DE102020100381A1 - SIDE IMPACT AIRBAG DEVICE - Google Patents

Abstract

A side impact airbag device has an airbag (40). The airbag (40) has an airbag main body (41), a first outer tether (81) and a second outer tether (82). The first outer tether (81) and the second outer second tether (82) are tightened between the airbag main body (41) and the vehicle occupant. A first end of the first outer tether (81) and a first end of the second outer tether (82) are attached to a fixation area (46) on which the airbag main body (41) is fixed to the conveyance. A second end of the first outer tether (81) is attached to a portion of the airbag main body (41) that contacts the shoulder area of the vehicle occupant. A second end of the second outer tether (82) is attached to a front end of the airbag main body (41). The airbag main body (41) has a first inflation thickness restriction area (49, 86) that restricts the inflation thickness of a portion to which the second end of the first outer tether strap (81) is attached and a second inflation thickness restriction area (50) that defines the inflation thickness one second section between the first inflation thickness restriction area (49, 86) and the fixation area (46). The inflation thickness of the second portion between the first inflation thickness restriction area (49, 86) and the second inflation thickness restriction area (50) is set to be larger than the inflation thickness of the second portion between the second inflation thickness restriction area (50) and the fixing area (46).

Description

BACKGROUND

Technical field

The present disclosure relates to a side impact airbag device that deploys and inflates an airbag between adjacent seats of a vehicle, such as a vehicle, when an impact is applied to a side wall of the vehicle to thereby engage the airbag with the vehicle occupant seated on the seat seated on the far side of the side wall to which the impact was applied to protect the vehicle occupant from the impact.

State of the art

Some vehicles having two or more vehicle seats arranged in the vehicle width direction are equipped with a side impact airbag device. A side impact airbag device has an airbag having an airbag main body and a gas generator disposed inside the airbag main body, and is installed in the side portion of a vehicle seat that is closer to the adjacent vehicle seat on the side. The gas generator is arranged in the rear lower part of the airbag main body and is fixed to the vehicle seat together with the airbag main body.

When a side impact is applied to a side wall, such as a side door, the gas generator emits fill gas. The inflation gas causes the airbag main body to protrude from the side of the vehicle seat, so that the airbag main body is deployed and inflated diagonally forward and upward between the adjacent vehicle seats. If a vehicle occupant sits in the vehicle seat on the far side of the side wall to which the impact was applied, the upper body of the vehicle occupant tends to fall toward the side wall to which the impact was applied due to inertia. Then, the airbag main body picks up the upper body to protect it from the impact.

In the side impact airbag device described above, it is important to deploy and inflate the airbag main body within a predetermined deployment range to protect the vehicle occupant from the impact.

However, since the airbag main body is only fixed to the rear lower part, the pulse of deployment and inflation of the airbag main body diagonally forward and upward causes the airbag main body to tend to rotate in the front-back direction in a rotating manner Part to fall on which the airbag main body is fixed to the vehicle seat. This can cause the airbag main body to protrude forward or backward from the deployment area.

To solve this problem, the technology provided in the Japanese Patent No. 6,327,110 discloses a side impact airbag device having an upper belt portion and a lower belt portion. The belt portions are pulled taut by the airbag main body, which is deployed and inflated, so that unnecessary movements in the front-back direction of the airbag main body are restricted.

The publication described above improves the performance in protecting a vehicle occupant from an impact by deploying and inflating the airbag main body in a predetermined deployment area.

However, the publication described above does not specifically disclose an improvement in performance in picking up the body of a vehicle occupant with an airbag main body when the body of the vehicle occupant tends to fall toward the side wall to which an impact has been applied.

SUMMARY

It is an object of the present disclosure to provide a side impact airbag device that can further improve the performance of protecting a vehicle occupant from an impact by reducing unnecessary movements of an airbag main body.

This summary is intended to present a selection of concepts in a simplified form, which are further described below in the detailed description. This summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

To achieve the above object, a side impact airbag device is provided which has an airbag. The airbag has an airbag main body. The airbag main body has a rear lower part in which a fixing area is defined. The airbag main body is configured to be fixed to a transportation means at the fixing area has a plurality of conveyance seats arranged in a width direction. The side impact airbag device is configured to deploy and inflate an airbag main body diagonally upward and forward from the fixation area between adjacent seats of the vehicle seats by means of a fill gas that is supplied in response to a side impact applied to a side wall of the vehicle to protect a vehicle occupant seated in the vehicle seat on the far side from the side wall against the impact. The airbag further includes a first outer tether and a second outer tether that become taut between the airbag main body and the vehicle occupant when the airbag main body is deployed and inflated. A first end of the first outer tether and a first end of the second outer tether are attached to the fixation area. A second end of the first outer tether is attached to a portion of the airbag main body that contacts the shoulder area of the vehicle occupant. A second end of the second outer tether is attached to a front end of the airbag main body. The airbag main body has a first inflation thickness restriction area that restricts an inflation thickness of a portion to which the second end of the first outer tether is attached, and a second inflation thickness restriction area that restricts an inflation thickness of a portion between the first inflation thickness restriction area and the fixing area. An inflation thickness of a portion between the first inflation thickness restriction area and the second inflation thickness restriction area is set to be larger than an inflation thickness of a portion between the second inflation thickness restriction area and the fixing area.

With this configuration, when a side impact is applied to the side wall of the vehicle due to a side collision, the body of the vehicle occupant tends to move toward the side wall on which the impact was caused due to inertia. Meanwhile, the inflation gas is supplied to the airbag main body, so that the airbag main body is deployed and inflated between the conveyance seats which are adjacent to each other. The airbag main body, which is deployed and inflated, pulls each of the first outer tether and the second outer tether. The second outer tether is pulled taut between the first end attached to the fixing portion of the airbag main body and the second end attached to the front end of the airbag main body.

Thus, when the airbag main body, which is fixed to the conveyance at the fixing area defined in the rear lower part, is deployed diagonally forward and upward and inflated, the airbag main body tries to rotate rearward around the fixing area. Such rotation is restricted by the second outer tether in a taut condition. This restricts the airbag main body from falling backward.

The first outer tether is pulled taut between the first end attached to the fixation area and the second end attached to the portion of the airbag main body that contacts the shoulder area of the vehicle occupant. The area of the airbag main body between the first inflation thickness restriction area and the second inflation thickness restriction area is inflated in the width direction of the vehicle to a greater extent than the area between the second inflation thickness restriction area and the fixing area, and pushes the first outer tether toward the vehicle occupant. The airbag main body receives a tensile stress through the first outer tether, which tries to pull the airbag main body in the direction of the fixing area. At this time, a part located between the first inflation restriction area and the second inflation restriction area and in the vicinity of the first inflation restriction area receives tension in a direction along the curved inflated area, which in this case, tension in a rearward direction Direction of the vehicle occupant (direction diagonally backwards towards the vehicle occupant). A component force acting in the width direction of the vehicle and directed toward the vehicle occupant is generated in the part of the airbag main body that is between the first inflation restriction area and the second inflation restriction area and in the vicinity of the first inflation restriction area. This component force acts as an opposing force that cancels the external force received by the airbag main body from the body of the vehicle occupant, which tends to move toward the side wall to which the impact was applied. As a result, the airbag main body resists movement even when it receives an external force from the vehicle occupant, and thus restricts movement of the vehicle occupant's body toward the side wall to which the impact was applied.

As described above, the area between the first inflation thickness restriction area and the second inflation thickness restriction area is inflated with a larger inflation thickness. This area is closer to the fixing area than the portion of the airbag main body that contacts the shoulder area of the vehicle occupant. This restricts the interference between the part of the upper body of the vehicle occupant that has the largest dimension in the width direction, which is the shoulder area, and the above-described area of the airbag main body, which is inflated heavily in the width direction of the vehicle.

In the side impact airbag device described above, a length of the first outer tether between the first end and the second end is preferably set to be shorter than a circumferential length of the airbag main body between the fixing portion and a portion to which the second end of the first outer tether is attached . A length of the second outer tether between the first end and the second end is preferably set to be shorter than a circumferential length of the airbag main body between the fixing portion and the front end to which the second end of the second outer tether is attached.

When the length of the first outer tether is set to meet the above-described condition regarding the circumferential lengths of the airbag main body, the first outer tether is pulled by the airbag main body, which is deployed and inflated, so that it is taut between the first end and the second end is.

When the length of the second outer tether is set to meet the above-described condition regarding the circumferential lengths of the airbag main body, the second outer tether is pulled by the airbag main body, which is deployed and inflated, so that it is taut between the first end and the second end is.

In the side impact airbag device described above, the airbag main body preferably has a vehicle occupant-side cloth area that is closer to the vehicle occupant and an opposite-side cloth area that is more distant from the vehicle occupant. The first inflation thickness restriction area connects the vehicle occupant-side cloth area and the opposite-side cloth area to each other while bringing the cloth areas into contact with each other. The second end of the first outer tether is connected to the vehicle occupant-side cloth area through the first inflation thickness restriction area.

With this configuration, the vehicle occupant-side cloth area and the opposite-side cloth area of the airbag main body are brought into contact so that the distance between the cloth areas is minimized to a portion where the first inflation thickness restriction area is provided.

Since the first inflation thickness restriction section is provided, the vehicle occupant-side cloth section and the opposite-side cloth section are connected to each other at the same time when the second end of the first outer tether and the airbag main body are connected to each other. This reduces the number of manufacturing steps compared to a case in which these connection processes are carried out separately.

In the side impact airbag device described above, the airbag main body preferably has a vehicle occupant-side cloth area that is closer to the vehicle occupant and an opposite-side cloth area that is more distant from the vehicle occupant. The first inflation thickness restriction area is configured by an inner tether that is disposed in the airbag main body and bridges between the vehicle occupant-side cloth area and the opposite-side cloth area. One end of the inner tether belt closer to the vehicle occupant-side cloth area and the second end of the first outer tether belt are connected to the vehicle occupant-side cloth area by a common connection area.

With this configuration, the inner tether is pulled toward the opposite sides in the width direction of the vehicle so that it is taut when the airbag main body is deployed and inflated. In the portion where the inner tether straps, the inflating thickness of the airbag main body is restricted by the inner tether in the taut state.

The inner tether and the second end of the first outer tether are each connected to the vehicle occupant-side cloth area through the common connection area. This reduces the number of manufacturing steps compared to a case in which these connection processes are carried out by different connection areas.

In the side impact airbag device described above, the airbag main body has preferably a cloth area on the vehicle occupant side, which is closer to the vehicle occupant, and an opposite cloth area, which is located further away from the vehicle occupant. A first inner tether is disposed in the airbag main body and above the first inflation thickness restriction area. Opposing ends in a vertical direction of the first inner tether are connected to vertically separate sections in the opposite side of the cloth area. A middle portion in the vertical direction of the first inner tether is connected to the vehicle occupant-side cloth portion. A circumferential length of the opposite cloth portion between a portion to which an upper end of the first inner tether is connected and a portion to which a lower end of the first inner tether is connected is set to be longer than a circumferential length in the vertical direction of the vehicle occupant-side cloth region is at a section to which the central region of the first inner tether belt is connected.

With this configuration, when a part of the first inflation thickness restriction area or an upper part in the airbag main body is deployed and inflated by the inflating gas supplied, the first inner tether is tightened so that the inflation thickness of the upper part is restricted in the width direction of the vehicle.

Based on the positions at which the first inner tether is connected to the vehicle occupant-side cloth area and the opposite-side cloth area, the circumferential lengths of the vehicle-occupant-side cloth area and the circumferential lengths of the opposite-side cloth area are determined so that they meet the condition described above. Thus, a part of the airbag main body is bent (inclined) above the first inner tether or an upper part at the portion to which the first inner tether is connected to the vehicle occupant-side cloth portion, so that the upper part progressively faces the vehicle occupant toward the upper end approximates. The upper portion approaches the head of the vehicle occupant to further restrict movement of the head toward the side wall to which the impact was applied.

Other features and aspects will be apparent from the following detailed description, the drawings, and the claims.

Figure list

• 1 10 is a partial top view of a vehicle equipped with a vehicle side impact airbag device according to an embodiment.
• 2nd 10 is a cross-sectional view when viewed from the front of the vehicle and illustrates the positional relationship of the vehicle seats, the airbag, the vehicle occupant, the center console, and the side wall of the embodiment.
• 3rd 14 is a cross-sectional plan view partially showing the inner structure of a side portion of the backrest in which an airbag module is installed in the embodiment.
• 4th 10 is a side view of the vehicle seat in which the side impact airbag device according to the embodiment is installed.
• 5 10 is a side view when viewed from the opposite side of the vehicle occupant, and shows the airbag module with the airbag main body in an uninflated and spread out state in the embodiment.
• 6 10 is a cross-sectional view of the internal structure of the airbag module shown in 5 is shown.
• 7 10 is an expanded view of the airbag module of the embodiment.
• 8th 10 is a side view when viewed from the vehicle occupant side, and shows the airbag module with the airbag main body in an uninflated and expanded state of the embodiment.
• 9 Fig. 3 is an enlarged partial side view of a portion X of Fig 8th .
• 10th 10 is a partial cross-sectional view taken along line 10-10 in FIG 5 .
• 11 FIG. 10 is a partial cross-sectional view of the airbag main body of FIG 10th in an inflated state.
• 12th Fig. 12 is a partial cross-sectional view of the upper part of the airbag main body of the embodiment in an expanded and inflated state.
• 13 is a partial cross-sectional view corresponding to FIG 10th and shows a side impact airbag device according to a modification.

Throughout the drawings and the detailed description, the same reference numbers refer to the same elements. The drawings do not have to be to scale and the Relative size, proportions, and representation of elements in the drawings may be exaggerated for the sake of clarity, representation, and simplification.

DETAILED DESCRIPTION

This description provides a thorough understanding of the methods, devices and / or systems described. Modifications and equivalents of the described methods, devices and / or systems are obvious to the person skilled in the art. Sequences of events are exemplary and can be changed, as will be apparent to those skilled in the art, with the exception of events which necessarily take place in a specific order. Descriptions of functions and constructions known to those skilled in the art are omitted.

Exemplary embodiments can have different shapes and are not limited to the examples described. However, the examples described are thorough and complete, and convey the full scope of the disclosure to those skilled in the art.

A vehicle side impact airbag device according to an embodiment will now be described with reference to FIG 1 to 12th described.

In the following description, the direction in which the vehicle travels forward is referred to as the front, and the reverse direction is referred to as the rear. The vertical direction refers to the vertical direction of the vehicle, and the left-right direction refers to the vehicle width direction that matches the left-right direction when the vehicle is driving forward. In the vehicle width direction, the side closer to a vehicle occupant is referred to as a vehicle occupant side, while the side further away from the vehicle occupant is referred to as a side opposite to the vehicle occupant or an opposite side. It is believed that a vehicle occupant who is a size equivalent to a crash test dummy is seated in a normal position in a vehicle seat.

As in 1 shown are the sides in the vehicle width direction of a vehicle which is a vehicle 10th in the present embodiment, by side walls 11 , 12th formed which contain doors and columns. Transportation front seats, which two vehicle seats 13 , 14 in the present embodiment are side by side in the vehicle width direction in the passenger compartment of the vehicle 10th arranged. The vehicle seat 13 on the side closer to the side wall 11 serves as a driver's seat in which a vehicle occupant (driver) P1 sits. The vehicle seat 14 on the side closer to the side wall 12th serves as a passenger seat in which a vehicle occupant P2 sits. There is a center console in the passenger compartment 15 between the vehicle seats 13 , 14 arranged. The vehicle seats 13 , 14 have similar structures. Therefore, only the vehicle seat is used in this description 13 described and the representation of the vehicle seat 14 is omitted. This also applies to the side impact airbag devices that are in the respective vehicle seats 13 , 14 are installed.

As in 2nd and 4th shown, the vehicle seat 13 a seat cushion 16 , a backrest 17th and a headrest 18th on. The backrest 17th extends upward from the back of the seat cushion 16 and is configured to adjust the angle of the backrest 17th is adjustable. The headrest 18th is on the top of the backrest 17th arranged.

The internal structure of the backrest 17th of the vehicle seat 13 will now be described. Specifically, the inner structure of the side area on the side becomes closer to the adjacent vehicle seat 14 described.

The backrest 17th includes a seat frame, which forms a framework. As in 3rd shown, part of the seat frame forms a side frame area 21 . The side frame area 21 is located in the side area of the backrest 17th on the side closer to the adjacent vehicle seat 14 is. The side frame area 21 is formed by bending a metal plate.

A seat cushion 22 , which is made of an elastic material such as urethane foam, is provided on the front of the seat frame, which is the side frame area 21 having. There is also a back plate 23 , which is made of plastic, for example, arranged on the back of the side frame. Although the seat cushion 22 is covered with a cover, the cover is in 3rd not shown.

The seat cushion 22 has a stowage area 24th on the side closer to the adjacent vehicle seat 14 than the side frame area 21 on. The stowage area 24th stows an airbag module ABM which forms a main part of the side impact airbag device.

A slit 25th extends from the front corner of the stowage area 24th that are closer to the adjacent vehicle seat 14 is. The slot 25th extends diagonally forward towards the vehicle seat 14 . The seat cushion 22 assigns one breakable area 26 on which is in a section between the slot 25th and a front corner 22c located closer to the vehicle seat 14 is (the point in the long dash double dash line in 3rd is surrounded). The breakable area 26 is designed through an airbag 40 to be broken up.

As in 3rd , 5 and 6 shown, the airbag module ABM as its main components a gas generator 30th and the airbag 40 on. Each of these components will now be described.

<Gas generator 30>

The gas generator 30th assigns a generator 31 and a bracket 32 on. The generator 31 is substantially columnar and houses a gas generant (not shown) which is a fill gas G1 generated. The generator 31 has a gas outlet 31a at the top end. A wiring harness (not shown), which is a wiring for applying activation signals to the generator 31 is with the lower end of the generator 31 connected.

The bracket 32 acts as an atomizer for controlling the direction of the filling gas discharged G1 and also has a function of fixing the generator 31 on the seat frame 21 together with the airbag 40 and an inner tube 60 on. Most of the bracket 32 is formed by bending a plate, such as a metal plate, into a substantially cylindrical shape.

One or more bolts 33 which extend towards the vehicle occupant (the driver's seat) are on the bracket 32 fixed. Bolts 33 are arranged in vertically separate (separated) positions and are used as components for attaching the holder 32 on the side frame area 21 used.

<Airbag 40>

As in 6 shown, the airbag 40 an airbag main body 41 , a first inflation thickness restriction area, a second inflation thickness restriction area 50 , an inner tube 60 , a first inner tether 70 , a first outer tether 81 and a second outer tether 82 on.

<Airbag main body 41>

5 , 6 and 8th show the airbag module ABM with the airbag main body 41 in a flat, uninflated and expanded state without the fill gas G1 to be filled. 5 provides the airbag module ABM seen from the opposite side (the passenger seat side). 8th provides the airbag module ABM seen from the vehicle occupant side (the driver's seat side). 6 shows the airbag module ABM , in which the airbag main body 41 from 5 is cut open at the central area in the vehicle width direction. 7 provides the airbag module ABM in an unfolded state.

As in 7 shown, the airbag main body 41 the outer shell of the airbag 40 . The airbag main body 41 is by folding a single piece of cloth (also referred to as a base cloth or a cloth panel) half along a fold line 42 , which is defined as the center so as to overlap with itself in the vehicle width direction, and connecting the stacked parts (a pair of cloth portions) to each other to form a bag shape. To distinguish the two overlapping cloth areas of the airbag main body 41 becomes the area of cloth that is closer to the vehicle occupant on the side P1 is located as a cloth area on the vehicle occupant side 43 designated, and the cloth area, which is on the side further away from the vehicle occupant P1 is located as an opposite side of the cloth area 44 designated.

As in 2nd and 4th shown are the shapes and sizes of the vehicle occupant-side cloth area 43 and the opposite side of the cloth 44 set such that the airbag main body 41 next to a large part of the upper body of the vehicle occupant P1 , specifically the area from the chest PT to the head PH is enough, unfolded and inflated. If the airbag main body 41 is deployed and inflated, the lower end of the airbag main body is 41 below the lower end of the center console 15 (please refer 2nd ).

The vehicle occupant-side cloth area 43 and the opposite cloth area 44 are preferably formed from a high strength material that is flexible to allow folding and resists expansion. For example, the material can be a woven cloth made of polyester threads or polyamide threads.

As in 5 and 7 shown are the vehicle occupant-side cloth area 43 and the opposite cloth area 44 at a peripheral connection area 45 that runs along the perimeter of the cloth areas 43 , 44 is provided connected. The perimeter connection area 45 is by sewing (with sewing threads) parts of the circumference of the vehicle occupant area of the cloth 43 and the opposite side of the cloth 44 except for the rear end (the part in the Environment of the fold line 42 ) educated. This configuration applies to different types of connection areas 49 , 52 , 53 , 54 , 64 , 65 , 72 , 74 , 76 , 77 , 78 , 88 , 89 , 91 , which are described below.

First to third types of lines represent sewn areas in 5 to 9 The first type of line has thick line segments of a certain length which are arranged intermittently and represents sewing threads when viewed from the side (see the peripheral connection area 45 in 5 ). The second type of line has thin line segments of a certain length (longer than those in a typical dash line), which are arranged intermittently, and represents the state of sewing threads that are, for example, behind a piece of cloth and cannot be seen directly or are hidden (see the connection area 54 in 5 ). The third type of line has dots arranged at predetermined intervals and represents the cross section of sewing threads on a plane along the sewn areas (see the peripheral connection area 45 in 6 ).

The perimeter connection area 45 may be formed by a method other than sewing using sewing threads, but may be formed by using adhesive, for example. Such a modification is in each of the connection areas described above 49 , 52 , 53 , 54 , 64 , 65 , 72 , 74 , 76 , 77 , 78 , 88 , 89 , 91 applicable.

The space between the vehicle occupant-side cloth area 43 and the opposite cloth area 44 passing through the perimeter connection area 45 and the fold line 42 surrounded serves as an inflation area which is filled by the filling gas G1 is unfolded and inflated.

The rear lower part of the airbag main body described above 41 serves as a fixation area 46 which on the side frame area 21 is fixed. As in 5 and 6 shown, the airbag main body 41 an insertion opening 47 for the gas generator 30th at the rear lower end.

<First inflation thickness restriction area>

The first inflation thickness restriction area is in a part of the airbag main body 41 provided the shoulder area PS of the vehicle occupant P1 touches and limits the inflation thickness of the airbag main body 41 in this part. This is the part on which a second end of the first outer tether 81 which is the front upper end is attached. The first inflation thickness restriction area is through the connection area 49 formed which the vehicle occupant-side cloth area 43 with the opposite cloth area 44 connects while he the cloth areas 43 and 44 in contact with each other. The connection area 49 is inclined so that it is higher towards the rear end. At the part where the connection area 49 is provided, the distance between the vehicle occupant-side cloth area 43 and the opposite cloth area 44 minimized (zero).

<Second Inflation Thickness Restriction Area>

As in 6 , 7 and 10th shown is the second inflation thickness restriction area 50 arranged at a section diagonally above and at the front of the gas generator 30th is. The second inflation restriction area 50 is located between the connection area 49 and the fixation area 46 and limits the inflation thickness of the airbag main body 41 in the area between the connection area 49 and the fixation area 46 a. The second inflation restriction area 50 has two band-shaped cloth areas 51 which are made of the same material as the airbag main body 41 and are independent of each other.

The cloth area 51 on the vehicle occupant side (the driver seat side) is with the vehicle occupant-side cloth area 43 which to this cloth area 51 is adjacent, through the connection area 52 connected. The connection area 52 extends substantially vertically along the rear edge of the cloth area 51 on the vehicle occupant side (the driver seat side). Opposing ends of the connection area 52 cross with the perimeter connection area 45 . The cloth area is similar 51 on the opposite side (the passenger seat side) with the opposite cloth area 44 which to this cloth area 51 is adjacent, through the connection area 53 connected. The connection area 53 extends substantially vertically along the rear edge of the cloth area 51 on the opposite side (the passenger seat side). The opposite ends of the connection area 53 cross with the perimeter connection area 45 . The cloth areas 51 are connected by a connection area 54 connected, which extends substantially vertically along the front edges. The opposite ends of the connection area 54 are from the perimeter connection area 45 Cut.

With these connection structures, the second inflation range restriction area is bridged 50 between the vehicle occupant-side cloth area 43 and the opposite cloth area 44 . In the second inflation restriction area 50 overlap if the Airbag main body 41 in the uninflated and expanded state, the cloth areas 51 with each other in the vehicle width direction (see 10th ). Likewise, the second inflation restriction area 50 pulled tight when the airbag main body 41 is deployed and inflated, causing the inflation thickness in the vehicle width direction of the airbag main body 41 in the vicinity of the second inflation restriction area 50 (please refer 11 ) is restricted. Furthermore, the second inflation thickness restriction area is divided 50 the inflation area of the airbag main body 41 in a rear lower inflation area 55 in which the gas generator 30th is arranged, and a front upper inflation area 56 , which is on the front of and above the rear lower inflation area 55 with the second inflation thickness restriction area 50 located in between.

As in 6 shown, forms the space between the front lower end of the connection area 54 and the front lower part of the peripheral connection area 45 a lower front connecting passage 57 . The lower front connecting passage 57 connects the rear lower inflation area 55 and the front upper inflation area 56 at the front lower end of the second inflation thickness restriction area 50 together. The space between the rear upper end of the connection area 54 and the rear upper part of the peripheral connection area 45 forms a rear upper connecting passage 58 . The rear upper connecting passage 58 connects the rear lower inflation area 55 and the front upper inflation area 56 at the rear upper end of the second inflation thickness restriction area 50 together.

Furthermore, in the present embodiment, as in FIG 11 shown, the position in the front-back direction and the dimension in the vehicle width direction of the second inflation thickness restriction area 50 set such that the inflation thickness of the part of the airbag main body 41 between the connection area 49 and the second inflation thickness restriction area 50 greater than the inflation thickness of the area between the second inflation thickness restriction area 50 and the fixation area 46 is.

<Inner tube 60>

As in 6 and 7 shown is the inner tube 60 in the rear lower inflation area 55 arranged such that the inner tube 60 at least the gas outlet 31a of the gas generator 30th surrounds. For forming the inner tube 60 becomes a single piece of cloth made of the same material as the airbag main body 41 is manufactured, used. The piece of cloth is cut in half along a fold line 61 folded, which is defined in the middle in the vehicle width direction so that it overlaps with itself in the vehicle width direction. To distinguish the two overlapping areas of the cloth piece, the part located on the vehicle occupant side (the driver's seat side) becomes a cloth area 62 and the part that is on the opposite side (the passenger seat side) is called a cloth area 63 designated.

The inner tube 60 is with the airbag main body 41 through a connection area 64 connected along the fold line 61 is trained. The cloth areas 62 , 63 which are folded in half are connected to each other by a connection area 65 connected, which extends substantially vertically along the front edges. The rear upper end of the connection area 65 crosses with the rear upper end of the peripheral connection area 45 . The lower ends of the cloth areas 62 , 63 are not connected. These parts, which are not connected, form a lower opening 66 of the inner tube 60 .

The top end of the inner tube 60 extends to the rear upper end of the airbag main body 41 and is at the rear upper end through the peripheral connection area 45 connected (sewn together with this).

Furthermore, each of the cloth areas points 62 , 63 an opening 67 , which is a hole, at a position above the opening 66 on. The inside of the inner tube 60 is with the outside through the openings 66 , 67 in the rear lower inflation area 55 connected.

The majority of the gas generator 30th is through the insertion opening 47 introduced so that it is at the rear end of the rear lower inflation area 55 and at the rear end in the inner tube 60 is arranged. Bolts 33 are in the inner tube 60 and the vehicle occupant-side cloth area 43 introduced. Through these insertion processes, the gas generator 30th on the inner tube 60 and the airbag main body 41 secured and positioned relative to these.

<First inner tether 70>

The first inner tether 70 is located above the connection area 49 in the airbag main body 41 . The first inner tether 70 is below the lower part of the head PH of the vehicle occupant P1 (the lower part of the headrest 18th ), as in 2nd shown, arranged.

As in 7 and 12th shown, the first inner tether 70 two pieces of cloth on the opposite side 71 , 73 and a piece of cloth on the vehicle side 75 on. The opposite pieces of cloth 71 , 73 and the vehicle occupant-side piece of cloth 75 are made of the same material as the airbag main body 41 and are formed with each other in an elongated sheet which is longer in the front-back direction than in the vertical direction.

The opposite pieces of cloth 71 , 73 are arranged so that they are close to each other in the vertical direction. The upper opposite piece of cloth 71 is with the opposite cloth area 44 at the top through the connection area 72 connected, which has an oval shape extending substantially in the front-back direction. The lower opposite piece of cloth 73 is with the opposite cloth area 44 at the lower end through the connection area 74 connected, which has an oval shape extending substantially in the front-back direction.

The piece of cloth on the vehicle passenger side 75 is with the vehicle occupant-side cloth area 43 in the middle in the vertical direction through the connection area 76 connected, which has an oval shape extending substantially in the front-back direction. The connection area 76 is in the middle between the connection areas 72 , 74 in the vertical direction.

The lower end of the upper opposite piece of cloth 71 and the upper end of the vehicle occupant-side piece of cloth 75 are through the connection area 77 interconnected, which extends substantially in the front-back direction. The upper end of the lower opposite piece of cloth 73 and the lower end of the vehicle occupant-side piece of cloth 75 are through the connection area 78 interconnected, which extends substantially in the front-back direction.

The upper and lower opposite pieces of cloth 71 , 73 and the vehicle occupant-side piece of cloth 75 are through the connection areas 77 , 78 in the manner described above for configuring the first inner tether 70 connected with each other. The opposite ends in the vertical direction of the first inner tether 70 are with vertically separated sections in the opposite side of the cloth area 44 through the connection areas 72 , 74 connected. The middle area in the vertical direction of the first inner tether 70 is with the vehicle occupant-side cloth area 43 through the connection area 76 connected.

With these connecting structures, the upper part and the lower part of the first inner tether bridge 70 between the vehicle occupant-side cloth area 43 and the opposite cloth area 44 .

The circumferential length L1 the opposite side of the cloth 44 between the portion at which the upper end of the first inner tether 70 through the connection area 72 is connected, and the portion at which the lower end of the first inner tether 70 through the connection area 74 connected, it is determined that it is longer than the circumferential length L2 in the vertical direction of the vehicle occupant-side cloth area 43 is at the portion at which the central portion of the first inner tether 70 through the connection area 76 connected is. The circumferential length L1 is the dimension of the opposite side of the cloth 44 between the lower end of the connection area 72 and the upper end of the connection area 74 . The circumferential length L2 is the dimension in the vertical direction of the cloth area on the vehicle occupant side 43 in the area that connects with the connection area 76 is surrounded.

<First outer tether 81>

As in 7 and 8th shown is the first outer tether 81 made of the same material as that of the airbag main body 41 made and is inclined so that it is higher towards the front end. The first outer tether 81 is arranged so that it is closer to the vehicle occupant (the driver's seat) than the vehicle occupant-side cloth area 43 and bridges between the airbag main body 41 and the gas generator 30th . Specifically, the rear lower end of the first outer tether is 81 , which is a first end, on the upper bolt 33 of the gas generator 30th secured so that it is at the fixation area 46 of the airbag main body 41 is appropriate. The front upper end of the first outer tether 81 , which is a second end, is with the portion of the vehicle occupant-side cloth area 43 that the shoulder area PS of the vehicle occupant P1 touched, connected by the connection area 49. The rear lower end of the first outer tether 81 can on the lower bolt 33 instead of the top bolt 33 be secured. Alternatively, the rear lower end of the first outer tether 81 , instead of on the bolt 33 , be secured to the seat frame, such as the side frame area 21 . This configuration applies to the second outer tether 82 , which is described below.

As in 9 shown is the length L3 the first outer tether 81 between the the rear lower end (the first end) and the front upper end (the second end) are set to be shorter than the circumferential length L4 of the airbag main body 41 between the fixation area 46 (the bolt 33 ) and the portion at which the front upper end (the second end) of the first outer tether 81 is appropriate.

<Second outer tether 82>

The second outer tether 82 is made of the same material as that of the airbag main body 41 and extends in the front-back direction below the first outer tether 81 . The second outer tether 82 is arranged such that it is closer to the vehicle occupant (the driver's seat) than the vehicle occupant-side cloth area 43 , and bridges between the airbag main body 41 and the gas generator 30th . Specifically, the rear end is the second outer tether 82 , which is a first end, on the upper bolt 33 of the gas generator 30th secured so that it is at the fixation area 46 is appropriate. The front end of the second outer tether 82 , which is a second end, is at the front end of the airbag main body 41 through part of the peripheral connection area described above 45 appropriate.

The length L5 of the second outer tether 82 between the rear end (the first end) and the front end (the second end) is determined to be shorter than the circumferential length L6 of the airbag main body 41 between the fixation area 46 (the bolt 33 ) and the portion at which the front end (the second end) of the second outer tether 82 is appropriate.

The airbag module described above ABM is in a compact form by folding the airbag 40 with the airbag main body 41 in the uninflated and expanded state (see 5 ) and is in the stowage area 24th stowed away.

As in 3rd and 5 shown are the bolts 33 of the gas generator 30th through the side frame area 21 from the opposite side (the passenger seat side). Nuts 34 are on the bolts 33 from the vehicle occupant side (the driver's seat side) for fixing the fixing area 46 of the airbag main body 41 and the rear lower part of the inner tube 60 to the side frame area 21 together with the gas generator 30th screwed.

The gas generator 30th can on the side frame area 21 using components other than the bolt 33 and the nuts 34 be fixed. The generator 31 can on the side frame area 21 without using the bracket 32 be fixed.

As in 4th shown, the side impact airbag device has an impact sensor 84 and a controller 85 in addition to the airbag module described above ABM on. The impact sensor 84 has an acceleration sensor and detects a side impact on the vehicle 10th is applied. The control 85 controls the activation of the generator 31 based on a detection signal from the impact sensor 84 .

Furthermore, the vehicle points 10th Seat belt devices (not shown) for restraining vehicle occupants P1 , P2 that are on the vehicle seats 13 , 14 sit on.

The operation and advantages of the above-described embodiment will now be described.

As in 1 shown when an impact due to a side collision on the side wall 12th is applied, the upper body of the vehicle occupant tilts P1 on the far side from the side wall 12th to which the impact was applied (the driver's seat side), towards the side wall 12th to fall due to sluggishness.

Likewise, if a side impact of the strength greater than or equal to a predetermined value hits the side wall 12th is applied, the impact sensor indicates 84 a detection signal. The controller outputs on the basis of this detection signal 85 an activation signal to the generator 31 out. In response to the activation signal, the generator bumps 31 the filling gas G1 from the gas outlet 31a off and the filling gas G1 is first the inner tube 60 , as in 6 shown, fed. Accordingly, the inflation of the inner tube begins 60 .

Some of the fill gas G1 flows out of the inner tube 60 in the rear lower inflation area 55 over the openings 66 , 67 . The internal pressure of the lower rear inflation area 55 increases when the filling gas G1 is fed. Accordingly, the inflation of the rear lower inflation area begins 55 while unfolding (unfolding). The second inflation restriction area 50 is pulled in the vehicle width direction when the rear lower inflation area 55 is unfolded and inflated.

Some of the fill gas G1 which is the rear lower inflation area 55 supplied, flows into the front upper inflation area 56 through the front lower connecting passage 57 and the rear upper connecting passage 58 . To the rear lower inflation area 55 begins to inflate the front upper inflation area 56 while unfolding (unfolding). The first inner tether 70 is pulled in the vehicle width direction when the front upper inflation area 56 is unfolded and inflated.

As described above, in the course of unfolding and inflating the rear lower inflation area 55 and the front upper inflation area 56 the seat cushion 22 in the vicinity of the stowage area 24th pressed as in 3rd shown so that the seat cushion 22 on the breakable area 26 is broken up. With the part in the vicinity of the gas generator 30th in the stowage area 24th the airbag main body remains 41 from the stowage area 24th in front. After that, as in 2nd and 4th is shown, the airbag main body 41 diagonally forward and upward from the fixation area 46 between the adjacent vehicle seats 13 and 14 unfolded and inflated.

In the side impact airbag device, it is important to have the airbag main body 41 within a predetermined deployment range to protect the vehicle occupant P1 to unfold and inflate against an impact.

In this regard, the airbag main body pulls 41 that is deployed and inflated, each of the first outer tether 81 and the second outer tether 82 in the present embodiment.

As in 9 shown is the length L5 of the second outer tether 82 shorter than the circumferential length L6 of the airbag main body 41 on which the second outer tether 82 is appropriate. Accordingly, the second outer tether 82 which by the airbag main body 41 is pulled, which is unfolded and inflated, taut between the rear end, which at the fixing area 46 is attached, and the front end, which is at the front end of the airbag main body 41 is appropriate. If the airbag main body 41 which on the side frame area 21 at the fixation area 46 is fixed, deployed diagonally forward and upward and inflated, the airbag main body tries 41 , back around the fixation area 46 to rotate as indicated by an arrow A in 8th displayed. Such rotation is through the second outer tether 82 restricted which is the front end of the airbag main body 41 pulls as indicated by an arrow B. As a result, the airbag main body 41 prevented from falling backwards.

Just like in 9 shown is the length L3 the first outer tether 81 shorter than the circumferential length L4 of the airbag main body 41 on which the first outer tether 81 is appropriate. Accordingly, the first outer tether 81 which by the airbag main body 41 pulled, which is unfolded and inflated, taut between the rear lower end, which at the fixing area 46 is attached, and the front upper end, which on the airbag main body 41 is appropriate. Thus, when the airbag main body 41 the airbag main body tries to deploy and inflate diagonally forward and upward 41 , forward around the fixation area 46 to turn. Such rotation is through the first outer tether 81 restricted in a taut condition. As a result, the airbag main body 41 prevented from falling forward.

As described above, the airbag main body 41 deployed and inflated within the predetermined deployment range so that the airbag main body 41 is prevented from projecting forward or backward from the deployment area.

When the deployment and inflation are complete, the airbag main body is in place 41 between the vehicle occupants P1 and P2 that are in the vehicle seats 13 and 14 sit. The rear lower end of the rear lower inflation area 55 is between the vehicle occupants P1 that is in the vehicle seat 13 sits, and the center console 15 (please refer 2nd ). The rear lower end of the rear lower inflation area thus resists 55 a movement towards the side wall 12th to which the impact was applied when the upper body of the vehicle occupant P1 is recorded, which in the direction of the side wall 12th falls.

As in 11 shown is the area of the airbag main body 41 between the connection area 49 and the second inflation thickness restriction area 50 inflated with a greater inflation thickness than the area between the second inflation thickness restriction area 50 and the fixation area 46 and pushes the first outer tether 81 towards the vehicle occupant (driver’s seat). The airbag main body 41 absorbs tension that tries to airbag main body 41 towards the fixation area 46 over the first outer tether 81 to draw. At the same time, the part of the airbag main body takes off 41 that is between the connection area 49 and the second inflation thickness restriction area 50 and in the vicinity of the connection area 49 there is a tensile stress F in a direction along the curved inflated area, in this case in a rearward direction toward the vehicle occupant P1 (Direction diagonally backwards towards the vehicle occupant). A component force Fa that acts in the vehicle width direction and is directed toward the vehicle occupant (the driver's seat side) becomes in the part of the airbag main body 41 generated between the connection area 49 and the second inflation thickness restriction area 50 and in the vicinity of the connection area 49 located. The component force Fa acts as an opposite force, the external force F1 cancels out through the airbag main body 41 from the body of the vehicle occupant P1 is recorded, which tends to move towards the side wall 12th to move to which the impact was applied. This causes the airbag main body 41 resists movement, even if it is external force F1 from the vehicle occupant P1 picks up, causing movement of the vehicle occupant P1 towards the side wall 12th to which the impact was applied is limited. Accordingly, the side impact that hits the upper body of the vehicle occupant P1 is applied, steamed.

As described above, the area between the connection area 49 and the second inflation thickness restriction area 50 inflated to a large inflation thickness. This area is closer to the fixation area 46 than the section of the airbag main body 41 that the shoulder area PS of the vehicle occupant P1 touched. This limits the interference between the part of the upper body of the vehicle occupant P1 which has the largest dimension in the width direction, which is the shoulder area PS and the area of the airbag main body described above 41 one that has a large inflation thickness.

Furthermore, if the part is at the front upper inflation area 56 above the connection area 49 or the upper part is unfolded and inflated, the first inner tether restricts 70 the inflation thickness of the upper part in the vehicle width direction as in 12th shown a.

Based on the positions where the first inner tether 70 on the vehicle occupant-side cloth area 43 and the opposite cloth area 44 is connected is the circumferential length L2 of the vehicle occupant-side cloth area 43 determined that it should be shorter than the circumferential length L1 the opposite side of the cloth 44 is (see 7 ). Thus, as in 2nd and 12th is shown, the upper part at the connection area 76 on which the first inner tether 70 with the vehicle occupant-side cloth area 43 connected, bent (inclined) so that the upper part is progressively closer to the vehicle occupant (the driver's seat side) toward the upper end. The upper part of the front upper inflation area 56 approaches the head PH to further restrict movement of the head PH towards the side wall 12th to which the impact was applied. This improves the performance in protecting the vehicle occupant P1 against an impact.

In addition to the above, the present embodiment has the following advantages.

In the embodiment described above, the vehicle occupant-side cloth area 43 and the opposite cloth area 44 through the connection area 49 connected to each other while in contact with each other. Likewise, the front upper end (the second end) of the first outer tether 81 with the vehicle occupant-side cloth area 43 through the connection area 49 connected.

Therefore, since the connection area 49 is provided, the vehicle occupant-side cloth area 43 and the opposite cloth area 44 connected to each other at the same time when the front upper end of the first outer tether 81 and the vehicle occupant-side cloth area 43 be connected to each other. This reduces the number of manufacturing steps for the airbag 40 and thus the manufacturing steps for the side impact airbag device compared to a case in which these connection processes are carried out separately.

The embodiment described above can be modified as follows.

<Regarding First Inflation Thickness Restriction Area>

The first inflation thickness restriction area does not necessarily have to pass through the connection area 49 as in the embodiment described above. For example, like in 13 shown, the first inflation thickness restriction area can be through an inner tether 86 configured in the airbag main body 41 is arranged and between the vehicle occupant-side cloth area 43 and the opposite cloth area 44 bridged. When modifying 13 has the inner tether 86 two cloth areas 87 which are made of the same material as the airbag main body 41 and which are independent of each other. The cloth area 87 on the vehicle occupant side (the driver seat side) is with the vehicle occupant-side cloth area 43 which is adjacent to the cloth area 87 is through the connection area 88 connected, which at the first end of the cloth area 87 is provided. The cloth area is similar 87 on the opposite side (the Passenger seat side) with the opposite cloth area 44 connected, which is adjacent to the cloth area 87 is through the connection area 89 which is at the first end of the cloth area 87 is provided. The cloth areas 87 are with each other through the connection area 91 connected at the second end, which is opposite to the first end, at which the connection areas 88 , 89 are provided. The connection structures cause the inflation thickness of the airbag main body 41 , which is restricted by the first inflation thickness restriction range, is larger than in the above-described embodiment.

In this case, the front upper end (the second end) of the first outer tether 81 with the vehicle occupant-side cloth area 43 through the connection area 88 be connected.

In 13 similar or the same reference numerals are assigned to the components that are similar or identical to the corresponding components of the embodiment described above.

With this modification, the inner tether 86 pulled tight when the airbag main body 41 is unfolded and inflated. The inflation thickness of the airbag main body 41 is limited to the section where the inner tether 86 bridged.

Likewise are the inner tether 86 and the front upper end (the second end) of the first outer tether 81 each with the vehicle occupant-side cloth area 43 through the common connection area 88 connected. This is advantageous because the number of manufacturing steps is reduced compared to a case in which these connection processes are carried out with different connection areas.

<Regarding airbag main body 41>

The fixation area 46 which is in the rear lower part of the airbag main body 41 can be attached to a high-strength component, such as the side frame area 21 be fixed as long as the fixation area 46 in the side of either the vehicle seat 13 or the vehicle seat 14 located closer to the adjacent one of the vehicle seats 13 , 14 is. Alternatively, the fixation area 46 be fixed to a component that is in the vicinity of the side of the vehicle seat 13 , 14 located, such as on the center console 15 .

Although essentially the entire airbag main body 41 The airbag main body can be configured to inflate as in the above-described embodiment 41 also partially have a non-inflation area which has no inflation gas G1 is supplied or which is not inflated.

<Regarding Second Inflation Thickness Restriction Area 50>

As with the connection area 49 In the embodiment described above, the second inflation thickness restriction area 50 by connecting without using the cloth area 51 , the vehicle occupant-side cloth area 43 and the opposite side of the cloth 44 with each other while the cloth areas 43 and 44 be brought into contact with each other, configured.

<Regarding first outer tether 81 and second outer tether 82>

The front upper end of the first outer tether 81 , which is the second end, can be attached to a part of the vehicle occupant-side cloth area 43 that the shoulder area PS of the vehicle occupant P1 touched by a connection area different from the connection area 49 which is the first inflation thickness restriction area.

The front end of the second outer tether 82 , which is the second end, can be connected to the front end of the airbag main body 41 by a connection area different from the circumferential connection area 45 be connected.

The rear lower end (the first end) of the first outer tether 81 and the rear end (the first end) of the second outer tether 82 can on the same section of the fixation area 46 of the airbag main body 41 (the upper bolt 33 ), as in the embodiment described above. Alternatively, these ends can be on different sections of the fixation area 46 to be appropriate.

<Further modifications>

The control 85 may be changed to have a configuration in which an activation signal is sent to the generator 31 is output when it is predetermined that there will be a side impact on the vehicle 10th will be applied.

The above-described side impact airbag device can be applied to a vehicle in which three or more vehicle seats are arranged side by side in the vehicle width direction. In this case the The airbag main body deploys and inflates between two adjacent ones of the vehicle seats in response to a side impact applied to the side wall of the vehicle.

Vehicles to which the side impact airbag device described above can be applied include various industrial vehicles in addition to private automobiles.

The side impact airbag device described above can be applied to side impact airbag devices that are mounted in vehicles other than vehicles, such as airplanes, boats, and ships, and protect a vehicle occupant seated in a vehicle seat from an impact.

Various changes in form and detail can be made in the above examples without departing from the scope of the claims and their equivalents. The examples are for the purpose of description only and not for the purpose of limitation. Descriptions of features in each example are understood to be applicable to similar features or aspects in other examples. Suitable results can be achieved if sequences are carried out in a different order and / or if components in a described system, architecture, device or circuit are combined differently and / or are replaced or replaced by other components or their equivalents. The scope of the disclosure is not defined by the detailed description, but rather by the claims and their equivalents. All variations within the scope of the claims and their equivalents are encompassed by the disclosure.

It is explicitly emphasized that all features disclosed in the description and / or the claims are considered separate and independent from each other for the purpose of the original disclosure as well as for the purpose of restricting the claimed invention regardless of the combinations of features in the embodiments and / or the claims should. It is explicitly stated that all range indications or indications of groups of units disclose any possible intermediate value or subset of units for the purpose of the original disclosure as well as for the purpose of restricting the claimed invention, in particular also as a limit of a range specification.

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• JP 6327110 [0006]

Claims (5)

Side impact airbag device having an airbag (40) having an airbag main body (41), in which the airbag main body (41) has a rear lower part in which a fixing area (46) is defined, the airbag main body (41) is configured to to be fixed to the fixation area (46) on a vehicle having a plurality of vehicle seats arranged in a widthwise direction and the side impact airbag device configured to diagonally up and down the airbag main body (41) from the fixation area (46) deploying and inflating in front of adjacent seats of the vehicle seats with a fill gas supplied in response to a side impact applied to a side wall of the vehicle, thereby causing a vehicle occupant to sit in the vehicle seat on a side remote from the side wall, protected against the impact nt, the side impact airbag device is characterized in that the airbag (40) further comprises a first outer tether (81) and a second outer tether (82) which are taut between the airbag main body (41) and the vehicle occupant when the airbag main body ( 41) is unfolded and inflated, a first end of the first outer tether (81) and a first end of the second outer tether (82) are attached to the fixing area (46), a second end of the first outer tether (81) is attached to a section of the airbag main body (41) that contacts the shoulder area of the vehicle occupant, a second end of the second outer tether (82) is attached to a front end of the airbag main body (41), the airbag main body (41) has a first inflation thickness restriction area (49, 86) which restricts an inflation thickness of a portion to which the second end of the first outer tether (81) is attached, and e has a second inflation thickness restriction area (50) restricting an inflation thickness of a portion between the first inflation thickness restriction area (49, 86) and the fixation area (46), and an inflation thickness of a portion between the first inflation thickness restriction area (49, 86) and the second inflation thickness restriction area (50 ) is set such that it is larger than an inflation thickness of a portion between the second inflation thickness restriction area (50) and the fixing area (46). Side impact airbag device after Claim 1 , characterized in that a length (L3) of the first outer tether (81) between the first end and the second end is set to be shorter than a circumferential length (L4) of the airbag main body (41) between the fixing portion (46) and one Is section to which the second end of the first outer tether (81) is attached, and a length (L5) of the second outer tether (82) between the first end and the second end is set to be shorter than a circumferential length (L6 ) of the airbag main body (41) between the fixing area (46) and the front end to which the second end of the second outer tether (82) is attached. Side impact airbag device after Claim 1 or 2nd , characterized in that the airbag main body (41) has a vehicle occupant side cloth area (43) closer to the vehicle occupant and an opposite side cloth area (44) more distant from the vehicle occupant, the first inflate thickness restriction area (49) the vehicle occupant side Connects the cloth area (43) and the opposite side cloth area (44) while bringing the cloth areas (43, 44) into contact with each other, and the second end of the first outer tether (81) to the vehicle occupant-side cloth area (43) through the first inflation thickness restriction area (49) is connected. Side impact airbag device after Claim 1 or 2nd , characterized in that the airbag main body (41) has a vehicle occupant side cloth area (43) closer to the vehicle occupant and an opposite side cloth area (44) more distant from the vehicle occupant, the first inflation thickness restriction area is configured by an inner tether (86), which is disposed in the airbag main body (41) and bridges between the vehicle occupant-side cloth area (43) and the opposite-side cloth area (44), and one end of the inner tether (86) closer to the vehicle occupant-side cloth area (43) and the second end of the first outer Holding belt (81) are connected to the vehicle occupant-side cloth area (43) by a common connecting area (88). Side impact airbag device according to one of the Claims 1 to 4th , characterized in that the airbag main body (41) has a vehicle occupant-side cloth area (43) which is closer to the vehicle occupant and an opposite-side cloth area (44) which is further away from the vehicle occupant, a first inner tether (70) in the airbag main body (41) and located above the first inflation thickness restriction region (49), opposite ends in a vertical direction of the first inner tether (70) are connected to vertically separated portions in the opposite side cloth region (44), a middle region in the vertical direction of the first inner tether (70) is connected to the vehicle occupant-side cloth portion (43), and a circumferential length (L1) of the opposite-side cloth portion (44) between a portion to which an upper end of the first inner tether (70) is connected and one Section with which a lower end of the first inn tether belt (70) is set to be longer than a circumferential length (L2) in the vertical direction of the vehicle occupant-side cloth portion (43) at a portion to which the central portion of the first inner tether strap (70) is connected.

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