JP2009018715A - Side airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a side airbag device capable of restraining an interfering article from being pushed forward by an airbag even when the interfering article exists at a position where the airbag inflates and deploys. <P>SOLUTION: This side airbag device has the first airbag 21 and the second airbag 22 arranged side by side in the vehicle width direction between an occupant and a door D and to inflate and deploy toward the front from the rear of the vehicle in collision of the vehicle. The first airbag 21 inflates and deploys in correspondence with a body portion including at least a waist part of the occupant. The second airbag 22 is furnished with a waist inflation part 23 in correspondence with the waist part of the occupant and at least a front end of which is constituted free to be separated from the first airbag 21 and inflates and deploys to a center of a vehicle room in the vehicle width direction of the first airbag 21. The second airbag 22 is set so that its front end in a deployed state is positioned to the rear more than the front end of the first airbag 21 in the deployed state. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a side airbag device including two airbags that are deployed and inflated between a passenger compartment side wall and an occupant.

  2. Description of the Related Art Conventionally, as described in, for example, Patent Document 1, there is a two-chamber side airbag device including two airbags that are deployed and inflated in a vehicle width direction between a passenger compartment side wall and an occupant.

A side airbag device described in Patent Literature 1 includes a first side airbag that is deployed and inflated between the occupant's shoulder and the waist between the occupant and the side wall of the passenger compartment, and the first side airbag and the passenger compartment. And a second side airbag that is deployed and inflated corresponding to the occupant's waist between the side walls. In the side airbag device, when the other vehicle collides with the vehicle in a side collision, both the first side airbag and the second side airbag are deployed and inflated from the seat back portion toward the front. In this way, the side airbag device fills the space between the occupant's waist and the side wall of the passenger compartment in the vehicle width direction, and pushes the occupant to the passenger compartment by pushing the waist portion having relatively high resistance at each part of the human body. While moving toward the center, the impact at the time of collision is buffered by the first side airbag that is deployed and inflated from the shoulder portion to the waist portion for portions other than the waist portion.
JP 2004-330925 A

  By the way, when a load is placed at a position where the airbag is deployed and inflated on the vehicle seat, there may be an interference in the position where the two airbags are deployed and inflated. In such a case, when the two airbags are deployed and inflated, the interference is pushed forward by the two airbags, or the airbag cannot be smoothly deployed by the interferences, so that the inflation becomes insufficient. The bag itself can be affected.

  The present invention has been made in view of such circumstances, and even when an interference is present at a position where the airbag is deployed and inflated, the interference is pushed forward by the airbag, An object of the present invention is to provide a side airbag device capable of suppressing insufficient expansion.

  In order to achieve the above object, according to a first aspect of the present invention, a first vehicle that expands and expands from the rear to the front of the vehicle is arranged in the vehicle width direction between the occupant and the passenger compartment side wall when the vehicle collides. A side airbag device having a second airbag and a second airbag, wherein the first airbag is deployed and inflated corresponding to a body part including at least a waist portion of an occupant. The airbag includes a waist inflating portion corresponding to a waist portion of an occupant, and at least a front end portion of the airbag is configured to be separable from the first airbag, so that the vehicle compartment in the vehicle width direction than the first airbag. The gist of the invention is that it is deployed and inflated near the center, and is set so that its front end in the deployed state is located behind the front end in the deployed state of the first airbag.

  In the above configuration, when each of the first and second airbags is deployed and inflated, the front end portion of the second airbag located inside the vehicle is located behind the front end portion of the first airbag. . Therefore, when there is an interference object at the position where the two airbags are deployed and inflated in the vehicle seat, the first and second airbags abut against the interference object, and then the second airbag is deployed and inflated. Even after finishing, the first airbag continues to expand and expand forward. Thus, when only the first airbag is deployed and inflated forward, both the first and second airbags push the interference with a weaker force than pushing the interference forward. The airbag 1 is deployed and inflated so as to enter between the interference object and the vehicle side wall so as to avoid the interference object. As a result, the first airbag and the second airbag are deployed and inflated so as to form a substantially “V” shape with the interference in between. That is, when there is an interference in the position where these two airbags are deployed and inflated, the first airbag is deployed and inflated from the rear to the front along the side wall of the passenger compartment, while the second airbag is As a result, the front end portion separable from the first airbag changes its direction toward the center of the passenger compartment, and the two airbags are deployed and inflated to form a substantially “V” shape. Therefore, according to the above configuration, when there is an interference object at a position where the airbag is deployed and inflated, the two airbags are deployed and inflated in different directions with respect to the interference object. Can be suppressed. In addition, according to the above configuration, even when the weight of the interference object is relatively large, the two airbags can be deployed and inflated so as to avoid the interference object. Can inflate.

  When there is no interference in the airbag inflated and inflated position and the occupant is seated in a normal state on the vehicle seat, the occupant pushes the occupant's relatively strong waist with the second airbag. The passenger can be protected in the same manner as in the prior art by moving the vehicle toward the center of the passenger compartment and protecting the passenger from the components constituting the passenger compartment side wall by the first airbag.

  Specifically, according to the invention described in claim 2, in the deployed state of each of the first and second airbags, the front end of the second airbag from the rear end portion of the first airbag. The length to the portion is set to be 50 to 90% of the length from the rear end portion to the front end portion of the first airbag.

  The invention according to claim 3 is the gist of the invention according to claim 1 or 2, wherein the first airbag and the second airbag are connected to each other at a rear portion. To do.

  According to the above configuration, when there is an interfering object at the position where the two airbags are deployed and inflated, the first airbag and the second airbag are centered on the rearwardly connected parts. The front part thereof is easy to turn into a substantially “V” shape. Therefore, when there is an interference object at the position where the airbag is deployed and inflated, it is possible to suppress the interference object from being pushed forward, and it is possible to prevent the airbag from being prevented from being inflated by the interference object. Can expand sufficiently.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the first airbag and the second airbag are communicated with each other at the portion where the first airbag and the second airbag are coupled to each other. This is the gist.

  According to said structure, since the 1st airbag and the 2nd airbag are connecting, gas can be supplied to these two airbags from one gas generator. Moreover, by supplying gas to two airbags from one gas generator in this way, it can suppress that the timing which two airbags expand | deploy and inflate is shifted | deviated.

The invention according to claim 5 is the gist of the invention according to any one of claims 1 to 4, wherein the first airbag is deployed and inflated from the shoulder portion of the occupant to the waist portion. To do.
According to the above configuration, when there is no interfering object in the deployed and inflated position of the airbag and the occupant is seated in a normal state on the vehicle seat, the lumbar region from the occupant's shoulder to the waist Can protect up to the whole.

  The invention according to claim 6 is the invention according to claim 5, wherein the second airbag includes a shoulder inflating portion corresponding to a shoulder portion of an occupant, and the waist inflating portion and the shoulder inflating portion. The gist is that the space is formed as a space.

  According to the above configuration, when the occupant is seated in a normal state on the vehicle seat without any interference at the airbag inflated and inflated position, the waist portion relatively strong by the second airbag. And the shoulder can be pushed to move the occupant closer to the center of the passenger compartment. Further, since the second airbag is formed as a space between the shoulder and waist of the occupant, that is, the portion corresponding to the chest and abdomen of the occupant, when the second airbag is deployed and inflated It can suppress that an impact is given with respect to a comparatively weak tolerance chest and abdomen. Further, the occupant can be protected from the parts constituting the compartment side wall by the first airbag.

  The invention according to claim 7 is the invention according to claim 6, wherein the second airbag has a lower end portion of the waist inflation portion and an upper end portion of the shoulder inflation portion connected to the first airbag. On the other hand, the gist is that the portion from the front end to the upper end of the waist inflatable portion and the portion from the front end to the lower end of the shoulder inflatable portion are configured to be separable from the first airbag. To do.

  According to the above configuration, since the upper and lower end portions of the second airbag are connected to the first airbag, there is no interfering object at the airbag inflating and inflating position, and the occupant is properly attached to the vehicle seat. When seated in this state, the second airbag is deployed and inflated from the rear of the vehicle to the front together with the first airbag. Accordingly, the occupant can be moved closer to the center of the passenger compartment by the second airbag, and the occupant can be protected from the components constituting the compartment side wall by the first airbag.

  Moreover, since the site | part from the front-end part to an upper end part in the waist expansion part of a 2nd airbag and the site | part from the front-end part to a lower end part in a shoulder expansion part are separable from a 1st airbag, an airbag is When there is an interference in the position where the air bag expands and inflates, the portion of the second airbag that is separable from the first airbag changes its direction toward the center of the passenger compartment. Thus, when there is an interference in the position where the airbag is deployed and inflated, the second airbag and the first airbag can be opened in a substantially “V” shape. It is possible to suppress the object from being pushed forward.

  The invention described in claim 8 is the invention described in any one of claims 5 to 7, comprising a restricting means for restricting expansion in a portion corresponding to the abdomen from the chest of the occupant in the first airbag. Is the gist.

  According to said structure, it can suppress that an impact is given with respect to a passenger | crew's comparatively weak chest and abdominal part at the time of expansion | deployment of a 1st airbag. As this restricting means, a well-known aspect such as providing a tether in the first airbag or providing a seam for restricting the expansion of the first airbag can be appropriately employed.

  In the side airbag device according to the present invention, when the two airbags are deployed and inflated, the front end portion of the second airbag is located behind the front end portion of the first airbag. When the interference exists, it can be suppressed that the interference is pushed forward by the airbag and the airbag is not sufficiently expanded.

Hereinafter, an embodiment in which the side airbag device of the present invention is embodied will be described with reference to FIGS.
As shown in FIG. 1, a seat 10 provided in a vehicle interior includes a stool 12 fixed on a vehicle floor through a slide rail 11, and a back of the stool 12 supported by the stool 12. A backrest portion 13 extending upward from the end portion and a headrest 14 supported by the backrest portion 13 are provided. And the side airbag apparatus 20 of this embodiment is incorporated in the part by the side of the compartment side wall in the backrest part 13, as shown in FIG.

  As shown in FIG. 1, the side airbag device 20 is arranged from the front surface of the backrest portion 13 aligned in the vehicle width direction between the occupant P and the vehicle door D constituting the vehicle compartment side wall at the time of a side collision of the vehicle. There are provided first and second airbags 21 and 22 that are deployed and inflated forward. The first airbag 21 is deployed and inflated on the vehicle door side, and the second airbag 22 is deployed near the center of the vehicle. Further, the side airbag device 20 of the present embodiment includes a common inflator 30 for deploying and inflating the first and second airbags 21 and 22. For example, when another vehicle has a side collision with this vehicle, the gas discharged from the inflator 30 is supplied to the insides of the first and second airbags 21 and 22, respectively. And each 2nd airbag 21 and 22 will expand | deploy and expand toward the front from the backrest part 13 of a vehicle.

Next, the configuration of the first airbag 21 and the second airbag 22 of the present embodiment will be described in more detail with reference to FIGS. 1 and 2.
The length of the first airbag 21 in the vertical direction is set to be substantially the same as the height of the backrest portion 13, and the length in the front-rear direction of the vehicle is the front half of the backrest portion 13 and the latter half of the seat portion 12. It is set to a length corresponding to the minute, and is configured to expand and expand corresponding to the waist, abdomen, chest and shoulders at the body part of the occupant P seated on the seat 10. Further, the first airbag 21 is inflated and inflated so that the lower end portion thereof is positioned below the upper end portion of the stool portion 12. Further, the first airbag 21 is formed with an annular regulating seam 28 at a central portion in the vertical direction, that is, a portion corresponding to the chest to the abdomen of the occupant P. When the bag 21 is expanded and inflated, the expansion of this portion is restricted.

  The second airbag 22 is formed in a substantially “U” shape that opens forward in a side view, and a waist inflation portion 23 corresponding to the waist portion of the body part of the occupant P, and a shoulder inflation corresponding to the shoulder portion. Part 24, and intermediate part 25 which connects these waist inflating part 23 and shoulder inflating part 24 at the back end, and the length of the up-and-down direction is set as the same length as the 1st airbag 21 Yes. The length of the second airbag 22 in the longitudinal direction of the vehicle is set shorter than the length of the first airbag 21. Specifically, the rear portion of the second airbag 22 is connected to the rear portion of the first airbag 21, and the rear end portions of the airbags 21 and 22 are in the vehicle front-rear direction. It corresponds in the position of. In the deployed state of the first and second airbags 21 and 22, the length S2 from the rear end of the two airbags 21 and 22 to the front end of the second airbag 22 is It is set to be about 70% of the length S1 from the end portion to the front end portion of the first airbag 21. As a result, the front end portion of the second airbag 22 is located behind the front end portion of the first airbag 21 in the deployed state of the airbags 21 and 22. It should be noted that the length S2 of the second airbag 22 is such that the two airbags 21 and 22 have a length S2 when there is an interference at the position where the two airbags 21 and 22 described in detail later are deployed and inflated. It is set from the viewpoint of securing the airbag performance such that it is easy to deploy and inflate in a substantially “V” shape with the interfering object interposed therebetween and to easily receive the interfering object. Specifically, the length S2 in the front-rear direction of the second airbag 22 is not particularly limited, but when the length S1 in the front-rear direction of the first airbag 21 is used as a reference, the length S1 of 50 is determined. It is preferably located in the range of -90%, more preferably in the range of 60-80%. That is, the airbag performance can be secured by positioning the length S2 of the second airbag 22 in the front-rear direction within a range of 50 to 90% of the length S1 of the first airbag 21. By setting the length of the first airbag 21 within a range of 60 to 80% of the length S1, the airbag performance can be more accurately ensured.

  Further, as described above, the rear portions of the first and second airbags 21 and 22 are connected to each other, but the interiors of the bags are connected to each other at the rear portions that are connected to each other. Yes. As a result, gas can be supplied from one inflator 30 to these two airbags 21 and 22. Note that the amount of gas discharged from the inflator 30 to be supplied to each airbag 21, 22 per unit time is greater than the amount supplied to the second airbag 22 than the amount supplied to the second airbag 22. Is set to be more. In order to make the gas supply amounts per unit time to the airbags 21 and 22 different as described above, a well-known aspect can be appropriately adopted. Specifically, for example, the number and size of gas discharge holes formed in the inflator 30 are made different between the first airbag 21 side and the second airbag 22 side, or discharged from the inflator 30. For example, a diffuser for adjusting the direction of gas flow may be provided.

  Further, the first and second airbags 21 and 22 are connected in such a manner that the upper end portion and the lower end portion are co-sewn together in addition to the rear portions being connected to each other. The other parts are configured to be separable. Specifically, as shown by a two-dot chain line A in FIG. 2, the second airbag 22 has the lower end portion of the waist inflating portion 23 and the lower end portion of the first airbag 21 sewed together, As indicated by a two-dot chain line B in FIG. 2, the upper end portion of the shoulder inflating portion 24 and the upper end portion of the first airbag 21 are sewn together. And the second airbag 22 extends from the lower end portion of the waist inflatable portion 23, the upper end portion of the shoulder inflatable portion 24 and the rear portion, that is, from the front end portion to the upper end portion of the waist inflatable portion 23. A portion including the front end portion to the lower end portion of the shoulder inflating portion 24 is configured to be separable without being connected to the first airbag 21.

  The first and second airbags 21 and 22 are manufactured as follows. FIG. 3 is a diagram showing the states of the first and second airbags 21 and 22 in each manufacturing process.

  Each of the first and second airbags 21 and 22 is formed of an outer panel 41 and an inner panel 42 as shown in FIG. The outer panel 41 is disposed outside the airbags 21 and 22 in the state where the first and second airbags 21 and 22 are deployed and inflated (in the first airbag 21, the side walls of the passenger compartment and the second airbag). The part located in the vehicle compartment center side) is configured. The inner panel 42 constitutes an inner portion of each of the airbags 21 and 22, and the inner panel 42 has the same vertical length as the vertical length of the outer panel 41 in the state of being disposed in the vehicle. The length in the front-rear direction is set shorter than that of the outer panel 41.

  Then, as shown in FIG. 3B, the outer panel 41 and the inner panel 42 are arranged in a state where the front end portions of the second airbag 22 in the panels 41 and 42 are overlapped. The stitches are sewn as shown by the broken line a. In this state, the outer panel 41 and the inner panel 42 are folded back at portions serving as boundaries between the first airbag 21 and the second airbag 22 respectively indicated by alternate long and short dash lines c and d in FIG. Then, the state shown in FIG. In the state shown in FIG. 3 (c), the outer panel 41 and the inner panel 42 have the same front end portion of the first airbag 21 in each panel 41, 42. In this state, as shown in FIG. As shown by the broken line b, the upper end portion, the front end portion, and the lower end portion of the first airbag are sewn together. At this time, as described above with reference to FIG. 2, the lower end portion of the waist inflating portion 23 and the lower end portion of the first airbag 21 in the second airbag 22 are sewn together, so that the second airbag The upper end portion of the shoulder inflating portion 24 and the upper end portion of the first airbag 21 are sewn together. Then, as shown in FIG. 3 (d), a regulation seam 28 is formed on the first airbag 21. For convenience of description of this manufacturing method, the broken line a shown in FIG. 3B, which is the stitch at the front end of the second airbag 22, is shown in FIG. The broken line a shown in FIG. 3B and the broken line b shown in FIG.

  As described above, the length of the inner panel 42 in the front-rear direction is set shorter than the length of the outer panel 41 in the front-rear direction. Therefore, in the airbags 21 and 22 manufactured in this manner, the outer membrane length of the two airbags 21 and 22 is longer than the inner membrane length as shown in FIG. Will be formed.

Next, the operation of the side airbag device 20 according to the present embodiment will be described with reference to FIG. 1 and FIGS.
First, in the vehicle seat 10, there is no interfering object such as luggage at the position where the two airbags 21 and 22 of the side airbag device 20 are deployed and inflated, and the occupant P is seated in a normal state. The operation of the side airbag device 20 will be described with reference to FIGS. 1 and 4.

  For example, when another vehicle collides with the door D of this vehicle, an impact sensor (not shown) detects this collision. When the inflator 30 is activated based on the detection of the impact sensor, the gas discharged from the inflator 30 is supplied into the first and second airbags 21 and 22, as shown in FIGS. Further, the first and second airbags 21 and 22 are deployed and inflated. That is, in the present embodiment, the first airbag 21 and the second airbag 22 are communicated with each other at the rear portion thereof, so that gas is supplied into the bag by the common inflator 30 and each airbag is The bags 21 and 22 are expanded and inflated at the same timing. At this time, the amount of gas supplied to the airbags 21 and 22 per unit time is greater than that of the second airbag 22 as indicated by the arrow in FIG. Will be more.

  The first airbag 21 and the second airbag 22 are, as shown in FIG. 4, a space between the waist and shoulders of the occupant P and the inner surface of the door D in a state of being aligned in the vehicle width direction. Fill. That is, as described above, since the upper and lower ends of the second airbag 22 are connected to the first airbag 21, there is an interference in the position where the two airbags 21 and 22 are deployed and inflated. If the vehicle does not exist, the second airbag 22 is deployed and inflated together with the first airbag 21 from the rear to the front of the vehicle to fill the space between the occupant P and the door D. Also, as described above with reference to FIG. 2 (a), the inner membrane length of each airbag 21, 22 is set to be shorter than the outer membrane length, so that the inner membrane length is also the outer membrane length. When the airbags 21 and 22 are deployed and inflated, the airbags 21 and 22 are restrained from pressing against each other. That is, when the occupant P is seated on the seat 10 in a regular state, the airbags 21 and 22 are deployed from the rear to the front of the vehicle, but are prevented from pushing against each other in the vehicle width direction. Therefore, opening in the vehicle width direction is suppressed. The second airbag 22 includes a waist inflating portion 23 and a shoulder inflating portion 24, while a space is formed between the inflating portions 23 and 24. Accordingly, when the second airbag 22 is deployed and inflated, the waist and shoulders of the occupant P, which are relatively resistant, are pushed, and the occupant P can be moved closer to the center of the passenger compartment. When the airbag 22 is deployed and inflated, it is possible to suppress an impact from being applied to the chest and abdomen of the occupant P that are relatively resistant.

  Here, as described above, when the airbags 21 and 22 are deployed and inflated, the front end portion of the second airbag 22 is positioned behind the front end portion of the first airbag 21, The position reaches about 70% from the rear end of the first airbag 21 with reference to the length S1 of the airbag 21 in the front-rear direction. Therefore, the second airbag 22 is deployed to such an extent that the front end thereof reaches the front end of the waist and shoulders of the occupant P, for example. When the occupant P is seated on the seat 10 in a regular state, the occupant P can be preferably moved closer to the center of the passenger compartment. That is, the waist and shoulders of the occupant P can be pushed to move the entire body closer to the center of the passenger compartment, and the occupant P and the inner surface of the door D before the door D is deformed toward the passenger compartment due to a collision. A space of a predetermined distance or more can be secured between them. Then, as the deformation of the door D progresses due to a side collision of another vehicle, the entire body is moved closer to the center of the passenger compartment by pushing the waist of the occupant P, so that the distance between the occupant P and the inner surface of the door D exceeds a predetermined distance. By maintaining, the door D can be prevented from hitting the passenger P.

  Further, the first airbag 21 is expanded and inflated corresponding to the waist from the shoulder of the occupant P, and the expansion of the portion corresponding to the abdomen from the chest is regulated by the regulation seam 28. Accordingly, the entire portion from the shoulder portion to the waist portion of the occupant P can be protected from the vehicle door D by the first airbag 21, and the occupant P is relatively resistant when the first airbag 21 is deployed and inflated. It is possible to suppress the impact on the weak chest and abdomen.

  Next, the operation of the side airbag device 20 when an interference 50 such as luggage is placed at a position where the airbags 21 and 22 of the side airbag device 20 are deployed and inflated on the vehicle seat 10 will be described. . 5 is a side view when the airbags 21 and 22 are deployed and inflated when the interference object 50 is placed at a position where the two airbags 21 and 22 are deployed and inflated in the vehicle seat 10. FIG. FIG. 5A is a cross-sectional view taken along line AA in FIG. 5, and FIG. 5B is a cross-sectional view taken along line BB in FIG.

  As shown in FIGS. 5 and 6, for example, when another vehicle collides with the door D of the vehicle, the inflator 30 is actuated based on the detection result of an impact sensor (not shown), and the inside of each airbag 21, 22 is transmitted from the inflator 30. Is supplied with gas. And although each of these airbags 21 and 22 is deployed and inflated at substantially the same timing, when the interference object 50 is present at the position where each of the airbags 21 and 22 is deployed and inflated, the second airbag 22 is described above. It expands and expands in a manner different from the manner.

  Specifically, when the interference object 50 is present at a position where the first and second airbags 21 and 22 are deployed and inflated, the first airbag 21 and the second airbag 22 are connected to each other. It expands and expands in a substantially “V” shape across the interfering object 50 so that the front part rotates around the rear part. That is, in the present embodiment, when the first and second airbags 21 and 22 are deployed and inflated, the front end portion of the second airbag 22 positioned inside the vehicle is the front end of the first airbag 21. It will be located behind the part. Therefore, when the interference object 50 exists in the position which each airbag 21 and 22 expand | deploys and expands in the vehicle seat 10, the 1st and 2nd 2 airbags 21 and 22 contact | abut to an interference object, and 2nd after that. Even after the airbag 22 has been deployed and inflated, the first airbag 21 continues to be deployed and inflated forward. When only the first airbag 21 is deployed and inflated forward in this manner, the first airbag 21 enters between the interference 50 and the door D so as to avoid the interference 50. As a result, the first airbag 21 and the second airbag 22 are deployed and inflated so as to form a substantially “V” shape by receiving the interfering object 50 therebetween. Thus, in this embodiment, when the interference object 50 exists in the position where the two airbags 21 and 22 are deployed and inflated, the first airbag 21 is deployed and inflated from the rear to the front along the door D. On the other hand, the front end of the second airbag 22 that can be separated from the first airbag 21 by the interference 50 changes the direction toward the center of the passenger compartment. Further, as described above, the amount of gas per unit time supplied from the inflator 30 to each airbag 21, 22 is smaller in the second airbag 22 than in the first airbag 21. Since it is set, the second airbag 22 can be easily turned toward the center of the vehicle even with this configuration.

  As described above, the upper and lower ends of the second airbag 22 are sewn together with the upper and lower ends of the first airbag 21. Therefore, the second airbag 22 is a portion that can be separated from the first airbag 21 in the second airbag 22 in a state where the joint portion is connected to the first airbag 21, that is, A portion including the front end portion to the upper end portion of the waist expansion portion 23 expands and expands toward the center of the vehicle compartment. As shown in FIGS. 5 and 6, the interference object 50 exemplified in the present embodiment has an upper end portion located below the lower end portion of the shoulder expansion portion 24. Therefore, when the second airbag 22 is deployed and inflated, the front end portion of the waist inflating portion 23 hits the interference object 50, whereby the front end portion and the upper end portion of the waist inflating portion 23 are centered in the vehicle compartment by the interference material 50. It will expand greatly toward the side. The shoulder inflating portion 24 does not directly contact the interference object 50 when the second airbag 22 is inflated and inflated. However, the waist inflating portion 23 is greatly deployed toward the center of the vehicle compartment in this way. Will be deployed slightly toward the center of the passenger compartment. When the second airbag 22 is deployed and inflated, such as when the height of the interfering object is approximately the same as the vertical length of the second airbag, both the waist inflating portion 23 and the shoulder inflating portion 24 In the case of hitting an interference object, both of these two inflatable portions 23 and 24 are greatly expanded toward the center of the passenger compartment.

  In this way, the first airbag 21 and the second airbag 22 are expanded and inflated in a substantially “V” shape so as to sandwich the interference 50, and in a different direction with respect to the interference 50. Since the air bag 21 and 22 are deployed and inflated, the interference material 50 can be prevented from being pushed forward when the air bag 21 and 22 are deployed and inflated. In addition, since the first airbag 21 is interposed between the interference object 50 and the door D, the interference object 50 can be protected by the first airbag 21. Furthermore, even if the weight of the interference object 50 is large, the two airbags 21 and 22 can be deployed and inflated so as to avoid the interference object 50, so that the expansion is prevented from becoming insufficient. be able to.

According to the embodiment described above in detail, the following effects can be obtained.
(1) The side airbag device 20 of the present embodiment includes a first airbag 21 that expands and expands from the shoulder of the occupant P corresponding to the waist, and a waist inflatable portion that corresponds to the waist of the occupant P. And a second airbag 22 that is deployed and inflated closer to the center of the vehicle compartment in the vehicle width direction than the one airbag 21. The second airbag 22 is set so that the front end portion in the deployed state is located behind the front end portion in the deployed state of the first airbag 21. Therefore, when the interference 50 exists at the position where these two airbags 21 and 22 are deployed and inflated, the first airbag 21 is deployed and inflated from the rear to the front along the door D of the vehicle, while the second The direction of the air bag 22 is changed toward the center of the passenger compartment by the interference 50. Thus, since the two airbags 21 and 22 are deployed and inflated in different directions with respect to the interference object, the interference occurs when the interference object 50 exists at a position where the two airbags 21 and 22 are deployed and inflated. It can suppress that the thing 50 is pushed ahead. Further, even when the weight of the interference object is large, the two airbags 21 and 22 can be deployed and inflated so as to avoid the interference object, so that it is possible to prevent the expansion from being insufficient. it can.

  Further, when there is no interference in the deployed and inflated positions of the airbags 21 and 22 and the occupant P is seated in a normal state on the vehicle seat 10, the second airbag 22 causes the The occupant P can be moved closer to the center of the passenger compartment by pushing the strong waist portion, and the occupant P can be protected from the door D by the first airbag 21.

  In the present embodiment, the length S2 from the rear end portion of the first airbag 21 to the front end portion of the second airbag 22 in the deployed state of the first and second airbags 21 and 22 is: The first airbag 21 is set to be approximately 70% of the length S1 in the front-rear direction. Since the length in the front-rear direction of the second airbag is set in this way, the above-described cases in the case where the interference object 50 is present and in the case where the interference object 50 is not present exist at the position where the two airbags 21 and 22 are deployed and inflated. The effect can be accurately produced. Note that in the deployed state of the first and second airbags 21 and 22, the length from the rear end portion of the first airbag 21 to the front end portion of the second airbag 22 is the first airbag. 21 is preferably set to be 50 to 90% of the length from the rear end portion to the front end portion, and more preferably set to be 60 to 80%.

  (2) In the side airbag device 20 of the present embodiment, the first airbag 21 and the second airbag 22 are connected to each other at the rear portion. Thereby, when the interference object 50 exists in the position where the two airbags 21 and 22 are deployed and inflated, the first airbag 21 and the second airbag 22 are centered on the rearwardly connected parts. As a result, the front portion of the second airbag 22 can be easily turned into a “V” shape, and the second airbag 22 can be easily turned toward the center of the passenger compartment. Therefore, when the interference object 50 exists in the position where the two airbags 21 and 22 are deployed and inflated, it is possible to suppress the interference object 50 from being pushed forward, and the airbags 21 and 22 are inflated. It can suppress becoming inadequate.

  (3) In the side airbag device 20 of the present embodiment, the interior of the bag communicates with each other at a rear portion where the first airbag 21 and the second airbag 22 are coupled to each other. Thereby, gas can be supplied from one inflator 30 to these two first and second airbags 21 and 22, and it is possible to suppress the timing at which the two airbags are deployed and inflated.

  (4) In the side airbag device 20 of the present embodiment, the first airbag 21 is deployed and inflated corresponding to the waist from the shoulder of the occupant P. Therefore, when there is no interference in the deployed and inflated positions of the airbags 21 and 22 and the occupant P is seated in a normal state on the vehicle seat 10, the shoulder portion of the occupant P is secured by the first airbag 21. The entire body from the waist to the waist can be protected.

  (5) In the side airbag device 20 of the present embodiment, the second airbag 22 includes the shoulder inflation portion 24 corresponding to the shoulder portion of the occupant P, and between the waist inflation portion 23 and the shoulder inflation portion 24. Is formed as a space. As a result, when there is no interference in the deployed and inflated positions of the airbags 21 and 22 and the occupant P is seated in a normal state on the vehicle seat 10, the second airbag 22 is relatively resistant. In addition to the strong waist, the shoulder can also be pushed to move the occupant P closer to the center of the passenger compartment. In addition, since the second airbag 22 is formed as a space corresponding to the chest and abdomen of the occupant P, the chest and abdomen of the occupant P having relatively low resistance when the second airbag 22 is deployed and inflated. It can suppress that an impact is given with respect to.

  (6) In the side airbag device 20 of the present embodiment, the second airbag 22 is connected to the lower end portion of the waist inflating portion 23 and the upper end portion of the shoulder inflating portion 24 together with the first airbag 21. On the other hand, a portion from the front end portion to the upper end portion in the waist inflating portion 23 and a portion from the front end portion to the lower end portion in the shoulder inflating portion 24 are configured to be separable from the first airbag 21. Since the upper and lower ends of the second airbag 22 are connected to the first airbag 21 in this way, there is no interference at the position where the airbags 21 and 22 are deployed and inflated. When seated in the seat 10 in a normal state, the second airbag 22 is deployed and inflated from the vehicle rear to the front together with the first airbag 21. Therefore, the occupant P can be moved closer to the center of the passenger compartment by the second airbag 22, and the occupant can be protected from the door D by the first airbag 21. Further, when the interfering object 50 is present at the position where the airbags 21 and 22 are deployed and inflated, the portion from the front end portion to the upper end portion of the waist inflation portion 23 of the second airbag 22 and the front end portion of the shoulder inflation portion 24. A portion that can be separated from the first airbag 21 including the portion from the lower end to the lower end can be deployed and inflated toward the center of the passenger compartment.

  (7) In the side airbag device 20 of the present embodiment, a portion corresponding to the chest portion of the occupant P from the chest portion of the first airbag 21 to the abdomen is regulated by the regulation seam 28. Therefore, it is possible to suppress an impact from being applied to the chest and abdomen of the occupant P, which are relatively weak when the first airbag 21 is deployed and inflated.

In addition, you may change the said embodiment suitably as follows.
In the above embodiment, the length from the rear end portion of the first airbag 21 to the front end portion of the second airbag 22 is about 70% based on the length S1 of the first airbag 21 in the front-rear direction. It is said that it is preferable to set it to 50 to 90% especially. However, the second airbag is not limited to such a range, and the front end of the second airbag only needs to be located behind the front end of the first airbag 21 in the deployed state.

  In each of the above embodiments, the amount of gas discharged from the inflator 30 to be supplied to each airbag 21, 22 per unit time is more to the first airbag 21 than the supply amount to the second airbag 22. However, the amount of gas supplied from the inflator 30 to each airbag per unit time may be the same.

  -In the side airbag device 20 of each said embodiment, the 1st airbag 21 and the 2nd airbag 22 are connected in the site | part of back side, Furthermore, in the site | part mutually connected, the bag inside is mutually mutually The airbags 21 and 22 do not need to communicate with each other inside the bag. In this case, it is only necessary to provide an inflator for supplying gas into each of the two airbags. Thus, by providing an inflator corresponding to each airbag, It is possible to easily change the timing of deployment and inflation as appropriate or change the internal pressure for each airbag. Further, the side airbag device 20 may not be connected at a portion near the rear thereof.

  -In the side airbag apparatus 20 of each said embodiment, the 1st airbag 21 expand | deploys corresponding to a waist | hip | lumbar part from a passenger | crew's shoulder part, and respond | corresponds from a passenger | crew's chest to abdomen in the same 1st airbag 21. The expansion of the part is regulated by the regulation seam 28. However, in the first airbag 21, a tether may be provided inside the first airbag 21 instead of the regulation seam 28 as a regulating means for regulating the expansion of the portion corresponding to the occupant's chest to the abdomen. Good. Further, the first airbag 21 may have a configuration in which such a restriction means is not provided. Furthermore, the 1st airbag should just be formed in the shape which expand | deploys corresponding to the body part including at least a passenger | crew's waist | hip | lumbar part. In particular, some doors constituting the side walls of the passenger compartment have a shape in which a lower portion corresponding to the occupant's waist protrudes toward the center of the passenger compartment. Therefore, when protecting an occupant from this type of door, the first airbag may be deployed and inflated corresponding only to the occupant's waist. Moreover, in each said embodiment, although the compartment side wall was used as the door D, a compartment side wall etc. may be sufficient as a compartment side wall, and the shape of the 1st airbag 21 is suitably set corresponding to a compartment side wall. You may do it.

  -In the side airbag apparatus 20 of each said embodiment, while the 2nd airbag 22 is provided with the shoulder expansion part 24 corresponding to a passenger | crew's shoulder part, between the waist expansion part 23 and the shoulder expansion part 24 is used as space. Is formed. In the second airbag 22, the lower end portion of the waist inflation portion 23 and the upper end portion of the shoulder inflation portion 24 are connected to the first airbag 21. However, the second airbag 22 may be configured such that the lower end portion of the waist inflation portion 23 and the upper end portion of the shoulder inflation portion 24 are not connected to the first airbag 21. In such a configuration, when there is an interfering object at a position where the first and second airbags are deployed and inflated, the second airbag is more directed toward the center of the vehicle compartment than the first airbag. Easy to deploy. Moreover, the 2nd airbag may be the structure provided with only a waist expansion part, without providing a shoulder expansion part. In this case, the lower end of the waist inflation portion 23 of the second airbag may be connected to the first airbag 21 or may be configured to be separable. Further, the second airbag may include an inflating portion between the shoulder inflating portion and the waist inflating portion. For example, the second airbag is configured to be deployed and inflated corresponding to the entire area from the shoulder to the waist of the occupant. Also good.

  In each of the above embodiments, the side airbag device 20 is built in the backrest portion 13 of the vehicle seat 10 so that the two airbags 21 and 22 are deployed and inflated from the front surface of the backrest portion 13 toward the front. Yes. However, the side airbag device 20 may be configured to expand and expand forward from the side surface of the backrest 13 on the side wall of the passenger compartment, or may be incorporated in components other than the backrest 13.

The side airbag apparatus concerning one Embodiment of this invention WHEREIN: A side view which shows the state which two airbags expand | deployed and expanded when the passenger | crew is seating in the normal state on the vehicle seat. In the side airbag apparatus concerning the embodiment, (a) is a cross-sectional view of two airbags, (b) is a side view showing a deployed state of two airbags. The side airbag apparatus concerning the embodiment WHEREIN: (a), (b), (c) and (d) are the figures which show the state of the two airbags in each manufacturing process. (A) is sectional drawing in the AA line of FIG. 1, (b) is sectional drawing in the BB line of FIG. The side view which shows the state which two airbags expand | deployed in the side airbag apparatus concerning the embodiment, when an interference object exists in the position where an airbag expand | deploys. (A) is sectional drawing in the AA line of FIG. 5, (b) is sectional drawing in the BB line of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Seat, 11 ... Slide rail, 12 ... Seat part, 13 ... Backrest part, 14 ... Headrest, 20 ... Side airbag apparatus, 21 ... First airbag, 22 ... Second airbag, 23 ... Waist inflation Part 24, shoulder expansion part, 25 intermediate part, 28 regulating seam, 30 inflator, 41 outer panel, 42 inner panel, 50 interference.

Claims (8)

A side airbag device having a first airbag and a second airbag that are deployed and inflated from the rear to the front of the vehicle side by side in the vehicle width direction between the occupant and the side wall of the passenger compartment when the vehicle collides. And
The first airbag is deployed and inflated corresponding to a body part including at least a waist part of an occupant,
The second airbag includes a waist inflating portion corresponding to a waist portion of an occupant, and at least a front end portion of the second airbag is configured to be separable from the first airbag, so that the width direction of the vehicle is greater than that of the first airbag. In which the front end portion in the deployed state is set to be located behind the front end portion in the deployed state of the first airbag. Airbag device. In claim 1,
In the deployed state of each of the first and second airbags, the length from the rear end portion of the first airbag to the front end portion of the second airbag is the rear end of the first airbag. The side airbag device is set so as to be 50 to 90% of the length from the front portion to the front end portion. In claim 1 or 2,
The side airbag device, wherein the first airbag and the second airbag are connected to each other at a rear portion. In claim 3,
The side airbag device according to claim 1, wherein the first airbag and the second airbag are communicated with each other at a portion where the first airbag and the second airbag are connected to each other. In any one of Claims 1-4,
The side airbag device according to claim 1, wherein the first airbag is deployed and inflated from the shoulder portion of the occupant to the waist portion. In claim 5,
The second airbag includes a shoulder inflating portion corresponding to a shoulder portion of an occupant, and is formed as a space between the waist inflating portion and the shoulder inflating portion. . In claim 6,
The second airbag has a lower end portion of the waist inflation portion and an upper end portion of the shoulder inflation portion connected to the first airbag, and a portion from the front end portion to the upper end portion of the waist inflation portion. The side airbag apparatus characterized by the part from the front-end part to a lower end part in the said shoulder expansion part being separable from a 1st airbag. In any one of Claims 5-7,
The side airbag apparatus characterized by including the control means which controls the expansion | swelling in the site | part corresponding to a passenger | crew's chest from the chest in the 1st airbag.

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