Airbags

Abstract

To provide an airbag which can push up an arm during expansion and deployment regardless of a body type of an occupant.SOLUTION: An airbag 13 includes a bag-like airbag body 20 which is expanded and deployed to the side of an occupant H seated on a seat S by a gas being introduced thereinto. The airbag body 20 has multiple protruding parts 25 branched in a vehicle width direction in a deployment state at an upper part and has a base 24 which is common for these protruding parts at lower parts of the protruding parts 25. In a deployment state of the airbag body 20, an outer protruding part 30 is located at the same level with a shoulder SH of the occupant H or higher level than the shoulder SH and an inner protruding part 31 is located at a higher level than a lower end of an arm AR of the occupant H seated on the seat S in a normal manner.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an airbag having a bag-shaped airbag body that is inflated and deployed to the side of an occupant seated in a seat by the introduction of gas. [Background technology]

[0002] Conventionally, there have been known side-impact airbag devices that deploy an airbag to the side of an occupant seated in a car seat to protect the occupant during a side collision. In side-impact airbag devices, it is desirable to have the airbag push up the occupant's arms so that the arms are not interposed between the occupant and the airbag, thereby reducing the load (injury value) on the chest caused by the arms. In this regard, for example, a device is known in which the airbag is provided with an arm support edge that protrudes toward the occupant, and when the lower part of the occupant's arm abuts against the airbag during airbag deployment, the occupant's arm slides up along the airbag and rests on the arm support edge (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-132072 A (pages 4-5, Figures 1-3) Summary of the Invention [Problem to be solved by the invention]

[0004] Since occupants vary in physique, a configuration is required that allows the arms to be pushed up while taking into consideration the physique differences of occupants.

[0005] The present invention has been made in view of the above points, and has as its object to provide an airbag that can push up the arms of an occupant when inflated and deployed, regardless of the physique of the occupant. [Means for solving the problem]

[0006] The airbag described in claim 1 comprises a bag-shaped airbag body that is inflated and deployed by the introduction of gas to the side of an occupant seated in a seat, and the airbag body has a plurality of protrusions at an upper portion that branch out in the vehicle width direction when deployed, and a base portion common to the plurality of protrusions at the lower portions of the protrusions, The plurality of protruding portions include one protruding portion located on the vehicle exterior side and another protruding portion located on the vehicle interior side, and when the airbag body is in a folded state, the other protruding portion is folded back toward the vehicle interior side, In a deployed state of the airbag body, The aforementioned one thrust The department A side impact dummy specified in WorldSID-50M seated in the seat The shoulder is located at the same level as or above the shoulder. The aforementioned others thrust The department A side impact dummy specified by SID-IIs with the upper arm set at 45° was used. When the person is seated normally in the seat above It is located above the lower end of the arm.

[0007] The airbag according to claim 2 is the airbag according to claim 1, wherein one protrusion is folded back toward the outside of the vehicle cabin when the airbag body is in a folded state.

[0008] Claim 3 The airbag described in claim 1 or 2 In the airbag described, one The upper end of the protrusion But other The position where the one protrusion and the other protrusion are branched is above Side impact dummy specified by SID-IIs with arms set at 45° seat The above when seated normally in the seat above It is below the lower end of the arm. [Effects of the Invention]

[0009] According to the airbag of claim 1, gas is supplied quickly from a common base to each protrusion, causing the plurality of protrusions to be rapidly deployed, so that regardless of the physique of the occupant, one of the inflated and deployed protrusions protects the occupant's shoulders, while the upper ends of the other protrusions protect the occupant's shoulders. above You can push up your arms.

[0010] According to the airbag of claim 2, in addition to the effects of the airbag of claim 1, the base portion quickly deploys downward, and the other protrusions inflate and deploy upward from a position close to the occupant's body toward the outside of the vehicle cabin, and the expansion and deployment of one protrusion does not hinder the expansion and deployment of the other protrusions, so the other protrusions can reliably push up the upper arms.

[0011] Claim 3 According to the airbag described above, claim 1 or 2In addition to the effectiveness of the airbags described above, other protrusions located on the inside of the vehicle above The arm can be pushed up more reliably. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a side view showing an airbag according to a first embodiment of the present invention applied to a dummy for a side collision defined by SID-IIs, viewed from inside a vehicle compartment. [Figure 2] 2A and 2B are front views of FIG. 1, in which (a) shows the early stage of airbag deployment and (b) shows the later stage of airbag deployment. [Figure 3] 4A and 4B are cross-sectional views of the airbag, in which FIG. 4A shows the airbag when not inflated and FIG. 4B shows the airbag when inflated. [Figure 4] FIG. 2 is a side view showing the state in which the airbag is applied to a dummy for a side collision defined by WorldSID-50M, as viewed from inside the vehicle cabin. [Figure 5] FIG. 2 is a side view showing an example of a base fabric constituting the airbag. [Figure 6] FIG. 2 is a cross-sectional view schematically illustrating an example of the airbag in a folded state. [Figure 7] FIG. 6 is a side view showing an example of a base fabric constituting an airbag according to a second embodiment of the present invention. [Figure 8] 4A and 4B are cross-sectional views of the airbag, in which FIG. 4A shows the airbag when not inflated and FIG. 4B shows the airbag when inflated. DETAILED DESCRIPTION OF THE INVENTION

[0013] A first embodiment of the present invention will be described below with reference to the drawings.

[0014] In Fig. 1, reference numeral 10 denotes an airbag device. The airbag device 10 is attached to a seat S in the passenger compartment of an automobile, which is an attachment member, and constitutes a so-called side airbag device that inflates and deploys between an occupant H, who is a protected object seated in the seat S, and opposing objects such as the door trim and window of the vehicle body to protect the occupant H. Note that the occupant H is shown, for example, in Fig. 1 by a small-sized occupant dummy H1 specified in SID-IIs for a side collision, and in Fig. 4 by a large-sized occupant dummy H2 specified in WorldSID-50M for a side collision. These side impact dummies H1 and H2 are specified based on a predetermined standard, for example, 49 CFR Part 572, which is a standard of the National Highway Traffic Safety Administration (NHTSA). The occupant H has a chest CT including the arm (upper arm) AR, an abdomen AB, and a waist WA. The angle of the arm AR is a predetermined set angle specified in a side impact experiment, and is fixed, for example, at 45 degrees forward with respect to a reference line SL that is along the center of the arm AR positioned at the side of the body when the occupant H is viewed from the side. Furthermore, directions such as front / rear, both sides, and up / down are based on the straight-ahead direction of the automobile, with arrow F in Figure 1 etc. indicating the front, arrow R indicating the rear, arrow U indicating the up, arrow D indicating the down, and arrow WI in Figure 2(a) etc. indicating the inside of the vehicle cabin and arrow WO indicating the outside of the vehicle cabin.

[0015] The airbag device 10 shown in FIG. 1 includes an inflator 12 that generates and injects gas, an airbag 13 that inflates and deploys with the gas supplied by the inflator 12, a fixing device (not shown) that connects the inflator 12 and the airbag 13 and fixes them to the seat S, and a resin case body (not shown) that serves as a cover for storing these components.

[0016] The inflator 12 includes a substantially cylindrical main body 17 and a gas supply unit 18 protruding from one end of the main body 17. The other end of the main body 17 is provided with a terminal (not shown) for operating the inflator 12. The gas supply unit 18 is disposed at one end of the main body 17. In this embodiment, the inflator 12 is disposed with the gas supply unit 18 located below the main body 17.

[0017] The fixing device, which may also be called a retainer, is formed, for example, by bending a metal plate along the outer periphery of the inflator 12. With the inflator 12 held in place, a bolt, which serves as an attachment means, is passed through the airbag 13, and then inserted into a member such as a frame that constitutes the seat S, and a nut is screwed in and tightened, thereby fixing the fixing device, the inflator 12, and the rear end of the airbag 13 to the seat S.

[0018] As shown in FIGS. 1, 3(a), 3(b), and 4, the airbag 13 includes a bag-shaped airbag main body 20. The airbag main body 20 is formed of a plurality of base fabrics (panels) 21. These base fabrics 21 are overlapped and joined by sewing or the like near the outer periphery except for an opening 22 at the rear end, which serves as a component insertion portion. This results in the airbag main body 20 being configured in a bag-like shape that is flat in the vehicle width direction. The airbag main body 20 is also provided with a base 24 that inflates and deploys when gas is introduced to form a lower portion, and a plurality of protruding portions 25 that branch off from an upper portion of the base 24 in the vehicle width direction and form an upper portion. That is, in this embodiment, the airbag main body 20 includes a single base 24 that is common to the plurality of protruding portions 25. The plurality of protruding portions 25 are connected in parallel to the base 24.

[0019] The base 24 is a portion that protects the abdomen AB and lumbar region WA of the occupant H. A gas introduction portion 27 that communicates with the opening 22 and accommodates the inflator 12 is provided in the base 24. The gas introduction portion 27 is located at the rear end of the base 24 and serves as a rear terminal portion in the deployment direction of the airbag main body 20 (airbag 13). In addition, mounting holes 28 are formed near the rear end of the base 24, near the opening 22. The mounting holes 28 are arranged vertically in a row.

[0020] The protrusion 25 is a portion that protects the chest CT and / or shoulders SH of the occupant H. In this embodiment, the protrusion 25 includes an outer protrusion 30 that is one protrusion located on the outer side of the vehicle compartment, and an inner protrusion 31 that is another protrusion located on the inner side of the vehicle compartment. The outer protrusion 30 and the inner protrusion 31 are branched in the vehicle width direction from a branch portion 32 at the top of the common base 24.

[0021] The outer protrusion 30 is a portion that protects the shoulders SH of the occupant H. The outer protrusion 30 is configured in a bag shape that is flat in the vehicle width direction. When the outer protrusion 30 is inflated and deployed by introducing gas, the upper end of the outer protrusion 30 is positioned to extend upward more than the inner protrusion 31. Preferably, the upper end of the outer protrusion 30 is set to be positioned at the same level as or higher than the shoulder SH of the occupant H, i.e., the side collision dummy H2 defined in WorldSID-50M.

[0022] The inner protrusion 31 is a portion that protects the chest CT of the occupant H. The inner protrusion 31 is configured in a bag shape that is flat in the vehicle width direction.

[0023] Furthermore, the inward protrusion 31 has the function of pushing up the arms AR of a small occupant H when inflated and deployed by introducing gas. Therefore, the branch portion 32, which is the base point of the inward protrusion 31, is set to a position equal to or lower than the lower end of the arms AR of the occupant H, i.e., the side collision dummy H1 defined in SID-IIs, when the occupant H is normally seated in the seat S with the arms AR set at 45°. Furthermore, the inward protrusion 31 is set so that its upper end, when inflated and deployed by introducing gas, is positioned higher than the lower end of the arms AR of the occupant H, i.e., the side collision dummy H1, when the occupant H is normally seated in the seat S with the arms AR set at 45°.

[0024] The base fabric 21 constituting the airbag main body 20 may be set arbitrarily as long as it can form the base 24 and the protruding portions 25 (the outer protruding portions 30 and the inner protruding portions 31), but in this embodiment, as an example shown in Fig. 5, the base fabric 21 is set to a first base fabric 35, a second base fabric 36, a third base fabric 37, and a fourth base fabric 38. Note that the base fabric 21 may be set to have a tether or a heat patch.

[0025] As shown in Figures 3(a), 3(b), and 5, the first base fabric 35 is also called a vehicle outer panel, and is a part that constitutes the entire outer side of the airbag main body 20. The first base fabric 35 forms an opposing object-facing surface that faces an opposing object. The first base fabric 35 constitutes the outer side of the base 24 and the outer protrusion 30. The first base fabric 35 is formed elongated in the vertical direction. The first base fabric 35 determines the maximum length of the airbag main body 20 in the vertical direction. A mounting hole 28 is formed in the first base fabric 35 near the rear end.

[0026] The second base fabric 36 is also called a vehicle interior panel and constitutes the portion of the airbag body 20 facing the interior side of the vehicle cabin. The second base fabric 36 forms the occupant-facing surface that faces the occupant. The second base fabric 36 constitutes the interior side of the base 24 and the interior protrusion 31. The second base fabric 36 is formed elongated in the vertical direction. The second base fabric 36 is formed shorter in the vertical direction than the first base fabric 35. The second base fabric 36 has a mounting hole 28 formed near the rear end. In addition, the second base fabric 36 has a mounting hole 39 formed in front of the mounting hole 28 and toward the rear end of the second base fabric 36. The mounting hole 39 is aligned with the mounting hole 28 during manufacturing of the airbag body 20. The mounting hole 39 is arranged vertically in a row, similar to the mounting hole 28. The second base cloth 36 has its lower end aligned with the first base cloth 35, its lower side overlapping the lower side of the first base cloth 35, and the outer peripheral edge of the lower side excluding the rear end joined to the outer peripheral edge of the lower side of the first base cloth 35.

[0027] The third base cloth 37 and the fourth base cloth 38 are each located between the first base cloth 35 and the second base cloth 36 in the vehicle width direction. The third base cloth 37 is also called a (first) sub-vehicle inner panel, and is overlapped on the interior side of the first base cloth 35 to form the interior side of the outer protrusion 30. The third base cloth 37 has a vertical dimension that is less than half the vertical length of the first base cloth 35. The third base cloth 37 is formed in the same or approximately the same shape as the portion of the first base cloth 35 above the mounting hole 28. The upper end of the third base cloth 37 is aligned with the first base cloth 35, and the upper outer peripheral edge is joined to the outer peripheral edge of the upper side of the first base cloth 35.

[0028] The fourth base cloth 38 is also called the (other) sub-vehicle inner panel, and is overlaid on the outer side of the second base cloth 36 to form the outer side of the inner protrusion 31. The fourth base cloth 38 is formed in the same or substantially the same shape as the portion of the second base cloth 36 above the mounting hole 28. The fourth base cloth 38 has a vertical dimension that is less than half the vertical length of the second base cloth 36. The upper end of the fourth base cloth 38 is aligned with the second base cloth 36, and the upper outer peripheral edge is joined to the outer peripheral edge on the upper side of the second base cloth 36.

[0029] The third base cloth 37 and the fourth base cloth 38 are joined together at their lower ends. Therefore, the joint between the third base cloth 37 and the fourth base cloth 38 forms a branching portion 32 where the outer protruding portion 30 and the inner protruding portion 31 are branched at the protruding portion 25.

[0030] The airbag device 10 is then assembled by inserting the assembly combining the inflator 12 and the fixing device into the airbag main body 20, pulling the bolt of the fixing device out through the mounting hole 28 of the folded airbag main body 20, folding the rear end forward and further inserting the bolt into the mounting hole 28, and folding the airbag 13 into an appropriate state.

[0031] The airbag 13 may be folded in any manner. For example, as shown in FIG. 6 , the upper end of the outer protruding portion 30 (the portion where the first base fabric 35 and the third base fabric 37 are joined) of the protruding portion 25 is folded back toward the outside of the vehicle cabin, and the upper end of the inner protruding portion 31 (the portion where the second base fabric 36 and the fourth base fabric 38 are joined) is folded back toward the inside of the vehicle cabin. These folding methods may be alligator folding, in which the joined portion is folded into the interior of the airbag main body 20. The base 24 is also alligator folding, in which the lower end where the first base fabric 35 and the second base fabric 36 are joined is folded into the interior of the airbag main body 20. In this state, the airbag main body 20 is folded in any manner from the front end toward the rear, and stored in a case (not shown) as necessary. The airbag main body 20 is then stored in the side of the seat S shown in FIGS. 1 and 4 , and attached to the automobile seat S by fastening the bolts of the fasteners to a member such as the frame of the seat S using nuts or the like. Furthermore, the terminal portion of the inflator 12 of the airbag device 10 is connected, for example, via a harness, to a control device serving as control means provided on the vehicle side. The control device has a CPU and is connected to one or more sensors, which send an ignition signal to activate the inflator 12 depending on the occupant H and the state of the collision. The sensors may include a CCD camera, a weight sensor built into the seat S, and a seat slide / recline sensor that detects the fore-and-aft position and reclining state of the seat S, as needed, to detect the body shape and posture of the occupant H. The sensors also include collision detection sensors on the sides of the vehicle body to detect the state of the collision.

[0032] Therefore, when the vehicle receives an impact such as a side collision, the control device activates the inflator 12 in a state appropriate for protecting the occupant H based on the sensing signals of each sensor, and injects gas from the gas supply unit 18. Then, due to the pressure of this gas, the airbag 13 opens the cover, protrudes from the seat S, and inflates and deploys into the gap between the occupant H and an opposing object T such as a door trim or a window.

[0033] At this time, the gas injected from the gas supply section 18 of the inflator 12 toward the outer periphery is introduced from the gas introduction section 27 into the base 24 inside the airbag main body 20, and is then branched off in parallel and supplied directly from the base 24 to the outer protrusion 30 and the inner protrusion 31.In the initial stage of deployment, as shown in Figure 2(a), the base 24 deploys between the occupant H's abdomen AB and waist WA and an opposing object T, and the outer protrusion 30 deploys along the opposing object T to the vicinity of the occupant H's shoulder SH, and the inner protrusion 31 penetrates into the lower part of the occupant H's arm AR.

[0034] Next, in the later stage of deployment, as shown in Figure 2(b), the base 24 and the outer protrusion 30 expand in the vehicle width direction to restrain the abdomen AB and waist WA of the occupant H, the inner protrusion 31 deploys upward to push the arms AR of the occupant H upward, and the outer protrusion 30 restrains the shoulders SH of the occupant H, thereby protecting the occupant H.

[0035] In this way, multiple protrusions 25 that branch out in the vehicle width direction when deployed are set on the upper part of the airbag main body 20, and a common base 24 is set at the lower part of the protrusions 25, with one protrusion 25, the outer protrusion 30, positioned at the same level as or higher than the shoulder SH of the occupant H, and the other protrusion 25, the inner protrusion 31, positioned higher than the lower end of the arm AR of the occupant H when seated normally in the seat S. This allows gas to be quickly supplied from the base 24 to each protrusion 25, allowing the multiple protrusions 25 to be quickly deployed, and whether the occupant H is small or large, that is, regardless of the physique of the occupant H, the inflated and deployed outer protrusion 30 can protect the shoulder SH of the occupant H while the upper end of the inner protrusion 31 can push up the arm AR, thereby reducing the load (injury value) on the chest CT by the arm AR.

[0036] In this embodiment, the upper end of the outer protrusion 30, which is the protrusion 25 on the outside of the vehicle, is positioned higher than the upper end of the inner protrusion 31, which is the protrusion 25 on the inside of the vehicle, and the position of the branching portion 32 from which the protrusion 25 branches is set to be below the lower end position of the arm AR when a side impact dummy H1 specified in SID-IIs with the arm AR set to 45° is seated normally in the seat S, so that the upper end of the inner protrusion 31 can reliably push up the arm AR.

[0037] In particular, by setting the upper end of the inner protrusion 31, when inflated and deployed by the introduction of gas, to be higher than the lower end of the arm AR of the side impact dummy H1 specified in SID-IIs when the arm AR is set at 45° and the occupant H is seated normally in the seat S, the upper end of the inflated and deployed inner protrusion 31 can reliably push up the arm AR regardless of the physique of the occupant H.

[0038] Furthermore, by connecting the multiple protrusions 25 in parallel with the base 24, the inner protrusion 31, which is the protrusion 25 on the vehicle interior side, can be formed longitudinally upward from the base 24, thereby ensuring a pushing stroke for the arm AR.

[0039] Furthermore, by folding the airbag main body 20 so that the outer protrusion 30 is outward and the inner protrusion 31 is inward, and by folding the base 24 in an alligator fold, the base 24 quickly deploys downward, and the inner protrusion 31 deploys upward from a position close to the body of the occupant H towards the outside of the vehicle compartment, and since the expansion and deployment of the outer protrusion 30 does not hinder the expansion and deployment of the inner protrusion 31, it becomes possible for the inner protrusion 31 to reliably push up the arm AR.

[0040] Next, a second embodiment will be described with reference to Figures 7 and 8. Note that the same components and functions as those in the first embodiment will be denoted by the same reference numerals and the description thereof will be omitted.

[0041] In this embodiment, as shown in FIG. 7, the base cloth 21 constituting the airbag body 20 includes an outer base cloth 40, an inner base cloth 41, and a tether 42 serving as a connecting body.

[0042] The outer base fabric 40 is also called the outer main panel, and is the part that constitutes the entire outer side of the airbag body 20. The outer base fabric 40 forms the opposing object facing surface that faces an opposing object. The outer base fabric 40 constitutes the outer side of the vehicle cabin of the base 24 and the outer protruding portion 30. The outer base fabric 40 is formed elongated in the vertical direction. The outer base fabric 40 determines the maximum length of the airbag body 20 in the vertical direction. A mounting hole 28 is formed in the outer base fabric 40 near the rear end.

[0043] The inner base fabric 41, also called the inner main panel, constitutes the portion of the airbag body 20 facing the interior of the vehicle cabin. The inner base fabric 41 forms the occupant-facing surface and the side surface of the protruding portion 25 above the branch portion 32. The inner base fabric 41 is formed longitudinally in the vertical direction. The inner base fabric 41 is formed longer in the vertical direction than the outer base fabric 40. As shown in FIG. 8(a), the inner base fabric 41 has a pleat portion 46 formed in the vertical center thereof by folding a plurality of fold lines 45 along the front-rear direction into valley folds to form pleats that protrude into the interior of the vehicle cabin. In this embodiment, three fold lines 45 are set, and are spaced apart vertically at approximately equal intervals. As shown by the two-dot chain line in FIG. 7, the vertical length of the inner base fabric 41 is shortened when the pleat portion 46 is formed, so that the length of the inner base fabric 41 is approximately equal to that of the outer base fabric 40. Mounting holes 28 and 39 are formed in the inner base cloth 41 near the rear end. Then, with the pleated portions 46 formed, the inner base cloth 41 is overlapped with the outer base cloth 40 with the upper and lower ends aligned, and the entire outer peripheral edge excluding the rear end is joined to the outer base cloth 40, thereby forming the airbag main body 20 into a bag shape.

[0044] As shown in FIG. 8( a), the tether 42 is used to form the inner protrusion 31 by utilizing the pleat portion 46 of the inner base cloth 41. The tether 42 is located inside the airbag main body 20, between the outer base cloth 40 and the inner base cloth 41. The lower end of the tether 42 is connected to the lower end of the outer base cloth 40, and the upper end is connected to a fold line 45 that forms a recessed portion of the pleat portion 46 of the inner base cloth 41. In this embodiment, the tether 42 is connected to the inner base cloth 41 at the position of the uppermost fold line 45, and this connected portion constitutes the branch portion 32. As in the first embodiment, this branch portion 32 is located at a position equal to or lower than the lower end position of the arm AR of a side impact dummy H1 defined by SID-IIs with the arm AR set at 45° and seated normally in the seat S.

[0045] Then, due to the pressure of the gas supplied from the gas supply portion 18 of the inflator 12, the airbag 13 opens the cover, protrudes from the seat S, and inflates and deploys into the gap between the occupant H and the facing portion T.

[0046] When gas is introduced from the gas supply portion 18 of the inflator 12 into the base portion 24 through the gas supply portion 27 within the airbag main body 20 and then ejected further upward from the base portion 24, the pressure of the gas causes the outer base cloth 40 and the inner base cloth 41 to deploy upward. At this time, the position of the upper end of the pleat portion 46 of the inner base cloth 41 is restricted by the tether 42, so that the outer protrusion 30 is inflated toward the outside of the vehicle cabin by the outer base cloth 40 and the inner base cloth 41 at a position above the pleat portion 46, as shown in Fig. 8(b) , and the inner protrusion 31, whose upper end is positioned lower than the outer protrusion 30, is inflated toward the inside of the vehicle cabin relative to the outer protrusion 30 by the inner base cloth 41 at the pleat portion 46, and the pleat portion 46 enters under the arm AR of the occupant H, easily pushing the arm AR of the occupant H upward.

[0047] In this way, multiple protrusions 25 branching out in the vehicle width direction are set on the upper part of the airbag main body 20, a common base 24 is set at the lower part of the protrusions 25, and one of the protrusions 25, the outer protrusion 30, is positioned at the same level as or higher than the shoulder SH of the occupant H, while the other protrusion 25, the inner protrusion 31, is positioned higher than the lower end of the arm AR of the occupant H when seated normally in the seat S. By having a configuration similar to that of the first embodiment described above, it is possible to protect the shoulder SH of the occupant H while pushing up the arm AR when inflated and deployed regardless of the physique of the occupant H, and it is possible to achieve the same effects as the first embodiment.

[0048] Furthermore, when the airbag body 20 is inflated and deployed, the arms AR of the occupant H can rest on the slack in the pleats 46, so that the arms AR can be pushed up more easily.

[0049] Furthermore, since the base cloth 21 is made up of only the outer base cloth 40 and the inner base cloth 41, joining of the base cloths 21 by sewing or the like can be easily performed when forming the airbag body 20.

[0050] In the above-described embodiments, the shapes and configurations of the inflator 12 and the airbag 13 are not limited to those described above, and various configurations can be used. [Industrial Applicability]

[0051] The present invention is, for example, stored in the side of a car seat and deployed between the occupant and the door to It is used as a so-called side airbag to protect passengers. [Explanation of symbols]

[0052] 13 Airbag 20 Airbag body 24 base 25 Protrusion 30 Outer protrusion that is one protrusion 31 Other protrusions, medial protrusions AR arm H Crew H1 Side Impact Dummy S seat SH Shoulder

Claims

1. The airbag is equipped with a bag-shaped airbag body that inflates and deploys by introducing gas to the side of the occupant seated in the seat. the airbag body has, at an upper portion thereof, a plurality of protrusions that branch out in the vehicle width direction when deployed, and a base portion that is common to the plurality of protrusions at lower portions thereof; The plurality of protruding portions include one protruding portion located on the vehicle outer side and another protruding portion located on the vehicle inner side, When the airbag main body is in a folded state, the other protrusion is folded back into the vehicle interior, and when the airbag main body is in a deployed state, the one protrusion is located at the same level as or higher than the shoulder of a dummy for a side collision as defined in WorldSID-50M that is seated in the seat, and the other protrusion is located higher than the lower end of the upper arm of a dummy for a side collision as defined in SID-IIs with its upper arm at an angle of 45 degrees that is seated normally in the seat. An airbag characterized by:

2. When the airbag body is folded, one protrusion is folded back toward the outside of the vehicle compartment.

2. The airbag according to claim 1.

3. The upper end of one protrusion is located higher than the upper end of the other protrusion, The position where the one protrusion and the other protrusion are branched is below the lower end position of the upper arm of a side impact dummy defined by SID-IIs with the upper arm set at 45 degrees and seated normally in the seat.

3. The airbag according to claim 1 or 2.

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