JP5135938B2 - Air bag and air bag device - Google Patents

Description

  The present invention relates to an airbag including a vent hole that absorbs an impact by allowing gas to flow out from the inside of the airbag to the outside of the airbag, and a regulating member that regulates the outflow of gas from the vent hole. Moreover, this invention relates to the airbag apparatus provided with this airbag.

  A vent hole is provided in the airbag, and when a vehicle occupant or the like enters the inflated airbag, the vehicle occupant or the like is softened by the airbag by causing gas to flow out from the inside of the airbag through the vent hole. It is well known to accept this.

  In JP-A-6-127330, the vent hole is closed until the occupant contacts the occupant-facing surface of the inflated airbag, and the occupant contacts the occupant-facing surface of the inflated airbag. There is described an airbag configured such that a vent hole is opened when a facing surface is retracted.

  In the publication, vent holes are arranged on the side opposite to the occupant facing surface of the airbag. A slit is provided in the vicinity of the vent hole, and a strap is inserted through the slit. One end side of the strap passes through the inside of the airbag and is connected to the passenger facing surface of the airbag. The other end side of the strap is routed from the slit so as to cross the vent hole along the outer surface of the airbag, and is coupled to the outer surface of the airbag on the opposite side of the slit across the vent hole. ing.

  In the publication, when the airbag is inflated, the strap is pulled toward the inside of the airbag and becomes tensioned as the occupant-facing surface and the anti-occupant side surface of the airbag are separated. At this time, the other end of the strap is tensioned along the outer surface of the airbag and overlaps with the vent hole to close the vent hole. As a result, the outflow of gas from the vent hole is restricted, the pressure inside the airbag is quickly increased, and the airbag is rapidly deployed.

When the occupant comes into contact with the occupant-facing surface of the inflated airbag and the occupant-facing surface is retracted toward the inside of the airbag, the strap is loosened, and the other end of the strap is released from the vent hole by the gas pressure inside the airbag Get away. As a result, the vent hole is opened, and gas flows out of the airbag from the vent hole. As a result, the passenger is softly received by the airbag.
JP-A-6-127330

  In JP-A-6-127330, when a child seat is installed on the seat, the height of the child seat from the seat surface of the seat is lower than the height of the upper body of the occupant. When the bag is inflated, the child seat comes into contact with the lower part of the inflated airbag. In this case, the occupant-facing surface of the airbag is not pushed toward the inside of the airbag, so that the vent hole is not opened.

  A sensor is installed to determine whether an occupant is seated in the seat or a child seat is installed on the seat, and the inflator is not activated when it is determined that a child seat is installed on the seat. Has been implemented. However, in this case, the configuration cost of the airbag device increases.

  The present invention relates to the case where the open / close vent hole is opened or opened in any case when the occupant contacts the occupant-facing surface of the inflated airbag and when an object such as a child seat contacts the lower portion of the inflated airbag. An object of the present invention is to provide an airbag and an airbag apparatus.

  An airbag according to the present invention (Claim 1) is an airbag having an open / close vent hole and a restricting member for restricting gas outflow from the open / close vent hole, and the restricting member is located on the inner side of the airbag. In an airbag that opens or closes the open / close vent hole by applying a tension to the open / close vent hole and opens or opens the open / close vent hole by releasing the tension, , A first open / close vent hole for in-position collision and a second open / close vent hole for out-of-position collision are provided, and the gas from the first open / close vent hole is used as the restricting member. A first restricting member for restricting the outflow of gas and a second restricting member for restricting the outflow of gas from the second open / close vent hole are provided, and the first and second open / close vents are provided. Are disposed on the side opposite to the occupant-facing surface of the airbag when inflated, or on the side surface of the airbag, respectively, and pass through the interior of the airbag to the occupant-facing surface and the first restriction. A first connecting member that connects the member, and a second connecting member that connects the lower portion and the second regulating member when the airbag is inflated through the inside of the airbag, and when the airbag is inflated When the first connecting member is tensioned between the occupant-facing surface of the airbag and the first restricting member, a tension toward the inside of the airbag is applied to the first restricting member, and the first opening and closing is performed. The mold vent hole is closed or has a small opening, and the second connecting member is tensioned between the lower portion of the airbag and the second regulating member, so that the second regulating member is connected to the inner side of the airbag. Tension is applied to the second When the closed vent hole is closed or has a small opening and the occupant contacts the occupant-facing surface of the inflated airbag and the occupant-facing surface is retracted toward the inside of the airbag, the first connecting member And the tension on the first regulating member is released, whereby the first opening / closing vent hole is opened or opened to a large degree, and an object comes into contact with the lower portion of the airbag, and the lower portion is moved to the inside of the airbag. When retracted, the second connecting member loosens and the tension on the second regulating member is released, whereby the second open / close vent hole is opened or opened to a large degree. is there.

  The airbag according to claim 2 is the airbag according to claim 1, wherein the opening area when the second open / close vent hole is open or has a large opening is the open or large opening of the first open / close vent hole. It is characterized by being larger than the opening area at the time of being.

  The airbag according to claim 3 is the airbag according to claim 2, wherein the opening area when the second opening / closing vent hole is open or has a large opening is the opening or large opening of the first opening / closing vent hole. The opening area is 1.2 to 9 times larger than the opening area.

  According to a fourth aspect of the present invention, in the airbag according to any one of the first to third aspects, at least one of the first restricting member and the second restricting member covers the first open / close vent hole, respectively. And a second lid that covers the second open / close vent hole. When the airbag is inflated, the first lid is prevented from moving to the outside of the airbag by the first connecting member. 1 overlaps with the open / close vent hole, thereby closing or opening the first open / close vent hole and preventing the second lid from moving to the outside of the airbag by the second connecting member. And overlapped with the second open / close vent hole, whereby the second open / close vent hole is closed or opened to a small degree, and an occupant comes into contact with the occupant facing surface of the inflated airbag to On the inner side of the airbag In this case, the first connecting member is loosened, and the first lid is separated from the first open / close vent hole by the gas pressure inside the airbag, thereby opening the first open / close vent hole. Alternatively, when the opening is large and an object comes into contact with the lower part of the airbag and the lower part is retracted to the inner side of the airbag, the second connecting member is loosened and the second lid is The second open / close vent hole is separated from the second open / close vent hole by an internal gas pressure, thereby opening or opening the second open / close vent hole.

  The airbag according to claim 5 is the recess according to any one of claims 1 to 4, wherein when the airbag is completely inflated, a central portion in the left-right direction of the occupant-facing surface is a recess recessed toward the inside of the airbag. Each of the left and right sides of the recess has an expansion completed shape that is a bulging portion that bulges toward the occupant side of the recess, and the first connecting member includes at least one of the occupant-facing surfaces. The bulging portion and the first restricting member are connected to each other.

  The airbag device of the present invention (Claim 6) is an airbag device including an airbag and a gas generator for supplying gas to the airbag, and the airbag is any one of claims 1 to 5. It is an airbag as described in item, It is characterized by the above-mentioned.

  In the airbag and the airbag apparatus according to the present invention (inventions 1 and 6), when the airbag is inflated, the first connecting member is tensioned between the passenger facing surface of the airbag and the first regulating member. By doing so, the tension to the inside of the airbag is applied to the first restricting member, the first opening / closing vent hole is closed or opened to a small degree, and the second connecting member is connected to the lower portion of the airbag and the second restricting member. By tensioning with the member, tension is applied to the inner side of the airbag to the second restricting member, and the second open / close vent hole is closed or has a small opening. Thereby, the outflow of gas from each open / close vent hole is regulated, and the airbag is inflated quickly.

  When an occupant is seated on the seat at a normal seating position, the occupant contacts the occupant-facing surface of the inflated airbag. In the present invention, the collision mode in which the occupant contacts the occupant-facing surface of the airbag inflated in this way is called in-position collision. In this case, since the occupant facing surface is pushed by the occupant and retracts toward the inside of the airbag, the first connecting member is loosened between the occupant facing surface and the first restricting member. Therefore, the tension on the first regulating member is released, and thereby the first open / close vent hole is opened or has a large opening. As a result, gas flows out of the airbag from the first open / close vent hole, and the occupant is softly received by the airbag.

  Further, when an object such as a child seat is installed on the seat, the object contacts the lower part of the inflated airbag. In the present invention, a collision mode in which an object contacts the lower part of an inflated airbag is called an out-of-position collision. In this case, since the lower part of the airbag is pushed by the object and retracts toward the inner side of the airbag, the second connecting member is loosened between the lower part of the airbag and the second regulating member. Therefore, the tension on the second restricting member is released, and thereby the second open / close vent hole is opened or has a large opening. As a result, gas flows out of the airbag from the second open / close vent hole, and the internal pressure of the airbag decreases.

  As described above, in the airbag and the airbag apparatus of the present invention, even when an object such as a child seat comes into contact with the lower part of the inflated airbag, the second open / close vent hole is opened or opened to a large degree. Since gas flows out of the airbag from the two-open / close vent hole and the internal pressure of the airbag decreases, the lower part of the inflated airbag is prevented from pressing (including suppression; the same applies hereinafter). . Therefore, it is not necessary to configure the airbag device so that the airbag is not inflated at the time of an out-of-position collision, and the airbag device can be configured relatively inexpensively.

  In the present invention, the object refers to, for example, a child seat installed on the seat, but a part of the body of the occupant may contact the lower part of the airbag.

  Further, in the airbag and the airbag apparatus of the present invention, as described above, the dedicated open / close vent holes are opened at the time of in-position collision and at the time of out-of-position collision (from small opening to large opening). The same applies hereinafter.) Since the operation is performed, the first open / close vent hole is made a gas discharge characteristic suitable for in-position collision, and the second open / close vent hole is made a gas discharge characteristic suitable for out-of-position collision. By doing so, it is possible to discharge gas out of the airbag with appropriate gas discharge characteristics at the time of in-position collision and at the time of out-of-position collision.

  In the present invention, the opening area of the second opening / closing vent hole for the out-of-position collision is larger than the opening area of the opening of the first opening / closing vent hole for the in-position collision. Item 2) is preferred. In particular, the opening area of the second open / close vent hole is preferably 1.2 to 9 times the opening area of the first open / close vent hole (Claim 3).

  With this configuration, in the event of an out-of-position collision, gas is quickly discharged from the inflated airbag through the relatively large second open / close vent hole. On the other hand, it is possible to prevent excessive pressing force from being applied from the airbag.

  Further, since gas is discharged from the inflated airbag through the relatively small first open / close vent hole at the time of the in-position collision, the gas discharge from the airbag is suppressed more than at the time of the out-of-position collision. Therefore, it is possible to firmly restrain the occupant while softly receiving the occupant with the airbag.

  In the aspect of claim 4, at least one of the first restricting portion and the second restricting member respectively includes a first lid that covers the first open / close vent hole and a second lid that covers the second open / close vent hole; It has become. Such a lid has a simple structure. In the present invention, these lid bodies may cover the first opening / closing vent hole and the second opening / closing vent hole from the inside of the airbag, respectively, and the first opening from the outside of the airbag. The cover may cover the open / close vent hole and the second open / close vent hole.

  In the aspect of claim 5, when the airbag is inflated, a middle portion in the left-right direction of the occupant-facing surface of the airbag becomes a recessed portion recessed toward the inside of the airbag, and the left side and the right side of the recessed portion are more occupant than the recessed portion It becomes the bulging part which bulged to the side.

  As these bulges bulge toward the passenger, the first connecting member is tensioned between the first restricting member and at least one of the bulges. Thereby, the tension | tensile_strength to the airbag inner side is added to this 1st control member, and a 1st opening-and-closing type vent hole is closed or it becomes a small opening degree.

  At the time of in-position collision, the inflated airbag receives the left chest of the occupant on the left side bulge and the right chest of the occupant on the right side. There are hard and strong ribs on the left and right chests. That is, the airbag receives the occupant through the ribs. The vicinity of the sternum at the center of the occupant's chest faces each other in the recess between these bulging portions. Therefore, when the occupant's body rushes into the airbag, the area around the sternum of the chest is not subjected to such a large reaction force from the airbag, and the burden around the sternum is reduced.

  When the passenger seat occupant comes into contact with each inflated portion of the inflated airbag, each inflated portion is pushed by the occupant and retracts toward the inside of the airbag, so that the first connecting member is loosened, and the first The tension on the regulating member is released, and the first open / close vent hole is opened or has a large opening. Thereby, gas flows out of the airbag from the first open / close vent hole, and the occupant is softly received by the airbag.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 is a side view of the airbag according to the embodiment when inflated, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a sectional view taken along the line III-III in FIG. 4 and FIG. 4 are side views showing a state in which an occupant is in contact with the occupant-facing surface of the inflated airbag, FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 4, and FIG. FIG. 7 is a side view showing a state in which the child seat is in contact with the lower portion of the airbag, and FIG. 7 is a sectional view taken along line VII-VII in FIG.

  In this embodiment, the airbag 10 is a passenger airbag for a vehicle.

  The airbag 10 is folded and accommodated in the container 1, and is inflated by an inflator (gas generator) 2. The container 1 is installed on the instrument panel 3. The upper part of the container 1 is covered with a lid 4. Reference numeral 5 denotes a windshield.

  In this embodiment, the airbag 10 is opened and closed by a first lid 21 as a first restricting member on one side surface 10m when the airbag 10 is inflated (right side as viewed from the passenger side in this embodiment). There are provided a first open / close vent hole 11 for position collision and a second open / close vent hole 12 for out-of-position collision that is opened and closed by a second lid 22 as a second restricting member. In this embodiment, the first and second lids 21 and 22 cover the open / close vent holes 11 and 12 from the inner side of the airbag 10, respectively.

  In this embodiment, the second open / close vent hole 12 has a larger opening area when opened than the first open / close vent hole 11. The opening area when the second opening / closing vent hole 12 is opened is 1.2 times or more, particularly 1.5 times or more, especially 2 times or more, 3 more than the opening area when the first opening / closing vent hole 11 is opened. It is preferably at least twice, and at most 9 times, particularly preferably at most 6.5 times.

  In this embodiment, the open / close vent holes 11 and 12 are each formed of a circular opening, but the shape of each open / close vent hole 11 and 12 is not limited to this.

  In this embodiment, each of the lids 21 and 22 has a belt-like shape having a length and a width that can cover the entire open / close vent holes 11 and 12.

  As shown in FIG. 1, in this embodiment, the first lid 21 connects the occupant-facing surface 10f of the airbag 10 and the first open / close vent hole 11 when the airbag 10 is inflated. Extending across the first open / close vent hole 11. The end of the first lid 21 opposite to the occupant-facing surface 10f is on the side opposite to the occupant-facing surface 10f across the first open / close vent hole 11, and the side surface 10m of the airbag 10 (the inner surface of the airbag) ) With a seam 23. One end of the first tether 31 as the first connecting member is connected to the end of the first lid 21 on the passenger facing surface 10f side. The first tether 31 is routed around the interior of the airbag 10 toward the occupant facing surface 10f, and the other end is sewn to the occupant facing surface 10f (the inner surface of the airbag) by a seam 33.

  The second lid 22 extends across the second opening / closing vent hole 12 in a direction connecting the lower portion 10b of the airbag 10 and the second opening / closing vent hole 12 in a state where the airbag 10 is inflated. Exist. The end of the second lid 22 opposite to the lower part 10b is opposite to the side 10m (the inner side of the airbag) of the airbag 10 on the side opposite to the lower part 10b with the second open / close vent hole 12 in between. It is sewn by a seam 24. One end of a second tether 32 serving as a second connecting member is connected to the end of the second lid 22 on the lower portion 10b side. The second tether 32 is drawn around the interior of the airbag 10 toward the lower portion 10b, and the other end is sewn to the lower portion 10b (the inner surface of the airbag) by a seam 34.

  In this embodiment, the first lid 21 and the first tether 31 are integrally formed of a single band-shaped base fabric. Moreover, the 2nd cover body 22 and the 2nd tether 32 are also comprised integrally in series by one strip | belt-shaped base fabric. However, the lids 21 and 22 and the tethers 31 and 32 may be configured separately.

  In this embodiment, the first insertion portion 41 through which the middle portion of the first tether 31 is inserted and the middle portion of the second tether 32 are inserted through the side surface 10m (airbag inner surface) of the airbag 10. Two insertion portions 42 are provided. As shown in FIG. 3, the first insertion portion 41 is disposed closer to the occupant-facing surface 10f of the airbag 10 than the first open / close vent hole 11 and close to the first open / close vent hole 11. ing. Further, the second insertion portion 42 is disposed closer to the second opening / closing vent hole 12 on the lower portion 10b side of the airbag 10 than the second opening / closing vent hole 12.

  As shown in FIG. 3, in this embodiment, each insertion portion 41, 42 is formed of a small rectangular cross. These rectangular small crosses are arranged with the longitudinal direction intersecting with the extending direction of the tethers 31 and 32, and a pair of two side portions (both short sides) opposed to the longitudinal direction of the airbag 10. It is sewn on the side surface (inner side surface of the airbag) by seams 43 and 44. Each of the tethers 31 and 32 is drawn between the remaining pair of two sides facing each other in the short direction of the small cross and the side surface 10 m of the airbag 10.

  In addition, the structure of the insertion parts 41 and 42 is not limited to this. For example, although not shown, a pair of slits extending parallel to each other are provided on the side surface 10m of the airbag 10 as insertion portions, and each tether is passed through from one slit to the other slit. May be. Of course, other configurations are possible.

  The length of the first tether 31 and the second tether 32 is such that when the airbag 10 is inflated, the occupant facing surface 10f and the lower portion 10b of the airbag 10 are inflated toward the occupant side and downward, respectively. 31 and 32 are pulled to the inside of the airbag 10 and are tensioned, whereby the lids 21 and 22 are moved to the outside of the airbag 10 (the open / close vent holes 11 and 12 by the gas pressure in the airbag 10). The lids 21 and 22 are excessively pulled to the inside of the airbag 10 by the tethers 31 and 32 and the side surface 10m of the airbag 10 is pushed. It is set as the dimension which does not float up from (the inner surface of an airbag).

  Prior to inflation, the airbag 10 is folded in a state where the lids 21 and 22 overlap the open / close vent holes 11 and 12 from the inside of the airbag 10, and is accommodated in the container 1. .

  In the passenger seat airbag device provided with the airbag 10, the inflator 2 is actuated at the time of a vehicle collision or the like, and gas is supplied from the inflator 2 into the airbag 10 so that the airbag 10 starts to expand. To do. As shown in FIG. 1, the airbag 10 pushes open the lid 4 and deploys from the upper surface of the instrument panel 3 toward the passenger on the passenger seat.

  At this time, as shown in FIGS. 2 and 3, as the occupant facing surface 10f of the airbag 10 inflates toward the occupant, the first tether 31 is located between the occupant facing surface 10f and the first lid 21. get nervous. As a result, the first lid 21 is tensioned along the side surface 10m (the inner surface of the airbag) of the airbag 10 and overlaps the first opening / closing vent hole 11, and the opening / closing vent hole 11 is closed. Further, as the lower portion 10 b of the airbag 10 bulges downward, the second tether 32 is tensioned between the lower portion 10 b and the second lid body 22. As a result, the second lid 22 is tensioned along the side surface 10m (the inner side surface of the airbag) of the airbag 10 and overlaps the second opening / closing vent hole 12, and the opening / closing vent hole 12 is closed.

  As a result, the outflow of gas from the first open / close vent hole 11 and the second open / close vent hole 12 is restricted, and the airbag 10 is rapidly inflated.

  When an occupant is seated in a normal seating posture on the passenger seat, the passenger occupant comes into contact with the occupant facing surface 10f of the inflated airbag 10 as shown in FIGS. In this case, since the occupant facing surface 10f is pushed by the occupant and retracts to the inside of the airbag 10, the first tether 31 is loosened between the occupant facing surface 10f and the first lid 21. Then, the first lid 21 is pushed out to the outside of the airbag 10 by the gas pressure inside the airbag 10 as shown in FIG. As a result, the first open / close vent hole 11 is opened, and gas flows out of the airbag 10 from the first open / close vent hole 11 and the normally open vent hole 13. As a result, the occupant is softly received by the airbag 10.

  As shown in FIGS. 6 and 7, when the airbag 10 is inflated in a state where the child seat 6 is installed on the passenger seat, the height of the child seat 6 from the seat surface of the passenger seat is the upper body of the passenger. The child seat 6 contacts the lower portion 10b of the inflated airbag 10 because it is lower than the height.

  In this case, as shown in FIG. 6, the lower portion 10b of the airbag 10 is pushed by the child seat 6 and retracts toward the inner side of the airbag 10. Therefore, between the lower portion 10b of the airbag 10 and the second lid 22 The second tether 32 is loosened. Then, the second lid 22 is pushed out to the outside of the airbag 10 by the gas pressure inside the airbag 10 by the amount of the slack. As a result, the second open / close vent hole 12 is opened, and gas flows out of the airbag 10 from the second open / close vent hole 12 and the normally open vent hole 13. As a result, the pressure in the airbag 10 decreases.

  As described above, in the airbag 10, even when the airbag 10 is inflated in the state where the child seat 6 is installed instead of the passenger sitting on the passenger seat, the inflated airbag 10. When the child seat 6 comes into contact with the lower portion 10b of the airbag, the second opening / closing vent hole 12 is opened and the internal pressure of the airbag 10 is reduced, so that the lower portion 10b of the airbag 10 is prevented from pressing the child seat 6. The Therefore, it is not necessary to configure the airbag device so that the airbag 10 is not inflated at the time of an out-of-position collision, and the airbag device can be configured relatively inexpensively.

  In the airbag 10, as described above, the dedicated open / close vent hole 11 or 12 is opened during the in-position collision and the out-of-position collision, so the first open / close vent hole 11 is a gas discharge characteristic suitable for in-position collision, and the second open / close vent hole 12 is a gas discharge characteristic suitable for out-of-position collision. It is possible to discharge the gas to the outside of the airbag 10 with a good gas discharge characteristic.

  In this embodiment, the opening area when the second opening / closing vent hole 12 for out-of-position collision is opened is larger than the opening area when the first opening / closing vent hole 11 for in-position collision is opened. It has become a thing. Particularly in this embodiment, the opening area when the second opening / closing vent hole 12 is opened is 1.2 times or more, particularly 1.5 times or more than the opening area when the first opening / closing vent hole 11 is opened, In particular, it is 2 times or more, further 3 times or more, 9 times or less, especially 6.5 times or less.

  Therefore, at the time of an out-of-position collision, gas is quickly discharged from the inflated airbag 10 through the relatively large second opening / closing vent hole 12, so that an object in contact with the lower portion 10b of the airbag 10 is prevented. It is possible to prevent excessive pressing force from being applied from the airbag 10.

  In addition, since gas is discharged from the inflated airbag 10 through the relatively small first open / close vent hole 11 at the time of in-position collision, gas emission from the airbag 10 is suppressed more than at the time of out-of-position collision. Is done. Therefore, it is possible to firmly restrain the passenger while softly receiving the occupant with the airbag 10.

  FIG. 8 is a horizontal sectional view of an airbag according to another embodiment.

  In the airbag 10A of this embodiment, when inflation is completed, the vicinity of the center in the left-right direction of the occupant-facing surface becomes a recess 14 recessed toward the inside of the airbag, and the left and right sides of the recess 14 are the recess 14 respectively. In addition, it has an expansion completed shape that becomes the bulging portions 15L, 15R bulging further toward the occupant side.

  In this embodiment, first open / close type vent holes 11L and 11R for in-position collision are provided on the left and right side surfaces of the airbag 10A, respectively. Also in this embodiment, the first opening / closing vent holes 11L, 11R are respectively provided in the first lids 21L, 21R covering the first opening / closing vent holes 11L, 11R from the inside of the airbag 10A as a regulating member. Is provided.

  In this embodiment, the left first lid 21L is connected to the left bulging portion 15L of the airbag 10A by the left first tether 31L as the first connecting member, and the right first lid 21R is used as the first connecting member. The right first tether 31R is connected to the right bulging portion 15R of the airbag 10A.

  Specifically, also in this embodiment, each of the first lids 21L and 21R has a belt-like shape having a length and a width that can cover the entire first opening / closing vent holes 11L and 11R. Each first lid 21L, 21R extends across each first open / close vent hole 11L, 11R in the direction connecting each first open / close vent hole 11L, 11R and each bulging portion 15L, 15R. ing. The ends of the first lids 21L and 21R opposite to the bulging portions 15L and 15R are respectively opposite to the bulging portions 15L and 15R across the first opening / closing vent holes 11L and 11R. The seams 23L and 23R are sewn to the left and right side surfaces (the inner side surface of the airbag) of the airbag 10A.

  One ends of the first tethers 31L and 31R are connected to the end portions on the bulging portions 15L and 15R side of the first lid bodies 21L and 21R, respectively. Also in this embodiment, each of the first lids 21L, 21R and each of the first tethers 31L, 31R are each configured integrally with a single belt-like base fabric. However, the first lids 21L and 21R and the first tethers 31L and 31R may be provided separately.

  Also in this embodiment, the insertion portions 41L and 41R are provided on the bulging portions 15L and 15R side of the first opening / closing vent holes 11L and 11R, respectively, and the insertion portions 41L and 41R are respectively provided with the first portions. Tethers 31L and 31R are inserted. Also in this embodiment, each insertion portion 41L, 41R is composed of a small rectangular cross, and each short side is defined by having each longitudinal direction as a crossing direction with the longitudinal direction of each tether 31L, 31R. Each seam (not shown) is sewn to each side surface (inner side surface of the airbag) of the airbag 10A. However, the structure of each insertion part 41L and 41R is not limited to this.

  The left first tether 31L is inserted into the insertion portion 41L on the left side surface (inner side surface of the airbag) of the airbag 10A and is routed toward the left bulging portion 15L, and the other end side is connected to the left side by the seam 33L. It is sewn to the bulging portion 15L (the inner surface of the airbag). The right first tether 31R is inserted into the insertion portion 41R on the right side surface (inner side surface of the airbag) of the airbag 10A and is routed toward the right bulging portion 15R, and the other end side is seam 33R. It is sewn to the right side bulging portion 15R (the inner side surface of the airbag).

  The lengths of the first tethers 31L and 31R are such that when the airbag 10A is inflated, the first tethers 31L and 31R are attached to the airbag 10A as the bulging portions 15L and 15R bulge toward the occupant. As a result, the first lids 21L and 21R move outward from the airbag 10 (by the gas pressure in the airbag 10A, the airbags 10A from the first open / close vent holes 11L and 11R). And the first lids 21L and 21R are excessively pulled inside the airbag 10A by the first tethers 31L and 31R, respectively. The dimensions are such that they do not float from the side (inner side of the airbag).

  Although not shown in the drawings, the left and right side surfaces of the airbag 10A are further provided with second open / close vent holes for out-of-position collision, respectively. Each of these second open / close vent holes is also covered with a second lid from the inside of the airbag 10A, and each second lid is a second connecting member that passes through the interior of the airbag 10A. Two tethers are connected to the left half side and the right half side of the lower portion (the inner side surface of the airbag) of the airbag 10A.

  The other configuration of the airbag 10A and the configuration of the airbag apparatus provided with the airbag 10A are the same as those in the embodiment shown in FIGS.

  When the airbag 10A is inflated, the occupant-facing surface of the airbag 10A becomes a recess 14 that is recessed toward the inside of the airbag near the middle in the left-right direction. It becomes the bulging parts 15L and 15R which bulged to.

  As these bulges 15L and 15R bulge toward the occupant side, between the left first lid 21L and the left bulge 15L, and between the right first lid 21R and the right bulge 15R. Then, the first tethers 31L and 31R are tense. Accordingly, the left first lid 21L and the right first lid 21R overlap the left first open / close vent hole 11L and the right first open / close vent hole 11R, respectively, and the first open / close vent holes 11L and 11R are formed. Closed.

  Moreover, although illustration is abbreviate | omitted, each 2nd tether tension | tenses between each 2nd cover body and the lower part of airbag 10A in connection with the lower part of airbag 10A expanding below. Thereby, each 2nd cover body overlaps with each 2nd opening-and-closing type vent hole, and each 2nd opening-and-closing type vent hole is closed.

  As a result, the outflow of gas from the first open / close vent holes 11L and 11R and the second open / close vent holes is restricted, and the airbag 10A is rapidly inflated.

  At the time of the in-position collision, the inflated airbag 10A has the left bulging portion 15L receiving the left chest of the occupant and the right bulging portion 15R receiving the right chest of the occupant. There are hard and strong ribs on the left and right chests. That is, the airbag 10A receives an occupant through this rib. The vicinity of the sternum at the center of the occupant's chest faces each other in the recess 14 between the bulging portions 15L and 15R. Accordingly, when the occupant's body has plunged into the airbag 10A, the chest sternum is not subjected to such a large reaction force from the airbag 10A, and the burden around the sternum is reduced.

  When the passenger seat occupant comes into contact with the inflated portions 15L and 15R of the inflated airbag 10A, the inflated portions 15L and 15R are pushed by the occupant and retreat to the inner side of the airbag 10A. The first tethers 31L and 31R are loosened between the bulging portions 15L and 15R and the first lid bodies 21L and 21R. Then, the first lid bodies 21L and 21R are pushed out of the airbag 10A by the gas pressure in the airbag 10A by the amount of the slack. As a result, the first open / close vent holes 11L and 11R are opened, and the gas flows out of the airbag 10A from the first open / close vent holes 11L and 11R. As a result, the occupant is softly received by the airbag 10A.

  In the airbag 10A, when the left bulging portion 15L is pushed toward the inside of the airbag, the left first opening / closing vent hole 11L opens, and the right bulging portion 15R moves toward the inside of the airbag. Since the first opening / closing vent hole 11R on the right side is opened by being pushed, even if the occupant contacts only one of the left bulging portion 15L or the right bulging portion 15R, the left opening / closing vent hole 11L and the right side At least one of the open / close vent holes 11R is always opened, so that the occupant can be softly received by the airbag 10A.

  Although illustration is omitted, even when the airbag 10A is inflated with the child seat installed on the passenger seat, the child seat contacts the lower portion of the inflated airbag 10A. When the lower part of the airbag 10A is pushed by the child seat and retracts to the inner side of the airbag 10A, each second tether is loosened between the lower part of the airbag 10A and each second lid. Then, the second lid is pushed out of the airbag 10A through the second open / close vent holes by the gas pressure in the airbag 10A by the amount of the slack. Accordingly, each second open / close vent hole is opened, and gas flows out of the airbag 10A from each second open / close vent hole. As a result, the pressure in the airbag 10A decreases.

  Each of the above embodiments shows an example of the present invention, and the present invention is not limited to each of the above embodiments.

  In each of the embodiments described above, a lid that covers the open / close vent hole from the inside of the airbag is provided as a restrict member that restricts the outflow of gas from the open / close vent hole. It is not limited to. For example, the regulating member may be a lid that covers the open / close vent hole from the outside of the airbag. Alternatively, the restricting member is disposed at the peripheral portion of the open / close vent hole and is pulled to the inside of the airbag to tie the open / close vent hole to close or open the open / close vent hole. May be. Of course, the restricting member may have other configurations.

  In each of the embodiments described above, the lid closes the entire open / close vent hole, but the open / close vent hole may be changed from a large opening to a small opening. For example, even when the lid body overlaps with the open / close type vent hole, the open / close type vent hole may partially protrude from the lid body, and gas may be allowed to flow out from the protruding portion. Alternatively, a hole having a smaller diameter than the open / close vent hole is provided at a position overlapping the open / close vent hole in the lid so that gas can flow out through the hole even when the open / close vent hole is closed. May be.

  In each of the above embodiments, the occupant-facing surface of the airbag and each first lid, and the lower portion of the airbag and each second lid are connected by a tether as one connecting member. These may be connected by more than one tether.

  In the present invention, the tether as the connecting member may be in the form of a string or may be in the form of a strip made of cloth or the like. Of course, a connecting member other than a tether may be used.

  In each of the above embodiments, each vent hole is a substantially circular opening, but the shape of each vent hole is not limited to this, and may be a shape other than a circle, for example, a slit shape. Good.

  In the present invention, a hanging strap or the like is provided inside the airbag to connect the occupant-facing surface and the non-occupant side of the airbag, and the amount of bulging of the occupant-facing surface to the occupant side during inflation You may make it do.

  Each of the above embodiments is an application example of the present invention to an airbag and an airbag device for a passenger seat of a vehicle, but the present invention includes various other airbags and airbag devices, For example, the present invention can be applied to an air bag and an air bag device for a driver seat or a rear seat of a vehicle.

It is a side view at the time of expansion | swelling of the airbag which concerns on embodiment. It is sectional drawing which follows the II-II line of FIG. It is sectional drawing which follows the III-III line of FIG. It is a side view which shows the state which the passenger | crew contacted the passenger | crew opposing surface of the airbag of FIG. It is sectional drawing which follows the VV line of FIG. It is a side view which shows the state which the child seat contacted to the lower part of the airbag of FIG. It is sectional drawing which follows the VII-VII line of FIG. It is a horizontal sectional view at the time of expansion of an airbag concerning another embodiment.

Explanation of symbols

10, 10A Airbag 10b Lower portion of airbag 10f Airbag occupant facing surface 10h, 10m Airbag side surface 11, 11L, 11R First open / close vent hole 12 Second open / close vent hole 21, 21L, 21R First lid Body 22 Second lid 31, 31L, 31R First tether as first connecting member 32 Second tether as second connecting member

Claims (6)

An airbag having an open / close vent hole and a restricting member for restricting gas outflow from the open / close vent hole,
The regulating member is an air that closes or opens the open / close vent hole by applying tension to the inside of the airbag and opens or opens the open / close vent hole by releasing the tension. In the bag,
As the open / close vent holes, there are provided a first open / close vent hole for in-position collision and a second open / close vent hole for out-of-position collision,
As the regulating member, a first regulating member that regulates the outflow of gas from the first open / close vent hole and a second regulating member that regulates the outflow of gas from the second open / close vent hole are provided. And
The first and second open / close vent holes are respectively disposed on the side opposite to the occupant facing surface of the airbag when inflated, or on the side surface of the airbag.
A first connecting member that connects the occupant-facing surface and the first restricting member through the interior of the airbag, and a first connecting member that connects the lower portion and the second restricting member when the airbag is inflated through the interior of the airbag. 2 connecting members are provided,
When the airbag is inflated, the first connecting member is tensioned between the occupant-facing surface of the airbag and the first regulating member, thereby applying tension to the inside of the airbag on the first regulating member. When the first opening / closing vent hole is closed or has a small opening, and the second connecting member is tensioned between the lower portion of the airbag and the second restricting member, the second restricting member is opened. The tension to the inside of the airbag is applied to the member to close the second open / close vent hole or to a small opening,
When the occupant comes into contact with the occupant-facing surface of the inflated airbag and the occupant-facing surface is retracted toward the inside of the airbag, the first connecting member is loosened and the tension on the first regulating member is released. Thus, the first open / close vent hole opens or has a large opening,
When an object comes into contact with the lower portion of the airbag and the lower portion is retracted toward the inner side of the airbag, the second connecting member is loosened and the tension on the second restricting member is released. An air bag characterized in that a two-open / close vent hole is opened or has a large opening.   The opening area when the second opening / closing vent hole is open or has a large opening is larger than the opening area when the first opening / closing vent hole is opening or has a large opening. An airbag characterized by that.   3. The opening area when the second opening / closing vent hole is open or has a large opening is defined as 1. Opening area when the first opening / closing vent hole is open or has a large opening. An airbag characterized by being 2 to 9 times. 4. The first lid member and the second open / close type vent hole according to claim 1, wherein at least one of the first restriction member and the second restriction member is a first lid body that covers the first open / close type vent hole, respectively. A second lid covering
When the airbag is inflated, the first lid is prevented from moving to the outside of the airbag by the first connecting member and overlaps with the first opening / closing vent hole, thereby the first opening / closing vent hole. Is closed or has a small opening, and the second lid member is prevented from moving to the outside of the airbag by the second connecting member, and overlaps the second open / close vent hole, whereby the second lid The open / close vent hole is closed or has a small opening,
When the occupant comes into contact with the occupant-facing surface of the inflated airbag and the occupant-facing surface is retracted toward the inside of the airbag, the first connecting member is loosened, and the first lid is the airbag. Due to the internal gas pressure, the first open / close vent hole is separated from the first open / close vent hole, thereby opening or opening the first open / close vent hole.
When an object comes into contact with the lower part of the airbag and the lower part is retracted toward the inner side of the airbag, the second connecting member is loosened, and the second lid is caused by the gas pressure inside the airbag. An air bag which is separated from the second open / close vent hole, thereby opening or opening the second open / close vent hole. 5. The airbag according to claim 1, wherein when the airbag is completely inflated, a central portion in the left-right direction of the occupant-facing surface is a recessed portion recessed toward the inside of the airbag, and a left side and a right side of the recessed portion are Each has an expansion completion shape that becomes a bulging portion that bulges to the occupant side from the recess,
The airbag is characterized in that the first connecting member connects at least one of the bulging portions of the occupant-facing surface and the first regulating member. In an airbag device comprising an airbag and a gas generator that supplies gas to the airbag,
The airbag device according to any one of claims 1 to 5, wherein the airbag is the airbag device.

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