CN100509493C - Airbag apparatus - Google Patents

Abstract

The airbag apparatus includes an airbag folded and housed in a housing. The airbag includes an outer bag constituting an outer wall of the airbag and an inner bag disposed inside the outer bag. The inner bag includes an outlet port supplying inflation gas into the outer bag and an arm inflatable into a tapered bag contour. The arm holds down a peripheral defected region of the outer bag defected from the housing onto a top plane of a ring of a steering wheel all the while that the inner bag remains completely inflated at the operation of the airbag apparatus.

Description

Airbag apparatus

Technical field

The present invention relates to a kind of airbag apparatus that is equipped in the vehicle, it constitutes has when expansion flows into gas, from be folded accommodate to accommodate the position outstanding and finish the air bag of expansion, in more detail, relate to a kind of air bag by exterior airbag and be disposed at the airbag apparatus that the inner balloon in the exterior airbag constitutes, relate to be applicable to bearing circle with or the airbag apparatus used etc. of co-pilot seat.

Background technology

Current, the airbag apparatus that is equipped on vehicle constitutes, have expanding when flowing into gas, from be folded accommodate to accommodate the position outstanding and finish the air bag of expansion.In addition, as air bag, open shown in flat 9-No. 220995 communiques and 2,001 one No. 80440 communiques of Te Kai as the spy, employing will be expanded and will be installed in the structure of accommodating on the position with the inflow of gas with the periphery of opening.In addition, air bag constitutes and has the exterior airbag that constitutes periphery wall and be configured in inner balloon in the exterior airbag to cover the mode that flows into opening.Have flow export on inner balloon, it makes via flowing into the expansion that flows into opening to go out to the exterior airbag effluent with gas.

In addition, the purpose of flow export of configuration inner balloon is, the expansion that control is flowed out to exterior airbag is with the flow direction of gas, the inflated configuration of the exterior airbag when finishing to expanding from the expansion initial stage adjusting, for example, be adjusted into and promptly carry out to shape of the configuration of the belly of chaufeur etc.That is, in existing airbag apparatus, the inner balloon of air bag can be adjusted the flow direction that gas is used in the expansion that goes out to the exterior airbag effluent.

But in existing airbag apparatus, lift from accommodating the position periphery at the position of accommodating the position peripheral side of the exterior airbag in the repression of swelling process, and make on the exterior airbag expansion this point, has room for improvement.

In addition, if outside air bag is easy to lift from the periphery of accommodating the position, cause easily that then exterior airbag in the expansion phase is repeatedly the time and from the periphery of accommodating the position lifts, Shi Eryu accommodates position periphery butt hunting motion.And the exterior airbag after the expansion props up the passenger with the state that lifts, also can be owing to the periphery of not accommodated the position support, and be difficult to promptly guarantee to play the antagonistic force of buffer action.Perhaps, if in the exterior airbag swing when the mode with the thickness thickening moves and passenger's butt, then exterior airbag can exceedingly push the passenger.

Summary of the invention

The present invention proposes in order to address the above problem, and its purpose is, a kind of airbag apparatus is provided, and lift from the periphery of accommodating the position at the position of accommodating the position peripheral side of its exterior airbag in can the repression of swelling process, and exterior airbag is expanded.

Airbag apparatus involved in the present invention has air bag, and it is expanding when flowing into gas, from be folded accommodate to accommodate the position outstanding and finish expansion, and, expand to be installed in the periphery of opening and accommodate on the position with the inflow of gas.Air bag has the exterior airbag that constitutes periphery wall and is configured in inner balloon in the exterior airbag to cover the mode that flows into opening.Inner balloon has: flow export, and it makes via flowing into the expansion that flows into opening to go out to the exterior airbag effluent with gas; And the wrist of bag shape, it is expanding when flowing into gas, from accommodate the position outstanding and along with the axially roughly direction of the quadrature extension and expanding that flows into opening.The constituted mode of wrist is, inner balloon when airbag apparatus moves keep expand finish shape during, utilization is away from the front position that flows into opening, the inflow of exterior airbag is broken away from the position to the peripheral side pushing of accommodating the position with the opening periphery from accommodating the periphery that the position breaks away from, and, can keep the pushing state.

In airbag apparatus involved in the present invention, after expansion flowed in the air bag via inflow with opening with gas when action, inner balloon was finished expansion before the air bag of the outside.In addition, exterior airbag is also by inner balloon self pushing of expanding, and perhaps, is used to expand with gas from the expansion of the flow export of inner balloon, then, gives prominence to from accommodating the position with inner balloon.

When this exterior airbag expands, the inner balloon utilization of finishing expansion earlier is away from the front position that flows into opening, during shape is finished in the expansion of keeping inner balloon when airbag apparatus moves, the inflow of exterior airbag is broken away from the position to accommodating position peripheral side pushing with the opening periphery from accommodating the periphery that the position breaks away from, and, can keep the pushing state.

Therefore, utilize airbag apparatus involved in the present invention, when exterior airbag was finished to expanding at the expansion initial stage during, can suppress periphery and break away from the position and lift, and expand, the hunting motion in can the repression of swelling process from the periphery of accommodating the position.Its result, even prop up the passenger in expansion phase, exterior airbag also can be promptly supported and is guaranteed antagonistic force by the periphery of accommodating the position, can produce buffer action and props up the passenger rapidly.Certainly, because the hunting motion of exterior airbag is suppressed, so exterior airbag can be exceedingly outstanding to passenger side in its expansion phase, even prop up the passenger in expansion phase, also can stablize, prop up reliably the passenger.

In addition, in airbag apparatus involved in the present invention, the flow export of preferred inner balloon is arranged on the wrist, finishes expansion to promote inner balloon.This be because, if flow export is arranged on the inflow of inner balloon with near the opening, for example relative with opening with inflow, then when inner balloon expands, expansion is easy to flow out from flow export with gas, may make the expansion of inner balloon finish postponement, postponed the period at the periphery disengaging position of pushing exterior airbag.

In this case, the flow export set-up mode of preferred inner balloon is, under the state when the inner balloon expansion is finished, make the direction of the expansion of outflow with gas, be in from the front position of inner balloon to the direction of the peripheral side pushing of accommodating the position direction of quadrature roughly, to the angular range between the direction opposite, to prevent moving of wrist with press direction.

In this structure, flow out at the flow export of the inner balloon when expansion is finished and to expand when using gas, even on inboard air bag, produce the antagonistic force that expands and flow out with gas, because the action direction of this antagonistic force, be in from front (the front position of inner balloon) to the direction of accommodating the pushing of the position peripheral side direction of quadrature roughly, to the angular range between the direction opposite with press direction, therefore can not hinder the pushing state of the leading section of wrist, make and expand to go out to the exterior airbag effluent with gas to the peripheral side of accommodating the position.In addition, flow out expanding from flow export when use gas, push state in order to ensure stable wrist, prevent that wrist from moving, the configuration mode of flow export can for, make direction that expansion flows out from flow export with gas for leading section to the side of the peripheral side pushing of accommodating the position in the opposite direction.In addition, in the case, flow export can dispose one or more on the position relative with the periphery of accommodating the position.In addition, the direction that expansion is flowed out from flow export with gas near with leading section to the direction of the peripheral side pushing of accommodating the position roughly under the situation of the direction of quadrature, consider the counteraction equilibrium of forces that expansion is flowed out with gas, as long as flow export configuration on the axially position in symmetry of wrist is a plurality of.

In addition, the wrist of preferred inner balloon is configured to, and except the front of wrist, can separate with the inner peripheral surface of exterior airbag at least.Its reason is, if wrist is configured to, except the periphery that pushes exterior airbag breaks away from the front at position, can separate with the inner peripheral surface of exterior airbag, then the position between opening periphery and the front is used in the inflow of inner balloon, not limited by the inner peripheral surface of exterior airbag, can move with departing from.Its result as long as inner balloon is set at the shape that the periphery that is easy to push exterior airbag breaks away from the position, just can successfully finish expansion in the mode that becomes this shape.

In this case, the wrist of inner balloon also can constitute, and integral body can be separated with exterior airbag, freely expands with the inner peripheral surface restriction that is not subjected to exterior airbag.In addition, if making the front of wrist break away from the position with the periphery of exterior airbag combines, then the front of inner balloon can't break away from the position dislocation with respect to the periphery of exterior airbag, and inner balloon when folding is remained unchanged with respect to the allocation position of exterior airbag.Therefore, can successfully carry out the folding operation of air bag.

In addition, in the airbag apparatus that the present invention relates to, the constituted mode of preferred inner balloon is, when the inflow that expansion is fixed from periphery with gas makes inner balloon finish expansion separately with the opening inflow, break away from the direction at position at periphery along the pushing exterior airbag, more lean on the position of below the leading section of configuration wrist than the opening surface that flows into opening.

If this structure, the wrist of the inner balloon when finishing that then expands can be guaranteed strong thrust pressure, can be to the peripheral side of accommodating the position, and the periphery that pushes exterior airbag forcefully breaks away from the position.Thus, lift from the periphery of accommodating the position at the periphery disengaging position that further stably suppresses exterior airbag.

In this case, the wrist of inner balloon constitutes by 2, and its configuration mode is for when expansion is finished, and from flowing into the central portion that expands with the position of opening, longshore current is gone into the diametric(al) with opening, and the mode that attenuates with front end extends to front.In addition, the inflow that inner balloon is fixed from periphery with gas in expansion flows into opening and inner balloon is finished separately under the state of expansion, constitutes as follows.That is, flow export is configured in than the leading section of each wrist of inner balloon and more uses on the position of open side, so that the perisporium of each wrist leading section of inner balloon can expand by flowing into.In addition, under the state of observing with the direction of the bearing of trend quadrature of 2 wrists, the generation type of inner balloon is, making with the crest line that flows into between the leading section of 2 wrists of binding of the relative side of opening is convex form, simultaneously, make long with the film that flows into between the leading section of 2 wrists of binding of the relative side of opening, longer than the film that flows into between the leading section of 2 wrists of binding of open side.

In this formation, because the flow export of inner balloon is not configured near the leading section, therefore when the inner balloon expansion was finished, 2 wrists can successfully be expanded to the leading section of the thin shape of front end respectively.In addition, the constituted mode of inner balloon is, finish separately when expanding under the state of observing with the direction of the bearing of trend quadrature of 2 wrists, make and flow into opening in opposite directions the crest line between the leading section of 2 wrists of binding of a side be convex form, simultaneously, make long with the film that flows into between the leading section of 2 wrists of binding of the relative side of opening, longer than the film that flows into between the leading section of 2 wrists of binding of open side.Therefore, when finishing for expanding in inner balloon along power bearing of trend, that perisporium is expanded laterally of each wrist, with become and flow into the film at the position of the crest line of the convex form between the leading section of each wrist of binding of the relative side of opening long,, bigger with the expansionary force of the perisporium of the relative side of opening than inflow than the expansionary force that flows into the perisporium of using open side with inflow with the longer amount correspondence of film between the leading section of 2 wrists of binding of open side.Its result, each leading section be configured in the direction ratio that breaks away from the position along the periphery of pushing exterior airbag flow into the opening surface of opening more by under the position on so that the inflow of disposing of air bag internally of 2 wrists of inner balloon begins bending with the central portion of opening.Especially, when airbag inflation, the inflow of the central portion of inner balloon is mounted fixing with the periphery of opening and can not expands, and the area (area of pressure in bearing) that can guarantee to flow into the expansionary force of the perisporium of open side in fact further diminishes.Therefore, further make with flow into the expansionary force of the perisporium of the relative side of opening bigger than the expansionary force that flows into the perisporium of open side.In addition, the inflow of inner balloon central portion is mounted fixing with the opening periphery, and is easy to begin bending from this peripheral part.Its result, each leading section of 2 wrists of inner balloon can easily be configured in the direction ratio that breaks away from the position along the periphery of pushing exterior airbag flow into the opening surface of opening more by under the position.Therefore, in the inner balloon of this structure, keep expand finish shape during, the strong thrust pressure that the leading section of 2 wrists can easily be played stably, the periphery that can suppress exterior airbag reliably breaks away from the position and lifts from the periphery of accommodating the position.

In addition, inner balloon also can form by having the combination of three-dimensional ground of flexible sheeting.In addition, from the easy degree of making, the generation type of inner balloon also can be to have 1 piece of flexible sheeting doubling, makes overlapping and outer peripheral edges that flatten mutually combine, with can carry out the plane in conjunction with operation.

In addition, the constituted mode that already forms the sheeting under the situation of inner balloon by the planar junction cooperation is, doubling folding line when inner balloon forms, be configured in inner balloon and expand inflow when finishing with on the position between the leading section of 2 wrists of binding of open side, in addition, outer peripheral edges separately in conjunction with edge, become inner balloon expand when finishing with flow into the position between the leading section of 2 wrists of binding of the relative side of opening.In addition, the shape after this sheeting flattens becomes, from the central portion that forms central portion with the position to the front end of the wrist that forms each wrist with the position, the shape that diminishes with the width dimensions of doubling folding line orthogonal directions.

In this structure, can be by the crease doubling of the sheeting after will flattening along regulation, and make the planar junction cooperation industry that overlapping outer peripheral edges mutually combine such, make inner balloon.In addition, certainly easily make with the crest line that flows into between the leading section of 2 wrists of binding of the relative side of opening and become convex form, in addition, can make each wrist become distolateral forward and shape that front end attenuates, and, can make the long with the film between the leading section of 2 wrists of binding of the relative side of opening of inner balloon with inflow, longer than the film between the leading section that flows into 2 wrists of binding of using open side.Its result can make the inner balloon that can suppress the exterior airbag swing easily.

In addition, make sheeting in conjunction with the time, under the situation of combination, preferably make the inner peripheral surface side that is configured in inner balloon in conjunction with the tape edge of edge in that the outer peripheral edges of the sheeting after the doubling are sewed up mutually.In this structure, be configured in the tape edge of inner balloon inner peripheral surface side, can cover lignilite and make its expansion that is not subjected to High Temperature High Pressure gases affect, the lignilite of inner balloon or in conjunction with the breakage of edge (sutural margin) in the time of can preventing to expand.

In addition, at the doubling sheeting overlapping outer peripheral edges are mutually combined, thereby form under the situation of inner balloon, constituting from leading section side to the central portion side of wrist in conjunction with edge is linearity.In addition, for inner balloon, when airbag fold, 2 wrist longshore currents are gone into the diametric(al) of opening extend, to go into the diametric(al) configuration and the mounting of opening in conjunction with the edge longshore current on one side and use open side, Yi Bian make inner balloon along flattening with the direction expansion that combines the edge quadrature in flowing into.In addition, preferably by edge and the direction formation invagination folding line that combines the edge quadrature that flows into the diametric(al) configuration of opening, to central portion with flow into opening relative and fold away from the opposed top of inflow with opening, so that it overlaps on the inner balloon, and inner balloon is housed in the exterior airbag.

In this structure, the inner balloon during airbag fold is externally in the air bag, being that the both sides of line of centers become the line symmetry to flatten in conjunction with edge.Therefore, during folded airbag, utilize invagination folding line position under containing the state of inner balloon, making can be to this orthogonal directions skew in conjunction with edge, can be with the inner balloon balance, be configured in inflow around openings in the exterior airbag symmetrically.Its result, the inner balloon during airbag inflation can balancedly go out to expand with the periphery disengaging position of gas and pushing exterior airbag to the exterior airbag effluent.In addition, inner balloon to constitute from leading section side to the central portion side of wrist in conjunction with edge be linearity.Therefore, to go into to use the diametric(al) configuration of opening and mounting to use open side in conjunction with the edge longshore current on one side in flowing into, when inner balloon is flattened along expanding with the direction that combines the edge quadrature, can not relax near the opposed top, can easily flatten, in addition, can form the invagination folding line and easily with opposed top fold to inner balloon.That is, in the above-described configuration, inner balloon self flattened and be configured in operation in the exterior airbag evenly, also can easily carry out.

In addition, in this case, preferred air bag folding is through following the 1st, 2 folding process and folding.The 1st folding process is, under the state that as mentioned above inner balloon is housed in the exterior airbag, is after the center flattens with air bag to flow into opening, fold so that with the two edges that combine the air bag on the edge orthogonal directions of inner balloon, use opening near flowing into respectively, reduce and make with the width dimensions of the air bag that combines the edge quadrature.The 2nd folding process is, behind the 1st folding process, fold so that the two edges in conjunction with the air bag on the direction of edge of the inner balloon before the 1st folding process are approaching to flowing into opening respectively, reduce and make along width dimensions in conjunction with the air bag of edge direction.In addition, folding with the both sides that combine the edge quadrature of inner balloon in the 1st folding process is in conjunction with edge to be center and symmetry (line symmetry).In addition, being arranged at the flow export of inner balloon, is the center with the linearity that inner balloon is flattened under the state that is housed in the exterior airbag in conjunction with edge, and symmetry is arranged on 2 wrists (line symmetry) respectively.

If this air bag is folding, then when airbag inflation, with the operation roughly opposite with folding process, elimination folds and airbag deployment is expanded.That is, when airbag deployment expanded, at first, inner balloon was finished expansion under the state that 2 wrists are launched, and eliminated the folding of the 2nd folding process.Then, eliminate the folding of the 1st folding process.At this moment, the 1st folding process folding be with inner balloon be the center in conjunction with edge, bilateral symmetry ground is folded.In addition, flow out to expand with the flow export of the inner balloon of gas to exterior airbag, with linearity be the center in conjunction with edge, symmetry is arranged on 2 wrists (line symmetry) respectively.Therefore, in the both sides of exterior airbag on the direction that combines the edge quadrature, expand with gas internally the flow export of air bag flow into, eliminate folding equably and launch and expand.Therefore, utilize as above-mentioned externally air bag in inner balloon self and flow export are set, and the combination between air bag folding can make air bag to the diametric both sides that flow into opening when airbag deployment expands, and launches equably to expand.Promptly, in this structure, before airbag inflation is finished the outer peripheral edges of air bag while launch to become big, when expanding thickening, with the inflow opening of air bag is that the center two edges side that is the line symmetry (with the two edges side of the direction upper gasbag that combines the edge quadrature of inner balloon) can not be offset, but launch equably to expand, the air bag that expands can stably prop up and move the people (passenger who comprises chaufeur) of coming in the zone of regulation.

In addition, in this case, preferably using the two edges of the approaching air bag of opening to inflow in the 1st folding process, is along the left and right edges on the left and right directions of vehicle when expansion is finished.That is, in this structure, while before airbag inflation is finished the outer peripheral edges of air bag launch to become big, when expanding thickening, the left and right edges side of air bag can not moved to a left and right lateral deviation, but about launch expansion equably.Therefore, as long as air bag is redefined in the protection zone of left and right directions and has surplus,, also can stably protect this person even the people who then props up is offset to the left and right.

In addition, with above-mentioned different, when being disposed at inner balloon in the exterior airbag, 2 wrist longshore currents are gone into the diametric(al) of opening to be extended, only on one side will go into diametric(al) configuration in conjunction with the edge longshore current with opening, make on one side inner balloon with along and combine under the situation that mode that the direction of edge quadrature expands flattens, in the folding operation of air bag, be offset along this orthogonal directions easily in conjunction with edge, be difficult to be configured in the exterior airbag evenly.In addition, with above-mentioned different, go under the state that extends with the diametric(al) of opening at 2 wrist longshore currents, to flow on one side and flatten with open side, form on one side the invagination folding line that the leading section with 2 wrists links mutually, overlap under the situation on the inner balloon both sides and fold to make with linearity at the invagination folding line position that the leading section with 2 wrists links mutually in conjunction with edge, expansion is destroyed with the balance that gas flows into state, and exterior airbag can't balancedly expand.In addition, extend in the diametric(al) that makes 2 wrist longshore currents go into the usefulness opening, to go into the diametric(al) configuration and the mounting of opening in conjunction with the edge longshore current on one side and use open side in flowing into, make on one side inner balloon along with the direction expansion that combines the edge quadrature and flatten, simultaneously, form with longshore current and go into the invagination folding line that combines the edge quadrature that the diametric(al) with opening disposes, folding opposed top and when making it overlap on the inner balloon,,, just form easily and hinder with above-mentioned different in conjunction with edge so long as not linearity.For example, if in conjunction with edge is as from flowing into curve-likes such as opening projectioies, when then folding opposed top forming the invagination folding line, take place lax near it, its result, in this case, also can cause in the airbag fold process and inner balloon can't be configured in the exterior airbag with stable collapsed shape in conjunction with edge generation out-of-position problem.Therefore, as mentioned above, at the doubling sheeting overlapping outer peripheral edges are mutually combined, form under the situation of inner balloon, it is linearity that the preferred combination edge constitutes from leading section side to the central portion side of wrist.

In addition, with the sheeting doubling, its outer peripheral edges are mutually combined and make under the situation of inner balloon, the constituted mode of preferred this inner balloon is, form by sewing up sheeting, simultaneously, be provided with sew up mutually with the sheeting doubling, with outer peripheral edges and combination in conjunction with edge and height adjustment suturing part.This height adjustment suturing part forms as follows.At first, with the sheeting doubling, sew up outer peripheral edges mutually and form the inner balloon that is provided with in conjunction with edge.Subsequently, longshore current is gone into the diametric(al) of opening and along forming the invagination folding line with the direction that combines the edge quadrature, make 2 wrists overlapping with open side in inflow, simultaneously to central portion with flow into opening relative and away from the opposed top side that flows into the usefulness opening, form the outer folding folding line that links to each other with the two ends of invagination folding line in the two edges side, become the state that inner balloon is flattened.Then,, the stitching route to skew of invagination folding line and the linearity parallel with the invagination folding line is set from the summit at opposed top, forms the height adjustment suturing part by on the position at opposed top.This height adjustment suturing part can be corresponding from the distance of apex offset with opposed top, to adjusting with the film progress row between the leading section of 2 wrists of binding of the relative side of opening with inflow of inner balloon.That is, the height adjustment suturing part can be adjusted at inner balloon and expand when finishing, and the periphery of the leading section of wrist pushing exterior airbag breaks away from the increase and decrease of the thrust pressure at position.For example, if the height adjustment suturing part is configured to make opposed top to become big from the distance of apex offset, then inner balloon shortens with the film length between the leading section of 2 wrists of binding of the relative side of opening with inflow.In this case, when inner balloon was finished expansion separately, the leading section of 2 wrists reduced along the direction at the periphery disengaging position of pushing exterior airbag and away from the distance of inflow with the opening surface of opening, and sinuousness is reduced.Its result, when the inner balloon expansion was finished, the thrust pressure that the periphery of the leading section pushing exterior airbag of 2 wrists breaks away from the position diminished.On the contrary, if the height adjustment suturing part is configured to make opposed top to diminish from the distance of apex offset, then inner balloon is long elongated with the film between the leading section of 2 wrists of binding of the relative side of opening with inflow.Therefore, in this case, finish separately when expanding in inner balloon, the leading section of 2 wrists breaks away from the direction at position and becomes big away from the distance that flows into the opening surface of opening along the periphery of pushing exterior airbag, makes sinuousness become big.Its result, when inner balloon was finished expansion, the thrust pressure that the periphery of the leading section pushing exterior airbag of 2 wrists breaks away from the position became big.In addition, in the inner balloon that is provided with this height adjustment suturing part, even use identical sheeting, also can adjust the distance of the opposed top of height adjustment suturing part, the thrust pressure in the time of can easily adjusting bending from apex offset.

In addition, as airbag apparatus, can constitute bearing circle and use.Bearing circle constitute have the ring portion of controlling when handling, the hub portion that is disposed at ring portion central authorities and the spoke portion that connects ring portion and hub portion, the top of the hub portion of bearing circle becomes the position of accommodating of air bag after folding.In addition, in this case, preferred inner balloon constituted mode is that when the inner balloon expansion when airbag apparatus moves was finished, the leading section configuration of wrist was to the position of crossing the ring portion upper surface side of accommodating the position periphery.

If this structure, then make exterior airbag can not lift and expand from ring portion.In addition, even because the exterior airbag in the expansion phase props up the chaufeur that forwards moves, and exterior airbag also can be supported by ring portion, guarantees to produce the antagonistic force of buffer action, therefore can stablize, prop up reliably chaufeur.

In this case, preferably be set to extend into the wrist of the upper surface side position of ring portion, with from flow into opening forwards, backwards the direction both sides mode of extending be provided with.

In this formation, expand the initial stage in inner balloon, from accommodate the position outstanding after, the wrist before and after inner balloon makes promptly launches, can be significantly outstanding to driver side, but launch to the fore-and-aft direction along the upper surface of ring portion.Subsequently, after inner balloon expanded and to finish, the expansion gas that utilizes the flow export of air bag internally to flow out can make exterior airbag not lift and expand from ring portion, suppress significantly outstanding as much as possible, can launch to the left and right along the upper surface of ring portion to driver side.At this moment, be positioned at the rear lower of the exterior airbag at ring portion rear portion, expand the initial stage in inner balloon, become the state that covers the ring portion rear portion, subsequently, thickness is thickening gradually.That is, even airbag inflation initial stage externally, chaufeur is approaching to ring portion, also can be between the rear portion of the belly of chaufeur and ring portion, and configuration is in the rear lower of thin state, can expand and thickness is increased.Therefore, the exterior airbag after the expansion can successfully be protected the belly to the approaching chaufeur of bearing circle, and not injured by the rear portion of ring portion.

In addition, have under the situation of finishing 2 wrists, front side wrist and the rear side wrist that extend along fore-and-aft direction when expanding in inner balloon, front side wrist and rear side wrist constitute, when inner balloon is finished expansion, exceed ring portion front and rear upper surface and forwards, backwards both sides extend, in addition, the exterior airbag of air bag is when expansion is finished, be configured in the upper surface side of the huckle of the chaufeur that takes a seat, simultaneously, also can the huckle pushing portion that moves upward that can limit the chaufeur that takes a seat be set in the trailing edge side.

In this formation, during airbag inflation, the pushing portion of the trailing edge side of exterior airbag is configured in the upper surface side of the huckle of the chaufeur that takes a seat.Therefore, even the chaufeur that takes a seat moves and waist is lifted, because the huckle of the pushing portion of exterior airbag restriction chaufeur moving upward, therefore can limit that the waist that makes chaufeur lifts and wait forwards mobile.

In addition, inner balloon constitutes, expand flow into gas and keep expand finish shape during, the both sides of the front and rear of ring portion are pushed downwards.Therefore, for exterior airbag, as long as inner balloon is finished expansion, pushing portion is launched between the belly of the rear portion of ring portion and chaufeur, in addition, utilize the expansion of exterior airbag self, can make pushing portion, be configured on the upper surface position of huckle of chaufeur stably can limit huckle moving and the state that expands upward.In addition, this to ring portion the rear portion and the belly of chaufeur between launch the state of configuration pushing portion, compare with the situation of the inner balloon such as rectification cloth that are provided with in the air bag externally as control with gas flow expanding, have following advantage.That is, not by utilizing gas flow to dispose pushing portion, but by having the inner balloon of front side wrist and rear side wrist as rectification cloth etc., directly the pushing portion of supports outer air bag and channeling conduct are such overhangs action, is configured reliably.Therefore, in said structure, can guarantee stably the state that the pushing portion restriction chaufeur huckle by exterior airbag is moved upward.

In addition, inner balloon not only pushes by the rear side wrist, also pushes the upper surface side of the toe lateral of ring portion by the front side wrist.Therefore, exterior airbag suppresses to the left and right expansion by inner balloon, weakens the pushing of the chaufeur wrist when handling that marches forward on one side, balancedly makes front edge side and trailing edge side expansion expansion on one side.In addition, the pushing portion of exterior airbag trailing edge side can stablize, successfully dispose between the belly of the rear portion of ring portion and chaufeur.

Therefore, in the airbag device for driver's seat of said structure, the unsettled grade of waist that can suppress to make chaufeur reliably moving forwards can prevent chaufeur moving to the windscreen glass side.

In addition, under the situation of said structure, the constituted mode of the rear side wrist of preferred inner balloon is that the rear end side that expands when finishing is arranged to the huckle zone of moving upward that can limit chaufeur.In this structure, finish when expanding in the expand inner balloon at initial stage of air bag (exterior airbag), under state by the inner balloon pushing, the huckle that the pushing portion of exterior airbag can limit chaufeur moving upward.Therefore, even before externally airbag inflation is finished, as long as inner balloon is finished expansion, air bag just can utilize the rear end side of inner balloon, guarantees the pushing portion restriction chaufeur huckle state that moves upward by exterior airbag.

In this case, inner balloon also can constitute, the length dimension of the fore-and-aft direction when finishing that expands, and the length dimension of the fore-and-aft direction when finishing with the exterior airbag expansion is about equally.In this structure, when the exterior airbag after the inner balloon expansion is finished expands, front side wrist by inner balloon and rear side wrist are to the pushing of ring portion side, and the toe lateral of exterior airbag and rear portion side can balancedly expand, and it is outstanding to the part of driver side that exterior airbag can suppress.

In addition, as airbag apparatus, also can be used as with folding accommodate air bag accommodate the position be disposed on the instrument carrier panel position co-pilot seat with and constitute.In this case, the inner balloon constituted mode is that when the inner balloon expansion when airbag apparatus moves was finished, the leading section of wrist was configured to extend into the position of the instrument carrier panel face side of accommodating the position periphery.

If this structure, exterior airbag is expanded and do not lift from the instrument carrier panel face side of accommodating the position periphery, as the exterior airbag in the expansion phase, can reduce to the outstanding partly position of passenger side, can expand to passenger side with the state of widely expansion.Therefore, though exterior airbag in expansion phase with approaching passenger's butt, also can be as much as possible with the soft surface of broad prop up the passenger.

Description of drawings

Fig. 1 is the general view of the airbag system for steering wheel of expression the 1st embodiment involved in the present invention.

Fig. 2 is the longitudinal diagram of vehicle boarded state of the airbag apparatus of the 1st embodiment.

Fig. 3 is the flat summary longitudinal diagram along left and right directions of state down of air bag inner balloon when expansion is finished that uses in the airbag apparatus of the 1st embodiment.

Fig. 4 is the flat summary longitudinal diagram along fore-and-aft direction of state down of air bag inner balloon when expansion is finished that uses in the airbag apparatus of the 1st embodiment.

Fig. 5 is the exploded perspective view of the component parts of the air bag that uses in the airbag apparatus of expression the 1st embodiment.

Fig. 6 A, 6B are the figure of Fabrication procedure of inner balloon that the airbag apparatus of the 1st embodiment is described in order.

Fig. 7 is the outline elevation that expression makes the state after the inner balloon of the 1st embodiment expands separately.

Fig. 8 is the summary ground plan that expression makes the state after the inner balloon of the 1st embodiment expands separately.

Fig. 9 A, 9B, 9C are the summary longitudinal diagrams when representing the action of airbag apparatus of the 1st embodiment in order.

The planar view at the expansion initial stage of the inner balloon when Figure 10 is the action of airbag apparatus of explanation the 1st embodiment.

Planar view when the expansion of the inner balloon when Figure 11 is the action of airbag apparatus of explanation the 1st embodiment is finished.

Figure 12 is the expansion drawing of sheeting of Comparative Examples that is used to represent the inner balloon of the 1st embodiment.

Figure 13 be make the sheeting shown in Figure 12 in conjunction with after the front elevation of rectification cloth.

Figure 14 be make the sheeting shown in Figure 12 in conjunction with after the ground plan of rectification cloth.

Figure 15 is the expansion drawing of sheeting of the variation of the expression inner balloon that is used to make the 1st embodiment.

Figure 16 is that expression makes the sheeting combination shown in Figure 15 and the outline elevation of the state that the inner balloon of manufacturing expands separately.

Figure 17 is the summary ground plan of the inner balloon of Figure 16.

Figure 18 is the expansion drawing of sheeting of other variation of the expression inner balloon that is used to make the 1st embodiment.

Figure 19 be make the sheeting shown in Figure 18 in conjunction with and the oblique drawing of the inner balloon made.

Figure 20 is the expansion drawing of sheeting of other variation of the expression inner balloon that is used to make the 1st embodiment.

Figure 21 be make the sheeting shown in Figure 20 in conjunction with and the oblique drawing of the inner balloon made.

Figure 22 is the longitudinal diagram of the co-pilot seat of expression the 2nd embodiment with the vehicle boarded state of airbag apparatus.

Figure 23 is the exploded perspective view of the component parts of the air bag that uses in the airbag apparatus of expression the 2nd embodiment.

Figure 24 A, 24B, 24C are the summary longitudinal diagrams the when action of airbag apparatus of the 2nd embodiment is described in order.

Figure 25 is the exploded perspective view of the component parts of the air bag that uses in the airbag apparatus of expression the 3rd embodiment.

Figure 26 is the flat summary longitudinal diagram along fore-and-aft direction of state down of air bag inner balloon when expansion is finished that uses in the airbag apparatus of the 3rd embodiment.

Figure 27 A, 27B, 27C are the summary longitudinal diagrams the when action of airbag apparatus of the 3rd embodiment is described in order.

Figure 28 A, 28B, 28C, 28D, 28E illustrate the manufacturing of the inner balloon of using in the airbag apparatus of the 4th embodiment and the figure of the state of accommodating in order in exterior airbag.

Figure 29 A, 29B, 29C are the figure that the airbag fold of the 4th embodiment is described in order.

Figure 30 is the flat summary longitudinal diagram along left and right directions of state down of air bag inner balloon when expansion is finished that uses in the airbag apparatus of the 4th embodiment.

Figure 31 is the flat summary longitudinal diagram along fore-and-aft direction of state down of air bag inner balloon when expansion is finished that uses in the airbag apparatus of the 4th embodiment.

Figure 32 is the planar view of the inner balloon of Comparative Examples of expression the 4th embodiment state of accommodating in exterior airbag.

Figure 33 is the planar view of the inner balloon of other Comparative Examples of expression the 4th embodiment state of accommodating in exterior airbag.

Figure 34 A, 34B, 34C illustrate the manufacturing of inner balloon of variation of the 4th embodiment and the figure of the state of accommodating in order in exterior airbag.

Figure 35 A, 35B are the summary longitudinal diagrams when representing the action of airbag system for steering wheel of the 5th embodiment in order.

Figure 36 A, 36B are the summary longitudinal diagrams when representing the action of airbag apparatus of the 5th embodiment in order, the state after the presentation graphs 35B.

Figure 37 A, 37B are the planar views of the swelling state of the exterior airbag when representing the action of airbag apparatus of the 5th embodiment in order.

Figure 38 is the planar view of swelling state of variation of the airbag apparatus of expression the 5th embodiment.

Figure 39 is the airbag inflation of the airbag apparatus of the 6th embodiment when finishing, the flat summary longitudinal diagram along fore-and-aft direction of state down of air bag.

Figure 40 is the exploded perspective view of the component parts of the air bag that uses in the airbag apparatus of expression the 7th embodiment.

Figure 41 is the airbag inflation of the airbag apparatus of the 7th embodiment when finishing, the flat summary longitudinal diagram along fore-and-aft direction of state down of air bag.

The specific embodiment

Below with reference to accompanying drawing, preferred implementation of the present invention is described.But, the invention is not restricted to the embodiment of following discloses.Modification to claims and equivalent embodiments thereof is included in the scope of claim.

The airbag apparatus M1 of the 1st embodiment as shown in Figure 1, 2, is equipped among the bearing circle W, and bearing circle W constitutes to have: steering wheel main body 1; And airbag apparatus M1, it is disposed at the top of the B of hub portion of steering wheel main body 1 central authorities.Steering wheel main body 1 constitutes to have: circular ring portion R, and it is used for controlling when handling; The B of hub portion, the central authorities that it is disposed at ring portion R are fastened on the steering shaft SS; And 4 S of spoke portion, it links hub B of portion and ring portion R.In the airbag apparatus M1 of the 1st embodiment, constituted by the air bag 10 of being accommodated, can be in expansion phase as much as possible not from the position of accommodating the position periphery, be that the upper surface PR of ring portion R separates and expand (with reference to Fig. 9).

In addition, in the 1st embodiment of this specification sheets, only otherwise special version, then above-below direction is corresponding to the axial above-below direction along steering shaft SS, the fore-and-aft direction of when fore-and-aft direction keep straight on to be handled corresponding to vehicle and axial quadrature steering shaft SS, left and right directions is corresponding to the vehicle left and right directions when handling and axial quadrature steering shaft SS of keeping straight on.

Steering wheel main body 1 constitutes that to have an aluminum alloy etc. metal metal-cored 2 as shown in Figure 2, and this metal-cored 2 disposes in the mode that links ring portion R, the B of hub portion, these each parts of the S of spoke portion.The position of the ring portion R side of the position of metal-cored 2 ring portion R and the S of each spoke portion, the coating 5 of coverage of synthetic resin system.The wheel hub 3 of steel is set on the position of the B of hub portion metal-cored 2, and it is used to insert steering shaft SS and fastening by nut N.In addition, in the bottom of steering wheel main body 1, the plastic lower cover 7 that covers the hub B of portion below is set.

Airbag apparatus M1 constitutes and has as shown in Figure 2: air bag 10, and it is folded accommodates; Charging blower 43, it is supplied with to expand to air bag 10 and uses gas; Air cell covering 49, it covers the top of the air bag 10 after folding; Housing 45, it is accommodated and keeps air bag 10 and charging blower 43, keeps air cell covering 49 simultaneously; And retainer 41, it is used for air bag 10 and charging blower 43 are installed in housing 45 simultaneously.

Retainer 41 forms the four square ring shapes that the columned main part 43a that can make charging blower 43 inserts from the below shown in Fig. 2～4, shown in Fig. 7,8, constitute have outstanding bolt 41a downwards on four angles.Retainer 41 so that the state that bolt 41a protrudes be housed in the air bag 10, when housing 45 is installed, make each bolt 41a run through the through hole 46b (with reference to Fig. 1) of bottom wall portion 46 of housing 45 and the flange part 43c of charging blower 43, by tightening not shown nut, and air bag 10 and charging blower 43 are fixed on the bottom wall portion 46 of housing 45 at each bolt 41a.

Charging blower 43 constitutes and has shown in Fig. 2～4: columned main part 43a has a plurality of gas vent 43b at an upper portion thereof; And flange part 43c, its outer peripheral face from main part 43a is outstanding.On flange part 43c, the not shown through hole that formation runs through each bolt 41a of retainer 41.

Housing 45 as shown in Figure 1, 2, make by plate-shape metal, the side wall portion 47 that has the tabular bottom wall portion of oblong 46 and extend up and down from the outer peripheral edges of bottom wall portion 46, this housing 45 are configured in the top of the B of hub portion of bearing circle W, constitute the position of accommodating of the air bag 10 accommodate after folding.On bottom wall portion 46, the opening that the main part 43a that formation can make charging blower 43 inserts from the below is circular inserting hole 46a, simultaneously around it, forms 4 through hole 46b that each bolt 41a of making retainer 41 runs through.Upper end at side wall portion 47 forms the installation sheet 47a that extends to foreign side, and the installation base plate of not shown horn switch mechanism is installed on installation sheet 47a.Housing 45 utilize these not shown installation base plates and be fixed on bearing circle W metal-cored 2 on, its result, airbag apparatus M1 is equipped on the top of the B of hub portion of the steering wheel main body 1 that is installed on the steering shaft SS.In addition, on the side wall portion 47 of housing 45, utilize rivet 48 grades that the side wall portion 51 of air cell covering 49 is installed.

Air cell covering 49 is made by synthetic resin, and it constitutes has: top wall portion 50, and it covers the top of the air bag 10 of being accommodated; And the side wall portion 51 of four rib barrel shape roughly, it is from extending downwards near the outer peripheral edges of top wall portion 50.On top wall portion 50, form air bag 10 pushings be inflated and 2 50a of door portion opening of both sides forwards, backwards.

Air bag 10 constitutes that making expands and finishes shape and be viewed as circle from the top shown in Fig. 1,2 long and two-short dash line, is viewed as substantially elliptical from the side.Air bag 10 is circular inflow opening 11 at lower side configuration opening shown in Fig. 2～4, flows into gas so that expand.Form mounting hole 13 at the periphery that flows into opening 11, it is used in each bolt 41a that air bag 10 is installed in the retainer 41 on the bottom wall portion 46 of housing 45 and runs through (with reference to Fig. 5).Therefore, in air bag 10, flow into periphery with opening 11 as installation position 12, it is mounted on air bag 10 on the bottom wall portion 46 as the housing 45 of accommodating the position.In addition, flow into, be separately positioned on exterior airbag 15 described later, inner balloon 20 and frenulum with on each overlapping position of cloth 33 with opening 11, each mounting hole 13 and installation position 12.In addition, under overlapping state,, be respectively exterior airbag 15, frenulum with cloth 33, inner balloon 20 from the outer circumferential side of air bag 10 to interior all sides.

In addition, the air bag 10 of embodiment has flexible weaving cotton cloth by polyester or polyamide etc. and forms, and shown in Fig. 3～5, constitutes and has: exterior airbag 15, and it constitutes the periphery wall of air bag 10; And inner balloon 20, it is configured in the exterior airbag 15 to cover the mode that flows into opening 11.Inner balloon 20 has a plurality of (being 4 in embodiment) flow export 27, so that flow out to exterior airbag 15 with gas G (with reference to Fig. 2) via flowing into the expansion that flows into opening 11, so that exterior airbag 15 expands.

Exterior airbag 15 as shown in Figure 5, the 2 car body side wall portions 16 and the chaufeur sidewall portion 17 that become toroidal when flattening constitute.Exterior airbag 15 is sewed up and in conjunction with forming mutually by the outer peripheral edges that make car body side wall portion 16 and chaufeur sidewall portion 17, in addition, so that its mode that is expanded to oval spherical bag shape constitutes.Car body side wall portion 16 externally air bag 15 expansions is positioned at ring portion R side when finishing, chaufeur sidewall portion 17 externally air bag 15 expansions is positioned at driver side when finishing.In the central authorities of car body side wall portion 16, have to flow into and use opening 11, form mounting hole 13 at its periphery.

In addition, on the installation position 12 that flows into opening 11 peripheries, be provided with 32,2 frenulums 32 of 2 frenulums externally air bag 15 expand when finishing, near the central 17a of restriction chaufeur sidewall portion 17 and the separation distance between the installation position 12.Each frenulum 32 forms by frenulum is linked mutually with the 33b of each band portion, the 34b of cloth 33,34.Frenulum constitutes with cloth 33 to have: circular main part 33a, and it combines by sew up waiting with the inflow of car body side wall portion 16 periphery with opening 11; And the 33b of band portion, extend its left and right edges from main part 33a.Frenulum constitutes with cloth 34 to have: the main part 34a of toroidal, and it combines with the central 17a of chaufeur sidewall portion 17 by sewing up to wait; And the 34b of band portion, extend its left and right edges from main part 34a.Frenulum plays effect as the reinforcement cloth of installation position 12 with the main part 33a of cloth 33.

In addition, exterior airbag 15, cover the upper surface side of ring portion R by near the separation distance frenulum 32, the 32 central 17a of restriction, with the outside dimension discoid expansion bigger (with reference to long and two-short dash line, Fig. 9 C of Fig. 2) than the diameter dimension of ring portion R from installation position 12 to chaufeur sidewall portion 17.

Inner balloon 20, the shape when expanding shown in Fig. 5,7,8, constitutes and has: central portion 21, it has and flows into opening 11 and be disposed at 4 mounting holes 13 of its periphery; And wrist 23 (23F, 23B), it goes into the diametric(al) of opening 11 both sides extension forwards, backwards from central portion 21 longshore currents.In inner balloon 20, the inflow of central portion 21 becomes installation position 12 with the periphery of opening 11, and it is held device 41 with exterior airbag 15 and pushes in common fastening mode, and is fixedly installed on the bottom wall portion 46 of housing 45.On the other hand, each wrist 23 is under the situation of embodiment, and being configured to integral body can separate from the inner peripheral surface 15a except that installation position 12 of exterior airbag 15.In addition, the constituted mode of each wrist 23 is that the top 26a near the root 24 the central portion 21 to leading section 26 front ends becomes the thin barrel shape of front end.

The flow export 27 of inner balloon 20, be configured in than the leading section 26 of each wrist 23 and more use on the position of opening 11 sides by inflow, so that when using opening 11 to flow into expansion from inflow with gas G, the whole perisporium of top 26a of the leading section from central portion 21 to each wrist 23 26 of inner balloon 20 is expanded, and, its aperture area is set, expanded can not cross greatly.In addition, under the situation of embodiment, each flow export 27 the root 24 of each wrist 23 and the pars intermedia 25 between the leading section 26 along on the side of fore-and-aft direction, be that circular mode forms with the opening, on each wrist 23, be provided with 2, be provided with 4 altogether.In addition, the constituted mode that is arranged at the flow export 27 on each wrist 23 is, for each wrist 23 can not separated from the upper surface PR of ring portion R, axle center C with wrist 23 is the center, from the upper surface PR axial GD of about 30 degree configurations that is inclined upwardly, and make and expand with gas G along should axial GD outflow (with reference to content in the bracket of Fig. 8).

In addition, inner balloon 20, so that the state that each bolt 41a gives prominence to from mounting hole 13, the retainer 41 of in inner balloon 20, packing into, become the state that the inflow of central portion 21 is fixed with the installation position 12 of the periphery of opening 11, in addition, under the states that inner balloon 20 is expanded separately, become as Fig. 7,8 state.Promptly, under the state of observing with the left and right directions of the fore-and-aft direction quadrature that extends along 2 wrist 23F, 23B, comparing with the opening surface OP that flows into opening 11, along with expand with the opposite direction DB of the inflow direction DF of gas G by on the position down, dispose the top 26a of the leading section 26 of each wrist 23 of front and back.In other words, the shape that inner balloon 20 expands separately constitutes, the top 26a of the leading section 26 of each wrist 23 before and after making, along periphery being broken away from the action direction (with reference to Fig. 9 B) of position 16a to the thrust pressure PW of peripheral side (component side of the housing 45 peripheries) pushing of housing 45, be configured in compare with opening surface OP by under the position on, described periphery break away from position 16a be exterior airbag 15 inflow with opening 11 peripheries from position that housing 45 separates.

In addition, the inner balloon 20 of embodiment constitutes, when expansion is finished, with flowing into the crest line 29a between the leading section 26 of binding 2 wrist 23F, 23B on the upside perisporium 29 of opening 11 relative sides is convex form, film between the leading section 26 of binding 2 wrist 23F, the 23B of upside perisporium 29 long (epipleura is long) LU is longer than flowing into the film between the leading section 26 of 2 wrist 23F, 23B on the downside perisporium 30 of opening 11 sides long (following side form is long) LD simultaneously.Upside perisporium 29 is the top 26a from wrist 23F, via upper surface 23a, the upper surface 21a of central portion 21, the upper surface 23a of wrist 23B of wrist 23F, until the position of the top of wrist 23B 26a.Downside perisporium 30 is the top 26a from wrist 23F, via the lower surface 23a of the lower surface 23a of wrist 23F, the lower surface 21a of central portion 21 (this position becomes the installation position of being fixed by retainer 41 12), wrist 23B, until the position of the top of wrist 23B 26a.

The generation type of this inner balloon 20 is under the state that flattens, with oval tabular sheeting 36 doublings shown in Fig. 6 A, shown in Fig. 6 B, to make between the overlapping outer peripheral edges 36a by combinations such as stitchings.In addition, car body side wall portion 16 and chaufeur sidewall portion 17 that this sheeting 36, above-mentioned frenulum are used cloth 33,34 and constituted exterior airbag 15 have flexible weaving cotton cloth by polyester or polyamide etc. and form.And sheeting 36 in order to improve resistance to effect of heat, on a side that becomes inner balloon 20 inner peripheral surface sides, forms the coating that is made of silicone rubber etc.

As the shape that sheeting 36 flattens, constitute and have: central portion is with position 37, and it is provided with and flows into opening 11 and mounting hole 13; And 2 wrists are with positions 38,38, and it is gone into the diametric(al) of opening 11 with position 37 longshore currents from central portion and extends to both sides.Doubling sheeting 36 and make between the overlapping outer peripheral edges 36a in conjunction with the time folding line FV, be configured on the position of major axis of the elliptical shape after sheeting 36 is flattened.In addition, inner balloon 20 constitutes, and the leading section 26 from central portion 21 to wrist 23F, 23B becomes the thin barrel shape of front end.Thus, the sheeting 36 of flattening forms, from central portion with position 37 to wrist with the front end 38a at position 38,38, the shape that diminishes with the width dimensions BL of the direction of the folding line FV quadrature of doubling.

Therefore, combination just can form inner balloon 20 by sewing up between the overlapping outer peripheral edges as long as the sheeting 36 that will be provided with inflow usefulness opening 11 and mounting hole 13 along folding line FV doubling, makes.And, overlapping and make the outer peripheral edges 36a of the sheeting 36 of combination between the outer peripheral edges, become inner balloon 20 expand when finishing with the position that flows into the crest line 29a of relative upside perisporium 29 sides of opening 11.In addition, the position 36b of folding line FV becomes inner balloon 20 and expands inflow when finishing with the position of the downside perisporium 30 of opening 11 sides.

In addition, the inner balloon 20 that produces is as Fig. 9 B and shown in Figure 11, to the length dimension between the leading section 26 of wrist 23F, 23B, the length dimension LL (with reference to Fig. 6 A) of position 36b that promptly becomes the folding line FV of sheeting 36 sets, so that the expansion when airbag apparatus M1 moves is when finishing, leading section 26 configuration that makes wrist 23F, 23B to cross air bag 10 after folding accommodate the position, be the position of periphery on the top (housing 45) of the B of hub portion, under the situation of embodiment, for crossing the upper surface PR side position of ring portion R.

In addition, the manufacturing of exterior airbag 15 at first, is fixed on the main part 33a of frenulum with cloth 33 on the car body side wall portion 16 in advance, simultaneously the main part 34a of frenulum with cloth 34 is fixed in the chaufeur sidewall portion 17.Then, the surface that becomes the outer peripheral face side is in contact with one another and make car body side wall portion 16 and chaufeur sidewall portion 17 overlapping, outer peripheral edges are mutually combined.Subsequently, expose to the outer peripheral face side, utilize to flow into and rout up with opening 11 in order not make in conjunction with limit (tape edge).Then, as long as frenulum is mutually combined with the cooresponding band 33b of portion, the 34b of cloth 33,34, just can produce exterior airbag 15.

Under the situation of in vehicle, carrying at assembling airbag apparatus M1, at first, so that the mode that each bolt 41a gives prominence to from mounting hole 13, the retainer 41 of in inner balloon 20, packing into.Then, inner balloon 20 is packed in the exterior airbag 15, simultaneously, make bolt 41a outstanding, assembling air bag 10 from each mounting hole 13 of exterior airbag 15.Then, folded airbag 10, and utilize the anti-loose material of regulation to wrap up air bag 10, loose to prevent.Subsequently, so that each bolt 41a accommodates air bag 10 on the bottom wall portion 46 in housing 45, in addition from the outstanding mode of through hole 46b, the main part 43a of charging blower 43 is inserted the inserting hole 46a of bottom wall portion 46 from the below, make each bolt 41a run through flange part 43c.After this,, just can in as the housing 45 of accommodating the position, accommodate air bag 10 and charging blower 43 as long as tighten not shown nut at each bolt 41a, and, utilize retainer 41, air bag 10 and charging blower 43 can be installed.Then, by on housing 45, covering air cell covering 49, utilize rivet 48 grades that side wall portion 47,51 is linked mutually, and air cell covering 49 is installed on housing 45, after this, as long as on the installation sheet 47a of housing 45, not shown horn switch mechanism is installed, just can assembles out airbag apparatus M1.And airbag apparatus M1 is to the lift-launch of vehicle, as long as in advance on the steering wheel main body 1 that is anchored on the steering shaft SS, utilizes the not shown installation base plate of horn switch mechanism, and airbag apparatus M1 is installed, just can be with airbag apparatus M1 lift-launch on vehicle.

The airbag apparatus M1 that this bearing circle W uses as shown in Figure 2, flows into air bag 10 with gas G via flowing into opening 11 if expand when action, then air bag 10 expands, and pushes the 50a of door portion, the 50a of air cell covering 49 open.Subsequently, air bag 10 from outstanding as the housing 45 of accommodating the position, is finished expansion in the mode of the upper surface PR side that covers ring portion R shown in the long and two-short dash line of Fig. 2.At this moment, at the expansion initial stage of air bag 10, shown in Fig. 9 A, B and Figure 10,11, inner balloon 20 is earlier finished expansion than exterior airbag 15.In addition, inner balloon that exterior airbag 15 also is inflated 20 self pushing perhaps, is used to expand with gas G from the expansion of the flow export 27 of inner balloon 20, thereby gives prominence to from housing 45 with inner balloon 20.

When this exterior airbag 15 expands, finish the inner balloon 20 of expansion earlier, utilization is away from flowing into each wrist 23F with opening 11, the leading section 26 of 23B, during shape is finished in the expansion of keeping inner balloon 20 when airbag apparatus M1 moves, use the periphery that separates from housing 45 of opening 11 peripheries to break away from position 16a the inflow of car body side wall portion 16, peripheral side to housing 45 is the upper surface PR thruster pressure of ring portion R, and keeps the pushing state.In addition, in the airbag apparatus M1 of the 1st embodiment, after air bag 10 expands and finishes, promptly, exterior airbag 15 utilizes expansion that the inflow entrance 27 of air bag 20 internally supplies with gas G after finishing expansion, if stop from the expansion of charging blower 43 supply with gas G, then shown in Fig. 9 B, C, it is flat down that inner balloon 20 is finished shape by expansion, becomes the state that can't bring into play thrust pressure PW.

Therefore, use among the airbag apparatus M1 at the bearing circle W of the 1st embodiment, exterior airbag 15 is shown in Fig. 9 B, expansion after the finishing supply stopping period of gas G from expansion initial stage to expansion, expand from the mode that is suppressed of lifting of the upper surface PR of ring portion R owing to break away from position 16a with the periphery of the peripheral side of housing 45, the hunting motion in therefore can the repression of swelling process (exterior airbag 15 from ring portion R separate and once more with the hunting motion of ring portion R butt).Its result, even prop up passenger's (chaufeur) in expansion phase, exterior airbag 15 also can be promptly supported by the upper surface PR of ring portion R and guarantees antagonistic force, can produce buffer action and promptly props up chaufeur.Certainly; because the hunting motion of exterior airbag 15 is suppressed; therefore exterior airbag 15 can be exceedingly not outstanding to driver side in its expansion phase, even prop up the chaufeur that forwards moves in expansion phase, can stably prop up chaufeur to protect yet.

In addition, in the airbag apparatus M1 of the 1st embodiment, inner balloon 20 constitutes, shown in Fig. 7,8, under the state that utilizes retainer 41 that installation position 12 is fixed, finish when expanding individually, comparing with the opening surface OP that flows into opening 11, along the action direction of the thrust pressure PW of the periphery disengaging position 16a of pushing exterior airbag 15 and by under the position on, dispose the leading section 26 of each wrist 23F, 23B.

Therefore, each wrist 23F, the 23B of the inner balloon 20 when expansion is finished, the periphery that can guarantee bigger car body side wall portion 16 with exterior airbag 15 breaks away from the thrust pressure PW that position 16a presses to the upper surface PR of ring portion R thruster, and the position of peripheral side that can further stably suppress the housing 45 of exterior airbag 15 is that the integral body of car body side wall portion 16 is lifted from the upper surface PR of ring portion R.Especially, under the situation of embodiment, when being equipped on vehicle, the upper surface PR of ring portion R is disposed on the high position of ratio open face OP, can further guarantee big thrust pressure PW.

In addition, in the inner balloon 20 of embodiment, wrist 23F, 23B are constituted by 2, its configuration mode is, when expansion is finished, from flowing into the central portion 21 that expands with the position of opening 11, longshore current is gone into the diametric(al) with opening 11, the distolateral forward extension of mode that attenuates with front end.In addition, make the inflow that is fixed from periphery with gas G of expanding with opening 11 inflows and inner balloon 20 is finished separately under the state of expansion, shown in Fig. 7,8, flow export 27 is configured in leading section 26 than each wrist 23F, the 23B of inner balloon 20 more by flowing on the position with opening 11 sides, so that the perisporium of the leading section 26 of each wrist 23F, the 23B of inner balloon 20 can be expanded to top 26a.In addition, under the state of observing with the direction of the bearing of trend quadrature of 2 wrist 23F, 23B, inner balloon 20 independent inflated configuration form, making with the crest line 29a that flows into the upside perisporium 29 of opening 11 relative sides is convex form, make the long LU of epipleura between the leading section 26 of wrist 23F, 23B of upside perisporium 29 simultaneously, grow than the long LD of following side form that flows into between the leading section 26 of wrist 23F, the 23B of the downside perisporium 30 of opening 11 sides.

In this structure, the flow export 27 of inner balloon 20 be not disposed at leading section 26 near.Therefore, when inner balloon 20 expansions were finished, 2 wrist 23F, 23B can successfully be expanded to the leading section 26 of the thin shape of front end respectively.In addition, finish the inner balloon 20 when expanding separately, the crest line 29a of upside perisporium 29 is a convex form, and, the long LU of the epipleura of upside perisporium 29, long LD is long than the following side form of downside perisporium 30.Therefore, inner balloon 20 expand when finishing along each wrist 23F, the power that upside perisporium 29 and downside perisporium 30 are expanded laterally of 23B bearing of trend, corresponding with the amount that the long LU of epipleura is longer than the long LD of following side form, as shown in Figure 7, the expansionary force PU of upside perisporium 29 is bigger than the expansionary force PD of downside perisporium 30, its result, each leading section 26 is configured in the opening surface OP that flows into opening 11 to be compared, break away from along the periphery of pushing exterior airbag 15 position 16a thrust pressure PW action direction by under the position on so that 2 wrist 23F of inner balloon 20,23B being provided with of air bag 20 internally flows into central portion 21 bendings of using opening 11.In addition, especially, when air bag 10 expanded, the inflow of the central portion 21 of inner balloon 20, was fixed on by retainer 41 on the bottom wall portion 46 of housing 45 as becoming the roughly installation position 12 of square area with the periphery of opening 11, can not expand.Therefore, the area (bear in press area) that can guarantee the expansionary force PD of downside perisporium 30 in fact further diminishes.Its result further makes the expansionary force PU of upside perisporium 29 bigger than the expansionary force PD of downside perisporium 30.In addition, the inflow of the central portion 21 of inner balloon 20 is with the periphery of opening 11, installed and fixed with tabular by the retainer with rigidity made as plate-shape metal 41, is easy to from its marginal portion bending.Therefore, each leading section 26 of 2 wrist 23F, 23B of inner balloon 20, be easy to be configured in than flow into the opening surface OP of opening 11 along the action direction of thrust pressure PW by under position side.Therefore, in the inner balloon 20 of this structure, keep expand finish shape during, the strong thrust pressure PW that the leading section 26 of 2 wrist 23F, 23B can easily be played stably, the car body side wall portion 16 of peripheral side that can suppress the housing 45 of exterior airbag 15 reliably lifts from the upper surface PR of ring portion R.

In addition, can guarantee the inner balloon 20 of this strong thrust pressure PW, under the situation of embodiment, only be by sheeting 36 with the regulation shape, along folding line FV doubling, the planar junction cooperation that overlapping outer peripheral edges 36a is mutually combined is already made, and can make easily.In addition, this sheeting 36 is following shape, that is, from the central portion that forms central portion 21 with position 37 to the front end 38a of the wrist that forms each wrist 23F, 23B with position 38,38, the width dimensions BL with the direction of doubling folding line FV quadrature is diminished.

In addition, sheeting as a comparison case under the situation of the sheeting 36A that uses the shape shown in Figure 12～14, can't produce the inner balloon of performance thrust pressure.This sheeting 36A is shaped as, from the central portion that forms central portion 21 with position 37 to the front end 38a of the wrist that forms each wrist 23F, 23B with position 38,38, with the width dimensions BL of doubling folding line FV orthogonal directions be same size.In this sheeting 36,, also only can form the rear and front end opening and rectification cloth 40 roughly cylindraceous that the expansion of inflow is flowed out from openings at two ends with gas even outer peripheral edges 36a is mutually combined along folding line FV doubling.In addition, even utilize this rectification cloth 40, retainer 41 is installed and fixing the inflow with opening 11, make and expand with gas G from flowing into opening 11 inflows and expanding, shown in Figure 13,14, also be difficult to form convex form with the crest line 29a that flows into the upside perisporium 29 of opening 11 relative sides, in addition, each wrist 23F, 23B can't form forward end 26 and shape that front end attenuates.Like this, can't make the long LU of epipleura of the upside perisporium 29 of rectification cloth 40 grow (becoming LU=LD), therefore, can't produce thrust pressure PW than the long LD of the following side form of downside perisporium 30.

In addition, as inner balloon, as long as it is littler with the aperture area of the flow export 27 of gas than being used for supplying with expansion to exterior airbag 15, and front end until the leading section 26 of the performance thrust pressure of each wrist 23, the mode that swells with perisporium performance tension force expands, shown in then also can the inner balloon 20B shown in Figure 15～17, make top 26a opening.This inner balloon 20B uses the sheeting 36B of following shape, its from central portion of forming central portion 21 with position 37 to the front end 38a of the wrist that forms each wrist 23F, 23B with position 38,38, diminish with the width dimensions BL of doubling folding line FV orthogonal directions.In addition, the generation type of inner balloon 20B is, sheeting 36B is folding along folding line FV, do not make near the front end 38a in conjunction with (stitching), and overlapping outer peripheral edges 36a is mutually combined.In the inner balloon 20B that forms like this, the fixing inflow if retainer 41 is installed with opening 11, make and expand with gas G from flowing into opening 11 inflows and expanding, then shown in Figure 16,17, inner balloon 20B can successfully be expanded near the top 26a of wrist 23F, 23B.Therefore, in this inner balloon 20B, can form convex form with the crest line 29a that flows into the upside perisporium 29 of opening 11 relative sides, in addition, each wrist 23F, 23B can form forward end 26 and shape that front end attenuates.And,, it is hereby ensured thrust pressure PW owing to the long LU of epipleura of the upside perisporium 29 that can make inner balloon 20B is longer than the long LD of the following side form of downside perisporium 30.

In addition, outer shape as sheeting, also can be shown in the sheeting 36C shown in Figure 18,19, form from the central portion that forms central portion 21 with position 37 to the front end 38a of the wrist that forms each wrist 23F, 23B the rhombus that diminishes with the width dimensions BL of doubling folding line FV orthogonal directions with position 38,38.Like this, the inner balloon 20C by this sheeting 36C forms also can make each leading section 26 of each wrist 23F, 23B be positioned at the below that flows into the opening surface OP of opening 11 when expansion is finished, and guarantees strong thrust pressure PW.

In addition, as inner balloon, as long as wrist can utilize away from the front position that flows into opening, inner balloon when airbag apparatus moves keep expand finish shape during, the inflow of exterior airbag is broken away from the position to the peripheral side pushing of accommodating the position with the opening periphery from accommodating the periphery that the position breaks away from, and can keep the pushing state, then also can have flexible sheeting three-dimensionally in conjunction with forming by making.For example, shown in Figure 20,21, also can will be cut to the regulation shape, then by making periphery mutually three-dimensionally in conjunction with forming by flexible sheeting 36D that has that constitutes that weaves cotton cloth such as polyester.In the inner balloon 20D that is formed by this sheeting 36D, wrist 23F, 23B constitute by 2, and its configuration mode is, when expansion is finished, from flowing into the central portion 21 that expands with opening 11 positions, longshore current is gone into the diametric(al) with opening 11, the distolateral forward extension of mode that attenuates with front end.In addition, expansion is flowed into opening 11 from the inflow that periphery is fixed with gas, inner balloon 20D is finished separately under the state of expansion, flow export 27 is configured in than the leading section 26 of each wrist 23F, the 23B of inner balloon 20D more by flowing on the position with opening 11 sides, expands with the perisporium of the leading section 26 of each wrist 23F, the 23B that can make inner balloon 20D.In addition, the independent expansion of inner balloon 20D is finished and is shaped as, under the state of observing with the direction of the bearing of trend quadrature of 2 wrist 23F, 23B, with the crest line 29a that flows into the relative upside perisporium 29 of opening 11 is convex form, the long LU of epipleura of upside perisporium 29 is longer with the long LD of the following side form of the downside perisporium 30 of opening 11 sides than inflow simultaneously.Therefore, this inner balloon 20D also can guarantee the leading section 26 failure-free thrust pressure PW downwards of each wrist 23F, 23B reliably when expansion is finished.

In addition, under the situation of the 1st embodiment, the flow export 27 of inner balloon 20 constitutes, under the state when inner balloon 20 expansions are finished, the expansion that makes outflow with the direction of gas G is, shown in content in the bracket of Fig. 8, is the center with the axle center C of wrist 23, from the upper surface PR axial GD of about 30 degree configurations that is inclined upwardly, making and expanding with gas G along should axial GD outflow.Therefore,, can not hinder the state of the leading section 26 of wrist 23F, 23B, go out to exterior airbag 15 effluents to the upper surface PR of ring portion R thruster pressure from the expansion gas G that flow export 27 flows out.

In addition, as the state that can prevent that wrist 23 from moving, the configuration mode of preferred streams outlet 27 is, the expansion that makes outflow is with the outflow direction of gas G (opening of flow export 27 axially) GD, be in the direction DH with the direction quadrature that leading section 26 is pressed to the upper surface PR of ring portion R thruster, to the angular range, theta between the direction DV opposite (with reference to the content in Fig. 8 bracket) with press direction.In addition, when gas G is used in expansion from flow export 27 outflows, guarantee stable pushing state in order to prevent wrist 23 from moving, for example, make outflow direction (axially) GD that expands with gas G, for with leading section 26 to the side of the peripheral side pushing of accommodating the position in the opposite direction under the situation of DV, flow export 27 can be to dispose one or more on the relative position of the upper surface PR of ring portion R with the periphery of accommodating the position.Perhaps, flow out direction that direction (axially) GD approached and pushed leading section 26 roughly under the situation of the direction DH of quadrature making, consider to expand and use the counteraction equilibrium of forces of gas G outflow, as long as flow export 27 is a plurality of in configuration on the position of axial direction in symmetry of wrist 23.In the 1st embodiment, on 2 positions in the position of axial direction in symmetry of wrist 23, flow export 27 is set, expanding with gas G when flow export 27 flows out, can guarantee the state that the leading section 26 of each wrist 23F, 23B stably pushes.

In addition, as long as inner balloon can promptly be finished expansion, the periphery that the front of wrist can push exterior airbag breaks away from the position, and then flow export also can dispose below tiltedly at wrist, or is arranged on central portion.

In addition, in the air bag 10 of the 1st embodiment, when action, as Fig. 9 A, shown in Figure 10, at the expansion initial stage of inner balloon 20, after outstanding as the housing 45 on the top of the B of the hub portion that is disposed at that accommodates the position, each wrist 23F, 23B promptly extend, can be not outstanding than heavy back to driver side, but launch to the fore-and-aft direction along the upper surface PR of ring portion R.Subsequently, as Fig. 9 B, shown in Figure 11, if inner balloon 20 is finished expansion, then from each flow export 27 of wrist 23F, 23B, supply with expansion in the left and right sides to exterior airbag 15 sides and use gas G, suppress outstanding than heavy back, and widely launch to the left and right along the upper surface PR of ring portion R to driver side.At this moment, be positioned at the rear lower 15b of the exterior airbag 15 on the rear R B of ring portion R,, make thickness thickening gradually to cover the state of rear R B.That is, for exterior airbag 15, even at the expansion initial stage, chaufeur is approaching to ring portion R, also can be between the rear R B of the belly of chaufeur and ring portion R, and the rear lower 15b of the thin state of configuration subsequently, can expand and thickness is increased.Therefore, exterior airbag 15 can successfully be protected the belly to the approaching chaufeur of bearing circle W, and not injured by the rear R B of ring portion R.

In addition, if do not consider this point, then 2 of inner balloon 20 wrists 23 also can be set to extend the both sides of direction to the left and right from central portion 21.

In addition, in the 1st embodiment, the airbag apparatus M1 that bearing circle W is used is illustrated, but the present invention also is applicable to the co-pilot seat airbag apparatus M2 of the 2nd embodiment shown in Figure 22～24.This airbag apparatus M2 as co-pilot seat with and constitute, what it will be folded the air bag 70 of accommodating accommodates position (housing 45), be configured on the position of instrument carrier panel 60, inner balloon 20E constitutes, inner balloon 20E when airbag apparatus M2 moves expands when finishing, and makes the leading section 26 of each wrist 23F, 23B dispose the position of promptly crossing the face side position 61 of instrument carrier panel 60 until the periphery of accommodating the position.In addition, under the situation of embodiment, face side position 61 is that the periphery of the opening after the back side of door portion 50a of air cell covering 49 and the 50a of door portion open is the position of instrument carrier panel 60.

In addition, air bag 70 is with oblong on the tabular formation this point, very big with air bag 10 difference at the car body side wall portion 76 that constitutes exterior airbag 75 and passenger's side wall portion 77.In addition, housing 45 does not link with horn switch mechanism, remains on the car body side and be bonded.In addition, air cell covering 49 forms with instrument carrier panel 49.And the difference of airbag apparatus M2 and airbag apparatus M1 is, with air bag 70 as co-pilot seat with and volume increases to direct ratio, various piece maximizes, the label identical with the various piece mark to the parts identical with the 1st embodiment.In addition, airbag apparatus M2 at first, utilizes retainer 41 to the lift-launch of vehicle, the air bag 70 after folding and charging blower 43 is accommodated remain in the housing 45.Subsequently, the side wall portion 47 of side wall portion 51 and housing 45 of the air cell covering 49 of instrument carrier panel 60 sides that are equipped on vehicle is linked, as long as the not shown installation bracket that will be arranged on the bottom wall portion 46 of housing 45 is installed in the car body side, just airbag apparatus M2 can be carried in vehicle.

In addition, in the airbag apparatus M2 that co-pilot seat is used, when action, as shown in figure 22, flow into air bags 70 with gas G via flowing into opening 11 if expand, then air bag 70 expands and pushes the 50a of door portion, the 50a of air cell covering 49 open, shown in the long and two-short dash line of Figure 22, from outstanding, be that the mode at face side position 61 is finished expansion with the periphery of the housing 45 that covers instrument carrier panel 60 as the housing 45 of accommodating the position.At this moment, at the expansion initial stage of air bag 70, shown in Figure 24 A, B, the inner balloon 20E that can separate from the inner peripheral surface 75a of exterior airbag 75 earlier finishes expansion than exterior airbag 75.In addition, exterior airbag 75 is also by inner balloon 20E self pushing of expanding, and perhaps, is used to expand with gas G from the expansion of the flow export 27 of inner balloon 20E, thereby gives prominence to from housing 45 with inner balloon 20E.

When this exterior airbag 75 expands, finish the inner balloon 20E of expansion earlier, utilization is away from flowing into each wrist 23F with opening 11, the leading section 26 of 23B, the expansion of keeping inner balloon 20E when airbag apparatus M2 moves finish shape during, use the periphery that breaks away from from housing 45 of opening 11 peripheries to break away from position 76a the inflow of car body side wall portion 76, peripheral side to housing 45 is 61 pushings of face side position, and keeps the pushing state.Certainly, in the airbag apparatus M2 of the 2nd embodiment also be, after air bag 70 expansions are finished, promptly, after exterior airbag 75 expands and finishes, if the supply of expanding with gas G stops, then shown in Figure 24 B, C, it is flat down that inner balloon 20 is finished shape by expansion, becomes the state that can't bring into play thrust pressure PW.

Therefore, use among the airbag apparatus M2 at the co-pilot seat of the 2nd embodiment, during stopping with the supply of gas G, exterior airbag 75 is expanded in the mode of not lifting from the face side position 61 of instrument carrier panel 60 from expansion initial stage of exterior airbag 75 to the expansion after finishing of expanding.In addition, the exterior airbag 75 in the expansion phase can reduce to the outstanding partly position of passenger side, expands to passenger side with the state of widely expanding.Thus, though exterior airbag 75 in expansion phase with approaching passenger's butt, also can be as much as possible with the soft surface of broad prop up the passenger.

In addition, in the 2nd embodiment, make wrist 23F, the 23B of inner balloon 20E be configured to extend the direction both sides forwards, backwards, but also can make wrist 23 be configured to extend both sides to the left and right from central portion 21 from central portion 21.

In addition, in the 1st, 2 embodiments, wrist 23F, the 23B of inner balloon 20,20E constitute, and not limited and expansion freely by inner peripheral surface 15a, the 75a of exterior airbag 15,75, make integral body to separate from exterior airbag 15,75.Therefore, wrist 23F, 23B can not be subjected to inner peripheral surface 15a, the 75a restriction of exterior airbag 15,75 and move with departing from, if inner balloon 20,20E are set at the shape that the periphery that is easy to push exterior airbag 15,75 breaks away from position 16a, 76a, then can successfully finish expansion in the mode that becomes this shape.

In this case, also can be shown in the inner balloon 20F of the air bag 10F of the airbag apparatus M3 of the 3rd embodiment shown in Figure 25～27, at least only make the periphery of leading section 26 sides and exterior airbag 15 break away from position 16a and combine by sewing up grade.In the 3rd embodiment, the length dimension of inner balloon 20F is set at, and makes the length dimension of inner balloon 20 of the 1st embodiment elongated, is positioned on the car body side wall portion 16 if flatten, and then equates with its diameter dimension.In addition, for this inner balloon 20F,, at the outer peripheral edges 16b that makes car body side wall portion 16 and chaufeur sidewall portion 17, when 17b mutually combines, sew up together, thereby combine with exterior airbag 15 with each top 26a of each leading section 26,26.Have only on this point differently, other position, parts are identical with the 1st embodiment, to identical position, label that the parts mark is identical with the 1st embodiment, omission explanation.

In the 3rd embodiment, when action, flow into air bag 10F with gas G via flowing into if expand with opening 11, then as shown in figure 27, air bag 10F pushes the 50a of door portion, the 50a of air cell covering 49 open, from outstanding, finish expansion in the mode of the upper surface PR side that covers ring portion R as the housing 45 of accommodating the position.At this moment, at the expansion initial stage of air bag 10F, shown in Figure 27 A, B, inner balloon 20 is earlier finished expansion than exterior airbag 15, and then, exterior airbag 15 begins to expand.When this exterior airbag 15 expands, finish the inner balloon 20F of expansion earlier, utilization is away from flowing into each wrist 23F with opening 11, the leading section 26 of 23B, the expansion of when airbag apparatus M3 moves, keeping inner balloon 20F finish shape during, use the periphery that breaks away from from housing 45 of opening 11 peripheries to break away from position 16a the inflow of car body side wall portion 16, peripheral side to housing 45 is the upper surface PR thruster pressure of ring portion R, and keeps the pushing state.At this moment, because except the 26a of top, wrist 23F, 23B can not be subjected to the inner peripheral surface 15a restriction of exterior airbag 15 and move with departing from, so inner balloon 20F can successfully finish expansion, become the shape that the periphery that is easy to push exterior airbag 15 breaks away from position 16a.

In addition, in the airbag apparatus M3 of the 3rd embodiment, after air bag 10F expands and finishes, promptly, exterior airbag 15 utilizes expansion that the flow export 27 of air bag 20F internally supplies with gas G after finishing expansion, if stop to supply with expansion gas G from charging blower 43, then shown in Figure 27 B, C, it is flat down that inner balloon 20F finishes shape by expansion.

Use among the airbag apparatus M3 at the bearing circle W of the 3rd embodiment, with the 1st embodiment in the same manner, shown in Figure 27 B, from expansion initial stage of exterior airbag 15 to expand after finishing expansion with the supply of gas G stop during, make the periphery of the peripheral side of housing 45 break away from position 16a and lift from the upper surface PR of ring portion R and be suppressed, exterior airbag 15 expands in the mode of the hunting motion in the repression of swelling process.Therefore, even exterior airbag 15 props up chaufeur in expansion phase, also can produce buffer action and promptly prop up chaufeur.

In addition, in the 3rd embodiment, the top 26a of inner balloon 20F combines with exterior airbag 15, and leading section 26 sides of inner balloon 20F can not break away from 16a dislocation in position from the periphery of exterior airbag 15.Therefore, in the air bag 10F of the 3rd embodiment, can make the allocation position of the exterior airbag 15 of inner balloon 20F when folding stable, thereby can successfully carry out folding operation.

In addition, as shown in the inner balloon 20G of the air bag 10G that uses among the airbag apparatus M4 of the 4th embodiment shown in Figure 28～31, also can be the time by the forming of sheeting 36G, the long LU of epipleura with flowing into between the leading section 26,26 of binding 2 wrist 23F, the 23B of opening 11 relative sides of inner balloon 20G is carried out length adjustment.In the 4th embodiment, corresponding with the departure distance OL of distance summit 22a, adjust the allocation position (with reference to Figure 28 B, C) of height adjustment suturing part 28, this summit 22a be with flow into opening 11 relative and away from the summit that flows into the opposed top 22 of using opening 11.By adjusting the allocation position of this suturing part 28, carry out the length adjustment of the long LU of epipleura.In addition,, can be adjusted at inner balloon 20G and expand when finishing, the increase and decrease (with reference to Figure 31) that the periphery of leading section 26, the 26 pushing exterior airbags 15 of wrist 23F, 23B breaks away from the thrust pressure PW of position 16a by the length adjustment of the long LU of epipleura.In addition, this inner balloon 20G uses the sheeting 36G of the diamond shaped identical with the sheeting 36C shown in Figure 18.

In addition, in the 4th embodiment, make sheeting 36G in conjunction with the time, shown in Figure 28 A, B, the overlapping outer peripheral edges 36a of the sheeting 36G of doubling is sewed up and combination mutually, be provided with in conjunction with edge (sutural margin) 39, thereby form inner balloon 20G.Then, shown in Figure 28 B, C, form longshore current go into the diametric(al) of opening 11 and along with the folding line VF1 of the invagination that combines edge 39 orthogonal directionss, flowing into opening 11 sides so that 2 overlapping modes of wrist 23F, 23B fold.At this moment, to relative and with opening 11 away from opposed top 22 sides that flow into usefulness opening 11 with the inflow of central portion 21, form folding line MF1, the MF2 of the outer folding that links to each other with the two ends of the folding line VF1 of invagination in the two edges side, fold so that inner balloon 20G becomes the state of flattening.Subsequently, on the position at opposed top 22, be provided with from the summit 22a at opposed top 22 and move and the stitching route of the linearity parallel, form the height adjustment suturing part 28 that forms is sewed up at overlapping position mutually with invagination folding line VF1 to invagination folding line VF1 lateral deviation.Then, shown in Figure 28 C, D, utilize to flow into opening 11,20G routs up with inner balloon, so that be disposed at the inner peripheral surface side of inner balloon 20G in conjunction with the tape edge 39a of edge (sutural margin) 39.In addition, shown in Figure 29 A, externally accommodate inner balloon 20G in the air bag 15.At this moment,, make the inflow of inner balloon 20G use the periphery of opening 11 overlapping, 2 wrist 23F, 23B longshore current are gone into the diametric(al) of opening 11 extend with the periphery of opening 11 and the inflow of exterior airbag 15 for inner balloon 20G.Subsequently, shown in Figure 28 D, will go into the diametric(al) configuration and the mounting of opening 11 in conjunction with edge 39 longshore currents and use opening 11 sides, and make inner balloon 20G to expanding with the direction that combines edge 39 quadratures and flattening in flowing into.Then, shown in Figure 28 E, form the folding line VF2 that goes into the invagination that combines edge 39 quadratures that the diametric(al) with opening 11 disposes with longshore current, fold opposed top 22, so that it is overlapped on the inner balloon 20G.Under this folding state, inner balloon 20G is housed in the exterior airbag 15.

In addition, the flow export 27 that is arranged at inner balloon 20G is configured to, be contained in that inner balloon 20G is flattened under the state in the exterior airbag 15, with linearity be line of centers IC in conjunction with edge 39, on the position of 2 wrist 23F, 23B, be provided with symmetry shape (line symmetry shape) respectively.In addition, under the situation of embodiment, 4 flow exports 27 with identical shaped circular open are set in inner balloon 20G, these flow exports 27 are on each wrist 23F, 23B, to be line of centers IC, with line symmetrical manner configuration (with reference to Figure 28 E, Figure 29 A) in conjunction with edge 39.

In addition, when in exterior airbag 15, accommodating inner balloon 20G, in advance retainer 41 is housed among the inner balloon 20G, make bolt 41a from each mounting hole 13 under the outstanding state in the outside of inner balloon 20G, in exterior airbag 15, accommodate inner balloon 20G, make bolt 41a each mounting hole 13 outstanding (with reference to Figure 30,31) from exterior airbag 15.

In addition, air bag 10G folds shown in Figure 29 A, B, C.Under the situation of the 4th embodiment, fold via following the 1st, 2 folding process.

In the 1st folding process, at first, shown in Figure 29 A, the folding opposed top 22 forming folding line VF2 overlaps under the state on the inner balloon 20G it, and inner balloon 20G is housed in the exterior airbag 15.In addition, the chaufeur sidewall portion 17 of exterior airbag 15 is overlapped the upper side of car body side wall portion 16 and flattening, is that the center flattens with air bag 10G to flow into opening 11.Then, shown in Figure 29 A, B, make two edges 10c, 10d with the air bag 10G that combines edge 39 quadratures of inner balloon 20, approaching to flowing into respectively with opening 11, so that fold with mode that the width dimensions of the air bag 10G that combines edge 39 quadratures reduces.Under the situation of the 4th embodiment, make in conjunction with edge 39 along disposing with the parallel line of centers IC of the fore-and-aft direction of opening 11 with inflow.Therefore, in the 1st folding process, so that the left border 10c of air bag 10G and right border 10d (in other words, the left border 15g of exterior airbag 15 and right border 15h) fold with opening 11 approaching modes to flowing into.In addition, under the situation of the 4th embodiment, carry out folding and folding position 10e, the 10f about forming of snake belly type, should about fold position 10e, 10f and be positioned in the chaufeur sidewall portion 17.In addition, particularly importantly, folding position 10e, the 10f of line of centers IC both sides is to be the center with line of centers IC, and be folding with the line symmetrical manner.Certainly, exterior airbag 15 is the center with line of centers IC also from before the 1st folding process, with about be respectively semi-circular shape the line symmetry shape flatten, can easily make the folding shape of finishing of folding position 10e, 10f become symmetry shape.

In the 2nd folding process, after the 1st folding engineering, make the two edges of the inner balloon 20G before the 1st folding process in conjunction with the air bag 10G on the direction of edge 39, approaching to flowing into respectively with opening 11, so that the mode that reduces along the width dimensions in conjunction with the air bag 10G of the direction of edge 39 folds.Under the situation of the 4th embodiment, to leading edge 10a and the trailing edge 10b (in other words, the leading edge 15d of exterior airbag 15 and trailing edge 15b) of air bag 10G, to fold with opening 11 approaching modes to flowing into.In addition, under the situation of the 4th embodiment, also folding in the 2nd folding process with front and back line symmetry shape.Specifically, will roll with opening 11 to the middle part of leading edge 10a or trailing edge 10b, so that the leading edge 10a mode relative with trailing edge 10b is configured in the top that flows into opening 11 from flowing into.Then,, finish the folding of air bag 10G if through the 2nd folding process, then with the 1st embodiment in the same manner, the air bag 10G after folding is carried on bearing circle.

In this airbag apparatus M4, when the air bag 10G when action expanded, inner balloon 20G expanded under the state that long and two-short dash line is represented in Figure 30,31, and is subsequently, flat following shown in solid line.When this inner balloon 20G expands, if height adjustment suturing part 28 is configured to and the summit 22a at opposed top 22 between departure distance OL increase, then the long LU of epipleura with flowing into between the leading section 26,26 of binding 2 wrist 23F, the 23B of opening 11 relative sides of inner balloon 20G shortens.Therefore, the leading section 26,26 of 2 wrist 23F, 23B when inner balloon 20G finishes expansion separately, so that the mode that its degree of crook diminishes, the direction along the periphery that pushes exterior airbag breaks away from position 16a is diminishing with the distance on the direction of the opening surface OP of opening 11 away from inflow.Its result expands when finishing at inner balloon 20G, the thrust pressure PW that the periphery of the leading section 26 pushing exterior airbags 15 of 2 wrist 23F, 23B breaks away from position 16a diminish (with reference to the long and two-short dash line of Figure 31).On the contrary, if height adjustment suturing part 28 is configured to reduce with the departure distance OL of the summit 22a at opposed top 22, then the long LU of epipleura with flowing into between the leading sections 26,26 of binding 2 wrist 23F, the 23B of opening 11 relative sides of inner balloon 20G is elongated.Therefore, the leading section 26 of 2 wrist 23F, 23B when inner balloon 20G finishes expansion separately, so that it is its degree of crook becomes big mode,, big with the distance change on the direction of the opening surface OP of opening 11 away from inflow along the direction that the periphery that pushes exterior airbag 15 breaks away from position 16a.Its result, when inner balloon 20G expansion was finished, the thrust pressure PW that the periphery of the leading section 26 pushing exterior airbags 15 of 2 wrist 23F, 23B breaks away from position 16a became big (with reference to the long and short dash line of Figure 31).

Therefore, in the inner balloon 20G of this airbag apparatus M4, even use identical sheeting 36G, also can be by adjusting the departure distance OL of height adjustment suturing part 28 and the summit 22a at opposed top 22, and easily adjust thrust pressure PW when crooked.

In addition, in the 4th embodiment, be configured in the inner peripheral surface side of inner balloon 20G in conjunction with the tape edge 39a of edge (sutural margin) 39.Therefore, when inner balloon 10G expands, be disposed at the tape edge 39a of the inner peripheral surface side of inner balloon 20G, can cover lignilite 14 and be not subjected to the expansion gases affect of High Temperature High Pressure, the lignilite 14 of inner balloon 20G and in conjunction with the breakage of edge (sutural margin) 39 in the time of can preventing to expand.

In addition, this inner balloon is routed up and prevent the structure of sutural margin breakage and form the structure of height adjustment suturing part also is applicable to the inner balloon of the 1st～3 embodiment.

In addition, in the inner balloon 20G of the 4th embodiment, in conjunction with edge 39 from leading section 26 sides of wrist 23F, 23B to central portion 21 sides, constitute (with reference to Figure 28 A, B) with linearity.In addition, inner balloon 20G is housed in the exterior airbag 15 with following collapsed shape when air bag 10G is folding.That is, the inflow of inner balloon 20G uses the periphery of opening 11 overlapping with the periphery of opening 11 and the inflow of exterior airbag 15, and 2 wrist 23F, 23B longshore currents go into the diametric(al) of opening 11 to extend.Then, will in conjunction with edge 39 longshore currents go into use the diametric(al) configuration of opening 11 and mounting in flow into use opening 11 sides on one side, make inner balloon 20G to expanding with the direction that combines edge 39 quadratures and flattening on one side.Then, form along with the folding line VF2 of the invagination of the direction that combines edge 39 quadratures that on the diametric(al) that flows into opening 11, disposes, folding opposed top 22 is housed in inner balloon 20G in the exterior airbag 15 (with reference to Figure 28 E, Figure 29 A) so that it overlaps on the inner balloon 20G.

In this structure, when air bag 10G was folding, inner balloon 20G externally in the air bag 15, to be the both sides of line of centers IC in conjunction with edge 39, flattened with the line symmetrical manner.Therefore, when folded airbag 10G, utilize the position of invagination folding line VF2 and make in conjunction with edge 39 not can to the skew of the direction of its quadrature, inner balloon 20G can symmetry and balancedly be configured in inflows in the exterior airbag 15 with around the opening 11.Its result, when air bag 10G expanded, inner balloon 20G can balancedly make and expand to go out to exterior airbag 15 effluents with gas G, and the periphery of pushing exterior airbag 15 breaks away from position 16a.In addition, in inner balloon 20G, make in conjunction with edge 39 from leading section 26 sides of wrist 23F, 23B, constitute with linearity to central portion 21 sides.Therefore, use the periphery of opening 11 overlapping in the inflow that makes inner balloon 20G with the periphery of opening 11 and the inflow of exterior airbag 15, to go into the diametric(al) configuration and the mounting of opening 11 in conjunction with edge 39 longshore currents on one side and use opening 11 sides in flowing into, make inner balloon 20G on one side when flattening with the direction expansion that combines edge 39 quadratures, can not relax near the opposed top 22, and be easy to make its flattening (with reference to Figure 28 D, E).In addition, by forming invagination folding line VF2, can easily opposed top 22 be folded on the inner balloon 20G.That is, in the inner balloon 20G of the 4th embodiment, inner balloon 20G self is flattened, and balancedly be disposed at operation in the exterior airbag 15, also can easily carry out.

In addition, when being configured in inner balloon 20G in the exterior airbag 15, shown in figure 32, extend in the diametric(al) that makes 2 wrist 23F, 23B longshore current go into usefulness opening 11, only will dispose in conjunction with the diametric(al) that edge 39 longshore currents are gone into opening 11 on one side, make inner balloon 20G with under the situation about flattening on one side, be difficult to balancedly be configured in the exterior airbag to mode with the direction expansion that combines edge 39 quadratures.That is, in this case, in the folding operation of air bag,, therefore, be difficult to balancedly be configured in the exterior airbag easily to being offset owing to lax (fold) X1 around it with the direction that combines edge 39 quadratures in conjunction with edge 39.In addition, as shown in figure 33, under the state that the diametric(al) that makes 2 wrist 23F, 23B longshore current go into usefulness opening 11 is extended, make on one side to flow into and flatten with opening 11 sides, form leading section 26, the 26 mutual invagination folding line VF3 that link on one side with 2 wrist 23F, 23B, and to folding in conjunction with edge 39 so that it overlaps under the situation on the inner balloon 20G with linearity, exterior airbag can't suitably expand.That is, in this case, the both sides at the invagination folding line VF3 position that the leading section with 2 wrist 23F, 23B links mutually, it is destroyed with the balance of gas inflow state to expand, its result, exterior airbag can't balancedly expand.

In addition, make 2 wrist 23F, the 23B longshore current goes into the diametric(al) of opening 11 to extend, to dispose in conjunction with the diametric(al) that edge 39 longshore currents are gone into opening 11 on one side, and mounting is in flowing into opening 11 sides, make inner balloon 20G along flattening on one side with the direction expansion that combines edge 39 quadratures, simultaneously, form the folding line VF2 that goes into the invagination that combines edge 39 orthogonal directionss that the diametric(al) with opening 11 disposes with longshore current, folding opposed top 22 and when making it overlap inner balloon 20G and go up, if in conjunction with edge 39 are linearities, then inner balloon 20G can stably be configured in the exterior airbag.Promptly, if in conjunction with edge 39 be for example the sheeting shown in Fig. 6 B 36 such from flowing into curve-like with opening 11 projectioies, then shown in content in Figure 34 C bracket, during folding opposed top 22, can form lax X2 in its vicinity at the folding line VF2 that forms invagination.In this case, can cause in the airbag fold process in conjunction with edge 39 out-of-position problems, can't be with stable collapsed shape configuration inner balloon 20G in the air bag externally.Therefore, shown in the 4th embodiment, overlapping outer peripheral edges 36a is mutually combined sheeting 36G doubling, forming under the situation of inner balloon 20G, preferred combination edge 39 to central portion 21 sides, constitutes linearity from leading section 26 sides of wrist 23F, 23B.

In addition, especially, in the 4th embodiment, shown in Figure 29 A, B, C, air bag 10G is folded with the 1st, 2 folding process of regulation, in the 1st folding process, being line of centers IC, folding and form folding position 10e, 10f with the form of line symmetry in conjunction with edge 39.If folded airbag 10G so then when air bag 10G expands, with the operation roughly opposite with folding process, eliminates folding and makes air bag 10G launch to expand.That is, when air bag 10G launched to expand, at first inner balloon 20G finished expansion under the state that 2 wrist 23F, 23B are launched, and eliminated the folding of the 2nd folding process.Then, eliminate the folding of the 1st folding process.At this moment, the 1st folding process folding be with inner balloon 20G be line of centers IC in conjunction with edge 39, folding position 10e, the 10f of both sides is folded into the line symmetry shape.In addition, flow out the flow export 27 that expands with the inner balloon 20G of gases to exterior airbag 15, with linearity be line of centers IC in conjunction with edge 39, be arranged on 2 wrist 23F, the 23B with the line symmetry shape respectively.Therefore, in conjunction with left and right edges 15g, the 15h side of the exterior airbag on the orthogonal directions of edge 39 15, eliminate folding equably and the expansion expansion.Therefore, folding combination by configuration inner balloon 20G self and flow export 27 and air bag in above-mentioned exterior airbag 15, when air bag 10G launches to expand, can make air bag 10G use the diametric both sides of opening 11 (under the situation of embodiment to inflow, both sides to the left and right), launch equably to expand.Promptly, in the 4th embodiment, air bag 10G just expanded finished before air bag 10G outer peripheral edges while launch to become big, when expanding than heavy back, inflow with air bag 10G is that two edges 10c, the 10d side (with the two edges 10c that combines the air bag 10G on edge 39 orthogonal directionss, the 10d side of inner balloon 20G) that the center is the line symmetry can not be offset with opening 11, and launch equably to expand, the air bag 10G that expands can stably prop up and move the chaufeur of coming in the zone of regulation.

Especially, under the situation of the 4th embodiment, make in the 1st folding process, become the left and right edges 10c, the 10d that expand when finishing along the left and right vehicle wheel direction near the two edges that flow into the air bag 10G of opening 11.Therefore, while air bag 10G just expanded finished before the outer peripheral edges of air bag 10G launch to become big, when expanding than heavy back, the left and right edges 10c of air bag 10G, 10d side, the lateral deviation in can be is not to the left and right moved, but expansion expansion equably to the left and right.Therefore, if air bag in advance 10G be redefined for and make the protection zone of left and right directions have surplus, even the chaufeur that then props up is offset to the left and right, also can stably protect this chaufeur.

In addition, in the 4th embodiment,, show carry out the folding situation of snake belly type in conjunction with the two edges 10c on the orthogonal directions of edge 39,10d side for folding in the 1st folding process.But, as long as folding position 10e, the 10f of two edges 10c, 10d side are to be line of centers IC and symmetrically in conjunction with edge 39, then also can adopt the takeup type of rolling from edge 10c, 10d side folding, or the takeup type as Figure 29 B bracket shown in is folding and the folding irregular takeup type that mixes of snake belly type such as folds at multiple folding mode.

In addition, in the 2nd folding process, also can be as shown in Figure 29 C bracket, adopt multiple folding modes such as irregular takeup type is folding.

In addition, in the 4th embodiment, the doubling with sheeting 36G is shown, overlapping outer peripheral edges 36a is mutually combined after, shown in Figure 28 C, D, rout up and be provided with the situation of height adjustment suturing part.But, also can be shown in Figure 34 A～C, do not rout up, or the height adjustment suturing part is set, but make 2 wrist 23F, the 23B longshore current goes into the diametric(al) of opening 11 to extend, to dispose in conjunction with the diametric(al) that edge 39 longshore currents are gone into opening 11 on one side, and mounting is in flowing into opening 11 sides, make inner balloon 20G along flattening on one side with the direction expansion that combines edge 39 quadratures, simultaneously, form with longshore current and go into the invagination folding line VF2 that combines edge 39 quadratures that the diametric(al) with opening 11 disposes, fold opposed top 22 and it is overlapped on the inner balloon 20G, thereby inner balloon 20G is housed in the exterior airbag.

In addition, the method for folding of the inner balloon 20G of the 4th embodiment and air bag 10G, except being used for airbag apparatus M4 that bearing circle uses, also be applicable to the co-pilot seat airbag apparatus M2 of the 2nd embodiment, and the 3rd embodiment that combines with exterior airbag 15 of the top 26a that makes the leading section 26 of inner balloon 20F, perhaps aftermentioned the 5th embodiment.

In addition, under the situation of airbag system for steering wheel, also can constitute the air bag 10H of the airbag apparatus M5 of the 5th embodiment shown in Figure 35～37.The inner balloon 20H of this air bag 10H has 2 wrists 23, front side wrist 23F and the rear side wrist 23B that extends along fore-and-aft direction when expansion is finished.The constituted mode of front side wrist 23F and rear side wrist 23B is, expands when finishing at inner balloon 20H, cross the anterior RF of ring portion R and rear R B upper surface PR and forwards, backwards both sides extend.In addition, exterior airbag 15H is configured in the upper surface side of the huckle DT of the chaufeur D that occupies driver's seat DS when expansion is finished, and simultaneously, the huckle DT pushing portion 18 that moves upward that can limit the chaufeur D that takes a seat is set in trailing edge 15b side.

In addition, this exterior airbag 15H is bigger than the exterior airbag 15 of the 1st embodiment, when expansion is finished, covers the upper surface side of ring portion R, with the outside dimension discoideus expansion bigger than the diameter dimension of ring portion R.In addition, the outside dimension of exterior airbag 15H forms, and makes trailing edge side lower surface 15c side contact (with reference to Figure 36 B) with the upper surface side of the huckle DT of the chaufeur D that occupies driver's seat DS.In addition, in inside except inner balloon 20H, with air bag 15 similarly, 2 not shown root system bands are set, thus the thickness when restriction exterior airbag 15H expands.

In addition, the inner balloon 20D shown in inner balloon 20H and Figure 21 similarly with the sheeting 36D of the flattening shown in Figure 20 bending, sews up the regulation position mutually and forms three-dimensional shape.But inner balloon 20H is corresponding with exterior airbag 15H, and is bigger than the inner balloon 20D shown in Figure 21.In addition, inner balloon 20H is arranged in the exterior airbag 15H, and the length dimension OL of the fore-and-aft direction when the length dimension IL of the fore-and-aft direction when finishing that expands and the expansion of exterior airbag 15H are finished is (with reference to Figure 37 B) about equally.Therefore, finish if expand, the top 26a of each leading section 26 of front side wrist 23F and rear side wrist 23B then, push leading edge 15d and the trailing edge 15b of exterior airbag 15H in the mode of depressing downwards, so that the front edge side lower surface 15e of exterior airbag 15H (periphery breaks away from position 16a) and trailing edge side lower surface 15c (periphery breaks away from position 16a) and the anterior RF of ring portion R and the upper surface PR side butt (with reference to Figure 35,36) of rear R B.

The airbag apparatus M5 of the 5th embodiment and the 1st embodiment similarly carry on vehicle.In addition, when airbag apparatus M5 moves, if expand with gas G via flowing into inflow air bag 10H with opening 11, then air bag 10H expands and pushes the 50a of door portion, the 50a of air cell covering 49 open, air bag 10H is shown in Figure 35 A, B, from outstanding, finish expansion in the mode of the upper surface PR side that covers ring portion R as the housing 45 of accommodating the position.

At this moment, at the expansion initial stage of air bag 10H, shown in Figure 35 A, B and Figure 37 A, expand and flow into inner balloon 20H from flowing into opening 11 with gas G, make inner balloon 20H finish expansion, then, shown in Figure 36 A, B and Figure 37 B, expand and use the gas G flow export 27 inflow exterior airbag 15H of air bag 20H internally, make exterior airbag 15H finish expansion.

In addition, the air bag 10H when expanding, the pushing portion 18 of the trailing edge 15b side of exterior airbag 15H is configured in the upper surface side of the huckle DT of the chaufeur D that takes a seat.Therefore, shown in Figure 36 B, even the chaufeur D that takes a seat moves and waist is lifted, because the huckle DT that pushing portion 18 can limit chaufeur D moving upward, thereby the waist that can limit as chaufeur D lifts wait forwards mobile.

In addition, the constituted mode of inner balloon 20H is, shown in Figure 35 B, Figure 36 A, make expand flow into gas G and keep expansion finish shape during, push the both sides of anterior RF and the rear R B of ring portion R downwards.Therefore, for exterior airbag 15H, if inner balloon 20H finishes expansion, then pushing portion 18 can be easily launches between the belly DB of the rear R B of ring portion R and chaufeur D.In addition, shown in Figure 36 A, B, utilize the expansion of exterior airbag 15H self, can with pushing portion 18 stably, the state that expands can limit huckle DT to be moved upward, be configured on the upper surface position of huckle DT of chaufeur D.In addition, this to ring portion R rear R B and the belly DB of chaufeur D between launch the state of configuration pushing portion 18, with be provided with in the air bag 15H externally as utilize the situation that disposes the inner balloon such as rectification cloth of pushing portion 18 with flowing of gas G that expands to compare, have following advantage.That is, in the inner balloon 20H of present embodiment, the pushing portion 18 by supports outer air bag 15H directly and channeling conduct are such overhangs action, can launch pushing portion 18 reliably.In addition, the expansion of the exterior airbag 15H self by subsequently can be guaranteed stably to limit the state that the huckle DT of chaufeur D is moved upward by pushing portion 18.

In addition, for inner balloon 20H, not only rear side wrist 23B pushes, and front side wrist 23F also pushes the upper surface PR side of the anterior RF side of ring portion R.Therefore, exterior airbag 15H suppresses to the left and right expansion by inner balloon 20H, weakens the pushing of keeping straight on when handling to the wrist DA of chaufeur D, makes leading edge 15d side and trailing edge 15b side balancedly launch to expand simultaneously.Therefore, the pushing portion 18 of the trailing edge 15b side of exterior airbag 15H can stablize, successfully dispose between the belly DB of the rear R B of ring portion R and chaufeur D.

Therefore, by the airbag apparatus M5 of the 5th embodiment, move in the place ahead can to suppress reliably that waist as chaufeur D lifts etc., can prevent chaufeur D moving to Windshield WS side.

In addition, in the 5th embodiment, the rear side wrist 23B of inner balloon 20H constitutes, the zone that move the top that makes the rear end 26ab side that expands when finishing be configured in the huckle DT that can limit chaufeur D.Therefore, when the inner balloon 20H at air bag (exterior airbag 15H) 10H expansion initial stage expansion is finished, shown in Figure 35 B, Figure 36 A, under the state that is pushed by inner balloon 20H, the pushing portion 18 of exterior airbag 15H can limit the top of the huckle DT of chaufeur D and move.Its result, before even externally the expansion of air bag 15H is finished, as long as inner balloon 20H finishes expansion, air bag 10H just can utilize the rear end 26ab side of inner balloon 20H, guarantees the state that move top that the pushing portion 18 by exterior airbag 15H limits the huckle DT of chaufeur D.

In addition, if do not consider this point, even the rear side wrist 23B of inner balloon 20H then, do not extend to the zone that move the top of the huckle DT that can limit chaufeur D, also shown in the long and two-short dash line of Figure 35, as long as it is just passable to have the length dimension of upper surface PR side of the rear R B that can push ring portion R.In this case, when inner balloon 20H expands, the pushing portion 18 of exterior airbag 15H directly can be supported and guide between the belly DB of the rear R B of ring portion R and chaufeur D.

In addition, under the situation of the 5th embodiment, the constituted mode of inner balloon 20H is, when expansion is finished, extend in the mode that disposes the zone of moving to the top that can limit the huckle DT of chaufeur D, the length dimension OL of the fore-and-aft direction when simultaneously, the expansion of the length dimension IL of fore-and-aft direction and exterior airbag 15H being finished about equally.Therefore, when exterior airbag 15H expands after inner balloon 20H expansion is finished, front side wrist 23F by inner balloon 20H and rear side wrist 23B are to the pushing of ring portion R side, shown in Figure 36 A, B and Figure 37 A, B, the front portion of exterior airbag 15H (leading edge) 15d side and rear portion (trailing edge) 15b side, the state that becomes the upper surface PR side contacts of the anterior RF that makes front edge side lower surface 15e and trailing edge side lower surface 15c and ring portion R and rear R B and can not lift can balancedly expand simultaneously and suppresses outstanding to the part of chaufeur D side.

Certainly, the inner balloon 20H of the 5th embodiment also can constitute, with the inner balloon 20 of the 1st embodiment similarly, when the inflow that expansion is fixed from periphery with gas G makes inner balloon 20H finish expansion separately with opening 11 inflows, than flow into the opening surface of opening 11 more by under the position on, dispose each top 26a of the leading section 26 of described wrist 23F and rear side wrist 23B.Therefore, inner balloon 20H when expansion is finished, can press front side wrist 23F and rear side wrist 23B to ring portion R thruster forcefully, can make the trailing edge 15b side of exterior airbag 15H pushing portion 18, and the deployed condition of the leading edge 15d side of exterior airbag 15H between balance well, more rapidly and easily between the belly DB of the rear R B of ring portion R and chaufeur D, launch.

In addition, in the 5th embodiment, show the situation that forms inner balloon 20H three-dimensionally, but shown in inner balloon 20 that also can be shown in Fig. 7,28, the 20G, adopt following method, that is, make two ends be 1 piece of sheeting 36,36G of the thin shape of front end so that the overlapping mode doubling in two edges of the short direction of length, and sew up overlapping outer peripheral edges.

In addition, in the 5th embodiment, observing air bag 10H inflated configuration from the top is circular, but also as shown in Figure 38 shown in the exterior airbag 15I of air bag 10I, the little shape of width dimensions for the left and right directions that makes exterior airbag 15H becomes the elongated oval shape of fore-and-aft direction.In this exterior airbag 15I, also the trailing edge 15b side when expansion is finished disposes pushing portion 18, to dispose the zone of moving to the top that can limit the huckle DT of chaufeur D.

In addition, in the 5th embodiment, also can be shown in the 3rd embodiment, near top 26af, the 26ab with the front side wrist 23F of inner balloon 20H and rear side wrist 23B, when the outer peripheral edges of car body side wall portion 16 that makes exterior airbag 15H and chaufeur sidewall portion 17 mutually combine, the common stitching.

In addition, shown in the air bag 10J of the airbag system for steering wheel M6 of the 6th embodiment as shown in Figure 39, also can be not only near the 26a of the top of leading section 26, and, inner balloon 20J is combined with exterior airbag 15J by sewing up to wait from extremely flowing near the top 26a of wrist 23 with near the opening 11.Certainly, this inner balloon 20J is when expansion is finished, and wrist 23,23 expands with the thin bag shape of front end, becomes the shape of the periphery disengaging position 16a that can push exterior airbag 15J.Under the situation of legend, inner balloon 20J is identical with the inner balloon 20 of the 1st embodiment.In addition, this inner balloon 20J uses lignilite 14 to sew up with linearity between the wrist 23,23, and combines with exterior airbag 15J on the downside perisporium 30 that flows into opening 11 sides.In this structure, when inner balloon 20J expands, move with respect to the skew of exterior airbag 15J and to be restricted.But inner balloon 20J is on the long linearity zone between 2 wrists 23, and 15J combines with exterior airbag, when air bag 10J is folding, can folds and can not be offset mobile fully inner balloon 20J.

In addition, moving for the skew that can prevent inner balloon 20J when folding, and make between 2 wrists of inner balloon with structure that exterior airbag combines in, also can be the structure shown in the air bag 10K of the airbag system for steering wheel M7 of the 7th embodiment shown in Figure 40,41.In this inner balloon 20K, with the downside perisporium 30 of the shared inflow of exterior airbag 15K with opening 11 sides.Under the situation of legend, in this inner balloon 20K, the outer peripheral edges 36a that makes sheeting 36K is to dispose around the inflow of the exterior airbag 15K mode with opening 11, and by utilizing lignilite 14 stitchings etc., 15K combines with exterior airbag.Certainly, in this inner balloon 20K, when expansion is finished, upside perisporium 29 side direction below pushing downside perisporium 30 sides that significantly expand upward.That is, the wrist 23,23 of inner balloon 20K expands with the thin shape of front end, and the periphery that pushes the exterior airbag 15K of shared downside perisporium 30 breaks away from position 16a.Its result in this air bag 10K, also can make periphery disengaging position 16a lift from the periphery of accommodating the position and be suppressed, and exterior airbag 15K is expanded.

In addition, inner balloon is combined with exterior airbag, perhaps, the outer peripheral edges that make sheeting in order to form inner balloon in conjunction with the time, except using lignilite 14, can certainly use lining cement to carry out combination.In addition, for example when general inner balloon 20J as shown in figure 39 engages with exterior airbag 15J, also can be engage, but not damaging the degree that the pushing periphery breaks away from the effect of position 16a, the roughly whole surface of downside perisporium 30 sides is engaged with exterior airbag 15J with linearity.

Claims (20)

1. airbag apparatus, it constitutes has air bag, this air bag is expanding when flowing into gas, from be folded accommodate to accommodate the position outstanding and finish expansion,

Described air bag constitutes, and is installed in described accommodate position on the inflow of gas with the periphery of opening with expanding, and has simultaneously: exterior airbag, and it constitutes the periphery wall of described air bag; And inner balloon, it is configured in the described exterior airbag with the mode of opening to cover described inflow,

Described inner balloon has flow export, and it makes via described inflow to go out to described exterior airbag effluent with gas with the expansion that opening flows into,

It is characterized in that,

Described inner balloon constitutes the wrist with bag shape, its when expansion is flowed into gas, from described accommodate the position outstanding and along with the axially roughly direction of the quadrature extension and expand of described inflow with opening,

Described wrist constitutes, described inner balloon when the action of described airbag apparatus keep expand finish shape during, utilization is away from the front position of described inflow with opening, the described inflow that pushes described exterior airbag to described peripheral side of accommodating the position is accommodated the periphery that the position breaks away from and is broken away from the position from described with the opening periphery, and, keep the pushing state.

2. airbag apparatus according to claim 1 is characterized in that,

Described flow export is configured on the described wrist.

3. airbag apparatus according to claim 2 is characterized in that,

The flow export of described inner balloon is configured to, under the state when described inner balloon expansion is finished, make the direction of the expansion of outflow with gas, be in from the described front position of described inner balloon to described direction of the accommodating position peripheral side pushing direction of quadrature roughly, to the angular range between the direction opposite, to prevent moving of described wrist with press direction.

4. according to any described airbag apparatus in the claim 1 to 3, it is characterized in that,

The described wrist of described inner balloon is configured to, at least except the front of described wrist, from the inner peripheral surface separation of described exterior airbag.

5. airbag apparatus according to claim 1 is characterized in that,

The described wrist of described inner balloon is configured to, and makes front break away from the position with the described periphery of described exterior airbag and combines.

6. airbag apparatus according to claim 1 is characterized in that,

Described inner balloon constitutes, when the described inflow that expansion is fixed from periphery with gas makes described inner balloon finish expansion separately with the opening inflow, break away from the direction at position and on the position below more leaning on the opening surface of opening than described inflow, dispose the leading section of described wrist at periphery along the described exterior airbag of pushing.

7. airbag apparatus according to claim 6 is characterized in that,

Described inner balloon constitutes, and described wrist constitutes by 2, and its configuration mode is, when expansion was finished, from the central portion that expands with the position of opening in described inflow, along the diametric(al) of described inflow with opening, the mode that attenuates with front end extended to front,

Flow into opening and described inner balloon finished separately under the state of expansion in the described inflow that is fixed from periphery with gas of expanding,

Described flow export is configured in than the leading section of described each wrist of described inner balloon more by described inflow with on the position of open side, so that the perisporium of the leading section of described each wrist of described inner balloon expands,

And, under the state of observing with the direction of the bearing of trend quadrature of 2 described wrists, making with described inflow is convex form with the crest line between the leading section of 2 described wrists of binding of the relative side of opening, simultaneously, make long with described inflow with the film between the leading section of 2 described wrists of binding of the relative side of opening, longer than described inflow with the film between the leading section of 2 described wrists of binding of open side.

8. airbag apparatus according to claim 1 is characterized in that,

Described inner balloon has flexible sheeting three-dimensionally in conjunction with forming by making.

9. airbag apparatus according to claim 7 is characterized in that,

Described inner balloon constitutes, and by having 1 piece of flexible sheeting doubling, the outer peripheral edges of overlapping flattening are mutually combined and form,

The generation type of described sheeting is, the doubling folding line when described inner balloon forms is configured in described inner balloon and expands when finishing described inflow with on the position between the leading section of 2 described wrists of binding of open side,

And, outer peripheral edges separately in conjunction with edge, expanding as described inner balloon constitutes with the position between the leading section of 2 described wrists of binding of the relative side of opening with described inflow when finishing,

Simultaneously, the shape after the flattening is become, from the central portion that forms described central portion with the position to the front end of the wrist that forms described each wrist with the position, the shape that diminishes with the width dimensions of the direction of the folding line quadrature of described doubling.

10. airbag apparatus according to claim 9 is characterized in that,

The generation type of described inner balloon is, forms by sewing up described sheeting, simultaneously, described tape edge in conjunction with edge is configured in the inner peripheral surface side of described inner balloon.

11. according to claim 9 or 10 described airbag apparatus, it is characterized in that,

Described inner balloon constitutes, makes described sheeting doubling and each other described of the outer peripheral edges of combination in conjunction with edge, and be linearity from leading section side to the described central portion side of described wrist,

When described airbag fold, 2 described wrists are extended with the diametric(al) of opening along described inflow, on one side with described in conjunction with edge along described inflow with the diametric(al) configuration of opening and mounting in described inflow open side, make described inner balloon along expanding with the described direction that combines the edge quadrature and flattening on one side

Simultaneously, form the folding line of invagination with the described direction that combines the edge quadrature of the diametric(al) configuration of opening by edge and described inflow, relative and fold away from the opposed top of described inflow with opening with opening with described inflow to described central portion is so that it overlaps on the inner balloon

Then described inner balloon is housed in the described exterior airbag.

12. airbag apparatus according to claim 11 is characterized in that,

Folding the constituting of described air bag has:

The 1st folding process, this operation is under the state that described inner balloon is housed in the described exterior airbag, be after the center flattens with described inflow opening, make the described two edges that combine the described air bag of edge quadrature with described inner balloon, near described inflow opening, reduce respectively and make with the described width dimensions that combines the described air bag of edge quadrature; And

The 2nd folding process, this operation is through behind the 1st folding process, make the described two edges of the described inner balloon before described the 1st folding process in conjunction with the described air bag on the direction of edge, approaching to described inflow respectively with opening, reduce and make along the width dimensions of described described air bag in conjunction with the edge direction

Combine both sides folding of edge quadrature in described the 1st folding process with described inner balloon described, in conjunction with edge being center and symmetry,

Being arranged at the described flow export of described inner balloon, is the center with the described of linearity that described inner balloon is flattened under the state that is housed in the described exterior airbag in conjunction with edge, is arranged on symmetrically respectively on 2 described wrists.

13. airbag apparatus according to claim 12 is characterized in that,

In described the 1st folding process,, be when expansion is finished along the left and right edges on the left and right directions of vehicle to the two edges of described inflow with the approaching described air bag of opening.

14. airbag apparatus according to claim 9 is characterized in that,

Described inner balloon constitutes, forms by sewing up described sheeting,

Be provided with simultaneously:

In conjunction with edge, it is sewed up outer peripheral edges and combination mutually by the described sheeting of doubling; And

The height adjustment suturing part, it is adjusted at described inner balloon and expands separately when finishing, and uses the allocation position of the opening surface of opening along the leading section of 2 described wrists of the direction at the periphery disengaging position of the described exterior airbag of pushing from described inflow,

The generation type of described height adjustment suturing part is:

Along diametric(al) and the edge and the described folding line that combine the direction formation invagination of edge quadrature of described inflow with opening, in described inflow open side, make 2 described wrists overlapping, relative and with opening to described central portion simultaneously away from described inflow opposed top side with opening with described inflow, form the folding line of the outer folding that links to each other with the two ends of described invagination folding line in the two edges side

Become and will be provided with the state that described inner balloon in conjunction with edge flattens,

By on the position at described opposed top, be provided with from the summit at described opposed top to described invagination folding line lateral deviation and move and the stitching route of the linearity parallel with described invagination folding line, form the height adjustment suturing part.

15. airbag apparatus according to claim 1 is characterized in that,

It constitutes as airbag system for steering wheel, this bearing circle has ring portion, the hub portion of controlling when handling that is disposed at these ring portion central authorities and connects described ring portion and the spoke portion of described hub portion, this airbag system for steering wheel is with the position of accommodating as the described air bag after folding, the top of described hub portion

Described inner balloon constitutes, and when the described inner balloon when the action of described airbag apparatus expanded and finishes, the leading section configuration that makes described wrist was until the position of the upper surface side of crossing described described ring portion of accommodating the position periphery.

16. airbag apparatus according to claim 15 is characterized in that,

Described inner balloon constitutes has 2 described wrists that extend along fore-and-aft direction with opening from described inflow.

17. airbag apparatus according to claim 16 is characterized in that,

Expand when finishing in described inner balloon, 2 wrists that extend along fore-and-aft direction are front side wrist and rear side wrist, and the both sides mode of extending constitutes forwards, backwards with the upper surface of the front and rear of crossing described ring portion,

The described exterior airbag of described air bag is configured in the upper face side of the huckle of the chaufeur that takes a seat when expansion is finished, simultaneously, have the pushing portion that the huckle of the chaufeur that restriction takes a seat is moved upward in the trailing edge side of described exterior airbag.

18. airbag apparatus according to claim 17 is characterized in that,

The rear side wrist of described inner balloon constitutes, and makes the rear end side that expands when finishing be configured in the zone that is moved upward until the huckle that limits chaufeur.

19. airbag apparatus according to claim 18 is characterized in that,

The length dimension of the fore-and-aft direction the when expansion of described inner balloon is finished, the length dimension of the fore-and-aft direction when finishing with the expansion of described exterior airbag about equally.

20. airbag apparatus according to claim 1 is characterized in that,

It is describedly accommodated the co-pilot seat that the position is disposed on the instrument carrier panel position and constitutes with airbag apparatus as what will be folded the described air bag of accommodating,

Described inner balloon constitutes, and the described inner balloon when described airbag apparatus moves expands when finishing, and the leading section of described wrist is configured in until crossing described position of accommodating the instrument carrier panel face side of position periphery.

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