JP2008044480A - Airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an airbag device capable of responding to various sitting positions and the sitting state by a simple structure. <P>SOLUTION: The airbag device of the present invention has an airbag 2 inflatable between an indoor structure object such as a windshield 11 and an instrument panel 12 and an occupant 1; and an inflator 3 for feeding a gas to the airbag 2. The airbag 2 has a first bag 4 arranged at an indoor structure object side; a second bag 5 arranged at an occupant 1 side; a gas feeding passage 6 for feeding the gas from the inflator 3 to the first bag 4 and the second bag 5; and vent holes 7 provided on each of the first bag 4 and the second bag 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an airbag device installed in a vehicle, and more particularly to an airbag device capable of effectively restraining an occupant regardless of the seating position or seating state of the occupant.

  The airbag device is a device that is stored in a steering wheel or an instrument panel of a vehicle, and that operates and deploys at the time of a vehicle collision to restrain an occupant. Recently, a device that is housed in a seat back side or a door and restrains an occupant in a side collision has been put into practical use. In any of the airbag devices, a bag is inflated between an occupant and an in-vehicle structure immediately after a vehicle collision, so that the impact received by the occupant from the vehicle body is reduced. Such an airbag device is one of the most important equipments together with a seat belt from the viewpoint of restraining an occupant.

  For example, various passengers such as men, women, adults, and children may be seated in the passenger seat of the vehicle, and the distance from the in-vehicle structures such as the instrument panel and windshield may differ due to differences in physique. Many. In an emergency such as a vehicle collision, the distance between the occupant and the in-vehicle structure may vary depending on the seating position and the seating state. Therefore, in order to restrain the occupant more effectively, it is necessary to design the airbag device in consideration of the occupant's seating position and seating state.

In the conventional airbag device, there are a method of detecting the seating position of an occupant by a sensor and controlling the inflation force of the airbag (see Patent Document 1), a method of inflating the airbag in two stages (see Patent Document 2), and the like. Proposed.
Japanese Patent Laid-Open No. 2-60858 JP 2005-329749 A

  In the invention described in Patent Document 1, a seat switch (detection means) that detects that an occupant is seated on a seat, and a proximity sensor that determines that an object is present within a predetermined distance from the seat front member ( Determining means) and control means for controlling the inflation force of the airbag, the airbag inflation force when the seat switch and the proximity sensor are ON, and the airbag when the seat switch is ON and the proximity sensor is OFF Control is made to be smaller than the expansion force (see page 3, upper right column, line 14 to lower left column, line 11 and FIG. 5).

  In the invention described in Patent Document 2, the first inflatable portion and the second inflatable portion are provided, and after the first inflatable portion completes the inflating, the second inflatable portion inflates toward the front side which is the instrument panel side. (See FIGS. 9 and 10). Therefore, depending on the seating position of the occupant, the occupant may come into contact with the rear surface side of the occupant protection part of the first inflating part before the expansion of the second inflating part is completed. In this case, the first inflating part Is in contact with the occupant, the expansion of the second expansion portion is restricted between the instrument panel and the first expansion portion, and the expansion is completed with a volume smaller than the maximum volume (see paragraph [0008]). ).

  In the airbag apparatus provided with the sensor as in Patent Document 1, there is a problem that the production of the sensor, the wiring work, the development of the control program, and the like increase the cost. Moreover, in the invention described in Patent Document 2, in order to reliably restrain the occupant, it is necessary to quickly complete the expansion of the first expansion part, but the capacity of the first expansion part is larger than the capacity of the second expansion part. And only the first inflating part contacts the occupant, the second inflating part is sandwiched between the first inflating part and the instrument panel, and the gas from the first inflating part to the second inflating part There is a problem that the supply path is temporarily cut off and the expansion of the second expansion portion is delayed.

  The present invention has been devised in view of the above-described problems, and an object thereof is to provide an airbag device that can cope with various seating positions and seating states with a simple structure.

  According to the present invention, in an airbag device having an airbag that is inflatable between an in-vehicle structure and an occupant, and an inflator that supplies gas to the airbag, the airbag is on the in-vehicle structure side. A plurality of bags that continue from the occupant side, a gas supply passage that supplies the gas to the bags, and a pressure adjusting means that adjusts the internal pressure when the bags are pressurized from the outside. An airbag device is provided.

  The gas supply path has one end connected to the inflator and the other end sequentially passing through the bag on the vehicle interior side and opening in the bag closest to the occupant side, and an outer periphery of the cylinder member The opening may be formed, or one end is connected to the inflator and the other end is sequentially connected to the inner surface of the bag closest to the passenger side through the inside of the bag on the vehicle interior side. You may be comprised from the cylindrical member and the opening part formed in the outer periphery of the part which passes each bag of this cylindrical member.

  As the pressure adjusting means, a vent hole provided in each bag or a retainer vent provided with a retainer that accommodates the inflator is employed. Moreover, it is preferable that the capacity | capacitance of the bag which expansion | swelling completes first shall be 50 to 70 liters. Moreover, you may make it comprise the said bag from the 1st bag arrange | positioned at the said vehicle interior structure side, and the 2nd bag arrange | positioned at the said passenger | crew side.

  According to the airbag apparatus of the present invention described above, any airbag can be preferentially inflated by separating the airbag into a plurality of bags and providing a gas supply path for supplying gas to each of the bags. At least the airbag can be inflated in two stages. Therefore, the bag necessary for restraining the occupant can be inflated without adding a special sensor or the like according to the seating position or seating state of the occupant, and the occupant can be restrained effectively. In addition, gas can be quickly supplied to each bag through the gas supply path so that the entire airbag can be smoothly inflated unless the occupant abuts against each bag to apply pressure to suppress the expansion of the bag. . Furthermore, the gas supply amount to each bag can be easily adjusted by the gas supply path.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. Here, FIG. 1 is an overall configuration diagram of the airbag apparatus of the present invention, FIG. 2 is a sectional view showing a first embodiment of the airbag, and FIG. 3 is a sectional view showing a second embodiment of the airbag. FIG. 4 is a cross-sectional view showing a third embodiment of the airbag.

  As shown in FIG. 1, the airbag device of the present invention supplies an airbag 2 that can be inflated between an in-vehicle structure such as a windshield 11 and an instrument panel 12 and an occupant 1, and gas to the airbag 2. The airbag 2 includes a first bag 4 disposed on the vehicle interior structure side, a second bag 5 disposed on the occupant 1 side, and the first bag 4 and the second bag 5. A gas supply path 6 for supplying gas and a vent hole 7 provided in each of the first bag 4 and the second bag 5 are provided. In addition, although the case where the airbag apparatus is installed in the passenger seat is described here, the present invention is not limited to this and can be applied to the driver seat and the rear seat.

  The airbag 2 is separated into a first bag 4 and a second bag 5, and the gas of the inflator 3 is supplied to the first bag 4 and the second bag 5 through the gas supply path 6. Either the bag or the second bag can be preferentially inflated. Hereinafter, a case where the first bag 4 is preferentially inflated will be described.

  The capacity of the airbag 2 (the sum of the capacities of the first bag 4 and the second bag 5) is designed in the range of about 90 to 130 liters as in the prior art, and the first bag 4 is about 50 to 70 liters. It is designed to have a capacity of liters, preferably around 60 liters. Considering various seating positions and seating states, it is possible to restrain the occupant only by inflating the first bag 4 having a capacity of about 60 liters at first, rather than inflating an airbag having a capacity of about 90 to 130 liters at a time. There is a case.

  The inflator 3 is housed in a retainer 13 installed on the instrument panel 12 and is connected to an ECU (electronic control unit) (not shown). The inflator 3 is ignited by an ignition current from the ECU and stored in the inflator 3. The generated medicine is burned to generate gas. The gas generated by the inflator 3 is supplied into the airbag 2 through a gas supply path 6 described later. The retainer 13 has a space for accommodating the airbag 2 and has a shape in which an upper portion is opened. The open portion is closed by a lid 14 and assembled in the instrument panel 12.

  When the occupant 1 comes into contact with the first bag 4 and the second bag 5, the vent hole 7 evacuates the gas in the first bag 4 and the second bag 5 so that the occupant is softly received. Pressure adjusting means for adjusting the pressure. The vent holes 7 are provided in about 2 to 4 locations on the side surfaces of the first bag 4 and the second bag 5. Further, as a pressure adjusting means, a retainer vent (not shown) for extracting gas when a predetermined pressure is applied to the retainer 13 instead of or in addition to the vent hole 7 may be provided. For example, the retainer vent has a structure in which a slit that can be opened and closed is formed in a part of the wall surface of the retainer 13 and the slit is opened when a predetermined pressure is reached.

  The configurations of the first bag 4, the second bag 5, and the gas supply path 6 will be described with reference to FIGS. FIG. 2 is a cross-sectional view showing the first embodiment, in which (A) shows a basic example and (B) shows a modification. As shown in FIGS. 2A and 2B, in the first embodiment, the first bag 4 and the second bag 5 are an annular reduced diameter portion 21 that connects the first bag 4 and the second bag 5. It is sewn with.

  In the basic example shown in FIG. 2 (A), the gas supply path 6 is constituted by a cylindrical member 22 having both ends opened, one end 22a of the cylindrical member 22 is connected to the inflator 3, and the other end 22b is the first. It passes through the bag 4 and is arranged in the second bag 5. A plurality of openings 22 c are formed on the outer periphery of the portion where the cylindrical member 22 passes through the first bag 4. The opening 22c is preferably arranged so as to release gas in the vertical direction, but the number, the size of the diameter, and the location of the opening 22c are the capacities of the first bag 4 and the second bag 5, and the gas of the inflator 3. It is designed according to the generation amount, the diameter of the cylindrical member 22, and the like, and is not limited to the illustrated example. Further, the first bag 4 is stitched to the outer periphery in the vicinity of the one end 22 a of the cylindrical member 22 to form an integral airbag 2.

  According to the configuration of the basic example of the first embodiment, gas is supplied to the first bag 4 through the opening 22c, and the other end 22b, the reduced diameter portion 21, and the cylindrical member are supplied to the second bag 5. Gas is supplied through a gap between the outer circumference of the 22. Here, in order to preferentially inflate the first bag 4, the airbag 2 is folded so that the resistance applied to the other end 22 b is larger than the resistance applied to the opening 22 c when the gas is supplied, The opening area is not made larger than the opening area of the other end 22b, the cylindrical member 22 is formed into a truncated cone shape to facilitate gas flow into the opening 22c, or the other end 22b is not fully opened until a predetermined pressure is reached. It is conceivable to sew with a tether or the like. A tether may be connected from the outer periphery of the cylindrical member 22 to the inner surfaces of the first bag 4 and the second bag 5 in order to inflate the first bag 4 and the second bag 5 in the vertical and horizontal directions.

  In the modification shown in FIG. 2 (B), the gas supply path 6 is constituted by a cylindrical member 23 having both ends opened, one end 23a of the cylindrical member 23 is connected to the inflator 3, and the other end 23b is the first. It passes through the bag 4 and the second bag 5 and is connected to the inner surface of the second bag 5 by sewing. A plurality of first openings 23 c are formed on the outer periphery of the portion where the cylindrical member 23 passes through the first bag 4, and a plurality of first openings 23 c are formed on the outer periphery of the portion where the cylindrical member 23 passes through the second bag 5. Two openings 23d are formed. The first opening 23c and the second opening 23d are preferably arranged so as to release gas in the vertical direction, but the number, the size of the diameter, and the arrangement location are the first bag 4 and the second bag. 5 is designed by the capacity of 5, the amount of gas generated by the inflator 3, the diameter of the cylindrical member 23, and the like, and is not limited to the illustrated example. Further, the first bag 4 is sewn to the outer periphery in the vicinity of the one end 23 a of the cylindrical member 23.

  According to the configuration of the modified example of the first embodiment, gas is supplied to the first bag 4 through the first opening 23c, and the second opening 23d and the reduced diameter portion are supplied to the second bag 5. Gas is supplied through a gap between 21 and the outer periphery of the cylindrical member 23. Here, in order to inflate the first bag 4 preferentially, the airbag 2 is folded so that the resistance applied to the second opening 23d is larger than the resistance applied to the first opening 23c when the gas is supplied. The total opening area of the first opening 23c is made larger than the total opening area of the second opening 23d, the cylindrical member 23 is formed into a truncated cone shape to facilitate the flow of gas into the first opening 23c, It can be considered that the cylindrical member 23 in the vicinity of the opening 23d is sewn with a tether or the like so as not to be fully opened until a predetermined pressure is reached. Furthermore, in the modified example, the other end 23b of the cylindrical member 23 is sewn to the inner surface of the second bag 5, so that the force that inflates the airbag 2 in the front-rear direction of the vehicle is restricted, and the upper-lower or left-right direction The airbag 2 can be inflated.

  FIG. 3 is a cross-sectional view showing a second embodiment of the airbag 2, wherein (A) shows a basic example and (B) shows a modification. As shown in FIGS. 3A and 3B, the first bag 4 and the second bag 5 are stitched together with an annular reduced diameter portion 21 that connects the first bag 4 and the second bag 5, and The reduced diameter portion 21 is sewn to the outer peripheral surface of the gas supply path 6 (the cylindrical member 22 or the cylindrical member 23). Since the structure of the other airbag 2 is the same as what was shown in 1st Embodiment, the overlapping description is abbreviate | omitted.

  According to the configuration of the basic example of the second embodiment shown in FIG. 3A, gas is supplied to the first bag 4 through the opening 22c, and to the second bag 5 through the other end 22b. Gas is supplied. Further, since the reduced diameter portion 21 is sewn to the outer peripheral surface of the cylindrical member 22, the force for expanding the first bag 4 in the front-rear direction of the vehicle is restricted, and the first bag 4 is expanded in the vertical and horizontal directions. be able to. Note that a tether may be connected from the outer periphery of the tubular member 22 to the inner surface of the second bag 5 in order to inflate the second bag 5 in the vertical or horizontal direction.

  Further, according to the configuration of the modified example of the second embodiment shown in FIG. 3B, gas is supplied to the first bag 4 through the first opening 23 c, and to the second bag 5. Gas is supplied through the second opening 23d. Further, in the modified example, not only the reduced diameter portion 21 but also the other end 23b of the cylindrical member 23 is stitched to the inner surface of the second bag 5, so that the first bag 4 and the second bag 5 are placed in the vehicle front-rear direction. The first bag 4 and the second bag 5 can be inflated in the vertical and horizontal directions by restricting the expanding force.

  FIG. 4 is a cross-sectional view showing a third embodiment of the airbag 2, wherein (A) shows a basic example and (B) shows a modification. As shown in FIGS. 4A and 4B, the first bag 4 and the second bag 5 are connected via a gas supply path 6, and the first bag 4 and the second bag 5 are each gas. It is stitched to the outer periphery of the supply path 6. Since the structure of the other airbag 2 is the same as what was shown in 1st Embodiment, the overlapping description is abbreviate | omitted.

  According to the configuration of the basic example of the third embodiment shown in FIG. 4A, gas is supplied to the first bag 4 through the opening 22c and to the second bag 5 through the other end 22b. Gas is supplied. Further, since both ends of the first bag 4 are sewn to the outer peripheral surface of the cylindrical member 22, the force for expanding the first bag 4 in the front-rear direction of the vehicle is restricted, and the first bag 4 is moved in the vertical and horizontal directions. Can be inflated. Note that a tether may be connected from the outer periphery of the tubular member 22 to the inner surface of the second bag 5 in order to inflate the second bag 5 in the vertical or horizontal direction.

  In addition, according to the configuration of the modification of the third embodiment shown in FIG. 4B, gas is supplied to the first bag 4 through the first opening 23 c, and to the second bag 5. Gas is supplied through the second opening 23d. Furthermore, in the modified example, since both ends of the first bag 4 and the second bag 5 are stitched to the cylindrical member 23, the force for expanding the first bag 4 and the second bag 5 in the front-rear direction of the vehicle is regulated, The first bag 4 and the second bag 5 can be inflated in the vertical and horizontal directions.

  Next, the deployment process of the airbag apparatus of the present invention will be described with reference to FIG. Here, FIG. 5 is a diagram showing a deployment process of the airbag device of the present invention, in which (A) is before deployment of the airbag 2, (B) is in the middle of deployment of the airbag 2, and (C) is airbag 2. After the expansion.

  As shown in FIG. 5 (A), the airbag 2 having any one of the configurations shown in FIGS. 2 to 4 has a predetermined space in a space formed by the retainer 13 and the lid 14 fitted in the instrument panel 12. Folded into shape and housed.

  When a vehicle collision sensor (not shown) is activated and an ignition current flows from the ECU to the inflator 3, the inflator 3 generates gas and starts supplying gas to the airbag 2 via the gas supply path 6. With the start of gas supply, the airbag 2 pushes open the lid 14 and is released into the vehicle, and starts to inflate. Since the airbag 2 is set so that the first bag 4 is inflated before the second bag 5, the first bag 4 is in contact with the windshield 11 as shown in FIG. Although the inflation is completed, the state where the second bag 5 is not completely inflated is maintained. When the occupant and the airbag 2 come into contact with each other within the expansion range of the first bag 4, the occupant is restrained by the expansion of the first bag 4. At this time, since pressure is applied to the airbag 2 from the outside by the occupant, the second bag 5 is inflated while the gas escapes from the vent hole 7, and the occupant is softly received.

  When the expansion of the first bag 4 is completed, next, the expansion of the second bag 5 is completed as shown in FIG. When the first bag 4 and the second bag 5 are inflated, the passenger can be effectively restrained when the passenger is normally seated. When the second bag 5 comes into contact with the occupant within the range of expansion, the occupant is restrained by the expansion of the first bag 4 and the second bag 5. In this case, since pressure is applied to the second bag 5 from the outside by the occupant, the second bag 5 is inflated while the gas escapes from the vent hole 7, and the occupant is softly received. Further, since the second bag 5 expands toward the occupant, the gas supply path 6 passing through the first bag 4 is not blocked by the vehicle interior structure other than the occupant, and the second bag 5 is quickly expanded. Can be made.

  Therefore, according to the airbag device of the present invention, it is possible to inflate the bag necessary for restraining the occupant without adding a special sensor or the like, according to the occupant's seating position or seating state, and effectively A passenger can be restrained. In addition, gas can be quickly supplied to each bag through the gas supply path so that the entire airbag can be smoothly inflated unless the occupant abuts against each bag to apply pressure to suppress the expansion of the bag. . Furthermore, the gas supply amount to each bag can be easily adjusted by the shape of the gas supply path.

  Then, the case where the airbag 2 is isolate | separated into three or more bags is demonstrated with reference to FIG. Here, FIG. 6 shows an embodiment in which the airbag 2 is separated into three or more bags, (A) is a series type, (B) is a parallel type, (C) is a multiple parallel type, and (D) is It is a top view which shows a loop type, (E) is a parallel series type, and (F) is a series parallel type. As shown in this figure, the airbag device of the present invention is not limited to the one separated into the first bag and the second bag shown in FIGS. 1 to 5, but as shown in FIGS. 6 (A) to (F). Various forms are possible. The gas supply path is not limited to those shown in the drawings, and it is needless to say that any type of gas supply path shown in FIGS.

  6A, the airbag is divided into three, the first bag 61 is arranged on the vehicle body structure side, and the second bag 62 and the third bag 63 are arranged in series on the occupant side in order and stitched. This is a series type airbag. One end of the gas supply path 70 is connected to an inflator (not shown), and the other end passes through the first bag 61, the second bag 62, and the third bag 63 and is connected to the inner surface of the third bag 63. In addition, it is composed of a cylindrical member having an opening formed on the outer periphery. In this case as well, the first bag 61 is preferably designed to have a capacity of about 50 to 70 liters. However, when the number of bags in series is large, the first bag 61 may be designed to be smaller.

  FIG. 6B shows that the airbag is divided into three, the first bag 61 is arranged on the vehicle body structure side, and the second bag 62 and the third bag 63 are arranged in parallel on the passenger side and stitched together. This is a type of airbag. One end of the gas supply path 70 is connected to an inflator (not shown), the other end passes through the first bag 61 and is connected to the inner surface of the first bag 61, and a cylindrical member having an opening formed on the outer periphery. It is configured. The gas supply path 70 is connected so that gas supply branch paths 70 a and 70 b for supplying gas to the second bag 62 and the third bag 63 communicate with each other. The other end of the gas supply branch 70a is connected to the inner surface of the second bag 62, and the other end of the gas supply branch 70b is connected to the inner surface of the third bag 63. Each opening is formed on the outer peripheral surface. Gas is supplied to the bags 62 and 63.

  6C, the airbag is divided into four, the first bag 61 is disposed on the vehicle body structure side, and the second bag 62, the third bag 63, and the fourth bag 64 are disposed in parallel on the occupant side. This is a multiple parallel type airbag that is stitched together. The gas supply path 70 basically has the same structure as that shown in FIG. 6B, but a gas supply branch path 70c is newly added. Here, the case where three bags are arranged in parallel (the second bag 62, the third bag 63, and the fourth bag 64) is illustrated, but four or more bags may be arranged in parallel.

  FIG. 6D shows that the airbag is divided into four, the first bag 61 is arranged on the vehicle body structure side, the second bag 62 and the third bag 63 are arranged in parallel on the occupant side, and further on the occupant side. A loop-type airbag in which the fourth bag 64 is disposed on the second bag 62 and the third bag 63 and stitched to both. It can also be said that the fourth bag 64 is arranged on the side of the parallel type passenger in FIG. The fourth bag 64 is supplied with gas through gas supply branch paths 70d and 70e branched from the gas supply branch paths 70a and 70b. Specifically, one end of the gas supply branch 70d is connected so as to communicate with each gas supply branch 70a, and the other end is connected to the inner surface of the fourth bag 64, and is formed on the outer peripheral surface. Gas is supplied to the fourth bag 64 through the opened opening. The gas supply branch 70e has the same structure as the gas supply branch 70d, and supplies gas to the fourth bag 64. In the case of the loop type, the fourth bag 64 can be inflated more quickly by supplying gas to the fourth bag 64 from both.

  In FIG. 6E, the airbag is divided into five, the first bag 61 is arranged on the vehicle body structure side, the second bag 62 and the third bag 63 are arranged in parallel on the passenger side, and the second bag This is a parallel series type airbag in which a fourth bag 64 and a fifth bag 65 are arranged in series in each of the bag 62 and the third bag 63 and stitched. Gas is supplied to the fourth bag 64 and the fifth bag 65 through gas supply branch paths 70a and 70b. Specifically, one end of the gas supply branch 70a is connected to communicate with the gas supply 70 and the other end is connected to the inner surface of the fourth bag 64, and an opening formed on the outer peripheral surface. Thus, gas is supplied to the second bag 62 and the fourth bag 64. The gas supply branch path 70 b has the same structure as the gas supply branch path 70 a, and supplies gas to the third bag 63 and the fifth bag 65. Note that an opening may be formed in a portion where the gas supply branch paths 70a and 70b pass through the first bag 61, and gas may be supplied to the first bag 61 also from the gas supply branch paths 70a and 70b. .

  In FIG. 6F, the airbag is divided into four, the first bag 61 is arranged on the vehicle body structure side, the second bag 62 is arranged in series on the passenger side, and the third bag 63 and the fourth bag are arranged. This is a series-parallel type airbag in which bags 64 are arranged in parallel on the passenger side and stitched. Gas is supplied to the third bag 63 and the fourth bag 64 through gas supply branch paths 70a and 70b. Specifically, one end of the gas supply branch 70a is connected to communicate with the gas supply 70 and the other end is connected to the inner surface of the third bag 63, and an opening formed on the outer peripheral surface. Thus, gas is supplied to the third bag 63. The gas supply branch path 70b also has the same structure as the gas supply branch path 70a, and supplies gas to the fourth bag 64. Note that an opening may be formed in a portion where the gas supply branch paths 70a and 70b pass through the second bag 62, and gas may be supplied to the second bag 62 also from the gas supply branch paths 70a and 70b. .

  Thus, by increasing the number of bags, the occupant can be restrained more finely according to the occupant's seating position and seating state. Although not shown, each bag in FIGS. 6A to 6F described above is provided with a vent hole, and when the occupant comes into contact, each bag is pressurized from the outside by the occupant. As a result, the gas escapes from the vent hole and the occupant is softly received. Moreover, you may make it provide a retainer vent as needed.

  The present invention is not limited to the above-described embodiment, and a bag other than the first bag (for example, the second bag 5) may be first inflated. It may be installed in the back of the seat of the driver's seat or the passenger's seat, or a bag arrangement combining the arrangements shown in FIGS. 6A to 6F may be adopted. It goes without saying that various modifications can be made without departing from the scope of the invention.

1 is an overall configuration diagram of an airbag device of the present invention. It is sectional drawing which shows 1st Embodiment of the airbag 2, (A) is a basic example, (B) has shown the modification. It is sectional drawing which shows 2nd Embodiment of the airbag 2, (A) is a basic example, (B) has shown the modification. It is sectional drawing which shows 3rd Embodiment of the airbag 2, (A) is a basic example, (B) has shown the modification. It is a figure which shows the expansion | deployment process of the airbag apparatus of this invention, (A) is before expansion | deployment of the airbag 2, (B) is in the middle of expansion | deployment of the airbag 2, (C) shows after expansion | deployment of the airbag 2. Yes. An embodiment in which the airbag 2 is separated into three or more bags is shown, (A) is a series type, (B) is a parallel type, (C) is a multiple parallel type, (D) is a loop type, and (E) is Parallel series type, (F) is a top view showing a series-parallel type.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Crew 2 Air bag 3 Inflator 4 1st bag 5 2nd bag 6 Gas supply path 7 Vent hole 11 Wind shield 12 Instrument panel 13 Retainer 14 Lid 21 Reduced diameter part 22, 23 Cylindrical member 22a, 23a One end 22b, 23b etc. End 22c Opening 23c 1st opening 23d 2nd opening 61 1st bag 62 2nd bag 63 3rd bag 64 4th bag 65 5th bag 70 Gas supply path 70a, 70b, 70c, 70d, 70e Gas supply branch Road

Claims (6)

In an airbag apparatus having an airbag that is inflatable between a vehicle interior structure and an occupant, and an inflator that supplies gas to the airbag,
The airbag includes a plurality of bags that are continuous from the interior structure side toward the occupant side, a gas supply path that supplies the gas to the bags, and an internal configuration when the bags are pressurized from the outside. An air bag device comprising pressure adjusting means for adjusting the pressure of the air bag.   The gas supply path has one end connected to the inflator and the other end sequentially passing through the bag on the vehicle interior side and opening in the bag closest to the occupant side, and an outer periphery of the cylinder member The airbag device according to claim 1, wherein the airbag device comprises an opening formed.   The gas supply path has one end connected to the inflator and the other end sequentially passing through the bag on the vehicle interior side and connected to the inner surface of the bag closest to the passenger side, and each of the cylinder members The airbag device according to claim 1, comprising an opening formed on an outer periphery of a portion passing through the bag.   The air according to any one of claims 1 to 3, wherein the pressure adjusting means is a vent hole provided in each bag or a retainer vent provided with a retainer that accommodates the inflator. Bag device.   The airbag device according to any one of claims 1 to 4, wherein the capacity of the bag that is initially inflated is 50 liters to 70 liters. The said bag consists of the 1st bag arrange | positioned at the said vehicle interior structure side, and the 2nd bag arrange | positioned at the said passenger | crew side, The Claim 1 thru | or 5 characterized by the above-mentioned. Airbag device.