阅读说明：本技术 侧气囊装置 (Side airbag device ) 是由 柴原多卫 竹林俊宏 椙村勇一 平田基晴 东英孝 南雄太 冈上喜贵 桥本和弥 于 2021-03-29 设计创作，主要内容包括：本发明提供一种能及时地抑制乘客向车辆宽度方向内侧移动的侧气囊装置。侧气囊装置包括：气体发生器,该气体发生器产生气体；以及袋状的气囊,该气囊在气体发生器动作时通过气体膨胀展开以保护乘客的侧部,气囊具有：在乘客的主体的侧方膨胀展开的主体保护部；设于主体保护部的操纵箱侧并且在膨胀展开时被按压到操纵箱的上表面的支承部；以及在乘客的腰部与操纵箱的侧部之间膨胀展开的腰部保护部,支承部和腰部保护部由连续的气室构成,气体发生器在从车辆侧方观察的状态下跨过支承部的上下,气囊经由气体发生器固定于车辆用座椅的侧部。(The invention provides a side airbag device which can timely restrain passengers from moving towards the inner side of the width direction of a vehicle. The side airbag device includes: a gas generator that generates gas; and a bag-shaped airbag that is inflated and deployed by gas when the inflator operates to protect a side portion of the occupant, the airbag including: a main body protection part which is expanded and unfolded at the side of the main body of the passenger; a support portion provided on the console box side of the main body protection portion and pressed against an upper surface of the console box when inflated and deployed; and a waist protection portion that inflates and deploys between a waist of the passenger and a side portion of the console box, the support portion and the waist protection portion being constituted by continuous air chambers, the gas generator being straddled over upper and lower portions of the support portion in a state viewed from a side of the vehicle, the airbag being fixed to the side portion of the vehicle seat via the gas generator.)

1. A side airbag device that inflates and deploys above a console box provided on a vehicle width direction inner side of a vehicle seat, and that inflates and deploys to the side of a passenger seated in the vehicle seat, comprising:

a gas generator that generates gas; and

a bag-shaped airbag that is inflated and deployed by the gas to protect a side portion of the occupant when the inflator is actuated,

the airbag has: a main body protection part which is expanded and unfolded at the side of the main body of the passenger; a support portion provided on the console box side of the main body protecting portion and pressed against an upper surface of the console box when inflated and deployed; and a lumbar protection portion inflated and deployed between the lumbar of the passenger and the side portion of the console box,

the support portion and the waist protecting portion are constituted by continuous air chambers,

the gas generator is arranged to straddle the upper and lower sides of the support portion when viewed from the side of the vehicle,

the airbag is fixed to a side portion of the vehicle seat via the gas generator.

2. The side airbag apparatus according to claim 1,

the support portion and the lumbar protective portion are along the upper surface and the side surfaces of the console box in a state viewed from the vehicle front-rear direction when inflated and deployed, and portions of the support portion and the lumbar protective portion that are opposed to the upper surface and the side surfaces of the console box are constituted by a single continuous base cloth.

3. The side airbag apparatus according to claim 1,

the support portion is pressed to more than half of the upper surface of the console box when inflated and deployed in a state viewed from the vehicle front-rear direction.

4. The side airbag apparatus according to claim 3,

the support portion is pressed to the entire upper surface of the console box at the time of inflation and deployment in a state viewed from the vehicle front-rear direction.

5. The side airbag apparatus according to claim 1,

the main body protecting portion, the supporting portion and the waist protecting portion are constituted by continuous air chambers,

between the upper end portion of the main body protecting portion and the end portion of the support portion on the vehicle width direction inner side, there is no concave portion when inflated and deployed in a state viewed from the vehicle front-rear direction.

6. The side airbag apparatus according to claim 1,

the airbag also has a head protection portion that is provided above the body protection portion and protects the head of the occupant.

Technical Field

The present invention relates to a side airbag device. More specifically, the present invention relates to a side airbag device that inflates and deploys laterally of an occupant in a side collision of a vehicle such as an automobile.

Background

There is known a side airbag device that prevents an occupant from moving inward in the vehicle width direction and coming into contact with an adjacently seated occupant during a side collision of a vehicle.

For example, patent document 1 discloses a vehicle occupant restraint system for effectively suppressing an airbag from moving inward in a vehicle width direction when restraining an occupant. In the vehicle occupant restraint system, the sub-bag is brought into contact with the console box, whereby the main bag is restrained from moving inward in the vehicle width direction when the main bag blocks the occupant, and as a result, the movement of the occupant is restrained.

Further, patent document 2 discloses an airbag for the purpose of holding a passenger in a correct position at the time of a side collision of a vehicle.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2014-108740

Patent document 2: international publication No. 2019/228898

However, in the vehicle occupant restraint system described in patent document 1, since the sub-bag is brought into contact with the corner portion of the console box, the main bag and the sub-bag are rotated around the corner portion of the console box until the upper surface of the console box and the sub-bag are brought into contact. Therefore, it takes time before the passenger stops moving to the vehicle width direction inner side, and the amount of movement of the passenger becomes large.

Further, in the conventional side airbag device, when the airbag is swung due to rapid inflation and deployment, the inflation and deployment position of the airbag with respect to the corner portion of the console box is likely to be displaced, and therefore, there is a problem that it is difficult to suppress in time the movement of the passenger to the vehicle width direction inner side. For example, in the airbag described in patent document 2, there is room for improvement in terms of solving the above-described problems.

Disclosure of Invention

The present invention has been made in view of the above circumstances, and an object thereof is to provide a side airbag device capable of suppressing a passenger from moving inward in a vehicle width direction in time.

A side airbag device according to an aspect of the present invention is a side airbag device that inflates and deploys above a console box provided on an inner side of a vehicle seat in a vehicle width direction and that inflates and deploys laterally of a passenger seated in the vehicle seat, the side airbag device including: a gas generator that generates gas; and a bag-shaped airbag that is inflated and deployed by the gas to protect a side portion of the occupant when the inflator operates, the airbag including: a main body protection part which is expanded and unfolded at the side of the main body of the passenger; a support portion provided on the console box side of the main body protecting portion and pressed against an upper surface of the console box when inflated and deployed; and a lumbar protection portion that inflates and deploys between a lumbar portion of the occupant and a side portion of the console box, wherein the support portion and the lumbar protection portion are configured by continuous air chambers, the gas generator spans up and down of the support portion in a state viewed from a side of the vehicle, and the airbag is fixed to the side portion of the vehicle seat via the gas generator.

According to the present invention, it is possible to provide a side airbag device that can suppress in time the movement of an occupant toward the vehicle width direction inner side.

Drawings

Fig. 1 is a schematic view showing a state of a side airbag device according to an embodiment as viewed from a side before inflation and deployment of an airbag.

Fig. 2 is a schematic view showing a state of the side airbag device of the embodiment as viewed from the front before the airbag is inflated and deployed.

Fig. 3 is a schematic perspective view showing an example of the deployed state of the airbag in fig. 2.

Fig. 4 is a perspective view schematically showing an example of the deployed state of the airbag in fig. 2, which is different from fig. 3.

Fig. 5 is a schematic view showing a state of the side airbag device of the embodiment as viewed from the side at the initial stage of occupant restraint in which an occupant is restrained by an airbag.

Fig. 6 is a schematic view showing a state of the side airbag device of the embodiment as viewed from the front at the initial stage of occupant restraint in which an occupant is restrained by an airbag.

Fig. 7 is a schematic view showing a state of the side airbag device of the embodiment as viewed from the side at the later stage of occupant restraint in which an occupant is restrained by an airbag.

Fig. 8 is a schematic view showing a state of the side airbag device of the embodiment as viewed from the front at a rear stage of occupant restraint in which an occupant is restrained by an airbag.

Fig. 9 is a schematic view of a cross section of the side airbag device in fig. 7 and 8 viewed from above in the vicinity of the inflator.

(symbol description)

1 side airbag device

10 gas generator

10A, 10B bolt

20 air bag

20A passenger-side base fabric

20B passenger side base cloth

20C intermediate base fabric

20D base cloth

20P gas generator insertion opening

21 main body protection part

22 support part

23 waist protection part

24 head protector

30 vehicle seat

31 seat back support (chair back)

Passenger 40 (International Union side collision dummy)

41 main body

42 waist part

43 head

44 arm part

50 vehicle side wall

60 control box

Detailed Description

With regard to the side airbag device of the embodiment of the present invention, description will be made below with reference to the accompanying drawings.

Unless otherwise specified, directions in the present specification are all based on a vehicle, and for example, "front" indicates a forward direction of the vehicle, "rear" indicates a rearward direction of the vehicle, "upper" indicates an upward direction of the vehicle, and "side" indicates an inward direction in a vehicle width direction. Further, an arrow FR appropriately shown IN the drawings indicates a forward direction of the vehicle, an arrow UP indicates an upward direction of the vehicle, an arrow IN indicates an inner direction IN the vehicle width direction, and an arrow OUT indicates an outer direction IN the vehicle width direction. Further, the members disposed inside the vehicle seat are illustrated in a state where the vehicle seat is seen through.

(before expansion)

Fig. 1 is a schematic view showing a state of a side airbag device according to an embodiment as viewed from a side before inflation and deployment of an airbag. Fig. 2 is a schematic view showing a state of the side airbag device of the embodiment as viewed from the front before the airbag is inflated and deployed.

As shown in fig. 1 and 2, the side airbag device 1 is fixed to a side portion (a side portion on the inner side in the vehicle width direction) of a seatback (seat back portion) 31 of a vehicle seat 30.

The vehicle seat 30 is assumed to be, for example, a driver seat, a passenger seat, or the like of a vehicle.

The side airbag device 1 has a gas generator 10 and an airbag 20.

The gas generator 10 is provided inside the airbag 20. More specifically, the entirety of the gas generator 10 is provided inside the airbag 20. The gas generator 10 is a columnar (columnar) gas generating device, and is disposed along the extending direction (height direction) of the seatback 31. A pair of bolts 10A, 10B protrude from the upper and lower portions of the gas generator 10, and the pair of bolts 10A, 10B penetrate the airbag 20. The gas generator 10 is fixed to a side portion (e.g., a side frame) of the seat back 31 by the pair of bolts 10A, 10B as described above.

The gas generator 10 operates at the time of a side collision of the vehicle. Specifically, first, when a side collision of the vehicle is detected by a collision detection sensor mounted on the vehicle, an ECU (Electronic Control Unit) calculates a signal transmitted from the collision detection sensor to determine the level of the collision. If the determined collision level matches the state of inflating the airbag 20, the gas generator 10 is ignited to generate gas by a chemical reaction caused by combustion. As a result, the gas generated from the gas generator 10 is introduced into the airbag 20.

The type of the gas generator 10 is not particularly limited, and examples thereof include a pyrotechnic gas generator using gas generated by burning a gas generating agent, a gas storage gas generator using compressed gas, and a hybrid gas generator using a mixed gas of gas generated by burning a gas generating agent and compressed gas.

The airbag 20 houses the gas generator 10. The airbag 20 is fixed in a folded state before inflation and deployment to a side portion of the vehicle seat 30, here, a side portion of the seat back 31 via the inflator 10, and is housed while being covered with a skin of the seat back 31 together with a cushion pad.

Fig. 3 is a schematic perspective view showing an example of the deployed state of the airbag in fig. 2. As shown in fig. 3, the airbag 20 is bag-shaped. The airbag 20 is formed in a three-dimensional bag shape by joining the outer peripheries of a plurality of pieces of base cloth to each other. Specifically, in the airbag 20 shown in fig. 3, the outer peripheries of the non-occupant side base cloth 20A disposed on the vehicle width direction inner side, the occupant side base cloth 20B disposed on the vehicle width direction outer side, the intermediate base cloth 20C disposed on the vehicle front direction side and the vehicle rear direction side, and the base cloth 20D disposed on the vehicle upper direction side and the vehicle lower direction side are joined to each other. As will be understood from fig. 6 and 8 described later, the non-occupant side base cloth 20A is partially bent so as to follow the upper surface and the side surface of the console box 60. Further, the intermediate base fabric 20C has a shape along the upper surface and the side surfaces of the console box 60 in a state viewed from the vehicle front-rear direction.

In the airbag 20, it is preferable that the base cloth disposed on the vehicle front direction side of the base cloth disposed on the vehicle front direction side and the base cloth disposed on the vehicle rear direction side have a shape that is along the upper surface and the side surfaces of the console box 60 when viewed from the vehicle front-rear direction. Fig. 4 is a perspective view schematically showing an example of the deployed state of the airbag in fig. 2, which is different from fig. 3. In the airbag 20 shown in fig. 4, of the intermediate base cloths 20C disposed on the vehicle front direction side and the vehicle rear direction side, the base cloth disposed on the vehicle front direction side has a shape that is along the upper surface and the side surfaces of the console box 60 when viewed from the vehicle front-rear direction. According to the airbag 20 shown in fig. 4, the capacity of the airbag 20 can be reduced as compared with the airbag 20 shown in fig. 3.

The passenger-side base fabric 20B of the airbag 20 is provided with a gas generator insertion port 20P for inserting the gas generator 10 into the airbag 20. Fig. 3 and 4 illustrate a case where the gas generator insertion port 20P is slit-shaped. Since the bolt holes are provided in the vertical direction of the gas generator insertion port 20P, the pair of bolts 10A, 10B can be projected from the bolt holes to the outside of the airbag 20 after the entire gas generator 10 is inserted into the airbag 20 from the gas generator insertion port 20P. Then, the airbag 20 in the folded state is fixed to the side portion of the seatback 31 via the gas generator 10, so that the gas generator insertion port 20P faces the seatback 31. Thus, when the airbag 20 inflates and deploys, the gas generator insertion port 20P is closed by the seat back 31, and therefore gas leakage from the airbag 20 is prevented.

As the base fabric constituting the airbag 20, for example, a fabric woven from a yarn such as nylon 66 or polyethylene terephthalate can be used. The surface of the base fabric may be covered with an inorganic substance such as silicon in order to improve heat resistance, airtightness, and the like.

Examples of the method of joining the base cloth include sewing, bonding, welding, and a combination thereof.

In the present embodiment, an international unified Side Impact Dummy (World-SID: World Side Impact Dummy)40 is seated in the vehicle seat 30. Currently, the seating posture of the international unified side impact dummy 40 is determined by the side impact test method (ECE R95) adopted in japan and europe or the side impact test method (FMVSS214) adopted in the united states. The position and size of the airbag 20 at the time of inflation and deployment (hereinafter, also simply referred to as the time of inflation and deployment) are set in accordance with the positions of the body 41, the waist portion 42, the head 43, the arm portion 44, and the like of the international unified side impact dummy 40 shown in fig. 1. Hereinafter, the international unified side impact dummy 40 is referred to as a "passenger 40".

The vehicle side wall 50 is not particularly limited as long as it is a vehicle body portion located on the vehicle width direction outer side (the opposite side of the console box 60) of the passenger 40 seated in the vehicle seat 30, and is a generic name of a side door, a pillar, a side window, and the like.

The console box 60 is provided on the vehicle width direction inner side of the vehicle seat 30. For example, the console box 60 is provided between the driver's seat and the passenger seat at the vehicle width direction center portion in the vehicle. The console box 60 may also function as an armrest portion (armrest portion) of the arm portion 44 that supports the vehicle transverse direction inner side of the passenger 40.

(initial restraint of passenger)

Fig. 5 is a schematic view showing a state of the side airbag device of the embodiment as viewed from the side at the initial stage of occupant restraint in which an occupant is restrained by an airbag. Fig. 6 is a schematic view showing a state of the side airbag device of the embodiment as viewed from the front at the initial stage of occupant restraint in which an occupant is restrained by an airbag.

When a vehicle collides with an obstacle (for example, another vehicle) on the side, specifically, when a vehicle side wall (a vehicle body portion located on the vehicle width direction outer side of the passenger seat when the vehicle seat 30 is the driver seat) opposed to the vehicle side wall 50 in the vehicle width direction collides with the obstacle and the gas generator 10 is operated, the gas generated in the gas generator 10 is introduced into the airbag 20, and the airbag 20 inflates while the above-described folding is released. When the skin of the seat back 31 is ruptured by the force applied from the inflated airbag 20, as shown in fig. 5 and 6, the airbag 20 inflates and deploys above the console box 60 and to the side of the passenger 40 seated in the vehicle seat 30, thereby protecting the side portion of the passenger 40. The balloon 20 inflated and deployed as described above is also referred to as a distal-side balloon.

At the time of a side collision of the vehicle, the passenger 40 seated in the vehicle seat 30 tilts while moving inward in the vehicle width direction about the waist portion 42. On the other hand, at the time of a side collision of the vehicle, the airbag 20 inflates and deploys to have the main body protecting portion 21, the support portion 22, and the waist portion protecting portion 23. When the airbag 20 inflates and deploys, the main body protecting portion 21 inflates and deploys on the side of the main body 41 of the occupant 40 and contacts the main body 41. The support portion 22 is a portion provided on the console box 60 side of the main body protecting portion 21, and is expanded and expanded so as to contact the upper surface of the console box 60. The lumbar protection portion 23 is inflated and deployed between the lumbar portion 42 of the passenger 40 and the side portion of the console box 60.

The support portion 22 and the lumbar protection portion 23 preferably follow the upper surface and the side surfaces of the console box 60 when viewed from the vehicle front-rear direction at the time of inflation and deployment. For example, in the airbag 20 shown in fig. 6, since the intermediate base cloth 20C has a shape along the upper surface and the side surfaces of the console box 60 in a state viewed from the vehicle front-rear direction, the support portions 22 inflate and deploy while coming into contact along the upper surface of the console box 60. Further, the lumbar protection portion 23 is inflated and expanded while being in contact along the side surface of the console box 60 in a state viewed from the vehicle front-rear direction.

The support portion 22 and the waist protecting portion 23 are constituted by continuous air chambers. The fact that each portion of the airbag 20 (here, the support portion 22 and the lumbar region protecting portion 23) is formed of a continuous air chamber means that no partition wall that partitions the air chamber is provided at the boundary between each portion of the airbag 20, and the airbag is not formed of a plurality of bags. Since the support portion 22 and the waist protecting portion 23 are formed of continuous air cells, it is possible to prevent the movement such as twisting from occurring between the support portion 22 and the waist protecting portion 23, as compared with the case where the waist protecting portion 23 is provided by joining bag-like sub-air cells, for example. As a result, the airbag 20 can be rapidly inflated and deployed at the support portion 22 and the waist protecting portion 23, and the occupant 40 can be restrained as early as possible.

(late restraint for passenger)

Fig. 7 is a schematic view showing a state of the side airbag device of the embodiment as viewed from the side at the later stage of occupant restraint in which an occupant is restrained by an airbag. Fig. 8 is a schematic view showing a state of the side airbag device of the embodiment as viewed from the front at a rear stage of occupant restraint in which an occupant is restrained by an airbag. Fig. 9 is a schematic view of a cross section of the side airbag device in fig. 7 and 8 viewed from above in the vicinity of the inflator.

When the passenger 40 further moves inward in the vehicle width direction, the lumbar protection portion 23 is crushed between the lumbar portion 42 of the passenger 40 and the side portion of the console box 60, as shown in fig. 8. Since the waist protecting portion 23 is crushed, the internal pressure of the supporting portion 22 constituted by the air cells continuous with the waist protecting portion 23 rises. Since the support portion 22 and the waist protecting portion 23 are constituted by continuous air chambers, the inner pressure of the support portion 22 is easily increased because the waist protecting portion 23 is crushed.

On the other hand, the body protecting portion 21 is inclined inward in the vehicle width direction by coming into contact with the body 41 of the occupant 40 inclined inward in the vehicle width direction. When the body protecting portion 21 is inclined inward in the vehicle width direction, the support portion 22 is immediately pressed against the upper surface of the console box 60, and therefore a reaction force is generated from the upper surface of the console box 60. At this time, as described above, the internal pressure of the support portion 22 increases, and therefore the reaction force from the upper surface of the console box 60 increases. Therefore, when the large reaction force is applied to the main body protecting portion 21 via the supporting portion 22, a force that attempts to return the main body protecting portion 21 to the position at the initial stage of occupant restraint (the vehicle width direction outer side) acts largely, and as a result, the movement of the occupant 40 toward the vehicle width direction inner side is suppressed in time.

Further, as described above, since the support portion 22 and the lumbar region protecting portion 23 are inflated and deployed along the upper surface and the side surfaces of the console box 60 in the state viewed from the vehicle front-rear direction, the airbag 20 does not pivot about the corner portion of the console box 60, and the deployment operation of the airbag 20 is stabilized. The above-described stabilization of the deployment operation of the airbag 20 also contributes to promptly suppressing the movement of the occupant 40 toward the vehicle width direction inner side.

The portions of the support portion 22 and the lumbar protective portion 23 which are opposed to the upper surface and the side surface of the console box 60 when inflated and deployed are preferably constituted by a continuous single base cloth. For example, in the airbag 20 shown in fig. 3 and 4, the portions of the support portion 22 and the lumbar protective portion 23 that oppose the upper surface and the side surface of the console box 60 at the time of inflation and deployment are constituted by a single continuous base cloth 20A. In this way, by making the portions of the support portion 22 and the lumbar protecting portion 23 which face the upper surface and the side surfaces of the console box 60 at the time of inflation and deployment be constituted by a single continuous base cloth, the airbag 20 is inflated and deployed so as to become round with an increased inflation diameter at the portions of the support portion 22 and the lumbar protecting portion 23 which face the upper surface and the side surfaces of the console box 60. Therefore, the reaction force from the upper surface and the side surface of the console box 60 during inflation and deployment becomes larger, and as a result, the restraining force of the airbag 20 (main body protecting portion 21) that restrains the occupant 40 from moving toward the vehicle width direction inner side becomes larger. Further, by inflating and deploying the airbag 20 as described above, the support portion 22 and the lumbar protection portion 23 can be brought into contact with the console box 60 as soon as possible.

The support portion 22 is preferably pressed to at least half of the upper surface of the console box 60 when inflated and deployed in a state seen from the vehicle front-rear direction, and more preferably pressed to the entire upper surface of the console box 60 as shown in fig. 8. By pressing the support portion 22 to more than half of the upper surface of the console box 60 at the time of inflation and deployment, the reaction force from the upper surface of the console box 60 can be further increased, and as a result, the restraining force of the airbag 20 (main body protecting portion 21) that restrains the passenger 40 from moving toward the vehicle width direction inner side can be further increased.

Preferably, the main body protecting portion 21, the support portion 22, and the waist portion protecting portion 23 are formed of continuous air chambers as shown in fig. 8, and between the upper end portion of the main body protecting portion 21 and the end portion of the support portion 22 on the inner side in the vehicle width direction, as shown in fig. 8, there is no concave portion when inflated and expanded in a state seen from the vehicle front-rear direction. Since the airbag 20 has the above-described structure, it can be prevented from bending between the body protecting portion 22 and the supporting portion 22 when receiving the passenger 40. As a result, the airbag 20 can stably receive the passenger 40.

As shown in fig. 8, the airbag 20 may further include a head protection portion 24. The head protection portion 24 is provided above the main body protection portion 21, and protects the head 43 of the passenger 40. Since the airbag 20 has the head protection portion 24, the occupant 40 can be received as a whole. As a result, the movement of the occupant 40 toward the vehicle width direction inner side can be effectively suppressed by the airbag 20.

The gas generator 10 is incorporated in the airbag 20, and as shown in fig. 8, in a state seen from the side of the vehicle, spans the upper and lower sides of the support portion 22, more specifically, spans the main body protecting portion 21 and the waist portion protecting portion 23. Further, the pair of bolts 10A, 10B of the gas generator 10 are located above and below the support portion 22, respectively. Therefore, when the airbag 20 is inflated and deployed by the gas generated in the gas generator 10, the gas generation position and the support portion 22 are relatively close to each other, so that the gas pressure in the vicinity of the support portion 22 during inflation and deployment of the airbag 20 is kept high, and the independence of the airbag 20 can be ensured by the support portion 22. Therefore, even if the airbag 20 swings due to rapid inflation and deployment, the main body protecting portion 21, the supporting portion 22, and the waist protecting portion 23 are less likely to swing. As a result, the position of the airbag 20 at which it inflates and deploys with respect to the corner of the console box 60 is less likely to shift, and the deployment operation of the airbag 20 is stabilized, so that the movement of the occupant 40 to the vehicle width direction inner side can be suppressed in time.

As shown in fig. 9, the airbag 20 is fixed to a side portion of the vehicle seat 30, in this case, a side portion of the seatback 31, via the inflator 10. By fixing the gas generator 10 and the airbag 20 as described above, the main body protecting portion 21, the support portion 22, and the lumbar protecting portion 23 are fixed to the side portion of the vehicle seat 30, here, the side portion of the seatback 31, via the gas generator 10. Thus, at the time of inflation and deployment of the airbag 20, the swing of the support portion 22 close to the fixed gas generator 10 is further restricted. As a result, the position of the airbag 20 at which it inflates and deploys with respect to the corner of the console box 60 is less likely to shift, and the deployment operation of the airbag 20 is stabilized, so that the movement of the occupant 40 to the vehicle width direction inner side can be suppressed in time.

On the other hand, when the airbag 20 blocks the occupant 40 moving toward the vehicle width direction inner side, the lumbar protection portion 23 inflated and deployed between the lumbar portion 42 of the occupant 40 and the side portion of the console box 60 may be pulled out from its position. In contrast, by fixing the lumbar protection portion 23 to the side portion of the vehicle seat 30, in this case, the side portion of the seat back 31, as described above, the lumbar protection portion 23 is less likely to be pulled out, and therefore the lumbar protection portion 23 can stably protect the lumbar 42 of the occupant 40.

The airbag 20 that is inflated and deployed by the gas generated from the gas generator 10 inflates so as to round its shape as much as possible due to the internal pressure. Therefore, in the airbag 20, as shown in fig. 9, the intermediate base fabric 20C is present on the vehicle front direction side, so that the position where the thickness in the vehicle width direction is maximum at the time of inflation and deployment is located on the vehicle front direction side. This makes it possible to protect the occupant 40 more stably so as to surround the occupant 40 between the seat back 31 and the position where the thickness of the airbag 20 in the vehicle width direction is the largest.

As other components of the side airbag device 1, the same components as those of a conventionally known side airbag device can be appropriately used.

The present invention is not limited to the contents described in the above embodiments. The respective configurations described in the embodiments may be appropriately deleted, added, changed, and combined without departing from the scope of the present invention.

For example, although the above embodiment has described the case where the gas generator 10 is operated when an obstacle collides with a vehicle side wall that faces the vehicle side wall 50 in the vehicle width direction, the gas generator 10 may be operated when an obstacle collides with the vehicle side wall 50. In this case, when the passenger 40 moves to the vehicle width direction inner side due to a backswing or the like after the passenger 40 is restrained by the side airbag that is inflated and deployed at the vehicle width direction outer side of the passenger 40 seated in the vehicle seat 30, the passenger 40 can be restrained in time by the airbag 20.