JP2008201172A - Side airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a side airbag device using comparatively high rigidity at a rear part of an occupant as occupant crash protection by a side airbag. <P>SOLUTION: The side airbag device 10 includes a high pressure bag 11 and a low pressure bag 12 having internal pressures different from each other. The high pressure bag 11 is provided at a position on the rear part Dr side of the occupant D in a completely deployed state, and the low pressure bag 12 is provided at a position on a front part Df side of the occupant D in a completely deployed state. The high pressure bag 11 has a larger vertical dimension than the low pressure bag 12. The high pressure bag 11 extends from a side portion of a shoulder blade Du of the occupant D to a side portion of a hip D1. The high pressure bag 11 is provided further on the occupant D side than the low pressure bag 12 or on a door trim side. Otherwise, the low pressure bag 12 may be attached to the door trim. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle side airbag device (hereinafter, simply referred to as a side airbag device), and more particularly to a side airbag device that effectively protects an occupant in consideration of a difference in rigidity in the longitudinal direction of the occupant.

Conventionally, side airbag devices have been proposed which take into account the difference in rigidity of the occupant in the vertical direction and that effectively protect the occupant.
Patent Document 1 discloses a two-chamber seated side airbag device in which the internal pressure of the lumbar chamber is set higher than that of the chest chamber.
Patent Document 2 discloses a two-bag seat-attached side airbag device in which the inner pressure of the waist bag is set higher than that of the chest bag.
JP 2000-177527 A JP 2004-330925 A

  Neither Patent Literature 1 nor Patent Literature 2 considers the difference in rigidity in the front-rear direction of the occupant's chest. Although the rear part is more rigid than the front part than the part that protrudes most to the left and right of the occupant's ribs, the side airbag device is conventionally designed on the basis of the less rigid front part of the chest. And there was an upper limit on the expansion and expansion time. Therefore, the relatively high rigidity at the rear of the occupant is not fully utilized for occupant protection.

  An object of the present invention is to provide a side airbag device that can utilize the relatively high rigidity of the rear part of the occupant for occupant protection by a side airbag, and can also protect the front part of the chest from the impact energy of a side collision as before. Is to provide.

The present invention for solving the above problems or achieving the above object is as follows.
(1) The side airbag device of the present invention has a high pressure bag and a low pressure bag having different internal pressures. The high-pressure bag is provided so as to be positioned on the rear side of the occupant when the deployment is completed, and the low-pressure bag is provided so as to be positioned on the sides of the front and rear of the occupant when the deployment is completed.
(2) In the side airbag device according to (1), the high-pressure bag has a larger vertical dimension than the low-pressure bag.
(3) In the side airbag device according to (1) or (2), the high-pressure bag extends from a side portion of the scapula of the occupant to a side portion of the waist.

(4) In the side airbag device according to any one of (1) to (3), the high-pressure bag and the low-pressure bag are independent from each other.
(5) In the side airbag device according to any one of (1) to (3), the high-pressure bag and the low-pressure bag are two bags that are configured by partitioning a single bag body with a partition wall and sharing the partition wall. is there.

(6) In the side airbag device according to any one of (1) to (5) above, the airbag deployment sewing portion between the side skin of the seat back and the front skin goes around to at least one of the upper end and the lower end of the seat back. It is out.
(7) In the side airbag device according to any one of the above (1) to (6), the deployment order is set so that the high-pressure bag is opened simultaneously with the low-pressure bag or first.

(8) In the side airbag device according to any one of (1) to (7), the high-pressure bag is folded in the vertical direction after being folded in the front-rear direction, and the low-pressure bag is folded in the front-rear direction after being folded in the vertical direction. It is folded.
(9) In the side airbag device according to any one of (1) to (8), the high pressure bag and the low pressure bag are connected to the inflator, and the inflator is a single cylinder type inflator. The inflator was disposed in the diffuser, a plurality of gas ejection holes were formed in the diffuser, and the pressure and amount of the inflation gas into the high-pressure bag and the low-pressure bag were controlled by the size of the gas ejection hole.
(10) In the side airbag device of the above (9), the low pressure bag is folded and put on the diffuser from above, and the high pressure bag is folded and put on the diffuser from below.
(11) In the side airbag device according to (9) or (10), the gas injection hole for the high-pressure bag among the gas injection holes opens toward the outside of the vehicle, and the low-pressure bag among the gas injection holes. The gas injection hole is offset from the direction of the high-pressure bag gas injection hole and opens toward the inside of the vehicle.

(12) The side airbag device according to any one of (1) to (11) further includes an occupant detection sensor for detecting the physique of the occupant, and the occupant is small based on a signal from the occupant detection sensor. A deployment control device is provided that deploys only the low-pressure bag when it is determined that the passenger is an occupant, and that deploys both the low-pressure bag and the high-pressure bag except when the occupant is determined to be a small occupant.
The above (1) to (12) can be applied to the first and second embodiments of the present invention, and the above (1) to (4), (7) and (12) can be applied to the third embodiment of the present invention.

(13) In the side airbag device according to any one of (1) to (12), the high-pressure bag and the low-pressure bag are housed in a window side portion of the seat back, and the high-pressure bag is a space between the door trim and the occupant. The deployment direction is set so that the low-pressure bag is deployed on the door trim side and the low-pressure bag is deployed on the passenger side.
The above (13) can be applied to the first embodiment of the present invention.
(14) In the side airbag device according to any one of (1) to (12), the high-pressure bag and the low-pressure bag are housed in the window side portion of the seat back, and the high-pressure bag is a space between the door trim and the occupant. The deployment direction is set so that the low-pressure bag is deployed on the passenger trim side and the low-pressure bag is deployed on the door trim side.
The above (14) can be applied to the second embodiment of the present invention.
(15) In the side airbag device according to any one of (1) to (4), (7), and (12) above, the high pressure bag is housed in the window side portion of the seat back, and the low pressure bag is in the door trim. Has been placed.
Said (15) is applicable to Example 3 of this invention.

According to the side airbag device of the above (1), when the vehicle side crashes, the occupant is moved away from the side door to the opposite door side by pressing the side surface of the occupant's rear portion with a high-pressure bag, and the occupant's chest front portion with low rigidity The side is restrained by a low-pressure bag, and the impact energy of the chest during a side collision is absorbed by the low-pressure bag. As a result, it is possible to effectively protect the occupant during a side collision, and the occupant protection performance of the side airbag device is improved.
According to the side airbag device of (2) above, since the high pressure bag is longer in the vertical direction than the low pressure bag, the impact when the high pressure bag pushes the occupant can be dispersed in the vertical direction.
According to the side airbag device of (3) above, since the high-pressure bag extends from the side part of the scapula of the occupant to the side part of the lumbar region, the high-pressure bag pushes the occupant with the rigid scapula and waist part. And the impact on the chest with low rigidity can be reduced.

According to the side airbag device of (4) above, the high-pressure bag and the low-pressure bag are independent bags, so that they can be deployed independently, and deployment control is easy.
According to the side airbag device of the above (5), the high-pressure bag and the low-pressure bag are two bags that are configured by partitioning a single bag body with a partition wall and share the partition wall. The structure which relates mutually can be taken easily compared with the case where a high pressure bag and a low pressure bag are mutually independent bags.

According to the side airbag device of (6) above, the high-pressure bag that is long in the vertical direction can be easily deployed outside the seat back by breaking the sewing portion.
According to the side airbag device of the above (7), the high-pressure bag is deployed first at the time of a side collision of the vehicle to keep the occupant away from the side door and to secure a gap between the occupant and the side door. A low-pressure bag having a time allowance can be deployed in the gap between the door and the side door.

According to the side airbag device of (8) above, the high-pressure bag that is long in the vertical direction is first deployed in the vertical direction (particularly downward) that is difficult to deploy, and then deployed forward. The low-pressure bag that is long in the front-rear direction is first deployed forward, which is difficult to deploy, and then deployed in the vertical direction. Therefore, it is possible to easily control the deployment of the high-pressure bag and the low-pressure bag that are wrapped in a side view depending on how the bag is folded.
According to the side airbag device of the above (9), the amount of gas supplied to the high pressure bag and the low pressure bag can be easily controlled by adjusting the size of the gas injection hole formed in the diffuser.
According to the side airbag device of (10) above, the deployment of the high pressure bag and the low pressure bag can be prevented from interfering with each other with a simple configuration.
According to the side airbag device of the above (11), the gas ejection hole for the high-pressure bag among the gas ejection holes opens toward the outside of the vehicle, and the gas ejection hole for the low-pressure bag among the gas ejection holes. Since the direction is offset from the gas ejection hole for the high-pressure bag and opens toward the inside of the vehicle, it is possible to make the occupant less susceptible to the impact of deployment of the high-pressure bag.

  According to the side airbag device of the above (12), an excessive load from the side airbag to the small occupant can be suppressed, and the occupant is appropriately protected from the side collision of the vehicle according to the physique of the occupant. Is possible.

According to the side airbag device of (13) above, the high pressure bag is deployed on the door trim side in the space between the door trim and the occupant, and the low pressure bag is deployed on the occupant side. By intervening in between, the bag tends to follow the side surface of the occupant.
According to the side airbag device of (14) above, the high pressure bag is deployed on the passenger side in the space between the door trim and the occupant, and the low pressure bag is deployed on the door trim side, so the high pressure bag is closer to the occupant side. The effect of keeping the occupant away from the side door is higher than when the low-pressure bag is inside.
According to the side airbag device of (15) above, the bag deployment performance can be improved and the protection area can be expanded by attaching the low-pressure bag to the door. Moreover, since the door-attached bag can be set to a low pressure, the load on the passenger due to the bag can be reduced.

Below, the side airbag apparatus of this invention is demonstrated with reference to FIGS. 1 to 14 show Embodiment 1 of the present invention. 4 to 14 are applicable to the embodiments of the present invention other than the first embodiment of the present invention. 15 to 17 show a second embodiment of the present invention. 18 to 20 show Embodiment 3 of the present invention.
Components that are applicable to all embodiments of the present invention have the same reference numerals throughout all of the embodiments of the present invention.

First, the structure of the side airbag apparatus 10 of Example 1 of this invention is demonstrated with reference to FIGS. 1-14 with an effect | action and an effect.
The side airbag device 10 of the present invention is supplied with the inflation gas from the inflator 21 at the time of vehicle side collision (including the time of side collision pre-detection), and between the occupant D and the side door 14 (door trim 25). It is a device that expands and inflates to protect the occupant D.

As shown in FIGS. 1-3, the side airbag apparatus 10 of this invention has the high pressure bag 11 and the low pressure bag 12 from which internal pressure mutually differs. Here, the high pressure bag 11 is a bag having a higher pressure among a plurality of bags having different internal pressures, and the low pressure bag 12 is a bag having a lower pressure among two or more bags having different internal pressures. is there. The internal pressure of the high-pressure bag 11 is higher than the internal pressure of the side airbag having the conventional single bag, and the internal pressure of the low-pressure bag 12 is equal to or less than the internal pressure of the side airbag having the conventional single bag. .
Both the high-pressure bag 11 and the low-pressure bag 12, or at least one of the high-pressure bag 11 and the low-pressure bag 12 (for example, the high-pressure bag 11) is attached to the seat back 17 (shown in the figure is a seat back frame).

  As shown in FIGS. 1 to 3, in the vehicle front-rear direction, the high-pressure bag 11 is provided so as to be positioned on the side of only the rear portion Dr of the occupant D in the deployed state, and the low-pressure bag 12 is disposed in the deployed state. It is provided so as to be located on both sides of both the front part Df and the rear part Dr. Here, the rear part of the occupant means the rear part of the adult male (AM50) having an average body shape, which is the most rearward part of the rib, and the front part of the occupant is an adult male having an average body type. (AM50) Let's say the front side part from the site | part which protruded most in the left-right direction of the rib. When the occupant is in an inclined posture along the seat back 17, it means the rear side portion and the front side portion in the inclined posture. The front-rear direction of the occupant coincides with the front-rear direction of the vehicle.

  By adopting this configuration, at the time of a vehicle side collision, the occupant D is moved away from the side door 14 to the opposite door side (the anti-collision side) by pressing the highly rigid occupant rear side surface with the high-pressure bag 11, and the occupant chest having low rigidity The front side surface is restrained by the low-pressure bag 12, and the impact energy of the occupant's chest at the time of a side collision is absorbed by the low-pressure bag 12. As a result, the occupant rear portion having high rigidity can be actively used for occupant protection by the side airbag device 10, and the occupant D can be effectively protected at the time of a vehicle side collision. Occupant protection performance is improved.

  FIG. 14 shows a comparison of the operation of the conventional side airbag device and the side airbag device of the present invention. FIG. 14 (a) shows a conventional side airbag device. When the door trim enters, the front part of the occupant is pushed by the rear side airbag and moves to the opposite side, and the clearance s between the side door and the occupant is shown. And the time are as shown by the line (i) in FIG. On the other hand, (b) in FIG. 14 is a side airbag device 10 according to the present invention, which has two side airbags of high pressure and low pressure. Therefore, when the door trim enters, the rear portion of the occupant is the high pressure bag 11. First, the occupant is pushed to the opposite side, so the relationship between the gap s between the side door and the occupant and the time is as indicated by the line (ii) in FIG. That is, the gap s between the side door and the occupant becomes larger in the present invention than in the prior art after the same time has elapsed since the collision. The occupant D can be moved away from the side door 14 toward the opposite door.

  As shown in FIGS. 1 and 2, the vertical dimension (H11) of the high-pressure bag 11 in the vertical direction of the vehicle (which may be vertical or inclined from the vertical direction) is the vertical dimension of the low-pressure bag 12 (H11). It is desirable to be larger than H12). However, as shown in FIG. 3, the high-pressure bag 11 may have substantially the same vertical dimension as the low-pressure bag 12. Alternatively, although not shown, the high-pressure bag 11 may have a smaller vertical dimension than the low-pressure bag 12.

  With this configuration, the high-pressure bag 11 is longer in the vertical direction than the low-pressure bag 12, so that the impact when the high-pressure bag 11 pushes the occupant D at the time of a vehicle side collision can be dispersed in the vertical direction. It is possible to receive a side impact impact at the point, and the load on the occupant can be further reduced as compared to the case where the point is received at one point and a concentrated load is applied to that point.

When the high-pressure bag 11 has a larger vertical dimension than the low-pressure bag 12, it is desirable that the high-pressure bag 11 extends from the side portion of the scapula Du of the occupant D to the side portion of the waist (pelvis) Dl.
When the high-pressure bag 11 has substantially the same vertical dimension as the low-pressure bag 12, as shown in FIG. 3, the high-pressure bag 11 and the low-pressure bag 12 are arranged in the vertical direction from the scapula Du of the occupant D to the chest. It is desirable.

  With this configuration, the high-pressure bag 11 extends from the side part of the shoulder blade Du of the occupant D to the side part of the waist part D1, so that the high-pressure bag 11 has the scapula Du and the waist part Dl having high rigidity to It can be pushed, and the impact on the chest with low rigidity can be reduced, and the entire body of the occupant D can be moved compared to pushing at one point of the scapula Du or the waist Dl.

As shown in FIGS. 1 to 3, the high-pressure bag 11 and the low-pressure bag 12 may be independent bags. Alternatively, as illustrated in FIG. 4, the high-pressure bag 11 and the low-pressure bag 12 may be two bags that are configured by partitioning a single bag body with the partition wall 13 and share the partition wall 13.
The material of the bag may be the same as the material of the conventional bag, for example, made of cloth.

  When the high-pressure bag 11 and the low-pressure bag 12 are independent bags, the high-pressure bag 11 and the low-pressure bag 12 can be deployed independently of each other, and deployment control is easy. For example, when the high-pressure bag 11 is to be opened first, the inflation gas from the inflator 21 is supplied to the high-pressure bag 11 first, and the inflation gas from the inflator 21 is supplied to the low-pressure bag 12 slightly later than that. Therefore, it is possible to easily control the deployment.

  When the high-pressure bag 11 and the low-pressure bag 12 are two bags that are configured by partitioning a single bag with a partition wall 13 and share the partition wall 13, as shown in FIG. , The communication hole 15 is provided in the partition wall 13, and the vent hole 16 is provided in the low-pressure bag 12, so that the high-pressure bag 11 is deployed first, and then the deployment order is reliably set so that the low-pressure bag 12 is deployed. In addition, the internal pressure of the low-pressure bag 12 can be reliably lower than the internal pressure of the high-pressure bag 11.

  As shown in FIGS. 5 and 6, the airbag deployment sewing portion 20 (the side airbag is broken when the side airbag is deployed and inflated) from the seatback 17. The sewing part to be taken out is extended vertically and wraps around at least one of the upper end (curved part) and the lower end (curved part) of the seat back 17. This extended configuration of the sewing portion 20 is particularly effective when the high-pressure bag 11 is long in the vertical direction.

  By adopting this sewing portion extension structure, the high-pressure bag 11 that is long in the vertical direction can be easily deployed outside the seat back 17 by breaking the sewing portion 20. If the sewing portion 20 is stopped at the middle part in the vertical direction of the seat back as in the prior art, the high pressure bag 11 may not be deployed outside the seat back from there, and the folded high pressure bag 11 is lengthened in the vertical direction. May be less effective.

  As shown in FIG. 7, the deployment order is set so that the high-pressure bag 11 is opened simultaneously with the low-pressure bag 12 or first. This may be performed by separately providing an inflator for the high-pressure bag 11 and the low-pressure bag 12 and operating the inflator of the high-pressure bag 11 first. A structure for supplying the inflation gas to the high-pressure bag 11 first may be incorporated in the flow path and / or opening from the inflator to the bags 11 and 12. Alternatively, as described above, the partition wall 13 may be provided in the high-pressure bag 11 and the low-pressure bag 12, the communication hole 15 may be provided in the partition wall 13, and the vent hole 16 may be provided in the low-pressure bag 12.

  By adopting a configuration in which the high-pressure bag 11 is opened at the same time as the low-pressure bag 12 or first, the high-pressure bag unfolds first to move the occupant D away from the side door 14 at the time of a side collision of the vehicle, and the occupant D and the side door 14 The low-pressure bag 12 having a time margin can be deployed in the gap between the occupant D and the side door 14. By doing so, the occupant D can be quickly kept away from the side door for safety, and the low-pressure bag 12 can be reliably expanded and absorbed to absorb the impact of the collision.

  In order to smoothly and quickly expand and inflate the high-pressure bag 11 that is long in the vertical direction and the low-pressure bag 12 that is long in the front-and-rear direction, the high-pressure bag 11 is folded in the front-and-rear direction as shown in FIGS. The low-pressure bag 12 is folded in the up-down direction and then folded in the front-rear direction.

  By adopting this folding configuration, the high-pressure bag 11 that is long in the vertical direction is first deployed in the vertical direction (particularly downward) that is difficult to deploy, and then deployed forward. The low-pressure bag 12 that is long in the front-rear direction is first deployed forward, which is difficult to deploy, and then deployed in the vertical direction. Therefore, it is possible to easily control the deployment of the high-pressure bag 11 and the low-pressure bag 12 that are wrapped in a side view depending on how the bag is folded. 8 and 9, the bellows folding (bellows folding) is shown as the bag folding method, but the present invention is not limited to this, and other folding methods such as roll folding may be combined with different folding methods. Also good.

As shown in FIGS. 10 and 11, the high-pressure bag 11 and the low-pressure bag 12 are connected to an inflator 21 (the inflator 21 may be contained in the bags 11 and 12), and an inflating gas from the inflator 21. Accept.
FIG. 10 shows a case where the inflator 21 is a single cylinder type inflator. However, the inflator may be provided separately for the high pressure bag 11 and the low pressure bag 12.

  In the case of FIG. 10, the inflator 21 is disposed in a cylindrical diffuser 22, a plurality of gas ejection holes 23 are formed in the diffuser 22, and the dimensions and installation positions of the gas ejection holes 23 are appropriately set. Thus, the pressure and amount of the inflation gas to the high pressure bag 11 and the low pressure bag 12 are controlled. For example, as shown in FIG. 10, the inflator 21 is fixed in the diffuser 22 with a small gap with a caulking 24 or the like, and the gas ejected from the inflator 21 is discharged from a wide space in the lower part of the diffuser 22. The gas passing through the gap between the inflator 21 and the diffuser 22 from a wide space becomes low pressure due to flow resistance, and is supplied to the low pressure bag 12 through the gas ejection hole 23 in the upper part of the diffuser 22. . By doing so, high-pressure and low-pressure gases can be supplied to the high-pressure bag 11 and the low-pressure bag 12, respectively, even if the single inflator 21 is used.

  By taking the configuration of FIG. 10, the amount of gas supplied to the high pressure bag 11 and the low pressure bag 12 can be easily controlled by adjusting the size and position of the gas ejection holes 23 formed in the diffuser 22.

  An example of the structure for supplying the inflation gas from the diffuser 22 of FIG. 10 to the high-pressure bag 11 and the low-pressure bag 12 is shown in FIG. As shown in FIG. 11, the low-pressure bag 12 was folded and covered on the diffuser 22 from above, and the high-pressure bag 11 was folded and put on the diffuser 22 from below.

  11, the gas can be supplied to the high-pressure bag 11 and the low-pressure bag 12, and the high-pressure bag 11 is expanded downward, and the low-pressure bag 12 is expanded forward. The deployment of the bag 12 can be prevented from interfering with each other with a simple configuration.

  As shown in FIG. 12, the high-pressure bag gas injection hole 23 a of the gas injection hole 23 opens toward the outside of the vehicle, and the low-pressure bag gas injection hole 23 b of the gas injection hole 23 is high-pressure. The gas direction is offset with respect to the bag gas ejection hole and opens toward the inside of the vehicle. This structure is desirably used in combination with the structure shown in FIG. However, the structure of FIG. 12 may be used alone without being used together.

By adopting this configuration, it is possible to prevent both bags 11 and 12 from overlapping and becoming difficult to deploy during deployment.
Further, since the gas ejection hole 23a for the high-pressure bag is opened toward the outside of the vehicle and the gas ejection hole 23b for the low-pressure bag is opened toward the inside of the vehicle, the occupant has an impact on the deployment of the high-pressure bag 11. It can be made difficult to receive.

  The side airbag device 10 further includes an occupant detection sensor that detects the physique of the occupant. As shown in FIG. 13, the side airbag device 10 includes a deployment control device 100 (a device having the control routine of FIG. 13). The routine of the deployment control device 100 in FIG. 13 is interrupted at predetermined time intervals. When the deployment control device 100 in FIG. 13 determines whether a side collision has occurred or is likely to occur based on a signal from a side collision sensor (not shown), and if it is determined that a side collision has occurred or is likely to occur, Proceeding to the next step (102), a step 102 for determining whether the occupant is a small occupant based on a signal from an occupant detection sensor (not shown, usually a load sensor embedded in the seat), and the occupant Step 103 for deploying only the low-pressure bag when it is determined that the passenger is a small passenger, and Step 104 for deploying both the low-pressure bag 12 and the high-pressure bag 11 unless the passenger is determined to be a small passenger. Including.

  By providing the deployment control device 100, it is possible to suppress an excessive load from the side airbag (particularly, the high-pressure bag 11) to a small occupant, and appropriately occupant from a side collision of the vehicle according to the physique of the occupant. It is possible to protect.

The above can be applied to the first and second embodiments of the present invention, and part of the above can be applied to the third embodiment of the present invention.
The side airbag device 10 according to the first embodiment of the present invention further includes the following configurations, functions, and effects.

  In the side airbag apparatus 10 of Example 1 of this invention, as shown in FIGS. 1-4, the high voltage | pressure bag 11 and the low voltage | pressure bag 12 are accommodated in the window side part of the seat back 17 (with seat back attachment, Placed in the seat back). The high-pressure bag 11 is deployed on the door trim 25 side (the side close to the door trim 25) in the space between the door trim 25 and the occupant D, and the low-pressure bag 12 is on the occupant D side in the space between the door trim 25 and the occupant D ( The deployment direction is set so as to deploy to the side close to the occupant D). 1 and 2 show a state in which the bags 11 and 12 are pulled out from the seat back cushion by breaking the sewing portion. FIG. 2 shows the chest position, and the high-pressure bag 11 contacts the occupant D at the portion of the scapula and pushes the occupant D, but the chest is further away from the door trim 25 than the scapula. There is a gap between them, and the low-pressure bag 12 is expanded and inflated in the gap.

  Regarding the operation and effect of the side airbag device 10 of the first embodiment, the high-pressure bag 11 is deployed on the door trim 25 side in the space between the door trim 25 and the occupant D, and the low-pressure bag 12 is deployed on the occupant D side. The low-pressure bag 12 can intervene between the high-pressure bag 11 and the occupant D, and the interposition of the low-pressure bag 12 easily follows the side surface of the occupant D. By being along the side surface of the occupant D, the load of the occupant D can be dispersed and uniform, and the occupant D protection performance of the side airbag device 10 is improved.

  In the side airbag device 10 according to the second embodiment of the present invention, as shown in FIGS. 15 to 17, the high-pressure bag 11 and the low-pressure bag 12 are accommodated in the window side portion of the seat back 17, and the high-pressure bag 11 is a door trim. The deployment direction is set so that the space between the passenger 25 and the passenger D is deployed on the passenger D side, and the low-pressure bag 12 is deployed on the door trim 25 side. 15 and 16 show a case where the high-pressure bag 11 extends vertically from the side of the scapula Du portion of the occupant D to the side of the waist D1, and FIG. 17 shows the high-pressure bag 11 of the chest of the occupant D. The case where it is located in a side part and is short in the up-and-down direction (it is shorter than the case of FIG. 15) is shown.

  Regarding the operation and effect of the side airbag device 10 of the second embodiment, the high-pressure bag 11 is deployed on the occupant D side (side closer to the occupant) in the space between the door trim 25 and the occupant D, and the low-pressure bag 12 is the door trim. Since the high-pressure bag 11 is closer to the occupant D side (compared to the first embodiment), the effect of moving the occupant D away from the side door 14 (or the door trim 25) is low pressure. It is higher than when the bag 12 is inside (inside the high-pressure bag 11).

In the side airbag device 10 according to the third embodiment of the present invention, as shown in FIGS. 18 to 20, the high-pressure bag 11 is accommodated in the window side portion of the seat back 17, and the low-pressure bag 12 is disposed in the door trim 25. Has been.
An inflator 21 is housed in each of the high-pressure bag 11 and the low-pressure bag 12 independently.
As shown in FIG. 20, the low-pressure bag 12 is folded in a bellows direction in the vehicle front-rear direction, and expands and inflates in the vehicle front-rear direction in the front-rear direction of the passenger D.

  Regarding the operation and effect of the side airbag device 10 of the third embodiment, the low-pressure bag 12 is provided with a side door (with a door trim 25), thereby improving the bag deployment performance of the low-pressure bag 12 and expanding the protection area. It becomes possible. In addition, since the side door-attached bag can be at a low pressure, the load on the occupant by the low-pressure bag 12 can be reduced.

It is a side view of the side airbag apparatus of Example 1 of this invention. It is the top view seen along the AA line of FIG. 1 of the side airbag apparatus of Example 1 of this invention. It is a side view in case the high pressure bag of the side airbag apparatus of Example 1 of this invention is short compared with the case of FIG. It is a side view at the time of extending the sewing part for side airbag deployment of a seat back to the upper and lower ends of a seat back of the side airbag device of Example 1 of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a seat back in which a sewing part for airbag deployment is extended to a curved (R) end of a seat back upper and lower end of the side airbag device according to the first embodiment of the present invention. It is sectional drawing of the side airbag apparatus of FIG. It is an expansion | deployment timing diagram (pressure vs time diagram) of the high-pressure bag and low-pressure bag of Example 1 of the present invention. It is a front view which shows the folding method of the high voltage | pressure bag of the side airbag apparatus of Example 1 of this invention. It is a front view which shows the folding method of the low voltage | pressure bag of the side airbag apparatus of Example 1 of this invention. It is a see-through | perspective perspective view of a diffuser and an inflator of the side airbag apparatus of Example 1 of this invention. It is a front view which concerns on the assembly of a bag and a diffuser of the side airbag apparatus of Example 1 of this invention. It is a front view which shows the offset of the gas direction of a diffuser or an inflator of the side airbag apparatus of Example 1 of this invention. It is a control routine figure which judges whether a high-pressure bag is turned ON by the side airbag apparatus of Example 1 of this invention depending on whether it is a small passenger. It is a system diagram and a graph which show the reason why a high pressure bag keeps an occupant away from a side door of a side airbag device of Example 1 of the present invention by comparison with a conventional device. It is a side view of the side airbag apparatus of Example 2 of this invention. It is the top view seen along the AA line of FIG. 15 of the side airbag apparatus of Example 2 of this invention. It is a side view in case the high pressure bag of the side airbag apparatus of Example 2 of this invention is short compared with the case of FIG. It is a side view of the side airbag apparatus of Example 3 of this invention. It is the top view seen along the AA line of FIG. 18 of the side airbag apparatus of Example 3 of this invention. It is a schematic plan view of the low pressure bag and its inflator of the side airbag device of Example 3 of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Side airbag apparatus 11 High pressure bag 12 Low pressure bag 13 Partition wall 14 Side door 15 Communication hole 16 Vent hole 17 Seat back 18 Side skin 19 Front skin 20 Airbag deployment sewing part 21 Inflator 22 Diffuser 23 Gas ejection hole 23a High pressure Gas ejection hole for bag 23b Gas ejection hole for low pressure bag 24 Caulking 25 Door trim 100 Deployment control device D Crew Dr Rear passenger Df Crew front Du Crew scapula Dl Crew waist H11 Vertical dimension H12 of high pressure bag Vertical dimension

Claims (15)

  A side airbag device having a high-pressure bag and a low-pressure bag having different internal pressures, wherein the high-pressure bag is provided at a rear side of the occupant in a deployed state, and the low-pressure bag is in a front part of the occupant in the deployed state And a side airbag device provided so as to be located on the side of the rear part.   The side airbag apparatus according to claim 1, wherein the high-pressure bag has a larger vertical dimension than the low-pressure bag.   The side airbag device according to claim 1 or 2, wherein the high-pressure bag extends from a side portion of the scapula of the occupant to a side portion of the waist.   The side airbag device according to any one of claims 1 to 3, wherein the high-pressure bag and the low-pressure bag are independent bags.   The side airbag according to any one of claims 1 to 3, wherein the high-pressure bag and the low-pressure bag are two bags configured by partitioning a single bag body with a partition wall and sharing the partition wall. apparatus.   The side airbag device according to any one of claims 1 to 5, wherein a sewing portion for airbag deployment of the side skin of the seat back and the front skin is wound around at least one of an upper end and a lower end of the seat back.   The side airbag device according to any one of claims 1 to 6, wherein a deployment order is set so that the high-pressure bag is opened simultaneously with the low-pressure bag or first.   8. The high-pressure bag according to claim 1, wherein the high-pressure bag is folded in the vertical direction after being folded in the front-rear direction, and the low-pressure bag is folded in the front-rear direction after being folded in the vertical direction. Side airbag device.   The high-pressure bag and the low-pressure bag are connected to an inflator, and the inflator is a single cylinder type inflator, the inflator is disposed in a diffuser, and a plurality of gas injection holes are formed in the diffuser. The side airbag apparatus of any one of Claims 1-8 which controlled the pressure and quantity of the gas for expansion | swelling to the said high pressure bag and the said low pressure bag with the dimension of the gas ejection hole.   The side airbag device according to claim 9, wherein the low-pressure bag is folded and covered with a diffuser from above, and the high-pressure bag is folded and covered with a diffuser from below.   Among the gas ejection holes, the gas ejection hole for the high-pressure bag opens toward the vehicle outer side, and among the gas ejection holes, the gas ejection hole for the low-pressure bag is the gas ejection hole for the high-pressure bag. The side airbag device according to claim 9 or 10, wherein the side airbag device is opened toward the inner side of the vehicle by being offset in direction from the vehicle.   An occupant detection sensor for detecting the physique of the occupant is further provided. When it is determined that the occupant is a small occupant based on a signal from the occupant detection sensor, only the low-pressure bag is deployed, and the occupant is a small occupant. The side airbag device according to any one of claims 1 to 11, further comprising a deployment control device that deploys both the low-pressure bag and the high-pressure bag, except when determined to be.   The high-pressure bag and the low-pressure bag are housed in the window side portion of the seat back so that the high-pressure bag is deployed on the door trim side in the space between the door trim and the occupant and the low-pressure bag is deployed on the occupant side. The side airbag device according to any one of claims 1 to 12, wherein a deployment direction is set.   The high-pressure bag and the low-pressure bag are housed in the window side portion of the seat back so that the high-pressure bag is deployed on the occupant side in the space between the door trim and the occupant and the low-pressure bag is deployed on the door trim side. The side airbag device according to any one of claims 1 to 12, wherein a deployment direction is set.   The said high voltage | pressure bag is accommodated in the window side side part of the seat back, The said low voltage | pressure bag is arrange | positioned in the door trim, The claim 1 of any one of Claims 1-4 and Claim 7 and Claim 12. Side airbag device.

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