CN104401286A

CN104401286A - Air bag

Info

Publication number: CN104401286A
Application number: CN201410534457.0A
Authority: CN
Inventors: 柴山幸史; 本田健作; 佐藤祐司; 伊藤通康; 堀田昌志; 青木雅司; 山村大辅
Original assignee: Toyoda Gosei Co Ltd
Current assignee: Toyoda Gosei Co Ltd
Priority date: 2010-07-28
Filing date: 2011-07-26
Publication date: 2015-03-11
Anticipated expiration: 2031-07-26
Also published as: CN104401286B

Abstract

The invention relates to an air bag. The air bag comprises an expanding part that utilizes expansion of expanding air and is divided into an upper expanding part and a lower expanding part through a separation element. While the expanding part is expanded and tensioned horizontally, the separation element is long-strip-shaped. The length of the long edge is greater than that of the short edge vertically intersected to the long edge. The air bag is closed in the early stage when expanding air is supplied for the expanding part. A pressure adjusting valve opened in the supplying process is disposed on the separation element. The air bag further comprises a slot-shaped inner opening extending in the direction of the short edge, and a pair of approaching/separating valve bodies disposed around the inner opening.

Description

Airbag apparatus

The divisional application that the application is the applying date is on July 26th, 2011, application number is 201110210767.3, invention and created name is the application of " airbag apparatus ".

Technical field

The present invention relates to a kind of airbag apparatus, it is when applying to impact to vehicle because of collision, and by making air bag expand, protection passenger avoids being subject to this impact.

Background technology

Protect passenger to avoid being subject to the device of this impact as when applying impact because of collision to vehicle, airbag apparatus is actv..This airbag apparatus has the charging blower being formed as bag-shaped air bag and supplying expansion gas in this air bag.

As a kind of mode of this airbag apparatus, there is the side air bag device that protection passenger avoids being subject to being hit etc. by side the impact caused.In this side air bag device, above-mentioned air bag is assembled in the back of seat of such as seat with folded state together with charging blower.In this side air bag device, if from side to parts (Vehicular side body), the such as side door applying impact forming side portion of vehicle, then expansion gas is supplied to inside air bag from charging blower.Utilize this expansion gas that air bag is expanded to launch, be retained in the state in back of seat in a part under, eject from seat.In the small space of this air bag between the passenger occupied on seat and Vehicular side body, expansion of forwards expanding.The air bag launched that expands retrains passenger, simultaneously stability impact energy between passenger and the Vehicular side body entered in car, and protection passenger avoids being subject to above-mentioned impact.

As a kind of mode of above-mentioned side air bag device, existing inside air bag is not by the type (hereinafter referred to as " prior art 1 ") separated.

In addition, in Japanese Unexamined Patent Publication 10-67297 publication, as other modes of side air bag device, propose to arrange pressure regulating valve (pressure-gradient control valve) at separating part air bag being divided into top air bag and lower airbag, and the type (hereinafter referred to as " prior art 2 ") utilizing the effect of this pressure regulating valve to make lower airbag to expand prior to top air bag.In addition, the noun list after component names in bracket is shown in the component names used in above-mentioned publication.In the side air bag device of the prior art 2, first air bag is expanded to the height of occupant waist, is then expanded to chest level.Therefore, more efficient impact absorbing can be carried out.

In side air bag device, because of the impact from side, Vehicular side body enters in car, and air bag is pressed to passenger by this Vehicular side body.With this pressing, passenger to be withstood shocks load by air bag.This load is born the compression area of the air bag side of area, the i.e. passenger of pressure and the product representation of above-mentioned gas intracapsular pressure from air bag by passenger.Avoid the angle of being impacted from protection passenger, wish that this load reaches specified value at short notice after Vehicular side body starts to enter, then, have nothing to do with the inlet (stroke) of Vehicular side body, be maintained specified value.

But, in above-mentioned prior art 1, because with the increase of inlet of Vehicular side body, interior pressure and compression area increase, so the carrying out that enter along with Vehicular side body of the load that is subject to from air bag of passenger and increasing gradually.If Vehicular side body does not enter certain degree, then load can not reach specified value.And load also continues to increase after reaching specified value, eventually exceed specified value.Its result, before load reaches specified value, does not start to be subject to impact to passenger and protects fully.After load reaches specified value, passenger is subject to by air bag the load being greater than specified value.

On the other hand, in technical scheme 2, the concrete structure of pressure regulating valve is unclear.Therefore, the ambiguity Chu of the inlet of the load that is subject to from air bag of passenger and Vehicular side body.

And, by the structure making pressure regulating valve become complicated, although the raising of load character can be realized, in this case, can with the cost increase of airbag apparatus.

This problem is not above-mentioned side air bag device, and the airbag apparatus of other kinds may occur too.

Summary of the invention

The object of the present invention is to provide the structure that can utilize simple cheap, improve the airbag apparatus of the characteristic of load passenger being born by air bag.

To achieve these goals, according to the 1st aspect of the present invention, the feature of airbag apparatus is to have: air bag, and it is formed plane before the supply of expansion gas, and expands by being supplied to expansion gas; Bulge, it is arranged on air bag; Partition member, bulge is at least divided into upstream side bulge and downstream bulge by it; And pressure regulating valve, it is in the initial stage valve closing during bulge supply expansion gas, confined expansion gas is from upstream side bulge to the circulation of downstream bulge, valve opening from the midway in during this supply and lifting restrictions, partition member forms strip in the expansion with bulge with plane tensioning, and its length along long side direction is longer than the length along the short side direction orthogonal with this long side direction.Pressure regulating valve has: the inner opening portion of slit-shaped, and it is arranged on partition member, and extends along the short side direction of partition member; And a pair valve body, it is arranged on around inner opening portion, optionally closer to each other/separation.

According to the 2nd aspect of the present invention, the feature of airbag apparatus is to have: air bag, and it was formed plane before the supply of expansion gas, and was expanded by the supply of expansion gas; Bulge, it is formed on air bag; Partition member, bulge is at least divided into upstream side bulge and downstream bulge by it; And pressure regulating valve, it is in the initial stage valve closing during bulge supply expansion gas, confined expansion gas is from upstream side bulge to the circulation of downstream bulge, valve opening from the midway during this supply, lift restrictions, pressure regulating valve has: the inner opening portion of slit-shaped, and it is formed on partition member; And a pair valve body, it is arranged on around inner opening portion, optionally closer to each other/separation, partition member has end relatively towards each other, and by turning back along broken line, thus become the doubled state making opposed end be positioned at approximating position, the partition member of doubled state, with the state making broken line be positioned at upstream side compared with opposed end, be configured in the bulge of unexpansive deployed condition, and be combined with air bag with the both ends along broken line direction at two opposed ends.

According to the 3rd aspect of the present invention, provide a kind of airbag apparatus utilizing airbag restraint also to protect the passenger ridden on vehicle seat.Vehicle seat comprises back of seat and is arranged at a pair collateral support of back of seat both sides, and each collateral support is outstanding to the front of the vehicle, has foremost simultaneously.Side air bag device is housed in a sidepiece of back of seat.Air bag has bulge, and it utilizes the expanding gas corresponding to the impact applied from vehicle seat side from charging blower supply, forwards launches to expand in the side of vehicle seat.Bulge is divided into multiple position by plane partition member, and it at least comprises the upstream side bulge being supplied to expansion gas, and adjacent with the front side of upstream side bulge, and is supplied to the downstream bulge of expansion gas via upstream side bulge.Partition member arranges pressure regulating valve.Pressure regulating valve has: peristome, and it makes to be communicated with between upstream side bulge and downstream bulge; And make a pair valve body of peristome optionally opening and closing.Two valve body of pressure regulating valve, when upstream side bulge expands and before constraint passenger, contacted with each other by the expansion gas pressing in upstream side bulge, peristome is closed, when upstream side bulge expands and retrains passenger, utilize the externally applied forces with this constraint, bending and separated from one another by partition member, peristome is opened.Peristome is set to, and under launching the state expanded, is positioned at the position forwards leaving 85mm foremost from the collateral support vehicle seat at upstream side bulge, and from the region between the position rearward leaving 15mm foremost.

According to the 4th aspect of the present invention, provide a kind of side air bag device utilizing airbag restraint also to protect the passenger taking advantage of seat on vehicle seat.Air bag has bulge, and it utilizes the expansion gas supplied corresponding to the impact applied from vehicle seat side, forwards launches to expand in the side of vehicle seat.Bulge is divided into multiple position by plane partition member, and it at least comprises the upstream side bulge being supplied to expansion gas, and adjacent with the front side of upstream side bulge, and is supplied to the downstream bulge of expansion gas via upstream side bulge.Partition member arranges pressure regulating valve.Pressure regulating valve has: peristome, and it forms the slit-shaped extended along the Width of vehicle seat, makes to be communicated with between upstream side bulge and downstream bulge; And make a pair valve body of peristome optionally opening and closing.Two valve body of pressure regulating valve, when upstream side bulge expands and before constraint passenger, contacted with each other by the expansion gas pressing in upstream side bulge, peristome is closed, when upstream side bulge expands and retrains passenger, utilize with this constraint externally applied forces, bending and separated from one another by partition member, peristome is opened.The bulge of swelling state in the position being provided with partition member, and on the section orthogonal with fore-and-aft direction, has the length ratio outer shape the scope of 1.1 to 5.0 in of length along the vertical direction relative to the Width along vehicle seat.

Accompanying drawing explanation

Fig. 1 is in the 1st embodiment the present invention being embodied as side air bag device, by the lateral plan that the seat being provided with this side air bag device represents together with passenger.

Fig. 2 represents in the 1st embodiment, the orthogonal view of the position relationship of seat, passenger and Vehicular side body.

Fig. 3 represents in the 1st embodiment, the top plan view of the position relationship of seat, passenger and Vehicular side body.

Fig. 4 is in the 1st embodiment, the partial top section-drawing represented together with Vehicular side body by the air bag module be assembled in the resettlement section of back of seat.

Fig. 5 is in the 1st embodiment, is the partial side elevation view that the air bag module of unexpansive deployed condition represents together with seat and passenger by air bag.

Fig. 6 represents in the 1st embodiment, by the air bag module that the air bag of the unexpansive deployed condition of Fig. 5 is cut off by the middle body of vehicle-width direction, and the cross-sectional side view represented together with seat and passenger.

Fig. 7 represents in the 1st embodiment, is the part oblique drawing of the state on the top of the air bag module of unexpansive deployed condition from oblique rear observation air bag.

Fig. 8 represents the fragmentary cross-sectional view of the profile construction of the partition member of the 8-8 line along Fig. 5 etc.

Fig. 9 represents in the 1st embodiment, air bag expand and partition member with the in-built longitudinal diagram of the air bag module of plane tensioning.

Figure 10 A is the figure representing the 1st embodiment, is the part oblique drawing representing part near the pressure regulating valve on the partition member of flexion.

Figure 10 B is the figure representing the 1st embodiment, is to represent the part oblique drawing with part near the pressure regulating valve on the partition member of plane tensioning.

Figure 11 A is the instruction diagram of the action of the pressure regulating valve representing the 1st embodiment.

Figure 11 B is the instruction diagram of the action of the pressure regulating valve representing the 1st embodiment.

Figure 11 C is the instruction diagram of the action of the pressure regulating valve representing the 1st embodiment.

Figure 12 represents in the 1st embodiment, utilize the Vehicular side body that enters inside car and air bag pressing passenger time in the characteristic map of each variation pattern of pressure, compression area and load.

Figure 13 represents the state from Fig. 4, and a part to be retained in back of seat and to eject and the partial top section-drawing of the state launched that expands from seat by air bag.

Figure 14 is the figure representing the 2nd embodiment the present invention specialized, and is the air bag module cut off by the middle body of vehicle-width direction by the air bag of unexpansive deployed condition, the cross-sectional side view represented together with seat and passenger.

Figure 15 represents the fragmentary cross-sectional view of the profile construction of the partition member of the 15-15 line along Figure 14 etc.

Figure 16 represents in the 2nd embodiment, with the part oblique drawing of part near the pressure regulating valve on the partition member of plane tensioning.

Figure 17 A is the instruction diagram of the action of the pressure regulating valve representing the 2nd embodiment.

Figure 17 B is the instruction diagram of the action of the pressure regulating valve representing the 2nd embodiment.

Figure 17 C is the instruction diagram of the action of the pressure regulating valve representing the 2nd embodiment.

Figure 18 represents the figure realizing the 3rd embodiment of the present invention, is the air bag module cut off by the middle body of vehicle-width direction by the air bag of unexpansive expansion, the cross-sectional side view represented together with seat and passenger.

Figure 19 represents in the 3rd embodiment, is the part oblique drawing of the state on the top of the air bag module of unexpansive deployed condition from forward observation air bag tiltedly.

Figure 20 is the fragmentary cross-sectional view of the profile construction of the partition member of the 20-20 line represented along Figure 18 etc.

Figure 21 represents in the 3rd embodiment, with the part oblique drawing of part near the pressure regulating valve on the partition member of plane tensioning.

Figure 22 A is the instruction diagram of the action of the pressure regulating valve representing the 3rd embodiment.

Figure 22 B is the instruction diagram of the action of the pressure regulating valve representing the 3rd embodiment.

Figure 22 C is the instruction diagram of the action of the pressure regulating valve representing the 3rd embodiment.

Figure 23 is the figure representing the 4th embodiment the present invention specialized, and is the air bag module cut off by the middle body of vehicle-width direction by the air bag of unexpansive expansion, the cross-sectional side view represented together with seat and passenger.

Figure 24 is the fragmentary cross-sectional view of the profile construction of the partition member of the 24-24 line represented along Figure 23 etc.

Figure 25 represents in the 4th embodiment, with the part oblique drawing of part near the pressure regulating valve on the partition member of plane tensioning.

Figure 26 A is the instruction diagram of the action of the pressure regulating valve representing the 4th embodiment.

Figure 26 B is the instruction diagram of the action of the pressure regulating valve representing the 4th embodiment.

Figure 26 C is the instruction diagram of the action of the pressure regulating valve representing the 4th embodiment.

The figure of condition when Figure 27 is the outer joint portion for illustration of the partition member set in the 5th embodiment the present invention specialized is the cross-sectional side view representing the air bag module that the air bag of unexpansive deployed condition is cut off by vehicle-width direction middle body.

Figure 28 represents in the 5th embodiment, the cross-sectional side view of the air bag module that the air bag of unexpansive deployed condition is cut off by the middle body of vehicle-width direction.

Figure 29 is the figure representing the 6th embodiment the present invention specialized, and is the cross-sectional side view that the air bag module cut off by vehicle-width direction middle body by the air bag of unexpansive deployed condition represents together with seat and passenger.

Figure 30 represents in the 6th embodiment, is the part oblique drawing of the state on the top of the air bag module of unexpansive deployed condition from oblique rear observation air bag.

Figure 31 is the fragmentary cross-sectional view of the profile construction of the partition member of the 31-31 line represented along Figure 29 etc.

Figure 32 is the fragmentary cross-sectional view of the profile construction of the partition member of the 32-32 line represented along Figure 29 etc.

Figure 33 represents in the 6th embodiment, with the part oblique drawing of part near the pressure regulating valve on the partition member of plane tensioning.

Figure 34 represents in the 6th embodiment, air bag expand and partition member with the in-built longitudinal diagram of the air bag module of plane tensioning.

Figure 35 schematically represents in the 6th embodiment, the top plan view of the state that the upstream side bulge internal pressure-regulating valve in expansion cuts out.

Figure 36 is schematically illustrated in the 6th embodiment, the reversion of two valve body and in the bulge of downstream the top plan view of the state of valve closing.

Figure 37 is schematically illustrated in the 6th embodiment, the top plan view of state pressure regulating valve being opened in the bulge of downstream due to the external force with passenger restraint.

Figure 38 represents the figure realizing the 7th embodiment of the present invention, is the air bag module cut off by vehicle-width direction middle body by the air bag of unexpansive deployed condition, the cross-sectional side view represented together with seat and passenger.

Figure 39 A is the fragmentary cross-sectional view of the profile construction of the partition member of the 39A-39A line represented along Figure 38 etc.

Figure 39 B is the fragmentary cross-sectional view of the profile construction of the partition member of the 39B-39B line represented along Figure 38 etc.

Figure 40 represents in the 7th embodiment, with the part oblique drawing of part near the pressure regulating valve on the partition member of plane tensioning.

Figure 41 A is the part oblique drawing representing another example being made up of the partition member of the 1st embodiment piece of cloth sheet.

Figure 41 B is the part oblique drawing representing another example being made up of the partition member of the 1st embodiment piece of cloth sheet.

Figure 42 is the part oblique drawing representing another example being made up of the pressure regulating valve of the partition member of the 6th embodiment piece of cloth sheet.

Figure 43 A is the lateral plan representing another example applying the present invention to the side air bag device dissimilar with the 1st to the 5th embodiment.

Figure 43 B is the lateral plan representing another example applying the present invention to the side air bag device dissimilar with the 1st to the 5th embodiment.

Figure 44 A is the lateral plan representing another example applying the present invention to the side air bag device dissimilar with the 1st to the 5th embodiment equally.

Figure 44 B is the lateral plan representing another example applying the present invention to the side air bag device dissimilar with the 1st to the 5th embodiment equally.

Figure 45 A is the lateral plan representing another example applying the present invention to the side air bag device dissimilar with the 1st to the 5th embodiment equally.

Figure 45 B is the lateral plan representing another example applying the present invention to the side air bag device dissimilar with the 1st to the 5th embodiment equally.

Figure 46 is the figure representing another example applying the present invention to air bag device for knee protection, is to be provided with the partial side elevation view partly represented together with passenger's lower limb near the jociey stick of this air bag.

Figure 47 represents that, in another example of Figure 46, air bag is the front elevation of the air bag module of unexpansive deployed condition.

Figure 48 is the figure of another example of the outer joint portion of the partition member represented in the 5th embodiment, is the cross-sectional side view representing the air bag module that the air bag of unexpansive deployed condition is cut off by vehicle-width direction middle body.

Figure 49 represents realizing in the 8th embodiment of the present invention, by the lateral plan that the seat being provided with side air bag device represents together with passenger.

Figure 50 represents in the 8th embodiment, the top plan view of the position relationship of seat, passenger and Vehicular side body.

Figure 51 represents that a part is retained in back of seat by air bag, and ejects from seat and launch the partial top section-drawing of the state expanded.

Figure 52 is the air bag module cut off by vehicle-width direction middle body by the air bag of unexpansive deployed condition, the cross-sectional side view represented together with seat and passenger.

Figure 53 is the figure representing the 8th embodiment, is the part oblique drawing representing part near the pressure regulating valve on partition member.

Figure 54 represents in the 9th embodiment, the schematic diagram of modeled upstream side bulge as ellipsoid.

Figure 55 represents in the 9th embodiment, about the characteristic map of the relation of the ratio of the outer shape of bulge, tension force and Tension Difference.

Detailed description of the invention

(the 1st embodiment)

Below, referring to figs. 1 through Figure 13, the 1st embodiment the present invention being embodied as vehicle side air bag device is described.

In addition, in following record, using the working direction of vehicle as front, the direction of retreat of vehicle is described as rear.In addition, the above-below direction in following record represents the above-below direction of vehicle, and left and right directions represents the vehicle-width direction of vehicle, and left and right directions when advancing with vehicle is consistent.

As shown in Figures 2 and 3, on vehicle 10, inside the car of Vehicular side body 11, configure seat 12 near (right side of Fig. 2, the upside of Fig. 3).Here, so-called Vehicular side body 11 refers to the vehicle component parts of the sidepiece being configured at vehicle 10, and it is mainly equivalent to car door, pillar.Such as, corresponding with front stall Vehicular side body 11 is Qianmen, center pillar (B post).In addition, corresponding with back seat Vehicular side body 11 is the rear portion at side door (back door), C post, the front portion of tyre gaiter, rear side post.

Seat 12 is configured to, there is Chain cushion (portion of taking one's seat) 13 and back of seat (backrest) 14, this back of seat 14 erects from the rear side of above-mentioned Chain cushion 13, and utilizes tilt adjusting mechanism (diagram is omitted) adjustment angle of inclination.

Below, the internal structure for the sidepiece outside the car on back of seat 14 is described.

The seat frame of its skeleton is configured as in back of seat 14.As shown in Figure 4, be configured in (being downside in the diagram) part outside the car in back of seat 14, this part (hereinafter referred to as " side frame part 15 ") is by being formed metal sheet bending machining for a part for seat frame.In the front side of seat frame comprising side frame part 15, configure the seat cushion 16 be made up of isocyanurate foam elastomeric material.In addition, the backboard 17 of the hard formed by synthetic resin etc. is configured at the rear side of seat frame.And seat cushion 16 is coated by epidermis, but omit the diagram of this epidermis in the diagram.Also identical for Figure 13 described later.

In seat cushion 16, near outside the car of side frame part 15, resettlement section 18 is set.The position of resettlement section 18 is the oblique rear of the passenger P sat on seat 12 neighbouring (with reference to Fig. 3).In this resettlement section 18, assemble air bag module AM, this air bag module AM forms the main portion of side air bag device.

Outside the car of resettlement section 18 and the bight of front side, outside oblique front truck, extend slit 19.By the bight 16C on front side of seat cushion 16 and the position clamped by slit 19 (position surrounded by the frame of long and two-short dash line in the diagram), form the fracture reservations 21 utilizing air bag 40 described later and fracture.

Be assembled in the air bag module AM in above-mentioned back of seat 14, there is inflator assemblies 30 and air bag 40 as main composition parts.

Below, these two component parts are described respectively.Here, in the 1st embodiment, when mentioning " above-below direction " " fore-and-aft direction " about air bag module AM and component parts thereof, as shown in Figure 1, with the back of seat 14 of seat 12 for benchmark.The direction that back of seat 14 is erected as " above-below direction ", using the thickness direction of back of seat 14 as " fore-and-aft direction ".Usually, because back of seat 14 uses with a certain amount of state of tilted rearward, so " above-below direction " is not strictly vertical direction, but it is a certain amount of to tilt.Similarly, " fore-and-aft direction " is not strictly horizontal direction, but it is a certain amount of to tilt.

< inflator assemblies 30>

As shown in Figures 4 and 5, inflator assemblies 30 is configured to, and has the charging blower 31 producing source as gas and the retainer 32 be arranged on outside this charging blower 31.In the 1st embodiment, as charging blower 31, use the type being called as thermomotive.Charging blower 31 is roughly cylindric, and collecting therein produces the gas producing agent (diagram is omitted) of expanding gas.In an end (being bottom in the 1st embodiment) of the long side direction of charging blower 31, connect the wire harness (diagram slightly) as the additional distribution transmitted control signal to this charging blower 31.

And, as charging blower 31, also can replace the thermomotive using above-mentioned gas to produce agent, and use following type: utilize gunpowder to destroy the dividing plate being filled with the high pressure gas storage tank of high pressure gas, make it spray gas (mixed type).

On the other hand, retainer 32 is following parts: work as diffuser, and has the function be fastened to together with air bag 40 by above-mentioned charging blower 31 on side frame part 15.The major part of retainer 32 is formed as roughly tubular by the sheet materials such as metal sheet are carried out such as bending machining.Retainer 32 arranges window portion 33, from a large amount of expansion gases that charging blower 31 sprays, is sprayed to the outside of retainer 32 by this window portion 33.

On retainer 32, as the latch for printed circuit for being arranged on above-mentioned side frame part 15, fixing many bolts 34.In other words, be that many bolts 34 are fixed on charging blower 31 indirectly via retainer 32.

In addition, inflator assemblies 30 also can be the structure that charging blower 31 and retainer 32 are integrally formed.

< air bag 40>

As shown in Figure 1 to Figure 3, air bag 40 vehicle 10 medium the hitting due to side of driving process and when impact is applied to Vehicular side body 11 from side, accept the supply of expansion gas G from charging blower 31.Accept the air bag 40 that this expansion gas G supplies; under the state making the part (rear portion) of himself be retained in above-mentioned resettlement section 18; from this resettlement section 18 to roughly front ejection; launch by expanding between the upper part of the body being seated at the passenger P on seat 12 and Vehicular side body 11, the upper part of the body of protection passenger P avoids the impact being subject to hitting above-mentioned side.

Fig. 5 is the air bag module AM non-for air bag 40 filling expansion gas G being expanded into plane state (hereinafter referred to as " unexpansive deployed condition "), represents together with passenger P and seat 12.In addition, Fig. 6 is the internal structure in order to represent air bag module AM, by the air bag module AM that the air bag 40 of the unexpansive deployed condition of Fig. 5 is cut off by the middle body of vehicle-width direction, represents together with seat 12 and passenger P.The position surrounded by the great circle frame W of single dotted broken line in Fig. 6, amplifies the position representing and surrounded by roundlet frame W.

As shown in Figures 5 and 6, air bag 40, by making 1 piece of pieces of cloth 41 (also referred to as base cloth, filler rod cloth etc.) along being set in broken line 42 doubling of its middle body, overlaps at vehicle-width direction, becomes bag-shaped mode combine and formed to make this intersection.Here, in order to distinguish two parts of the above-mentioned coincidence of air bag 40, the part be positioned at inside car being called cloth portion 43 (with reference to Fig. 6), the part be positioned at outside car being called cloth portion 44 (with reference to Fig. 5).

In addition, in the 1st embodiment, to make broken line 42 be positioned at the mode of air bag 40 front end by pieces of cloth 41 doubling, but also can according to make broken line 42 be positioned at another end, such as rearward end mode by pieces of cloth 41 doubling.In addition, air bag 40 also can be made up of the two pieces of pieces of cloth split along broken line 42.In this case, air bag 40 overlaps at vehicle-width direction by making two pieces of pieces of cloth, makes these two pieces of pieces of cloth combine at its circumference and be formed as bag-shaped.In addition, air bag 40 also can be made up of the pieces of cloth being more than or equal to three pieces.

As mentioned above, plane air bag 40 is become when unexpansive deployed condition also referred to as " planar air bag ".

On air bag 40, the outer shape in two pieces of cloth portions 43,44 is with the relation of broken line 42 for axis of symmetry and each other line symmetry.Shape and the size in each cloth portion 43,44 are set as, make air bag 40 expand between seat 12 and Vehicular side body 11 launch time, the region corresponding with the upper part of the body of the passenger P be seated on this seat 12 can be occupied.

As above-mentioned cloth portion 43,44, working strength is high and have flexibility and easily folding material, such as polyethylene kind, the fabric formed such as polyamide-based.

The above-mentioned combination in two cloth portions 43,44, realizes at periphery joint portion 45 place being arranged at its circumference.In the 1st embodiment, namely periphery joint portion 45 is formed with suture by the part except posterior end portion and leading section (the neighbouring part of broken line 42) in the circumference in two cloth portions 43,44 being made.

Make about this, in accompanying drawing such as Fig. 5 to Fig. 7, Fig. 9, Figure 10 and Figure 14, Figure 16, Figure 18, Figure 19, Figure 21, Figure 23, Figure 25, Figure 27, Figure 28, Figure 41 A, Figure 41 B, Figure 47 and Figure 48, showed by 2 kinds of line styles and make part.A kind of line style is the line (one of dotted line) represented with arranging intermittently by the thick line of certain length, and this represents the state (with reference to Fig. 5 etc.) of the suture in the outside (between non-cloth portion) becoming the cloth portion sewing up object.Another kind of line style is the line (one of dotted line) making a little to represent with arranging at certain intervals, and this represents the state (with reference to Fig. 6 etc.) of the suture of the inner side (between cloth portion) becoming the cloth portion sewing up object.That is, show the figure made in the mode of the latter, represent that edge is through the profile construction making section partly.

As shown in Figures 5 and 6; between two cloth portions 43,44; and the space surrounded by periphery joint portion 45 (being in a ratio of the space of inner side with periphery joint portion 45); become by utilizing expansion gas G (with reference to Fig. 1 etc.) to expand near the outside of the upper part of the body of passenger P, thus avoid for the protection of it the bulge 46 that impacted above the waist.

In addition, periphery joint portion 45 also by the mode different from using the stitching of above-mentioned suture, such as, can use the bonding of lining cement and is formed.This point for outer joint portion 54,55 described later and interior joint portion 63 also identical.

The attitude that above-mentioned inflator assemblies 30 tilts in the mode lower the closer to front side, is configured in the rear end lower in air bag 40.Further, in the cloth portion 43 that the bolt 34 of retainer 32 is inserted into inside car (with reference to Fig. 4).By inserting in this manner, with the state locking making inflatable component 30 locate relative to air bag 40.In addition, the lower end, rear portion of air bag 40, relative to the bottom of inflatable component 30, utilizes the attaching parts 37 of ring-type to engage with airtight conditions.

The bulge 46 of air bag 40 is divided into by partition member 50: the upstream side bulge 47 being supplied to the expansion gas G from charging blower 31; And the downstream bulge 48 of expansion gas G is supplied to via upstream side bulge 47.Partition member 50 has the structure identical with the structure being commonly referred to frenulum, uses and is formed with the cloth portion 43 of air bag 40,44 identical materials.

Fig. 7 represents that from oblique rear observation air bag 40 be the state of the part on the top of the air bag module AM of unexpansive deployed condition, and Fig. 8 represents the profile construction of the 8-8 line along Fig. 5.In this Fig. 8, each component omission thickness represents, and interior joint portion 63 represents with zigzag.This point is also identical in Figure 15, Figure 20 and Figure 24 described later.Fig. 9 represents that air bag 40 expands and makes partition member 50 with the internal structure of the air bag module AM of plane tensioning.In addition, Figure 10 A represents a part for the partition member 50 of flexion, and Figure 10 B represents with the centre portion P1 of the partition member 50 of plane tensioning and neighbouring part thereof.As shown in this Fig. 7 to Figure 10 A, Figure 10 B, partition member 50 by turning back along the broken line 51 extended roughly along the vertical direction, thus makes opposed end 52,53 in opposite directions become to be positioned at approximating doubled state.The partition member 50 of this doubled state, with the state making broken line 51 be positioned at upstream side compared with two opposed ends 52,53, is configured in (with reference to Fig. 8) in the bulge 46 of unexpansive deployed condition.

Above-mentioned partition member 50 with bulge 46 expansion and to become strip shape during plane tensioning, namely, make the length L1 in the direction (hereinafter referred to as " long side direction ") along broken line 51, be longer than the length L2 (with reference to Fig. 6, Fig. 9) in the direction (hereinafter referred to as " short side direction ") orthogonal with broken line 51.

The partition member 50 of doubled state, respectively at two opposed ends 52,53 place, by the outer joint portion 54,55 extended along roughly vertical direction (long side direction), is combined with two cloth portions 43,44 of air bag 40.Two outer joint portions 54,55, when bulge 46 expands, in the position becoming the side at the middle part on fore-and-aft direction of the upper part of the body of passenger P, are combined with the cloth portion 43,44 of each opposed end 52,53 corresponding to partition member 50 (with reference to Fig. 3).

Thus, partition member 50 is by between the cloth portion 44 of lodge inside the car of air bag 40 outside cloth portion 43 and car.Partition member 50 is the state (with reference to Fig. 7, Fig. 8) of doubling when bulge 46 is unexpansive.In addition, partition member 50, when bulge 46 expands, to become at vehicle-width direction with the state of plane tensioning (with reference to Fig. 9, Figure 10 B), limits the thickness of the vehicle-width direction of this bulge 46.

In addition, the partition member 50 of doubled state, at the both ends in the direction (long side direction) along broken line 51, is combined with air bag 40.That is, the upper end of the partition member 50 of doubled state and bottom are by above-mentioned periphery joint portion 45 (with reference to Fig. 6, Fig. 7, Fig. 9), be combined, namely make together with the upper end in two cloth portions 43,44 of air bag 40 and bottom.

As shown in Figures 5 and 6, by above-mentioned partition member 50, bulge 46 is separated into the upstream side bulge 47 of rear side and the downstream bulge 48 of front side, above-mentioned upstream side bulge 47 forms the latter half of bulge 46, and configuration inflator assemblies 30, above-mentioned downstream bulge 48 forms the first half of this bulge 46, and does not configure inflator assemblies 30.

In the 1st embodiment, partition member 50 is as shown in Figure 10 A, 10B, and 2 parts 56,57 arranged by direction and the roughly vertical direction (long side direction) along broken line 51 are formed.On upper and lower two parts 56,57, with the state making ora terminalis 58E, 59E of its end 58,59 be in alignment with each other, end 58,59 is overlapped with band shape.Upper and lower two parts 56,57, forming the boundary portion office between banded a pair coincidence part 61 and other positions (hereinafter referred to as " non-coincidence portion 62 ") respectively, are combined by the interior joint portion 63 extended to the direction (short side direction) roughly orthogonal with broken line 51.This boundary member leaves certain distance from above-mentioned ora terminalis 58E, 59E.

Divide in the substantially central portion of above-mentioned partition member 50 and pressure regulating valve 70 is set.The Primary closure of pressure regulating valve 70 during the supply supplying expansion gas G to bulge 46, confined expansion gas G circulates from upstream side bulge 47 to downstream bulge 48, from the midway during this supply, utilization is externally applied forces valve opening with the constraint of passenger, removes above-mentioned restriction.

Below, the structure for this pressure regulating valve 70 is described, and above-mentioned interior joint portion 63 is removed at its part (crossing over the part of broken line 51 in the 1st embodiment) place and combined.In other words, on the boundary member between two coincidence parts 61 and non-coincidence portion 62, crossing over the part place of broken line 51, the interior joint portion 63 that upper and lower two parts 56,57 are combined is not set.Namely the above-mentioned part not arranging interior joint portion 63 combines by the position of removing, and extends along short side direction, forms the inner opening portion 71 of the slit-shaped that upstream side bulge 47 is communicated with downstream bulge 48.

The part (neighbouring part) corresponding with inner opening portion 71 of coincidence part 61, forms a pair valve body 73,74.More precisely, form valve body 73 by the part between inner opening portion 71 and ora terminalis 58E, form valve body 74 by the part between this peristome 71 and ora terminalis 59E.By make two valve body 73,74 at it at least partially, such as leading section 73T, 74T contact with each other, thus expansion between restriction two valve body 73,74 circulation (with reference to Figure 11 B) of gas G.In addition, by making the entirety of valve body 73 leave from the entirety of valve body 74, can make expansion gas G between two valve body 73,74, circulate (with reference to Figure 11 C).

In addition, as mentioned above, two coincidence parts 61 with two valve body 73,74, before bulge 46 expands, are configured in upstream side bulge 47.

Further, two the boundary portion offices of coincidence part 61 between non-coincidence portion 62, upward or below (above in the 1st embodiment being) bending, overlapping with non-coincidence portion 62.In addition, two coincidence parts 61 of the band shape of bending, at the both ends in the direction (short side direction) along interior joint portion 63, combined by the corresponding cloth portion 43,44 of above-mentioned joint portion 54,55 and air bag 40 and partition member 50 (non-coincidence portion 62), namely make together (with reference to Fig. 6, Fig. 8).

As shown in Figure 4, there is air bag 40 and the inflator assemblies 30 above-mentioned air bag module AM as main composition parts, by making the air bag 40 (with reference to Fig. 5) of unexpansive deployed condition folding, become compressive state (hereinafter referred to as " collecting state ").This is to make air bag module AM relative to the resettlement section 18 of size limited on back of seat 14, becomes the structure being suitable for accommodating.

The air bag module AM of above-mentioned collecting state, to make inflator assemblies 30 be positioned at rear side, and makes the major part of air bag 40 be positioned at the state of front side, is configured in the resettlement section 18 of back of seat 14.Further, as mentioned above, to extend and the bolt 34 inserted air bag 40 (cloth portion 43) is inserted in side frame part 15 from retainer 32, and fastening by nut 36.Fastening by this, inflator assemblies 30 is fixed on side frame part 15 together with air bag 40.

In addition, inflator assemblies 30 also can utilize and be fixed on vehicle 10 (side frame part 15) with above-mentioned bolt 34 and nut 36 diverse ways.

As shown in Figure 1, side safety air bag, except above-mentioned air bag module AM, also has shock transducer 75 and control setup 76.Shock transducer 75 is made up of acceleration pick-up etc., is arranged on the Vehicular side body 11 (with reference to Fig. 2 and Fig. 3) of vehicle 10 etc., detects the impact be applied to from side this Vehicular side body 11.Control setup 76, according to the detection signal from shock transducer 75, controls the action of charging blower 31.

As mentioned above, the side air bag device of the 1st embodiment is formed.Below, for the representative pattern of this side air bag device, be described with reference to Figure 11 A to 11C.This Figure 11 A to Figure 11 C schematically represents the form of pressure regulating valve 70 time dependent situation after expansion gas G supply starts, and omits and simplify for thin portion.In addition, Figure 12 represents the load that the pressure (interior pressure) of the expansion gas G in each bulge 47,48 in upstream side and downstream, the compression area of each bulge 47,48 side of passenger P and passenger P are subject to from air bag 40, corresponds to the inlet of the Vehicular side body 11 entered inside car due to impact and how to change.Load is by the product representation of interior pressure and compression area.

In this side air bag device, when not applying to impact from side to vehicle 10 because side is hit, do not export the actuating signal for making its action from control setup 76 to charging blower 31, thus do not supply expansion gas G from charging blower 31 to bulge 46 (upstream side bulge 47).Air bag 40 continues to be housed in (with reference to Fig. 4) in resettlement section 18 with collecting state together with inflator assemblies 30.Now, in air bag 40, two cloth portions 43,44 closer to each other.Partition member 50 becomes the doubled state making broken line 51 be positioned at upstream compared with opposed end 52,53.Two valve body 73,74 overlap in upstream side bulge 47.The inlet (stroke) of Vehicular side body 11 is " 0 ".The interior pressure all very low (being roughly barometric pressure) of each bulge 47,48, compression area and load are " 0 ".

On the other hand, if in the driving process of vehicle 10, hit due to side and apply to be more than or equal to the impact of specified value to Vehicular side body 11, this impact being detected by shock transducer 75, then according to this detection signal, export the actuating signal for making its action from control setup 76 to charging blower 31.Using the inlet of Vehicular side body 11 now as ST0.Corresponding with this actuating signal, in charging blower 31, gas producing agent produces the expansion gas G of High Temperature High Pressure.First this expansion gas G is supplied to upstream side bulge 47, and this upstream side bulge 47 starts to expand.

In bulge 46, the partition member 50 of doubled state configures with the state making broken line 51 be positioned at upstream side compared with opposed end 52,53.And this partition member 50, at each opposed end 52,53 place, is combined with the corresponding cloth portion 43,44 of air bag 40 (with reference to Fig. 7, Fig. 8) by outer joint portion 54,55.In addition, partition member 50, respectively at the both ends (upper end and bottom) in the direction along broken line 51, is combined with two cloth portions 43,44 (with reference to Fig. 6, Fig. 7) by periphery joint portion 45.Therefore, if make upstream side bulge 47 start to expand in the manner described above, then the partition member 50 of doubled state is stretched.For partition member 50, apply tension force along the direction (long side direction) of broken line 51 or the direction orthogonal with it (short side direction), partition member 50 becomes flat state (with reference to Fig. 9).

But, on partition member 50, be not that its entirety becomes tensioning state equably.This is because, according to above-mentioned partition member 50 and cloth portion 43,44 combination, elevation profile when upstream side bulge 47 expands as shown in Figure 9, near upper and lower both ends, part curvature is comparatively large, the substantially elliptical that the longitudinal direction that other part curvature are less is long.Because be the section of this irregularly shaped (non-circular), so at the top P2 of partition member 50 and bottom P3, compared with the part (centre portion P1) between it, be not vulnerable to stretch.Therefore, the top P2 of partition member 50 and bottom P3, when centre portion P1 becomes the tensioning state of roughly planar, be still in the flexion (state just slightly opened than doubled state) (with reference to Figure 11 A) that broken line 51 is positioned at upstream side compared with opposed end 52,53.

Relative to two valve body 73,74 being positioned at upstream side bulge 47, pressure PI in applying from the both sides in its overlapping direction (thickness direction).This interior pressure PI is so high when not having bulge 46 couples of passenger P to retrain.Two valve body 73,74 utilize this interior pressure PI to be close to each other in whole, become the self-enclosed state that confined expansion gas G circulates between two valve body 73,74.In addition, be bent and the coincidence part 61 that overlaps with the non-coincidence portion 62 of partition member 50, pressure PI in utilizing and pressing to this non-coincidence portion 62 (with reference to Figure 11 A).Due to these situations, two valve bodies 73,74 are more prone to closed.

Here, as shown in Figure 9, partition member 50 is formed as, long side direction (roughly vertical direction) longer than short side direction (L1>L2).Thus, at the above-mentioned centre portion P1 of partition member 50, easily short side direction is applied to the tension force be better than long side direction.In the 1st embodiment, because inner opening portion 71 extends, so inner opening portion 71 easily closes along easily applying this short side direction compared with high tension.

But although have the strong or weak relation of above-mentioned tension force, because also apply tension force at the long side direction that inner opening portion 71 will be made to open, so inner opening portion 71 might not reliably close, inner opening portion 71 also may open.But even if in this case, two valve body 73,74 are also at least closed at self leading section 73T, 74T.This is because, even if make inner opening portion 71 tension by making centre portion P1 tensioning, apply the application force making it open, this application force is also maximum at place of inner opening portion 71, reduce gradually along with leaving from inner opening portion 71, minimum at leading section 73T, 74T place of two valve body 73,74.

In addition, in the 1st embodiment, to the coincidence part 61 that non-coincidence portion 62 bends, at the both ends in the direction (short side direction) along interior joint portion 63, be combined with cloth portion 43,44 together with opposed end 52,53 (with reference to Figure 10 B) by outer joint portion 54,55.Therefore, when upstream side bulge 47 expands, be not only and the stronger tension force of short side direction is applied to the centre portion P1 of partition member 50, the stronger tension force in this direction is also applied to coincidence part 61.

If two valve body 73,74 at least contact with each other in a part, then pressure regulating valve 70 becomes the state of valve closing, and the expansion gas G in upstream side bulge 47 is limited to be flowed out to downstream bulge 48 by two valve body 73,74 and inner opening portion 71.

By above-mentioned restriction, in upstream side bulge 47, store expansion gas G, after exceeding inlet ST0, only press off in upstream side bulge 47 and begin to rise.

In the 1st embodiment, because bulge 46 is divided into upstream side bulge 47 and downstream bulge 48 by partition member 50, so the volume of upstream side bulge 47, be less than the volume of its bulge of (prior art 1 is suitable with this situation) when bulge 46 is not separated.Therefore, start compared with when the interior pressure of upstream side bulge 47 is not separated with bulge 46 to rise fast, and rise get Geng Gao.Especially, the expansion gas G in upstream side bulge 47 allows only circulation between two valve body 73,74, and can not flow to downstream bulge 48 via between two valve body 73,74.Therefore, will because of the above-mentioned outflow of expansion gas G, and the ascending velocity of the interior pressure of upstream side bulge 47 be reduced.

And now, air bag 40 (bulge 46) does not also contact with passenger P, and therefore, compression area and load all still remain " 0 ".

Further, by the above-mentioned expansion of upstream side bulge 47, folded state is removed with the order that the order folding with this upstream side bulge 47 is contrary.If upstream side bulge 47 removes folded state (expansion) while expand, then the seat cushion 16 of back of seat 14 is pressed by air bag 40, in fracture reservations 21 (with reference to Fig. 4) place's fracture.Air bag 40 as shown in figure 13, a part (part near inflator assemblies 30) to be retained in the state in back of seat 14, by the position of fracture, ejects from this back of seat 14.

Then, the upstream side bulge 47 being supplied to expansion gas G as shown in Figures 2 and 3, Vehicular side body 11 and be seated at the passenger P on seat 12 the upper part of the body latter half of between, forwards remove folded state expansion on one side.

When the inlet of Vehicular side body 11 reaches ST1, then due to this Vehicular side body 11, bulge 46 starts the upper part of the body pressing passenger P.Because bulge 46 only has upstream side bulge 47 to expand, passenger P bears the pressure of bulge 46, while make the position contacted only have upstream side bulge 47.Therefore, passenger P bears the area (compression area of upstream side bulge 47 side) on the surface of the pressure of bulge 46, identical, all less with the area (compression area of upstream side bulge 47) on surface of the pressure bearing upstream side bulge 47.But carrying out, i.e. inlet that the compression area of this upstream side bulge 47 enters inside car along with the Vehicular side body 11 corresponding to the impact that side is hit increase and increase.

The impact load that passenger P is subject to by bulge 46, also along with compression area and interior pressure increase and increase.As mentioned above, because the interior pressure of upstream side bulge 47 comparatively early starts to rise, load starts the inlet ST1 increased, little compared with starting with (prior art 1) load when bulge 46 is not separated the inlet ST10 that increases.In other words; with bulge 46 without compared with (prior art 1) when separating; load starts to increase in timing comparatively early, with the amount of doing sth. in advance correspondingly, reach and avoid for the protection of passenger P the specified value β (with reference to Figure 12) that impacted above the waist.

Under the state that two valve body 73,74 are close to (closedown) with its whole face, continue upstream side bulge 47 interior supply expansion gas G, on the other hand, when the inlet of Vehicular side body 11 reaches ST2, utilize from this Vehicular side body 11 externally applied forces, press in upstream side bulge 47 and rise to value α, then pressure regulating valve 70 starts valve opening.

That is, from the midway supplied to bulge 46 during expansion gas G, with increasing the external force of the constraint of passenger, bulge 46 is pressed and is out of shape, the tension variation that separating part 50 bears.In addition, with the above-mentioned distortion of bulge 46, the interior pressure of upstream side bulge 47 rises further, and the centre portion P1 of partition member 50 is pressed (with reference to Figure 11 B) to downstream bulge 47, the tension variation that this centre portion P1 bears.In addition, due to the above-mentioned interior pressure risen, top P2 and the bottom P3 of partition member 50 are pressed, and are out of shape in the mode expanded to downstream bulge 48.As mentioned above, top P2 and bottom P3, before passenger restraint, becomes the flexion (with reference to Figure 11 A) making broken line 51 be positioned at upstream side compared with end 52,53.When passenger restraint, top P2 and bottom P3 is deformed into the shape of reversing from the shape (long and two-short dash line with reference to Figure 11 B) before passenger restraint.Due to this alteration of form (reversion) of top P2 and bottom P3, easily on centre portion P1, there is tension variation.Further, due to this tension variation, allow the distortion in the inner opening portion 71 being positioned at centre portion P1, allow the action of the valve body 73,74 being positioned at this centre portion P1.

Now, by the above-mentioned reversion of top P2 and bottom P3, the region that partition member 50 bears tension force is expanded along the vertical direction.Upper side member 56 tension force upward for partition member 50 is comparatively strong, stronger for lower side member 57 tension force downward.Due to the change of these two kinds of tension force, inner opening portion 71 tension along the vertical direction of slit-shaped, easily opens.

On the other hand, coincidence part 61 is overlapping with non-coincidence portion 62, at the both ends in the direction along interior joint portion 63, is combined with the cloth portion 43,44 of air bag 40 by outer joint portion 54,55.Therefore, close to the part of outer joint portion 54,55 on coincidence part 61, the power maintaining coincidence status is very strong.But this power reduces along with leaving from outer joint portion 54,55, and at the middle body in the direction along interior joint portion 63, namely two valve body 73,74 places are minimum.Therefore, the coincidence part 61 be stretched along the vertical direction, only valve body 73,74 and near part be out of shape along the vertical direction.

If inner opening portion 71 opens to a certain degree along the vertical direction, then at coincidence part 61 place, in the height bearing upstream side bulge 47, only press two valve body 73,74 place of PI, be forced out (reversion) to downstream bulge 48 through inner opening portion 71.When the width W 1 of the above-below direction in this inner opening portion 71 is narrower, leading section 73T, 74T contact with each other, and two valve body 73,74 are closed (with reference to Figure 11 B) at leading section 73T, 74T.This state during the above-mentioned width W 1 in inner opening portion 71 is less than the aggregate value (=2W2) of the width W 2 (with reference to Figure 11 C) of each valve body 73,74 in lasting.

Further, if the width W 1 in inner opening portion 71 is greater than this aggregate value (=2W2), then leading section 73T, 73T is separated (with reference to Figure 11 C).Pressure regulating valve 70 becomes the state of valve opening, and above-mentioned restriction is removed.By this restriction cancellation, the expansion gas G in upstream side bulge 47 successively by between inner opening portion 71 and two valve body 73,74, can flow out to downstream bulge 48.

By the outflow of this expansion with gas G, the interior pressure of upstream side bulge 47 becomes reduction from rising.But because Vehicular side body 11 still continues to enter inside car, bulge 46 presses passenger P at upstream side bulge 47, so the compression area of passenger P and upstream side bulge 47 continues to increase.

In addition, after inlet ST2, make downstream bulge 48 start to expand due to expansion gas G, the interior pressure of this downstream bulge 48 then starts to rise thereupon.In addition, liter is pressed in being slightly later than, inlet reaches ST3, but by the Vehicular side body 11 entered inside car, on the basis of upstream side bulge 47, downstream bulge 48 contacts with passenger P and presses it, and the area (compression area of downstream bulge 48 side) that this passenger P is subject to the face of the pressure of downstream bulge 48 starts to increase.

In addition, be pressed in the interior pressure of upstream side bulge 47 and downstream bulge 48 inlet (stroke) reach ST4 after equal.

As mentioned above, after pressure regulating valve 70 opens (inlet is ST2), the internal drop of upstream side bulge 47 is low, presses liter in downstream bulge 48 simultaneously.In addition, the compression area of upstream side bulge 47 side of passenger P and the compression area of downstream bulge 48 side have the time difference and increase.Therefore, after inlet reaches ST2, the load that passenger P is subject to from whole bulge 46, namely the load be subject to from upstream side bulge 47 and the total of load be subject to from downstream bulge 48, lower than only forming air bag by a bulge and not arranging the maxim of the situation (prior art 1) of pressure regulating valve, and become the value (specified value β) keeping constant.

In addition, at the initial stage during expansion supplies with gas G, the load that passenger P is subject to from bulge 46 increases in early days, and then this load maintains lower specified value β substantially.Therefore, the amount of energy of bulge 46, and only forms air bag by a bulge and the amount of energy not arranging the situation (prior art 1) of pressure regulating valve is same degree.Stroke-the load character of the 1st embodiment, for prior art 1, be equivalent to, by the bulge supply expansion higher region (the part Q represented with upper right oblique line) of the load of the second half section during gas, transfer to the mode in the lower region of the load of the first half section during this supply (the part R represented with bottom right oblique line).Part Q is different with part R shape, but area is roughly the same each other.

By the above-mentioned expansion of downstream bulge 48, remove folded state with the order that the order folding with this downstream bulge 48 is contrary.Downstream bulge 48, between the forebody (chest PT) of the upper part of the body of Vehicular side body 11 and passenger P, forwards removes (expansion) folded state.

Thus, air bag 40 is between the upper part of the body of passenger P and the Vehicular side body 11 entered inside car.Pressed inside vehicle-width direction by this air bag 40 and retrain above the waist.Further, by Vehicular side body 11 to the impact from side of transmitting above the waist, relaxed by air bag 40, and protect this upper part of the body.

Here, apply Dent resistance impacting from side to the upper part of the body of passenger P, be usually better than forebody latter half of.Have spine this is because latter half of, rib is connected with spine at its rear portion, and in contrast, the position that the front portion of rib does not have intensity like this with above-mentioned spine is connected.Therefore, the expansion with air bag 40 launches, and pressure in the bulge 46 expecting to act on the upper part of the body of passenger P from side, at forebody lower than latter half of.

This point in the first embodiment, bulge 46 for fore-and-aft direction, with make partition member 50 forebody above the waist and latter half of between boundary member near mode expand.Under the state that bulge 46 expansion of air bag 40 launches, upstream side bulge 47 is positioned near latter half of side above the waist, and downstream bulge 48 is positioned at the side neighbouring (with reference to Fig. 3) of forebody.Therefore, caused by air bag 40 passenger P retrain the initial stage, passenger P above the waist in latter half of higher than forebody of Dent resistance, pressed by the upstream side bulge 47 that interior voltage rise is high in early days.In addition, at this constraint initial stage, the forebody that in the passenger P upper part of the body, Dent resistance is lower, is pressed by the downstream bulge 48 that interior pressure does not have upstream side bulge 47 high.

According to above the 1st embodiment described in detail, following effect can be obtained.

(1) be used in bulge 46 expansion and with plane tensioning time, the length L1 of long side direction is longer than the partition member 50 (Fig. 9) of the strip shape of the length L2 of short side direction.By to be arranged on partition member 50 and the inner opening portion 71 of the slit-shaped extended along short side direction closer to each other with the surrounding being arranged on inner opening portion 71/a pair valve body 73,74 of being separated, formation pressure regulating valve 70 (Figure 10).

Therefore, when upstream side bulge 47 expands, on partition member 50, utilize the stronger tension force applied to short side direction compared with long side direction to make pressure regulating valve 70 valve closing, the expansion gas G that can limit in upstream side bulge 47 flows out to downstream bulge 48.

In addition, when the external force with passenger restraint is applied on bulge 46, the interior pressure that upstream side bulge 47 can be utilized to rise makes partition member 50 be out of shape and make tension variation.In addition, between passenger P and Vehicular side body 11 (car door guard plate), air bag 40 is out of shape, and by air bag 40 distortion itself, can make the tension variation applied to partition member 50.By the change of the tension force of this partition member 50, the distortion in inner opening portion 71 and the action of two valve body 73,74 can be allowed.Open by making inner opening portion 71, utilize the interior pressure of upstream side bulge 47, two valve body 73,74 are extruded to downstream bulge 48 by its inner opening portion 71 and makes it reverse, above-mentioned restriction can be removed by making leading section 73T, 74T be separated, expansion gas G is flowed out to downstream bulge 48 from upstream side bulge 47.

Thus, according to the 1st embodiment, inner opening portion 71, a pair this simple and cheap structure of valve body 73,74 can be utilized, realize supplying the initial stage valve closing during expansion gas G to bulge 46, the pressure regulating valve 70 of the midway valve opening during this supply.By the action of this pressure regulating valve 70, the characteristic of the load upper part of the body of passenger P being subject to by air bag 40 can being made, for reaching specified value β at short notice, being then maintained specified value β, and suitably retrain and protect this suitable characteristic of passenger P.

(2) two valve body 73,74 are configured in upstream side bulge 47 place (Fig. 8) before bulge 46 expands.

Therefore, can when upstream side bulge 47 expand, and under state before passenger restraint, utilize the interior pressure PI of this upstream side bulge 47 that two valve body 73,74 are close to each other, realize self-enclosed state (Figure 11 A).

In addition, can when air bag 40 couples of passengers retrain, make coincidence part 61 only in the reversion of two valve body 73,74 place, by inner opening portion 71, it is extruded (Figure 11 B) to downstream bulge 48, make pressure regulating valve 70 valve opening (Figure 11 C).

(3) by making partition member 50 turn back along broken line 51, partition member 50 becomes end 52,53 relatively towards each other and is positioned at approximating doubled state.The partition member 50 of this doubled state is configured in the bulge 46 of unexpansive deployed condition with the state making broken line 51 be arranged in upstream compared with opposed end 52,53.In addition, partition member 50 is combined with the corresponding cloth portion 43,44 of air bag 40 by outer joint portion 54,55 at each opposed end 52,53 place, simultaneously at the both ends of long side direction (roughly vertical direction), be combined with above-mentioned two cloth portions 43,44 by periphery joint portion 45, namely make together (Fig. 6, Figure 10).

Therefore, when upstream side bulge 47 expands, top P2 and the bottom P2 of partition member 50 become flexion, that is, broken line 51 is positioned at upstream side (Figure 11 A) compared with opposed end 52,53.In addition, when the external force with passenger restraint is applied on bulge 46, the interior pressure PI utilizing upstream side bulge 47 to rise, above-mentioned top P2 and bottom P3 change (reversion) for broken line 51 and be positioned at the shape in downstream, namely contrary with before passenger restraint shape (Figure 11 B) compared with opposed ends 52,53.By this alteration of form, the tension force easily making partition member 50 (centre portion P1) be subject to changes, and can allow the distortion in inner opening portion 71 and the action of valve body 73,74.

Now, by the above-mentioned reversion of top P2 and bottom P3, the region that can make partition member 50 bears tension force expands to the both direction of long side direction (above-below direction), is stretched in the direction and makes it open (making pressure regulating valve 70 valve opening) in inner opening portion 71 and two valve body 73,74.

Especially, in the 1st embodiment, combine with the self-enclosed function of above-mentioned (2), leak tightness when simultaneously can realize pressure regulating valve 70 valve closing improve and valve opening time the circulation of expansion gas G improve.

(4) with the state making ora terminalis 58E, 59E of two parts 56,57 align, the end 58,59 of two parts 56,57 is overlapped as banded.In addition, by utilize be arranged between two coincidence parts 61 and non-coincidence portion 62 boundary member in joint portion 63, two parts 56,57 are combined, thus formation partition member 50.By making the combination of two parts 56,57 remove in a part for interior joint portion 63, thus form inner opening portion 71.Be set as two valve body 73,74 (Figure 10) in two coincidence parts 61 position corresponding with inner opening portion 71 (near part).

Therefore, by making the boundary member between the non-coincidence portion 62 of two parts 56,57 and two coincidence parts 61, to leave the combinations of states of a part, partition member 50, inner opening portion 71 and two valve body 73,74 once can be formed.Special operation can not be carried out to form inner opening portion 71 and two valve body 73,74.

Especially, two valve body 73,74 are integrated with partition member 50 one-tenth.More precisely, a valve body 73 is integrated with parts 56 one-tenth, and another valve body 74 is integrated with parts 57 one-tenth.Therefore, with two valve body 73,74 by compared with partition member 50 (parts 56, the 57) situation that independently parts are formed, number of components can be reduced.In addition, the operation that these parts and partition member 50 (parts 56,57) are combined can not be carried out.

(the 2nd embodiment)

Below, be described realizing the 2nd embodiment of the present invention with reference to Figure 14 to Figure 17.

In the 2nd embodiment, as shown in Figure 14 to Figure 16, comprise a pair coincidence part 61 of two valve body 73,74, be configured in downstream bulge 48 before bulge 46 expands, this respect is different from the 1st embodiment.Therefore, for the position identical with the 1st embodiment and parts, identical label is marked and detailed.In addition, the position surrounded by the great circle frame X of single dotted broken line in Figure 14, amplifies the position representing and surrounded by roundlet frame X.

In this case, the coincidence part 61 comprising two valve body 73,74 carries out the action slightly different from the 1st embodiment.

Partition member 50, before supplying expansion gas G to bulge 46, becomes the doubled state (with reference to Figure 14, Figure 15) that broken line 51 is positioned at upstream compared with opposed end 52,53.

If make upstream side bulge 47 start to expand by supplying expansion gas G to bulge 46, then the partition member 50 of doubled state is stretched as shown in FIG. 16 and 17, thus applies tension force to partition member 50 along long side direction or short side direction.Utilize this tension force, become the tensioning state of roughly planar at partition member 50 place centre portion P1, but top P2 and bottom P3 becomes the flexion making broken line 51 be positioned at upstream compared with opposed end 52,53.

Here, on the partition member 50 of relation meeting L1>L2, easily the tension force being better than long side direction (direction along broken line 51) is applied to short side direction (direction orthogonal with broken line 51).Therefore, the inner opening portion 71 extended along short side direction easily closes due to the strong or weak relation of mentioned strain.

In addition, when upstream side bulge 47 expands, just along short side direction, the tension force being better than long side direction is not applied to partition member 50, to two coincidence parts 61 comprising two valve body 73,74, also apply along short side direction the tension force being better than long side direction.Utilize this tension force, the state that two valve body 73,74 are close to each other with its whole surface, become the sealing state of the leakage of repression of swelling gas G.Therefore, the expansion gas G in upstream side bulge 47 not easily passs through between inner opening portion 71 and two valve body 73,74 and flows out to downstream bulge 48.

And in the 2nd embodiment, two valve body 73,74 are arranged in downstream bulge 48 from before bulge 46 expands.Therefore, different from the 1st embodiment, the interior pressure of upstream side bulge 47 is applied to two valve body 73,74 from the both sides in its overlapping direction (thickness direction), and two valve body 73,74 can not become self-enclosed state.In addition, due to this interior pressure, the coincidence part 61 comprising two valve body 73,74 also can not be pressed by the non-coincidence portion 62 of partition member 50.

Under the state of pressure regulating valve 70 valve closing, continue upstream supply expansion gas G in side bulge 47, on the other hand, as seen in this fig. 17b, if the external force applied with passenger restraint and make bulge 46 be pressed distortion, then partition member 50 tension variation of bearing.In addition, with the above-mentioned distortion of bulge 46, the interior pressure PI of upstream side bulge 47 rises further.The centre portion P1 of partition member 50 is pressed, the tension variation that this centre portion P1 bears.

In addition, be out of shape (solid line with reference to Figure 17 B) in the mode bloated to downstream bulge 48 side because the above-mentioned interior pressure PI risen, the top P2 of partition member 50 and bottom P3 are pressed.Namely, top P2 and bottom P3 is deformed into the shape of reversing from the above-mentioned flexion (long and two-short dash line with reference to Figure 17 B) before passenger restraint, at centre portion P1 place, tension force easily changes, thus allows the distortion in inner opening portion 71 and the action of two valve body 73,74 simultaneously.

But when above-mentioned centre portion P1 is out of shape, two coincidence parts 61 fixing at both ends are also pressed, and at the position except two ends, are out of shape in the mode protruded to downstream bulge 48 side.Because this deformation direction is identical with the thickness direction of two valve body 73,74, so with compared with direction separated from one another, direction, face, two valve body 73,74 not easily through-thickness move.Therefore, when less with passenger restraint externally applied forces, two valve body 73,74 maintain the state be close to each other, play high leakproofness.

If increased with passenger restraint externally applied forces, then by the above-mentioned reversion of top P2 and bottom P3, the region that partition member 50 applies tension force expands to the both direction of long side direction (above-below direction).For the upper side member 56 of partition member 50, tension force is upwards comparatively strong, and for lower side member 57, downward tension force is stronger.Due to the change of these two kinds of tension force, the inner opening portion 71 of slit-shaped is stretched along the vertical direction and easily opens.

Width W 1 with the above-below direction in inner opening portion 71 increases, and upside valve body 73 is stretched upward as shown in arrow A U.Close to the part of outer joint portion 54,55 on coincidence part 61, the power maintaining coincidence status is stronger.But this power reduces along with leaving from outer joint portion 54,55, and at the middle body in the direction along interior joint portion 63, namely two valve body 73,74 places are minimum.Therefore, by the coincidence part 61 that vertically stretches valve body 73,74 and near part, along direction separated from one another and above-below direction distortion, the lap of two valve body 73,74 reduces gradually.

Further, as shown in Figure 17 C, at least the valve body 74 of side (such as downside) forwards tilts (toppling over) side in a large number, becomes the state of pressure regulating valve 70 valve opening.Expansion in upstream side bulge 47 gas G, as shown in arrow in Figure 17 C, by forwards flowing between inner opening portion 71 and two valve body 73,74, and flows out to downstream bulge 48.

Therefore, according to the 2nd embodiment, following effect can also be obtained except above-mentioned (1), (3), (4).

(5) a pair coincidence part 61 is set on partition member 50, it extends along short side direction respectively and becomes banded, and in the expansion anteposition of bulge 46 in downstream bulge 48, on two coincidence parts 61, the position corresponding with inner opening portion 71 is set as two valve body 73,74.Two coincidence parts 61 bend along the boundary member in the non-coincidence portion 62 with partition member 50, combine (Figure 16) with the corresponding cloth portion 43,44 of air bag 40 making two coincidence parts 61 along the both ends of short side direction.

Therefore, when upstream side bulge 47 expands, not only partition member 50, also applies along short side direction the tension force being better than long side direction to two coincidence parts 61, two valve body 73,74 can be made to be close to each other with its whole surface, and become sealing state.In addition, when the passenger P caused by bulge 46 retrains, maintain two valve body 73,74 for being close to state until apply larger external force with this constraint, thus can high leakproofness be played.

Therefore, the side air bag device of the 2nd embodiment, from initial stage of passenger restraint in during longer, effective especially when requiring to make pressure regulating valve 70 valve closing and maintain high leakproofness.

(the 3rd embodiment)

Below, for the 3rd embodiment that the present invention is specialized, be described with reference to Figure 18 to Figure 22.

In the 3rd embodiment, as shown in Figure 18 to Figure 20, turned back by the broken line 51 extended along long side direction, end 52,53 is positioned at the partition member 50 of the doubled state of approximated position relatively towards each other, with the state making broken line 51 be positioned at downstream compared with opposed end 52,53, be configured in the bulge 46 of unexpansive deployed condition.

Structure is in addition to the foregoing identical with the 1st embodiment.Therefore, identical label is marked for the position identical with the 1st embodiment and parts, omit detailed description.And, with the position that the great circle frame Y of single dotted broken line surrounds in Figure 18, amplify the position that expression is surrounded with roundlet frame Y.

In this case, partition member 50, before supplying expansion gas G to bulge 46, becomes the doubled state (with reference to Figure 18 to Figure 20) that broken line 51 is positioned at downstream compared with opposed end 52,53.

As shown in Figure 21 and Figure 22, if make upstream side bulge 47 start to expand by supplying expansion gas G to bulge 46, then the partition member 50 of doubled state is stretched, and applies tension force to this partition member 50 along long side direction or short side direction.Due to this stretching, on partition member 50, centre portion P1 becomes the tensioning state of roughly planar, but top P2 and bottom P3 becomes the flexion making broken line 51 be positioned at downstream compared with opposed end 52,53.

For two valve body 73,74 being positioned at upstream side bulge 47, pressure PI in applying from the both sides in its overlapping direction (thickness direction).This interior pressure PI is high when not having bulge 46 couples of passenger P to retrain.Two valve body 73,74 are close to whole face each other because of this interior pressure PI, become the self-enclosed state that confined expansion gas G circulates between two valve body 73,74.In addition, be bent and the coincidence part 61 that overlaps with the non-coincidence portion 62 of partition member 50 is pressed PI because of interior and pressed (with reference to Figure 22 A) by this non-coincidence portion 62, two valve body 73,74 are more prone to close.

Here, the 3rd embodiment also identically with the 1st embodiment, meet L1>L2 relation strip partition member 50 on, inner opening portion 71 extends (with reference to Figure 21) along short side direction.On the other hand, on this partition member 50, easily the tension force being better than long side direction is applied to short side direction.Therefore, due to the strong or weak relation of mentioned strain, inner opening portion 71 easily closes.

In addition, when upstream side bulge 47 expands, the tension force that short side direction is better than long side direction is also applied for the coincidence part 61 comprising two valve body 73,74.Utilize this tension force, two valve body 73,74 are close to each other with its whole face, thus become the sealing state of repression of swelling gas G leakage.Therefore, the expansion gas G in upstream side bulge 47 not easily passs through between inner opening portion 71 and two valve body 73,74 and flows out to downstream bulge 48.

Under the state of pressure regulating valve 70 valve closing, continue upstream supply expansion gas G in side bulge 47, on the other hand, if the external force applied with passenger restraint and make bulge 46 be pressed distortion, then partition member 50 tension variation of bearing.In addition, with the distortion of bulge 46, the interior pressure PI of upstream side bulge 47 rises further.The centre portion P1 of partition member 50 is pressed, the tension variation that this centre portion P1 bears.

On the other hand, top P2 and the bottom P3 of partition member 50 are pressed, and are out of shape in the mode bloated to downstream bulge 48 side.Top P2 and bottom P3 before as mentioned above to passenger restraint, becomes the flexion making broken line 51 be positioned at downstream compared with opposed end 52,53.When passenger restraint, top P2 and bottom P3 become with passenger restraint before the shape of same tendency.Therefore, compared with above-mentioned 1st embodiment, the change of the tension force of the centre portion P1 caused by the alteration of form of partition member 50 is less.Therefore, be difficult to allow the distortion in inner opening portion 71 or the action of two valve body 73,74.

Now, different from the 1st embodiment, because top P2 and bottom P3 does not reverse, so the region of partition member 50 bearing tension force expands along long side direction (above-below direction), not easily cause towards the tension force grow of the both direction along this long side direction (above-below direction).Therefore, easily make inner opening portion 71 and valve body 73,74 be maintained the state of closedown, easily maintain leak tightness.

Then, identical with the 1st embodiment.That is, the upper side member 56 with partition member 50 is out of shape to downstream bulge 48 side, and tension force upward increases.With lower side member 57 to the distortion of downstream bulge 48 side, tension force downward increases.Due to the change of these two kinds of tension force, the inner opening portion 71 of slit-shaped is stretched along the vertical direction and opens (with reference to Figure 22 B).

If inner opening portion 71 opens to a certain degree along the vertical direction, then on coincidence part 61, only at higher interior two valve body 73,74 place pressing PI being subject to upstream side bulge 47, reversed (with reference to Figure 22 B) by extruding to downstream bulge 48 through inner opening portion 71.

Further, if the width W 1 in inner opening portion 71 is greater than 2W2, then leading section 73T, 74T is separated (with reference to Figure 22 C).If pressure regulating valve 70 becomes the state of valve opening, then the expansion gas G in upstream side bulge 47 successively by between inner opening portion 71 and two valve body 73,74, can flow out to downstream bulge 48.

Therefore, according to the 3rd embodiment, except above-mentioned (1), (2), (4), following effect can also be obtained.

(6) by being turned back by the broken line 51 that partition member 50 extends along long side direction, partition member 50 becomes end 52,53 relatively towards each other and is positioned at the doubled state of position closer to each other.The partition member 50 of this doubled state is positioned at the state in downstream compared with opposed end 52,53 with broken line, be configured on the bulge 46 of unexpansive deployed condition.In addition, separating part 50 is combined with the corresponding cloth portion 43,44 of air bag 40 by outer joint portion 54,55 at each opposed end 52,53, simultaneously at the both ends of long side direction (roughly vertical direction), be combined (Figure 18, Figure 21) by periphery joint portion 45 and this two cloth portions 43,44.

Therefore, when bulge 46 expands, the top P2 of partition member 50 and bottom P3 becomes the flexion (Figure 22 A) that broken line 51 is positioned at downstream compared with opposed end 52,53.In addition, when the external force with passenger restraint is applied on bulge 46, due to upstream side bulge 47 rise in pressure, top P2 and bottom P3 becomes the shape that broken line 52 is positioned at downstream compared with opposed end 52,53, namely with passenger restraint before the shape of same tendency.Compared with the 1st and the 2nd embodiment, the tension variation of the centre portion P1 caused by the alteration of form of top P2 and bottom P3 can be reduced, allow the distortion in inner opening portion 71 or the action of two valve body 73,74 and not easily carry out.Inner opening portion 71 and two valve body 73,74 are maintained the state of closedown, easily maintain leak tightness.Therefore, after pressure is high pressure in maintenance upstream side bulge 47, the characteristic that the expansion gas G of upstream side bulge 47 is flowed out to downstream bulge 48 is easily obtained.

(the 4th embodiment)

Below, for the 4th embodiment that the present invention is specialized, be described with reference to Figure 23 to Figure 26 C.

In the 4th embodiment, as shown in Figure 23 and Figure 24, the coincidence part 61 comprising two valve body 73,74 is configured in downstream bulge 48 before bulge 46 expands, and this point is different from the 3rd embodiment.Therefore, identical label is marked, detailed for the position identical with the 3rd embodiment and parts.In addition, with the position that the great circle frame Z of single dotted broken line surrounds in Figure 23, the position that expression is surrounded with roundlet frame Z is amplified.

In this case, partition member 50, before supplying expansion gas G to bulge 46, becomes the doubled state (with reference to Figure 23, Figure 24 A to Figure 24 C) that broken line 51 is positioned at downstream compared with opposed end 52,53.

If make upstream side bulge 47 start to expand by supplying expansion gas G to bulge 46, then the partition member 50 of doubled state is stretched, and applies tension force to this partition member 50 along long side direction or short side direction.Due to this stretching, on partition member 50, centre portion P1 becomes the tensioning state (with reference to Figure 25) of roughly planar, but top P2 and bottom P3 becomes the flexion (with reference to Figure 26 A) making broken line 51 be positioned at downstream compared with opposed end 52,53.

Here, in the 4th embodiment, two valve body 73,74 expand anteposition in downstream bulge 48 at bulge 46.Therefore, different from the 3rd embodiment, the interior pressure of upstream side bulge 47 is relative to two valve body 73,74, and apply thereon from the both sides of overlapping direction (thickness direction), two valve body 73,74 do not become self-enclosed state.In addition, due to this interior pressure, the coincidence part 61 comprising two valve body 73,74 also can not be pressed by the non-coincidence portion 62 of partition member 50.

But, meet L1>L2 relation strip partition member 50 on because inner opening portion 71 extends along short side direction, so easily apply to short side direction the tension force being better than long side direction, inner opening portion 71 easily closes.

On this basis, for the coincidence part 61 comprising two valve body 73,74, also apply the tension force that short side direction is better than long side direction.Due to this tension force, two valve body 73,74 are close to each other with its whole face, become the sealing state that repression of swelling gas G leaks.Therefore, the expansion gas G in upstream side bulge 47 not easily passs through between inner opening portion 71 and two valve body 73,74 and flows out to downstream bulge 48.

On the other hand, if apply the external force of adjoint passenger restraint and make bulge 46 be pressed distortion, then to the tension variation that partition member 50 applies.In addition, with the above-mentioned distortion of bulge 46, the interior pressure PI of upstream side bulge 47 rises further.The centre portion P1 of partition member 50 is pressed, the tension variation that this centre portion P1 bears.

In addition, top P2 and the bottom P3 of partition member 50 are pressed, and are out of shape (with reference to Figure 26 B) in the mode bloated to downstream bulge 48 side.Top P2 and bottom P3 before as mentioned above to passenger restraint, becomes the flexion (with reference to Figure 26 A) making broken line 51 be positioned at downstream compared with opposed end 52,53.When passenger restraint, top P2 and bottom P3 become with passenger restraint before the shape of same tendency.Therefore, compared with the 2nd embodiment, the change of the tension force of the centre portion P1 caused by the alteration of form of top P2 and bottom P3 is less, is difficult to allow the distortion in inner opening portion 71 or the action of two valve body 73,74.

Now, because top P2 and bottom P3 does not reverse, so the region of partition member 50 bearing tension force expands along long side direction (above-below direction), not easily cause and increase towards the tension force of the both direction along this long side direction (above-below direction).Therefore, easily make inner opening portion 71 and valve body 73,74 be maintained the state of closedown, easily maintain leak tightness.

In addition, with the distortion of above-mentioned centre portion P1, two coincidence parts 61 fixing at both ends are also pressed, and with in the position except both ends, the mode expanded to downstream bulge 48 is out of shape.Because this deformation direction is identical with the thickness direction of two valve body 73,74, so two valve body 73,74 are compared with direction separated from one another on direction, face, not easily through-thickness moves.Therefore, time less with passenger restraint externally applied forces, two valve body 73,74 maintain the state be close to each other, play high leakproofness.

Then, identical with the 2nd embodiment.That is, if increased with passenger restraint externally applied forces, then relative to the upper side member 56 of partition member 50, tension force upward increases, and for lower side member 57, tension force downward increases.Therefore, the inner opening portion 71 of slit-shaped is stretched along the vertical direction and opens (with reference to Figure 26 B).

Width W 1 with the above-below direction in inner opening portion 71 increases, and the valve body 73 of upside is stretched upward, and the valve body 74 of downside is stretched downwards.Coincidence part 61 valve body 73,74 and near part be out of shape along the vertical direction, the lap of two valve body 73,74 reduces gradually.

Further, if be applied on bulge 46 with the larger external force of passenger restraint, this bulge 46 is out of shape in a large number, then, as shown in Figure 26 C, at least the valve body 74 of side forwards tilts (toppling over) side in a large number, and pressure regulating valve 70 becomes the state of valve opening.Expansion in upstream side bulge 47 gas G, as shown in arrow in Figure 26, forwards flows through inner opening portion 71 and two valve body 73,74, flows out eventually to downstream bulge 48.

Therefore, according to the 4th embodiment, the effect identical with above-mentioned (1), (4) to (6) can be obtained.Especially, in the 4th embodiment, because compared with the 3rd embodiment, the not easily action of two valve body 73,74, so easily obtain by after pressing in upstream side bulge 47 be maintained high pressure compared with the 3rd embodiment, make the characteristic that the expansion gas G of upstream side bulge 47 flows out to downstream bulge 48.

In addition, when air bag 40 cloth portion 43,44 with compared with the suture used in periphery joint portion 45, the former excellent heat resistance.On the other hand, the expansion gas G of high temperature is sprayed from charging blower 31.Therefore, as air bag 40, compared with sewing up near 31 near charging blower with by one piece or two clothes, do not sew up and use the method for piece of cloth portion doubling near 31 near charging blower, good in resistance to effect of heat.

But, in this case, use the structure of the 1st and the 3rd embodiment in the 1st to the 4th embodiment, from more difficult the angle manufactured.This is because air bag 40 is made up of piece of cloth portion, the sequence of events arranging each joint portion must adopt the order of 63 → periphery joint portion, 54,55 → interior joint portion, outer joint portion 54.Except carrying out except operation with this order, in the mode making coincidence part 61 be positioned at upstream side bulge 47, the operation carrying out arranging outer joint portion 54,55 and interior joint portion 63 is very difficult.Its result, must adopt coincidence part 61 to be positioned at the structure of the 2nd and the 4th embodiment of downstream bulge 48.Therefore, can say, the 2nd and the 4th embodiment and coincidence part 61 are positioned at compared with the 1st and the 3rd embodiment of upstream side bulge 47, manufacture simple and have advantage.

(the 5th embodiment)

Below, for the 5th embodiment that the present invention is specialized, be described with reference to Fig. 6, Figure 27 and Figure 28.

Air bag 40, as front general introduction, is combined by the periphery joint portion 45 utilizing the circumference along this cloth portion 43,44 to arrange in a pair cloth portion 43,44 and is formed as bag-shaped.In addition, as front general introduction, partition member 50 is turned back by the broken line 51 extended at the forward position long side direction of expansion gas G supply, becomes end relatively towards each other 52, the 53 closer to each other and doubled state of locating.In addition, partition member 50 is combined with cloth portion 43,44 by outer joint portion 54,55 at each opposed end 52,53 place, is passing through situation that periphery joint portion 45 is combined with two cloth portions 43,44 also as front general introduction along the both ends of long side direction.And, in aftermentioned explanation, only the parts that air bag 40 is in a ratio of inside car with the middle body of vehicle-width direction are described, also identical for the parts outside car.

Here, in the outer joint portion 54 that the opposed end 52 of above-mentioned partition member 50 is combined with the cloth portion 43 of air bag 40, when extending abreast with broken line 51 (with reference to Fig. 6 etc.), the interval D 1 of outer joint portion 54 and broken line 51, comprise the cross part 51C of broken line 51 and periphery joint portion 45, all identical in any position of long side direction.

On the other hand, partition member 50, with the expansion of bulge 46, is tensioned and becomes and its expansion direction (front (be roughly in figure 6 right side)) orthogonal plane.The opposed end 52 of partition member 50 is combined with the cloth portion 43 of air bag 40 by outer joint portion 54, and on the other hand, the part of turning back of partition member 50 is only combined with above-mentioned cloth portion 43 by periphery joint portion 45 at the both ends of long side direction.Therefore, when partition member 50 is as mentioned above with plane tensioning, the part that the broken line 51 along partition member 50 is turned back, is stretched to the side, outer joint portion 54 along bulge 46 expansion direction and moves.To turn back part and the joint portion in cloth portion 43, i.e. the cross part 51C of broken line 51 and periphery joint portion 46, identically, as shown in arrow A in Fig. 61, side, outside joint portion 54 is stretched and moves the position outside also dividing with return portion.Position except return portion is divided directly is not combined with cloth portion 43, non-moving-limiting.But at the joint portion of part with cloth portion 43 (the cross part 51C of broken line 51 and periphery joint portion 45) place of turning back, periphery joint portion 45 limits the movement of this cross part 51C.Therefore, the position except cross part 51C divides from except return portion is different, forces be stretched and apply very large load on this cross part 51C.

Now, outer joint portion 54 is parallel with broken line 51, and as shown in Figure 6, broken line 51 is very large with the interval D 1 of outer joint portion 54.Thus, the amount of movement (amount be stretched) rearward leaving above-mentioned cross part 51 far away from outer joint portion 54 is comparatively large, adjoint with it, and the pulling force acting on this cross part 51C increases.Its result, concentrates at above-mentioned cross part 51C upper stress, may apply very large load.For this point, reinforcement can be carried out by increase reinforcement cloth etc. to cross part 51C and solve, but strengthen the setting separately of cloth needs, need the operation be combined with air bag 40 by reinforcement cloth, thus cause cost increase.

Therefore, in the 5th embodiment, can tackle by trying every possible means to the shape of the outer joint portion 54 making opposed end 52 and cloth portion 43 combine.

Outer joint portion 54 is set to, and makes this outer joint portion 54 and the interval D 1 of broken line 51, at the cross part 54C place of the periphery joint portion 45 with this outer joint portion 54, is less than the centre portion along long side direction.

More particularly, as shown in figure 27, in the imaginary airbag apparatus that joint portion 54 and broken line 51 extend abreast outside, some A defines in the following manner to some D.

Point A: the position that outer joint portion 54 intersects with periphery joint portion 45.

Point B: the position that broken line 51 and periphery joint portion 45 intersect.

Point C: by a B, and the position that the line segment S1 orthogonal with broken line 51 and outer joint portion 54 intersect.

Point D: outside on joint portion 54, and from above-mentioned some C to the position leaving the length identical with above-mentioned line segment S1 close to pressure regulating valve 70 side.

Because periphery joint portion 45 is arranged on two positions up and down in cloth portion 43, so above-mentioned some A exists two groups up and down to putting D.In addition, often group point A to some D with joint portion 63 in pressure regulating valve 70 for axis of symmetry, be positioned at roughly each other in the position of line symmetric relation.Therefore, here, in any one group, the expression of some A to some D is all jointly used.

In each group, the part (54S: with reference to Figure 28) connected in periphery joint portion 45 and some D in outer joint portion 54 is arranged at the position meeting following condition.

Condition: in the region Z1 (marking the region of site in Figure 27) surrounded by the line segment S2 connected by an A and some D, the line segment S3 connected by a B and some D and periphery joint portion 45, compared with line segment S2, be arranged on line segment S3 side.

In order to meet above-mentioned condition, in the 5th embodiment, as shown in figure 28, the part 54S in outer joint portion 54 becomes the linearity along line segment S3.Therefore, the part 54S in outer joint portion 54 and broken line 51 intersect obliquely.

In addition, in the 5th embodiment, outside in joint portion 54 by the part 54M that the some D of the some D of one group, upside and one group, downside connects, become linearity in the mode parallel with broken line 51.

In addition, with the above-mentioned change of the shape of outer joint portion 54, the shape of the periphery 50C of partition member 50 also changes.The periphery 50C of partition member 50 is positioned at the position leaving certain distance from outer joint portion 54.In the position that periphery 50C is corresponding with the part 54S of outer joint portion 54, intersect obliquely with broken line 51, the position corresponding with part 54M is parallel with broken line 51.

Structure is in addition to the foregoing identical with the 1st embodiment.Therefore, identical label is marked, detailed for the position identical with the 1st embodiment and parts.

In the 5th embodiment, by the shape of outer joint portion 54 is changed to the shape different from the 1st to the 4th embodiment, make outer joint portion 54 and the interval D 1 of broken line 51, at this outer joint portion 54 and the cross part 54C place of periphery joint portion 45, be less than the centre portion along long side direction.Compared with the situation (with reference to Fig. 6) parallel with broken line 51 with outer joint portion 54, the interval D 1 of cross part 51C and cross part 54C reduces.

Therefore, in the expansion of separating part 50 with bulge 46, tensioning become orthogonal with its expansion direction plane time, side, cross part 51C outside joint portion 54 is stretched and the amount of movement, reduces as indicated by arrow a 1.Adjoint with it, the pulling force acting on cross part 51C reduces, and concentrates alleviated relative to the stress of cross part 51C.Reduce the possibility applying very large load at above-mentioned cross part 51C place.

Especially, in the 5th embodiment, the part 54S in outer joint portion 54 becomes the linearity along line segment S3, and the interval D 1 of cross part 54C and broken line 51 is close to the minimum value in possible range.Therefore, side, cross part 51C outside joint portion 54 is stretched and the amount of movement, furtherly, be act on this cross part 54C pulling force close to minimum value, thus obtain the concentrated good result of the stress of alleviating this cross part 51C place.Not easily apply very large load at above-mentioned cross part 51C, thus do not need the additive method strengthening this cross part 51C.

Therefore, according to the 5th embodiment, except above-mentioned (1) is to (4), following effect can also be obtained.

(7) in outer joint portion 54 by periphery joint portion 45 and some D connect part 54S, in the region Z1 surrounded by the line segment S2 connected by an A and some D, the line segment S3 connected by a B and some D and periphery joint portion 45, be arranged at line segment S3 side compared with line segment S2.By adopting this structure, the interval D 1 of outer joint portion 54 and broken line 51, joint portion 54 and the cross part 54C place of periphery joint portion 45, be set to be less than the long side direction along partition member 50 centre portion (part 54M etc.) (Figure 28) outside.

Therefore, compared with the situation (Fig. 6 etc.) that the entirety of outer joint portion 54 is parallel with broken line 51, broken line 51 can be reduced be stretched and the amount of movement with the outside joint portion 54 of cross part 51C of periphery joint portion 45, be the pulling force acting on this cross part 51C furtherly, thus alleviate at the stress of this cross part 51C concentrated.

(8) by making the part 54S will be connected with some D with the cross part 54C of periphery joint portion 45 in outer joint portion 54, be formed as the linearity along the line segment S3 connected by a B and some D, thus outer joint portion 54 and the cross part 54C of periphery joint portion 45 and the interval D 1 of broken line 51 can be made, close to the minimum value (Figure 28) of possible range.

Therefore, broken line 51 is stretched and the amount of movement with the outside joint portion 54 of cross part 51C of periphery joint portion 45, be furtherly act on this cross part 51C pulling force close to minimum value, the good result that the stress of this cross part 51C that can be eased is concentrated.

Its result, can reduce to use and strengthen the independent method that cross part 51C strengthened by cloth etc., or according to circumstances not consider this method.In the latter case, do not need to prepare separately to strengthen cloth, or carry out, by the operation strengthened cloth and be combined with air bag 40, can cost increase being suppressed.

(the 6th embodiment)

Below, for the 6th embodiment that the present invention is specialized, be described with reference to Figure 29 to Figure 37.

As shown in figure 34, when becoming flat state, along the length L1 in the direction of broken line 51, being longer than the partition member 50 with the length L2 of broken line 51 orthogonal directions, in the 6th embodiment, being made up of two parts 81,82 arranged along vehicle-width direction.As shown in Figure 29 to Figure 33, on two parts 81,82, with the state making ora terminalis 83E, 84E of its end 83,84 be in alignment with each other, it is the band shape that above-below direction is elongated that end 83,84 is overlapped.In two parts 81,82 are extended with linearity along the vertical direction by the boundary member between the coincidence part 61 and other parts (non-coincidence portion) of band shape, joint portion 63 is bonded to each other.Certain distance is left from ora terminalis 83E, 84E of above-mentioned two parts 81,82 in interior joint portion 63, doubles as broken line 51.Therefore, interior joint portion 63 is arranged on broken line 51.

Above-mentioned partition member 50 arranges pressure regulating valve 70.More particularly, above-mentioned interior joint portion 63 is removed in its part (being the middle body of above-below direction in the 6th embodiment) and is combined.At the middle body of above-below direction, the interior joint portion 63 that two parts 81,82 are combined is not set.Remove the inner opening portion 71 that the position combined forms the slit-shaped that upstream side bulge 47 is communicated with downstream bulge 48.

The part corresponding with inner opening portion 71 on coincidence part 61 (near part, more precisely inner opening portion 71 and the part between ora terminalis 83E, 84E) forms a pair valve body 78,79.There is at a part of place the coincidence part 61 of a pair valve body 78,79, before bulge 46 expands, be configured at upstream side bulge 47.In addition, inner opening portion 71 and two valve body 78,79 are positioned at the centre portion P1 of partition member 50.

Further, banded coincidence part 61 is in the both ends in the direction along interior joint portion 63, i.e. upper end and bottom, by above-mentioned periphery joint portion 45, identically with the partition member 50 of doubled state, with two cloth portions 43 of air bag 40,44 overlapping and combine, namely make together.And different from the 1st embodiment and the 2nd embodiment, coincidence part 61 is not to non-coincidence portion lateral buckling.

Other structures are identical with the 1st embodiment.Therefore, identical label is marked, detailed to the position, parts etc. identical with the 1st embodiment.

In the side air bag device of the 6th embodiment, if hit because of side, vehicle is impacted, supply expansion gas from charging blower 31, then upstream side bulge 47 starts to expand.

In bulge 46, the partition member 50 of doubled state configures with the state making broken line 51 (interior joint portion 63) be positioned at upstream side compared with opposed end 52,53.And this partition member 50, at two opposed ends 52,53 place, combines with the corresponding cloth portion 43,44 of air bag 40 respectively by outer joint portion 54,55.In addition, partition member 50, on the both ends (upper end and bottom) in the direction along broken line 51 (interior joint portion 63), is combined with two cloth portions 43,44 (with reference to Figure 30, Figure 31) respectively by periphery joint portion 45.Therefore, if upstream side bulge 47 starts to expand in the manner described above, then the partition member 50 of doubled state is stretched.To partition member 50, along direction or the direction orthogonal with it applying tension force (with reference to Figure 34) of broken line 51 (interior joint portion 63).

By this tension force, become the tensioning state (with reference to Figure 33) of roughly planar at partition member 50 place centre portion P1, top P2 and bottom P3 becomes the flexion making broken line 51 (interior joint portion 61) be positioned at upstream side compared with opposed end 52,53.

Here, in the 6th embodiment, on the partition member 50 meeting L1>L2 relation, inner opening portion 71 is arranged along the direction of broken line 51 (interior joint portion 63) (with reference to Figure 34).On the other hand, on this partition member 50, easily the tension force being better than long side direction (direction along broken line 51) is applied to short side direction (direction orthogonal with broken line 51).Therefore, due to the strong or weak relation of above-mentioned tension force, inner opening portion 71 may be made to open.

But, as shown in figure 35, for the coincidence part 61 comprising two valve body 78,79 being positioned at upstream side bulge 47, the interior pressure PI of the upstream side bulge 47 that rises with the supply of expansion gas G, applies from the both sides (vehicle-width direction both sides) in this overlapping direction of coincidence part 61.Two valve body 78,79 become the self-enclosed state be close to each other.Bulge 46, in the position except pressure regulating valve 70, is divided into upstream side bulge 47 and downstream bulge 48 by partition member 50 completely.Therefore, the gas G of the expansion in upstream side bulge 47, is limited, through two valve body 78,79 and inner opening portion 71 and other positions, to flow out to downstream bulge 48.

If make upstream side bulge 47 expand with the supply of expansion gas G, then by the interior pressure PI of the upstream side bulge 47 of increase, as shown in figure 36, coincidence part 61 is only pushed out to downstream bulge 48 side by inner opening portion 71 at valve body 78,79 place.That is, valve body 78,79 is reversed.Now, even if by making partition member 50 with plane tensioning, inner opening portion 71 is stretched and expands to vehicle-width direction, and two valve body 78,79 also maintain closed state in its leading section 78T, 79T contact.That is, by partition member 50 tensioning, inner opening 71 and valve body 78,79 are applied to the power making it open.This power is maximum at place of inner opening portion 71, reducing, reaching minimum in valve body 78,79 along with leaving from this inner opening portion 71.Its result, pressure regulating valve 70 maintains valve closing state, thus the expansion gas G continued in restriction upstream side bulge 47 is flowed out to downstream bulge 48 by inner opening portion 71 and two valve body 78,79.

In addition, as shown in figure 37, if when passenger P retrains, apply the external force caused by the Vehicular side body 11 entered, make bulge 46 outside car, be pressed (shriveling) and be out of shape, then the tension force be applied on partition member 50 reduces.By this reduction, the tension force be applied in inner opening portion 71 reduces.In addition, by making pressure in upstream side bulge 47 rise further with the above-mentioned distortion of bulge 46, the centre portion P1 of partition member 50 is pressed to downstream bulge 48 side, makes the tension variation that this centre portion P1 is subject to.In addition, due to the above-mentioned interior pressure risen, top P2 and the bottom P3 of partition member 50 are pressed, and are out of shape in the mode heaved to downstream bulge 48 side.That is, top P2 and bottom P3 is deformed into the shape from the above-mentioned flexion reversion before passenger restraint, thus easily at centre portion P1, tension variation occurs.Inner opening portion 71 is easily out of shape, the easy action of valve body 78,79.

In this condition, by the above-mentioned rising of pressure in upstream side bulge 47, inner opening portion 71 is opened.In addition, valve body 79 and valve body 78 are to direction (outside car and inside car) displacement separated from one another.If by the displacement of both, leading section 79T, 78T are separated from one another, make pressure regulating valve 70 become the state of valve opening, then the expansion of upstream side bulge 47 with gas G as shown in arrow in Figure 37, by flowing out to downstream bulge 48 between inner opening portion 71 and two valve body 78,79.

About the load that the pressure (interior pressure) of the expansion gas G in each bulge 47,48, the compression area of each bulge 47,48 side of passenger P, passenger P are subject to from air bag 40, how the inlet corresponding to the Vehicular side body 11 entered in car due to impact changes, roughly the same with situation about illustrating in the 1st embodiment (with reference to Figure 12).

Therefore, according to the 6th embodiment, the effect identical with above-mentioned 1st embodiment can be obtained.

In addition, in the 6th embodiment, because on the partition member 50 of relation meeting L1>L2, along broken line 51 (interior joint portion 63), inner opening portion 71 is set, so cannot expect that the 1st embodiment as arranged inner opening portion 71 along the direction roughly orthogonal with broken line 51 (interior joint portion 63) is the same, stronger tension force is born in the direction along inner opening portion 71.

But in the 6th embodiment, comprise the coincidence part 61 of two valve body 78,79, be configured in upstream side bulge 47 before bulge 46 expands, this point is identical with the 1st embodiment.Therefore, can apply from the both sides in the overlapping direction of coincidence part 61 to press PI in upstream side bulge 47.As its result, two valve body 78,79 can be made to be close to each other, realize the self-enclosed state that confined expansion gas G circulates between two valve body 78,79, the expansion gas G in restriction upstream side bulge 47 flows out to downstream bulge 48.

(the 7th embodiment)

Below, for the 7th embodiment that the present invention is specialized, be described with reference to Figure 38 to Figure 40.

In the 7th embodiment, be configured in before bulge 46 expands in downstream bulge 48 by the coincidence part 61 comprising two valve body 78,79, only this point is different from the 6th embodiment.Therefore, identical label is marked, detailed for the position identical with the 6th embodiment and parts.

In this case, the coincidence part 61 comprising two valve body 78,79 carries out multiple action different from the 6th embodiment.

Partition member 50, before supplying expansion gas G to bulge 46, becomes the doubled state (with reference to Figure 38, Figure 39 A, Figure 39 B) making broken line 51 (interior joint portion 63) be positioned at upstream compared with opposed end 52,53.

If make upstream side bulge 47 start to expand by supplying expansion gas G to bulge 46, then on the partition member 50 of doubled state, apply tension force along the direction of broken line 51 (interior joint portion 63) or the direction orthogonal with it.Due to this tension force, on partition member 50, centre portion P1 becomes the tensioning state (with reference to Figure 40) of roughly planar, and top P2 and bottom P3 becomes the flexion making broken line 51 (interior joint portion 63) be positioned at upstream side compared with opposed end 52,53.

Here, on the partition member 50 of relation meeting L1>L2, easily apply relative to short side direction (direction orthogonal with broken line 51) tension force being better than long side direction (direction along broken line 51).Therefore, the inner opening portion 71 that the direction along broken line 51 (interior joint portion 63) extends, may open due to the strong or weak relation of mentioned strain.

But at least leading section 78T, 79T of two valve body 78,79 become and contact with each other and closed state.This is because even if make inner opening portion 71 be stretched by making partition member 50 tensioning become plane, apply the power making it open, this power is also maximum in inner opening portion 71, reduces along with leaving from inner opening portion 71, minimum at leading section 78T, 79T.Its result, the expansion in restriction upstream side bulge 47, is flowed out to downstream bulge 48 by between inner opening portion 71 and two valve body 78,79 with gas G.

In addition, because two valve body 78,79 are positioned at downstream bulge 48, so the expansion of upstream side bulge 47 pressure of gas G applies from the both sides of two valve body 78,79, cannot expect that two valve body 78,79 become self-enclosed state.

In two valve body 78,79 at least under the closed state of leading section 78T, 79T, if continue upstream side bulge 47 interior supply expansion gas G, on the other hand, apply the external force with passenger restraint and make bulge 46 be pressed distortion, then to the tension variation that partition member 50 applies.In addition, with the above-mentioned distortion of bulge 46, the interior pressure of upstream side bulge 47 rises further, the centre portion P1 of partition member 50 is pressed by downstream bulge 48 side, make the tension variation that this centre portion P1 bears, simultaneously the top P2 of partition member 50 and bottom P3 is pressed, and is out of shape in the mode heaved to downstream bulge 48 side.That is, top P2 and bottom P3 is deformed into the shape of reversing from the above-mentioned flexion (with reference to Figure 38) before passenger restraint, easily at centre portion P1, tension variation occurs.Thus allow the distortion in inner opening portion 71 or the action of valve body 78,79.

In this condition, if inner opening portion 71 is opened, and two valve body 78,79 become the state opened, then above-mentioned restriction is removed.By this releasing, expansion gas G flows out from upstream side bulge 47 to downstream bulge 48.

Therefore, according to the 7th embodiment, the effect identical with above-mentioned 1st embodiment can be obtained.But be configured in the 7th embodiment of downstream bulge 48 at coincidence part 61, compared with the 6th embodiment, because not easily apply tension force at coincidence part 61, leak tightness reduces greatly.

In addition, by the above-mentioned 6th and the 7th embodiment that interior joint portion 63 is arranged along the direction of broken line 51, compared with the above-mentioned 1st and the 2nd embodiment arranged along the direction roughly orthogonal with broken line 51 with interior joint portion 63, have superiority in manufacturing cost.This is because in the 1st and the 2nd embodiment, do not work as broken line 51 in interior joint portion 63, on the other hand, in the 6th and the 7th embodiment, work as broken line 51 in interior joint portion 63.

Specifically, in the 1st and the 2nd embodiment, in order to obtain the partition member 50 of doubled state, under the state making ora terminalis 58E, 59E of two parts 56,57 align, end 58,59 is overlapped as banded.Carry out by the boundary member in non-coincidence portion 62 between coincidence part 61 operation (interior joint portion 63 is set) that two parts 56,57 are combined, form partition member 50.Then, need the operation of this partition member 50 along broken line 51 doubling.But, in the 6th and the 7th embodiment, by carry out two parts 81,82 inside car and outside car in conjunction with operation (arranging interior joint portion 63), form the partition member 50 of the state along the doubling of interior joint portion 63 (broken line 51).Do not need the operation of partition member 50 doubling, correspondingly, the number of working processes of side air bag device can be reduced, suppress manufacturing cost.

In addition, when by the cloth portion 43,44 of air bag 40 compared with the suture used at periphery joint portion 45 place, the former resistance to effect of heat is better.On the other hand, high-temperature expansion gas G is sprayed from charging blower 31.Therefore, as air bag 40, compared with sewing up near charging blower 31 with by one piece or two pieces of pieces of cloth, not sew up and by the method for piece of cloth sheet doubling near charging blower 31, better in resistance to effect of heat.

But in this case, the structure of the 1st and the 6th embodiment in application the 1st to the 7th embodiment, from more difficult the angle manufactured.This is because because air bag 40 is made up of piece of cloth sheet, the order arranging the operation of each joint portion is necessary for the order of 63 → periphery joint portion, 54,55 → interior joint portion, outer joint portion 45.Except carrying out except operation according to said sequence, the operation that outer joint portion 54,55 and interior joint portion 63 are set be carried out, to make coincidence part 61 be positioned at upstream side bulge 47, all very difficult.Its result, must adopt coincidence part 61 to be positioned at the structure of the 2nd and the 7th embodiment of downstream bulge 48.Therefore, the 2nd and the 7th embodiment and coincidence part 61 are positioned at compared with the 1st and the 6th embodiment of upstream side bulge 47, have advantage because of easy to manufacture.

In addition, the present invention can be embodied as other embodiments as follows.

< and the 6th and common item > of the 7th embodiment

As coincidence part 61 and the combination of air bag 40 of band shape, following two kinds can be considered.

One does not make coincidence part 61 bend to non-coincidence portion, and at the both ends in the direction (roughly vertical direction) along interior joint portion 63, be combined with two cloth portions 43,44 by periphery joint portion 45.This is the combination used in the 6th and the 7th embodiment.

Another kind is that coincidence part 61 is bent to non-coincidence portion, at the both ends of the coincidence part 61 in the direction (roughly vertical direction) along interior joint portion 63, is combined together with non-coincidence portion with two of air bag 40 cloth portions 43,44.This is the combination close with the mode used in the 1st and the 2nd embodiment.If make in this way, be then not only the non-coincidence portion of partition member 50, the tension force along broken line 51 (interior joint portion 63) direction is also applied to coincidence part 61, so two valve body 78,79 are not easily opened, thus improve leak tightness.

< and the common item > of all embodiments

The upper side member 56 of the partition member 50 of each embodiment, also can be partitioned into two pieces along broken line 51.Similarly, lower side member 57 also can be divided into two pieces along broken line 51.

In each embodiment, the opposed end 52 of partition member 50 can combine with the cloth portion 43 of air bag 40 in upstream side bulge 47, also can combine in downstream bulge 48.Similarly, the opposed end 53 of partition member 50 can combine with the cloth portion 44 of air bag 40 in upstream side bulge 47, also can combine in downstream bulge 48.

In addition, one in opposed end 52,53 also can be made to combine in upstream side bulge 47, and make another combine in downstream bulge 48.

In each embodiment, inner opening portion 71 and interior joint portion 63 are not limited to the direction orthogonal with the broken line 51 of partition member 50, also can arrange along with its direction intersected obliquely.

Air bag 40 can be its roughly overall structure be made up of bulge 46, also can be that a part has the structure not being supplied to expansion gas G and non-bloating unexpansive portion.

In the 1st embodiment, as shown in Figure 41 A, Figure 41 B, as partition member 50, the structure be made up of parts 86 (pieces of cloth) also can be used.In this case, by parts 86 along broken line 85 doubling.The position leaving certain distance at the broken line 85 of the partition member 50 from doubled state arranges interior joint portion 63.The part clamped by interior joint portion 63 and broken line 85 is become and forms banded a pair coincidence part 61.In addition, on the broken line 85 of these two coincidence parts 61, at least slit 87 is cut open in the position corresponding with inner opening portion 71.The part become between inner opening portion 71 and slit 87 in two coincidence parts 61 is made valve body 73,74.

Change same as described above can be carried out for the 2nd to the 5th embodiment.

On coincidence part 61, as the part that two valve body 73,74 work, be the part (part inner opening portion 71 near more precisely, be inner opening portion 71 and part ora terminalis 58E, 59E between) corresponding with inner opening portion 71.Therefore, if when upstream side bulge 47 expands in two valve body 73,74 at least leading section 73T, 74T can contact and close, also can change the state of part not corresponding with inner opening portion 71 on coincidence part 61 (near non-part).Such as, for part (near non-part) not corresponding with inner opening portion 71 on coincidence part 61, can combine on a part or whole part ground.As this associated methods, can be sew up, also can be bonding.By changing in the manner described above, part corresponding with inner opening portion 71 on coincidence part 61 only can be made as two valve body 73,74 action, thus suppress the phenomenon of the not corresponding unnecessary action of part, such as, agitate the phenomenon of sound.

In addition, position that also can be not corresponding with inner opening portion 71 on coincidence part 61 cut open grooving at least partially.

Partition member 50 and two valve body 73,74 also can be made up of parts different from each other.

Broken line 51 on the partition member 50 of doubled state, also can tilt a certain amount of along the vertical direction.

In above-mentioned 1st to the 7th embodiment; be illustrated for protection as the side air bag device of the chest PT of the main body of passenger P, but the present invention also can be applied to and comprises this chest PT and protect other positions of passenger P to be subject to side to hit the side air bag device waiting impact.Below, application examples is described.And Figure 43 A to Figure 45 B, schematically represents the configuration status of the parts such as partition member 50 grade on the bulge 46 of air bag 40 respectively, all omits or simplify for thin portion.In addition, the position marking site in each figure is partition member.

" the side air bag device at the position of chest PT to the head PH scope of protection passenger P "

In such side air bag device, as shown in Figure 43 A, carrying to vehicle and under the state expanded, the bulge 46 of air bag 40 becomes and can expand near the side of chest PT to head PH and the elongated shape that extends along the vertical direction.Apply situation of the present invention in this side air bag device under, bulge 46 by having pressure regulating valve (diagram slightly) and the partition member 50 extended along roughly vertical direction, can be separated into former and later two parts.On bulge 46, the rear side of partition member 50 becomes upstream side bulge 88, and front side becomes downstream bulge 89.In this case, partition member 50 vertically extends, but the direction that this partition member 50 extends, also can change corresponding to the requirement performance of air bag 40.Partition member 50 can be the structure tilted with vertical direction.At this moment, partition member 50 and vertical curve angulation (angle of inclination) can have multiple change.

In addition, as shown in Figure 43 B, two positions away from each other on the fore-and-aft direction that partition member can be disposed in parallel in above-mentioned bulge 46.In order to distinguish two partition members, by be positioned at front side be called partition member 50F, be positioned at rear side be called partition member 50R.In this case, bulge 56 is divided into rear, central, first three part by two partition members 50R, 50F.If with the partition member 50R of rear side for benchmark, then " afterwards " portion becomes upstream side bulge 91, and " central authorities " portion becomes downstream bulge 92.In addition, if with the partition member 50F of front side for benchmark, then " central authorities " portion becomes upstream side bulge 93, and " front " portion becomes downstream bulge 94.From charging blower 31 spray expansion with gas G with the sequential flowing of upstream side bulge 91, partition member 50R, downstream bulge 92 (upstream side bulge 93), partition member 50F and downstream bulge 94.In addition, although not shown, but partition member also can be disposed in parallel in bulge 46 fore-and-aft direction on away from each other be more than or equal to 3 positions.

" the side air bag device at the position of waist PP to chest PT (shoulder PS) scope of protection passenger P "

In such airbag apparatus, as shown in Figure 44 A, carrying to vehicle and under the state expanded, the bulge 46 of air bag 40 becomes and can expand near the side of waist PP to chest PT (shoulder PS) and elongated shape along the vertical direction.Bulge 46 is divided into upper and lower two positions by separating part 95 and boiler check valve 96.The frenulum that separating part 95 can be formed by setting up pieces of cloth between two cloth portions 43,44 of air bag 40 is formed, and also namely can form in conjunction with the seam formed by sewing up under the state making two cloth portions 43,44 contact with each other.

Charging blower 31 is configured in the position being in a ratio of upside with separating part 95.Boiler check valve 96 allows to flow to the position of downside in the position of expansion gas on the upside of separating part 95 sprayed from charging blower 31, and limits it and flow to reversing sense.Expanding in the side of such as chest PT and shoulder PS in position on the upside of separating part 95, and expands in the side of such as waist PP in the position on the downside of separating part 95.

Apply situation of the present invention in this side air bag device under, as shown in this Figure 44 A, position, upside can extend along roughly vertical direction, and is divided into front and back two parts further by the partition member 50U with pressure regulating valve (diagram slightly).In addition, the position of downside can extend along roughly vertical direction, and is divided into front and back two parts further by the partition member 50L with pressure regulating valve (diagram slightly).In this case, the position on the upside of separating part 95, makes the part on rear side of partition member 50U become upstream side bulge 97, and makes the part of front side become downstream bulge 98.In addition, the position on the downside of separating part 95, makes the part on rear side of partition member 50L become upstream side bulge 99, and makes the part of front side become downstream bulge 100.

, although not shown, but partition member 50U, 50L only can be arranged on the position on the upside of separating part 95, also only can be arranged on lower position in addition.

As the variation of above-mentioned Figure 44 A, as shown in Figure 44 B, the position on the upside of separating part 95, can replace the partition member 50U extended along roughly vertical direction, is divided into upper and lower two parts by along the partition member 50H that roughly fore-and-aft direction extends.In this case, the part on the downside of partition member 50H becomes the upstream side bulge 101 of protection chest PT, and upper portion becomes the downstream bulge 102 of protection shoulder PS.

In addition, although not shown, but the position on the downside of separating part 95, the partition member 50L extended along roughly vertical direction can be replaced, be divided into upper and lower two parts by along the partition member that roughly fore-and-aft direction extends.In this case, the part on the upside of partition member becomes the upstream side bulge of the first half of protection waist PP, and lower portion becomes the downstream bulge of the lower part of protection waist PP.

As shown in Figure 45 A, bulge 46 can utilize the front at charging blower 31, and along this charging blower 31 along the separating part 103 that roughly vertical direction extends, is roughly divided into former and later two parts.Separating part 103 and above-mentioned separating part 95 (with reference to Figure 44 A, Figure 44 B) are in the same manner, the frenulum that can be formed by setting up pieces of cloth between two cloth portions 43,44 of air bag 40 is formed, and also namely can form in conjunction with the seam formed by sewing up under the state making two cloth portions 43,44 contact with each other.

Position on rear side of separating part 103 becomes the charging blower resettlement section 104 of collecting charging blower 31.Position on front side of separating part 103 becomes the protection portion 105 of shoulder PS to the position within the scope of waist PP of protection passenger P.Protection portion 105 by having pressure regulating valve (not shown), and can be divided into upper, central, lower three parts along a pair partition member 50U, 50L up and down that roughly fore-and-aft direction extends respectively.In this case, if with the partition member 50U of upside for benchmark, then " on " portion becomes upstream side bulge 106, " central authorities " portion becomes downstream bulge 107.In addition, if with the partition member 50L of downside for benchmark, then D score portion becomes upstream side bulge 108, and " central authorities " portion becomes downstream bulge 107.

From charging blower 31 spray expansion with gas G successively via charging blower resettlement section 104, upstream side bulge 106 and partition member 50U, be supplied to downstream bulge 107, meanwhile, downstream bulge 107 is supplied to via charging blower resettlement section 104, upstream side bulge 108 and partition member 50L successively.Thus, expansion gas is supplied to downstream bulge 107 by two paths.

In addition, although not shown, but also can not arrange separating part 103, bulge 46 by having pressure regulating valve (diagram slightly), and is divided into upper and lower two parts along the partition member that roughly fore-and-aft direction extends.Lower portion becomes the expansion gas that starts most to be supplied to from charging blower 31 and protects the upstream side bulge of waist PP, and upper portion becomes and is supplied to expansion gas via upstream side bulge and protects the downstream bulge of chest PT (shoulder PS).

The shape of partition member 50 is not limited to form linearity, also can form non-linear shape.There is the partition member 50 of pressure regulating valve (diagram slightly), such as, shown in Figure 45 B, also can form L-shaped shape.In this case, bulge 46 can be divided into three parts roughly along the vertical direction by partition member 50.The part of the oblique back upper place of partition member 50 becomes upstream side bulge 111, and the part of the oblique back lower place of this partition member 50 becomes upstream side bulge 112, and the part of being surrounded by partition member 50 becomes downstream bulge 113.

Although not shown, but partition member 50 also can form semicircle in addition.

In addition, the thought that relates to of above-mentioned change can suitably for the protection of the side air bag device of chest PT, protection chest to the various air bags of the side air bag device of head PH, the side air bag device of protection waist PP to chest PT (shoulder PS), the side air bag device of protection waist PP to head PH.

The present invention also can be applied to airbag apparatus different types of with side air bag device.

As one of them example, there is the airbag device for protecting knee 120 shown in Figure 46 and Figure 47.As shown in figure 46, airbag device for protecting knee 120 passes through to expand in the front lower place of the lower limb of the passenger P being seated at seat (diagram slightly), protects the position of the calf PD to knee PK from this passenger P.Airbag device for protecting knee 120 is housed in the resettlement section 122 be such as arranged at below Steering gear 121.In addition, this resettlement section 122 also can arrange the front lower place of co-pilot seat passenger on the dash panel.

Apply to impact if to detect by frontal collisions from front to vehicle; then the air bag 123 of airbag device for protecting knee 120 utilizes expansion gas to start to expand; eject rearward from resettlement section 122; between passenger P and Steering gear 121, expand in the region of the calf PD to knee PK of passenger P two leg and launch.

When another example, as shown in figure 47, the air bag 123 of airbag device for protecting knee 120, is combined into band shape by a pair, front and back cloth portion 123A by the periphery joint portion 124 being arranged at its circumference and is formed.The bulge 125 of air bag 123 have the charging blower resettlement section 126 of collecting inflator assemblies 30, protection knee PK upstream side bulge 127, by the downstream bulge 129 in the expansion gas G in charging blower resettlement section 126 upstream a pair gas passage 128 of guiding of side bulge 127 and the downstream that is positioned at upstream side bulge 127.Charging blower resettlement section 126 is formed in the bottom of bulge 125, and upstream side bulge 127 is formed in the top of bulge 125.Downstream bulge 129 is formed between upstream side bulge 127 and charging blower resettlement section 126.Two gas passages 128 are formed in the both sides of the downstream bulge 129 of vehicle-width direction (left and right directions of Figure 47).Charging blower resettlement section 126 and two gas passages 128 and downstream bulge 129 are by being that the separating part 131 that roughly U-shaped is arranged is separated with front in-between.Separating part 131 is in the same manner as above-mentioned separating part 95,103, can form by setting up between former and later two cloth portions 123A of air bag 123 frenulum that pieces of cloth are formed, also can sew up by under the state making former and later two cloth portions 123A contact with each other, the seam be namely combined into is formed.

Between upstream side bulge 127 and downstream bulge 129, partition member 50 is set.Partition member 50 become with bulge 125 expansion and with plane tensioning time, make the length along long side direction (left and right directions of Figure 47), be longer than the strip of the length of the short side direction orthogonal with this long side direction.

Partition member 50 is formed by two parts 56,57 arranged along direction and the vehicle-width direction of broken line 51.In two parts 56,57 are extended by the direction roughly orthogonal with broken line 51, edge, joint portion 63 combines.Crossing the part of broken line 51, the interior joint portion 63 that two parts 56,57 are combined be not set.Not arranging the part of interior joint portion 63 as mentioned above, namely removing the position of combination, forming the inner opening portion 71 of the slit-shaped that upstream side bulge 127 is communicated with downstream bulge 129.

In addition, in Figure 47, partition member 50 becomes doubled state, is configured in the bulge 125 of unexpansive deployed condition with the state making broken line 51 be arranged in upstream side (upside of Figure 47) compared with opposed end 52,53.Two opposed ends 52,53 are combined with corresponding cloth portion 123A by outer joint portion 54,55.Partition member 50, along the both ends (both ends, left and right of Figure 47) in the direction (long side direction) of broken line 51, is combined with two cloth portion 123A by a part (upper end) for above-mentioned separating part 131, namely makes together.

By making airbag device for protecting knee 120 become said structure, then the expansion gas G sprayed from charging blower 31 is supplied to upstream side bulge 127 by two gas supply parts 128.Due to this expansion gas G, upstream side bulge 127 starts to expand.Be out of shape by making upstream side bulge 127 be pressed with passenger restraint externally applied forces, inside press liter, pressure regulating valve 70 valve opening, the expansion gas G in upstream side bulge 127 is supplied to downstream bulge 129.After upstream side bulge 127, downstream bulge 129 expands.Its result; the upstream side bulge 127 that interior pressure can be utilized comparatively early to rise retrains in early days and protects the knee PK that in passenger P lower limb, Dent resistance is higher, utilizes the calf PD being later than in upstream side bulge 127 and pressing the downstream bulge 179 that rises and retrain and protect Dent resistance poor.

As another example of the 5th embodiment, as shown in figure 48, can change to, make the shape of the part 54S be connected with some D periphery joint portion 45 in outer joint portion 54, become compared with the line segment S3 that a B and some D is connected to an arc-shaped for C projection.

Like this, the cross part 54C of outer joint portion 54 and periphery joint portion 45, with the interval D 1 of broken line 51 also close to the minimum value of possible range.

Therefore, broken line 51 is stretched and the amount of movement with the side, cross part 51C outside joint portion 54 of periphery joint portion 45, be furtherly act on cross part 51C pulling force close to minimum value, the good result that this cross part 51C place stress that can be eased is concentrated, obtains the effect identical with above-mentioned (8).

In addition, Figure 48 only represents be in a ratio of the parts inside car with the middle body of vehicle-width direction on air bag 40, but also identical for the parts outside car.

Outside on joint portion 54,55, by the part 54M that one group of some D in some D and downside of one group, upside is connected, as shown in figure 48, also can form following arc-shaped, its with apart from these two some D far and more from broken line 51 away from mode protruding.

Also can with in the region Z1 surrounded by the line segment S2 that an A and some D is connected, the line segment S3 that a B and some D is connected and periphery joint portion 45, being positioned at above-mentioned line segment S3 side compared with above-mentioned line segment S2 is condition, changes the position of the part 54S connected in periphery joint portion 54 and some D in outer joint portion 54.

In another example of the 5th embodiment and above-mentioned Figure 48, the periphery 50C of partition member 50 not necessarily will along outer joint portion 54,55.Therefore, as partition member 50, the structure (periphery 50C becomes a word linearity) identical with the 1st embodiment can be used.

In the respective embodiments described above, inflator assemblies 30 also can be arranged on the outside of air bag 40.In this case, charging blower 31 also can be connected by pipeline with upstream side bulge 47,88,91,93,97,99,101,106,108,111,112,127, via the expansion gas G of this pipeline supply from charging blower 31.

In the respective embodiments described above, also can replace the back of seat 14 of seat 12, resettlement section 18 is set at Vehicular side body 11, air bag module AM is set herein.

(the 8th embodiment)

Below, for the 8th embodiment that the present invention is specialized, by with the difference of the 1st embodiment centered by, with reference to Figure 49 to being described to Figure 53.

In order to the feature of the 8th embodiment is described, the structure for back of seat 14 is described.As shown in Figure 49 and Figure 50, back of seat 14 has seat back main body 22 and is arranged at a pair collateral support part 23 of the both sides along vehicle-width direction of this seat back main body 22.Seat back main body 22 tilted rearward, from Backside support passenger P.Two collateral support parts 23 are forwards given prominence to from seat back main body 22, and restriction is seated at motion Chain cushion 13 leaning on the vehicle-width direction of the passenger P of seat back main body 22.

In above-mentioned air bag 40, inner opening portion 71 is set to as shown in figure 49, under upstream side bulge 47 expands the state launched, the 23F foremost of the collateral support part 23 on seat 12 forwards leaves in the region Z2 between the position of 85mm and the position rearward leaving 15mm from 23F foremost.Here the 23F foremost of so-called collateral support part 23 is from seat back main body 22 forwards outstanding maximum position on back of seat 14.The configuration of the above-mentioned position in inner opening portion 71, by when bulge 46 expands, in the position becoming the side of fore-and-aft direction pars intermedia of the upper part of the body (such as chest PT) of passenger P, each opposed end 52,53 of partition member 50 is combined with corresponding air bag portion 43,44 by two outer joint portions 54,55 and realizes (with reference to Figure 50).

If under the state that upstream side bulge 47 expansion launches, inner opening portion 71 is positioned at the front of above-mentioned scope, then, when there is obstacle in the front of upstream side bulge 47, the expansion of upstream side bulge 47 launches to be hindered by obstacle.In addition, if under the state of upstream side bulge 47 expansion expansion, inner opening portion 71 is positioned at the rear of above-mentioned scope, then upstream side bulge 47 may be difficult to make the sidepiece of back of seat 14 destroy and forwards eject.

Air bag 40 to expand expansion in the mode shown in Figure 11 A to Figure 11 C.In the initial stage launched that expands, by the above-mentioned expansion of upstream side bulge 47, folded state will be removed with the order contrary with this upstream side bulge 47 fold sequence.If upstream side bulge 47 removes (expansion) folded state while expand, then the sidepiece of back of seat 14 is pressed by air bag 40 and destroys, the seat cushion 16 of back of seat 14 is extruded by air bag 40 simultaneously, in fracture reservations (with reference to Fig. 3) place's fracture.

Here, in the present embodiment, the mode being positioned at region Z2 under the state that inner opening portion 71 launches to expand at above-mentioned bulge 47 is arranged.In other words, inner opening portion 71 is arranged to be positioned at the mode rearward leaving the front, position of 15mm from the 23F foremost of collateral support part 23.Thus, inner opening portion 71 not easily occurs and is positioned at contingent phenomenon in the situation of above-mentioned zone Z2 rear, that is, upstream side bulge 47 is difficult to make the sidepiece of back of seat 14 destroy and forwards eject.

Further, air bag 40 as shown in figure 51, a part (inflator assemblies 30 near part) being retained under the state in back of seat 14, ejects from this back of seat 14 through the position destroyed.

Then, be supplied to the upstream side bulge 47 of expansion gas G as shown in figure 50, while Vehicular side body 11 and be seated at the passenger P on seat 12 the upper part of the body (chest PT etc.) latter half of between forwards remove folded state, launch.

Here, in the present embodiment, the mode that inner opening portion 71 is positioned at region Z2 according to upstream side bulge 47 under the state of expansion that expands is arranged.In other words, inner opening portion 71 is arranged to be positioned at the mode forwards leaving the rear of the position of 85mm from the 23F foremost of Vehicular side body 23.Thus, not easily produce contingent phenomenon when inner opening portion 71 is positioned at above-mentioned zone Z2 front, that is, when there is obstacle in upstream side bulge 47 front, the expansion of upstream side bulge 47 launches to be hindered by obstacle.

Finally, air bag 40 completes to expand in the mode shown in Figure 49 and 50 and launches.In addition, the stroke in the expansion expansion process of air bag 40, with press in air bag 40, the relation of compression area and load as shown in figure 12.

According to above the 8th embodiment described in detail, on the basis of the effect obtained by the 1st embodiment, following peculiar effect can also be obtained.

The bulge 46 of air bag 40 is divided into the upstream side bulge 47, adjacent with the front side of upstream side bulge 47 and be supplied to the downstream bulge 48 of expansion gas via upstream side bulge 47 being supplied to expansion gas by laminar partition member 50.Arrange inner opening portion 71 and pressure regulating valve 70 at this partition member 50 place, above-mentioned inner opening portion 71 makes to be communicated with between upstream side bulge 47 and downstream bulge 48, and above-mentioned pressure regulating valve 70 makes inner opening portion 71 opening and closing by a pair valve body 73,74.Following structure is used as two valve body 73,74, it is when upstream side bulge 47 expands and before constraint passenger P, pressed by the expansion gas G in upstream side bulge 47 and contact with each other, thus inner opening portion 71 is closed, when upstream side bulge 47 expands and retrains passenger P, utilize the externally applied forces with above-mentioned constraint, bent by partition member 50 and away from each other, inner opening portion 71 opened.In addition, inner opening portion 71 is set to, under the state launched that expands making upstream side bulge 47, be positioned at the position forwards leaving 85mm from the 23F foremost of collateral support part 23, and in region Z2 between the position rearward leaving 15mm from 23F foremost (Figure 49).

Therefore, separating part 50 can be made to be positioned at the position pressed from side when being retrained by upstream side bulge 47 couples of passenger P, easily the external force retrained with passenger P is passed to partition member 50.Easily make partition member 50 bending and make two valve body 73,74 away from each other (easily by pressure regulating valve 70 valve opening), thus inner opening portion 71 can be made suitably to open, pressure in air bag 40 is adjusted to suitable value.

In addition, different from the situation that inner opening portion 71 under the state launched of expanding at upstream side bulge 47 is positioned at above-mentioned zone Z2 front, even if there is obstacle in the front of upstream side bulge 47, upstream side bulge 47 also can be made without prejudicely to expand and to launch.In addition, different from the situation that inner opening portion 71 under the state launched of expanding at upstream side bulge 47 is positioned at above-mentioned zone Z2 rear, upstream side bulge 47 can make the sidepiece of back of seat 14 destroy, and this upstream side bulge 47 is forwards ejected from back of seat 14.

(the 9th embodiment)

Below, for the 9th embodiment that the present invention is specialized, centered by the aspect different from the 1st embodiment, be described with reference to Fig. 9, Figure 54 and Figure 55.

In the 9th embodiment, as shown in fig. 55, the bulge 46 of swelling state has following outer shape: be provided with the position of partition member 50, and on namely orthogonal with fore-and-aft direction section, size L3 is along the vertical direction 1.1 to 5.0 with the ratio of the size L4 of the Width along seat 12.

In above-mentioned air bag 40, when upstream side bulge 47 expands, partition member 50 expands to front side and becomes ellipsoidal forebody.Thus, as shown in Figure 54, upstream side bulge 47 can be modeled as longitudinal long ellipsoid and consider.In addition, the positional representation marking site in Figure 54, in the bulge 46 of swelling state, arranges the section CS orthogonal with fore-and-aft direction of the position of partition member 50.

This ellipsoidal major diameter (length of major axis) is suitable with the length L3 of the above-below direction of the outer shape of the bulge 46 on above-mentioned section CS, corresponding with the length L1 of above-mentioned partition member 50 long side direction.In addition, along the part that vehicle-width direction extends in ellipsoidal minor axis (length of minor axis), suitable with the length L4 of seat 12 Width in bulge 46 outer shape on above-mentioned section CS, corresponding with the short side direction length L2 of above-mentioned partition member 50.

In addition, the outer shape on above-mentioned section CS can be showed by the ratio of above-mentioned length L3 and length L4 (L3/L4).Ratio (L3/L4) if be greater than 1.0, then becomes longitudinally long outer shape.

Here, when making partition member 50 with bending planar tensioning in the expansion with upstream side bulge 47, the position being provided with inner opening portion 71 to this partition member 50 applies tension force.By in this tension force, apply to be defined as horizontal tension along short-axis direction, apply to be defined as longitudinal tension force along long axis direction.

Correlationship is there is between the difference (Tension Difference) of these two horizontal tensions and longitudinal tension force and ratio (L3/L4).Figure 55 represents, by making length L3 remain constant value (250mm), and when making length L4 change and make ratio (L3/L4) change, mentioned strain difference corresponds to this ratio (L3/L4) and how to change.

Following conclusion can be obtained from above-mentioned Figure 55.

When ratio (L3/L4) is " 1.0 ", when namely outer shape is circular, two horizontal and longitudinal tension force (tension force) are mutually the same, and the difference of two tension force is " 0 ", and inner opening portion 71 easily opens.The difference of mentioned strain is less than or equal in the region of " 1.6 " at ratio (L3/L4), increase along with the increase of this ratio (L3/L4), it is maximum when ratio (L3/L4) is " 1.6 ", be greater than in the region of " 1.6 " at ratio (L3/L4), reduce along with the increase of this ratio (L3/L4).If the difference of this tension force is very large, then the power making inner opening portion 71 close is better than the power making it open far away, thus inner opening portion 71 easily closes.When ratio (L3/L4) is " 1.6 ", the difference of tension force is maximum, and inner opening portion 71 the most easily closes.Think that at ratio (L3/L4) be in the scope of " 1.1 " to " 5.0 ", the difference of tension force is the size that inner opening portion 71 can be made closed.

On the other hand, if because side is hit, Vehicular side body 11 enters inside car, then by this Vehicular side body 11, the bulge 46 of swelling state, by the upper part of the body of passenger P (chest PT etc.) pressing, makes this upper part of the body (chest PT etc.) restrained.

Now, due to the externally applied forces with passenger restraint, bulge 46 is pressed and is out of shape.Accompany therewith, for partition member 50, apply stronger tension force at the Width of seat 12 and reduce, and the tension force that above-below direction applies increases.By the change of these two tension force, the difference of the tension force of both direction reduces, and by partition member 50 two valve body 73,74 are bending, away from each other, inner opening portion 71 is opened.

In addition, make the inner opening portion 71 closed open required adjoint passenger restraint and be applied between the external force of bulge 46 and above-mentioned ratio (L3/L4) to there is correlationship.

Along with ratio (L3/L4) increases (outer shape of bulge 46 on above-mentioned section CS is longer along the vertical direction), in order to make the inner opening portion 71 closed open, need to apply larger external force with passenger restraint to bulge 46.But if apply very large external force at bulge 46, then the load being applied to the upper part of the body (such as chest PT) of passenger P when passenger restraint from air bag 40 also increases.Experimentally, if ratio (L3/L4) is less than or equal to " 5.0 ", even if then apply external force, the load that also passenger P can be made to be subject to is in permissible range.That is, the difference of tension force when ratio (L3/L4) is " 5.0 " with this ratio (L3/L4) for the difference of tension force time above-mentioned " 1.1 " is identical.

If consider above-mentioned situation, then before passenger restraint, inner opening portion 71 is closed, suppress to apply excessive load to passenger P during passenger restraint, and the viewpoint that inner opening portion 71 is opened is considered, ratio (L3/L4) is that the value this point in 1.1 to 5.0 scopes is very important.Preferably this ratio (L3/L4) is 1.2 to 4.5, especially preferably 1.4 to 2.0.With the upper part of the body of passenger P (mainly chest PT) for object of protection, on the side air bag device of the present embodiment that length L3 is shorter, ratio (L3/L4) is set to " 1.6 ".

Below, the effect for present embodiment is described.

Expand in the process of expansion at air bag 40, as shown in Figure 11 C, if the width W 1 in inner opening portion 71 is greater than this aggregate value (=2W2), then leading section 73T, 74T is separated.Pressure regulating valve 70 becomes the state of valve opening, and above-mentioned circulation restriction is removed.By this restriction cancellation, the expansion gas G in upstream side bulge 47 can be made successively by flowing out to bulge 48 between inner opening portion 71 and two valve body 73,74.

Here, as mentioned above, along with ratio (L3/L4) increases (outer shape of the bulge 46 on section CS is longer along the vertical direction), the very large external force of needs is opened for making inner opening portion 71.But, if apply very large external force on bulge 46, be then applied to the load of the upper part of the body (such as chest PT) of passenger P from air bag 40 during passenger restraint also very large.

About this point, if ratio (L3/L4) is less than or equal to " 5.0 ", even if then apply external force, the load that passenger P is subject to is also in permissible range.In the present embodiment, ratio (L3/L4) is set to be less than 5.0 1.6.Therefore, by the above-mentioned suitable setting of correlative value (L3/L4), can suppress to make inner opening portion 71 open the excessive situation of required external force.Its result, when the external force of suitable size being applied on bulge 46 with passenger restraint, the difference of above-mentioned longitudinal and horizontal tension force reduces, and inner opening portion 71 opens.When inner opening portion 71 opens, excessive load can not be applied to passenger.

According to above the 9th embodiment described in detail, according on the basis of the available effect of the 1st embodiment, following distinctive effect can also be obtained.

The bulge 46 of air bag 40, by laminar partition member 50, is divided into the upstream side bulge 47 that is supplied to expansion gas G and adjacent with the front side of upstream side bulge 47 and be supplied to the downstream bulge 48 of expansion gas via upstream side bulge 47.This partition member 50 is provided with inner opening portion 71 and pressure regulating valve 70, above-mentioned inner opening portion 71 forms the slit-shaped that the Width along seat 12 extends, upstream side bulge 47 and downstream bulge 48 are communicated with, and above-mentioned pressure regulating valve 70 has a pair valve body 73,74 making inner opening portion 71 opening and closing.Following structure (Figure 11 A) can be used as two valve body 73,74, that is, when upstream side bulge 47 expands and before constraint passenger P, be contacted with each other by the bulge gas G pressing in upstream side bulge 47, inner opening portion 71 is closed.In addition, following structure (Figure 11 C) can be used as two valve body 73,74, namely, when upstream side bulge 47 expands and before constraint passenger P, contacted with each other by the bulge gas G pressing in upstream side bulge 47, inner opening portion 71 is closed, when upstream side bulge 47 expands and retrains passenger P, by with this constraint externally applied forces, bent by partition member 50 and away from each other, inner opening portion 71 opened.In addition, the bulge 46 of swelling state has following outer shape, namely, be provided with the position of partition member 50, and on the section CS orthogonal with fore-and-aft direction, make the length (L3) of above-below direction and the ratio (L3/L4) of the length (L4) of the Width of seat 12 be 1.1 to 5.0 (with reference to Figure 54).

Therefore, before passenger restraint, can utilize the tension force being better than longitudinal transverse direction that inner opening portion 71 is closed, thus only make to press liter in upstream side bulge 47.In addition, when passenger restraint, excessive load can not applied to passenger P and open inner opening portion 71, making the internal drop of upstream side bulge 47 low, make to press liter in downstream bulge 48 simultaneously.Thus, inner opening portion 71 can be made suitably to close, suitably adjustment upstream side bulge 47 and the respective interior pressure of downstream bulge 48.

In addition, the 8th and the 9th embodiment can be embodied as other embodiments of the following stated.

< is about partition member 50>

The upper side member 56 of partition member 50 can be divided into two parts along broken line 51.Similarly, lower side member 57 also can be divided into two parts along broken line 51.

The opposed end 52 of partition member 50 can be combined with the cloth portion 43 of air bag 40 in upstream side bulge 47, also can combine in downstream bulge 48.Similarly, the opposed end 53 of partition member 50 can be combined with the cloth portion 44 of air bag 40 in upstream side bulge 47, also can combine in downstream bulge 48.

Inner opening portion 71 and interior joint portion 63, be not limited to, along the direction orthogonal with the broken line 51 of partition member 50, to arrange, also can arrange along the direction of broken line 51 along the direction crossing with its inclination.

As partition member 50, the structure be made up of single parts (pieces of cloth) also can be used.

On coincidence part 61, what work as two valve body 73,74 is the part (the neighbouring part in inner opening portion 71 more precisely, be inner opening portion 71 and part ora terminalis 58E, 59E between) corresponding with inner opening portion 71.Therefore, when upstream side bulge 47 expands, if at least leading section 73T, 74T contact and close of two valve body 73,74, then, on coincidence part 61, the form of not corresponding with inner opening portion 71 part (non-neighbouring part) also can be changed.Such as, for part (near non-part) not corresponding with inner opening portion 71 on coincidence part 61, can a part or whole part combine.As the method for this combination, can sew up, also can be bonding.By changing in the manner described above, only making part corresponding with inner opening portion 71 on coincidence part 61 as two valve body 73,74 action, suppressing not corresponding part to carry out the phenomenon of waste motion, the phenomenon such as fluctuated.

The broken line 51 of the partition member 50 of doubled state can tilt a certain amount of with above-below direction.

Remove the position of the combination between two interior joint portions 63, be not necessarily arranged on the part striding across broken line 51, also can be arranged on the position of departing to the direction orthogonal with this broken line 51 from broken line 51.

The position of removing the combination between two interior joint portions 63 can arrange multiple.

Comprise a pair coincidence part 63 of two valve body 73,74, upstream side bulge 47 can be replaced before the expansion of bulge 46, and be arranged on downstream bulge 48.

Turned back by the broken line 51 extended along long side direction and relatively towards each other end 52,53 close to the partition member 50 becoming doubled state, can be configured on the bulge 46 of unexpansive deployed condition with the state making broken line 51 be positioned at downstream compared with opposed end 52,53.In this case, also can will comprise the coincidence part 61 of two valve body 73,74, be configured on downstream bulge 48 before bulge 46 expands.

< is about bulge 46>

Air bag 40 can be that it is roughly overall as shown in above-mentioned embodiment, the structure be made up of bulge 46, also can be to have in a part not to be supplied to expansion gas G and non-bloating unexpansive portion.

Bulge 46 can be divided into more than three positions by partition member.In this case, on bulge 46 across two positions that the flow direction of partition member and expansion gas G is adjacent, the part being positioned at upstream side is upstream side bulge, and the part being positioned at downstream is downstream bulge.Further, the partition member between these two upstream side bulges and downstream bulge arranges pressure regulating valve.

For the bulge 46 of swelling state, being provided with the outer shape of the section CS orthogonal with fore-and-aft direction of the position of partition member 50, can be also 1.1 to 5.0 to change for condition with ratio (L3/L4).

< is about inflator assemblies 30>

Inflator assemblies 30 can be arranged on the outside of air bag 40.In this case, charging blower 31 is connected by pipeline with upstream side bulge 47, via this pipeline, the expansion gas G from charging blower 31 can be supplied to upstream side bulge 47.

< is about the object of protection > of side air bag device

In the above-described embodiment; to protect the side air bag device of the upper part of the body of passenger P (such as chest PT) to be described, but the present invention also can be applied to the position of other positions such as chest PT to head of protection passenger P, waist to the position of chest (shoulder), waist to each position such as position of head is subject to side and the airbag apparatus impacted such as hits.

Other > of <

The present invention can be applied to following side air bag device; it is with towards back of seat 14 direction different from the front of vehicle; such as, on the vehicle of the attitude configuration seat 12 of side; when applying to impact from side (fore-and-aft direction of vehicle) to this seat 12, protection passenger P is subject to above-mentioned impact.

In addition, object of protection increases along the vertical direction along with air bag module AM and length L3 is increased, and adjoint with it, ratio (L3/L4) is greater than preferred value.Such as, at protection waist on the side air bag device at the position of chest (shoulder), ratio (L3/L4) also can be set greater than value " 4.3 " left and right of above-mentioned embodiment.

Apply in the vehicle of side air bag device of the present invention, be not limited to home vehicle, also comprise various industrial vehicle.

The invention is not restricted to vehicle, also can be applied to the side air bag device that other vehicle seats such as aircraft, boats and ships are arranged.

Claims

1. a side air bag device, it utilizes air bag (40) to retrain and protects the passenger (P) rided on vehicle seat (12),

It is characterized in that,

Above-mentioned vehicle seat (12) comprises back of seat (14) and is arranged at the collateral support part (23) of above-mentioned back of seat (14) both sides for a pair, each collateral support part (23) is outstanding to the front of the vehicle, and have (23F) foremost

Said apparatus is contained in a sidepiece of above-mentioned back of seat (14),

Above-mentioned air bag (40) has bulge (46), it utilizes the expansion gas (G) supplied from charging blower (31) corresponding to the impact applied from the side of above-mentioned vehicle seat (12), forwards launch in the side of above-mentioned vehicle seat (12) to expand

Above-mentioned bulge (46) is divided into multiple position by laminar partition member (50), it at least comprises the upstream side bulge (47) that is supplied to above-mentioned expansion gas (G) and adjacent with the front side of above-mentioned upstream side bulge (47) and be supplied to the downstream bulge (48) of expansion gas (G) via above-mentioned upstream side bulge (47)

Above-mentioned partition member (50) arranges pressure regulating valve (70),

Above-mentioned pressure regulating valve (70) has: peristome (71), and it makes to be communicated with between above-mentioned upstream side bulge (47) and above-mentioned downstream bulge (48); And make a pair valve body of above-mentioned peristome (71) optionally opening and closing,

Two valve body (78 of above-mentioned pressure regulating valve (70), 79), when above-mentioned upstream side bulge (47) is expanded and to retrain above-mentioned passenger (P) front, contacted with each other by expansion gas (G) pressing in above-mentioned upstream side bulge (47), above-mentioned peristome (71) is closed, when above-mentioned upstream side bulge (47) is expanded and is retrained above-mentioned passenger (P), utilize the externally applied forces with this constraint, bending and separated from one another by above-mentioned partition member (50), above-mentioned peristome (71) is opened

Above-mentioned peristome (71) is set to, under the state that the expansion of above-mentioned upstream side bulge (47) is expanded, it is arranged in and forwards leaves the position of 85mm from (23F) foremost of the above-mentioned collateral support (23) above-mentioned vehicle seat (12) and rearward leave the region between the position of 15mm from above-mentioned (23F) foremost.

2. side air bag device as claimed in claim 1, is characterized in that,

Above-mentioned partition member (50), overlap as banded by making end under the state of aliging at the ora terminalis of two parts, and the boundary portion office between non-coincidence portion (62) with coincidence part (61) makes these two parts be combined and be formed

Above-mentioned peristome (71) is formed by removing combination to a part for the bound fraction of above-mentioned two parts,

The upper position corresponding with above-mentioned inner opening portion (71) of above-mentioned coincidence part (61) becomes above-mentioned two valve body (78,79).