

That is, the second airbag cushion (30) is inflated and deployed in front of the passenger with a deployment width (W2) greater than the deployment width (W1) of the first airbag cushion (20) (W1<W2).

On the other hand, as shown in Fig. 8, if a collision accident occurs in a vehicle while the passenger is in the seat (11) swivel facing rearward, the tether cutter operates to cut the tether member connected to the first airbag cushion (20) according to the control signal of the control unit.

Then, the second airbag cushion (30) expands and deploys between the passenger's upper body side and the body component to protect the passenger's entire upper body, starting from the pelvis.

And the first airbag cushion (20) expands and deploys toward the front of the passenger seated toward the rear, thereby restraining the passenger from moving backward.

That is, the first airbag cushion (20) is inflated and deployed to a width (W3) greater than the deployment width (W4) of the second airbag cushion (30) and is inflated and deployed in front of the passenger (W4<W3).

In this way, the present invention controls the deployment shapes of the first and second airbag cushions according to the seating direction of the passenger, thereby protecting the upper body side of the passenger, while safely protecting the passenger by restraining the passenger from moving in the opposite direction of the seat.

Although the invention made by the present inventor has been specifically described according to the above embodiments, the present invention is not limited to the above embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

The present invention is applied to a technology for a side airbag device for an automobile that can safely protect an occupant by inflating and deploying to the side of the occupant in the event of a side collision of the automobile.

10: Side airbag device of the automobile
11: Seat 12: Backrest
13: Door 14: Armrest
15: Front door 16: Rear door
17: Filler
20,30,80: 1st, 2nd, 3rd airbag cushions
40, 50: 1st and 2nd inflators
60, 70: 1st and 2nd housing
100: Curtain airbag cushion

Claims (8)

A first airbag cushion and a second airbag cushion are built into a body component placed on the passenger's side and inflate and deploy on the passenger's side when a collision occurs in the car.
It includes first and second inflators that generate gas by an impact detection signal and supply it to the first and second airbag cushions, respectively.
A side airbag device for an automobile, characterized in that the first and second airbag cushions are inflated and deployed between the corresponding side of the passenger's body and the vehicle body component, with the shapes corresponding to the upper and lower body sides of the passenger, respectively, depending on the direction in which the passenger sits on the seat. In the first paragraph,
The above first and second airbag cushions work in conjunction with the curtain airbag cushions to protect the upper and lower body of the passenger when the passenger is in normal seating mode.
A side airbag device for an automobile characterized in that it inflates and deploys to protect the entire body from the head to the lower body of the passenger when the passenger is in recline mode. In the second paragraph,
The above first airbag cushion and the first inflator are built into the first airbag housing,
The above second airbag cushion and second inflator are built into the second airbag housing,
The above first and second airbag housings are respectively built into the front door and the rear door, or
Built into the armrest provided in each of the front or rear doors, or
Or a side airbag device of an automobile, characterized in that it is built into a pillar between the front door and the rear door. In the third paragraph,
The first and second housings are installed at the same height or at different heights, respectively.
A side airbag device for an automobile, characterized in that the deployment direction of the first and second airbag cushions is limited depending on the body part of the passenger to be protected. In any one of claims 1 to 3,
A side airbag device for an automobile, characterized in that among the first and second airbag cushions, the airbag cushion that is deployed on the lower body side of the passenger expands and deploys toward the front of the passenger, thereby restraining the passenger from moving. In any one of claims 1 to 3,
A side airbag device for an automobile, characterized in that it further includes a third airbag cushion that inflates and deploys from the lower body side of an occupant to restrain the occupant from moving. In Article 6,
A side airbag device for an automobile, characterized in that the third airbag cushion is connected to an airbag cushion arranged on the lower body side of a passenger or is provided separately from the first and second airbag cushions. In any one of claims 1 to 3,
A tether member that limits the deployment shape of the first and second airbag cushions,
Further comprising a tether cutter operable to cut one of the tether members connected to each cushion depending on the riding direction of the passenger;
The above tether cutter operates to cut the tether member connected to the airbag cushion positioned on the side of the passenger's lower body area among the first and second airbag cushions based on a control signal from the control unit.
A side airbag device for an automobile, characterized in that the airbag cushion connected to the cut tether member inflates and deploys toward the front of the passenger with a deployment width that is greater than that of other airbag cushions to restrain the passenger.

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