CN2717769Y

CN2717769Y - Air bag device

Info

Publication number: CN2717769Y
Application number: CNU200420002372XU
Authority: CN
Inventors: 砂走行贞
Original assignee: Nissan Motor Co Ltd
Current assignee: Nissan Motor Co Ltd
Priority date: 2003-02-20
Filing date: 2004-02-20
Publication date: 2005-08-17
Anticipated expiration: 2014-02-20
Also published as: CN1296231C; CN1522898A; JP2004249838A; JP3852412B2

Abstract

The utility model relates to an airbag apparatus for a vehicle, which is provided with an airbag of which the upper end part is fixed on a vehicle body along a longitudinal direction of the vehicle body and is fixed between the upper part of the vehicle body and an interior member in a vehicle compartment, an inflator used for generating gas fed to the airbag, a folding part formed by folding the airbag, and a folding and rotating part formed by folding and rotating one part of the airbag positioned between the upper end part and the folding part so as to provide a first folding and rotating part positioned at the side of the vehicle compartment and a second folding and rotating part positioned between the first folding and rotating part and the folding part. At least one of the first folding and rotating part and the second folding and rotating part is folded between the folding part and the vehicle body.

Description

Airbag apparatus

Technical field

The utility model relates to a kind of airbag apparatus and correlation technique, especially relates to a kind of airbag apparatus and correlation technique thereof that is used for vehicle, and the expansion feature of this airbag apparatus is Be Controlled.

Background technology

In recent years, proposed to be provided for the airbag apparatus of protection passenger's head when the generation side is hit or turned on one's side on the top of vehicle car.

This airbag apparatus is arranged to like this, be that whole airbag fold becomes bobbin shape or bellows (bellows) shape, and be mounted to such state, promptly the upper part of this air bag is fixed on the sidepiece purline of vehicle body upper portion, and part this air bag, that be positioned at cabin side is covered by the inside roof lining as interior vehicle components.Then, when vehicle generation side was hit or turned on one's side, air bag put on the air by the gas from charging blower, and it is launched into the curtain shape downwards, pushed the end portion of inside roof lining open simultaneously in vehicle car, thereby protected passenger's head.

Japanese Patent No.3329277 discloses a kind of airbag apparatus, this airbag apparatus has such structure, wherein, the part (turned-back portion) of turning back of air bag is arranged between the folded part of car body and air bag, like this, when inside roof lining is pushed open by folded part self, turn back part inflation and folded part self is pressed to inside roof lining by at first making, and air bag launches in vehicle car.

Summary of the invention

But, research according to the utility model people, in such airbag apparatus, because the structure that is adopted makes the folded part of air bag self be pressed on the inside roof lining, so that at first expand and push this inside roof lining open by the part of turning back that makes air bag, therefore, the resistance when folded part launches must increase, and this may influence the development rate and the expansion direction of air bag.

Research according to the utility model people has obtained the utility model, and the purpose of this utility model provides a kind of airbag apparatus and correlation technique thereof that is used for vehicle, and this airbag apparatus can improve the development rate of air bag, and can make expansion direction stable.

To achieve these goals, according to an aspect of the present utility model, a kind of airbag apparatus that is used for vehicle is provided, it comprises: air bag, the upper part of this air bag is fixed on the car body along the longitudinal direction of car body, and between the top and interior parts of car body, and this air bag is used for being launched into curtain shape shape downwards; Charging blower, this charging blower are used to produce the gas of supplying with air bag; Folded part, this folded part forms by folding this air bag; And the part of turning back, this part of turning back forms by part air bag, between upper part and folded part is turned back, so that provide in turn back part and in this first part of turning back of second between the partial sum folded part of turning back of first of vehicle car side, first turns back, and partial sum second turns back in the part that at least one folds between this folded part and the car body.

According on the other hand of the present utility model, provide a kind of coiling to be used for the method for the air bag of vehicle, the upper part of this air bag is fixed on the car body along the longitudinal direction of vehicle, and between the top and interior parts of car body, and this air bag is used for being launched into curtain shape shape downwards, and this method comprises: folding this air bag is so that form folded part; And make air bag, the part between air bag upper part and folded part turns back, so that form the part of turning back, thereby provide in first of vehicle car side and turn back partial sum in this first part of turning back of second between the partial sum folded part of turning back, this first at least one of turning back that partial sum second turns back in the part will fold between this folded part and the car body.

By following explanation also in conjunction with the accompanying drawings, can know further feature of the present utility model, advantage and preceence.

Brief description of drawings

Fig. 1 is the utility model embodiment, is used for the lateral plan of the airbag apparatus of vehicle, the figure shows the state when air bag has been launched into curtain shape shape downwards;

Fig. 2 is the utility model embodiment, be used for the cutaway view of the airbag apparatus of vehicle along the line II-II of Fig. 1, the state when this figure has represented mainly that air bag folds and installs;

Fig. 3 is the utility model embodiment, be used for the amplification view of the airbag apparatus of vehicle, the state when this figure has represented the airbag fold among Fig. 2 with the amplification form;

Fig. 4 is the enlarged side view of Fig. 1, is used to represent first the turn back scope of part of partial sum second of turning back of the air bag of airbag apparatus the utility model embodiment, that be used for vehicle; And

Fig. 5 is the utility model embodiment, is used for the cutaway view of the airbag apparatus of vehicle, the figure shows first of the air bag among Fig. 2 partial sum second part of turning back of turning back and inflated, thus the state when folded part released.

The specific embodiment

Introduce according to airbag apparatus AB the utility model embodiment, that be used for vehicle and its correlation technique in detail below with reference to Fig. 1 to Fig. 5.In each figure, the place ahead of vehicle is represented that by arrow FR the rear of vehicle is represented that by arrow RR the top is represented that by arrow UPR the below is represented that by arrow LWR right direction is represented by arrow R, and left direction is represented by arrow L.

Fig. 1 according to present embodiment, be used for the lateral plan of the airbag apparatus of vehicle, the figure shows the state when air bag has been launched into curtain shape downwards, Fig. 2 is the cutaway view of airbag apparatus along the line II-II among Fig. 1, the state when this figure has represented mainly that air bag folds and installs; Fig. 3 is the amplification view of airbag apparatus, and this figure has represented the airbag fold among Fig. 2 with the amplification form and the state when installing; Fig. 4 is the enlarged side view of Fig. 1, is used to represent first the turn back scope of part of partial sum second of turning back of the air bag of airbag apparatus.

As shown in Figure 1, for convenience of explanation, when when vehicle car RM side is seen the top of vehicle V, air bag 1 is launched into curtain shape.In vehicle, front standing pillar 2, centre strut 3 and back prop 4 are as the part of car body, sidepiece purline 5 be formed at this front standing pillar 2, centre strut 3 and back prop 4 above, this sidepiece purline 5 has closed cross sectional structure, and along the longitudinal extension of vehicle.Air bag 1 is arranged to along sidepiece purline 5 from front standing pillar 2 and stretches to back prop 4.

Detailed says, air bag 1 is contained in the housing (not shown), and become such state, promptly the fabricated section 1a of the upper end of this air bag is fixed on the sidepiece purline 5, and air bag folds shown in Fig. 2 and 3 usually, this air bag is covered by inside roof lining 6, and this inside roof lining 6 is internal parts of vehicle car RM.

As shown in Figure 1, two groups three plenum chambers 7 (promptly 6 plenum chambers) altogether are formed at the front and rear of this air bag 1.Import 7a is formed at the upper end of each plenum chamber, and each import 7a is communicated with the gas guiding channel 8 of locating extension along vertical top at air bag 1 of vehicle.Charging blower 9 is connected with the rear portion of this gas guiding channel 8, and this charging blower 9 is gas generators, is used to produce gas G, and this gas G is used to make air bag 1 to expand and launches.From the gas process gas guiding channel 8 of charging blower 9, so that be introduced in each plenum chamber 7 by each import 7a.Band 10 is arranged between the front end and front standing pillar 2 of air bag 1.When air bag 1 launched downwards, this band 10 spurred air bag 1 forward.Therefore, band 10 not only helps downward deployment balloon 1, and air bag is smoothly launched along the longitudinal direction.

How below main reference Fig. 2 and 3 to be introduced folded airbag 1.The air bag of being represented by the long and short dash line among Fig. 21 is expressed as its state before folding, and the air bag of being represented by long and two-short dash line 1 is expressed as its state after expansion.

At first, in air bag 1, folded part 11 forms bobbin shape, and the lower end PE by will being in the air bag 1 under the state of being represented by the long and short dash line among Fig. 2 is wound into so-called " outside around " bobbin shape to right side wall one side of vehicle car (i.e. the anticlockwise direction that arrow W represents in by Fig. 2) and obtains this bobbin shape.The meaning of term " outward around " is sequentially reel by the sidewall from lower end PE towards vehicle car air bag 1 and the method for winding of coiling air bag.

Then, point P2 and the P3 place of the part of the air bag 1 between folded part 11 and fabricated section 1a in Fig. 3 turns back twice, these folded part 11 coiling barrel shape, this fabricated section 1a is fixed on the sidepiece purline 5, in this part of turning back, be defined as first part A (corresponding to the part between a P1 and some P2) of turning back near that of fabricated section 1a, then be defined as the second part B (corresponding to the part between a P2 and some P3) that turns back near another part of turning back of folded part 11.Just, first part A and the second part B that turns back that turns back that mutually overlaps is formed between the inside roof lining 6 in sidepiece purline 5 and the vehicle car, and first part A of turning back is positioned at the inboard of vehicle car, and the second part B that turns back is positioned at the outside of vehicle car, and first turns back between part A and the folded part 11 at this.

In more detail, as shown in Figure 3, first part A and the second part B that turns back that turns back forms like this, promptly second turns back the length b (corresponding in the distance between a P2 and the some P3) of part B than the first longer (a＜b) of the length " a " (corresponding to the distance between a P1 and some P2) of part A that turns back.Therefore, second top of turning back part B is in such state, and promptly it folds between folded part 11 and the sidepiece purline 5.As shown in Figure 4, this first turns back part A corresponding to the top of gas guiding channel 8, and this second turns back part B corresponding to the bottom of gas guiding channel 8, the import 7a and the upper part of plenum chamber 7.

The operation that below introduction is had the airbag apparatus of said structure.

Fig. 5 is the cutaway view of airbag apparatus, the figure shows first of the airbag apparatus among Fig. 2 partial sum second part of turning back of turning back and inflated, thus the state when folded part released.

At first, when detecting vehicle, the sensor (not shown) carried out that side is hit or when turning on one's side, gas sprays from charging blower 9.

At this moment, the gas of ejection at first enters gas guiding channel 8, and arrives the import 7a be communicated with each plenum chamber 7, simultaneously each first part A of turning back is put on the air, thereby inflates to the second part B that turns back.

Wherein, as shown in Figure 5, because first part A and second of turning back turns back that part B expands so that protrude between inside roof lining 6 and sidepiece purline 5, therefore, inside roof lining 6 since first turn back part A and second turn back part B mating reaction and push open towards vehicle car RM inside.

Then, gas arrives the folded part 11 corresponding to each plenum chamber 7, and this gas makes that air bag is whole to expand along arrow E downwards in vehicle, folded part 11 is launched along the clockwise direction among Fig. 3 (shown in arrow e).Because inside roof lining 6 is turned back cooperatively interacting of part B and pushed open in vehicle car RM by first part A and second of turning back, therefore, this folded part 11 will be released towards vehicle car RM, simultaneously folded part 11 will be pressed against on the inside roof lining 6.Therefore, the resistance that produces when folded part 11 launches reduces greatly, thereby the development rate of air bag 1 is improved, and makes expansion direction stable.And, because second top of turning back part B folds between folded part 11 and the sidepiece purline 5, therefore, act on thrust on the folded part 11 owing to second top (it the folds into) inflation of turning back part B produces towards expansion direction E, thereby further improved the development rate of air bag 1.

At last, air bag 1 arrives deployed condition, and at this moment, it has been launched into curtain shape downwards, shown in long and two-short dash line among Fig. 2, and is used to protect passenger's head.

Wherein, because the second part B that turns back comprises the import 7a of plenum chamber 7, therefore, turn back after part B expands second, promptly folded part 11 was released in the broad space of vehicle car MR side by second expansion of turning back part B after, gas flowed into plenum chamber 7 from this import 7a.Therefore, import 7a can fully open, and gas smoothly can be introduced in the plenum chamber 7.

In addition, because folded part 11 is folded into the bobbin shape of outer volume, therefore, folded part 11 uncoiling along clockwise direction also launches, this folded part 11 keeps such state simultaneously, promptly it be positioned at from sidepiece purline 5 downward so that near the sidecar window SW that is positioned at the vehicle car right side.Therefore, when passenger in sidecar window SW and the spacing between this sidecar window SW were narrowed down, air bag 1 also can expand in this narrow-pitch and launch reliably, thereby can protect passenger's head.

Explanation in the above-described embodiments, the folded part 11 with bobbin shape is illustrated as an example, but the utility model is not limited to such folded part in passing.In principle, the utility model also can be used for the folded part of corrugated tube shape.

Structure according to present embodiment, because first partial sum second part of turning back of turning back is arranged in air bag, this first part of turning back has a part that is positioned at the vehicle car inboard, this second part of turning back is communicated with this first part of turning back, therefore, first partial sum second part of turning back of turning back expanded before folded part expands, thereby internal part is pushed open in vehicle car by first and second parts of turning back that expand.

Therefore, do not need folded part to press internal part, the resistance force diminishes when folded part is inflated, thus the development rate of air bag is improved, and make expansion direction stable.

And, because second top of turning back part folds between folded part and the car body, therefore, fold into demi-inflation cause producing act on the folded part, towards the thrust of expansion direction, and further improve the development rate of air bag.

And, because second part of turning back comprises the import of plenum chamber at least, therefore, turn back after the demi-inflation second, promptly after folded part was released in the broad space of vehicle car side by second expansion of turning back part, gas flowed into plenum chamber from this import.Therefore, import can fully be opened, and gas smoothly can be introduced in the plenum chamber.

In addition, because folded part forms the bobbin shape of outer volume, bobbin shape of this outer volume is by obtaining from the air bag lower end towards railroad car lateral wall with this air bag coiling barrel shape, therefore, when folded part during near car body (vehicle window), this folded part uncoiling also launches.Therefore, even when the spacing between passenger and the car body narrows down, air bag also can launch in this narrow-pitch reliably.

The full content of patent application No.TOKUGAN 2003-042584 and the full content of temporary patent application No.60/493357 are incorporated herein by reference, this patent application No.TOKUGAN2003-042584 is on February 20th, 2003 in the applying date of Japan, and this temporary patent application No.60/493357 is on August 8th, 2003 in the applying date of the U.S..

Although introduced the utility model with reference to specific embodiment of the present utility model above, the utility model is not limited to the foregoing description.Instruction can change and change those skilled in the art to the foregoing description according to this paper.Scope of the present utility model is determined by following claim.

Claims

1. airbag apparatus that is used for vehicle comprises:

Air bag, the upper part of this air bag is fixed on the car body along the longitudinal direction of car body, and between the top and interior parts of car body, and this air bag is used for being launched into curtain shape shape downwards;

Charging blower, this charging blower are used to produce the gas of supplying with air bag; And

Folded part, this folded part forms by folding this air bag;

It is characterized in that this airbag apparatus also comprises:

The part of turning back, this part of turning back is turned back by a part that makes the air bag between upper part and folded part and is formed, so that provide in turn back part and in this first part of turning back of second between the partial sum folded part of turning back of first of cabin side, first turns back, and partial sum second turns back in the part that at least one folds between this folded part and the car body.

2. airbag apparatus according to claim 1, as to be used for vehicle is characterized in that: second turn back the part be arranged to than first turn back the part longer, like this, second turn back the part top fold between this folded part and the car body.

3. airbag apparatus according to claim 1, as to be used for vehicle is characterized in that: this air bag has: a plurality of plenum chambers, and these plenum chambers are arranged along the longitudinal direction of vehicle; And the gas guiding channel, this gas guiding channel is communicated with the import in the upper end of plenum chamber respectively, and this gas guiding channel extends along the longitudinal direction; Second turns back partly comprises the import of plenum chamber.

4. airbag apparatus according to claim 1, as to be used for vehicle is characterized in that: folded part has bobbin shape, and this bobbin shape obtains towards compartment sidepiece coiling and folded airbag by the lower end from air bag.

5. airbag apparatus according to claim 1, as to be used for vehicle is characterized in that: expanded before folded part expands by making first partial sum second part of turning back of turning back, thereby make this first partial sum second part of turning back of turning back press off internal part.

6. airbag apparatus according to claim 1, as to be used for vehicle is characterized in that: folded part expands, so that near the sidepiece of vehicle car.