WO2004069586A1

WO2004069586A1 - Inflator bag for occupant-restraining device, method for installing the inflator bag, and occupant waist portion-restraining device

Info

Publication number: WO2004069586A1
Application number: PCT/JP2004/001083
Authority: WO
Inventors: Koji Korechika
Original assignee: Autoliv Development Ab
Priority date: 2003-02-06
Filing date: 2004-02-03
Publication date: 2004-08-19
Also published as: JP4089918B2; JPWO2004069586A1; KR100894233B1; KR20050093845A; CN1747853A; CN100450818C

Abstract

An inflator bag for an occupant-restraining device, having excellent heat resistance without impairing ability to be stowed; an installation structure for the inflator bag; and an occupant waist portion-restraining device using the inflator bag. In an inflator bag for an occupant-restraining device for restraining an occupant in a motor vehicle, the bag is inflated and expanded by a gas filled in it. The inflator bag has a metal layer formed on the inner surface with which the gas is in contact and a body sheet including a reinforcement cloth layer with excellent flexibility laminated on the outer side of the metal layer. The body sheet has a bag-like form.

Description

Description Inflation overnight bag for occupant restraint, its mounting structure, and occupant lumbar restraint

The present invention relates to an inflation overnight bag for an occupant restraint device, and more particularly to an occupant lumbar restraint device installed in a seat cushion to restrain an occupant's lumbar portion in the event of a vehicle collision, and to a lower portion of an instrument panel. The present invention relates to an inflation overnight bag suitable for being applied to an occupant leg restraint device that restrains an occupant's leg during a vehicle collision. The present invention also relates to an inflator bag mounting structure and an occupant lumbar restraint using the inflatable bag. Background art

When a vehicle collides forward, the occupants try to move forward due to inertia. When the occupant wears a seat belt, the restraining action of the shoulder belt and the waist belt of the seat belt can restrain the occupant from moving forward to a considerable extent, but this may not always be sufficient.

In order to prevent the occupant from moving forward, when the vehicle suddenly decelerates due to a forward collision or the like, the front end of the seat cushion is immediately raised to limit the occupant's forward movement. However, this is known, for example, in Patent Document 1, Patent Document 2, and Patent Document 3. Further, occupant leg restraint devices for protecting a leg of an occupant moving forward are known, for example, in Patent Documents 4 and 5. FIG. 5 shows a conventional example of an occupant waist restraint device. (A) shows the state before expansion and expansion, and (b) shows the state after expansion and expansion. In the figure, reference numeral 1 denotes a seat frame, and a concave portion 1a which is recessed when viewed from above is provided at a front portion of the seat frame 1, and a metal sheet 2 is provided on an upper surface thereof so as to cover the concave portion 1a. It is attached by welding or bonding. In this example, the inflation overnight bag 3 is composed of the metal sheet 2 and the seat frame 1, and the gas generated by the inflation overnight 4 is filled into the interior space of the inflation overnight bag 3. I have. In a vehicle equipped with this occupant's lumbar region restraint device, when the vehicle suddenly decelerates due to a forward collision or the like, the inflation overnight 4 operates to send high-pressure gas to the inflator bag 3. Then, the metal sheet 2 constituting the inflation overnight bag 3 is inflated and deployed, and the front seating surface of the seat cushion 6 is raised, thereby preventing the occupant M sitting on the seat from moving forward.

Figure 6 shows a conventional example of an occupant leg restraint system (also called a knee airbag system). (A) shows the state before expansion and expansion, and (b) shows the state after expansion and expansion. In the figure, 11 is an instrument panel, 12 is a cover panel, and 13 is a cover—an airbag module built in the back of the panel 12. The airbag module 13 is equipped with an inflation overnight bag (airbag body) 14 and an inflation overnight 15, and the gas generated by the inflation overnight 15 fills the inside of the inflation overnight bag 14. It is supposed to be.

In the vehicle equipped with the occupant leg restraint device, when the vehicle suddenly decelerates due to a forward collision or the like, the inflation overnight 15 operates to send high-pressure gas into the inflation overnight bag 14. Then, the inflation overnight bag 14 expands and deploys, pushing out the cover panel 12, thereby restraining the leg N of the occupant sitting on the seat, and causing an impact when the leg collides with the in-vehicle equipment. To relax.

By the way, when the inflation overnight bag of this type of occupant restraint is constructed as a single metal part, conventionally, as shown in FIG. 7, two metal sheets 21 and 22 are welded (dotted line 23). Indicates the welded portion), or as shown in Fig. 8, it is welded by sandwiching a bellows 25 between two metal sheets 21 and 22 to secure the amount of expansion. It is common to configure. When the inflator bag configured as described above is to be mounted on a vehicle, the inflator bag is assembled in advance into the inflator bag to be modularized, and then mounted on the vehicle.

[Patent Document 1]

'' Japanese Unexamined Patent Publication No.

[Patent Document 2]

Japanese Patent Application Laid-Open No. H10-10-2178818 [Patent Document 3]

UK Patent GB 2 3 5 7 4 6 6

[Patent Document 4]

Japanese Patent Application Laid-Open No. H8-41017

[Patent Document 5]

Japanese Patent Application Laid-Open No. 9-1123 857

However, the inflation overnight bag shown in Fig. 7 is constructed by laminating two metal sheets 21 and 22 and then welding around them, making the production cumbersome and costly. There was a problem of becoming. In addition, the inflation overnight bag shown in Fig. 8 was further constructed by welding a bellows 25 between two metal sheets 21 and 22. However, there was a problem that the cost was higher.

When an inflation overnight bag is made of metal sheets, it has a problem that it is difficult to fold before inflation and the storage capacity is poor. On the other hand, when an inflation overnight bag is made of a fabric, it has good heat resistance to withstand high-temperature gas, although it has excellent storage capacity.

In view of the above circumstances, the present invention provides an inflation overnight bag for an occupant restraint device, a mounting structure thereof, and an occupant lumbar restraint using the inflation overnight bag, without impairing the accommodation capacity and heat resistance. The purpose is to do. Disclosure of the invention

The inflator bag for an occupant restraint device according to claim 1 is an inflator bag for an occupant restraint device that restrains an occupant in a vehicle by being inflated and deployed by filling with gas. A main body sheet including the formed metal layer and a flexible cloth layer having excellent flexibility laminated outside the metal layer is provided, and the main body sheet is formed into a bag shape.

In this case, a flexible thin film sheet such as an aluminum sheet can be used as the metal thin film sheet. A sewing cloth can be used as the reinforcing cloth. Examples of resin include polyethylene, polypropylene, polyester, polyamide Etc. are available. In addition, as a method of bonding the main body sheet when forming the bag, a method such as adhesion and heat fusion can be adopted.

The inflation overnight bag of the present invention is formed of a main body sheet formed by laminating a metal thin film sheet on the inner surface and laminating a reinforcing cloth in a layered form, compared to a bag formed simply of a resin-only sheet. As a result, it can withstand high pressure and high temperature during gas filling sufficiently, and the reliability as an inflation overnight bag can be improved. Further, since it is molded as a flexible bag, it can be compactly mounted on a vehicle in a flat crushed form.

The inflation overnight bag for an occupant restraint device according to the invention of claim 2 is the inflation overnight bag according to claim 1, wherein the bag body has a rectangular shape in a plan view and two wide-sided sheets joined to each other at one of two opposite sides, The other two opposing sides of the wide portion sheet are composed of two left and right gore portion sheets for securing the expansion height joined to the edges of the front and back two wide portion sheets. The wide sheet is formed so as to be inflatable into a substantially cylindrical curved surface having a vertex at the center wide portion of each of the gore portion sheets by forming the central sheet in a generally rhombic shape having a wide center. I do.

In the inflation overnight bag, since the gore sheet is provided, the wide sheet having a rectangular shape in a plan view can be inflated into a substantially cylindrical curved surface at the time of inflation and deployment by introducing high-pressure gas. (Expansion allowance) can be secured, and the degree of energy absorption can be increased.

The inflatable bag for an occupant restraint device according to the third aspect of the present invention, according to the second aspect, is characterized in that at least one of the wide portion sheets has a plurality of narrow portions parallel to a joint of two opposing sides of the wide portion sheets. The width pockets are arranged closely adjacent to each other, and a strip plate made of a harder material than the main body sheet is inserted into each narrow width pocket. In this case, as the strip plate, a hard resin plate 硬質 metal plate or the like can be used.

In this inflation overnight bag, a plurality of strip plates made of a hard material are arranged on the wide sheet which expands into a substantially cylindrical curved shape when inflated and deployed by introducing high-pressure gas. It can be evenly transmitted to the occupants. Therefore, it is possible to efficiently absorb the impact from the occupant, and to improve the occupant protection performance be able to. In other words, when the strip plate is not provided, the wide portion sheet is flexible, so that the unconstrained central portion tends to swell up (that is, the wide portion sheet tends to expand into a spherical shape). However, if a strip plate is provided, the wide sheet expands into a substantially cylindrical curved shape (that is, it expands not only at the center but also at an even height to the end), so that it is wide. The occupant can be evenly supported by the area, and the impact energy from the occupant can be efficiently absorbed. In addition, by using a plurality of strip plates, the bulge of the wide-width section sheet can be maintained in a substantially cylindrical curved surface, so that the expansion and deployment performance is not hindered.

The inflation evening bag for an occupant restraint according to the invention of claim 4 is the invention according to claim 3, wherein the length of each of the strip plates is set longer at a central portion in the arrangement direction and shorter at an end portion. It is characterized in that the four corners of the bag are released from the restraint by the strip plate.

In this inflation overnight bag, the length of the strip plate is set so as to be shorter at the end in the arrangement direction, and the four corners of the bag are released from the restraint by the strip plate. It is possible to prevent excessive force from being applied during inflation, and to enhance the inflation performance of the inflatable bag.

An inflation evening bag for an occupant restraint device according to the invention of claim 5 is the inflation evening bag according to any one of claims 2 to 4, wherein one of the joining portions on the two opposite sides of the wide-width portion sheets has a predetermined width. It is characterized by being formed in a strip shape with a margin, and a fixing plate for attachment and fixing made of a harder material than the main body sheet is attached to the strip-shaped joint portion.

In this inflation overnight bag, a rigid holding plate is attached to the joint between the wide sheets, so that the inflation overnight bag can be easily attached to the vehicle using that portion.

The mounting structure of an inflation overnight bag for an occupant restraint device according to claim 6 is the mounting structure of an inflation overnight bag for an occupant restraint device according to any one of claims 2 to 5, wherein the wide portion sheet is provided. It is characterized in that only one of the joints on the two opposing sides is fixed to the vehicle and the other is free.

The inflatable bag according to claims 2 to 5 is inflated and deployed by introducing high-pressure gas. Occasionally, the wide sheet on both sides swells into a substantially cylindrical curved shape. In such a case, if the joints at both ends are fixed to the vehicle, the inflation overnight bag itself will not easily expand, and unnecessary force will be applied to the fixing part. Therefore, in the mounting structure according to the invention of claim 6, only one joint is fixed to the vehicle and the other joint is free. In this way, the inflation overnight bag does not hinder the inflation and deployment of the bag itself, and no unnecessary force acts on the fixed portion, so that the inflation force can be effectively applied to the occupant, and the impact energy can be reduced. Can be efficiently absorbed. The occupant waist restraint device according to the invention of claim 7 is characterized in that the inflation evening bag for an occupant restraint device according to any one of claims 2 to 5 is provided such that a joint between two opposing sides of the wide-width portion sheets is directed in the front-rear direction. Interior of the vehicle at the front lower part of the vehicle seat cushion, and of the joints on the opposite two sides of the wide sheet, only the joint located on the rear side of the vehicle is fixed to the vehicle and joined to the vehicle front side The front seat surface of the seat cushion is raised by inflating the inflation overnight bag by filling with high-pressure gas during rapid deceleration of the vehicle, thereby moving the occupant seated in the seat forward. It is characterized by preventing .

With this device, the joint at the rear end of the inflation overnight bag is fixed, and the joint at the front end is free, so when inflating and deploying by introducing high-pressure gas, the front end is inflated so that it rises. . Therefore, the front seat surface of the seat cushion can be raised from the front end side, and the occupant's waist can be effectively restrained by the inflatable bag. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a perspective view showing the appearance of an inflatable evening bag according to an embodiment of the present invention when inflated and deployed.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a cross-sectional view showing the structure of the main body sheet (resin sheet) according to the present invention. FIG. 4 is a schematic side view of an occupant lumbar restraint device using the inflatable bag according to the embodiment of the present invention.

Fig. 5 is a block diagram of a conventional occupant's waist restraint system. FIG. 4B is a side sectional view showing a state before the expansion and deployment, and FIG. 4B shows a state after the inflation evening bag has been expanded and deployed.

Fig. 6 is a configuration diagram of a conventional occupant leg restraint system. (A) is a state before the inflation evening bag is inflated and deployed, and (b) is a state after the inflation evening bag is inflated and deployed. FIG.

FIGS. 7A and 7B are configuration diagrams of a conventional inflation tag, wherein FIG. 7A is an external perspective view showing a state of contraction, and FIG. 7B is an external perspective view showing a state of expansion and deployment.

FIG. 8 is a configuration diagram of another conventional inflator bag. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing an appearance of the inflator bag of the embodiment when inflated and deployed, and FIG. 2 is a sectional view taken along the line AA of FIG. FIG. 3 is a cross-sectional view showing the structure of the main body sheet (resin sheet) according to the present invention.

The bag body 50A of the inflator bag 50 is capable of being inflated and expanded by filling with high-pressure gas, and is for an occupant restraining device that restrains an occupant by inflating and deploying. As shown in FIG. 3, the metal sheet 100 is stretched on the inner surface, and the main body sheet formed by laminating the reinforcing cloths 102, 104, and 106 in a layer form is bonded to each other to provide a flexible structure. It is formed as a hermetic bag having water resistance. In this case, as the metal sheet 100, a flexible thin film sheet such as an aluminum sheet can be used.

As the material of the metal sheet 100, aluminum alloy, copper, copper alloy, stainless steel, etc. can be used in addition to aluminum. In addition, these materials may be used locally or partially only in a portion of the inner surface of the inflatable bag where the temperature is particularly high. When aluminum is used, the thickness of the metal sheet 100 can be 1/100 mm or more: LZ 100 mm. Preferably, it should be 110 mm or more: L / 100 mm.

As the layer 102 in contact with the metal sheet 100 and the outermost layer 106 in the reinforcing cloth layer, for example, a polyester sheet can be used. Two poly A paper layer 104 for reinforcement can be interposed between the ester sheets 102 and 106. In addition, a sewing cloth can be used as the layer 104. In addition, examples of the resin constituting the layers 102 and 104 include not only polyester but also various resins such as polyethylene, polypropylene, and polyamide.

The number and materials of the layers constituting the main body sheet shown in FIG. 3 are not limited to those of the embodiment, and can be appropriately changed according to the required pressure resistance and the like.

The bag body 50 Α molded as a bag has two wide-sided sheets 51, which are rectangular in a plan view and are joined to each other at two opposite sides on one side, and the other opposed side 2 of the wide-sided sheet 51. It is composed of two left and right gore seats 52 for securing the inflation height, which are joined to the edges of the two wide side sheets 51 on the sides. The joint 53 between the wide sheets 51 is formed in a strip shape with a predetermined width of a joint allowance (for example, 15 to 30 mm), and one of the joints 53 has A band-shaped holding plate 65 for attachment and fixing made of a material (for example, a metal plate having a predetermined thickness) harder than the body sheet (resin sheet) constituting the bag body 50A is attached. A mounting hole 66 for screw fixing is formed in the joint 53 through the holding plate 65. By securing a large joint allowance, high joint strength can be obtained even when the main body sheet is thin.

The gore sheet 52 is arranged so as to close the end face of the cylindrical space formed by joining the two wide sheets 51 on the front and back, and the side edges of both wide sheets 51 are provided. And is joined. The joining portion 54 is also formed in a strip shape with a joining margin of a predetermined width (for example, 15 to 30 mm) secured. The joining of the resin sheets is preferably performed by bonding or heat fusion. By ensuring a large joint allowance, high joint strength can be obtained even when the main body sheet is thin.

Since the two gore portion sheets 52 are formed in a substantially rhombic shape with a wide center width H, the two wide portion sheets 51 on the front and back sides are formed at the center wide portions of the two gore portion sheets 52. It is inflatable into a substantially cylindrical curved surface with the portion 52A at the top.

Further, on the surface of the wide portion sheet 51 on one side of the bag body 50A, another resin sheet (Since the temperature of the resin sheet is not severe, a simple resin sheet having no metal layer is used. Good) By attaching 5 8, wide section sheet 5 1 A plurality of narrow pockets 61 are arranged closely adjacent to each other in parallel with the joining portion 53 on the two opposing sides of the pocket. As shown in FIG. 2, each narrow pocket 61 is adhered to the surface of the wide section sheet 51 on the bag body 5 OA side at a predetermined pitch while the resin sheet 58 to be put on is appropriately loosened. It is formed by fusing. The portion indicated by 59 in the figure is the bonded (or fused) portion.

A strip plate 62 made of a material (for example, a metal plate having a predetermined thickness) harder than the resin sheet constituting the bag body 5OA is inserted into each of the narrow pockets 61 formed as described above. ing. The length of each strip plate 62 is set to be longer at the center in the arrangement direction and shorter at the ends, and the four corners of the bag body 50A having a rectangular shape in plan view are formed by strip plates. 62 Freed from restraint by 2.

The inflation overnight bag 50 having the above structure is a resin formed by laminating a metal thin film sheet on the inner surface and laminating a reinforcing cloth in layers, compared to a bag formed from a sheet of resin alone. Since it is formed of a sheet, it can withstand high pressure and high temperature during gas filling sufficiently, and the reliability of the inflation overnight bag 50 can be improved. Further, since the bag body 5OA is formed as a flexible bag body, it can be compactly installed in a vehicle in a flat crushed shape. Further, since the substantially rhombus-shaped gore portion sheet 52 is provided on the end face to secure the height in the expanded state, the degree of energy absorption can be increased. In addition, the rigid strip plate 62 is disposed on the wide sheet 51 that expands into a substantially cylindrical curved shape when expanded by the introduction of high-pressure gas, so that the expansion force of the wide sheet 51 is evenly applied to the entire occupant. The shock from the occupant can be efficiently absorbed, and the occupant protection performance can be improved. In addition, by using the plurality of strip plates 62, the bulge of the wide sheet 51 can be maintained in a substantially cylindrical curved surface, so that the expansion and deployment performance is not hindered.

In particular, the length of each strip plate 62 is set to be longer at the center in the arrangement direction and shorter at the ends, and the four corners of the rectangular bag body 5 OA are set to the strip plates 6 2. Release from the restraint of the bag body, it is possible to prevent excessive force from being applied to the four corners of the bag body 50 A during inflation. Zhang performance can be enhanced.

When this inflation overnight bag 50 is used, the joint 53 on the side where the holding plate 65 is provided is fixed to the vehicle body with screws, and the other joint 53 is left free. FIG. 4 shows an example in which the occupant waist restraint device 100 is configured by using the inflation overnight bag 50.

In the occupant waist restraint device 100, the inflation overnight bag 50 is moved in such a manner that the joint portions 53 of two opposing sides of the wide portion sheets 51 are oriented in the front-rear direction, and the seat cushion 71 It is decorated in the lower front. Then, only the joint 53 on the rear side of the vehicle to which the holding plate 65 is attached is fixed to the vehicle body side member 70 with a port nut 68, and the joint 53 on the front side of the vehicle is free. It is.

When a vehicle equipped with the occupant's lumbar restraint 100 collides forward and high-pressure gas is generated from an inflation overnight (not shown), the inflation overnight bag 50 is inflated and deployed by the introduction of the high-pressure gas, and the seat cushion is inflated. 7 Raise the front seating surface of 1 to prevent the occupant に sitting on the seat from moving forward. At that time, only the joint 53 on the rear end side of the inflation overnight bag 50 is fixed, and the joint 53 on the front end is free. So that the front end is lifted up. Therefore, the front seating surface of the seat cushion 71 can be easily lifted from the front end side, and the inflation force (arrow B) of the inflation overnight bag 50 can be effectively applied to the occupant M's waist. The impact energy can be efficiently absorbed.

In addition to the waist restraint device, the inflation overnight bag includes a driver airbag device, a passenger seat airbag device, a side collision airbag device, an inflation overnight curtain device, and a knee airbag device. It is also applicable as an evening bag. As described above, the inflator bag according to the first aspect of the present invention is formed by molding a resin sheet formed by laminating a metal thin film sheet on the inner surface and laminating a reinforcing cloth in layers. It can withstand high pressure at high temperatures and high temperatures, and can sufficiently secure the reliability of an inflatable bag. In addition, since it is formed as a flexible bag, it can be mounted on a vehicle in a compact, flat and crushed form. In the inflation overnight bag according to the second aspect of the present invention, since the gore sheet is provided for securing the height during inflation and deployment, a high energy absorption rate can be secured.

In the inflatable bag according to the third aspect of the present invention, since a plurality of strip plates made of a hard material are disposed on the inflated wide surface, the inflation force of the inflation overnight bag can be evenly transmitted to the occupant. Can be efficiently absorbed.

In the inflation overnight bag of the invention of claim 4, since the four corners of the bag body are released from the restraint by the strip plate by adjusting the length of the strip plate, excessive force is required when the four corners of the bag body are inflated. Can be prevented, and the inflation performance of the inflation overnight bag can be improved.

In the inflation overnight bag according to the fifth aspect of the present invention, since the hard holding plate is attached to the joint between the wide-width sheets, the inflation overnight bag can be easily attached to the vehicle by using that portion.

In the structure for mounting the inflator bag according to the invention of claim 6, when mounting the inflator bag to the vehicle, only one joint is fixed to the vehicle and the other joint is free, so that the inflation bag itself is The expansion force can be effectively applied to the occupant without impeding the expansion and deployment, and unnecessary force is not applied to the fixed portion, and the impact energy can be efficiently absorbed.

In the occupant lumbar restraint device according to the seventh aspect of the present invention, the joint at the rear end of the inflatable bag is fixed, and the joint at the front end is free. The side can be lifted and inflated. Therefore, the front seating surface of the seat cushion can be raised from the front end side, and the waist of the occupant can be effectively restrained by the inflation overnight bag.

Claims

The scope of the claims

1. In the inflation overnight bag for the occupant restraint device that restrains the occupant in the vehicle by inflating and deploying by filling with gas,

A body sheet including a metal layer formed on an inner surface in contact with the gas, and a flexible cloth layer having excellent flexibility laminated outside the metal layer;

An inflation bag for an occupant restraint device, wherein the main body sheet is formed into a bag shape.

2. The main body sheet has two wide-sided sheets which are rectangular in a plan view and are joined to each other at two opposite sides on one side, and two wide-sided sheets at the other two opposite sides of the wide section sheet. The left and right gusset sheets are joined to the edge of the gusset to secure the inflated height. 2. The inflator bag for an occupant restraint device according to claim 1, wherein the seat is inflatable into a substantially cylindrical curved surface having a central wide portion of each of the gore portion sheets as an apex.

3. On the surface of at least one of the wide sheet portions, a plurality of narrow pockets are closely arranged in parallel with the joints of two opposing sides of the wide sheet, and each narrow sheet is The inflatable bag for an occupant restraint system according to claim 2, wherein a strip plate made of a material harder than the main body sheet is inserted into each of the pockets.

4. The length of each strip plate is set longer at the center in the arrangement direction and shorter at the ends, and the four corners of the bag are released from the restraint by the strip plates. An inflation bag for an occupant restraint system according to claim 3, characterized in that:

5. One of the joints on the two opposing sides of the wide sheet is formed in a band-like shape having a predetermined width of a joint allowance, and the band-like joint is harder than the main body sheet. The inflatable bag for an occupant restraint device according to any one of claims 2 to 4, further comprising a holding plate made of a porous material for fixing.

6. The mounting structure for an inflator bag for an occupant restraint device according to any one of claims 2 to 5, wherein only one of the joints of the two wide sides facing each other on the opposing two sides is attached to the vehicle. A mounting structure for an inflation overnight bag for an occupant restraint device, which is fixed and the other is free.

7. The inflator bag for an occupant restraint device according to any one of claims 2 to 5, wherein the inflator bag is attached to a front lower portion of a seat cushion of a vehicle with a joint portion of two opposing sides of the wide-width portion seats facing in a front-rear direction. Only the joint located on the rear side of the vehicle is fixed to the vehicle out of the joints on the two sides facing each other, and the joint on the front side of the vehicle is free. By inflating and deploying the inflation overnight bag by filling gas, the front seat surface of the seat cushion is raised, thereby preventing the occupant sitting on the seat from moving forward. apparatus.