WO2024014424A1 - 車両用サイドエアバッグ装置 - Google Patents
車両用サイドエアバッグ装置 Download PDFInfo
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- WO2024014424A1 WO2024014424A1 PCT/JP2023/025412 JP2023025412W WO2024014424A1 WO 2024014424 A1 WO2024014424 A1 WO 2024014424A1 JP 2023025412 W JP2023025412 W JP 2023025412W WO 2024014424 A1 WO2024014424 A1 WO 2024014424A1
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- WIPO (PCT)
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- main
- chamber
- lower chamber
- panel
- check valve
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/2334—Expansion control features
- B60R21/2338—Tethers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/207—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in vehicle seats
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/23138—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/23138—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection
- B60R2021/23146—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection seat mounted
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
- B60R2021/23324—Inner walls crating separate compartments, e.g. communicating with vents
Definitions
- the present invention relates to a vehicle side airbag device that restrains an occupant seated in a vehicle seat.
- Airbag devices are almost standard equipment in recent vehicles. Airbag devices are safety devices that operate in emergencies such as vehicle collisions, and use an airbag cushion that inflates and deploys with gas pressure to catch and protect occupants.
- the airbag cushion is inflated and deployed from the side of the seat into the gap between the occupant and the side of the vehicle, making it possible to restrain the occupant from the side. It has become.
- the side airbag 4 of Patent Document 1 has a partition member 7 inside so that the thickness can be changed depending on the part, so that the skeletally strong chest and lumbar region and the weak abdomen can be restrained appropriately. It has become.
- a typical configuration of a vehicle side airbag device is a vehicle side airbag device including an airbag module attached to a side frame of a seat back of a vehicle seat.
- the airbag module includes an airbag cushion that is rolled or folded into a predetermined storage configuration and is attached to a side frame, and an inflator that is inserted into the airbag cushion and attached to the side frame.
- the airbag cushion has a pre-push chamber that first receives gas from the inflator to inflate and deploy, and a main chamber that receives gas via the pre-push chamber to inflate and deploy.
- the main chamber includes a pre-upper chamber that extends in the vertical direction along the seat cushion of the vehicle seat, and a pre-lower chamber that extends forward from the bottom of the pre-upper chamber along the seat cushion of the vehicle seat.
- a main upper chamber provided in a range overlapping with the pre-upper chamber when viewed, a main lower chamber provided in a range below the main upper chamber and overlapping with the pre-lower chamber, and a partition between the main upper chamber and the main lower chamber.
- a baffle or stitching that prevents gas from passing through;
- the airbag cushion further includes a first inner vent that supplies gas from the pre-upper chamber to the main upper chamber; and a first inner vent that supplies gas from the pre-lower chamber to the main lower chamber. and a check valve that prevents gas from passing from the main lower chamber to the pre-lower chamber.
- the pre-push chamber described above is a part where inflation and deployment starts earlier than the main chamber.
- the pre-push chamber quickly inflates and deploys to push the occupant back toward the center of the seat, and then the main chamber expands and expands widely, making it possible to efficiently restrain the occupant.
- the pre-lower chamber expands along the seat cushion, and the main lower chamber expands and deploys by receiving gas from the pre-lower chamber.
- This main lower chamber can restrain the waist of an occupant seated on the seat cushion.
- a check valve prevents gas from flowing back into the pre-lower chamber, so that the internal pressure can be kept high and the heavy waist can be fully restrained. Therefore, according to the above configuration, with a simple configuration using a baffle and a check valve, it is possible to suppress the amount of movement of the occupant from the seat and improve the occupant restraint performance of the airbag cushion.
- the above-mentioned check valve includes a second inner vent that penetrates a predetermined part of a panel member that partitions the pre-lower chamber and the main lower chamber, and a patch that is attached to the panel member so as to cover the second inner vent inside the main lower chamber. and a pair of joints provided at two opposite locations around the second inner vent to join the panel member and the patch, and the patch is spaced apart from the panel member in a range other than the pair of joints. It may be possible.
- the above-mentioned check valve includes a second inner vent that penetrates a predetermined part of a panel member that partitions the pre-lower chamber and the main lower chamber, and a pair of inner vents that are attached to the panel member so as to cover the second inner vent within the main lower chamber. and a joint portion for joining the panel member and the pair of patches, each of the pair of patches is attached to the panel member in a semicircular shape with right sides overlapping each other above the second inner vent. Good too.
- the above-mentioned check valve includes a second inner vent that penetrates a predetermined part of a panel member that partitions the pre-lower chamber and the main lower chamber, a cross-shaped bridge that is attached to the panel member over the second inner vent, and a main and a patch with a predetermined cut attached to the panel member to cover the second inner vent within the lower chamber.
- the above-mentioned check valve includes a second inner vent that penetrates a predetermined portion of a panel member that partitions the pre-lower chamber and the main lower chamber, and a pair of inner vents that are attached to the panel member so as to cover the second inner vent within the main lower chamber.
- the pair of patch members each have a cross-shaped cut, and the pair of patch members may be attached to the panel member in a state in which the centers of the cross-shaped cuts are aligned and overlapped, but the parts other than the centers are rotated so that they do not overlap. good.
- the above airbag cushion further has a main panel forming a pre-push chamber side of the main chamber, and the main panel includes an upper panel forming the main upper chamber to the upper part of the main lower chamber, and a lower part of the main lower chamber.
- the check valve has a sewn portion in which the lower edge of the upper panel and the upper edge of the upper panel are folded back toward the main lower chamber side and are sewn in a vertically stacked state.
- a non-sewn part formed in a part of the overlapping range and not sewn may be included.
- the lower panel may have one or more pleats formed in folds within the non-sewn portion.
- the main upper chamber and the main lower chamber are separated by a baffle, and the baffle has a cutout in the area that overlaps with the inflator near the rear end portion when viewed from the width direction of the vehicle seat. It may have a part.
- the baffle partitions the main upper chamber and the main lower chamber, and the baffle is provided with a notch to reduce the thickness of the rear part of the airbag cushion, so that the airbag cushion is in contact with the seat frame. This allows for smooth expansion and deployment.
- the main upper chamber and the main lower chamber are separated by a baffle, and the baffle is a notch cut out in a predetermined range near the rear end portion when viewed from the width direction of the vehicle seat.
- the rear end portion of the baffle including the notch portion may be sewn along a sewn portion forming the rear edge of the main chamber while being bent upwardly of the airbag cushion.
- the thickness of the rear portion of the airbag cushion can be suppressed. It becomes possible to smoothly inflate and deploy the airbag cushion while it is in contact with the seat frame.
- FIG. 1 is a diagram illustrating a vehicle side airbag device according to an embodiment of the present invention. It is a figure which independently illustrated the airbag cushion of FIG.1(b). There are various cross-sectional views of the airbag cushion in FIG. 2(b). It is a figure which illustrated the check valve of FIG.3(b). It is a figure which illustrated the result of the performance test of the airbag cushion of this embodiment. It is a figure which illustrated the 1st modification of the check valve of FIG. It is a figure which illustrated the 2nd modification of the check valve of FIG. It is a figure which illustrated the 3rd modification of the check valve of FIG. It is a figure which illustrated the 4th modification of the check valve of FIG.
- FIG.9 It is a figure which illustrated the lower side panel of FIG.9(b). It is a figure which illustrated the process of forming the check valve of Fig.9 (a). It is a figure which illustrated the situation when the non-return valve of FIG.11(c) moves. 10 is a diagram illustrating a modification of the baffle in FIG. 9. FIG.
- FIG. 1 is a diagram illustrating a vehicle side airbag device (hereinafter referred to as side airbag device 100) according to an embodiment of the present invention.
- FIG. 1A shows an example of the airbag cushion 112 before it is moved.
- the side airbag device 100 can be installed in the front row, rear row, or any seat on either the left or right side of the vehicle.
- the direction in which the occupant is facing is the forward direction
- the opposite direction of the back is backward
- the right hand side of the occupant is the right direction.
- the left direction is the passenger's left hand side.
- the direction of the occupant's head is upward
- the direction of the occupant's feet is downward.
- the outer skin and seat pad (for example, urethane material) of the seat back 104 of the seat 102 are omitted, and only the seat frame 106 is illustrated.
- the seat frame 106 is a member built into the seat back 104 and serves as a skeleton.
- the airbag module 110 is attached to the side frame 108 of the seat frame 106.
- the side frames 108 are parts of the seat frame 106 that extend along the left and right sides of the seat back 104.
- the airbag module 110 is attached to the side frame 108 on the left side of the seat back 104 in the width direction.
- the airbag module 110 can also be attached to the right side frame of the seat back 104 in the width direction. That is, the airbag module 110 can be installed either on the side of the seat 102 on the door side near the collision location (near side) or on the side of the seat 102 on the inside of the vehicle far from the collision location (far side). .
- the airbag module 110 includes an airbag cushion 112 and an inflator 114.
- the airbag cushion 112 is a bag-like member that can be inflated with gas, and is wound or folded into a predetermined storage configuration and attached to the side frame.
- the airbag cushion is inflated and deployed in an emergency such as when a shock occurs to the vehicle, and restrains the occupant seated on the seat 102.
- the inflator 114 is a gas generator that is electrically connected to the vehicle, moves when it receives a signal from the vehicle due to the detection of an impact, and supplies gas to the airbag cushion 112.
- a cylindrical type inflator is used as the inflator 114.
- the inflator 114 is inserted into the airbag cushion 112 in a vertically longitudinal direction along the side frame 108, and is attached to the side frame 108 using stud bolts (not shown).
- inflators include types that are filled with a gas generating agent and combust to generate gas, types that are filled with compressed gas and supply gas without generating heat, and types that are filled with compressed gas and supply gas without generating heat, or There are hybrid types that use both gas and compressed gas. Any type of inflator 114 can be used.
- FIG. 1(b) is a diagram illustrating the state of the airbag cushion 112 of FIG. 1(a) after being inflated and deployed.
- the side airbag device 100 moves the airbag module 110 when a collision is detected through various sensors and a predetermined electronic control unit (ECU).
- ECU electronice control unit
- the inflator 114 blows out gas due to a movable signal sent from the above-mentioned ECU or the like.
- the airbag cushion 112 uses gas from the inflator 114 to push away the skin of the seat bag 104 and inflate into the indoor space.
- FIG. 2 is a diagram independently illustrating the airbag cushion 112 of FIG. 1(b).
- FIG. 2(a) is a diagram illustrating the airbag cushion 112 of FIG. 1(b) viewed from the outside in the width direction of the seat.
- the airbag cushion 112 of this embodiment includes a main chamber 116 as a main part that restrains the occupant.
- the main chamber 116 is a portion that expands and expands widely toward the front from the side frame 108 (see FIG. 1(b)).
- the inside of the main chamber 116 is divided by a baffle 146, which will be described later, into an upper main upper chamber 118 that mainly restrains the shoulders and chest of the occupant, and a lower main lower chamber 120 that mainly restrains the occupant's waist. ing.
- the airbag cushion 112 includes a pre-push chamber 122 as a part that is inflated and deployed before the main chamber 116. As illustrated in FIG. 1(b), the pre-push chamber 122 protrudes from the rear side of the main chamber 116 toward the center side of the seat back 104 in the width direction and expands and expands.
- the pre-push chamber 122 first receives gas from the inflator 114 and quickly inflates and deploys, pushing the occupant back toward the center of the seat 102.
- the main chamber 116 expands and expands upon receiving the gas that has passed through the pre-push chamber 122, thereby broadly restraining the occupant's body.
- FIG. 2(b) is a diagram illustrating the configuration of a panel member of the airbag cushion 112 in FIG. 2(b).
- the airbag cushion 112 is a bag-like member, and is formed by sewing or gluing together multiple base fabrics that make up its surface, or by spinning or weaving using OPW (One-Piece Woven). There is.
- An inflator insertion portion 124 is provided in the rear portion of the airbag cushion 112 when it is expanded.
- the inflator insertion part 124 is a part into which the inflator 114 (see FIG. 2(a)) is inserted and installed, and is provided inside the pre-push chamber 122 at a position located behind the main chamber 116.
- the inflator insertion portion 124 is provided with bolt holes 126 and 128 through which two stud bolts of the inflator 114 (see FIG. 2(a)) pass.
- the stud bolts are exposed to the outside through the bolt holes 126 and 128, and are fastened and fixed to the side frame 108 (see FIG. 1(b)). Accordingly, the airbag cushion 112 is also attached to the side frame 108.
- the inflator insertion portion 124 is assumed to have a structure in which stud bolts are fastened to the side frame 108 from the center side of the seat 102, but it is also assumed that the inflator insertion portion 124 is structured to fasten stud bolts to the side frame 108 from the outside. is also possible.
- a frame grounding portion 130 is formed at the rear of the main chamber 116.
- the frame ground portion 130 is a portion outside the pre-push chamber 122 in the width direction.
- the frame grounding portion 130 is provided in a shape along the side frame 108 (see FIG. 1(b)) so that the pre-push chamber 122 receives a reaction force from the side frame 108.
- FIG. 3 is a cross-sectional view of the airbag cushion 112 shown in FIG. 2(b).
- FIG. 3(a) is a sectional view taken along line AA of the airbag cushion 112 shown in FIG. 2(b).
- the main chamber 116 is configured to include, as panel members, a main panel 134 on the outer side in the width direction of the seat 102 (see FIG. 1(a)), and a main panel 136 on the center side in the width direction of the seat 102. .
- the pre-push chamber 122 is formed by providing a panel member 138 on the main panel 136 of the main chamber 116.
- the pre-push chamber 122 is provided with the inflator insertion portion 124.
- the inflator insertion portion 124 includes an inner tube 132 that rectifies gas in the vertical direction.
- the inflator insertion portion 124 is attached to the side frame 108 (see FIG. 1(b)) from the center side in the width direction of the seat back 104, with stud bolts of the inflator 114 exposed to the outside through bolt holes 126 and the like.
- the pre-push chamber 122 is quickly supplied with gas from the inflator 114 (see FIG. 2(a)), and quickly completes inflation and deployment before the main chamber 116.
- the pre-push chamber 122 pushes aside the seat pad and the like inside the seat 102 (see FIG. 1(a)) to secure a space for the main chamber to inflate and deploy, while pushing the occupant back toward the center of the seat 102.
- the pre-push chamber 122 has an L-shape provided from the rear to the bottom of the airbag cushion 112.
- the pre-upper chamber 122a extends in the vertical direction along the seat back 104.
- the pre-lower chamber 122b extends forward along the seat cushion 105 of the seat 102 from the lower portion of the pre-upper chamber 122a.
- the main upper chamber 118 is provided in a range that overlaps with the pre-upper chamber 122a when the seat 102 is viewed from the side.
- the main upper chamber 118 is connected to the pre-upper chamber 122a by first inner vents 140a, 140b.
- the main upper chamber 118 is supplied with gas from the inflator 114 (see FIG. 2(a)) from the pre-upper chamber 122a through the first inner vent 140b.
- Vent holes 142a and 142b are provided on the front side of the main upper chamber 118, and the gas that has expanded and expanded the main upper chamber 118 is discharged to the outside from the vent holes 142a and 142b.
- FIG. 3(b) is a BB sectional view of the airbag cushion 112 in FIG. 2(b).
- the main lower chamber 120 is provided below the main upper chamber 118 in a range that overlaps with the pre-lower chamber 122b.
- the main lower chamber 120 receives gas from the pre-lower chamber 122b through the check valve 144, and mainly restrains the occupant's waist.
- a baffle 146 is provided inside the main chamber 116.
- the baffle 146 is a panel member made of the same base fabric as the main panel 134, and is joined to the main panels 134, 136 by sewing.
- the main chamber 116 is divided into a main upper chamber 118 and a main lower chamber 120 by the baffle 146, and gas cannot pass between the main upper chamber 118 and the main lower chamber 120.
- the baffle 146 can also be sewn to the main panel 136 together with the panel member 138.
- the baffle 146 is arranged so that the crease is located on the upper side in FIG. 3(b), it is also possible to arrange it so that the crease is located on the lower side.
- the interior of the main chamber 116 can be divided into a main upper chamber 118 and a main lower chamber 120 by joining the main panels 134 and 136 in the same area as the joint area of the baffle 146. is possible.
- FIG. 4 is a diagram illustrating the check valve 144 of FIG. 3(b).
- FIG. 4A is a diagram illustrating an outline of the check valve 144.
- the check valve 144 can prevent gas from passing from the main lower chamber 120 to the pre-lower chamber 122b while supplying gas from the pre-lower chamber 122b (see FIG. 3(b)) to the main lower chamber 120. It has become.
- the check valve 144 is realized by a second inner vent 148 provided on the main panel 136, a patch 150 covering the second inner vent 148, and a pair of joints 152a and 152b.
- the second inner vent 148 is a place through which gas passes, and is provided as a through hole that penetrates the main panel 136 that partitions the pre-lower chamber 122b (see FIG. 3(b)) and the main lower chamber 120.
- the patch 150 is attached to the main panel 136 on the main lower chamber 120 side of the main panel 136 (see FIG. 3(b)) so as to cover the second inner vent 148.
- the pair of joint parts 152a and 152b are parts that join the main panel 136 and the patch 150, and are provided at two locations facing each other with the second inner vent 148 at the center.
- the joints 152a and 152b are formed by sewing along the right and left edges of the patch 150.
- FIG. 4(b) is a diagram illustrating the state when the check valve 144 of FIG. 4(a) is opened.
- the interval between the joints 152a and 152b is shorter than the dimensions of the upper and lower edges of the patch 150, creating a slack in the patch 150. Therefore, the patch 150 is separated from the main panel 136 toward the main lower chamber 120 side when a gas force is applied from the pre-lower chamber 122b side, allowing gas to flow in the vertical direction from the upper edge side and the lower edge side.
- the patch 150 it is also possible to provide the joint portions 152a and 152b in a continuous manner. For example, it is also possible to provide a sewn portion from the upper edge of the patch 150 to the left and right edges, so that only the lower edge of the patch 150 is not sewn. With this configuration, it is possible to realize a check valve configured to allow gas to flow only downward.
- FIG. 4(c) is a diagram illustrating the state when the check valve 144 of FIG. 4(a) is closed.
- FIG. 5 is a diagram illustrating the results of a performance test of the airbag cushion 112 of this embodiment.
- FIG. 5A is a diagram illustrating the results of an internal pressure test of the airbag cushion 112.
- the horizontal axis indicates time (msec), and the vertical axis indicates internal pressure (kPa).
- the embodiment is the airbag cushion 112 described above, which includes a pre-push chamber 122, a main chamber 116 divided by a baffle 146 into a main upper chamber 118 and a main lower chamber 120, and a main lower chamber 120. This is an example including a check valve 144.
- Comparative Example 1 is an example that includes a pre-push chamber 122 (see FIG. 3(b)) and a main chamber without a baffle 146 and whose interior is not partitioned.
- Comparative Example 2 is an example including a pre-push chamber 122 and a main chamber 116 whose interior is divided into an upper part and a lower part by a baffle 146. Comparative Example 1 and Comparative Example 2 both do not have the check valve 144.
- the airbag cushion 112 of this example has the check valve 144 in comparison with Comparative Examples 1 and 2, so that the airbag cushion 112 of the present example has a main lower part that restrains the lumbar region. It has been found that the internal pressure of the chamber 120 can be maintained high.
- FIG. 5(b) is a diagram illustrating the results of a static deployment test of the airbag cushion 112. This test analyzed the speed until the inflation and deployment of each area was completed when the airbag cushion 112 was deployed.
- the comparative example is an example of a conventional airbag cushion for a side airbag that does not include the pre-push chamber 122 (see FIG. 3(b)) or the baffle 146.
- the airbag cushion 112 of this embodiment completes inflation and deployment particularly quickly in the area that restrains the lower back. Therefore, it has been found that the gas flow is adjusted by the pre-push chamber 122 (see FIG. 3(b)) and the baffle 146, and the main lower chamber 120 that restrains the waist can be quickly inflated and deployed.
- the pre-lower chamber 122b expands along the seat cushion 105, receives gas from the pre-lower chamber 122b, and receives gas from the main lower chamber.
- the chamber 120 expands and deploys, and the check valve 144 prevents gas from flowing back from the main lower chamber 120 to the pre-lower chamber 122b. Due to these, the airbag cushion 112 can achieve faster inflation and deployment of the main lower chamber 120 and maintain a high internal pressure, making it possible to fully restrain the heavy waist region. Therefore, according to the present embodiment, with a simple configuration using the baffle 146 and the check valve 144, it is possible to suppress the amount of movement of the occupant from the seat 102 and improve the occupant restraint performance of the airbag cushion 112. be.
- FIG. 6 is a diagram illustrating a first modification (check valve 200) of the check valve 144 in FIG. 4. As shown in FIG. In the following description, the same reference numerals are given to the constituent elements that have already been explained, and the explanation thereof will be omitted. In addition, components having the same names as those already described have the same configuration and function even if they are given different symbols.
- FIG. 6(a) is a diagram illustrating an outline of the check valve 200.
- the check valve 200 is realized by a second inner vent 148 and a pair of patches 202a, 202b attached to the main panel 136 to cover the second inner vent 148 within the main lower chamber 120 (see FIG. 3(b)). There is.
- the patches 202a and 202b each have a semicircular shape, and the right sides 204 and 206 overlap each other above the second inner vent 148 on the main lower chamber 120 side of the main panel 136 (see FIG. 3(b)). It is attached to the main panel 136 as shown in FIG.
- the joining portion 208 is provided by sewing along the arc of the semicircular patches 202a, 202b, and joins the patches 202a, 202b to the main panel 136.
- FIG. 6(b) is a diagram illustrating the state when the check valve 200 of FIG. 6(a) is opened. Patches 202a, 202b are attached to main panel 136 with some slack. When a gas force is applied from the pre-lower chamber 122b side (see FIG. 3(b)), the right sides 204 and 206 of the patches 202a and 202b are separated from the main panel 136 toward the main lower chamber 120 side, An opening is formed between sides 204, 206 to allow gas to pass through.
- FIG. 6(c) is a diagram illustrating the state when the check valve 200 of FIG. 6(a) is closed.
- the patches 202a and 202b are pressed against the main panel 136 by the force of the gas in the main lower chamber 120, and the second inner vent 148 is closed. I can escape. Therefore, in the check valve 200 as well, it is possible to suppress the backflow of gas from inside the main lower chamber 120 and maintain the internal pressure of the main lower chamber 120.
- FIG. 7 is a diagram illustrating a second modification (check valve 220) of the check valve 144 in FIG. 4.
- FIG. 7A is a diagram illustrating an outline of the check valve 220.
- the check valve 220 includes a second inner vent 148, a cross-shaped bridge 222 attached to the main panel 136 over the second inner vent 148, and a second inner vent inside the main lower chamber 120 (see FIG. 3(b)). This is accomplished by a patch 224 attached to main panel 136 over 148.
- the bridge 222 is a member that prevents the patch 224 from moving toward the pre-lower chamber 122b (see FIG. 3(b)), and is overlapped with the second inner vent 148, and each end of the cross shape is sewn to the main panel 136. It can be installed by doing this.
- the patch 224 is circular and has a cross cutout 226.
- the patch 224 is attached to the main panel 136 on the main lower chamber 120 side (see FIG. 3(b)) so as to cover the second inner vent 148.
- Joint portion 228 is provided along the outer circumference of patch 224 and joins patch 224 to main panel 136 .
- FIG. 7(b) is a diagram illustrating the state when the check valve 220 of FIG. 7(a) is opened.
- the cross-shaped cut 226 opens to form an opening to allow gas to pass through.
- FIG. 7(c) is a diagram illustrating the state when the check valve 220 of FIG. 7(a) is closed.
- the check valve 220 can also suppress the backflow of gas from the inside of the main lower chamber 120 (see FIG. 3(b)) and maintain the internal pressure of the main lower chamber 120.
- FIG. 8 is a diagram illustrating a third modification (check valve 240) of the check valve 144 in FIG. 4.
- FIG. 8(a) is a diagram illustrating an outline of a check valve.
- the check valve 240 is implemented by a second inner vent 148 and a pair of patches 242, 244 attached to the main panel 136 to cover the second inner vent 148 within the main lower chamber 120 (see FIG. 3(b)). There is.
- Each patch 242, 244 has a circular cross-shaped cutout 246, 248, respectively.
- the patches 242 and 244 are attached to the main panel 136 with the centers of the cross notches 246 and 248 aligned and overlapped, but rotated so that they do not overlap except for the centers.
- FIG. 8(b) is a diagram illustrating the state when the check valve 240 of FIG. 8(a) is opened.
- the patches 242 and 244 have cross-shaped notches 246 and 248 when a large force of gas is applied from the pre-lower chamber 122b side (see FIG. 3(b)) due to the movement of the inflator 114 (see FIG. 2(a)). Open to form an opening and allow gas to pass through.
- FIG. 8(c) is a diagram illustrating the state when the check valve 240 of FIG. 8(a) is closed.
- the patches 242 and 244 are difficult to open with a force when restraining the occupant, which is smaller than a force when the inflator 114 (see FIG. 2A) moves, and are kept in a state where the second inner vent 148 is closed. Therefore, in the check valve 240 as well, it is possible to suppress the backflow of gas from inside the main lower chamber 120 (see FIG. 3(b)) and maintain the internal pressure of the main lower chamber 120.
- FIG. 9 is a diagram illustrating a fourth modification (check valve 260) of the check valve 144 in FIG. 4.
- FIG. 9(a) is a diagram illustrating a check valve 260 corresponding to FIG. 2(b).
- a main panel 264 forming the pre-push chamber 122 side of the main chamber 116 is constituted by an upper panel 266 and a lower panel 268. A portion between the upper panel 266 and the lower panel 268 is openable, and this portion functions as the check valve 260.
- FIG. 9(b) is an exploded view of each panel member of the airbag cushion 262 of FIG. 9(a).
- the main chamber 116 is formed by an outer main panel 134 in the width direction of the seat 102 (see FIG. 1(b)) and an inner main panel 264, with a baffle in between. 146 are arranged.
- the panel member 138 of the pre-push chamber 122 is attached further inside the main panel 264, and the inner tube 132 is arranged inside.
- the upper panel 266 forms the area from the main upper chamber 118 (see FIG. 9(a)) to the upper part of the main lower chamber 120.
- Lower panel 268 forms the lower portion of main lower chamber 120 .
- FIG. 10 is a diagram illustrating the lower panel 268 in FIG. 9(b).
- FIG. 10(a) is a diagram of the lower panel 268 of FIG. 9(a) unfolded on a plane.
- the lower panel 268 has a structure in which sewn portions 270a to 270c are joined to the lower panel 268 (see FIG. 9(b)), and non-sewn portions 272a and 272b form an opening through which gas passes.
- Pleats 274 and 276 are formed on the lower panel 268 in order to widen the non-sewn portions 272a and 272b.
- the pleats 274, 276 are provided by forming folds within the non-stitched portions 272a, 272b. For example, a valley fold L1 and mountain folds L2 and L3 are formed in the non-sewn portion 272a. Similarly, a valley fold L4 and mountain folds L5 and L6 are also formed in the non-sewn portion 272b.
- FIG. 10(b) is a diagram of the lower panel 268 in FIG. 10(a) with pleats 274 and 276 provided thereon. By providing pleats 274, 276, the dimensions of lower panel 268 are reduced.
- FIG. 10(c) is a cross-sectional view taken along line CC in FIG. 10(b). As illustrated in FIG. 10(c), by providing the pleats 274, the range of the non-sewn portion 272a is in a folded state.
- FIG. 11 is a diagram illustrating the process of forming the check valve 260 of FIG. 9(a).
- FIG. 11(a) is a diagram illustrating how the lower panel 268 of FIG. 10(b) is joined to the upper panel 266 of FIG. 9(b). The lower panel 268 is once turned upside down, and then the upper edge 278 is overlapped and bonded to the lower edge 276 of the upper panel 266 (see FIG. 9(b)).
- FIG. 11(b) is a diagram in which the lower panel 268 of FIG. 11(a) is turned downward again.
- Main panel 264 is formed by inverting lower panel 268 joined to upper panel 266.
- FIG. 11(c) is a DD cross-sectional view of the main panel 264 in FIG. 11(b).
- the check valve 260 is in a state in which the lower edge 276 of the upper panel 266 and the upper edge 278 of the upper panel 266 are folded back toward the main lower chamber 120 side (see FIG. 3(b)) and stacked one above the other.
- FIG. 11(d) is a view of the check valve 260 of FIG. 11(c) viewed from the outside in the width direction of the seat (right side in FIG. 11(c)), and is in the same direction as FIG. 9(a).
- a check valve 260 is illustrated in FIG.
- the check valve 260 forms sewn parts 270a to 270c in which the lower edge 276 of the upper panel 266 and the upper edge 278 of the lower panel 268 are overlapped and sewn, and some areas are not sewn. This is provided by forming non-sewn portions 272a and 272b.
- FIG. 11(e) is a sectional view taken along line EE of the check valve 260 in FIG. 11(d). As described above, pleats 274 formed by forming folds are formed within the range of the non-sewn portion 272a.
- FIG. 12 is a diagram illustrating how the check valve 260 of FIG. 11(c) moves.
- FIG. 12(a) is a diagram illustrating the state when the check valve 260 of FIG. 11(c) is opened.
- FIG. 12(b) is a diagram illustrating the state when the check valve 260 of FIG. 12(a) is closed.
- the check valve 260 When external pressure is applied to the main lower chamber 120 when the occupant is restrained, the check valve 260 is pressed against the main panel 264 by the force of the gas in the main lower chamber 120, and the non-sewn portion 272a does not open. Therefore, the check valve 260 can also suppress the backflow of gas from inside the main lower chamber 120 and maintain the internal pressure of the main lower chamber 120.
- FIG. 13 is a diagram illustrating a modification (baffle 280) of the baffle 146 illustrated in FIG. 9.
- FIG. 13(a) is a diagram illustrating the baffle 280 according to FIG. 9(a).
- the baffle 280 is installed such that a rear end portion 282 is bent upward along a sewn portion 284 that borders the front side of the frame grounding portion 130 of the main chamber 116.
- the baffle 146 in FIG. 9(b) is provided with a notch 147.
- the notch 147 cuts out a region of the baffle 146 that overlaps with the inflator 114 (see FIG. 2(a)) near the rear end portion 149 when viewed from the width direction of the seat (see FIG. 1(b)). It is formed by By providing the notch 147 in the baffle 146, the thickness of the rear part of the airbag cushion 112 can be suppressed, and the airbag cushion 112 can be smoothly inflated and deployed while it is in contact with the seat frame 106.
- FIG. 13(b) is a diagram illustrating the baffle 280 according to FIG. 9(b).
- the rear end portion 282 of the baffle 280 has a notch 286 formed in the center and bifurcated side edges 288a and 288b.
- the rear end portion 282 of the baffle 280 including the notch 286 is bent upwardly from the airbag cushion 262 and extends along the sewn portion 284 that forms the rear edge of the main chamber 116 (see FIG. 13(a)). Sewn.
- the side edge portions 288a and 288b have an elongated shape and do not spread out after being overlapped and sewn along the sewing portion 284, so that the thickness of the airbag cushion 262 when it is inflated and deployed can be suppressed.
- the baffle 280 suppresses the thickness of the rear side of the airbag cushion 262, and the frame grounding portion 130 (see FIG. 13(a) ) can be suitably formed. Therefore, the airbag cushion 262 including the baffle 280 can be smoothly inflated and deployed while in contact with the seat frame 106 (see FIG. 1(b)).
- the present invention can be used in a vehicle side airbag device installed in a vehicle.
- Non-sewn portion 274... Pleats, 276... Lower edge, 278... Upper edge, 280... Baffle, 282...Rear end portion, 284...Sewn portion, 286...Notch portion, 288a, 288b...Side edge portion
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Abstract
Description
図6は、図4の逆止弁144の第1変形例(逆止弁200)を例示した図である。以降の記載において、既に説明した構成要素については、同じ符号を付することによって、その説明を省略する。また、既に説明した構成要素と同じ名称の構成要素は、異なる符号が付されていても、同じ構成および機能を有するものとする。
Claims (9)
- 車両用シートのシートバックのサイドフレームに取り付けられるエアバッグモジュールを備える車両用サイドエアバッグ装置であって、
前記エアバッグモジュールは、
巻回または折り畳まれた所定の収納形態となって前記サイドフレームに取り付けられるエアバッグクッションと、
前記エアバッグクッションに挿入された状態で前記サイドフレームに取り付けられるインフレータと、
を有し、
前記エアバッグクッションは、
前記インフレータから最初にガスを受けて膨張展開するプリプッシュチャンバと、
前記プリプッシュチャンバを経由したガスを受けて膨張展開するメインチャンバと、
を有し、
前記プリプッシュチャンバは、
前記シートバックに沿って上下方向に延びるプリ上部チャンバと、
前記プリ上部チャンバの下部から前記車両用シートのシートクッションに沿って前方に延びるプリ下部チャンバと、
を有し、
前記メインチャンバは、
前記車両用シートの側方から見て前記プリ上部チャンバに重なる範囲に設けられるメイン上部チャンバと、
前記メイン上部チャンバの下方にて前記プリ下部チャンバに重なる範囲に設けられるメイン下部チャンバと、
前記メイン上部チャンバとメイン下部チャンバとの間を区画しガスを通過不能にするバッフルまたは縫製部と、
を有し、
前記エアバッグクッションはさらに、
前記プリ上部チャンバから前記メイン上部チャンバにガスを供給する第1インナベントと、
前記プリ下部チャンバから前記メイン下部チャンバにガスを供給しつつ該メイン下部チャンバから該プリ下部チャンバへのガスの通過を防ぐ逆止弁と、
を有することを特徴とする車両用サイドエアバッグ装置。 - 前記逆止弁は、
前記プリ下部チャンバと前記メイン下部チャンバとを区画するパネル部材の所定箇所を貫通させた第2インナベントと、
前記メイン下部チャンバ内にて前記第2インナベントを覆うよう前記パネル部材に取り付けられるパッチと、
前記第2インナベントを中心にして向かい合う二か所に設けられて前記パネル部材と前記パッチとを接合する一対の接合部と、
を有し、
前記パッチは、前記一対の接合部以外の範囲で前記パネル部材から離間可能になっていることを特徴とする請求項1に記載の車両用サイドエアバッグ装置。 - 前記逆止弁は、
前記プリ下部チャンバと前記メイン下部チャンバとを区画するパネル部材の所定箇所を貫通させた第2インナベントと、
前記メイン下部チャンバ内にて前記第2インナベントを覆うよう前記パネル部材に取り付けられる一対のパッチと、
前記パネル部材と前記一対のパッチとを接合する接合部と、
を有し、
前記一対のパッチはそれぞれ、半円状で直辺が前記第2インナベントの上で互いに重なるよう前記パネル部材に取り付けられることを特徴とする請求項1に記載の車両用サイドエアバッグ装置。 - 前記逆止弁は、
前記プリ下部チャンバと前記メイン下部チャンバとを区画するパネル部材の所定箇所を貫通させた第2インナベントと、
前記第2インナベントに重ねて前記パネル部材に取り付けられる十字型のブリッジと、
前記メイン下部チャンバ内にて前記第2インナベントを覆うよう前記パネル部材に取り付けられる所定の切込みが入ったパッチと、
を有することを特徴とする請求項1に記載の車両用サイドエアバッグ装置。 - 前記逆止弁は、
前記プリ下部チャンバと前記メイン下部チャンバとを区画するパネル部材の所定箇所を貫通させた第2インナベントと、
前記メイン下部チャンバ内にて前記第2インナベントを覆うよう前記パネル部材に取り付けられる一対のパッチと、
を有し、
前記一対のパッチ部材は、それぞれ十字の切込みを有し、該十字の切込みの中心を揃えて重ねつつ該中心以外が重ならないよう回転させた状態で前記パネル部材に取り付けられることを特徴とする請求項1に記載の車両用サイドエアバッグ装置。 - 前記エアバッグクッションはさらに、前記メインチャンバの前記プリプッシュチャンバ側を形成するメインパネルを有し、
前記メインパネルは、
前記メイン上部チャンバから前記メイン下部チャンバの上部までを形成する上側パネルと、
前記メイン下部チャンバの下部を形成する下側パネルと、
を有し、
前記逆止弁は、
前記上側パネルの下縁および前記上側パネルの上縁を前記メイン下部チャンバ側に折り返して上下に重ねた状態で縫製した縫製部と、
前記上下に重ねた範囲の一部に形成される前記縫製が施されていない非縫製部と、
を有することを特徴とする請求項1に記載の車両用サイドエアバッグ装置。 - 前記下側パネルは、前記非縫製部の範囲内に折り目を形成して設けた1または複数のプリーツを有することを特徴とする請求項6に記載の車両用サイドエアバッグ装置。
- 前記メイン上部チャンバとメイン下部チャンバとの間は、前記バッフルによって区画されていて、
前記バッフルは、前記車両用シートの幅方向から見たときの後端部分の近傍に前記インフレータと重なる範囲を切り欠いた切欠部を有することを特徴とする請求項1に記載の車両用サイドエアバッグ装置。 - 前記メイン上部チャンバとメイン下部チャンバとの間は、前記バッフルによって区画されていて、
前記バッフルは、前記車両用シートの幅方向から見たときの後端部分の近傍に所定の範囲を切り欠いた切欠部を有し、
前記バッフルのうち前記切欠部を含む後端部分は、前記エアバッグクッションの上側に屈曲した状態で前記メインチャンバの後縁を形成する縫製部に沿って縫製されることを特徴とする請求項1に記載の車両用サイドエアバッグ装置。
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Citations (9)
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JPS5247233A (en) * | 1975-10-09 | 1977-04-14 | Honda Motor Co Ltd | Air bag |
JPH07329693A (ja) * | 1994-06-10 | 1995-12-19 | Takata Kk | エアバッグの内圧調節装置 |
JPH1071923A (ja) * | 1996-08-30 | 1998-03-17 | Honda Motor Co Ltd | 車両用エアバッグ装置 |
JP2010184595A (ja) * | 2009-02-12 | 2010-08-26 | Toyota Motor Corp | サイドエアバッグ装置及びサイドエアバッグの製造方法 |
WO2011132316A1 (ja) * | 2010-04-23 | 2011-10-27 | トヨタ自動車株式会社 | 車両用サイドエアバッグ装置 |
JP2016047667A (ja) * | 2014-08-27 | 2016-04-07 | 豊田合成株式会社 | エアバッグ装置 |
JP2017503720A (ja) * | 2014-01-21 | 2017-02-02 | ティーケー ホールディングス インク.Tk Holdings Inc. | 乗客側エアバッグ |
WO2017209192A1 (ja) * | 2016-06-01 | 2017-12-07 | オートリブ ディベロップメント エービー | 乗員保護装置 |
WO2019026663A1 (ja) * | 2017-08-02 | 2019-02-07 | オートリブ ディベロップメント エービー | 車両用サイドエアバッグ装置 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5917923B2 (ja) | 2012-01-23 | 2016-05-18 | 株式会社アドテックエンジニアリング | 露光光学系、露光装置および露光方法 |
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Patent Citations (9)
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JPS5247233A (en) * | 1975-10-09 | 1977-04-14 | Honda Motor Co Ltd | Air bag |
JPH07329693A (ja) * | 1994-06-10 | 1995-12-19 | Takata Kk | エアバッグの内圧調節装置 |
JPH1071923A (ja) * | 1996-08-30 | 1998-03-17 | Honda Motor Co Ltd | 車両用エアバッグ装置 |
JP2010184595A (ja) * | 2009-02-12 | 2010-08-26 | Toyota Motor Corp | サイドエアバッグ装置及びサイドエアバッグの製造方法 |
WO2011132316A1 (ja) * | 2010-04-23 | 2011-10-27 | トヨタ自動車株式会社 | 車両用サイドエアバッグ装置 |
JP2017503720A (ja) * | 2014-01-21 | 2017-02-02 | ティーケー ホールディングス インク.Tk Holdings Inc. | 乗客側エアバッグ |
JP2016047667A (ja) * | 2014-08-27 | 2016-04-07 | 豊田合成株式会社 | エアバッグ装置 |
WO2017209192A1 (ja) * | 2016-06-01 | 2017-12-07 | オートリブ ディベロップメント エービー | 乗員保護装置 |
WO2019026663A1 (ja) * | 2017-08-02 | 2019-02-07 | オートリブ ディベロップメント エービー | 車両用サイドエアバッグ装置 |
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