JP5606876B2 - Curtain airbag - Google Patents

Description

  The present invention relates to a curtain airbag that inflates and deploys along a side surface in a vehicle compartment for the purpose of protecting an occupant during a vehicle side collision or rollover (rollover).

  In recent years, high safety is required for vehicles. This trend is common throughout the world. Currently, curtain airbags are almost standard equipment around the world as a vehicle safety device. Further, in business operators related to vehicle development, further improvement in safety is listed as an important development theme, and new curtain airbags are being developed daily.

  Vehicle safety assessment standards vary from country to country, and each company is developing products to meet multi-country assessment standards. For example, in the United States, which has the largest number of automobiles in the world, FMTSS (Federal Automobile Safety Standards) has been established by NHTSA (National Highway Traffic Safety Administration). And now, NHTSA's schedule notification (NPRM) of the FMVSS rule that will be set forth in the future says “In the event of a side impact or rollover, the release mitigation system will reduce the likelihood of passengers getting out of the vehicle through the side windows. Has been proposed (FMVSS 226). This requirement can be achieved by providing a curtain airbag as an off-vehicle emission reduction countermeasure device that forms an emission reduction system.

  The curtain airbag is a curtain airbag that is installed above the door and inflates and deploys along the side window of the vehicle when an impact occurs. The inflating region of the curtain airbag is divided into a plurality of small chambers (chambers) in consideration of the ease of gas flow. For example, Patent Document 1 discloses a head protection curtain airbag device (curtain airbag) in which an end-side inflatable portion (end chamber) is inflated and deployed on the vehicle inner side than other chambers. In Patent Document 1, a tension cloth is passed from the expansion region on the center side in the vehicle front-rear direction to the front pillar through the outside of the end chamber. The tension cloth is tensioned when the curtain airbag is inflated and deployed, and moves so as to push the end chamber to the inside of the vehicle. According to Patent Document 1, the end chamber that has moved to the inside of the vehicle can provide accurate protection even when an occupant moves obliquely forward of the vehicle due to an impact.

JP 2008-6895 A

  Currently, there is a demand for curtain airbags to further improve the performance of preventing passengers from releasing outside the vehicle. As a response to FMVSS, it is considered effective to increase the stroke of the curtain airbag, that is, the width that expands from the side window to the vehicle interior side. The larger the stroke, the more the curtain airbag restrains the occupant at the point of action away from the side window toward the vehicle interior. Thereby, the protrusion amount of the curtain airbag to the outside of the vehicle can be suppressed, and the release prevention performance outside the vehicle can be improved.

  The curtain airbag described in Patent Document 1 protects an occupant's head early by assuming that the occupant's head moves in the longitudinal direction of the vehicle, with only the end chamber approaching the occupant's head. To do. However, it is especially the side chamber of the occupant that exhibits the effect of preventing the occupant from being released from the vehicle. In Patent Document 1, since the stroke of the chamber on the side of the occupant does not increase, it cannot be said that the occupant is restrained at the point of action away from the side window toward the inside of the vehicle, and the vehicle release performance is particularly improved. It's hard to say.

  To increase the chamber stroke, it is conceivable to increase the chamber capacity. However, since the capacity of the entire curtain airbag increases, it is inevitable that the inflator becomes large. There is also a limit to the size of the chamber.

  In view of such a problem, an object of the present invention is to provide a curtain airbag having improved out-of-vehicle release prevention performance without increasing capacity.

  In order to solve the above-described problem, a typical configuration of the present invention is a curtain airbag that is stored above a side surface in a vehicle compartment and inflates and deploys along the side surface. The curtain airbag is divided into a plurality of chambers. A folded chamber having a folded portion that is folded inside the vehicle, and a folded portion of the folded chamber is fixed to the curtain airbag itself in a folded state. And a fixing part.

  According to said structure, by providing the folding | turning part, a folding | turning chamber expand | swells doubly inside a vehicle, The stroke increases one chamber width compared with the stroke of a normal chamber. The occupant can be restrained at the operating point away from the side window to the inside of the vehicle by the folding chamber having a long stroke, and the ability of the occupant to release the vehicle outside the vehicle can be improved. Moreover, the folded portion of the folded chamber is essentially a folded portion that expands as part of a normal chamber. Therefore, the capacity of the curtain airbag does not increase.

  The curtain airbag further includes a belt-like tension cloth that is passed to the inside of the curtain airbag so as to straddle the folding chamber and the hollow portion that is hollowed out by folding the folding portion of the folding chamber. Both ends of the tension cloth may be connected to a portion other than the folding chamber of the curtain airbag, and when the curtain airbag is inflated, the tension cloth may be pushed to the inside of the vehicle by the folding chamber and be tensioned.

  According to the above configuration, when the curtain airbag is inflated, the portion of the tension cloth that straddles the folding chamber is pushed to the inner side of the large stroke by the folding chamber that double-expands. The portion straddling the folding chamber is pulled, and the portion straddling the cavity is also tense at the position moved to the inside of the vehicle. Thereby, a stroke can be secured even in the hollow portion. When the cavity overlaps with the B-pillar, there is no concern that the passenger will be released from the cavity, but when the cavity is formed facing the side window, there is a risk of emission outside the vehicle. . This can be prevented by a tension cloth provided with a stroke.

  The folding chamber may overlap with a pillar that protrudes inward from the side window on the side surface. Although the occupant is not released from the position of the pillar, the stroke of the folding chamber is maximized by the folding chamber overlapping with the pillar. When the tension cloth is provided, the tension cloth is pulled to the folding chamber having the maximum stroke to increase the stroke. The stroke increase amount of the tension cloth at this time is naturally larger than the stroke increase amount caused by the folding chamber that does not overlap the pillar. Therefore, the passenger's ability to prevent the passenger from being released from the vehicle by the tension cloth is further improved.

  The folding portion of the folding chamber may be folded back in either the front or back direction of the vehicle, or may be folded back in any direction of the vehicle top or bottom. According to such a configuration, the folding chamber can be installed at various places in the curtain airbag.

  ADVANTAGE OF THE INVENTION According to this invention, the curtain airbag which improved the vehicle outside discharge | release prevention performance without increasing a capacity | capacitance can be provided.

It is a figure which illustrates the curtain airbag concerning 1st Embodiment of this invention. It is an enlarged view of the curtain airbag of FIG.1 (b). It is a schematic sectional drawing of the curtain airbag in each embodiment of this invention. It is a figure which illustrates the curtain airbag concerning 2nd Embodiment of this invention. It is an enlarged view of the curtain airbag of FIG. It is a figure which illustrates the curtain airbag concerning 3rd Embodiment of this invention. It is an enlarged view of the curtain airbag of FIG. It is a figure which illustrates the comparative example used as the comparison object of each embodiment of this invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

(First embodiment)
FIG. 1 is a diagram illustrating a curtain airbag according to the first embodiment of the present invention. FIG. 1A illustrates the non-deployment of the curtain airbag 100 according to the first embodiment, and FIG. 1B illustrates the deployment of the curtain airbag 100. Hereinafter, all the embodiments will be described as a curtain airbag for the right side surface of the vehicle 102 as shown in FIG. 1, but the curtain airbag for the left side surface has a similar symmetrical structure.

  As illustrated in FIG. 1A, the curtain airbag 100 includes an inflator 104 that is a gas generator. The curtain airbag 100 is inflated by the pressure of the gas supplied from the inflator 104 to restrain the occupant. In particular, the curtain airbag 100 can improve the out-of-vehicle release prevention performance while suppressing the output required for the inflator 104.

  The curtain airbag 100 is in a state of being wound as shown in FIG. 1A or in a folded state (not shown). It is attached and stored. Usually, the roof side rail is covered with a roof trim and is not visible from the vehicle interior. The curtain airbag 100 is formed into a bag shape, for example, by sewing a base fabric constituting the surface of the curtain airbag 100 on the front and back sides or by spinning using OPW (One-Piece Woven).

  In the present embodiment, a vehicle 102 having two rows of seats (front seat 108 and rear seat 110 from the front of the vehicle) is illustrated as a vehicle on which the curtain airbag 100 is implemented. A plurality of side windows (side windows 114 and 116 from the front of the vehicle) are installed on the side surface of the vehicle 102. Pillars (columns) that support the roof (ceiling) are provided in the vehicle front-rear direction of each side window. These are called A pillar 120, B pillar 122, and C pillar 124 from the front of the vehicle 102.

  When a side collision or rollover (rollover) occurs in the vehicle 102, first, an ignition signal is transmitted to the inflator 104 due to an impact detected by a sensor (not shown) provided in the vehicle 102. Then, the explosive in the inflator 104 burns and the generated gas is supplied to the curtain airbag 100. When the curtain airbag 100 receives the gas from the inflator 104, the curtain airbag 100 is inflated and deployed downward along the side surface (side window 114, etc.) of the passenger compartment as illustrated in FIG. I do.

  FIG. 2 is an enlarged view of the curtain airbag of FIG. FIG. 2A illustrates the curtain airbag 100 as viewed from the inside of the vehicle, and FIG. 2B illustrates the curtain airbag 100 as viewed from the outside of the vehicle. FIG.2 (c) is BB sectional drawing of Fig.2 (a).

  As illustrated in FIG. 2A, a tab 130 is provided on the upper edge of the curtain airbag 100. The tab 130 is a band-shaped member used when the curtain airbag 100 is attached to the vehicle 102. The tab 130 is provided with a bolt hole 132 through which a bolt for fastening to the vehicle 102 is passed.

  The curtain airbag 100 has an inflating region 134 in which gas from the inflator 104 flows and inflates. The expansion region 134 is divided into a duct portion 136 serving as a gas flow path and a plurality of chambers 138a to 138g assumed to be in contact with the occupant by seam portions 140a to 140f which are non-expansion regions. Duct portion 136 extends in the vehicle front-rear direction on the upper edge side of curtain airbag 100. The chambers 138a to 138g are arranged at contact positions with the occupant that are assumed from the configuration of the side surface and the seat of the vehicle 102. The seam portions 140a to 140f are regions that do not inflate substantially in the vertical direction, and are formed by, for example, joining the base fabrics on the front and back of the curtain airbag 100.

(Folding chamber)
Of the chambers 138a to 138g, the chamber 138d has a folded portion 142 that is cut into a substantially U shape from the curtain airbag 100 and folded back to the vehicle interior side. Hereinafter, the chamber 138d is referred to as a folding chamber 138d. The folded portion 142 of the present embodiment in FIG. 2A is cut into a substantially U shape from the curtain airbag 100 by an upwardly projecting substantially U-shaped slit 144 illustrated in FIG. It is folded back at the position 146 on the lower side of the vehicle interior. Since the folded portion 142 is sewn into a bag shape when cut, it is not directly connected to the chamber around the slit 144. However, since the gas flows through the continuous internal space at the turn-back position 146, the turn-back portion 142 is still connected to the chamber around the slit 144, although not directly. In all the embodiments of the present invention, the configuration of the folded portion is the same as described above. This folding is illustrated by an arrow 147 in FIG. As a result of the formation of the folded portion 142, a hollow cavity 148 is formed.

  As illustrated in FIG. 2C, the curtain airbag 100 includes a fixing portion 150. The fixing portion 150 fixes the folding portion 142 of the folding chamber 138d to the curtain airbag 100 itself in a folded state. The folding portion 142 is fixed by the fixing portion 150 so that the folded portion 142 does not return to the original state even when the curtain airbag 100 is inflated. In this embodiment, the fixing portion 150 fixes the folding portion 142 to the remaining portion of the folding chamber 138d that is not folded by sewing. However, the folded portion 142 may be fixed anywhere on the curtain airbag 100.

  As described above, the folding chamber 138d expands in a state where the folding portion 142 is folded, so that the folding chamber 138d expands double inside the vehicle as shown in FIG. When the curtain airbag 100 is stored above the side surface of the vehicle, the curtain airbag 100 with the folded portion 142 folded is folded or wound and stored as shown in FIG.

(Tension cloth)
As illustrated in FIGS. 2A and 2B, the curtain airbag 100 further includes a tension cloth 152. The tension cloth 152 is a belt-like cloth that is passed inside the curtain airbag 100 so as to straddle the folding chamber 138d and the cavity 148. Both ends of the tension cloth 152 are connected to seam portions 140b and 140e, which are non-inflatable regions in this embodiment. Therefore, the tension cloth 152 straddles the normal chambers 138c and 138e. However, both ends of the tension cloth 152 may be connected to any part of the curtain airbag 100 as long as it is a part other than the folding chamber 138d, and may be passed across a normal chamber.

  FIG. 3 is a schematic cross-sectional view of a curtain airbag in each embodiment of the present invention. Fig.3 (a) is AA sectional drawing of Fig.2 (a). As illustrated in FIG. 3A, the tension cloth 152 has a length (with tension) that is pushed and tensioned by the folding chamber 138d toward the vehicle interior when the curtain airbag 100 is inflated.

  According to said structure, by providing the folding | turning part 142, the folding | turning chamber 138d expand | swells doubly inside a vehicle so that it may illustrate in Fig.3 (a). The stroke S1 is increased by one chamber width from the normal chamber. Thus, the occupant can be restrained at the operating point away from the side windows 114 and 116 by the folding chamber 138d having the long stroke S1, and it is possible to improve the occupant's release prevention performance from the vehicle. Moreover, the folded portion 142 of the folded chamber 138d is originally a folded portion that expands as a part of a normal chamber. Therefore, the capacity of the curtain airbag 100 does not increase.

  Further, as illustrated in FIG. 3A, the tension cloth 152 is pulled by the portion straddling the folding chamber 138 d, and the portion straddling the cavity 148 is also tense at the position moved to the vehicle interior side. As a result, a large stroke can be secured even in the cavity 148.

  In the present embodiment, the occupant is not released from the portion of the cavity 148 that overlaps the B pillar 122, but the portion of the cavity 148 that faces the side windows 114 and 116 is formed. There is a risk of release from the car. This can be prevented by the tension cloth 152 provided with a stroke.

  In the present embodiment, the folded portion 142 is folded downward, but may be folded upward in the vehicle. Thereby, the folding chamber can be installed at various places in the curtain airbag.

  In each embodiment of the present text, a belt-like cloth having a certain width is used as the tension cloth 152, but the tension cloth may be a strap shape as thin as a seat belt. By passing a plurality of such strap-like tension cloths, it is possible to prevent the passenger from being released from the vehicle.

(Comparative example)
FIG. 8 is a diagram illustrating a comparative example which is a comparison target of each embodiment of the present invention. FIG. 3D is a GG sectional view of FIG. The curtain airbag 10 of the comparative example is a curtain airbag including only a normal chamber. Therefore, the stroke S5 is smaller than the curtain airbag 100 stroke S1 according to the present embodiment, and it cannot be denied that the out-of-vehicle release prevention performance is inferior.

(Second Embodiment)
FIG. 4 is a diagram illustrating a curtain airbag according to the second embodiment of the present invention. FIG. 4 exemplifies the time when the curtain airbag 200 is deployed. In the following, the second embodiment will be described only with respect to differences from the first embodiment.

  FIG. 5 is an enlarged view of the curtain airbag of FIG. FIGS. 5A and 5B illustrate the curtain airbag 200 as viewed from the inside and the outside of the vehicle. FIG.5 (c) is DD sectional drawing of Fig.5 (a).

  Of the chambers 238a to 238g of the curtain airbag 200, the chamber 238d is a folded chamber 238d having a folded portion 242. The folded portion 242 of the present embodiment in FIG. 5A is cut into a substantially U shape from the curtain airbag 200 by a substantially U-shaped slit 244 that protrudes forward illustrated in FIG. At position 246, the vehicle is folded back toward the inside of the vehicle. As a result of forming the folded portion 242, a hollow portion 248 is formed. Similarly to the first embodiment, the folded portion 242 is also fixed by sewing to the remaining portion of the folded chamber 238d that is not folded, by the fixing portion 250 (FIG. 3B).

  As described above, the folding chamber 238d also has a folding direction different from that of the first embodiment, but expands in a state in which the folding portion 242 is folded. It will be.

  As illustrated in FIGS. 5A and 5B, the curtain airbag 200 further includes a tension cloth 252. The tension cloth 252 is passed to the inside of the curtain airbag 200 so as to straddle the folding chamber 238d and the cavity 248. Both ends of the tension cloth 252 are connected to seam portions 140c and 140e, which are non-inflatable regions in this embodiment. Therefore, the tension cloth 252 straddles the normal chamber 238e.

  FIG.3 (b) is CC sectional drawing of Fig.5 (a). As illustrated in FIG. 3B, the tension cloth 252 is pushed and tensioned by the folding chamber 238d when the curtain airbag 200 is inflated.

  According to said structure, as illustrated in FIG.3 (b), the folding | turning chamber 238d expand | swells doubly inside a vehicle interior, and stroke S2 is obtained. Since the long stroke S2 is obtained in this way, also in this embodiment, it is possible to improve the performance of preventing the passenger from releasing outside the vehicle without increasing the capacity of the curtain airbag 200.

  Further, as illustrated in FIG. 3B, the tension cloth 252 is pulled by the portion straddling the folding chamber 238 d and the portion straddling the cavity portion 248 is also tensioned at the position moved to the vehicle interior side. Accordingly, a somewhat large stroke S3 (there is a difference depending on the location of the tension cloth 252) can be secured even in the hollow portion 248.

  Also in this embodiment, release from the vehicle from the cavity 248 can be prevented by the tension cloth 252 provided with the stroke S3.

  In the present embodiment, the folded portion 242 is folded back, but may be configured to be folded forward of the vehicle. Thereby, the folding chamber can be installed at various places in the curtain airbag.

(Third embodiment)
FIG. 6 is a view illustrating a curtain airbag according to a third embodiment of the present invention. FIG. 6 illustrates the curtain airbag 300 when deployed. The third embodiment will be described below only with respect to differences from the first and second embodiments.

  FIG. 7 is an enlarged view of the curtain airbag of FIG. FIGS. 7A and 7B illustrate the curtain airbag 300 as viewed from the inside and the outside of the vehicle. FIG.7 (c) is DD sectional drawing of Fig.7 (a).

  In the curtain airbag 300, two chambers 338b and 338d among the chambers 338a to 338g are folded chambers 338b and 338d having folded portions 340 and 342, respectively. Of the two folding chambers of this embodiment, the folding portion 342 of one folding chamber 338d has the same structure as the folding portion 242 illustrated in FIG. That is, the curtain airbag 300 is cut into a substantially U shape by a substantially convex U-shaped slit 344 that is forwardly projected, and is further folded back toward the rear of the vehicle interior at a folding position 346. As a result of forming the folded portion 342, a hollow portion 348 is formed. Similarly to the second embodiment, the folded portion 342 is also fixed by sewing to the remaining portion of the folded chamber 338d that is not folded by the fixing portion 350 (FIG. 3C).

  Of the two folding chambers of the present embodiment, the folding portion 340 of the other folding chamber 338b is a curtain air by a substantially U-shaped slit 364 protruding rearward as illustrated in FIGS. 7 (a) and 7 (b). The bag 300 is cut into a substantially U shape, and is further folded back toward the rear of the vehicle interior at a folding position 366. As a result of forming the folded portion 340, a hollow portion 368 is formed. Similarly to the folded portion 342, the folded portion 340 is fixed to the remaining portion of the folded chamber 338b that is not folded by the fixing portion 360 (FIG. 3C).

  Thus, the curtain airbag 300 according to the present embodiment includes the two folding chambers 338b and 338d. These are folded in different directions such as the forward direction and the backward direction, respectively. However, since the folded portions 340 and 342 are expanded in a folded state, they are inflated inside the vehicle as shown in FIG. It will swell heavily. FIG. 7C illustrates only the folding chamber 338b, and the folding chamber 338d having the same configuration as the folding chamber 238d in FIG. 2 is not shown.

  As illustrated in FIGS. 7A and 7B, the curtain airbag 300 further includes a tension cloth 352. The tension cloth 352 is passed to the inside of the curtain airbag 300 so as to straddle the folding chambers 338b and 338d and the hollow portions 348 and 368 in a lump. Both ends of the tension cloth 352 are connected to seam portions 140a and 140d, which are non-expandable regions in this embodiment. Therefore, the tension cloth 352 also straddles the normal chamber 338c.

  FIG.3 (c) is EE sectional drawing of Fig.7 (a). As illustrated in FIG. 3C, the tension cloth 352 is pushed inward by the two folding chambers 338b and 338d when the curtain airbag 300 is inflated, and is tensioned in a state substantially parallel to the vehicle longitudinal direction.

  According to the above configuration, as illustrated in FIG. 3C, the folding chambers 338b and 338d are double-expanded inside the vehicle, and a stroke S4 is obtained. Since the long stroke S4 is obtained in this way, in this embodiment as well, it is possible to improve the performance of preventing the passenger from releasing outside the vehicle without increasing the capacity of the curtain airbag 300.

  In addition, the tension cloth 352 is also tensioned in a state substantially parallel to the vehicle front-rear direction at the position where the tension cross 352 moves over the hollow portions 348 and 368 at the position where the tension cross 352 moves to the vehicle interior side as described above. Accordingly, a large stroke S4 can be secured even in the hollow portions 348 and 368.

  Also in this embodiment, release from the vehicle from the cavities 348 and 368 can be prevented by the tension cloth 352 provided with the stroke S4.

  The curtain airbag 300 according to the present embodiment includes two folding chambers 338b and 338d, but the number of folding chambers is not limited. The curtain airbag 300 includes a single tension cloth 352 that straddles all the folded portions 340 and 342 and all the hollow portions 348 and 368. However, the number of tension cloths is not limited, and one tension cloth may be provided for each folding chamber.

(Folding chamber position)
Like the folding chambers 138d, 238d, 338d of the first to third embodiments of the present invention, the folding chamber may overlap the B pillar 122. The B pillar 122 protrudes from the side windows 114 and 116 toward the inside of the vehicle. Although the passenger is not released from the vehicle from the position of the B pillar 122, the folding chambers 138d, 238d, and 338d overlap with the B pillar 122, so that the stroke is maximized.

  The tension cloths 152, 252, and 352 are pulled by the folding chambers 138d, 238d, and 338d having the maximum stroke as described above, and the strokes are similarly increased. The stroke increase amount of the tension cloths 152, 252, and 352 at this time is naturally larger than the stroke increase amount due to the folding chamber (not shown) that does not overlap with the B pillar 122. Therefore, when the folding chambers 138d, 238d, and 338d that overlap with the B pillar 122 are present as in the first to third embodiments, the performance of preventing the passenger from releasing the vehicle by the tension cloths 152, 252, and 352 is further improved.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the embodiments described above are preferred examples of the present invention, and other embodiments can be implemented or performed in various ways. Can be carried out. The invention is not limited to the detailed shape, size, configuration, and the like of the components shown in the accompanying drawings unless otherwise specified in the present specification. In addition, expressions and terms used in the present specification are for the purpose of explanation, and are not limited thereto unless otherwise specified.

  Therefore, it is obvious for those skilled in the art that various changes and modifications can be conceived within the scope of the claims, and these naturally belong to the technical scope of the present invention. It is understood.

  Moreover, in the said embodiment, although the example which applied the curtain airbag concerning this invention to the motor vehicle was demonstrated, it is also possible to apply to an aircraft, a ship, etc. besides a motor vehicle, and can obtain the same effect. it can.

  INDUSTRIAL APPLICABILITY The present invention can be used for a curtain airbag that inflates and deploys along a side surface in a vehicle compartment for the purpose of protecting an occupant during a vehicle side collision or rollover (rollover).

DESCRIPTION OF SYMBOLS 100, 200, 300 ... Curtain airbag 102 ... Vehicle 104 ... Inflator 106 ... Roof side rail 108 ... Front seat 110 ... Rear seats 114, 116 ... Side window 120 ... A pillar 122 ... B pillar 124 ... C pillar 130 ... Tab 132 ... Bolt hole 134 ... Expansion region 136 ... Ducted portions 138d, 238d, 338b, 338d ... Folded chambers 140a to 140f ... Seams 142, 242, 340, 342 ... Folded portions 144, 244, 344, 364 ... Slits 148, 248 348, 368... Cavity portions 150, 250, 350, 360... Fixed portions 152, 252, 352.

Claims (4)

In a curtain airbag that is stored above a side surface in a vehicle compartment and inflates and deploys along the side surface,
A non-inflatable region that partitions the curtain airbag into a plurality of chambers;
A folding chamber that is one of the plurality of chambers and has a folded portion that is folded inside the vehicle;
A fixing portion for fixing the folded portion of the folding chamber to the curtain airbag itself in the folded state;
Equipped with a,
A belt-like tension cloth that is passed to the inside of the curtain airbag so as to straddle the folding chamber and the hollow portion that is hollowed out by folding the folding portion of the folding chamber;
The tension cloth, be coupled at both ends to a site other than the folding chamber of the curtain airbag, the Rukoto which have a length of the curtain air bag is tensioned by being pushed by the interior side by the folding chamber and expands Characteristic curtain airbag. 2. The curtain airbag according to claim 1 , wherein the folding chamber overlaps with a pillar that protrudes inward from a side window of the side surface portion. The curtain airbag according to claim 1 or 2 , wherein the folded portion of the folded chamber is folded in either the front or rear direction of the vehicle. 3. The curtain airbag according to claim 1, wherein the folded portion of the folded chamber is folded in either the upper or lower direction of the vehicle.

Images