CN100379611C - Airbag apparatus and airbag folding method - Google Patents
Airbag apparatus and airbag folding method Download PDFInfo
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- CN100379611C CN100379611C CNB2005100984675A CN200510098467A CN100379611C CN 100379611 C CN100379611 C CN 100379611C CN B2005100984675 A CNB2005100984675 A CN B2005100984675A CN 200510098467 A CN200510098467 A CN 200510098467A CN 100379611 C CN100379611 C CN 100379611C
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- air bag
- socket
- holding element
- cloth sheet
- fold line
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Abstract
An airbag apparatus according to the present invention includes a gas generator and an airbag. The airbag includes a panel sheet and a recess defined inwardly with respect to the airbag. The airbag is formed in a bag-like shape by folding the panel sheet in two and sewing the circumference of the panel sheet. The panel sheet has a first folding line and an inward folding portion including a line extending from the first folding line and arranged in a circumferential portion of the panel sheet. The inward folding portion includes a second folding line by which the inward folding portion is defined, a third folding line extending along the line extending from the first folding line, and an insertion opening through which the gas generator is inserted into the airbag. The recess is provided by folding the inward folding portion along the second folding line inwardly with respect to the airbag, re-folding the airbag in two along the third folding line, and sewing the circumference of the inward folding portion together with the circumference of the panel sheet.
Description
Technical field
The present invention relates to airbag apparatus and the method for folding that is used for air bag, response is applied to the collision that surpasses predeterminated level on the vehicle body, and this air bag is opened and inflated around the occupant, thereby reduces to act on occupant's collision.
Background technology
Usually, airbag apparatus comprises gas generator and air bag, by the gas that gas generator produced airbag inflation is launched.Gas generator has the aerator that is used to produce gas, and the holding element that is used for fixing aerator.Depend on the position that air bag is installed, air bag can be configured as different patterns.For example, Japanese patent gazette No.2001-114060 has disclosed a kind of side air bag device that comprises flat air bag.By with the doubling of cloth sheet, and cloth sheet periphery sewed up, thereby form the air bag of cryptomere.
In airbag apparatus, launch in order to make airbag inflation with gas, the aerator of gas generator must be arranged in the air bag at least.For this purpose, make air bag according to following steps.At first,, aerator is inserted into the peripheral part of the socket in the air bag, sews up except being defined as with the periphery of cloth sheet.Then, by this socket, aerator is installed in the air bag.Subsequently, will unite by a seam with cooresponding part of socket or the unstitched part of air bag periphery.Make the socket sealing thus.
Gas generator is installed in the air bag, such as aerator and holding element are injected air bag, and electric wiring is connected with aerator etc.,, must make socket relatively large for making above-mentioned installation facility more.Make socket as seen from the air bag side.Therefore, if socket stays open, when airbag inflation launched, excessive gas just may leak from spigot.In the case, airbag aeration can not be reached predetermined internal pressure.For fear of this kind situation, air bag, particularly platypelloid type air bag after the stitching step of cloth sheet, must carry out the post-processing to socket.In post-processing, by sewing up and the corresponding air bag peripheral part of socket, can make the socket sealing or reduce size, perhaps can be with the socket shutoff by the folding and corresponding air bag peripheral part of socket.
That is the manufacturing of flat air bag needs three steps: sew up the periphery of cloth sheet, gas generator is installed, and is carried out post-processing.The production efficiency of air bag is therefore relatively low.In addition, although aerator is contained in the air bag, must be outside socket reaches air bag with electric wiring.Therefore, even after post-processing, the part of socket is stayed open, it may make gas leak from opening portion.Therefore, flat air bag open and air bag after, be difficult to keep internal pressure.In addition, in post-processing,, sew up the peripheral part of corresponding socket near near electric wiring, just may take place such as the damage electric wiring or make the electric wiring problem of short-circuit if in order to seal socket to greatest extent.
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of airbag apparatus and air bag method for folding, be used for behind airbag aeration, eliminate the excess air that causes because of socket and leak.
In order realizing above-mentioned and other purposes, and, to the invention provides a kind of airbag apparatus, to comprise the gas generator and the air bag that are used to produce gas, when making gas generator work, airbag inflation is launched by gas according to purpose of the present invention.This air bag comprises socket, by this socket gas generator is inserted in the air bag.Gas generator comprises the part of stretching out to the outside from air bag by socket, makes spigot seal by this part.
In addition, the invention provides a kind of folded airbag method that is used for airbag apparatus, this airbag apparatus comprises and is used to produce the aerator that gas launches airbag inflation, and the holding element that is used to hold aerator.By this holding element, airbag apparatus is fixed on the holding portion that is provided with in the automotive occupant chamber.This method comprises: the air bag of preparation flattening form, and the socket that holding element passes therethrough is set; The part of holding element is stretched out from socket, and the open end of holding element and socket is kept in touch, by by this way holding element being passed the socket of air bag, thereby set at least one contact point; Set at least one fold line from contact point, and along the fold line folded airbag; And to holding element airbag fold is become folded state from the far-end of air bag.
Via the example explanation to the principle of the invention, according to the description of doing below in conjunction with accompanying drawing, other aspects of the present invention and advantage will be more clear.
Description of drawings
With reference to the detailed description of hereinafter in conjunction with the accompanying drawings preferred implementation being carried out, can understand the present invention and purpose and advantage best, wherein:
Figure 1A is the lateral plan of expression according to the first embodiment of the invention air bag;
Figure 1B is the cutaway view along 1B-1B line among Figure 1A;
Fig. 1 C is the cutaway view along 1C-1C line among Figure 1A;
Fig. 2 is the lateral plan of expression side air bag device;
Fig. 3 is the cutaway view of expression side air bag device;
Fig. 4 is the transparent view of expression holding element;
Fig. 5 is the lateral plan that is illustrated in cloth sheet under the deployed condition;
Fig. 6 is the lateral plan that is shown in cloth sheet in the folding step;
Fig. 7 A is the recessed upward view of expression side air bag;
Fig. 7 B is the recessed back view of expression side air bag;
Fig. 8 is the cutaway view of expression air bag main portion;
Fig. 9 is the lateral plan of expression according to the side air bag device of second embodiment of the invention;
Figure 10 is the cutaway view of expression side air bag device part;
Figure 11 is the transparent view of expression side air bag device part;
Figure 12 A is the lateral plan of expression side air bag device;
Figure 12 B is the lateral plan of expression side air bag main portion;
Figure 13 A is expression first folding step lateral plan of side air bag device afterwards;
Figure 13 B is expression second folding step lateral plan of side air bag device afterwards;
Figure 14 A is and the corresponding lateral plan of Fig. 5 to be illustrated in the first improvement cloth sheet under the deployed condition;
Figure 14 B is and the corresponding lateral plan of Figure 1A that expression first improves air bag;
Figure 15 is and the corresponding lateral plan of Figure 1A that expression second improves air bag;
Figure 16 is and the corresponding lateral plan of Fig. 5 to be illustrated in the second improvement cloth sheet under the deployed condition;
Figure 17 A is and the corresponding lateral plan of Figure 12 A to represent that the 3rd improves air bag;
Figure 17 B is and the corresponding lateral plan of Figure 12 B to represent that the 3rd improves the main portion of air bag;
Figure 18 A is and the corresponding lateral plan of Figure 12 A to represent that the 4th improves side air bag device;
Figure 18 B is and the corresponding lateral plan of Figure 12 B to represent that the 3rd improves the main portion of side air bag device;
Figure 19 A is and the corresponding transparent view of Figure 11 to represent that the 5th improves the transparent view of side air bag device main portion; And
Figure 19 B is and the corresponding lateral plan of Figure 12 B to represent that the 6th improves side air bag device.
The specific embodiment
Now, with reference to Figure 1A to Fig. 8, first embodiment of the present invention is described.
Fig. 2 is illustrated in the left side front chair 10 that is provided with among the crew department.Front chair 10 comprises seat part 11 and backrest 12.Case 13 is limited to the left part of backrest 12, and side air bag device 20 is contained in wherein.With side air bag device 20 and unshowned car door positioned opposite, this car door forms the part of body side.Although only show left side front chair 10 in the drawings, also be provided with the right side front chair, and the device identical with side air bag device 20 is installed on the backrest of right side front chair.
As shown in Figures 2 and 3, side air bag device 20 comprises gas generator 21 and the air bag 22 that is used to produce gas.The gas that is produced by gas generator 21 launches air bag 22 expansions.Gas generator 21 comprises: tubular aerator 23, and gas therefrom flows out; And holding element 24, be used for aerator 23 and air bag 22 are fixed in case 13.
When the collision that exceeds predetermine level was applied to vehicle body side, the aerator 23 of side air bag device 20 was emitted gas to air bag 22, thereby air bag 22 expansions are launched.When watching from the side, air bag 22 has elliptical shape.When expanding, air bag 22 stretches along the fore-and-aft direction of vehicle, and to following back, a side that will sit in occupant P health on the front chair 10 covers from shoulder.Under the normal circumstances, air bag 22 is contained in the case 13 with the state that is folded into reservation shape.
Aerator 23 is cylinder types, and has the outlet 31 that is limited to aerator 23 upper ends.In the lower end of aerator 23 adaptor union 32 is set.The unshowned gas generant that is used for producing gas is contained in aerator 23.Gas by the outlet 31 from producer 23 to flows outside.Extending the electric wiring 33 of coming from unshowned control circuit is connected with adaptor union 32.Unshowned crash sensor is used to detect the collision that is applied to vehicle body side, is electrically connected by control circuit and aerator 23.When air bag 22 is contained in the case 13, aerator 23 is arranged in the air bag 22, its rear end along air bag 22 is extended, and adaptor union 32 is protruding from the bottom of air bag 22.
As shown in Figure 3 and Figure 4, holding element 24 is that metal forms, and has polygonal shape.Pair of bolts 34 is stretched out with respect to vehicle backward from the upper and lower of holding element 24.Corresponding with bolt 34, limit a pair of connecting bore 35 in the rear end of air bag 22, and on case 31, limit a pair of fastener hole 36.Each bolt 34 is passed after one of cooresponding connecting bore 35 and the fastener hole 36 that is associated, again with nut 37 and bolt 34 fastenings.So just holding element 24 is anchored on the inboard of case 13.Under this state, air bag 22 is fixing with case 13, and when holding element 24 was contained in the air bag 22, it was along the rear end vertical extent of air bag 22.
Aerator 23 is contained in the holding element 24, and is fixed in air bag 22 by holding element 24 thus.Corresponding with the outlet 31 of aerator 23, gas port 38 is limited to the upper end of holding element 24.Gas port 38 makes gas from aerator 23 mainly along the transverse flow of aerator 23, has some upwards to advance from the gas of aerator 23 simultaneously.In the lower end of holding element 24, formed the fixed plate 39 of fixed parts effect.Fixed plate 39 is pushed, thereby the diameter of fixed plate 39 is reduced, in such a way, just aerator 23 is fixed in the inboard of holding element 24.
In Figure 1A, air bag 22 launches and does not hold gas.In Figure 1B and Fig. 1 C, air bag 22 expansions are launched with gas.Film formed cloth sheet 41 doublings of will form by fabric or resin, and the periphery of cloth sheet 41 sewed up, the air bag 22 of cryptomere formed.Therefore, in the rear end of air bag 22, couple together continuously each other limiting the first surface part 42 of 22 1 sides of air bag and the second surface part 43 of qualification opposite flank.Air bag 22 comprises the sealing 44 that the stitching by air bag 22 peripheries forms.Therefore sealing 44 extends along periphery.
Fig. 5 represents to be in the air bag 22 under the open mode when the inboard is watched.Cloth sheet 41 comprises first surface part 42 and second surface part 43, and first fold line 45, and it is limited between first surface part 42 and the second surface part 43.Along first fold line 45 with 41 doublings of cloth sheet.Connecting bore 35 is limited on first fold line 45.
As shown in Figure 6, in cloth sheet 41, form " paddy is folding " along first fold line 45.That is, as shown in Figure 6, along first fold line 45 with 41 doublings of cloth sheet.Inwardly that flap section 46 paddy are folding along second fold line 48 and relative air bag 22.So, in flap section 46, form " peak is folding " along the 3rd fold line 49.That is, as shown in Figure 6, flap section 46 is folded into doubling along the 3rd fold line 49.
With reference to Figure 1A, Fig. 1 C and Fig. 3, in the inwardly folding flap section 46 of relative air bag 22, each limit 47 of projection 46a, consistent with the lower end of the periphery of cloth sheet 41 or first surface part 42 and second surface part 43.Along sealing 44, the periphery of projection 46a is sewed up with the periphery of first surface part 42 and second surface part 43.As shown in Fig. 7 A and Fig. 7 B, sew up the periphery of projection 46a in such a way, flap section 46 is contained in the air bag 22 and not protruding.Under this state, flap section 46 limits with respect to air bag 22 towards in-to-in recessed 51.
Assembling process to side air bag device 20 makes an explanation below.This program comprises: make the step of air bag 22, and the step that aerator 23 and air bag 22 is fixing, and air bag 22 is contained in step in the case 13 with aerator 23.More specifically, the step of making air bag 22 comprises: with the substep that holding element 24 and cloth sheet 41 are fixed, and the substep of flipe sheet 41, and the substep of finishing air bag 22 by stitching cloth sheet 41.
In the substep that holding element 24 and cloth sheet 41 are fixed, holding element 24 is inserted in the socket 50 of cloth sheet 41 as shown in Figure 5.Then the bolt of holding element 24 is passed the connecting bore 35 of cloth sheet 41, thus, with holding element 24 and 41 working fastenings of cloth sheet.Under this state, the fixed plate 39 of holding element 24 is protruding from air bag 22.In order to make holding element 24 be easier to be inserted in the socket 50, interior all sizes of preferred socket 50 are bigger than the peripheral dimension of holding element 24.
In the substep of flipe sheet 41, with the holding element 24 flipe sheets 41 that are fastened on the cloth sheet 41 temporarily, as shown in Figure 6.Along first fold line 45, be that paddy is folding with the 41 whole doublings of cloth sheet.Along second fold line 48 that flap section 46 paddy are folding, along the 3rd fold line 49 that its peak is folding then.In this way, make flap section 46 relative air bags 22 inwardly folding.Under the state of doubling, first surface part 42 and second surface part 43 overlap each other, and the flap section 46 of doubling is arranged between first surface part 42 and the second surface part 43.The limit 47 of projection 46a is consistent with the lower end of first surface part 42 and second surface part 43.
In sewing up the substep of air bag 22, the periphery of the cloth sheet 41 of doubling is sewed up.Because the limit 47 of projection 46a is consistent with the lower end of first surface part 42 and second surface part 43, so, the periphery of flap section 46 and the periphery of cloth sheet 41 are stitched together.In this way, with reference to Figure 1A, form air bag 22 by having the cloth sheet 41 of sewing up periphery.In addition, it is recessed 51 that flap section 46 limits, shown in Fig. 7 A and Fig. 7 B.Under this state, the lower end of holding element 24 and fixed plate 39 thereof are protruding from air bag 22.
Aerator 23 is being fixed in the step of air bag 22, aerator 23 is being inserted into the holding element 24 from the opening that is limited to holding element 24 lower ends.Then fixed plate 39 is pushed, thus aerator 23 and holding element 24 are fixed.With electric wiring 33, for example, be connected with the adaptor union 32 of aerator 23.
In that air bag 22 is contained in the step of 13 li of cases, air bag 22 is folded into reservation shape, and the bolt 34 of holding element 24 is passed case 13 cooresponding fastener holes 36.Then, with nut 37 and bolt 34 fastenings, thus, air bag 22 is fixing with case 13 by holding element 24.
In the step of sewing up air bag 22,,, the end of sealing 44 and the outer surface of holding element 24 are separated in the suturing part office of flap section 46 with reference to Fig. 1 C.This just feasible can stitching has the cloth sheet 41 that holding element 24 is fixed thereon, and is not subjected to the influence of holding element 24 sizes.Thereby when keeping in touch each other, the periphery that makes the periphery of cloth sheet 41 and flap section 46 sews up.
As mentioned above, after finishing stitching step, only with socket 50 corresponding positions, the inside of air bag 22 is connected with the outside.In addition, before stitching step, holding element 24 is passed insertion mouth 50.Thus, do not adjust the size of socket 50, and need not to make it can pass the size of opening 50 greater than holding element 24 by stitching.In addition, by aerator 23 is inserted holding elements 24, and utilize fixed plate 39 that aerator 23 is fixed in holding element 24, just aerator 23 can be fixed in air bag 22 simply.In addition, the lower end of holding element 24 and fixed plate 39 stretch out to the outside from air bag 22.Thereby aerator 23 is fixing with air bag 22, and be not subjected to the influence of socket 50 sizes.Thus, no longer need to seal flap section 46, also do not need to adjust the size of socket 50.As a result, after installation side airbag apparatus 20, perhaps, specifically after stitching step, air bag 22 is no longer needed to carry out post-processing, such as socket 50 is sealed, reduces size or shutoff.
The operation of side air bag device 20 is as follows.When make the tampering action that exceeds predeterminated level during, send detection signal from the crash sensor (not shown) in vehicle body side owing to for example collide.In response to this signal, the control circuit (not shown) provides drive current for aerator 23.Thereby aerator 23 is heated by drive current, causes gas generant to produce gas.Along the direction that arrow among Fig. 3 is represented, make gas deliver to air bag 22 inside.In this way, air bag 22 is opened from folded state, and it is put on the air.
In this stage, with reference to Fig. 8, recessed 51 corresponding parts with limiting around socket 50 with respect to air bag 22, are subjected to gaseous tension and outwards oppress.Make this part or flap section 46, therefore the outer surface with holding element 24 keeps closed contact.In this way, flap section 46 plays the effect of boiler check valve.The space that limited of shutoff socket 50 and holding element 24 outer surfaces thus.Under this state, after air bag 22 expanded expansion, air bag 22 was with socket 50 sealings, and restriction is from the gas leakage of socket 50 and holding element 24 outer surfaces institute restricted space.As a result, make the internal pressure of air bag 22 remain on high relatively level.
Under this state,, reduce by the pressure that gas flow produced from aerator 23 through after the schedule time.Therefore, the gaseous tension in the holding element 24 becomes lower than the internal pressure of air bag 22.This just cause gas from air bag 22 to holding element 24 internal flows.Because the inside of air bag 22 is connected with the outside by holding element 24, so holding element 24 has just played the effect of deflation hole.By holding element 24, gas is discharged to the outside from air bag 22 thus.By contrast, when air bag 22 is in the following time of state of expand launching, higher relatively by the pressure that gas caused that provides from aerator 23, the gaseous tension that holding element is 24 li is higher than air bag 22 internal pressures.This just limited excess gas by holding element 24 from air bag 22 to external leaks.
First embodiment has the following advantages.
(1), the periphery of flap section 46 is sewed up with the periphery of cloth sheet 41 at sealing 44 places.Flap section 46 define thus relative air bag 22 inwardly recessed 51.Holding element 24 is inserted in the air bags 22 by socket 50, be connected with recessed 51 and insert 50.In addition, socket 50 just is used for holding element 24 is arranged in air bag 22, and does not influence the fixing of aerator 23 and air bag 22.Therefore, after the periphery of cloth sheet 41 is sewed up, not internally the folding part divide 46 and socket 50 seal.Thus, the also just unessential post-processing of carrying out socket 50.
When (2) launching, be subjected to the outside compressing of the relative air bag of gaseous tension 22 with recessed 51 corresponding parts when air bag 22 is expanded.This just causes flap section 46 to play the effect of boiler check valve, thus, when launching when air bag 22 is expanded, suppresses gas and leaks from socket 50.Therefore, make air bag 22 internal pressures remain on high relatively level.
(3) lower end of holding element 24 and fixed plate 39 thereof are protruding from air bag 22.When this just feasible fixedly aerator 23 and holding element 24, the operator need not its hand is inserted air bag 22.In addition, even after sewing up air bag 22, still holding element 24 can be fixed or inserted or be installed to aerator 23.The production efficiency that so can improve is made air bag 22.
(4) because the inside of air bag 22 is connected with the outside by holding element 24, and holding element 24 plays the effect of deflation hole, air bag 22 expand launch after, make gas can pass through holding element 24 from air bag 22 to flows outside.Thus, need not in air bag 22, to be provided with independent deflation hole.
(5) because socket 50 is limited on the 3rd fold line 49, the part of socket 50 is corresponding with recessed 51 the end.Just make socket 50 cannot see with simple structure from the side of air bag 22.
(6) since socket 50 with respect to the 3rd fold line 49 vertical extent, when with the relative air bags 22 of flap section 46 when inwardly folding, socket 50 extends on the direction that makes air bag 22 expansions.This just makes holding element 24 facilitate penetration of jack part 50.
(7) projection 46a makes peripheral overlapping being more prone to the periphery and the cloth sheet 41 of flap section 46.Thus, the periphery of the periphery of flap section 46 and cloth sheet 41 is stitched together easily.
(8) projection 46a has triangular shaped.In addition, folding in such a way flap section 46 makes that the limit of projection 46a is consistent with the lower end of first surface part 42 and second surface part 43.The tip of projection 46a is positioned on the periphery of cloth sheet 41.So just can avoid air bag 22 inside and be connected by the gap that flap section 46 doublings are limited between projection 46a and interior section 46b.
Below, with reference to Fig. 9 to Figure 13 B, second embodiment of the present invention is described.
Fig. 9 is illustrated in the right front seat 121 that is provided with among the crew department.Front chair 121 comprises seat portion 121a and backrest 121b.In the time of in being contained in case 123, side air bag device 122 is embedded in the right side part of backrest 121b.With side air bag device 122 and unshowned car door positioned opposite, this car door forms the part of vehicle body side.Although only show right-side seat 121 in the drawings, also be provided with the left side front chair, and the device identical with side air bag device 122 is installed on the backrest of left side front chair.In Fig. 9, show the air bag 124 of side air bag device under the deployed condition.When expand launching, air bag 124 extends into vehicle body and sits on the front chair 121 in the gap between the occupant P.
As shown in Figure 10, side air bag device 122 comprises: air bag 124, when gas is provided, can expands it and launch; Aerator 125 is used to produce gas; And holding element 126.By holding element 126, side air bag device 122 is fixed in case 123, it is arranged on the effect of playing holding portion among the crew department.
Air bag 124 comprises the first fabric portions 124a and the second fabric portions 124b.When air bag 124 inflation, the first fabric portions 124a and the second fabric portions 124b limit the relative lateral parts of air bag 124.Fabric portions is formed by for example machine-processed fabric, and makes it locate to connect continuously at air bag 124 near-ends (rear end).By the first fabric portions 124a and the second fabric portions 124b are stitched together, form the air bag 124 of cryptomere.In the near-end top of (backward) with respect to vehicle, limit socket 127, and make its look from air bag 124 sides have L shaped.Socket 127 is corresponding with the first fabric portions 124a and the unstitched part of the second fabric portions 124b, and sutured portion is not arranged on the top of air bag 124 near-ends.Socket 127 has from air bag 124 upper shed part 127a up, and proximal open part 127b, its facing to the near-end of air bag 124 right direction.Upper shed part 127a and proximal open part 127b limit each other continuously.As shown in figure 11, the first fabric portions 124a and the second fabric portions 124b are being separated from each other with socket 127 corresponding positions.This just makes holding element 126 be inserted in the air bag 124 by socket 127.With reference to Figure 10, the open end portion that is shaped and extends in the mode of bending from upper shed part 127a proximad opening portion 127b.The open end of socket 127 comprises sweep 128 thus.
As shown in figure 11, aerator 125 is cylinder types, and is included in the aerator 125 terminal adaptor union 125a that form.With adaptor union 125a opposing ends place, aerator 125 be formed with the outlet 125b.Unshowned gas generant is contained in the aerator 125.When by the current flow heats that provides from adaptor union 125a, gas generant will produce gas, and gas flows out from outlet 125b.
Holding element 126 is made of metal, and forms cylinder.In addition, in such a way holding element 126 is inserted air bag 124 by socket 127, make holding element 126 be fixed on the proximal end of air bag 124.Holding element 126 vertical extent, and have the opening 126a that limits on holding element 126 tops.By opening 126a, aerator 125 is inserted holding element 126.Holding element 126 is arranged in the air bag 124, and stretches out to the outside with the corresponding end of opening 126a.A pair of up and down bolt 126b self-insurance gripping member 126 is stretched out backward with respect to vehicle.Each bolt 126b is passed in one of corresponding aperture that limits on the center line of air bag 124 near-ends, and extends through case 123.As shown in figure 10, by with nut 129 and bolt 126b fastening, thus airbag apparatus 122 is fixing with case 123.
As shown in figure 11, be inserted into holding element 126 and vertical extent from opening 126a aerator 125, adaptor union 125a is arranged in the top of air bag 124, and outlet 125b then is positioned at the bottom of air bag 124.Adaptor union 125a is protruding from air bag 124 by opening 126a.Electric wiring adaptor union (not shown) is connected with adaptor union 125a, and by control circuit crash sensor is electrically connected with aerator 125 thus.125b is arranged on the bottom of holding element 126 with outlet, or is contained in the air bag 124, is used for providing gas to air bag 124 inside.Sentence the mode that the diameter that makes holding element 126 reduces at fixed part 126c and push holding element 126, in Figure 11, represent fixed part 126c with long and two-short dash line.Thus, aerator 125 is fixed to the inboard of holding element 126.Make fixed part 126c be exposed to the outside of air bag 124 from socket 127.After this layout makes that even holding element 126 is received in the air bag 124, also aerator 125 can be fixed to the inboard of holding element 126.
Now the method for folding to the air bag 124 of side air bag device 122 is described.In the first step of this method, prepare air bag 124, it forms flats, and has socket 127.In substep, by this way holding element 126 is passed socket 127, make the part of holding element 126 in socket 127, stretch out, and the holding element 126 and the open end of socket 127 are kept in touch, limit contact point p1 thus, with reference to Figure 12 A and Figure 12 B.After this step is first folding step and second folding step.More specifically, in first folding step, the fold line 130 that qualification begins from contact point p1, and along fold line 130 folded airbags 124, in second folding step, from the far-end of air bag 124 to holding element 126 respective side, in pleating mode, the further air bag 124 of burst under folded state.
Shown in Figure 12 A and Figure 12 B, the fold line 130 defined in first folding step is from the remote extension of socket 127 to air bag 124.In this step,, make on its bottom that overlaps air bag 124 by this way along the top of fold line 130 folded airbags 124.This just fastens to holding element 126 end of socket 127.Contact point p1 is set in the sweep 128 of socket 127.This is convenient to holding element 126 and accepts fastening force effectively, and this fastening force is the top with air bag 124 when folding into the bottom of air bag 124, is applied to holding element 126 by the first fabric portions 124a and the second fabric portions 124b.Perpendicular with the axis 131 of aerator 125, fold line 130 is from the far-end linear extension of contact point p1 to air bag 124.Fold line 130 finishes at the periphery of air bag 124 far-ends and the intersection point p2 place between the fold line 130.Prior to first folding step, along following fold line 132 that the bottom of air bag 124 is upwards folding, following fold line 132 is from the near-end of air bag 124 remote extension to air bag 124.
As shown in FIG. 13A, in second folding step, along a plurality of peaks broken line 133 and paddy broken line 134, its linear separately and extension vertically in pleating mode, folds air bag 124.More specifically, make the folding of air bag 124, from the far-end of air bag 124, and folding to holding element 126 (near-end of air bag 124) continuously.Thus, when the near-end to air bag 124 provides gas, to air bag 124 far-ends (before vehicle), air bag 124 expansions are launched from air bag 124 near-ends (behind vehicle).With reference to Figure 13 B, when finishing second folding step, the near-end (holding element 126) with respect to air bag 124 makes air bag 124 remain on retracted mode.When covering with lid 135, air bag 124 is maintained under this state, in Figure 13 B, represent lid 135 with long and two-short dash line.Then, air bag 124 is installed in the side air bag device 122, and side air bag device is contained in the case 123 of backrest 121b, as shown in Figure 9.
Operation to side air bag device 122 makes an explanation below.In the time will applying vehicle body side above the collision of predeterminated level owing to for example collide, the crash sensor (not shown) produces detection signal.In response to this signal, the control circuit (not shown) provides drive current for aerator 125.Thereby by drive current aerator 125 is heated, and cause gas generant to produce gas.Then, gas flows out from outlet 125b, and forms pressure, its air bag 124 expansions that act as retracted mode shown in Figure 13 B launch, reach the deployed condition of Figure 13 A, under this state, make peak broken line 133 and paddy broken line 134 reveal (initial condition that expands and launch).In this stage, air bag 124 is maintained along the folding state of fold line 130 and fold line 132.Thereby socket 127 is still by air bag 124 and holding element 126 sealings.In this way, when air bag 124 is deployed into starting stage of launching with the corresponding expansion of Figure 13 A during state from the retracted mode of Figure 13 B, restriction is from the gas leakage of socket 127.
When air bag 124 internal pressures are further raise, with air bag 124 inflations, from the state of starting stage of launching with the corresponding expansion of Figure 13 A, become the state of Figure 12 A and Figure 12 B, make fold line 130 reveal (opening with gas filed) therein than after-stage.In this stage, with socket 127 from removing by air bag 124 and holding element 126 leak free states.Some gases can be overflowed from socket 127, increase thereby eliminate pressure excessive in the air bag 124.
Second embodiment has the following advantages.
(9) in second embodiment, the method for folding of air bag 124 comprises the step of preparing air bag 124, step, first folding step that limits contact point p1, and second folding step.The fold line 130 that uses in first folding step is from contact point p1.After first folding step, from the far-end of air bag 124 to holding element 126 corresponding ends, with pleating mode folded airbag 124.Make air bag 124 remain on this state.Therefore, according to the method for second embodiment, folded airbag 124, simultaneously also by with the end of the socket 127 corresponding first fabric portions 124a and the second fabric portions 124b with holding element 126 fastenings.Even with respect to the external diameter of holding element 126, make socket 127 sizes enough big, folded airbag 124 by this way, also can make socket 127 sealings in first folding step.In addition, when making air bag 124 remain on the state that produces by second folding step, just make socket 127 remain on the leak free state.Therefore, when air bag 124 expands expansion, particularly, can suppress from the gas leakage of socket 127 in the starting stage of expanding and launching.Thus, can avoid air bag 124 internal pressures to descend, and easily the expansion expansion of air bag 124 be controlled.
In addition, expand to launch than after-stage, the tightening state of socket 127 is removed, and some gases can be overflowed to the outside from air bag 124 by socket 127.In other words, socket 127 plays the effect of exhausr port (deflation hole).When this has just limited air bag 124 expansions and has launched in the air bag 124 excessive pressure increase, protect occupant P thus reliably.In addition, because socket 127 plays the effect of exhausr port, also just need not in air bag 124, to be provided with independent exhausr port.Simplified the structure of air bag 124 thus, made and make side air bag device 122 easily.
(10) in the method for second embodiment, along the end of socket 127 sweep 128 is set, and contact point p1 is limited in the sweep 128.Therefore, when along fold line 130 folded airbags 124, by means of the end of socket 127, holding element 126 can bear the tightening force that is applied to holding element 126 effectively.Easier of thus socket 127 sealings, and more effectively be limited in of the gas leakage of the starting stage of the expansion of expanding from socket 127.
(11) fold line 130 linear extensions and perpendicular to the axis 131 of cylinder type aerator 125.Therefore, when folded airbag 124 in second folding step, 124 far-end carries out this folding to holding element 126 along fold line 130 from air bag, like this, carries out this kind easily and folds.In addition, the peak broken line 133 of second folding step and paddy broken line 134 are perpendicular to fold line 130 extensions of first folding step.Thus, along peak broken line 133 and paddy broken line 134, easily with pleating mode folded airbag 124.
(12) socket 127 is limited to top corresponding to the air bag 124 on crew department top.To shorten a kind of like this mode of air bag 124 vertical dimensions, the top of folded airbag 124 in first folding step makes side air bag device 122 to be contained in densely in the case 123.In addition, opening and gas filed initial condition, promptly along with the state of the cooresponding fold line deployment balloon 124 of second folding step under, when expansion deployment balloon 124, the vertical dimension that keeps air bag 124 to shorten.
(13) at second folding step, in pleating mode, from the far-end of air bag 124 to holding element 126 folded airbags 124.This just makes is opening and the gas filed starting stage, and when promptly air bag 124 is opened with the corresponding fold line of second fold line in the edge, but air bag 124 at high speeds are opened and put on the air.In addition, with the part of the corresponding air bag 124 of employed contact point p1 in first folding step, be subjected to extruding with the outside of the folding air bag 124 of pleating mode.Therefore, opening and the gas filed starting stage, can more effectively limit gas leakage from socket 127.
(14) holding element 126 is formed by metal, and is contained in the air bag 124, and with corresponding holding element 126 ends of opening 126a, then stretch out to the outside from air bag 124 by socket 127.By holding element 126 being pushed, aerator 125 is fixed to holding element 126 inside at fixed part 126c.Make the fixed part 126c of holding element 126 be exposed to the outside of air bag 124 from socket 127.Therefore, as long as holding element 126 is fixing with air bag 124,, by aerator 125 is inserted holding elements 126, and fixed part 126c is pushed, easily aerator 125 is fixed in holding element 126 even after finishing second folding step.Therefore, can not relate to the aerator 125 that relative difficult handles and carry out said method in preceding step, thereby more help the manufacturing of side air bag device 122.
(15) because adaptor union 125a stretches out outside air bag 124 from opening 126a, easily the electric wiring adaptor union is connected with adaptor union 125a.This just easier in vehicle installation side airbag apparatus 122.
Illustrated embodiment can carry out following improvement.
With reference to Figure 14 A and Figure 14 B, projection 46a can be saved from the side air bag device 20 of first embodiment.Thereby only form flap section 46 by interior section 46b.In the case, because flap section 46 doublings are connected with the inside of air bag 22 by the space that interior section 46b is limited.Therefore, preferably, when air bag 22 sides are watched, will stitch 44 shapes that form basic corresponding letter " G ".Replacedly, socket 50 can be saved, and replace gap 52 as socket.
The shape of the first embodiment projection 46a is not limited to triangle, but can be square, oval or band shape.
As Figure 15 and shown in Figure 16, can limit the socket 50 of first embodiment with a kind of like this mode, it is extended at the 3rd fold line 49.In the case, socket 50 is extended in the direction of folding this flap section 46.Thus, the end of socket 50 is holding element 24 fastenings, thereby more effectively limits the gas leakage from socket 50.Replacedly, except vertical the 3rd fold line 49 or along the direction of the 3rd fold line 49, socket 50 can also extend in the direction of intersecting with the 3rd fold line 49.In addition, the shape of socket 50 needn't be an elongated shape, and can be criss-cross, circle, ellipse or polygon.In Figure 14 A and Figure 14 B, form socket 50 by the elongated open of extending at the 3rd fold line 49.Yet the socket 50 among the figure can extend with the 3rd fold line 49 directions perpendicular or that intersect, and has criss-cross, circle, ellipse or polygonal shape.
In the first embodiment, before sewing up cloth sheet 41, with holding element 24 and 41 working fastenings of cloth sheet.Yet, also can be after sewing up cloth sheet 41 fully, with holding element 24 and 41 working fastenings of cloth sheet.
In the first embodiment, in air bag 22, independent deflation hole can be set, be used for overflowing gas from deflation hole.
In the first embodiment, holding element 24 can be contained in the air bag 22 fully.Replacedly, can arrange holding element 24, the lower end of holding element 24 and fixed plate 39 are contained in recessed 51 with a kind of like this mode.
Shown in Figure 17 A and 17B, aerator 125 can be provided with the part of the aerator 125 of second embodiment, and it stretches out outside air bag 124 from socket 127.Fold line 130 is from the contact point p1 between aerator 125 and socket 127 ends.In such cases, folded airbag 124 in such a way, make win fabric portions 124a and the second fabric portions 124b and socket 127 cooresponding ends, with aerator 125 fastenings, thereby with socket 127 sealings.This has just limited the pressure decay in the air bag 124, and controls opening and inflating of air bag 124 easily.
With reference to Figure 17 A and Figure 17 B, except with the axis 131 perpendicular extensions of aerator 125, the fold line 130 of second embodiment also can extend along different directions.
With reference to Figure 18 A and Figure 18 B, different with second embodiment, the end of socket 127 can not limit sweep 128.In such cases, contact point p 1 can be set on the straight line of the end that comprises socket 127.
In second embodiment, proximal open part 127b can be saved.That is upper end that can be from the end of upper shed part 127a to air bag 124 is sewed up air bag 124.
Shown in Figure 19 A, in second embodiment, when along fold line 130 folded airbags 124, folded portions can be contained in the space between air bag 124 inboards or the first fabric portions 124a and the second fabric portions 124b.
In second embodiment, can with the bottom of the corresponding air bag 124 in crew department bottom, socket 127 is set.In such cases, along the fold line in first folding step, the bottom of folded airbag 124 makes airbag apparatus 122 to be contained in compactly in the case 123.In addition, in the starting stage of expanding and launching, when promptly the edge is with the corresponding fold line of second folding step deployment balloon 124, when launching, keep its short vertical dimension when air bag 124 is expanded.
In second embodiment, aerator 125 can be arranged in the holding element 126, and outside air bag 124, not stretch out from opening 126a.
In second folding step of second embodiment, air bag 124 can be folded into the roller shape from the far-end of air bag 124 to holding element 126.
In second embodiment, can omit air bag 124 edges folding of broken line 132 down.
Shown in Figure 19 B, the airbag apparatus 122 of second embodiment can comprise storage container 136, is used for holding under rounding state air bag 124 and holding element 126.Can socket 127 be set with a kind of like this mode, make that socket 127 is arranged in storage container 136 when air bag 124 expands expansion.In the case, when air bag 124 expands when launching, by storage container 136 with socket 127 shutoff, thereby gas can slowly be overflowed from socket 127.This just can suitably adjust the internal pressure in the air bag 124 when air bag 124 expands expansion.Storage container 136 can be formed by for example metal or resin.
In second embodiment, can make the first fabric portions 124a and second 124b of fabric portion form chorista.Replacedly, the first fabric portions 124a can form by being connected a plurality of fabric portions separately with second 124b of fabric portion.
In the first embodiment, the fixed part that is provided with in holding element 24 is not limited to fixed plate 39, and can be for example spring, as long as can make aerator 23 fixing reliably.In addition, in second embodiment, through hole can extend through fixed part 126c, and fastener such as spring can be passed this through hole, is used for aerator 125 fixing with holding element 126.
In second embodiment, can between the back seat of vehicle and corresponding side, side air bag device 122 be set.In the case, when launching when expanding, air bag 124 extends among the occupant and the gap between the vehicle body side who sits on the back seat.
In the first embodiment, airbag apparatus can be specialized as the knee air bag device near the wherein air bag expansion of occupant's foot, expanding; The side air bag device that perhaps is used for back seat, wherein air bag launches in the lateral expansion that is seated at occupant on the back seat.In addition, in second embodiment, airbag apparatus can be embodied as the rear gasbag device.The rear gasbag device is installed in the front chair with front seats and back seats vehicle, thereby makes air bag 124 can extend to the expansion of expanding of mode among the gap between the front seats and back seats.By this way, air bag 124 can be protected the driver leg that for example is seated on the back seat.
Therefore, present embodiment and specific embodiment should be counted as illustrative and not restrictive, and the present invention is not limited to the details that this paper provides, but can improve in the scope of claims and equivalence replace it.
Claims (6)
1. airbag apparatus, comprise the gas generator and the air bag that are used to produce gas, described gas launches described airbag inflation when starting described gas generator, described air bag has a kind of socket, by this socket described gas generator is inserted in the described air bag, and described gas generator comprises the part of stretching out to the outside from described air bag by described socket, described socket be is characterized in that by this part sealing:
Described air bag comprises the cloth sheet, and described relatively air bag inwardly limit recessed, by with the doubling of described cloth sheet, and the periphery of described cloth sheet sewed up, form described air bag,
Wherein, described cloth sheet has first fold line that is used for the doubling of described cloth sheet, and flap section, and described flap section comprises the extension line of described first fold line, and described flap section is arranged in the peripheral part of described cloth sheet,
Wherein, described flap section has second fold line that limits described flap section, and the 3rd fold line that extends along the extension line of described first fold line,
Wherein, by along described second fold line with respect to the inside folding described flap section of described air bag,, and the periphery of described flap section sewed up with the periphery of described cloth sheet described flap section doubling along described the 3rd fold line, thereby be provided with described recessed, and
Wherein, described socket is arranged in the described flap section, and by described flap section with described spigot seal.
2. according to the described device of claim 1, it is characterized in that described gas generator comprises the aerator that described gas is provided in described air bag, and the holding element that is fixed in described air bag, be used for described aerator is fixed in described air bag, and
Wherein, described holding element comprises the fixed part that is used for fixing described aerator, and described holding element is fixed in described air bag, and described fixed part is protruding from described air bag by described socket.
3. device according to claim 2 is characterized in that, described holding element is made cylindrical shape, and, inside and the external communications by the described air bag of described holding element wherein.
4. device according to claim 1 is characterized in that: described socket extends at the bearing of trend of crisscross or described the 3rd fold line of described the 3rd fold line.
5. according to claim 1 any described device of claim to the claim 4, it is characterized in that: described flap section comprises:
The projection that stretches out to the outside of described cloth sheet from described cloth sheet edge; And
Compare the interior section of inwardly arranging with respect to described cloth sheet with the described edge of described cloth sheet.
6. device according to claim 5 is characterized in that, described projection is formed triangle, and wherein folding in such a way described flap section makes that the described periphery of the described periphery of described projection and described cloth sheet is overlapping.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004261266A JP4297014B2 (en) | 2004-09-08 | 2004-09-08 | Airbag device |
| JP2004261266 | 2004-09-08 | ||
| JP2004275926 | 2004-09-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1769102A CN1769102A (en) | 2006-05-10 |
| CN100379611C true CN100379611C (en) | 2008-04-09 |
Family
ID=36156218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100984675A Expired - Fee Related CN100379611C (en) | 2004-09-08 | 2005-09-08 | Airbag apparatus and airbag folding method |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4297014B2 (en) |
| CN (1) | CN100379611C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE46909E1 (en) * | 2006-09-22 | 2018-06-26 | Autoliv Development Ab | Manufacturing method of airbag cushion, and the airbag cushion |
| US7837226B2 (en) * | 2008-12-09 | 2010-11-23 | Toyoda Gosei Co., Ltd. | Airbag apparatus |
| JP5822541B2 (en) * | 2011-06-01 | 2015-11-24 | タカタ株式会社 | Airbag manufacturing method and airbag device manufacturing method |
| JP6217447B2 (en) * | 2014-02-24 | 2017-10-25 | 豊田合成株式会社 | Airbag device |
| EP3168091B1 (en) | 2014-07-09 | 2018-10-24 | Autoliv Development AB | Airbag device |
| CN106394474B (en) * | 2015-07-31 | 2019-06-07 | 奥托立夫开发公司 | Air-bag module, the manufacturing method of air bag and method that air-bag module is installed to vehicle |
| JP6642366B2 (en) * | 2016-09-28 | 2020-02-05 | 豊田合成株式会社 | Knee protection airbag |
| JP6769422B2 (en) * | 2017-10-23 | 2020-10-14 | 豊田合成株式会社 | Airbag device |
| CN112533797A (en) * | 2018-09-05 | 2021-03-19 | 奥托立夫开发公司 | Side airbag device |
| JP6962967B2 (en) * | 2019-05-30 | 2021-11-05 | オートリブ ディベロップメント エービー | Side airbag device |
| CN115551745A (en) * | 2020-06-02 | 2022-12-30 | 奥托立夫开发公司 | Vehicle airbag device and method for manufacturing same |
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| JPH0986329A (en) * | 1995-09-25 | 1997-03-31 | Toyota Motor Corp | Seat embedded type air bag device for side impact |
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| CN1056571C (en) * | 1994-11-29 | 2000-09-20 | 丰田合成株式会社 | Air bag device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1056571C (en) * | 1994-11-29 | 2000-09-20 | 丰田合成株式会社 | Air bag device |
| JPH0986329A (en) * | 1995-09-25 | 1997-03-31 | Toyota Motor Corp | Seat embedded type air bag device for side impact |
| US6447003B1 (en) * | 1997-02-20 | 2002-09-10 | Autoliv Development Ab | Airbag module having an airbag with a receiving pocket for the gas generator |
| JPH10297409A (en) * | 1997-02-27 | 1998-11-10 | Toyoda Gosei Co Ltd | Air bag for side collision |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN1769102A (en) | 2006-05-10 |
| JP4297014B2 (en) | 2009-07-15 |
| JP2006076392A (en) | 2006-03-23 |
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