JP4946932B2 - Side airbag device - Google Patents

Description

  The present invention relates to a side airbag device including an airbag that is deployed and inflated between a passenger compartment side wall and an occupant.

2. Description of the Related Art Conventionally, as described in, for example, Patent Documents 1 and 2, there is a side airbag device including an airbag that is deployed and inflated from the rear to the front between a passenger compartment side wall and an occupant.
The side airbag device described in Patent Literature 1 includes an airbag corresponding to the chest from the occupant's head. In this side airbag device, a central sewing portion in which the base materials are sewn together is provided at a substantially central portion of two base materials that are substantially parallel to the side wall of the airbag compartment, whereby the airbag is inflated. In this case, the air bag can be effectively deployed in the space between the occupant and the side door by preventing the vicinity of the center from being greatly inflated.

  Moreover, in the side airbag apparatus of patent document 2, an airbag has a chest protection site | part which protects a shoulder part from a waist | hip | lumbar part, and a head protection site | part which protects a head. The airbag is provided with an inflow restriction tether that allows the chest protection part and the head protection part to communicate with each other only at the front end part and the rear end part. When the airbag is deployed and inflated, the gas generated in the inflator is blown toward the chest protection site to first deploy and inflate the chest protection site, and the head protection site is supplied with the gas supplied to the chest protection site. By supplying through the front and rear communication portions of the tether, the head protection site is deployed and inflated with a delay from the chest protection site. In this side airbag device, the head protection part is prevented from starting to expand before the chest protection part is deployed and expanded, and the head protection part is sandwiched and deployed between the vehicle and the occupant. It is intended to suppress problems such as time resistance.

  By the way, the space | interval of the compartment side wall and a passenger | crew in the vehicle width direction of a vehicle becomes the narrowest in the site | part corresponding to a passenger | crew's shoulder part. Therefore, in order to smoothly deploy the airbag between the passenger compartment side wall and the occupant when the airbag is deployed and inflated, it is necessary to restrict the inflation of a portion of the airbag corresponding to the shoulder of the occupant. Required. In this regard, the airbag described in Patent Documents 1 and 2 is provided with a tether in front and above a portion corresponding to the shoulder portion of the occupant in the deployed state, thereby restricting the expansion of the shoulder portion. That's not enough. Therefore, an airbag 100 shown in FIG. 5 has been studied as an airbag that regulates the expansion of the shoulder.

An airbag 100 shown in FIG. 5 is an airbag that is accommodated in the backrest portion 13 of the seat 10 before deployment, and that is deployed and inflated from the backrest portion 13 toward the front of the vehicle in the event of a vehicle-side collision. The airbag 100 is provided with a tether 111 at a portion corresponding to the shoulder portion of the occupant P when deployed and inflated, that is, at a portion on the vehicle rear side and below the tether of the airbag described in Patent Documents 1 and 2. Therefore, the rear end portion of the head protection part 115 and the chest protection part 116 is partitioned by the tether 111, and only the front part of each protection part 115, 116 communicates. When the airbag 100 before deployment is accommodated in the seat back portion 13 like the airbag 100, the tether 111 in the deployed state of the airbag 100 is positioned in accordance with the shape of the seat back portion 13. There is a restriction on installation such that it must be provided at a position lower than the height. Therefore, when the airbag 100 is deployed and inflated, the gas discharged from the inflator 113 is first supplied to the chest protection region 116 as shown by the arrow in FIG. The gas is supplied to the entire airbag 100 in such a manner that is supplied to the head protecting portion 115.
JP 11-91488 A JP 2007-203939 A

  As described above, in the airbag 100 shown in FIG. 5, the gas discharged from the inflator 113 is supplied to the chest protection part 116 to some extent and then supplied to the head protection part 115 through the flow path in front of the tether 111. Will be. For this reason, only the front portion expands prior to the rear portion of the head protection portion 115, and a situation in which the expansion and expansion of the head protection portion 115 becomes unstable may occur.

  The present invention has been made in view of such circumstances, and an object thereof is to have an airbag that is deployed and inflated corresponding to at least the chest from the occupant's head and inflated at a portion corresponding to the shoulder. In some cases, it is an object of the present invention to provide a side airbag device capable of stably deploying and inflating a portion corresponding to a head in an airbag.

In order to achieve the above object, the invention according to claim 1 is directed from the rear of the vehicle to the front between the occupant and the cabin side wall at least corresponding to the chest from the occupant's head when the vehicle collides. The airbag includes a airbag that is deployed and inflated, and the airbag is provided with a regulating means for regulating expansion in the vehicle width direction at a portion corresponding to the shoulder portion of the occupant in the deployed state, and the gas generated by the gas generation source during the deployment is the regulating means A side airbag device supplied from below,
When the airbag is deployed and inflated, a first flow path through which gas generated from the gas generation source flows is formed in front of the restricting means and the rear of the restricting means in the vehicle is more than the first flow path. A second flow path having a small flow path cross-sectional area is formed, and the restricting means is provided so as to extend forward from a position corresponding to a front end portion of a seat back portion in a deployed state of the airbag. Is the gist.

  According to the above configuration, most of the gas supplied to the airbag by the gas generation source flows from the rear to the front in a portion corresponding to the chest of the occupant in the airbag and then passes through the first flow path in the airbag. It is supplied to the part corresponding to the head of the passenger. On the other hand, the remaining part of the gas supplied to the airbag by the gas generation source is discharged from the gas generation source and then flows upward and corresponds to the head of the occupant through the second flow path behind the restricting means. Supplied to the site. Therefore, a part of the gas discharged from the gas generation source from the initial stage when the airbag is deployed and inflated can be supplied to the portion corresponding to the head of the passenger in the airbag through the second flow path. It can suppress that the expansion | swelling of the site | part corresponding to is biased. As a result, the part corresponding to the head of the occupant can be stably deployed and expanded while restricting the expansion of the part corresponding to the shoulder of the occupant.

In the above configuration, the portion corresponding to the shoulder portion of the airbag includes the portion corresponding to the shoulder portion of the occupant and the upper arm portion of the occupant.
According to a second aspect of the present invention, in the first aspect of the present invention, the flow path width of the second flow path in the vehicle width direction is the distance between the backrest portion of the seat on which the occupant is seated and the side wall of the passenger compartment. The gist is that they are formed to have substantially the same width.

  In the above configuration, the second flow path of the airbag is deployed and inflated behind the shoulder, so that the airbag is deployed and inflated between the seat back portion and the passenger compartment side wall. Here, if the flow path width in the vehicle width direction of the second flow path is wider than the interval between the backrest portion and the vehicle compartment side wall, the air bag is placed between the backrest portion and the vehicle compartment side wall when the airbag is deployed and inflated. The air bag can be hindered from being expanded and inflated. In this respect, according to the above-described configuration, the flow path width in the vehicle width direction of the second flow path is formed to be substantially the same as the distance between the seat back portion and the passenger compartment side wall. The flow path width of the second flow path can be ensured to the maximum while the airbag is smoothly deployed between the backrest portion and the compartment side wall.

  The invention according to claim 3 is the gist of the invention according to claim 1 or 2, wherein the regulating means is a tether that connects a portion of the airbag on the vehicle interior side and a vehicle exterior side portion. To do.

  According to the above configuration, by appropriately setting the length of the tether, the expansion of the portion of the airbag corresponding to the shoulder of the occupant is restricted, and the occupant's shoulder is also suitably protected from intrusion of the side wall of the passenger compartment. can do.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects of the present invention, the restricting means has a position in which the front portion of the vehicle is higher than the rear portion in the deployed state of the airbag. The gist is to form it diagonally.

According to said structure, since a control means is provided along the direction through which gas flows in an airbag, the flow of gas can be made smoother.
Specifically, according to the first to fourth aspects of the present invention, the flow path cross-sectional area of the first flow path is equal to the flow path cross-sectional area of the second flow path of 3. It is possible to adopt a mode in which it is set to 0 to 4.5 times. Further, the cross-sectional area of the first flow path is more preferably set to 3.5 to 4.0 times the cross-sectional area of the second flow path.

  According to the above configuration, the gas discharged from the gas generation source is appropriately distributed to the first flow path and the second flow path, so that the chest of the occupant can be protected quickly, and in the airbag A portion corresponding to the head of the occupant can be stably deployed and inflated.

  The side airbag device of the present invention supplies a part of the gas discharged from the gas generation source from the initial stage when the airbag is deployed and inflated to a portion of the airbag corresponding to the head of the occupant through the second flow path. Therefore, it is possible to suppress the uneven expansion of the portion corresponding to the head of the occupant. As a result, the part corresponding to the head of the occupant can be stably deployed and expanded while restricting the expansion of the part corresponding to the shoulder of the occupant.

(First embodiment)
DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment in which a side airbag device of the present invention is embodied will be described with reference to FIGS. In the following description, the forward direction of the vehicle will be described as the front, and the reverse direction of the forward direction of the vehicle will be described as the rear.

  As shown in FIGS. 1 and 2, a seat 10 provided in a vehicle interior includes a stool 12 fixed on a vehicle floor through a slide rail 11, and a stool supported by the stool 12. 12 includes a backrest portion 13 extending upward from the rear end portion of the twelve headrest 14 and a headrest 14 supported by the backrest portion 13. As shown in FIG. 1, the side airbag device 20 according to the present embodiment is normally housed in a case 19 in a portion of the backrest 13 on the door (vehicle compartment side wall) 17 side. When the vehicle collides with the other side, it protrudes from the side surface (the surface on the door 17 side) of the backrest 13 and expands and expands between the occupant P and the door 17.

  As shown in FIG. 2, the side airbag device 20 includes an inflator 30 as a gas generation source fixed inside the case 19, and a bag-like airbag 21 that covers the inflator 30. A gas generating agent for deploying and inflating the airbag 21 is accommodated in the inflator 30. A gas discharge port (not shown) for discharging a gas generated from the gas generating agent is formed on the side surface of the inflator 30. The inflator 30 is electrically connected to an impact sensor (not shown) for detecting an impact caused by a side collision of the vehicle. When the impact due to the side collision exceeds a predetermined value, gas is generated from the gas generating agent in the inflator 30 based on a detection signal from the sensor, and this gas is discharged and supplied into the airbag 21 from the gas discharge port. The airbag 21 is configured to be deployed and inflated.

  The airbag 21 of the present embodiment is housed in the case 19 in a folded state before being deployed and inflated, and corresponds to the chest from the head of the occupant P as shown in FIG. Then, the vehicle expands and expands from the rear to the front of the vehicle. That is, as shown in FIG. 2, the airbag 21 includes a chest protection part 26 that expands and inflates below the upper end of the backrest 13 corresponding to the chest of the occupant P, and a headrest corresponding to the head of the occupant P. And a head protecting portion 25 that expands and expands at a height of 14.

  As shown in FIGS. 2 and 3, the airbag 21 is formed so as to form a bag as a whole by sewing a pair of base fabrics 21a and 21b made of, for example, woven fabric or the like at the periphery thereof. An outer peripheral seam 22 formed by sewing a pair of base fabrics 21a and 21b with sewing threads is formed along the outer peripheral edge. Further, as shown in FIGS. 2 and 3, the airbag 21 includes a tether 23 that connects a base fabric 21a on the vehicle interior side and a base fabric 21b on the vehicle exterior side in the airbag 21 in the deployed state. In this embodiment, the tether 23 constitutes a regulating means for regulating expansion in the vehicle width direction. As shown in FIG. 2, the tether 23 is provided so as to extend substantially horizontally from the position corresponding to the front end portion of the backrest portion 13 of the seat 10 in the deployed state of the airbag 21, for example. The length in the front-rear direction is provided so as to correspond to the length in the front-rear direction of the upper arm portion of the occupant P. As shown in FIG. 3, the length L1 of the tether 23 in the vehicle width direction is formed to be slightly shorter than the distance between the door 17 and the shoulder of the passenger P, for example.

Here, in the present embodiment, the inflator 30 is located in a lower part than the tether 23 in the deployed state of the airbag 21, that is, in the chest protection part 26. As shown in FIG. 1, the backrest portion 13 of the seat 10 has a narrower width in the vehicle width direction as it is closer to the upper portion. Therefore, when the side airbag device 20 is accommodated in the backrest portion 13, This is because there is a restriction on mounting that the upper part cannot be accommodated. Therefore, the gas discharged from the inflator 30 is first supplied to the chest protection part 26. The airbag 21 has a first flow path 28 positioned in front of the tether 23 at the shoulder and a second flow path 29 positioned in the rear of the tether 23 as flow paths through which the gas discharged from the inflator 30 flows. Is formed. As shown in FIG. 3, the second channel 29 has a channel cross-sectional area smaller than that of the first channel 28. More specifically, the second channel 29 is disconnected when the airbag 21 is inflated. The area is set to be 3.0 to 4.5 times the cross-sectional area of the second flow path 29. Incidentally, the flow path cross-sectional area of the second flow path 29 is set to, for example, 280～800Mm ^2. Further, when the airbag 21 is deployed and inflated, the flow path width L2 of the second flow path 29 in the vehicle width direction is set to be approximately the same as the distance between the backrest portion 13 of the seat 10 on which the passenger P is seated and the door 17. Yes.

  Further, the airbag 21 of the present embodiment is formed with an arm receiving seam 24 to which a pair of base fabrics 21a and 21b are stitched together at a portion corresponding to the arm portion of the occupant P. Is configured to support the arm of the occupant P.

Next, the operation of the side airbag device 20 according to the present embodiment will be described with reference to FIGS.
When an impact is applied to the vehicle due to a side collision of the vehicle, gas is generated from the gas generating agent in the inflator 30 based on a detection signal from the impact sensor, and this gas is discharged from the gas discharge port toward the chest protection part 26. Is done. 2, most of the gas supplied to the airbag 21 by the inflator 30 flows through the chest protection part 26 of the airbag 21 from the rear to the front and then through the first flow path 28. It flows to the part protection site 25. On the other hand, the remaining part of the gas supplied to the airbag 21 by the inflator 30 is discharged from the inflator 30 and then flows upward through the airbag 21 from the tether 23 as shown by the arrow b in FIG. Is also supplied to the head protecting part 25 through the rear second flow path 29. Therefore, the gas discharged from the inflator 30 from the initial stage when the airbag 21 is deployed and inflated is supplied to the head protection part 25 through the second flow path 29. In the present embodiment, when the airbag 21 is inflated, the cross-sectional area of the first flow path 28 is set to be 3.0 to 4.5 times the second flow path 29 and the cross-sectional area of the flow path. Yes. Therefore, although the gas is supplied to the head protection part 25 from the initial stage in which the airbag 21 is deployed and inflated in this way, most of the gas supplied to the airbag 21 in this initial stage is different from the conventional one. Similarly, it flows from the rear of the chest protection part 26 toward the front. Therefore, the airbag 21 can be quickly deployed and inflated from the rear to the front of the vehicle, and the occupant P can be quickly protected against intruders from the side of the vehicle. In addition, the flow path cross-sectional area of the first flow path 28 and the flow path cross-sectional area of the second flow path 29 when the airbag 21 is inflated are set to the above ratio, and the flow path breakage of the second flow path 29 is Since the area is set to 280 to 800 mm ² , for example, the amount of gas flowing through the second flow path 29 can be set to a sufficient amount for stably deploying and expanding the head protecting portion 25 of the airbag 21. .

  As shown in FIG. 3, the second flow path 29 has a flow path width L <b> 2 that is the same as the distance between the backrest 13 and the door 17. Therefore, even if the second flow path 29 is inflated when the airbag 21 is deployed and inflated, the airbag 21 can be smoothly deployed between the backrest portion 13 and the door 17. An amount of gas necessary for improving the stability when the airbag 21 is deployed can be allowed to flow to the head protection part 25. Further, when the airbag 21 is deployed and inflated, the tether 23 restricts the expansion of the portion corresponding to the shoulder of the occupant P, so that the distance between the occupant P and the door 17 is the smallest in the vehicle width direction of the vehicle. The airbag 21 can be smoothly deployed at the site corresponding to the shoulder when the airbag 21 is deployed and inflated.

  As shown in FIG. 2, when viewed from the side of the vehicle, the second flow path 29 is disposed at a position where most of the second flow path 29 overlaps the backrest portion 13, and is slightly away from the passenger protection area. It is provided on the rear side of the occupant's shoulder. That is, the second flow path 29 is a part through which gas flows for improving the stability when the airbag 21 is deployed, and therefore it is only necessary to secure a minimum gas flow rate necessary for achieving the purpose.

As described in detail above, according to the present embodiment, the following operational effects can be achieved.
(1) The side airbag device 20 of the present embodiment is deployed from the rear of the vehicle toward the front corresponding to the chest from the head of the occupant P between the occupant P and the vehicle door 17 during a side collision of the vehicle. An inflatable airbag 21 is provided. The airbag 21 is provided with a tether 23 for restricting inflation in the vehicle width direction at a portion corresponding to the shoulder portion of the occupant P in the deployed state. When the airbag 21 is deployed and inflated, gas from the inflator 30 is Supplied from below. The airbag 21 is formed with a first flow path 28 through which the gas discharged from the inflator 30 flows in front of the tether 23 when the airbag 21 is deployed and inflated, and the gas flows behind the tether 23. A flowing second flow path 29 is formed.

  Therefore, most of the gas supplied to the airbag 21 by the inflator 30 flows through the chest protection portion 26 of the airbag 21 from the rear to the front of the vehicle and then passes through the first flow path 28 to protect the head protection portion of the airbag 21. 25. On the other hand, the remaining part of the gas supplied to the airbag 21 by the inflator 30 is discharged from the inflator 30 and then flows upward and is supplied to the head protection part 25 through the second flow path 29 behind the tether 23. Is done. Therefore, since a part of the gas discharged from the inflator 30 is supplied to the head protection part 25 of the airbag 21 through the second flow path 29 from the initial stage when the airbag 21 is deployed and inflated, the expansion of the head protection part 25 is performed. Can be suppressed. As a result, the head protection part 25 can be stably deployed and inflated while restricting the expansion of the part corresponding to the shoulder of the occupant P.

  (2) In the side airbag device 20 of the present embodiment, the passage width L2 in the vehicle width direction of the second passage 29 provided behind the tether 23 is such that the backrest portion 13 and the door of the seat 10 on which the occupant P sits. 17 is formed to have substantially the same width as that of the distance 17. Thereby, even if the second flow path 29 is inflated when the airbag 21 is deployed and inflated, the airbag 21 can be smoothly deployed between the backrest portion 13 and the door 17 while the flow path of the second flow path 29 is expanded. By setting the width L2 to the maximum, an amount of gas necessary for improving the stability when the airbag 21 is deployed can be flowed to the head protection part 25 through the second flow path 29.

  (3) In the side airbag device 20 of the present embodiment, the regulation means for regulating the expansion in the vehicle width direction of the portion corresponding to the shoulder portion of the passenger P is the base fabric 21a on the vehicle interior side and the vehicle interior side of the airbag 21. The tether 23 is connected to the base fabric 21b. For example, the length L1 of the tether 23 is set to a length that is slightly shorter than the distance between the shoulder portion of the passenger P and the door 17 of the vehicle. Therefore, it is possible to suitably protect the shoulder portion of the occupant P from the entry of the door 17 and the like while restricting the expansion of the portion of the airbag 21 corresponding to the shoulder portion of the occupant P.

  (4) In the side airbag device 20 of the present embodiment, the flow path cross-sectional area of the first flow path 28 is set to 3.0 to 4.5 times the flow path cross-sectional area of the second flow path 29. Therefore, since most of the gas supplied to the airbag 21 flows from the rear to the front through the chest protection part 26, the airbag 21 can be rapidly deployed and inflated from the rear to the front of the vehicle. Also, the amount of gas flowing through the second flow path 29 can be set to a sufficient amount for stably expanding and expanding the head protecting portion 25. Accordingly, both the chest and head of the occupant P can be suitably protected.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG.
In the side airbag device 20 of the first embodiment, the tether 23 provided at a portion corresponding to the shoulder portion of the occupant P in the deployed state of the airbag 21 extends substantially horizontally in the deployed state of the airbag 21. Was provided. On the other hand, in the second embodiment, as shown in FIG. 4, in the side airbag device 40, the tether 43 provided at the portion corresponding to the shoulder portion of the airbag 41 is arranged such that the front portion of the vehicle is on the rear side. It is formed diagonally so as to be higher than the part. Accordingly, when the airbag 41 is deployed and inflated, the gas discharged from the inflator 30 flows through the first flow path 48 and the second flow path 49 as indicated by arrows a and b in FIG. The gas flow can be made smoother without interfering with the gas flow.

According to this embodiment explained in full detail above, in addition to the effect of (1)-(4) described in the said 1st Embodiment, there can exist the following effect (5).
(5) In the present embodiment, the position of the tether 43 provided at the portion corresponding to the shoulder of the occupant P in the airbag 41 is higher in the front portion of the vehicle than the rear portion in the deployed state of the airbag 41. It is formed diagonally so that That is, in this embodiment, since the tether 43 is provided along the gas flow direction in the airbag 41, the gas flow can be made smoother.

(Other embodiments)
In addition, you may change the said embodiment suitably as follows.
-In each above-mentioned embodiment, the air bag is formed in the shape which expands and inflates corresponding to a chest from a crew member's head. However, the airbag may have a shape that expands and expands at least from the head of the occupant corresponding to the chest, and may be expanded and expanded from the head of the occupant to the waist. In other words, the airbag may have a shape in which the lower end of the airbag reaches the seat 12 of the seat 10.

  In each of the above embodiments, the tether is provided as a restricting means for restricting the expansion of the portion corresponding to the shoulder portion of the occupant in the airbag, but the restricting means is a seam that stitches together a pair of base fabrics constituting the airbag. There may be. Further, the shape of the tether or seam is not particularly limited.

  In each of the above embodiments, the side airbag device is accommodated in the backrest portion 13 of the seat 10 and the airbag is deployed and inflated from the side surface of the backrest portion 13, but the side airbag device is provided with the door 17. You may make it accommodate in vehicle side walls, such as a vehicle body.

  In each of the above embodiments, the flow path width L2 of the second flow path provided at the shoulder portion of the airbag is set to be approximately the same width as the distance between the back portion of the seat on which the occupant is seated and the passenger compartment side wall. However, the channel width of the second channel is not particularly limited. Even in this case, it is preferable that the channel width of the second channel is set to be equal to or smaller than the distance between the seat back portion and the passenger compartment side wall. Thereby, even if the second flow path is expanded when the airbag is deployed and inflated, the airbag can be smoothly deployed between the backrest portion and the compartment side wall.

The front view of the seat which shows the state before deployment of the airbag in the side airbag apparatus concerning the 1st Embodiment of this invention. The side view which shows the expansion | deployment state of an airbag in the side airbag apparatus concerning the 1st Embodiment. Sectional drawing in the AA line of FIG. 2 in the side airbag apparatus concerning the said 1st Embodiment. The side view which shows the deployment state of an airbag in the side airbag apparatus concerning the 2nd Embodiment of this invention. The side view which shows the deployment state of an airbag in the conventional side airbag apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Seat, 11 ... Slide rail, 12 ... Seat part, 13 ... Backrest part, 14 ... Headrest, 17 ... Door, 19 ... Case, 20, 40 ... Side airbag apparatus, 21, 41, 100 ... Air bag, 21a , 21b ... base fabric, 22 ... outer periphery seam, 23, 43, 111 ... tether, 24 ... arm support seam, 25, 115 ... head protection part, 26, 116 ... chest protection part, 28, 48 ... first flow path , 29, 49 ... second flow path, 30, 113 ... inflator.

Claims (5)

An airbag is provided that expands and inflates from the rear to the front of the vehicle between the occupant and the side wall of the passenger compartment corresponding to at least the occupant's head and chest when the vehicle collides. A side airbag device in which a restriction means for restricting expansion in the vehicle width direction is provided at a portion corresponding to the portion and gas from a gas generation source is supplied from below the restriction means during deployment and inflation,
When the airbag is deployed and inflated, a first flow path through which gas generated from the gas generation source flows is formed in front of the restricting means and the rear of the restricting means in the vehicle is more than the first flow path. A second channel having a small channel cross-sectional area is formed ;
The side airbag device according to claim 1, wherein the restricting means is provided so as to extend forward from a position corresponding to a front end portion of a seat back portion in a deployed state of the airbag. In claim 1,
The side airbag device according to claim 1, wherein the second passage has a width in the vehicle width direction that is substantially the same as a distance between a back portion of a seat on which the occupant sits and a side wall of the passenger compartment. In claim 1 or 2,
The side airbag device according to claim 1, wherein the restricting means is a tether that connects a portion of the airbag on the vehicle interior side and a region on the vehicle exterior side. In any one of Claims 1-3,
The side airbag device according to claim 1, wherein the restricting means is formed obliquely so that a front portion of the vehicle is higher than a rear portion of the vehicle when the airbag is deployed. 5. The flow path cross-sectional area of the first flow path is set to 3.0 to 4.5 times the flow path cross-sectional area of the second flow path. Side airbag device.

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