WO2013077229A1 - Airbag device - Google Patents
Airbag device Download PDFInfo
- Publication number
- WO2013077229A1 WO2013077229A1 PCT/JP2012/079483 JP2012079483W WO2013077229A1 WO 2013077229 A1 WO2013077229 A1 WO 2013077229A1 JP 2012079483 W JP2012079483 W JP 2012079483W WO 2013077229 A1 WO2013077229 A1 WO 2013077229A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- airbag
- occupant
- exhaust state
- flap
- switching member
- Prior art date
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Classifications
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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
- B60R21/23—Inflatable members
- B60R21/239—Inflatable members characterised by their venting means
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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
- B60R2021/23382—Internal tether means
- B60R2021/23384—Internal tether means having ends which are movable or detachable during deployment
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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
- B60R21/239—Inflatable members characterised by their venting means
- B60R2021/2395—Inflatable members characterised by their venting means comprising means to control the venting
-
- 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
- B60R21/205—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in dashboards
Definitions
- the present invention relates to an airbag device for protecting a vehicle occupant.
- Patent Document 1 an exhaust state switching member that is freely changeable between a non-exhaust state and an exhaust state is attached to the opening of the airbag body. A part of the inner peripheral portion of the airbag body and the exhaust state switching member are connected via a tether belt. In the normal shape inflated and deployed state of the airbag body, the tether belt is retracted so as to introduce the exhaust state switching member into the airbag body. Thus, gas exhaust from the opening is suppressed, and the airbag is rapidly inflated and deployed.
- the airbag body has the above-mentioned regular shape.
- the shape is contracted more than the expanded state, and the tension amount of the tether belt is smaller than the above state. For this reason, gas is exhausted from the said opening part, and the rapid expansion
- an object of the present invention is to make it possible to suppress rapid inflation and deployment of an airbag body regardless of the position and posture of an occupant as much as possible during an irregular posture.
- an airbag device includes an airbag main body having a gas supply port, an inflator for supplying gas into the airbag main body through the gas supply port, and the airbag main body.
- Exhaust gas that is provided in the air bag body and that is drawn into the air bag body so that the gas in the air bag body can be exhausted is switched to a non-exhaust state that suppresses the exhaust of gas in the air bag body
- a state switching member a connecting member that connects the exhaust state switching member and a part of the inner peripheral portion of the airbag body, a proximal end portion connected to the outer peripheral portion of the airbag body, and a distal end portion A flap extending toward the opposite side of the gas supply port so as to cover the airbag body.
- a 2nd aspect is an airbag apparatus which concerns on a 1st aspect, Comprising:
- the said flap is a normal attitude
- a third aspect is the airbag device according to the first or second aspect, wherein the front end portion of the flap includes an occupant in an irregular posture and the airbag body when the airbag body is inflated and deployed. Between the passenger and the airbag body so as not to be sandwiched between the airbag body and the airbag body.
- a fourth aspect is the airbag device according to any one of the first to third aspects, wherein a tip portion of the flap exceeds a position where the connecting member is connected to the airbag body. So as to extend.
- a fifth aspect is the airbag device according to any one of the first to fourth aspects, wherein a base end portion of the flap is located away from a peripheral edge portion of the gas supply port. It is connected with the outer periphery.
- a sixth aspect is the airbag device according to any one of the first to fifth aspects, wherein a base end portion of the flap is from a position where the connecting member is connected to the airbag body. Is also connected to the outer periphery of the airbag body on the gas supply port side.
- the airbag device when the airbag main body is inflated and deployed in a non-regular posture and the flap comes into contact with the occupant, the inflation of the airbag main body is suppressed at that portion.
- the partial expansion of the airbag body it is possible to suppress the pulling of the connecting member and to suppress the exhaust state switching member from being switched to or maintained in the non-exhaust state.
- the non-regular posture it is possible to suppress the rapid inflation and deployment of the airbag body regardless of the position and posture of the occupant as much as possible.
- the occupant is at least in a region of the airbag main body in front of a portion that comes into contact with the occupant in the normal posture from the edge of the gas supply port when the airbag main body is inflated and deployed. It is assumed that it often contacts a part. Therefore, as in the second aspect, by providing a flap in at least a part of the region, partial inflation and deployment of the airbag main body in the arrangement region can be suppressed. As a result, the pulling of the connecting member can be suppressed, and the exhaust state switching member can be prevented from being switched to or maintained in the non-exhaust state. Sudden expansion and expansion can be suppressed.
- the front end of the flap is sandwiched between the occupant and the airbag body, and the inflation and deployment is suppressed at the portion of the airbag body covered with the flap.
- the pulling of the connecting member and the switching or maintenance of the exhaust state switching member to the non-exhaust state are suppressed, and the rapid inflation and deployment of the airbag body can be suppressed.
- the front end of the flap is not sandwiched between the occupant and the airbag body, and the airbag body is inflated and deployed.
- the connecting member is pulled, and the exhaust state switching member is switched or maintained in the non-exhaust state, so that the airbag body can be quickly inflated and deployed.
- the front end of the flap extends beyond the position where the connecting member is connected to the airbag main body, so that the airbag main body is near the connecting position of the connecting member. Therefore, the pulling of the connecting member and the switching or maintaining of the exhaust state switching member to the non-exhaust state are suppressed, and the rapid expansion and deployment of the airbag body can be suppressed.
- the vicinity of the gas supply port in the airbag body can be inflated smoothly.
- the expansion and deployment of the portion on the gas supply port side of the airbag body can be suppressed more than the position where the connection member is connected. it can.
- the exhaust state switching member can be switched to or maintained in the non-exhaust state, and further, rapid inflation and deployment of the airbag body can be suppressed.
- FIG. 1 is a view showing a state after the inflation and deployment of the airbag device 10 is completed
- FIGS. 2 and 3 are views showing an exhaust state switching member in a non-exhaust state
- FIGS. 4 to 6 are in an exhaust state. It is a figure which shows a certain exhaustion state switching member.
- the airbag device 10 is a device that is incorporated in a dashboard in front of the passenger seat of the vehicle, deploys in front of the passenger in the passenger's seat, and absorbs the impact by receiving the passenger in the passenger seat.
- the airbag apparatus is not limited to the airbag apparatus for the passenger seat, but can be applied to an airbag for a driver's seat incorporated in a steering apparatus.
- the airbag device 10 includes an airbag body 20, an inflator 12, an exhaust state switching member 30, a tether belt 40 as a connecting member, and a flap 50.
- the airbag body 20 is formed in a bag shape that can be inflated and deployed, and has a gas supply port 26h and at least one opening 28h.
- the airbag main body 20 is formed into a bag shape by the following configuration, for example. That is, the substantially cylindrical base fabric portion 22 is formed by joining the both edge portions of the substantially strip-shaped cloth by sewing or the like. Also, a pair of side cloth portions 24 having a widened shape capable of closing the side openings of the base cloth portion 22 are prepared, and the side cloth portions are respectively provided on the peripheral edge portions of the both side openings of the base cloth portion 22 formed in a substantially cylindrical shape. 24 edges are joined together by sewing. Thereby, the bag-shaped airbag main body 20 is formed.
- the airbag main body 20 is formed in a shape inflating from the upper side of the inflator 12 toward the occupant side (the rear side of the vehicle, the right side in FIG. 1) and inflating downward at the occupant side portion in a side view.
- the shape and combination of the base fabric for forming the airbag body 20 in a bag shape are not limited to the above examples.
- the gas supply port 26h is formed at one side portion of the base fabric portion 22, here, at a portion facing the dashboard in an expanded and deployed form.
- the inflator 12 is attached to the gas supply port 26h.
- the gas generated in the inflator 12 at the time of a vehicle collision or the like is introduced into the airbag body 20 through the gas supply port 26h.
- the opening 28h is a gas discharge hole.
- the opening portion 28h is formed at one side of the base fabric portion 22, here, at a position obliquely above the gas supply port 26h (a position facing the front window) in a developed form.
- the opening 28 h is formed in a long hole shape extending along the width direction of the airbag body 20.
- the opening 28h is not limited to a long hole shape, and may be formed in a circular hole shape or a polygonal hole shape.
- the 2nd vent hole may be formed in the said airbag main body 20 separately from the opening part 28h.
- the second vent hole is formed, for example, on both sides of the airbag body 20 in the deployed form.
- Various exhaust patterns can be set by combining the exhaust through the second vent hole and the exhaust mode via the exhaust state switching member 30.
- the exhaust state switching member 30 is provided in the opening 28h, and is in an exhaust state in which the gas in the airbag body 20 can be exhausted before being drawn into the airbag body 20 (FIG. 4 to FIG. 4). 6), by being pulled into the airbag body 20, the exhaust state is switched to a non-exhaust state (see FIGS. 1 to 3) that suppresses the exhaust of gas in the airbag body 20. Has been. Then, the exhaust state switching member 30 changes the state between these two states in accordance with the pulling force by the tether belt 40 described later.
- the exhaust state switching member 30 has a pair of belt-like cloths 32.
- One end portions (base end portions) of the pair of belt-like cloths 32 are sewn so as to surround the peripheral edge portion of the opening 28 h in the airbag body 20.
- the exhaust state switching member 30 may be sewn to the airbag body 20 on the outer surface of the airbag body 20.
- the other end portions (tip portions) of the pair of belt-like cloths 32 are stitched together and joined substantially over the entire width direction.
- both side portions of the pair of belt-like cloths 32 are stitched and joined only at their base ends, and the other portions are in an open state where they are not stitched.
- the 1st vent hole 32h is comprised by the part enclosed by the non-sewn part among the both sides of a pair of strip
- the width dimension of the pair of belt-like cloths 32 is set larger than the width dimension of the opening 28h, and therefore the width dimension of the exhaust state switching member 30 is also set larger than the width dimension of the opening 28h. Yes.
- the exhaust state switching member 30 can pass through the opening 28h while being deformed so as to shrink in the width direction. Resistor is acting.
- the exhaust state switching member 30 is prevented from being inadvertently changed when, for example, a pull-in force by a tether belt 40, which will be described later, or an internal pressure exceeding a predetermined value is not applied to the airbag body 20.
- the exhaust state switching member 30 When the exhaust state switching member 30 is led out of the airbag body 20 together with the first vent hole 32h forming portion, the exhaust state switching member 30 is in an exhaust state in which the gas in the airbag body 20 can be exhausted through the first vent hole 32h. (See FIGS. 4, 5, and 6). On the other hand, when the exhaust state switching member 30 is introduced into the airbag main body 20 together with the first vent hole 32h forming portion, the exhaust state switching member 30 covers the opening 28h so as to block the gas exhaust in the airbag main body 20. (See FIGS. 1, 2 and 3).
- the tether belt 40 is a member that connects the exhaust state switching member 30 and a part of the inner peripheral portion of the airbag body 20.
- the tether belt 40 receives the inflation and deployment force due to the gas supply from the inflator 12 to cause the exhaust state switching member 30 to move inside the airbag body 20.
- the exhaust state switching member 30 of the tether belt 40 Pulling is suppressed. As a result, the exhaust state switching member 30 is allowed to change to the exhaust state.
- the configuration of the exhaust state switching member 30 is not limited to the above example.
- the bottom side 232a which is the long side of the pair of substantially trapezoidal cloths 232, is sewn and attached to the opening 28h of the airbag body 20, and a pair of substantially The upper sides 232b, which are the short sides of the trapezoidal cloth 232, are sewn and joined together.
- one end of the long tether belt 240 is connected to the joint portion of the upper side of the pair of substantially trapezoidal cloths 232.
- a pair of first vent holes 232 h are formed by the portions surrounded by the oblique sides 232 c of the pair of substantially trapezoidal cloths 232.
- the bottom side 332a which is the long side of the pair of substantially trapezoidal cloths 332 is attached to the opening 28h of the airbag body 20 by sewing. Both oblique sides 332c of the trapezoidal cloth 332 are stitched together and joined. Then, one end of a long tether belt 340 is connected to each upper side 332b of the pair of substantially trapezoidal cloths 332.
- a first vent hole 332h (refer to a thick line portion) is formed by a portion surrounded by the upper side 332b of the pair of substantially trapezoidal cloths 332.
- the bottom side 432a which is the long side of the pair of substantially trapezoidal cloths 432 is sewn and attached to the opening 28h of the airbag body 20, and both the pair of substantially trapezoidal cloths 432 are attached.
- the oblique sides 432c and the upper sides 432b are sewn and joined.
- one end of a long tether belt 440 is connected to each upper side of the pair of substantially trapezoidal cloths 432.
- a hole is formed in one or both of the pair of substantially trapezoidal cloths 432, and this is used as a first vent hole 432h.
- the tether belt 40 is formed in an elongated band shape by a long member, here, cloth or the like.
- One end of the tether belt 40 is connected to the tip of the exhaust state switching member 30.
- both end portions on the distal end side of the exhaust state switching member 30 are connected to the tether belt 40. That is, one end portion of the tether belt 40 is formed to have substantially the same width as the tip portion of the exhaust state switching member 30.
- the tip 52 of the tether belt 40 is formed in a shape that spreads in a Y shape. Then, both end portions extending in a substantially Y shape are sewn on both sides of the distal end portion of the exhaust state switching member 30.
- the tether belt 40 pulls the exhaust state switching member 30 into the airbag body 20 so as to pull both end portions on the front end side of the exhaust state switching member 30.
- it is not essential that the tip portion of the tether belt 40 is formed in a Y-shaped shape as described above.
- the other end portion of the tether belt 40 does not normally come into contact with an occupant in a normal posture of the airbag body 20, but the portion that comes into contact with an occupant in a non-regular posture, that is, the airbag body 20 tries to inflate and deploy. At this time, it is connected by sewing or the like to the inner peripheral portion of the portion that comes into contact with the head or chest disposed in the immediate vicinity of the dashboard.
- the other end portion of the tether belt 40 is attached to a portion facing the inflator 12.
- the head or chest of an occupant in a non-regular posture is present on the occupant side above or just above the dashboard.
- the other end portion of the tether belt 40 is placed on the airbag main body 20 at a position close to the occupant side from directly above or directly above the dashboard. It is preferable that it is connected.
- the length of the tether belt 40 is set to a length dimension that satisfies the following conditions. That is, while the airbag body 20 is deployed and inflated into a regular shape, the airbag body 20 (particularly, a portion near the connecting portion of the tether belt 40) comes into contact with the head or chest of an occupant in an irregular position and is in an exhausted state. In a state where the expansion between the connecting portions of the switching member 30 and the tether belt 40 is partially hindered (hereinafter sometimes referred to as a deployed state 1), the length of the tether belt 40 is such that the opening 28h of the airbag body 20 and the tether belt It is longer than the distance between the connecting portions at the other end of 40.
- the tether belt 40 is slack and the exhaust state switching member 30 can be changed to the exhaust state.
- the opening of the airbag body 20 is in the middle of being inflated and deployed larger than the deployed state 1.
- the distance between the connecting portions of the portion 28 h and the other end of the tether belt 40 is larger than the length of the tether belt 40.
- the tether belt 40 receives the inflating and deploying force and is pulled between a part of the inner periphery of the airbag body 20 and the exhaust state switching member 30 to draw the exhaust state switching member 30 into the airbag body 20. Switch to the non-exhaust state.
- the flap 50 is a flexible sheet-like member formed of cloth or the like, and is formed in a square shape here.
- the flap 50 may be a polygon other than a rectangle, a circle, or the like.
- the base end portion 51 (here, one side edge portion) of the flap 50 is connected to the outer peripheral portion of the airbag body 20 by sewing or the like. Further, the front end portion 52 of the flap 50 opposite to the base end portion 51 covers the airbag body 20 from the initial stage of inflation of the airbag body 20 toward the opposite side of the gas supply port 26h during the inflation. So as to extend.
- the base end portion 51 of the flap 50 includes a connecting portion between the tether belt 40 and the airbag body 20 in the airbag body 20, the exhaust state switching member 30, and the outer periphery when the airbag body 20 is viewed from the side. It is connected to the part between.
- tip part 52 of the flap 50 has the connection part of the tether belt 40 and the airbag main body 20 among the airbag main bodies 20 in the outer periphery which looked at the airbag main body 20 from the side. It extends to the (passenger side).
- the airbag head 20 when the airbag head 20 is inflated and deployed, if the head or chest of an occupant in a non-regular posture exists at a position above the occupant seat from above or above the inflator 12, the flap 50 is inflated and deployed. It is sandwiched between the bag body 20 and the occupant. As a result, a portion of the airbag body 20, in particular, a portion of the airbag body 20 between the connecting portion of the tether belt 40 and the exhaust state switching member 30 is extracted between the dashboard and the passenger in the non-regular posture. Can be suppressed.
- the airbag device 10 configured as described above is fixed to the dashboard 100 in front of the passenger seat of the vehicle via the bracket 102 and the like in a state of being assembled with the inflator 12. ing.
- the airbag main body 20 is accommodated in a folded form inside the dashboard 100.
- the folded form of the airbag body 20 may be a bellows shape, a roll shape, a crumpled state, or a combination thereof.
- the exhaust state switching member 30 is introduced into the airbag body 20.
- the exhaust state switching member 30 may be led out from the airbag body 20.
- the flap 50 is put on the outer periphery of the folded airbag body 20.
- the normal posture means that the occupant seat is adjusted to the assumed average use position and posture, and the average skeleton, height, and body occupant makes the torso lean against the backrest and the head axis. Is a vertical posture.
- a normal posture defined by European standards, Japanese standards, etc. may be adopted depending on the destination of the vehicle on which the airbag device 10 is mounted.
- a normal posture or a non-normal posture may be adopted in accordance with the change or new specification.
- FIG. 11 shows an initial state before the airbag body 20 is inflated and deployed.
- the gas generated by the inflator 12 is introduced into the airbag main body 20 through the gas supply port 26h when the vehicle collides.
- the airbag main body 20 attempts to inflate and deploy toward the upper side of the dashboard 100 and the passenger P1 (passenger seat) side by, for example, opening the airbag lid portion of the dashboard 100. To do.
- the flap 50 covers the airbag body 20 in the middle of inflation and deployment, and does not face the occupant P1 side. For this reason, the airbag main body 20 is inflated and deployed toward the passenger P1 as shown in FIG. At this time, the portion of the airbag body 20 where the exhaust state switching member 30 is provided and the connecting portion of the tether belt 40 are expanded and stretched, and the tether belt 40 is pulled. The exhaust state switching member 30 is pulled into the airbag body 20 by the tensile force of the tether belt 40 and switched to the non-exhaust state. For this reason, the airbag main body 20 is rapidly inflated and deployed in a state where the exhaust of the gas from the exhaust state switching member 30 is suppressed.
- the airbag main body 20 when the airbag main body 20 is inflated and deployed almost completely, the tether belt 40 is strongly pulled, and the exhaust state switching member 30 is strongly pulled into the airbag main body 20. The non-exhaust state is completely maintained against the internal pressure of the main body 20. Subsequently, the airbag body 20 receives a passenger seat occupant moving forward due to the impact of a vehicle collision, and absorbs the impact of the occupant.
- the non-regular posture refers to one of postures deviating from the normal posture and having a head closer to the dashboard 100 side than the normal posture. In this case, regardless of whether the occupant is an average skeleton, height, or body occupant, the skeleton is not in the normal position, and the average skeleton, height, and body are not. Including a case where an occupant (especially an infant) is seated in a sitting position.
- the non-regular posture in particular, a case where the head and the chest are positioned near the dashboard in front of the vehicle in a state where the passenger is seated in the passenger seat is assumed.
- an irregular posture defined by European standards, Japanese standards, etc. may be adopted.
- a normal posture or a non-normal posture may be adopted in accordance with the change or new specification.
- FIG. 15 shows an initial state before the airbag body 20 is inflated and deployed.
- the gas generated in the inflator 12 is introduced into the airbag main body 20 through the gas supply port 26h in the event of a vehicle collision or the like.
- the airbag body 20 attempts to inflate and deploy toward the upper side of the dashboard 100 and toward the occupant P2 occupant seat) by, for example, opening the airbag lid portion of the dashboard 100. . Since the head or chest of the occupant P2 is located near the dashboard 100, the airbag body 20 in the middle of inflation and deployment hits the occupant P2. At this time, the flap 50 covers over the airbag body 20 in the middle of inflation and deployment, and faces the occupant P2. For this reason, the flap 50 is pinched
- the airbag main body 20 Since the airbag main body 20 starts inflating and deploying from the folded state, the airbag main body 20 remains in a state of being folded to some extent in the middle of the inflating and deploying.
- the flap 50 when the flap 50 is sandwiched between the airbag body 20 and the occupant P2 in the middle of inflating and deploying, the force to inflate and deploy is received by the flap 50 and the sandwiched portion.
- the expansion / deployment force hardly acts on the inner side of 50. For this reason, the portion of the airbag body 20 where the exhaust state switching member 30 is provided and the connecting portion of the tether belt 40 are difficult to extend, and the force that strongly pulls the tether belt 40 is difficult to act.
- the tether belt 40 is in a slack state, and the exhaust state switching member 30 is in an exhaust state.
- the exhaust state switching member 30 may be in the exhaust state in the initial state, or the exhaust state switching member 30 may go out of the airbag body 20 and switch to the exhaust state by the internal pressure of the airbag body 20. May be.
- the gas in the airbag main body 20 passes through the exhaust state switching member 30 through the opening 28h and is exhausted to the outside from the first vent hole 32h. Expansion and expansion are suppressed.
- the airbag main body 20 is inflated and deployed by the same operation as that shown in FIGS. 15 to 17 except that the head of the occupant P3 is assumed to be above the occupant P2.
- FIGS. 21 to 23 show the operation of the airbag main body 20 when the flap 50 is omitted in the same case as shown in FIGS.
- the airbag body 20 attempts to inflate and deploy toward the upper side of the dashboard 100 and toward the occupant P3 occupant seat) by, for example, opening the airbag lid portion of the dashboard 100. To do. Since the head or chest of the occupant P3 is located near the dashboard 100, the airbag body 20 in the middle of inflation and deployment hits the occupant P3. Then, since the airbag main body 20 is prevented from being inflated and deployed to the occupant P3 side, the airbag body 20 is inflated and deployed to escape the space between the dashboard 100 and the occupant P3.
- the airbag main body 20 continues to be inflated and deployed in a state where the exhaust of gas is suppressed.
- the airbag device 10 configured as described above, when the airbag main body 20 is inflated and deployed with respect to an occupant in a non-regular posture, when the flap 50 comes into contact with the occupant, in the vicinity of that portion. Expansion of the airbag body 20 is suppressed. Thereby, the tension
- the airbag main body 20 when the airbag main body 20 is inflated and deployed, not only the vicinity of the connecting portion of the tether belt 40 in the airbag main body 20 contacts an occupant in an irregular posture, but also the flap 50 in the airbag main body 20 is covered.
- the flap 50 is configured such that the base end portion 51 is connected to the outer peripheral portion of the airbag main body 20 and the front end portion 52 covers the airbag main body 20 facing away from the gas supply port 26h. It only has to extend to.
- the flap 50 is sandwiched between the airbag body 20 and an occupant in a non-regular posture while the airbag body 20 is inflated and deployed, thereby suppressing partial inflation and deployment of the airbag body 20.
- the connecting portion of the tether belt 40 in the airbag body 20 has a role of preventing the dashboard and the passenger in the non-regular posture from being pulled out.
- the flap 50 includes the gas supply port 26h in the airbag body 20.
- the flap 50 is not sandwiched between the airbag body 20 and the occupant. From this point, when the airbag main body 20 is inflated and deployed, the front end 52 of the flap 50 is sandwiched between the non-regular posture occupant and the airbag main body 20, and the normal posture occupant and the airbag main body are sandwiched between them. It is preferable to extend so as not to be sandwiched between the two.
- the connecting portion of the tether belt 40 with respect to the airbag main body 20 is usually set at a position where it contacts a typical non-regular occupant.
- the flap 50 is: It is preferable to cover the connection portion of the tether belt 40 to the airbag body 20. From this point, it is preferable that the front end portion 52 of the flap 50 extends so as to exceed the position where the tether belt 40 is connected to the airbag body 20.
- the flap 50 directly suppresses the extension of the portion. It is preferable to be provided. From this point, it is preferable that the base end portion 51 of the flap 50 is closer to the gas supply port 26 h than the position where the tether belt 40 is connected to the airbag body 20.
- the proximal end portion 51 of the flap 50 is closer to the gas supply port 26 h than the position where the tether belt 40 is connected to the airbag body 20, and the distal end portion 52 of the flap 50 is connected to the airbag body 20.
- the tether belt 40 extends beyond the connected position, the tether belt 40 is more effectively pulled, the exhaust state switching member 30 is switched to or maintained in the non-exhaust state, and the airbag body 20 It is thought that sudden expansion and deployment of
- the positions of the opening 28h and the exhaust state switching member 30 and the connection destination of the tether belt 40 are not limited to the above examples.
- the opening 28 h and the exhaust state switching member 30 may be provided on both sides or one side of the airbag body 20.
- the connection destination of the tether belt in these cases may be the side portion of the airbag body 20 or the upper portion of the airbag body 20 in the same manner as described above.
- the example of the airbag main body to which the flap is attached is not limited to the above example, and may be any airbag main body that is inflated and deployed so as to form one air chamber in front of the occupant. Further, the flap may be connected to any part of the entire outer peripheral portion of the airbag main body and cover the flap from the connection part toward the opposite side of the gas supply port.
- the airbag main body 120 includes, in its inflated and deployed state, a left contact portion 121L that receives at least part of the shoulder portion of the occupant and the left half of the chest, and the shoulder portion of the occupant.
- the right abutting portion R is adjacent in the width direction via the vertical boundary portion 126 in a state where the right abutting portion R is recessed more than them, the left abutting portion 121L and the right abutting portion 121R, and the head abutting portion 122, It may be adjacent in the up-down direction via the width direction boundary portion 127 in a state of being recessed more than those.
- a flap 150 may be provided on the airbag main body 120 as described above.
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Abstract
The purpose of the present invention is to make it possible to inhibit sudden deployment of a main airbag unit when a passenger is out of position, with minimal dependence on the passenger's position and orientation. This airbag device is provided with the following: a main airbag unit that has a gas-supply port; an inflator; a venting-state switching member that is provided on the main airbag unit and, by being pulled inside the main airbag unit, can switch from an venting state in which gas inside the main airbag unit can be vented to a no-venting state in which the venting of gas from inside the main airbag unit is prevented; and a tether belt, which is one example of an attachment member that attaches the venting-state switching member to part of the inside surface of the main airbag unit. This airbag device is further provided with a flap, the base end of which is attached to the outside surface of the main airbag unit and the tip of which points away from the gas-supply port and extends over the main airbag unit.
Description
この発明は、車両乗員を保護するためのエアバッグ装置に関する。
The present invention relates to an airbag device for protecting a vehicle occupant.
従来、この種のエアバッグ装置として、特許文献1に開示のものがある。特許文献1では、エアバッグ本体の開口部に、非排気状態と排気状態との間で状態変更自在とされた排気状態切替部材が取付けられる。エアバッグ本体の内周部の一部と排気状態切替部材とがテザーベルトを介して連結されている。エアバッグ本体の正規形状膨張展開状態では、テザーベルトは排気状態切替部材をエアバッグ本体内に導入するように引込む。これにより、前記開口部からのガス排気が抑制され、エアバッグが迅速に膨張展開する。一方、乗員が通常の乗車姿勢よりも前傾した姿勢等、非正規な姿勢をとっている場合(Out Of Position、以下”OOP”という場合がある)には、エアバッグ本体は、上記正規形状膨張展開状態よりも縮んだ形状となり、テザーベルトの引張り量は上記状態よりも小さくなる。このため、ガスが上記開口部から排気され、エアバッグ本体の急な膨張展開が抑制されるようになっている。
Conventionally, as this type of airbag device, there is one disclosed in Patent Document 1. In Patent Document 1, an exhaust state switching member that is freely changeable between a non-exhaust state and an exhaust state is attached to the opening of the airbag body. A part of the inner peripheral portion of the airbag body and the exhaust state switching member are connected via a tether belt. In the normal shape inflated and deployed state of the airbag body, the tether belt is retracted so as to introduce the exhaust state switching member into the airbag body. Thus, gas exhaust from the opening is suppressed, and the airbag is rapidly inflated and deployed. On the other hand, when the occupant is taking an irregular posture such as a posture leaning forward from the normal riding posture (Out Of Position, hereinafter sometimes referred to as “OOP”), the airbag body has the above-mentioned regular shape. The shape is contracted more than the expanded state, and the tension amount of the tether belt is smaller than the above state. For this reason, gas is exhausted from the said opening part, and the rapid expansion | deployment of an airbag main body is suppressed.
しかしながら、非正規姿勢時における乗員の位置、姿勢によっては、テザーベルトの引張り量が大きくなり、開口部から十分なガス排気が行われない恐れがある。
However, depending on the position and posture of the occupant in the non-regular posture, the tension amount of the tether belt becomes large, and there is a possibility that sufficient gas exhaust is not performed from the opening.
そこで、本発明は、非正規姿勢時に、なるべく乗員の位置、姿勢に拘らず、エアバッグ本体の急な膨張展開を抑制できるようにすることを目的とする。
Therefore, an object of the present invention is to make it possible to suppress rapid inflation and deployment of an airbag body regardless of the position and posture of an occupant as much as possible during an irregular posture.
上記課題を解決するため、第1の態様に係るエアバッグ装置は、ガス供給口を有するエアバッグ本体と、前記ガス供給口を通じて前記エアバッグ本体内にガスを供給するインフレータと、前記エアバッグ本体に設けられ、前記エアバッグ本体内に引込まれることで、前記エアバッグ本体内のガスを排気可能にする排気状態から前記エアバッグ本体内のガスの排気を抑制する非排気状態に切替えられる排気状態切替部材と、前記排気状態切替部材と前記エアバッグ本体の内周部の一部とを連結する連結部材と、基端部が前記エアバッグ本体の外周部に連結されると共に、先端部が前記ガス供給口とは反対側に向けて前記エアバッグ本体に覆い被さるように延在するフラップとを備える。
In order to solve the above problem, an airbag device according to a first aspect includes an airbag main body having a gas supply port, an inflator for supplying gas into the airbag main body through the gas supply port, and the airbag main body. Exhaust gas that is provided in the air bag body and that is drawn into the air bag body so that the gas in the air bag body can be exhausted is switched to a non-exhaust state that suppresses the exhaust of gas in the air bag body A state switching member, a connecting member that connects the exhaust state switching member and a part of the inner peripheral portion of the airbag body, a proximal end portion connected to the outer peripheral portion of the airbag body, and a distal end portion A flap extending toward the opposite side of the gas supply port so as to cover the airbag body.
第2の態様は、第1の態様に係るエアバッグ装置であって、前記フラップは、前記エアバッグ本体のうち、前記ガス供給口の縁部から前記エアバッグ本体が膨張展開する際に正規姿勢の乗員に当接する部分の手前の領域の少なくとも一部に覆い被さるように設けられている。
A 2nd aspect is an airbag apparatus which concerns on a 1st aspect, Comprising: The said flap is a normal attitude | position when the said airbag main body inflate-deploys from the edge part of the said gas supply port among the said airbag main bodies. It is provided so as to cover at least a part of a region in front of the portion that contacts the passenger.
第3の態様は、第1又は第2の態様に係るエアバッグ装置であって、前記フラップの先端部は、前記エアバッグ本体が膨張展開する際に、非正規姿勢の乗員と前記エアバッグ本体との間には挟まれ、正規姿勢の乗員と前記エアバッグ本体との間には挟まれないように延在している。
A third aspect is the airbag device according to the first or second aspect, wherein the front end portion of the flap includes an occupant in an irregular posture and the airbag body when the airbag body is inflated and deployed. Between the passenger and the airbag body so as not to be sandwiched between the airbag body and the airbag body.
第4の態様は、第1~第3のいずれか1つの態様に係るエアバッグ装置であって、前記フラップの先端部は、前記エアバッグ本体に対して前記連結部材が連結された位置を越えるように延在している。
A fourth aspect is the airbag device according to any one of the first to third aspects, wherein a tip portion of the flap exceeds a position where the connecting member is connected to the airbag body. So as to extend.
第5の態様は、第1~第4のいずれか1つの態様に係るエアバッグ装置であって、前記フラップの基端部は、前記ガス供給口の周縁部より離れた位置で前記エアバッグ本体の外周部に連結されている。
A fifth aspect is the airbag device according to any one of the first to fourth aspects, wherein a base end portion of the flap is located away from a peripheral edge portion of the gas supply port. It is connected with the outer periphery.
第6の態様は、第1~第5のいずれか1つの態様に係るエアバッグ装置であって、前記フラップの基端部は、前記エアバッグ本体に対して前記連結部材が連結された位置よりも前記ガス供給口側で、前記エアバッグ本体の外周部に連結されている。
A sixth aspect is the airbag device according to any one of the first to fifth aspects, wherein a base end portion of the flap is from a position where the connecting member is connected to the airbag body. Is also connected to the outer periphery of the airbag body on the gas supply port side.
第1の態様に係るエアバッグ装置によると、非正規姿勢時にエアバッグ本体が膨張展開しようとする際に、フラップが乗員に当接すると、その部分でエアバッグ本体の膨張が抑制される。エアバッグ本体の部分的な膨張を抑制することで、連結部材の引張りを抑制して、排気状態切替部材が非排気状態に切替え又は維持されることを抑制できる。これにより、非正規姿勢時に、なるべく乗員の位置、姿勢に拘らず、エアバッグ本体の急な膨張展開を抑制できる。
According to the airbag device according to the first aspect, when the airbag main body is inflated and deployed in a non-regular posture and the flap comes into contact with the occupant, the inflation of the airbag main body is suppressed at that portion. By suppressing the partial expansion of the airbag body, it is possible to suppress the pulling of the connecting member and to suppress the exhaust state switching member from being switched to or maintained in the non-exhaust state. As a result, during the non-regular posture, it is possible to suppress the rapid inflation and deployment of the airbag body regardless of the position and posture of the occupant as much as possible.
また、非正規姿勢時において、乗員は、前記エアバッグ本体のうち、前記ガス供給口の縁部から前記エアバッグ本体が膨張展開する際に正規姿勢の乗員に当接する部分の手前の領域の少なくとも一部に当接することが多いと想定される。そこで、第2の態様のように、前記領域の少なくとも一部にフラップを設けることで、当該配設領域でのエアバッグ本体の部分的な膨張展開を抑制できる。これにより、連結部材の引張りを抑制して、排気状態切替部材が非排気状態に切替え又は維持されることを抑制でき、非正規姿勢時に、なるべく乗員の位置、姿勢に拘らず、エアバッグ本体の急な膨張展開を抑制できる。
Further, in the non-regular posture, the occupant is at least in a region of the airbag main body in front of a portion that comes into contact with the occupant in the normal posture from the edge of the gas supply port when the airbag main body is inflated and deployed. It is assumed that it often contacts a part. Therefore, as in the second aspect, by providing a flap in at least a part of the region, partial inflation and deployment of the airbag main body in the arrangement region can be suppressed. As a result, the pulling of the connecting member can be suppressed, and the exhaust state switching member can be prevented from being switched to or maintained in the non-exhaust state. Sudden expansion and expansion can be suppressed.
第3の態様によると、非正規姿勢時には、フラップの先端部が乗員とエアバッグ本体との間に挟まれ、エアバッグ本体のうちフラップで覆われる部分で膨張展開が抑制される。これにより、連結部材の引張り及び排気状態切替部材の非排気状態への切替え又は維持が抑制され、エアバッグ本体の急な膨張展開を抑制できる。また、正規姿勢時には、フラップの先端部は乗員とエアバッグ本体との間に挟まれないで、エアバッグ本体が膨張展開する。これにより、連結部材が引張られると共に、排気状態切替部材が非排気状態に切替え又は維持され、エアバッグ本体を迅速に膨張展開できる。
According to the third aspect, at the time of the non-regular posture, the front end of the flap is sandwiched between the occupant and the airbag body, and the inflation and deployment is suppressed at the portion of the airbag body covered with the flap. Thereby, the pulling of the connecting member and the switching or maintenance of the exhaust state switching member to the non-exhaust state are suppressed, and the rapid inflation and deployment of the airbag body can be suppressed. Further, in the normal posture, the front end of the flap is not sandwiched between the occupant and the airbag body, and the airbag body is inflated and deployed. As a result, the connecting member is pulled, and the exhaust state switching member is switched or maintained in the non-exhaust state, so that the airbag body can be quickly inflated and deployed.
第4の態様によると、前記フラップの先端部は、前記エアバッグ本体に対して前記連結部材が連結された位置を越えるように延在しているため、連結部材の連結位置近傍でエアバッグ本体の部分的な膨張展開を抑制でき、これにより、連結部材の引張り及び排気状態切替部材の非排気状態への切替え又は維持が抑制され、エアバッグ本体の急な膨張展開を抑制できる。
According to the fourth aspect, the front end of the flap extends beyond the position where the connecting member is connected to the airbag main body, so that the airbag main body is near the connecting position of the connecting member. Therefore, the pulling of the connecting member and the switching or maintaining of the exhaust state switching member to the non-exhaust state are suppressed, and the rapid expansion and deployment of the airbag body can be suppressed.
第5の態様によると、エアバッグ本体のうちガス供給口の近傍部分を円滑に膨張させることができる。
According to the fifth aspect, the vicinity of the gas supply port in the airbag body can be inflated smoothly.
第6の態様によると、非正規姿勢時には、エアバッグ本体のうち連結部材が連結された位置よりもガス供給口側の部分の膨張展開を抑制できるため、より効果的に連結部材の引張りを抑制できる。これにより、排気状態切替部材の非排気状態への切替え又は維持、さらには、エアバッグ本体の急な膨張展開を抑制できる。
According to the sixth aspect, at the time of the non-regular posture, the expansion and deployment of the portion on the gas supply port side of the airbag body can be suppressed more than the position where the connection member is connected. it can. As a result, the exhaust state switching member can be switched to or maintained in the non-exhaust state, and further, rapid inflation and deployment of the airbag body can be suppressed.
以下、実施形態に係るエアバッグ装置について説明する。図1はエアバッグ装置10の膨張展開完了後の状態を示す図であり、図2及び図3は非排気状態にある排気状態切替部材を示す図であり、図4~図6は排気状態にある排気状態切替部材を示す図である。
Hereinafter, the airbag apparatus according to the embodiment will be described. FIG. 1 is a view showing a state after the inflation and deployment of the airbag device 10 is completed, FIGS. 2 and 3 are views showing an exhaust state switching member in a non-exhaust state, and FIGS. 4 to 6 are in an exhaust state. It is a figure which shows a certain exhaustion state switching member.
このエアバッグ装置10は、車両の助手席前方にあるダッシュボードに組込まれ、車両の衝突時等に助手席乗員前方に展開して、助手席乗員を受止めて衝撃を吸収する装置である。もちろん、本エアバッグ装置は、助手席用のエアバッグ装置に限らず、ステアリング装置に組込まれる運転席用のエアバッグ等にも適用可能である。
The airbag device 10 is a device that is incorporated in a dashboard in front of the passenger seat of the vehicle, deploys in front of the passenger in the passenger's seat, and absorbs the impact by receiving the passenger in the passenger seat. Of course, the airbag apparatus is not limited to the airbag apparatus for the passenger seat, but can be applied to an airbag for a driver's seat incorporated in a steering apparatus.
本エアバッグ装置10は、エアバッグ本体20と、インフレータ12と、排気状態切替部材30と、連結部材としてのテザーベルト40と、フラップ50とを備えている。
The airbag device 10 includes an airbag body 20, an inflator 12, an exhaust state switching member 30, a tether belt 40 as a connecting member, and a flap 50.
エアバッグ本体20は、膨張展開可能な袋状に形成されており、ガス供給口26hと、すくなくとも一つの開口部28hを有している。エアバッグ本体20は、例えば、次の構成によって袋状に形成される。すなわち、略帯状の布の両端縁部を縫い合せる等して接合することで略筒状の基布部22を形成する。また、基布部22の側方開口を閉塞可能な広がり形状を有する一対の側布部24を準備し、略筒状に形成された基布部22の両側開口周縁部に、それぞれ側布部24の縁部を縫いつける等して接合する。これにより、袋状のエアバッグ本体20が形成されている。ここでは、エアバッグ本体20は、側面視において、インフレータ12の上方から乗員側(車両後方、図1の右側)に向けて膨らみ、乗員側部分で下方に向けて膨らむ形状に形成されている。もちろん、エアバッグ本体20を袋状に形成するための基布の形状、組合わせは上記例に限られない。
The airbag body 20 is formed in a bag shape that can be inflated and deployed, and has a gas supply port 26h and at least one opening 28h. The airbag main body 20 is formed into a bag shape by the following configuration, for example. That is, the substantially cylindrical base fabric portion 22 is formed by joining the both edge portions of the substantially strip-shaped cloth by sewing or the like. Also, a pair of side cloth portions 24 having a widened shape capable of closing the side openings of the base cloth portion 22 are prepared, and the side cloth portions are respectively provided on the peripheral edge portions of the both side openings of the base cloth portion 22 formed in a substantially cylindrical shape. 24 edges are joined together by sewing. Thereby, the bag-shaped airbag main body 20 is formed. Here, the airbag main body 20 is formed in a shape inflating from the upper side of the inflator 12 toward the occupant side (the rear side of the vehicle, the right side in FIG. 1) and inflating downward at the occupant side portion in a side view. Of course, the shape and combination of the base fabric for forming the airbag body 20 in a bag shape are not limited to the above examples.
ガス供給口26hは、基布部22の一側部、ここでは、膨張展開形態でダッシュボードに対向する部分に形成されている。このガス供給口26h部分にインフレータ12が取付けられる。そして、車両の衝突時等にインフレータ12で発生したガスがガス供給口26hを通ってエアバッグ本体20内に導入される構成となっている。
The gas supply port 26h is formed at one side portion of the base fabric portion 22, here, at a portion facing the dashboard in an expanded and deployed form. The inflator 12 is attached to the gas supply port 26h. The gas generated in the inflator 12 at the time of a vehicle collision or the like is introduced into the airbag body 20 through the gas supply port 26h.
開口部28hは、ガス排出用の孔である。ここでは、開口部28hは、基布部22の一側部、ここでは、展開形態でガス供給口26hの斜め上方の位置(フロントウインドウと対向する位置)に形成されている。また、ここでは、開口部28hは、エアバッグ本体20の幅方向に沿って延びる長孔状に形成されている。もっとも、開口部28hは、長孔状に限られず、円穴状、多角形孔状に形成されていてもよい。
The opening 28h is a gas discharge hole. Here, the opening portion 28h is formed at one side of the base fabric portion 22, here, at a position obliquely above the gas supply port 26h (a position facing the front window) in a developed form. Further, here, the opening 28 h is formed in a long hole shape extending along the width direction of the airbag body 20. However, the opening 28h is not limited to a long hole shape, and may be formed in a circular hole shape or a polygonal hole shape.
なお、上記エアバッグ本体20に、開口部28hとは別に、第2のベントホールが形成されていてもよい。この第2のベントホールは、例えば、展開形態におけるエアバッグ本体20の両側部等に形成される。この第2のベントホールによる排気と、排気状態切替部材30を介した排気態様との組合わせによって、多彩な排気パターンの設定が可能となる。
In addition, the 2nd vent hole may be formed in the said airbag main body 20 separately from the opening part 28h. The second vent hole is formed, for example, on both sides of the airbag body 20 in the deployed form. Various exhaust patterns can be set by combining the exhaust through the second vent hole and the exhaust mode via the exhaust state switching member 30.
排気状態切替部材30は、上記開口部28hに設けられており、エアバッグ本体20内に引込まれる前の状態では、エアバッグ本体20内のガスを排気可能な排気状態とされ(図4~図6参照)、エアバッグ本体20内に引込まれることで、前記排気状態からエアバッグ本体20内のガスの排気を抑制する非排気状態(図1~図3参照)に切替えられるように構成されている。そして、後述するテザーベルト40による引込力に応じて、排気状態切替部材30がこれらの両状態間で状態変更する。
The exhaust state switching member 30 is provided in the opening 28h, and is in an exhaust state in which the gas in the airbag body 20 can be exhausted before being drawn into the airbag body 20 (FIG. 4 to FIG. 4). 6), by being pulled into the airbag body 20, the exhaust state is switched to a non-exhaust state (see FIGS. 1 to 3) that suppresses the exhaust of gas in the airbag body 20. Has been. Then, the exhaust state switching member 30 changes the state between these two states in accordance with the pulling force by the tether belt 40 described later.
より具体的に説明すると、排気状態切替部材30は、一対の帯状布32を有している。一対の帯状布32の一端部(基端部)は、エアバッグ本体20内で開口部28hの周縁部を囲むように縫いつけられている。なお、排気状態切替部材30は、エアバッグ本体20の外面で該エアバッグ本体20に縫いつけられていてもよい。また、一対の帯状布32の他端部(先端部)は、その幅方向に沿って略全体に亘って互いに縫い合されて接合されている。さらに、一対の帯状布32の両側部は、その基端部だけ縫い合されて接合されており、その他の部分は縫い合されない開口状態となっている。そして、一対の帯状布32の両側部のうち非縫い合せ部分で囲まれる部分をもって、第1のベントホール32hが構成されている。なお、一対の帯状布32の両側部の基端は所定長に亘って縫い合されているため、開口部28hと第1のベントホール32hとは連続した位置関係にはなく、互いに離れた位置に形成されていることになる。
More specifically, the exhaust state switching member 30 has a pair of belt-like cloths 32. One end portions (base end portions) of the pair of belt-like cloths 32 are sewn so as to surround the peripheral edge portion of the opening 28 h in the airbag body 20. The exhaust state switching member 30 may be sewn to the airbag body 20 on the outer surface of the airbag body 20. Further, the other end portions (tip portions) of the pair of belt-like cloths 32 are stitched together and joined substantially over the entire width direction. Further, both side portions of the pair of belt-like cloths 32 are stitched and joined only at their base ends, and the other portions are in an open state where they are not stitched. And the 1st vent hole 32h is comprised by the part enclosed by the non-sewn part among the both sides of a pair of strip | belt-shaped cloth 32. As shown in FIG. In addition, since the base end of the both sides of a pair of strip | belt-shaped cloth 32 is stitched over predetermined length, the opening part 28h and the 1st vent hole 32h are not in the continuous positional relationship, but are mutually separated positions. Will be formed.
また、一対の帯状布32の幅寸法は、上記開口部28hの幅寸法よりも大きく設定されており、従って、排気状態切替部材30の幅寸法も開口部28hの幅寸法よりも大きく設定されている。そして、エアバッグ本体20の内部から外部へ又はその逆に移動する場合には、排気状態切替部材30がその幅方向に縮小するように変形しつつ開口部28h内をくぐり抜けるようになり、所定の抵抗が作用するようになっている。これにより、後述するテザーベルト40による引込力やエアバッグ本体20に所定以上の内圧が作用していない場合等に、排気状態切替部材30が不用意に状態変更することを抑制するようにしている。
Further, the width dimension of the pair of belt-like cloths 32 is set larger than the width dimension of the opening 28h, and therefore the width dimension of the exhaust state switching member 30 is also set larger than the width dimension of the opening 28h. Yes. When the airbag main body 20 moves from the inside to the outside or vice versa, the exhaust state switching member 30 can pass through the opening 28h while being deformed so as to shrink in the width direction. Resistor is acting. Thus, the exhaust state switching member 30 is prevented from being inadvertently changed when, for example, a pull-in force by a tether belt 40, which will be described later, or an internal pressure exceeding a predetermined value is not applied to the airbag body 20.
この排気状態切替部材30は、第1のベントホール32h形成部分と共にエアバッグ本体20外に導出された状態では、第1のベントホール32hを通じてエアバッグ本体20内のガスを排気可能な排気状態となる(図4、図5及び図6参照)。一方、排気状態切替部材30は、第1のベントホール32h形成部分と共にエアバッグ本体20内に導入された状態では、開口部28hを閉塞するように覆ってエアバッグ本体20内のガス排気を抑制する非排気状態となる(図1、図2及び図3参照)。
When the exhaust state switching member 30 is led out of the airbag body 20 together with the first vent hole 32h forming portion, the exhaust state switching member 30 is in an exhaust state in which the gas in the airbag body 20 can be exhausted through the first vent hole 32h. (See FIGS. 4, 5, and 6). On the other hand, when the exhaust state switching member 30 is introduced into the airbag main body 20 together with the first vent hole 32h forming portion, the exhaust state switching member 30 covers the opening 28h so as to block the gas exhaust in the airbag main body 20. (See FIGS. 1, 2 and 3).
テザーベルト40は、上記排気状態切替部材30とエアバッグ本体20の内周部の一部とを連結する部材である。このテザーベルト40は、エアバッグ本体20が正規形状に膨張展開する際(図1参照)には、そのインフレータ12からのガス供給による膨張展開力を受けて排気状態切替部材30をエアバッグ本体20内に引込んで、非排気状態にする。一方、エアバッグ本体20が膨張展開する途中でエアバッグ本体20が非正規姿勢の乗員に当接し、エアバッグ本体20の展開膨張が部分的に妨げられると、テザーベルト40による排気状態切替部材30の引張りが抑制される。これにより、排気状態切替部材30が排気状態に変更するのを許容された状態となる。
The tether belt 40 is a member that connects the exhaust state switching member 30 and a part of the inner peripheral portion of the airbag body 20. When the airbag body 20 is inflated and deployed in a regular shape (see FIG. 1), the tether belt 40 receives the inflation and deployment force due to the gas supply from the inflator 12 to cause the exhaust state switching member 30 to move inside the airbag body 20. Into the non-exhaust state. On the other hand, when the airbag main body 20 comes into contact with an occupant in a non-regular posture while the airbag main body 20 is inflated and deployed, and the expansion and inflation of the airbag main body 20 is partially hindered, the exhaust state switching member 30 of the tether belt 40 Pulling is suppressed. As a result, the exhaust state switching member 30 is allowed to change to the exhaust state.
排気状態切替部材30の構成は上記例に限られない。
The configuration of the exhaust state switching member 30 is not limited to the above example.
例えば、図7に示す変形例に係る排気状態切替部材230では、一対の略台形状布232の長辺側である底辺232aをエアバッグ本体20の開口部28hに縫いつけて取付けると共に、一対の略台形状布232の短辺側である上辺232b同士を縫い合せて接合している。そして、その一対の略台形状布232の上辺の接合部分に長尺状のテザーベルト240の一端部を連結している。また、一対の略台形状布232の斜辺232cで囲まれる部分により一対の第1のベントホール232h(太線部分参照)を形成している。
For example, in the exhaust state switching member 230 according to the modification shown in FIG. 7, the bottom side 232a, which is the long side of the pair of substantially trapezoidal cloths 232, is sewn and attached to the opening 28h of the airbag body 20, and a pair of substantially The upper sides 232b, which are the short sides of the trapezoidal cloth 232, are sewn and joined together. Then, one end of the long tether belt 240 is connected to the joint portion of the upper side of the pair of substantially trapezoidal cloths 232. In addition, a pair of first vent holes 232 h (see thick line portions) are formed by the portions surrounded by the oblique sides 232 c of the pair of substantially trapezoidal cloths 232.
また、図8に示す変形例に係る排気状態切替部材330では、一対の略台形状布332の長辺側である底辺332aをエアバッグ本体20の開口部28hに縫いつけて取付けると共に、一対の略台形状布332の両斜辺332c同士を縫い合せて接合している。そして、その一対の略台形状布332の各上辺332bに長尺状のテザーベルト340の一端部を連結している。また、その一対の略台形状布332の上辺332bで囲まれる部分により、第1のベントホール332h(太線部分参照)を形成している。
Further, in the exhaust state switching member 330 according to the modified example shown in FIG. 8, the bottom side 332a which is the long side of the pair of substantially trapezoidal cloths 332 is attached to the opening 28h of the airbag body 20 by sewing. Both oblique sides 332c of the trapezoidal cloth 332 are stitched together and joined. Then, one end of a long tether belt 340 is connected to each upper side 332b of the pair of substantially trapezoidal cloths 332. In addition, a first vent hole 332h (refer to a thick line portion) is formed by a portion surrounded by the upper side 332b of the pair of substantially trapezoidal cloths 332.
図9に示す排気状態切替部材430では、一対の略台形状布432の長辺側である底辺432aをエアバッグ本体20の開口部28hに縫いつけて取付けると共に、一対の略台形状布432の両斜辺432c同士及び両上辺432b同士を縫い合せて接合している。そして、その一対の略台形状布432の各上辺に長尺状のテザーベルト440の一端部を連結している。また、その一対の略台形状布432の一方又は双方に穴を形成してこれを第1のベントホール432hとしている。
In the exhaust state switching member 430 shown in FIG. 9, the bottom side 432a which is the long side of the pair of substantially trapezoidal cloths 432 is sewn and attached to the opening 28h of the airbag body 20, and both the pair of substantially trapezoidal cloths 432 are attached. The oblique sides 432c and the upper sides 432b are sewn and joined. Then, one end of a long tether belt 440 is connected to each upper side of the pair of substantially trapezoidal cloths 432. Further, a hole is formed in one or both of the pair of substantially trapezoidal cloths 432, and this is used as a first vent hole 432h.
これらの各変形例の場合でも、上記実施形態と同様にエアバッグ本体20内に導入され、又は、外に導出されることで、非排気、排気の状態が切替えられる。
Even in the case of each of these modified examples, the state of non-exhaust and exhaust is switched by being introduced into the airbag body 20 or led out to the outside in the same manner as in the above embodiment.
より具体的には、テザーベルト40は、長尺部材、ここでは、布等によって細長い帯状に形成されている。
More specifically, the tether belt 40 is formed in an elongated band shape by a long member, here, cloth or the like.
テザーベルト40の一端部は、排気状態切替部材30の先端部に連結されている。ここでは、排気状態切替部材30の先端側両側部がテザーベルト40に連結されている。すなわち、テザーベルト40の一端部は、排気状態切替部材30の先端部と略同じ幅寸法に形成されている。ここでは、テザーベルト40の先端部52は、Y字状に広がる形状に形成されている。そして、その略Y字状に広がる両端部が、排気状態切替部材30の先端部の両側に縫いつけられている。これにより、テザーベルト40は、排気状態切替部材30の先端側両側部を引張るようにして、排気状態切替部材30をエアバッグ本体20内に引込むようになっている。もっとも、テザーベルト40の先端部が上記のようにY字状に広がる形状に形成されていることは必須ではない。
One end of the tether belt 40 is connected to the tip of the exhaust state switching member 30. Here, both end portions on the distal end side of the exhaust state switching member 30 are connected to the tether belt 40. That is, one end portion of the tether belt 40 is formed to have substantially the same width as the tip portion of the exhaust state switching member 30. Here, the tip 52 of the tether belt 40 is formed in a shape that spreads in a Y shape. Then, both end portions extending in a substantially Y shape are sewn on both sides of the distal end portion of the exhaust state switching member 30. As a result, the tether belt 40 pulls the exhaust state switching member 30 into the airbag body 20 so as to pull both end portions on the front end side of the exhaust state switching member 30. However, it is not essential that the tip portion of the tether belt 40 is formed in a Y-shaped shape as described above.
また、テザーベルト40の他端部は、エアバッグ本体20のうち正規姿勢の乗員とは通常当接しないで、非正規姿勢の乗員と当接する部分、即ち、エアバッグ本体20が膨張展開しようとする際に、ダッシュボードの直ぐ近傍に配設された頭部又は胸部に当接する部分の内周部に縫付ける等して連結されている。ここでは、テザーベルト40の他端部は、インフレータ12と対向する部分に取付けられている。通常、非正規姿勢の乗員の頭部或は胸部は、ダッシュボードの真上又は真上よりも乗員側の部分に存在することが推測される。このため、ダッシュボードに組付けられた状態におけるエアバッグ本体20の膨張展開形態において、テザーベルト40の他端部はダッシュボードの真上又は真上から乗員側に近づいた位置でエアバッグ本体20に連結されていることが好ましい。
Further, the other end portion of the tether belt 40 does not normally come into contact with an occupant in a normal posture of the airbag body 20, but the portion that comes into contact with an occupant in a non-regular posture, that is, the airbag body 20 tries to inflate and deploy. At this time, it is connected by sewing or the like to the inner peripheral portion of the portion that comes into contact with the head or chest disposed in the immediate vicinity of the dashboard. Here, the other end portion of the tether belt 40 is attached to a portion facing the inflator 12. Usually, it is estimated that the head or chest of an occupant in a non-regular posture is present on the occupant side above or just above the dashboard. For this reason, in the inflated and deployed form of the airbag main body 20 in the state assembled to the dashboard, the other end portion of the tether belt 40 is placed on the airbag main body 20 at a position close to the occupant side from directly above or directly above the dashboard. It is preferable that it is connected.
また、テザーベルト40の長さは、次の条件を満たす長さ寸法に設定されている。すなわち、エアバッグ本体20が正規形状に展開膨張する途中で、エアバッグ本体20(特に、テザーベルト40の連結部分近傍部位)が非正規姿勢の乗員の頭部或は胸部等に当接して排気状態切替部材30とテザーベルト40の連結部分間の膨張が部分的に妨げられた状態(以下展開状態1という場合がある)において、テザーベルト40の長さ寸法は、エアバッグ本体20の開口部28hとテザーベルト40の他端部の連結部分間の距離よりも長い。従って、この状態では、テザーベルト40は弛み、排気状態切替部材30が排気状態に変更できるようになる。一方、非正規姿勢の乗員によって膨張展開が妨げられないで、エアバッグ本体20が正規形状に展開膨張する際には、上記展開状態1よりも大きく膨張展開する途中で、エアバッグ本体20の開口部28hとテザーベルト40の他端部の連結部分間の距離は、テザーベルト40の長さ寸法よりも大きくなる。これにより、テザーベルト40は、膨張展開力を受けてエアバッグ本体20内周部の一部と排気状態切替部材30との間で引張られて排気状態切替部材30をエアバッグ本体20内に引込んで、非排気状態に切替える。
Also, the length of the tether belt 40 is set to a length dimension that satisfies the following conditions. That is, while the airbag body 20 is deployed and inflated into a regular shape, the airbag body 20 (particularly, a portion near the connecting portion of the tether belt 40) comes into contact with the head or chest of an occupant in an irregular position and is in an exhausted state. In a state where the expansion between the connecting portions of the switching member 30 and the tether belt 40 is partially hindered (hereinafter sometimes referred to as a deployed state 1), the length of the tether belt 40 is such that the opening 28h of the airbag body 20 and the tether belt It is longer than the distance between the connecting portions at the other end of 40. Therefore, in this state, the tether belt 40 is slack and the exhaust state switching member 30 can be changed to the exhaust state. On the other hand, when the airbag body 20 is deployed and inflated into a regular shape without being hindered by an occupant in a non-regular posture, the opening of the airbag body 20 is in the middle of being inflated and deployed larger than the deployed state 1. The distance between the connecting portions of the portion 28 h and the other end of the tether belt 40 is larger than the length of the tether belt 40. As a result, the tether belt 40 receives the inflating and deploying force and is pulled between a part of the inner periphery of the airbag body 20 and the exhaust state switching member 30 to draw the exhaust state switching member 30 into the airbag body 20. Switch to the non-exhaust state.
フラップ50は、布等で形成された柔軟なシート状部材であり、ここでは、方形状に形成されている。もっとも、フラップ50は、方形以外の多角形、円形等であってもよい。
The flap 50 is a flexible sheet-like member formed of cloth or the like, and is formed in a square shape here. However, the flap 50 may be a polygon other than a rectangle, a circle, or the like.
フラップ50の基端部51(ここでは、1つの側縁部)は、エアバッグ本体20の外周部に縫い合せ等によって連結されている。また、フラップ50のうち前記基端部51とは反対側の先端部52は、エアバッグ本体20の膨張初期から膨張途中においてガス供給口26hとは反対側に向けてエアバッグ本体20に覆い被さるように延在している。
The base end portion 51 (here, one side edge portion) of the flap 50 is connected to the outer peripheral portion of the airbag body 20 by sewing or the like. Further, the front end portion 52 of the flap 50 opposite to the base end portion 51 covers the airbag body 20 from the initial stage of inflation of the airbag body 20 toward the opposite side of the gas supply port 26h during the inflation. So as to extend.
ここでは、フラップ50の基端部51は、エアバッグ本体20を側方から視た外周りにおいて、エアバッグ本体20のうちテザーベルト40とエアバッグ本体20との連結部と排気状態切替部材30との間部分に連結されている。また、フラップ50の先端部52は、エアバッグ本体20を側方から視た外周りにおいて、エアバッグ本体20のうちテザーベルト40とエアバッグ本体20との連結部とをガス供給口26hの反対側(乗員側)に越えるように延在している。これにより、エアバッグ本体20が膨張展開する途中で、インフレータ12の上方或は上方から乗員席よりの位置に非正規姿勢の乗員の頭部又は胸部が存在すると、フラップ50が膨張展開途中のエアバッグ本体20と乗員との間に挟まれる。これにより、エアバッグ本体20の一部分、特に、エアバッグ本体20のうちテザーベルト40の連結部分と排気状態切替部材30との間部分が、ダッシュボードと非正規姿勢の乗員との間を抜出てしまうことを抑制できる。
Here, the base end portion 51 of the flap 50 includes a connecting portion between the tether belt 40 and the airbag body 20 in the airbag body 20, the exhaust state switching member 30, and the outer periphery when the airbag body 20 is viewed from the side. It is connected to the part between. Moreover, the front-end | tip part 52 of the flap 50 has the connection part of the tether belt 40 and the airbag main body 20 among the airbag main bodies 20 in the outer periphery which looked at the airbag main body 20 from the side. It extends to the (passenger side). As a result, when the airbag head 20 is inflated and deployed, if the head or chest of an occupant in a non-regular posture exists at a position above the occupant seat from above or above the inflator 12, the flap 50 is inflated and deployed. It is sandwiched between the bag body 20 and the occupant. As a result, a portion of the airbag body 20, in particular, a portion of the airbag body 20 between the connecting portion of the tether belt 40 and the exhaust state switching member 30 is extracted between the dashboard and the passenger in the non-regular posture. Can be suppressed.
このように構成されたエアバッグ装置10は、例えば、図10に示すように、インフレータ12と合体組付された状態で、ブラケット102等を介して車両の助手席前方のダッシュボード100に固定されている。この状態では、エアバッグ本体20は、ダッシュボード100内側に折畳まれた形態で収容されている。エアバッグ本体20の折畳み形態は、蛇腹状であってもよいし、ロール状であってもよいし、くしゃくしゃに丸めた状態であってもよいし、それらの複合であってもよい。この際、排気状態切替部材30は、エアバッグ本体20内に導入されている。もっとも、排気状態切替部材30は、エアバッグ本体20から導出されていてもよい。また、フラップ50は、折畳まれたエアバッグ本体20の外周に被せられている。
For example, as shown in FIG. 10, the airbag device 10 configured as described above is fixed to the dashboard 100 in front of the passenger seat of the vehicle via the bracket 102 and the like in a state of being assembled with the inflator 12. ing. In this state, the airbag main body 20 is accommodated in a folded form inside the dashboard 100. The folded form of the airbag body 20 may be a bellows shape, a roll shape, a crumpled state, or a combination thereof. At this time, the exhaust state switching member 30 is introduced into the airbag body 20. However, the exhaust state switching member 30 may be led out from the airbag body 20. The flap 50 is put on the outer periphery of the folded airbag body 20.
このエアバッグ装置10の膨張展開動作について説明する。
The inflating and deploying operation of the airbag device 10 will be described.
まず、図11~図14を参照して正規姿勢の乗員P1に対してエアバッグ本体20が膨張展開する動作について説明する。
First, the operation of inflating and deploying the airbag body 20 for the occupant P1 in the normal posture will be described with reference to FIGS.
なお、正規姿勢とは、乗員席を、想定される平均的な使用位置及び使用姿勢に調整し、平均的な骨格、身長及び体つきの乗員が、胴体を背もたれにもたれさせると共に、頭部の軸を鉛直姿勢にしたような姿勢をいう。
The normal posture means that the occupant seat is adjusted to the assumed average use position and posture, and the average skeleton, height, and body occupant makes the torso lean against the backrest and the head axis. Is a vertical posture.
かかる正規姿勢の一例は、2011年8月29日に発行され、2011年12月27日に有効となるFMVSS(Federal Motor Vehicle. Safety Standard)のNo.208の「S7.シートベルトアッセンブリ要件」及び「S10.テスト用ダミーの配置方法」等に規定されたものを採用することができる。
An example of such a normal posture is FMVSS (Federal Motor Vehicle Safety Standard) issued on August 29, 2011 and valid on December 27, 2011. Those defined in 208 “S7. Seat belt assembly requirements” and “S10. Method of placing test dummy” can be employed.
勿論、本エアバッグ装置10を搭載する車両の仕向地に応じて、ヨーロッパ向けの基準、日本向けの基準等で規定される正規姿勢を採用してもよい。また、基準が変更、或は新たに規定された場合には、当該変更、新たな規定にあわせて正規姿勢、非正規姿勢を採用してもよい。
Of course, depending on the destination of the vehicle on which the airbag device 10 is mounted, a normal posture defined by European standards, Japanese standards, etc. may be adopted. In addition, when the reference is changed or newly specified, a normal posture or a non-normal posture may be adopted in accordance with the change or new specification.
図11はエアバッグ本体20が膨張展開する前の初期状態を示している。図11に示す状態において、車両衝突時等には、インフレータ12で発生したガスがガス供給口26hを通ってエアバッグ本体20内に導入される。
FIG. 11 shows an initial state before the airbag body 20 is inflated and deployed. In the state shown in FIG. 11, the gas generated by the inflator 12 is introduced into the airbag main body 20 through the gas supply port 26h when the vehicle collides.
すると、図12に示すように、エアバッグ本体20はダッシュボード100のエアバッグ用リッド部分を割開く等して、ダッシュボード100の上方及び乗員P1(乗員席)側に向けて膨張展開しようとする。
Then, as shown in FIG. 12, the airbag main body 20 attempts to inflate and deploy toward the upper side of the dashboard 100 and the passenger P1 (passenger seat) side by, for example, opening the airbag lid portion of the dashboard 100. To do.
この際、フラップ50は、膨張展開途中のエアバッグ本体20の上方に覆い被さり、乗員P1側には面していない。このため、エアバッグ本体20は図13に示すように、乗員P1側に向けて膨張展開する。この際、エアバッグ本体20のうち排気状態切替部材30が設けられた部分とテザーベルト40の連結部分とが膨張して伸び、テザーベルト40が引張られる。テザーベルト40の引張り力によって、排気状態切替部材30がエアバッグ本体20内に引込まれ、非排気状態に切替えられる。このため、排気状態切替部材30からガスの排気が抑制された状態で、エアバッグ本体20が迅速に膨張展開する。
At this time, the flap 50 covers the airbag body 20 in the middle of inflation and deployment, and does not face the occupant P1 side. For this reason, the airbag main body 20 is inflated and deployed toward the passenger P1 as shown in FIG. At this time, the portion of the airbag body 20 where the exhaust state switching member 30 is provided and the connecting portion of the tether belt 40 are expanded and stretched, and the tether belt 40 is pulled. The exhaust state switching member 30 is pulled into the airbag body 20 by the tensile force of the tether belt 40 and switched to the non-exhaust state. For this reason, the airbag main body 20 is rapidly inflated and deployed in a state where the exhaust of the gas from the exhaust state switching member 30 is suppressed.
そして、図14に示すように、エアバッグ本体20がほぼ完全に膨張展開すると、テザーベルト40が強く引張られて、排気状態切替部材30はエアバッグ本体20内に強く引張られた状態となり、エアバッグ本体20の内圧に抗して上記非排気状態に完全に維持される。続いて、このエアバッグ本体20が車両衝突の衝撃によって前方に移動する助手席乗員を受止め、乗員の衝撃を吸収する。
Then, as shown in FIG. 14, when the airbag main body 20 is inflated and deployed almost completely, the tether belt 40 is strongly pulled, and the exhaust state switching member 30 is strongly pulled into the airbag main body 20. The non-exhaust state is completely maintained against the internal pressure of the main body 20. Subsequently, the airbag body 20 receives a passenger seat occupant moving forward due to the impact of a vehicle collision, and absorbs the impact of the occupant.
次に、非正規姿勢の乗員に対してエアバッグ本体20が膨張展開する動作について説明する。
Next, the operation of the airbag body 20 inflating and deploying to an occupant in an irregular position will be described.
なお、非正規姿勢とは、上記正規姿勢から外れた姿勢で、かつ、頭部が正規姿勢よりもダッシュボード100側に近い姿勢のうちの1つをいう。この場合、乗員が平均的な骨格、身長及び体つきから外れた乗員であるかどうかを問わず、正規姿勢から外れた姿勢で着座している場合、及び、平均的な骨格、身長及び体つきから外れた乗員(特に幼児)が着座姿勢を問わす着座している場合を含む。かかる非正規姿勢としては、特に、乗員が乗員席に着座した状態で頭部及び胸部を車両前方のダッシュボード近くに位置させている場合が想定される。
The non-regular posture refers to one of postures deviating from the normal posture and having a head closer to the dashboard 100 side than the normal posture. In this case, regardless of whether the occupant is an average skeleton, height, or body occupant, the skeleton is not in the normal position, and the average skeleton, height, and body are not. Including a case where an occupant (especially an infant) is seated in a sitting position. As the non-regular posture, in particular, a case where the head and the chest are positioned near the dashboard in front of the vehicle in a state where the passenger is seated in the passenger seat is assumed.
かかる非正規姿勢の一例は、2011年8月29日に発行され、2011年12月27日に有効となるFMVSS(Federal Motor Vehicle. Safety Standard)のNo.208の「S22.S21(3歳児ダミーを使う場合の要件)に関するテスト手順」に規定されたものを採用することができる。
An example of such a non-regular posture is FMVSS (Federal Motor Vehicle Safety Standard) issued on August 29, 2011 and effective December 27, 2011. 208 stipulated in “S22.S21 (Requirements for using a 3-year-old dummy)” can be adopted.
勿論、本エアバッグ装置10を搭載する車両の仕向地に応じて、ヨーロッパ向けの基準、日本向けの基準等で規定される非正規姿勢を採用してもよい。また、基準が変更、或は新たに規定された場合には、当該変更、新たな規定にあわせて正規姿勢、非正規姿勢を採用してもよい。
Of course, depending on the destination of the vehicle on which the airbag device 10 is mounted, an irregular posture defined by European standards, Japanese standards, etc. may be adopted. In addition, when the reference is changed or newly specified, a normal posture or a non-normal posture may be adopted in accordance with the change or new specification.
図15~図17を参照して、3歳児の乗員P2がダッシュボード100に近づけた非正規姿勢で着座している場合において、エアバッグ本体20が膨張展開する動作について説明する。
Referring to FIGS. 15 to 17, the operation of the airbag body 20 inflating and deploying when the 3-year-old occupant P2 is seated in an irregular posture close to the dashboard 100 will be described.
図15はエアバッグ本体20が膨張展開する前の初期状態を示している。図15に示す状態において、車両衝突時等には、インフレータ12で発生したガスがガス供給口26hを通ってエアバッグ本体20内に導入される。
FIG. 15 shows an initial state before the airbag body 20 is inflated and deployed. In the state shown in FIG. 15, the gas generated in the inflator 12 is introduced into the airbag main body 20 through the gas supply port 26h in the event of a vehicle collision or the like.
すると、図16に示すように、エアバッグ本体20はダッシュボード100のエアバッグ用リッド部分を割開く等して、ダッシュボード100の上方及び乗員P2乗員席)側に向けて膨張展開しようとする。乗員P2の頭部或は胸部はダッシュボード100近くに位置しているため、膨張展開途中のエアバッグ本体20が乗員P2に当る。この際、フラップ50は、膨張展開途中のエアバッグ本体20の上方に覆い被さり、乗員P2にも面する。このため、フラップ50は、膨張展開途中のエアバッグ本体20と乗員P2との間に挟まれる。エアバッグ本体20は折畳まれた状態から膨張展開を開始するため、膨張展開途中では、エアバッグ本体20は何らかの形態である程度折畳まれた状態が残っている。しかしながら、上記のように、フラップ50が膨張展開途中のエアバッグ本体20と乗員P2との間に挟まれると、膨張展開しようとする力がフラップ50及び前記挟込み部分によって受止められるため、フラップ50の内側には膨張展開力が作用し難い。このため、エアバッグ本体20のうち排気状態切替部材30が設けられた部分とテザーベルト40の連結部分とが伸び難くなり、テザーベルト40を強く引張る力が作用し難い。このため、テザーベルト40が弛んだ状態となり、排気状態切替部材30は排気状態となる。なお、排気状態切替部材30は、初期状態において排気状態であってもよいし、或は、エアバッグ本体20の内圧によって排気状態切替部材30がエアバッグ本体20外に出て排気状態に切替ってもよい。
Then, as shown in FIG. 16, the airbag body 20 attempts to inflate and deploy toward the upper side of the dashboard 100 and toward the occupant P2 occupant seat) by, for example, opening the airbag lid portion of the dashboard 100. . Since the head or chest of the occupant P2 is located near the dashboard 100, the airbag body 20 in the middle of inflation and deployment hits the occupant P2. At this time, the flap 50 covers over the airbag body 20 in the middle of inflation and deployment, and faces the occupant P2. For this reason, the flap 50 is pinched | interposed between the airbag main body 20 and the passenger | crew P2 in the middle of inflation deployment. Since the airbag main body 20 starts inflating and deploying from the folded state, the airbag main body 20 remains in a state of being folded to some extent in the middle of the inflating and deploying. However, as described above, when the flap 50 is sandwiched between the airbag body 20 and the occupant P2 in the middle of inflating and deploying, the force to inflate and deploy is received by the flap 50 and the sandwiched portion. The expansion / deployment force hardly acts on the inner side of 50. For this reason, the portion of the airbag body 20 where the exhaust state switching member 30 is provided and the connecting portion of the tether belt 40 are difficult to extend, and the force that strongly pulls the tether belt 40 is difficult to act. For this reason, the tether belt 40 is in a slack state, and the exhaust state switching member 30 is in an exhaust state. The exhaust state switching member 30 may be in the exhaust state in the initial state, or the exhaust state switching member 30 may go out of the airbag body 20 and switch to the exhaust state by the internal pressure of the airbag body 20. May be.
これにより、図17に示すように、エアバッグ本体20内のガスは開口部28hから排気状態切替部材30内を通って第1のベントホール32hから外部に排気され、エアバッグ本体20の急激な展開膨張が抑制される。
As a result, as shown in FIG. 17, the gas in the airbag main body 20 passes through the exhaust state switching member 30 through the opening 28h and is exhausted to the outside from the first vent hole 32h. Expansion and expansion are suppressed.
図18~図20を参照して、6歳児の乗員P3がダッシュボード100に近づけた非正規姿勢で着座している場合において、エアバッグ本体20が膨張展開する動作について説明する。
18 to 20, the operation of the airbag body 20 inflating and deploying when a 6-year-old occupant P3 is seated in an irregular posture close to the dashboard 100 will be described.
この場合、想定される乗員P3の頭部が上記乗員P2の場合よりも上方にある点を除いて、図15~図17に示す場合と同様の動作でエアバッグ本体20が膨張展開する。
In this case, the airbag main body 20 is inflated and deployed by the same operation as that shown in FIGS. 15 to 17 except that the head of the occupant P3 is assumed to be above the occupant P2.
このため、この場合にも、エアバッグ本体20の急激な展開膨張が抑制される。
Therefore, also in this case, the rapid deployment and inflation of the airbag body 20 is suppressed.
図21~図23は、図18~図20に示す場合と同様の場合であって、フラップ50を省略した場合のエアバッグ本体20の動作を示している。
FIGS. 21 to 23 show the operation of the airbag main body 20 when the flap 50 is omitted in the same case as shown in FIGS.
この場合、図21に示すように、エアバッグ本体20はダッシュボード100のエアバッグ用リッド部分を割開く等して、ダッシュボード100の上方及び乗員P3乗員席)側に向けて膨張展開しようとする。乗員P3の頭部或は胸部はダッシュボード100近くに位置しているため、膨張展開途中のエアバッグ本体20が乗員P3に当る。すると、エアバッグ本体20は、乗員P3側への膨張展開を妨げられるため、ダッシュボード100と乗員P3との間の空間を抜出て上方に逃げる膨張展開する。すると、上記の場合とは異なり、エアバッグ本体20のうち排気状態切替部材30が設けられた部分とテザーベルト40の連結部分とがダッシュボード100と乗員P3との間で伸びてしまうため、テザーベルト40を強く引張る力が作用する。このため、テザーベルト40が引張られ、排気状態切替部材30は非排気状態となる。
In this case, as shown in FIG. 21, the airbag body 20 attempts to inflate and deploy toward the upper side of the dashboard 100 and toward the occupant P3 occupant seat) by, for example, opening the airbag lid portion of the dashboard 100. To do. Since the head or chest of the occupant P3 is located near the dashboard 100, the airbag body 20 in the middle of inflation and deployment hits the occupant P3. Then, since the airbag main body 20 is prevented from being inflated and deployed to the occupant P3 side, the airbag body 20 is inflated and deployed to escape the space between the dashboard 100 and the occupant P3. Then, unlike the above case, the portion of the airbag body 20 where the exhaust state switching member 30 is provided and the connecting portion of the tether belt 40 extend between the dashboard 100 and the occupant P3, and therefore the tether belt 40 The force that pulls strongly acts. For this reason, the tether belt 40 is pulled, and the exhaust state switching member 30 enters a non-exhaust state.
これにより、図23に示すように、ガスの排気が抑制された状態でエアバッグ本体20が膨張展開を継続してしまう。
As a result, as shown in FIG. 23, the airbag main body 20 continues to be inflated and deployed in a state where the exhaust of gas is suppressed.
以上のように構成されたエアバッグ装置10によると、非正規姿勢状態の乗員に対してエアバッグ本体20が膨張展開しようとする際には、フラップ50が乗員に当接すると、その部分近傍でエアバッグ本体20の膨張が抑制される。これにより、テザーベルト40の引張りを抑制して、排気状態切替部材30が非排気状態に切替え又は維持されることを抑制できる。これにより、エアバッグ本体20の膨張展開時において、エアバッグ本体20のうちテザーベルト40の連結部分近傍が非正規姿勢の乗員に当接した場合だけでなく、エアバッグ本体20のうちフラップ50で覆われる部分が非正規姿勢の乗員に当接した場合にも、エアバッグ本体20の部分的な膨張展開を抑制できる。これにより、非正規姿勢時に、なるべく乗員の位置、姿勢に拘らず、エアバッグ本体20の急な膨張展開を抑制できる。
According to the airbag device 10 configured as described above, when the airbag main body 20 is inflated and deployed with respect to an occupant in a non-regular posture, when the flap 50 comes into contact with the occupant, in the vicinity of that portion. Expansion of the airbag body 20 is suppressed. Thereby, the tension | tensile_strength of the tether belt 40 can be suppressed and it can suppress that the exhaust state switching member 30 is switched or maintained to a non-exhaust state. Thus, when the airbag main body 20 is inflated and deployed, not only the vicinity of the connecting portion of the tether belt 40 in the airbag main body 20 contacts an occupant in an irregular posture, but also the flap 50 in the airbag main body 20 is covered. Even when the portion to be in contact with an occupant in a non-regular posture, partial inflation and deployment of the airbag body 20 can be suppressed. As a result, during the non-regular posture, it is possible to suppress the rapid inflation and deployment of the airbag body 20 regardless of the position and posture of the occupant as much as possible.
基本的には、フラップ50は、基端部51がエアバッグ本体20の外周部に連結されると共に、先端部52がガス供給口26hとは反対側に向けてエアバッグ本体20に覆い被さるように延在していればよい。
Basically, the flap 50 is configured such that the base end portion 51 is connected to the outer peripheral portion of the airbag main body 20 and the front end portion 52 covers the airbag main body 20 facing away from the gas supply port 26h. It only has to extend to.
もっとも、フラップ50は、エアバッグ本体20が膨張展開する途中でエアバッグ本体20と非正規姿勢の乗員との間に挟まれ、これにより、エアバッグ本体20の部分的な膨張展開を抑制して、エアバッグ本体20のうちテザーベルト40の連結部分がダッシュボードと非正規姿勢の乗員との間を抜出てしまうことを抑制する役割を有している。非正規姿勢として上記所定の正規姿勢以外の全ての姿勢を想定し、そのいずれかの非正規姿勢に対して上記効果を得るためには、フラップ50は、エアバッグ本体20のうちガス供給口26hの縁部からエアバッグ本体20が膨張展開する際に所定の正規姿勢の乗員に当接する部分の手前の領域の少なくとも一部に覆い被さるように設けられているとよいとも考えられる。
However, the flap 50 is sandwiched between the airbag body 20 and an occupant in a non-regular posture while the airbag body 20 is inflated and deployed, thereby suppressing partial inflation and deployment of the airbag body 20. The connecting portion of the tether belt 40 in the airbag body 20 has a role of preventing the dashboard and the passenger in the non-regular posture from being pulled out. To assume all postures other than the predetermined normal posture as the non-normal posture and obtain the above effect for any of the non-normal postures, the flap 50 includes the gas supply port 26h in the airbag body 20. When the airbag main body 20 is inflated and deployed from the edge of the airbag, it is considered to be provided so as to cover at least a part of a region in front of a portion that comes into contact with an occupant in a predetermined normal posture.
もっとも、乗員が正規姿勢である場合には、フラップ50がエアバッグ本体20と乗員との間には挟まれないようにすることが好ましい。この点からすると、フラップ50の先端部52は、エアバッグ本体20が膨張展開する際に、非正規姿勢の乗員とエアバッグ本体20との間には挟まれ、正規姿勢の乗員とエアバッグ本体20との間には挟まれない程度に延在していることが好ましい。
However, when the occupant is in a normal posture, it is preferable that the flap 50 is not sandwiched between the airbag body 20 and the occupant. From this point, when the airbag main body 20 is inflated and deployed, the front end 52 of the flap 50 is sandwiched between the non-regular posture occupant and the airbag main body 20, and the normal posture occupant and the airbag main body are sandwiched between them. It is preferable to extend so as not to be sandwiched between the two.
また、通常、エアバッグ本体20に対するテザーベルト40の連結部分は、典型的な非正規姿勢の乗員と当接する箇所に設定される。エアバッグ本体20が、上記典型的な非正規姿勢を中心としてずれた非正規姿勢の乗員に当接した場合に、エアバッグ本体20の急な膨張展開を抑制するためには、フラップ50は、エアバッグ本体20に対するテザーベルト40の連結部分を覆っていることが好ましい。この点からすると、フラップ50の先端部52は、エアバッグ本体20に対してテザーベルト40が連結された位置を越えるように延在していることが好ましい。
In addition, the connecting portion of the tether belt 40 with respect to the airbag main body 20 is usually set at a position where it contacts a typical non-regular occupant. In order to suppress rapid inflation and deployment of the airbag main body 20 when the airbag main body 20 comes into contact with an occupant in a non-regular posture that deviates from the typical non-normal posture, the flap 50 is: It is preferable to cover the connection portion of the tether belt 40 to the airbag body 20. From this point, it is preferable that the front end portion 52 of the flap 50 extends so as to exceed the position where the tether belt 40 is connected to the airbag body 20.
また、テザーベルト40は、エアバッグ本体20のうちテザーベルト40の連結部分と排気状態切替部材30との間の部分の伸び状態に応じて引張られるため、フラップ50は直接的に当該部分の伸びを抑制するように設けられることが好ましい。この点からすると、フラップ50の基端部51は、エアバッグ本体20に対してテザーベルト40が連結された位置よりもガス供給口26h側であることが好ましい。
Further, since the tether belt 40 is pulled according to the extension state of the portion of the airbag body 20 between the connecting portion of the tether belt 40 and the exhaust state switching member 30, the flap 50 directly suppresses the extension of the portion. It is preferable to be provided. From this point, it is preferable that the base end portion 51 of the flap 50 is closer to the gas supply port 26 h than the position where the tether belt 40 is connected to the airbag body 20.
特に、フラップ50の基端部51は、エアバッグ本体20に対してテザーベルト40が連結された位置よりもガス供給口26h側であり、フラップ50の先端部52は、エアバッグ本体20に対してテザーベルト40が連結された位置を越えるように延在している場合に、より効果的にテザーベルト40の引張り、排気状態切替部材30の非排気状態への切替え又は維持、さらには、エアバッグ本体20の急な膨張展開を抑制できると考えられる。
In particular, the proximal end portion 51 of the flap 50 is closer to the gas supply port 26 h than the position where the tether belt 40 is connected to the airbag body 20, and the distal end portion 52 of the flap 50 is connected to the airbag body 20. When the tether belt 40 extends beyond the connected position, the tether belt 40 is more effectively pulled, the exhaust state switching member 30 is switched to or maintained in the non-exhaust state, and the airbag body 20 It is thought that sudden expansion and deployment of
なお、上記実施形態において、開口部28h及び排気状態切替部材30の位置、テザーベルト40の連結先は上記例に限られない。例えば、エアバッグ本体20の両側部又は一方の側部に開口部28h及び排気状態切替部材30が設けられていてもよい。これらの場合のテザーベルトの連結先は、エアバッグ本体20の側部であってもよいし、上記と同様にエアバッグ本体20の上方部分であってもよい。
In the above embodiment, the positions of the opening 28h and the exhaust state switching member 30 and the connection destination of the tether belt 40 are not limited to the above examples. For example, the opening 28 h and the exhaust state switching member 30 may be provided on both sides or one side of the airbag body 20. The connection destination of the tether belt in these cases may be the side portion of the airbag body 20 or the upper portion of the airbag body 20 in the same manner as described above.
また、フラップの取付対象となるエアバッグ本体の例は上記例に限られず、乗員前方に一つの気室を形成するように膨張展開するエアバッグ本体であればよい。また、フラップは、そのようなエアバッグ本体の外周部全体のいずれかの箇所に連結され、その連結箇所からガス供給口の反対側に向けて覆い被さっていればよい。
Further, the example of the airbag main body to which the flap is attached is not limited to the above example, and may be any airbag main body that is inflated and deployed so as to form one air chamber in front of the occupant. Further, the flap may be connected to any part of the entire outer peripheral portion of the airbag main body and cover the flap from the connection part toward the opposite side of the gas supply port.
例えば、図24に示すように、エアバッグ本体120は、その膨張展開状態において、乗員の肩部及び胸部の左半側の少なくとも一部を受止める左側当接部121Lと、乗員の前記肩部及び前記胸部の右半側の少なくとも一部を受止める右側当接部121Rと、乗員の頭部の少なくとも一部を受止める頭部当接部122とを含んでおり、左側当接部121Lと右側当接部Rとがそれらよりも凹んだ状態の上下方向境界部126を介して幅方向に隣合い、左側当接部121L及び右側当接部121Rと、頭部当接部122とが、それらよりも凹んだ状態の幅方向境界部127を介して上下方向に隣合うものであってもよい。このようなエアバッグ本体120に対して、上記と同様にフラップ150が設けられていてもよい。
For example, as shown in FIG. 24, the airbag main body 120 includes, in its inflated and deployed state, a left contact portion 121L that receives at least part of the shoulder portion of the occupant and the left half of the chest, and the shoulder portion of the occupant. And a right contact part 121R that receives at least a part of the right half of the chest, and a head contact part 122 that receives at least a part of the head of the occupant, The right abutting portion R is adjacent in the width direction via the vertical boundary portion 126 in a state where the right abutting portion R is recessed more than them, the left abutting portion 121L and the right abutting portion 121R, and the head abutting portion 122, It may be adjacent in the up-down direction via the width direction boundary portion 127 in a state of being recessed more than those. A flap 150 may be provided on the airbag main body 120 as described above.
以上のようにこの発明は詳細に説明されたが、上記した説明は、すべての局面において、例示であって、この発明がそれに限定されるものではない。例示されていない無数の変形例が、この発明の範囲から外れることなく想定され得るものと解される。
Although the present invention has been described in detail as described above, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.
Claims (6)
- ガス供給口を有するエアバッグ本体と、
前記ガス供給口を通じて前記エアバッグ本体内にガスを供給するインフレータと、
前記エアバッグ本体に設けられ、前記エアバッグ本体内に引込まれることで、前記エアバッグ本体内のガスを排気可能にする排気状態から前記エアバッグ本体内のガスの排気を抑制する非排気状態に切替えられる排気状態切替部材と、
前記排気状態切替部材と前記エアバッグ本体の内周部の一部とを連結する連結部材と、
基端部が前記エアバッグ本体の外周部に連結されると共に、先端部が前記ガス供給口とは反対側に向けて前記エアバッグ本体に覆い被さるように延在するフラップと、
を備えるエアバッグ装置。 An airbag body having a gas supply port;
An inflator for supplying gas into the airbag body through the gas supply port;
A non-exhaust state that is provided in the airbag body and that suppresses the exhaust of the gas in the airbag body from an exhaust state that allows the gas in the airbag body to be exhausted by being drawn into the airbag body An exhaust state switching member that is switched to
A connecting member that connects the exhaust state switching member and a part of the inner periphery of the airbag body;
A flap that is connected to the outer peripheral portion of the airbag body and has a distal end portion that covers the airbag body toward the opposite side of the gas supply port;
An airbag device comprising: - 請求項1記載のエアバッグ装置であって、
前記フラップは、前記エアバッグ本体のうち、前記ガス供給口の縁部から前記エアバッグ本体が膨張展開する際に正規姿勢の乗員に当接する部分の手前の領域の少なくとも一部に覆い被さるように設けられている、エアバッグ装置。 The airbag device according to claim 1,
The flap covers at least a part of a region in front of a portion of the airbag main body that comes into contact with an occupant in a normal posture when the airbag main body is inflated and deployed from an edge of the gas supply port. An airbag device is provided. - 請求項1又は請求項2記載のエアバッグ装置であって、
前記フラップの先端部は、前記エアバッグ本体が膨張展開する際に、非正規姿勢の乗員と前記エアバッグ本体との間には挟まれ、正規姿勢の乗員と前記エアバッグ本体との間には挟まれないように延在している、エアバッグ装置。 The airbag device according to claim 1 or 2,
When the airbag main body is inflated and deployed, the front end of the flap is sandwiched between the non-regular posture occupant and the airbag main body, and between the normal posture occupant and the airbag main body. An airbag device extending so as not to be pinched. - 請求項1~請求項3のいずれか1つに記載のエアバッグ装置であって、
前記フラップの先端部は、前記エアバッグ本体に対して前記連結部材が連結された位置を越えるように延在している、エアバッグ装置。 The airbag device according to any one of claims 1 to 3,
The airbag apparatus, wherein a leading end of the flap extends beyond a position where the connecting member is connected to the airbag body. - 請求項1~請求項4のいずれか1つに記載のエアバッグ装置であって、
前記フラップの基端部は、前記ガス供給口の周縁部より離れた位置で前記エアバッグ本体の外周部に連結されている、エアバッグ装置。 The airbag device according to any one of claims 1 to 4, wherein
The airbag device, wherein a base end portion of the flap is connected to an outer peripheral portion of the airbag body at a position away from a peripheral edge portion of the gas supply port. - 請求項1~請求項5のいずれか1つに記載のエアバッグ装置であって、
前記フラップの基端部は、前記エアバッグ本体に対して前記連結部材が連結された位置よりも前記ガス供給口側で、前記エアバッグ本体の外周部に連結されている、エアバッグ装置。 The airbag device according to any one of claims 1 to 5,
The airbag device, wherein a base end portion of the flap is connected to an outer peripheral portion of the airbag body on a side closer to the gas supply port than a position where the connection member is connected to the airbag body.
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WO2022248450A1 (en) * | 2021-05-26 | 2022-12-01 | Autoliv Development Ab | Airbag with an adaptive ventilation device |
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JP2007099104A (en) * | 2005-10-05 | 2007-04-19 | Ashimori Ind Co Ltd | Air bag device |
JP2010023592A (en) * | 2008-07-16 | 2010-02-04 | Toyoda Gosei Co Ltd | Airbag apparatus |
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JP2007099104A (en) * | 2005-10-05 | 2007-04-19 | Ashimori Ind Co Ltd | Air bag device |
JP2010023592A (en) * | 2008-07-16 | 2010-02-04 | Toyoda Gosei Co Ltd | Airbag apparatus |
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