CN114379501B - Side airbag device for vehicle and occupant protection device - Google Patents
Side airbag device for vehicle and occupant protection device Download PDFInfo
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- CN114379501B CN114379501B CN202110940158.7A CN202110940158A CN114379501B CN 114379501 B CN114379501 B CN 114379501B CN 202110940158 A CN202110940158 A CN 202110940158A CN 114379501 B CN114379501 B CN 114379501B
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- vehicle
- chamber
- side airbag
- inflator
- occupant
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- 238000005452 bending Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 1
- 210000000038 chest Anatomy 0.000 description 19
- 210000004705 lumbosacral region Anatomy 0.000 description 13
- 210000001015 abdomen Anatomy 0.000 description 12
- 230000000694 effects Effects 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 7
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
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- 230000002093 peripheral effect Effects 0.000 description 4
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- 230000008859 change Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
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- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 210000001217 buttock Anatomy 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
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- 239000002649 leather substitute Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
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Classifications
-
- 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
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/261—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow with means other than bag structure to diffuse or guide inflation fluid
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Air Bags (AREA)
Abstract
The present invention relates to a vehicle side airbag device and an occupant protection device. In a side airbag device for a vehicle, at the time of a side collision of the vehicle, the side airbag is inflated and deployed to the side of an occupant by receiving supply of gas from an inflator. The side airbag has a head chamber and a lumbar chamber. In the side airbag, the duct extends in the vertical direction, and the gas from the inflator is ejected from the upper ejection port and the lower ejection port of the duct into the head chamber and the waist chamber, respectively. By the inclined shape set at the front edge portion of the waist chamber, the waist chamber is held laterally of the waist even in a state where the gas is ejected from the lower ejection port into the waist chamber.
Description
Technical Field
The present invention relates to a vehicle side airbag device and an occupant protection device provided with the same.
Background
In the vehicle side airbag device disclosed in japanese patent application laid-open No. 2011-105107, an inflator and an inner tube (duct) are housed in a side airbag provided with a head protection inflation portion (head chamber) and a waist protection inflation portion (waist chamber). In the event of a side collision of the vehicle, gas generated from the inflator is supplied to the head chamber and the lumbar chamber through the passages. Thus, the head chamber inflates and deploys to the side of the head of the occupant, and the lumbar chamber inflates and deploys to the side of the lumbar of the occupant. The same technique is disclosed in International publication No. 2011/016107 described below.
In the vehicle side airbag device disclosed in japanese patent application laid-open No. 2005-225351, an inflator and an inner tube (tunnel) are housed in a side airbag that can be protected from the shoulder to the waist of an occupant. In the event of a side collision of the vehicle, gas generated from the inflator is supplied to the upper and lower divided chambers of the side airbag via the passage. Thus, the upper compartment inflates and deploys to the sides of the shoulders and chest of the occupant, and the lower compartment inflates and deploys to the sides of the abdomen and waist of the occupant.
Disclosure of Invention
In each of the above conventional arts, the cylinder-type inflator is accommodated in the cylindrical passage. The inflator and the tunnel are supported by a side frame of the seat back. In such a configuration, in view of the configuration of the vehicle seat, the inflator and the tunnel are disposed in a posture of being inclined in a low front-rear direction. The gas is discharged from the lower discharge port of the passage toward the obliquely lower front side of the vehicle. Due to the gas discharge force, the lumbar region is displaced toward the vehicle front side with respect to the lumbar region of the occupant. As a result, the lumbar region cannot be properly restrained by the lumbar region chamber, and the absorption efficiency of collision energy is lowered.
The invention provides a vehicle side airbag device and an occupant protection device, which can prevent or inhibit the reduction of energy absorption efficiency caused by the position deviation of a waist chamber of a side airbag relative to the waist of an occupant to the front side of a vehicle due to the force of gas from an inflator.
The vehicle side airbag device of the first aspect of the invention is mounted on the vehicle width direction outside side portion of the seat back of the vehicle seat. The vehicle side airbag device is provided with: an inflator that generates gas when a side collision of a vehicle occurs; and a side airbag configured to receive supply of gas from the inflator and to inflate and expand from the side portion to the side of the occupant. The side airbag has a head chamber that protects the head of an occupant and a lumbar chamber that protects the lumbar region of the occupant. The side airbag device further includes a passage extending in the side airbag in the up-down direction of the side airbag and having an upper discharge port and a lower discharge port. The passage ejects the gas from the inflator from the upper ejection port and the lower ejection port into the head chamber and the waist chamber, respectively. The side airbag device further includes a holding portion that holds the lumbar chamber laterally of the lumbar in a state in which gas is ejected from the lower ejection port into the lumbar chamber.
The "side of the waist portion" described in the first aspect refers to, for example, a region overlapping the waist portion of the occupant when viewed in the vehicle width direction.
In the first aspect, a vehicle side airbag device is mounted on a vehicle width direction outer side portion of a seat back of a vehicle seat. In this vehicle side airbag device, gas is generated from the inflator at the time of a side collision of the vehicle, and the gas is supplied to the side airbag. Thus, the side airbag inflates and deploys from the side portion of the seatback to the side of the occupant. The side airbag has a head chamber that protects the head of an occupant and a lumbar chamber that protects the lumbar region of the occupant. Gas is ejected into the head chamber and the waist chamber from the upper ejection port and the lower ejection port of the passage extending in the vertical direction of the side airbag in the side airbag, respectively. The waist chamber is held laterally of the waist by the holding portion in a state where the gas is ejected from the lower ejection port into the waist chamber. This can prevent or suppress a decrease in the efficiency of absorbing collision energy by the lumbar chamber.
In the vehicle side airbag device according to the first aspect of the present invention, the holding portion may include the lumbar chamber in which a front edge portion is formed, and the front edge portion may be formed in a shape inclined so as to be inclined toward the vehicle rear side as it is directed toward the vehicle lower side in the inflated and deployed state of the side airbag.
According to the above configuration, in the inflated and deployed state of the side airbag, the front edge portion of the lumbar chamber is inclined so as to be inclined toward the vehicle rear side as it is toward the vehicle lower side. That is, the lumbar chamber is set in advance to a shape that is located at a position that is biased toward the rear of the vehicle in the inflated and deployed state of the side airbag. Therefore, even if the above-described lumbar chamber is displaced toward the vehicle front side due to the ejection force of the gas ejected from the lower side ejection port of the tunnel, the lumbar chamber can be held in the area on the side of the lumbar region of the occupant.
In the vehicle side airbag device according to the first aspect of the present invention, the holding portion may include an air flow generating portion that generates a flow of air toward a rear obliquely downward direction of the vehicle in the lumbar chamber.
According to the above configuration, in a state in which the gas is ejected from the lower ejection port of the duct into the lumbar chamber, a flow of the gas directed obliquely downward rearward of the vehicle is generated in the lumbar chamber. By this flow of gas, the lumbar chamber can be held laterally of the lumbar region.
In the side airbag device described above, the air flow generating portion may include the lower side discharge port of the passage that opens obliquely downward toward the rear of the vehicle in the inflated and deployed state of the side airbag.
According to the above configuration, in the inflated and deployed state of the side airbag, the lower side discharge port of the passage opens obliquely downward toward the rear of the vehicle. Thus, the gas discharged from the lower discharge port flows obliquely downward toward the rear of the vehicle.
In the side airbag device described above, the air flow generating portion may include a curved portion formed at a lower end portion of the passage so as to curve toward the vehicle rear side in the inflated and deployed state of the side airbag, and the lower side discharge port may be formed at a lower end of the curved portion.
According to the above configuration, in the inflated and deployed state of the side airbag, the curved portion formed at the lower end portion of the passage is curved toward the vehicle rear side. Thus, the gas ejected from the lower ejection port formed at the lower end of the curved portion flows obliquely downward toward the rear of the vehicle.
In the side airbag device described above, a three-point seat belt for restraining the occupant may be provided in the vehicle seat, and the head chamber may be configured to be inflated and deployed toward the head of the occupant with respect to a shoulder belt of the seat belt.
In the above-described structure, the head chamber of the side airbag is inflated and deployed toward the head side of the occupant (i.e., the vehicle width direction inner side) with respect to the shoulder belt of the three-point seat belt. This allows the expanded position of the head chamber to be brought close to the head of the occupant, and thus the initial restraint performance of the head can be improved. Further, since the head chamber can be pressed by the shoulder belt, displacement of the waist chamber toward the vehicle front side due to ejection of the gas from the lower side ejection port can be further suppressed.
In the side airbag device described above, the inflator may be fixed to a side frame of the seatback, and a connection portion extending from the passage may be connected to a gas discharge portion of the inflator, or the passage may extend in a height direction of the seatback at a position on a vehicle front side of the inflator when the side airbag is inflated and deployed.
In the side airbag device described above, the inflator is fixed to the side frame of the seat back. The gas discharge portion of the inflator is connected to a connection portion extending from the passage. Thereby, the gas from the inflator is introduced into the passage. The passage extends in the height direction of the seat back at a position on the vehicle front side of the inflator at the time of inflation and deployment of the side airbag. The passage is relatively pressurized in the side airbag by the gas introduced from the inflator. Since the high-pressure passage extends as described above, the passage can be used to effectively restrain, for example, the rear portion of the rib of the occupant.
In the side airbag device described above, the inflator may be a cylinder, or may be disposed in an axial direction along a height direction of the seatback. The gas discharge portion may be provided at a lower end portion of the inflator, and the connection portion of the passage may extend from a lower end portion side of the passage.
In the side airbag device described above, the connection portion extending from the lower end portion side of the passage is connected to the gas discharge portion provided at the lower end portion of the inflator. Thus, the gas from the inflator is supplied into the lumbar chamber via the passage in advance. As a result, the lumbar chamber can be inflated and deployed earlier than the head chamber, so that the lumbar chamber can be inflated and deployed earlier in a narrow gap between the lumbar region and the vehicle body side portion of the occupant.
An occupant protection device according to a second aspect of the present invention includes: a vehicle seat having a seat cushion and a seat back; a vehicle seat belt device having a three-point seat belt that restrains an occupant to the vehicle seat; and the side airbag device according to the first aspect mounted on the vehicle width direction outer side portion of the seatback.
According to the second aspect, an occupant is restrained in a vehicle seat having a seat cushion and a seat back by a three-point seat belt provided in the vehicle seat belt device. A vehicle side airbag device is mounted on a vehicle width direction outer side portion of the seat back. The vehicle side airbag device according to the first aspect is a vehicle side airbag device according to any one of the first aspect, and therefore the aforementioned operation and effects can be obtained.
As described above, in the vehicle side airbag device and the occupant protection device according to the present invention, it is possible to prevent or suppress a decrease in energy absorption efficiency caused by a positional displacement of the lumbar chamber toward the vehicle front side with respect to the lumbar of the occupant due to the force of the gas from the inflator.
Drawings
Features, advantages, technical and industrial significance of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings, in which like reference numerals denote like elements, in which:
fig. 1 is a side view showing a state in which a side airbag is inflated and deployed in the occupant protection apparatus of the first embodiment.
Fig. 2 is a front view showing a state in which the side airbag is inflated and deployed in the occupant protection apparatus of the first embodiment.
Fig. 3 is a side view showing a housed state of the side airbag.
Fig. 4 is a front view showing a housed state of the side airbag.
Fig. 5 is a side view corresponding to fig. 1 for explaining displacement of the lumbar chamber due to force of gas from the inflator.
Fig. 6 is a top cross-sectional view showing a cross-section taken along line F6-F6 in fig. 5, and is a view showing a side column collision.
Fig. 7 is a side view showing a state in which the side airbag is inflated and deployed in the occupant protection apparatus of the second embodiment.
Fig. 8 is a side view showing a state in which the side airbag is inflated and deployed in the occupant protection apparatus of the third embodiment.
Detailed Description
First embodiment
An occupant protection apparatus 10 according to a first embodiment of the present invention will be described below with reference to fig. 1 to 5. In each of the drawings, an arrow FR appropriately shown indicates a vehicle front direction, an arrow UP indicates a vehicle upper direction, and an arrow LH (OUT) indicates a vehicle left direction (vehicle width direction outer direction). Hereinafter, when the explanation is made using only the front-rear, left-right, and up-down directions, unless otherwise noted, the front-rear, left-right, and up-down directions in the vehicle front-rear direction, left-right, and up-down directions in the vehicle left-right direction (vehicle width direction) are shown.
As shown in fig. 1 and 2, the occupant protection device 10 of the present embodiment is constituted by a vehicle seat 12, a vehicle seat belt device 30, and a vehicle side airbag device 40. The vehicle seat 12 is, for example, a driver seat of a left-hand rudder vehicle or a passenger seat of a right-hand rudder vehicle, and is disposed on the left side in the vehicle cabin. The front-rear direction, the left-right direction (width direction), and the up-down direction of the vehicle seat 12 coincide with the front-rear direction, the left-right direction (width direction), and the up-down direction of the vehicle. When the vehicle seat 12 is disposed on the right side in the vehicle interior, the structure is bilaterally symmetrical to the present embodiment. The following sequentially describes the structures of the vehicle seat 12, the vehicle seatbelt device 30, and the vehicle side airbag device 40, and the main portions of the present embodiment will be described later.
Structure of vehicle seat
As shown in fig. 1 and 2, the vehicle seat 12 includes a seat cushion 14 that supports buttocks and thighs of an occupant P seated in the vehicle seat 12, a seat back 16 that is coupled to a rear end portion of the seat cushion 14 to support a back portion of the occupant P, and a headrest 22 that is coupled to an upper end portion of the seat back 16 to support a head portion H of the occupant P.
In fig. 1 and 2, a dummy for a crash test is seated on the vehicle seat 12 instead of the actual occupant P. The dummy P is AM50 (50 th percentile of adult males of americans) of an international unified side impact dummy (World Side Impact Dummy; worldSID). The dummy P is seated on the vehicle seat 12 by a seating method defined by a side collision test method. The front-rear position of the vehicle seat 12 relative to the vehicle and the reclining angle of the seatback 16 relative to the seat cushion 14 are adjusted to the reference setting position corresponding to the seating method described above. In this state, the front-rear, left-right, up-down direction of the seatback 16 coincides with the front-rear, left-right, up-down direction of the vehicle.
Six ribs R1, R2, R3, R4, R5, R6 are provided on the trunk of the dummy P. These ribs R1, R2, R3, R4, R5, R6 are sometimes referred to as "shoulder rib R1", "chest rib R2", "chest rib R3", "chest rib R4", "abdomen rib R5", "abdomen rib R6" in this order from the top. The shoulder rib R1 is provided on the shoulder S of the dummy P, the chest rib R2, the chest rib R3 and the chest rib R4 are provided on the chest C of the dummy P, and the abdomen rib R5 and the abdomen rib R6 are provided on the abdomen B of the dummy P. Hereinafter, the dummy P is sometimes referred to as "occupant P".
As shown in fig. 1, 3 and 4, the seat back 16 includes a seat back frame 18 as a skeleton member, a seat back cushion, not shown, that covers the seat back frame 18, and a seat back cover 20 that covers the seat back cushion. The seat back frame 18 is made of metal or resin, for example, and the seat back cushion is made of a foam such as polyurethane foam, for example. The seat back cover 20 is formed by sewing a plurality of cover sheets made of, for example, a cloth (woven fabric), a knitted material (knitted fabric), synthetic leather, or the like to each other.
The seat back frame 18 includes an outer frame 18A extending in the vehicle vertical direction in a side portion 16A on the vehicle width direction outer side of the seat back 16, and an inner frame 18B extending in the vehicle vertical direction in a side portion 16B on the vehicle width direction inner side of the seat back 16. The seatback frame 18 includes an upper frame 18C that connects upper ends of the outer frame 18A and the inner frame 18B to each other, and a lower frame 18D that connects lower ends of the outer frame 18A and the inner frame 18B to each other in the seat width direction. The side portion 16A is a portion of the seat back 16 that is on the outer side in the vehicle width direction, including a side support portion on the outer side in the vehicle width direction. The upper surface 16A1 of the side portion 16A forms a portion of the upper surface of the seat back 16. The side portion 16A corresponds to a "vehicle width direction outer side portion of the seatback" in the present invention, and the outer frame 18A corresponds to a "side frame" in the present invention. In the following description, the side portion 16A is referred to as "outer side portion 16A".
Structure of safety belt device for vehicle
As shown in fig. 1, the vehicle seatbelt device 30 includes a three-point webbing 32 for restraining an occupant. In fig. 1, only a shoulder belt 32A as a part of the belt 32 is shown.
One end portion of the webbing 32 in the longitudinal direction, which is not shown, is engaged with a fixing plate, which is not shown, that is fixed to a vehicle body floor or the like on the vehicle width direction outer side (here, the left side) with respect to the vehicle seat 12. The other end portion of the webbing 32, which is not shown, is engaged with a winding shaft of a retractor (webbing winding device), which is not shown, and which is disposed in a lower portion of a B-pillar or the like of the vehicle. The intermediate portion of the webbing 32 is folded back through a shoulder anchor, not shown, disposed at the upper portion of the B-pillar or the like. A tongue plate, not shown, is slidably mounted in the belt 32 at a portion between the shoulder anchor and the fixed plate. The tongue plate is coupled to a buckle device (not shown) attached to a lower end portion or the like of the vehicle seat 12 on the vehicle width direction inner side (right side in this case) of the vehicle seat 12. This brings about a state in which the seat belt 32 is worn by the occupant P. In this belt-fitted state, the chest C and the abdomen B of the occupant P are restrained by the shoulder belt 32A, which is a portion between the shoulder anchors and the tongue plates in the belt 32. In this state of belt wearing, the waist W of the occupant P is restrained by a seat belt, not shown, which is a portion between the tongue plate and the fixed plate in the seat belt 32.
Structure of side airbag device for vehicle
As shown in fig. 1 and 2, the vehicle side airbag device 40 includes an inflator 44, a side airbag 46, and a passage 48. The inflator 44 is operated to generate gas, and the side airbag 46 is inflated and deployed laterally of the occupant P by receiving supply of gas from the inflator 44 (the state shown in fig. 1 and 2). The duct 48 is housed inside the side airbag 46, and distributes the gas generated from the inflator 44 to the upper and lower portions of the side airbag 46.
The inflator 44, the side airbag 46, and the tunnel 48 are normally formed as the side airbag module 42 shown in fig. 3 and 4, and are housed in the outer side portion 16A of the seatback 16. In the following description, the front-rear vertical direction described with respect to the side airbag 46 indicates a direction in which the side airbag 46 is inflated and deployed, and is a direction substantially coincident with the front-rear vertical direction of the seatback 16.
As shown in fig. 1, the inflator 44 is a so-called cylinder type inflator, and is formed in a cylindrical shape. The inflator 44 is disposed outside the outer frame 18A in the vehicle width direction in a posture in which the axis direction is inclined in the height direction of the seatback 16, that is, in a posture in which the front is low and the rear is high. The inflator 44 is disposed at a height near the abdomen B of the occupant P, for example. A pair of upper and lower studs (not shown) protrude inward in the vehicle width direction from the outer peripheral portion of the inflator 44. The studs described above pass through the outer frame 18A. The studs are respectively screwed with nuts, not shown. Thus, the inflator 44 is mounted to the outer frame 18A. The stud protruding from the outer peripheral portion of the inflator 44 toward the vehicle rear side may be configured to penetrate a bracket or the like fixed to the outer frame 18A from the vehicle front side and be screwed with a nut (so-called back fastening).
The inflator 44 is provided with a discharge portion 44A at an upper end portion or a lower end portion (here, a lower end portion). The discharge portion 44A has a plurality of gas discharge ports arranged in the circumferential direction of the inflator 44, for example, and the gas is discharged radially from the plurality of gas discharge ports when the inflator 44 is activated (operated). As shown in fig. 1, a side collision ECU60 mounted on the vehicle is electrically connected to the inflator 44. A side collision sensor 62 for detecting a side collision is electrically connected to the side collision ECU60. The side collision ECU60 is configured to activate the inflator 44 when (an unavoidable side collision) is detected based on a signal from the side collision sensor 62. In the case where a collision prediction sensor (pre-collision sensor) for predicting (predicting) a side collision is electrically connected to the side collision ECU60, the inflator 44 may be activated when the side collision ECU60 predicts a side collision based on a signal from the collision prediction sensor.
As shown in fig. 1 and 2, the side airbag 46 is inflated and deployed between the occupant P and the vehicle body side portion (the side door SD shown in fig. 6 and the B pillar not shown) by receiving supply of gas from the inflator 44. The side airbag 46 is formed into a bag shape by, for example, overlapping two base cloths, which are formed by cutting out a nylon-based or polyester-based cloth material, and sewing the outer peripheral edge portions. The method of manufacturing the side airbag 46 is not limited to the above, and may be appropriately modified. For example, the side airbag 46 may be manufactured by folding a single base fabric in half and sewing the outer peripheral edge portion thereof. For example, the side airbag 46 may be manufactured by a tubular knitting method (so-called OPW method) performed by an automatic loom.
The side airbag 46 is inflated and deployed in an elongated shape having a long side in the height direction of the seat back 16. The side airbag 46 is formed in a size that can be restrained from the head H to the waist W of the occupant P. The side airbag 46 integrally includes a head chamber (head protection inflation portion) 46A that restrains the head H of the occupant P, a chest chamber (chest protection inflation portion) 46C that restrains the head from the shoulder S to the abdomen B of the occupant P, a connection chamber 46B that connects the head chamber 46A to the chest chamber 46C, and a waist chamber (waist protection inflation portion) 46D that restrains the waist W of the occupant P.
In the side airbag 46, the portions corresponding to the chest chamber 46C and the lumbar chamber 46D are inflated and expanded into a substantially elliptical shape having the height direction of the seatback 16 as a long side when viewed in the vehicle width direction. In the inflated and deployed state of the side airbag 46, the front edge portion of the chest chamber 46C is inclined to be low in front and high in rear. The front edge of the chest chamber 46C is brought into sliding contact with the upper arm a of the occupant P, whereby the upper arm a is pushed up upward around the shoulder S. Thereby, the upper arm portion a is prevented from being sandwiched between the chest C and the abdomen B and the chest chamber 46C.
An inflator connecting portion 46E extends from a lower portion of the rear edge portion of the side airbag 46 (here, a height portion where the waist portion W and the abdomen portion B of the occupant P are located) toward the vehicle rear side. An insertion port of the inflator 44 is formed at an upper end portion of the inflator connecting portion 46E, and a lower end portion of the inflator 44 is inserted into the inflator connecting portion 46E from the insertion port.
The head chamber 46A of the side airbag 46 is inflated and deployed in a substantially rectangular shape when viewed in the vehicle width direction. The head chamber 46A is inflated and deployed mainly on the head H side (vehicle width direction inner side) of the occupant P than the shoulder belt 32A of the belt 32. In the present embodiment, the inflated and deployed head chamber 46A contacts or approaches the head H of the occupant P from the vehicle width direction outside and faces it. The head chamber 46A in the inflated and expanded state is disposed so as to overlap with the substantially lower half of the head H and the neck N of the occupant P when viewed in the vehicle width direction.
An upper end portion of the connection chamber 46B is integrally connected to a substantially upper half portion of the rear edge portion of the head chamber 46A. The connection chamber 46B is formed in a substantially cylindrical shape. The lower end portion of the connection chamber 46B is integrally connected to the upper end portion of the chest chamber 46C. The chest chamber 46C communicates with the head chamber 46A via the connecting chamber 46B. The connection chamber 46B is inflated and expanded obliquely so as to be more inward in the vehicle width direction as seen in the vehicle front-rear direction, as it goes toward the vehicle upper side. The connection chamber 46B is inflated and deployed toward the vehicle lower side with respect to the shoulder belt 32A of the belt 32.
As shown in fig. 1 and 2, the passage 48 is housed inside the side airbag 46. The passage 48 has a function of guiding the gas from the inflator 44 into the lumbar chamber 46D and into the head chamber 46A. The duct 48 is configured by a duct main body portion 48A formed in a cylindrical shape and an inflator connecting portion 48B extending from a lower end portion side of the duct main body portion 48A toward a vehicle rear side. The tunnel body portion 48A is housed in the rear side in the side airbag 46 in a posture in which the axis direction is along the up-down direction of the side airbag 46. The passage main body portion 48A extends from an upper end portion to a lower end portion in the side airbag 46. An upper discharge port 50 as an upper opening is formed at the upper end of the channel main body 48A, and a lower discharge port 52 as a lower opening is formed at the lower end of the channel main body 48A. The upper discharge port 50 opens at the rear end portion in the head chamber 46A, that is, in the vicinity of the connection portion between the head chamber 46A and the connection chamber 46B. The lower discharge port 52 opens in the waist chamber 46D.
The inflator connecting portion 48B corresponds to a "connecting portion" in the present invention. The inflator connecting portion 48B is housed in the inflator connecting portion 46E of the side airbag 46 and overlaps the inside of the inflator connecting portion 46E. An insertion opening of the inflator 44 is formed at an upper end portion of the inflator connecting portion 48B. The insertion opening is disposed inside an insertion opening formed at an upper end portion of the inflator connecting portion 46E, and a lower end portion of the inflator 44 is inserted into the inflator connecting portion 48B from the insertion opening.
The inflator 44, the side airbag 46, and the duct 48 are formed as described above, and are housed in the outside side portion 16A as the side airbag module 42 shown in fig. 3 and 4 in a normal state. In the side airbag module 42, the side airbag 46 is folded into an elongated shape together with the passage 48 in a prescribed folding method. The portion of the side airbag 46 in the stored state including the head chamber 46A extends from the shoulder head 16S (reference numerals are omitted in the figures other than fig. 3 and 4) of the seat back 16 toward the headrest 22 side. Specifically, the side airbag 46 in the stored state is constituted by a longitudinal extension 42A extending in the height direction of the seat back 16 on the vehicle width direction outer side of the outer side frame 18A and a lateral extension 42B extending in the vehicle width direction on the vehicle rear side of the upper frame 18C, and the side airbag 46 in the stored state is bent at the height of the shoulder heads 16S of the seat back 16. The longitudinal extension 42A is constituted by a portion of the side airbag 46 corresponding mainly to the chest chamber 46C and the lumbar chamber 46D, and the lateral extension 42B is constituted by a portion of the side airbag 46 corresponding mainly to the head chamber 46A and the connection chamber 46B. The vehicle-width-direction inner side end portion of the lateral extension portion 42B is disposed on the vehicle-width-direction inner side with respect to the shoulder belt 32A as shown in fig. 4. In fig. 3 and 4, the inflator 44 is not shown.
In the vehicle side airbag device 40 having the above-described configuration, when the inflator 44 is operated, the gas ejected from the ejection portion 44A of the inflator 44 flows into the tunnel body portion 48A from the inflator connecting portion 48B. The gas flowing into the channel body 48A is ejected from the lower ejection port 52 and the upper ejection port 50 of the channel body 48A into the waist chamber 46D and the head chamber 46A, respectively. A part of the gas ejected into the lumbar chamber 46D and the head chamber 46A flows into the chest chamber 46C. Thereby, the side airbag 46 inflates and deploys to the side of the occupant P.
At the time of this inflation and deployment, the seat back 16 is split along a tear line portion (split line portion; split scheduled portion) provided in the seat back skin 20, at least one of a front surface or a side surface (neither reference numeral) of the outer side portion 16A and an upper surface 16A1 of the outer side portion 16A. Thereby, the side airbag 46 inflates and deploys outside the outside side portion 16A. At this time, the lumbar chamber 46D inflates and expands from the lower portion of the outer side portion 16A to the side of the lumbar region W, and the chest chamber 46C inflates and expands from the middle portion of the outer side portion 16A in the up-down direction to the sides of the shoulder S, chest C, and abdomen B. At this time, the head chamber 46A inflates and deploys from the upper surface 16A1 of the outer side portion 16A to the side of the head H and neck N, and the connection chamber 46B inflates and deploys from the upper end portion of the outer side portion 16A to the vehicle rear and upper side with respect to the shoulder S.
The duct body portion 48A extends in the up-down direction of the side airbag 46 within the side airbag 46 at the time of inflation and deployment of the side airbag 46. At the time of inflation and deployment of the side airbag 46, as shown in fig. 2, the connection chamber 46B and the tunnel body portion 48A of the side airbag 46 are configured to bend at bending portions 46B1, 48A1 (see fig. 2; reference numerals are omitted in fig. 1) located at the height of the shoulder heads 16S of the seat back 16. The connecting chamber 46B and the duct body portion 48A are inclined inward in the vehicle width direction at positions above the bent portions 46B1, 48A1 so that the head chamber 46A is disposed inward in the vehicle width direction than the chest chamber 46C and the waist chamber 46D. The cross-sectional area of the channel main body portion 48A at the upper end side of the bent portion 48A1 is set smaller than the cross-sectional area of the channel main body portion at the lower end side of the bent portion 48A 1.
As shown in fig. 1 and 2, the upper side discharge port 50 formed at the upper end portion of the tunnel body portion 48A is set to open in the head chamber 46A on the head H side of the occupant P of the shoulder belt 32A with respect to the seat belt 32 at the time of inflation and deployment of the side airbag 46. Specifically, the upper side discharge port 50 is set to open in the space between the vehicle width direction outer side surface 22S of the headrest 22, the shoulder belt 32A, and the upper end portion of the outer side portion 16A at the time of inflation and deployment of the side airbag 46. The upper side discharge port 50 is disposed adjacent to a bracket 22A (see fig. 2; omitted from fig. 1) of the headrest 22 on the vehicle front side and on the vehicle width direction outer side at the time of inflation and deployment of the side airbag 46. As shown in fig. 1, the upper side discharge port 50 is formed to open obliquely upward toward the front of the vehicle when the side airbag 46 is inflated and deployed. The upper side discharge port 50 is set to be disposed on the vehicle-width-direction inner side of the shoulder belt 32A with respect to the vehicle upper side of the shoulder belt 32A or at a height overlapping the shoulder belt 32A when the side airbag 46 is inflated and deployed. The gas is discharged from the upper discharge port 50 into the head chamber 46A obliquely upward in front of the vehicle.
As shown in fig. 1 and 2, the lower side discharge port 52 formed at the lower end portion of the tunnel body portion 48A is set to open in the lumbar chamber 46D at the time of inflation and deployment of the side airbag 46, and the entire portion thereof is located laterally to the lumbar portion W of the occupant P. The lower side discharge port 52 is formed to open toward the vehicle lower side (here, the vehicle lower side and slightly in front of the vehicle) when the side airbag 46 is inflated and deployed. The gas is discharged from the lower discharge port 52 toward the vehicle lower side into the lumbar chamber 46D.
As shown in fig. 1, in the above-described duct main body portion 48A, an inflator connecting portion 48B extending from the lower end portion side is connected to the lower end portion of the inflator 44. This results in the following structure: when the inflator 44 is operated (activated), the gas discharged from the discharge portion 44A provided at the lower end portion of the inflator 44 is discharged into the lumbar chamber 46D from the lower discharge port 52 formed at the lower end portion of the tunnel body portion 48A in an early stage. The gas discharged from the discharge portion 44A also flows into the upper end portion side of the channel main body portion 48A, and is discharged from the upper discharge port 50 of the channel main body portion 48A into the head chamber 46A. Thus, the tunnel main body portion 48A is configured to extend in the height direction of the seat back 16 (i.e., the up-down direction of the side airbag 46) at a position on the vehicle front side of the inflator 44 when the side airbag 46 is inflated and deployed. The passage 48 is relatively pressurized in the side airbag 46 by the gas introduced from the inflator 44. The high-pressure passage 48 can laterally restrain the substantially rear half of the chest C of the occupant P.
Here, in the present embodiment, the shape of the lumbar chamber 46D is set in consideration of the displacement (bending) of the lumbar chamber 46D toward the vehicle front side due to the gas being ejected from the lower side ejection port 52 of the tunnel body portion 48A into the lumbar chamber 46D as described above. That is, the lumbar chamber 46D of the side airbag 46 is formed in a shape that is curved to the vehicle rear side with respect to the thoracic chamber 46C so as to be inflated and deployed toward the vehicle rear. The front edge portion 46D1 of the waist chamber 46D is formed in a shape inclined so as to be inclined toward the vehicle rear side as it is toward the vehicle lower side in the inflated and deployed state of the side airbag 46. The front edge 46D1 is set to have an inclination angle in the range of, for example, 10 degrees to 30 degrees with respect to the vertical direction (vertical direction) of the vehicle. The waist chamber 46D formed by inclining the front edge 46D1 in this way constitutes a holding portion for holding the waist chamber 46D laterally of the waist W in a state in which gas is ejected from the lower ejection port 52 of the channel main body portion 48A into the waist chamber 46D. The "side of the waist portion W" refers to a region overlapping the waist portion W of the occupant P when viewed in the vehicle width direction. The straight line L1 shown in fig. 1 is a virtual straight line along the vertical direction of the vehicle, and the straight line L2 shown in fig. 1 is a virtual straight line passing through the front end FE and the lower end LE of the side airbag 46. In fig. 1, for convenience of description, the front end FE and the lower end LE of the side airbag 46 are marked with white circles. In fig. 1, an angle θ formed by the straight line L1 and the straight line L2 is 30 degrees.
Action and Effect
Next, the operation and effects of the present embodiment will be described.
In the present embodiment, when the side collision ECU60 detects a side collision based on a signal from the side collision sensor 62, the inflator 44 is activated by the side collision ECU 60. Thus, the gas generated from the inflator 44 flows into the channel main body portion 48A of the channel 48 via the inflator connection portion 48B of the channel 48, and is ejected from the upper ejection port 50 and the lower ejection port 52 into the head chamber 46A and the waist chamber 46D. As a result, the side airbag 46 inflates and deploys from the outer side portion 16A of the seatback 16 to the side of the occupant P. In the side airbag 46, the head chamber 46A inflates and deploys to the side of the head H of the occupant P, and the lumbar chamber 46D inflates and deploys to the side of the lumbar region W of the occupant P.
In the inflated and deployed state of the side airbag 46, the front edge portion 46D1 of the lumbar chamber 46D is inclined so as to be inclined toward the vehicle rear side as it is toward the vehicle lower side. The lumbar chamber 46D is set in advance to be positioned to be offset to the rear of the vehicle in the inflated and deployed state of the side airbag 46. Therefore, as shown in fig. 5, even if the lumbar chamber 46D is displaced toward the vehicle front side due to the ejection force of the gas ejected from the lower ejection port 52 of the duct 48, the lumbar chamber 46D can be held in the area laterally of the lumbar region W. In fig. 5, the state in which the lumbar chamber 46D is displaced toward the vehicle front side as described above is indicated by a solid line, and the state in which the lumbar chamber 46D is inflated and expanded in a predetermined shape is indicated by a two-dot chain line. That is, as described above, the waist chamber 46D with the inclined front edge 46D1 functions as a holding portion that holds the waist chamber 46D laterally of the waist W in a state in which the gas is ejected from the lower ejection port 52 of the duct 48 into the waist chamber 46D. This can prevent or suppress a decrease in the absorption efficiency of the collision energy by the lumbar chamber 46D.
IN particular, IN the side pillar collision test, as shown by the two-dot chain line IN fig. 6, when the waist chamber 46D is displaced (bent) toward the vehicle front side, the waist chamber 46D is displaced toward the vehicle front side with respect to the intrusion guide line L3 of the pillar PL that intrudes IN the direction of the arrow IN fig. 6, and energy absorption at the target position is not performed. In this regard, in the present embodiment, as shown by the solid line in fig. 6, the lumbar chamber 46D can be appropriately held on the invasion guide line L3 of the column PL. As a result, the collision energy can be efficiently absorbed by the lumbar chamber 46D. Further, the above-described effect can be obtained by only slightly changing the design in which the front edge portion 46D1 of the lumbar chamber 46D is formed in the shape as described above, and therefore the structure can be simplified.
In the present embodiment, the three-point seat belt 32 is used to restrain the occupant P in the vehicle seat 12, and the head chamber 46A of the side airbag 46 is inflated and deployed toward the head H side (i.e., the vehicle width direction inner side) of the occupant P with respect to the shoulder belt 32A of the seat belt 32. This allows the inflated and deployed position of the head chamber 46A to be brought close to the head H of the occupant P, and thus the initial restraining performance of the head H can be improved. Further, since the head chamber 46A can be pressed by the shoulder belt 32A, displacement of the waist chamber 46D toward the vehicle front side due to the ejection of the gas from the lower side ejection port 52 can be further suppressed. In addition, according to the present embodiment, at the time of inflation and deployment of the side airbag 46, the upper side discharge port 50 is disposed on the vehicle width direction inner side of the shoulder belt 32A with respect to the vehicle upper side of the shoulder belt 32A or at a height overlapping the shoulder belt 32A when viewed from the vehicle width direction. The head chamber 46A is inflated and expanded by the gas ejected from the upper ejection port 50. This makes it easy to prevent the head chamber 46A from expanding and expanding laterally of the head H by the vehicle lower side and the vehicle width direction outer side with respect to the shoulder belt 32A.
In the present embodiment, the inflator connection portion 48B extending from the tunnel body portion 48A is connected to the discharge portion 44A of the inflator 44 fixed to the outer frame 18A of the seat back 16. Thereby, the gas from the inflator 44 is introduced into the passage 48. The passage 48 extends in the height direction of the seat back 16 at a position on the vehicle front side of the inflator 44 when the side airbag 46 is inflated and deployed. The passage 48 is relatively pressurized in the side airbag 46 by the gas introduced from the inflator 44. Since the high-pressure passage 48 extends as described above, the passage 48 can be used to effectively restrain, for example, the rear portion of the rib of the occupant P.
In the present embodiment, the inflator connecting portion 48B extending from the lower end portion side of the duct main body portion 48A is connected to the gas discharge portion 44A provided at the lower end portion of the inflator 44. Thus, the gas from the inflator 44 is ejected from the lower ejection port 52 of the duct body 48A into the waist chamber 46D early. As a result, the lumbar chamber 46D can be inflated and deployed earlier than the head chamber 46A, so that the lumbar chamber 46D can be inflated and deployed earlier in the narrow gap between the lumbar region W and the vehicle body side portion of the occupant P. This can improve the initial restraint performance of the side airbag 46 for the occupant.
Next, another embodiment of the present invention will be described. The same reference numerals as those of the first embodiment are given to the substantially same structures and functions as those of the first embodiment, and the description thereof is omitted.
Second embodiment
Fig. 7 is a side view showing a state in which the side airbag 46 inflates and deploys in the occupant protection device 10 according to the second embodiment of the present invention. In this embodiment, the lower side discharge port 52S of the passage 48 is formed to open obliquely downward toward the rear of the vehicle in the inflated and deployed state of the side airbag 46. The gas is discharged from the lower discharge port 52S obliquely downward toward the rear of the vehicle. The lower discharge port 52S constitutes an air flow generating portion that generates a flow of air obliquely downward toward the rear of the vehicle with respect to the vertical direction of the vehicle when the side airbag 46 is inflated and deployed. The air flow generating portion constitutes a holding portion for holding the waist chamber 46D laterally of the waist W in a state in which air is ejected from the lower ejection port 52S into the waist chamber 46D. The arrow G shown in fig. 7 shows the ejection direction of the gas from the lower ejection port 52S.
In this embodiment, the configuration other than the above is the same as that of the first embodiment. Thus, in this embodiment, the same operation and effects as those of the first embodiment can be obtained. In this embodiment, the gas discharged from the lower discharge port 52S opening obliquely downward toward the rear of the vehicle flows obliquely downward toward the rear of the vehicle as described above. Displacement of the lumbar chamber 46D toward the vehicle front side can be suppressed by the gas discharge force. This improves the effect of holding the lumbar chamber 46D laterally of the lumbar portion W. Further, the above-described effect can be obtained by only a slight design change in which the duct body portion 48A is cut obliquely to form the lower side discharge port 52S as described above, and therefore the structure can be simplified.
Third embodiment
Fig. 8 is a side view showing a state in which the side airbag 46 inflates and deploys in the occupant protection device 10 according to the third embodiment of the present invention. In this embodiment, a curved portion 48C formed to curve toward the vehicle rear side in the inflated and deployed state of the side airbag 46 is provided at the lower end portion of the passage 48. The bent portion 48C is set to be bent toward the vehicle rear side with respect to the vertical direction of the vehicle. A lower ejection port 52 is formed at the lower end of the curved portion 48C. The gas is discharged from the lower discharge port 52 toward the obliquely downward rear of the vehicle. The curved portion 48C described above constitutes an air flow generating portion that generates a flow of air directed obliquely downward rearward of the vehicle with respect to the vertical direction of the vehicle when the side airbag 46 is inflated and deployed. The air flow generating portion constitutes a holding portion for holding the waist chamber 46D laterally of the waist W in a state in which air is ejected from the lower ejection port 52 into the waist chamber 46D. The arrow G shown in fig. 8 shows the ejection direction of the gas from the lower ejection port 52.
In this embodiment, the configuration other than the above is the same as that of the first embodiment. Thus, in this embodiment, the same operation and effects as those of the first embodiment can be obtained. In this embodiment, the curved portion 48C formed at the lower end portion of the passage 48 is curved toward the vehicle rear side when the side airbag 46 is inflated and deployed. This makes it possible to cause the gas discharged from the lower discharge port 52 formed at the lower end of the bent portion 48C to be directed obliquely downward toward the rear of the vehicle. As a result, displacement of the waist chamber 46D toward the vehicle front side can be suppressed by the ejection force of the gas ejected from the lower ejection port 52. This improves the effect of holding the lumbar chamber 46D laterally of the lumbar portion W. Further, the above-described effect can be obtained by only a slight design change in which the above-described bent portion 48C is set at the lower end portion of the passage 48, and therefore the structure can be simplified.
Supplementary description of the embodiments
In the second and third embodiments described above, the front edge portion 46D1 of the lumbar chamber 46D is inclined so as to be inclined toward the vehicle rear side as it is toward the vehicle lower side in the inflated and deployed state of the side airbag 46, but the present invention is not limited thereto. For example, in the second and third embodiments described above, the front edge portion of the waist chamber 46D may be configured to extend in the vertical direction of the vehicle in the inflated and deployed state of the side airbag 46.
In the above embodiments, the discharge portion 44A is provided at the lower end portion of the inflator 44, but the present invention is not limited to this, and the gas discharge portion may be provided at the upper end portion of the inflator 44. In this case, for example, the inflator connecting portion 48B of the duct 48 extends from the middle portion of the duct main body portion 48A in the up-down direction.
In the above embodiments, the passage 48 extends in the up-down direction of the seat back 16 at the vehicle front side of the inflator 44 during inflation and deployment of the side airbag 46, but the present invention is not limited to this. The inflator may be housed entirely inside the duct.
In the above embodiments, the head chamber 46A is configured to expand and deploy toward the head H side of the occupant P with respect to the shoulder belt 32A of the three-point belt 32, but the present invention is not limited thereto. The head chamber 46A may be inflated and deployed to the opposite side of the shoulder belt 32A from the head H, that is, to the vehicle width direction outside.
The present invention may be modified in various ways without departing from the spirit thereof. The scope of the present invention is not limited to the above embodiments.
Claims (6)
1. A side airbag device for a vehicle, which is mounted on a vehicle width direction outside side portion of a seat back of a vehicle seat,
the vehicle side airbag device includes:
an inflator that generates gas when a side collision of a vehicle occurs;
a side airbag configured to receive supply of gas from the inflator, expand and deploy laterally of an occupant from the side portion, and having a head chamber protecting a head of the occupant and a waist chamber protecting a waist of the occupant;
a passage extending in the vertical direction of the side airbag in the side airbag and having an upper side discharge port and a lower side discharge port, the passage discharging gas from the inflator into the head chamber and the waist chamber from the upper side discharge port and the lower side discharge port, respectively; and
A holding portion that suppresses bending of the lumbar chamber toward the vehicle front side and holds the lumbar chamber laterally of the lumbar in a state in which the side airbag is inflated and deployed and gas is ejected from the lower side ejection port into the lumbar chamber,
the holding portion includes an air flow generating portion that generates a flow of air toward a rear obliquely downward direction of the vehicle in the lumbar chamber,
the air flow generating portion includes a curved portion formed at a lower end portion of the passage so as to curve toward a vehicle rear side in an inflated and deployed state of the side airbag, the lower side ejection port being formed at a lower end of the curved portion,
the side airbag in the stored state is constituted by a longitudinal extension portion extending in the height direction of the seatback on the vehicle width direction outer side of the outer side frame of the seatback and a lateral extension portion extending in the vehicle width direction on the vehicle rear side of the upper frame of the seatback, the side airbag in the stored state is curved at the height of the shoulder head of the seatback, a portion including the head chamber extends from the shoulder head of the seatback toward the headrest side of the vehicle seat,
An upper end portion of a connection chamber is integrally connected to an upper half portion of a rear edge portion of the head chamber, a lower end portion of the connection chamber is integrally connected to an upper end portion of a chest chamber, the chest chamber communicates with the interior of the head chamber via the connection chamber, the connection chamber is inflated and expanded obliquely so as to be more toward an upper side of the vehicle and more toward an inner side in a vehicle width direction when viewed from a vehicle front-rear direction,
the upper side discharge port formed at the upper end portion of the main body portion of the passage is set to be disposed on the vehicle width direction inner side of the shoulder belt with respect to the vehicle upper side of the shoulder belt or at a height overlapping the shoulder belt when seen in the vehicle width direction at the time of inflation and deployment of the side airbag.
2. The vehicle side airbag apparatus according to claim 1, characterized in that,
the retaining portion includes the lumbar chamber in which a front edge portion is formed, and the front edge portion is formed in a shape that is inclined so as to be inclined toward the vehicle rear side as it is toward the vehicle lower side in the inflated and deployed state of the side airbag.
3. The vehicle side airbag apparatus according to claim 1, characterized in that,
The vehicle seat is provided with a three-point seat belt for restraining an occupant, and,
the head chamber is configured to expand and deploy toward the head of the occupant with respect to a shoulder belt of the seat belt.
4. The vehicle side airbag apparatus according to claim 1, characterized in that,
the inflator is fixed to a side frame of the seatback,
a connecting portion extending from the passage toward the vehicle rear side is connected to the gas ejection portion of the inflator, and,
the passage extends in the height direction of the seatback at a position on the vehicle front side of the inflator at the time of inflation and deployment of the side airbag,
the upper side discharge port is set to be open in a space between a vehicle width direction outer side surface of the headrest of the vehicle seat, a shoulder belt of the three-point seat belt, and an upper end portion of a vehicle width direction outer side portion of the seatback, at the time of inflation and deployment of the side airbag.
5. The vehicle side airbag apparatus according to claim 4, characterized in that,
the inflator is a cylinder type, is disposed in a posture along a height direction of the seat back in an axial direction,
The gas ejection portion is provided at a lower end portion of the inflator, and,
the connecting portion of the passage extends from a lower end portion side of the passage.
6. An occupant protection apparatus comprising:
a vehicle seat having a seat cushion and a seat back;
a vehicle seat belt device having a three-point seat belt that restrains an occupant to the vehicle seat; and
the side airbag device according to any one of claims 1 to 5 mounted on a vehicle width direction outer side portion of the seatback.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-177570 | 2020-10-22 | ||
| JP2020177570A JP7380520B2 (en) | 2020-10-22 | 2020-10-22 | Vehicle side airbag devices and occupant protection devices |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114379501A CN114379501A (en) | 2022-04-22 |
| CN114379501B true CN114379501B (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110940158.7A Active CN114379501B (en) | 2020-10-22 | 2021-08-17 | Side airbag device for vehicle and occupant protection device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7380520B2 (en) |
| CN (1) | CN114379501B (en) |
| DE (1) | DE102021120293A1 (en) |
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| JP2011105107A (en) * | 2009-11-16 | 2011-06-02 | Toyoda Gosei Co Ltd | Gas distribution structure of airbag device |
| CN205652092U (en) * | 2016-04-11 | 2016-10-19 | 奥托立夫开发公司 | Vehicle seat |
| KR102096845B1 (en) * | 2018-11-07 | 2020-04-06 | 아우토리브 디벨롭먼트 아베 | Airbag apparatus of vehicle |
| WO2020110586A1 (en) * | 2018-11-30 | 2020-06-04 | オートリブ ディベロップメント エービー | Side airbag device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114379501A (en) | 2022-04-22 |
| DE102021120293A1 (en) | 2022-04-28 |
| JP2022068728A (en) | 2022-05-10 |
| JP7380520B2 (en) | 2023-11-15 |
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