JP2011051414A - Side airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a side airbag device for surely protecting the collision of an occupant with a side door during collision by enabling stable inflation and development even when installed on a small vehicle. <P>SOLUTION: The side airbag device 200 is provided on the side wall of a seat (a seat cushion device 110) in a vehicle 100 for inflating and developing between the seat and the side door 102. It includes a first airbag 212 for inflating and developing from a shoulder Ps of the seat, and a second airbag 214 for inflating and developing from the side wall of the first airbag while overlapping with all or part of the first airbag. The first airbag completes inflation and development prior to the second airbag, and its horizontal cross section after the inflation and development is tapered forward. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention provides a side airbag that is provided on a side wall of a seat back of a seat cushion device (seat) in a vehicle and that inflates and deploys between a seat and a side door at the time of a vehicle side collision or rollover (rollover). The present invention relates to a side airbag device having the same.

  At the time of a side collision or rollover (rollover) of the vehicle, the occupant moves in the direction of the side collision due to inertia. At this time, in order to protect the occupant from a collision with a vehicle interior side wall (hereinafter referred to as a side door), the vehicle is provided with a side airbag device having a side airbag. Thereby, at the time of a side collision or rollover, the side airbag is inflated and deployed between the occupant and the side door, and the occupant is protected from a collision with the side door.

  Although the side airbag device is mainly installed inside the side door, in recent years, the one installed inside the seat back of the seat cushion device (seat) is also widely used. As a result, even if the occupant moves the seat cushion device back and forth or up and down, the side airbag device also moves together and the positional relationship with the occupant does not change, so that the occupant can be more reliably protected. .

  As a side airbag device installed inside the above seat back, for example, Patent Literature 1 discloses a first inflating and inflating corresponding to a body part including at least a waist portion of a passenger between a passenger and a passenger compartment side surface. A side airbag and a second side airbag that is inflated and deployed corresponding to the waist of the occupant between the side airbag and the passenger compartment side surface or between the first side airbag and the occupant. A side airbag device is disclosed. According to this, it is possible to effectively protect the occupant's body part, particularly the waist, at the time of a side collision from another vehicle.

JP 2004-330925 A

  As described above, the occupant moves in the direction of the side collision due to inertia during a side collision. For example, assuming that an occupant is seated in the driver's seat, when the vehicle receives a side collision from another vehicle on the driver's seat side, the occupant seated in the driver's seat is in a state where the upper body is shaken by inertia. Move to the side. At this time, even if the second airbag described in Patent Document 1 is inflated and deployed, the force acting only on the waist cannot prevent the upper body of the occupant from moving. Therefore, in such a case, the passenger | crew protection performance of the side airbag apparatus of patent document 1 is comparable as the conventional side airbag, and still has a subject.

  Another problem of the side airbag device is a lack of deployment allowance space when installed in a vehicle having a displacement of 1500 cc or less (hereinafter referred to as a small vehicle or the like) such as a small car or a light car. Specifically, a small vehicle or the like has an absolute small vehicle width because the entire vehicle is smaller than an ordinary vehicle or a large vehicle. For this reason, the space | interval of a passenger | crew and a side door is narrow, and the space (allowable space dimension for expansion | deployment deployment) required for the inflation deployment of the side airbag at the time of side collision occurrence was very narrow. Therefore, side airbags installed in small vehicles and the like are more difficult to inflate and deploy than side airbags installed in ordinary vehicles and large vehicles, and improvement of the stability of inflation and deployment has been an issue.

  In view of such a problem, the present invention reliably protects an occupant from a collision with a side door at the time of a side collision, and can be stably inflated and deployed even when installed in a small vehicle or the like. The object is to provide a device.

  In order to solve the above problems, a typical configuration of a side airbag device according to the present invention is a side airbag device that is provided on a side wall side of a seat in a vehicle and inflates and deploys between the seat and the side door. A first airbag that is inflated and deployed with respect to the shoulder portion of the seat, and a second airbag that is inflated and deployed on the side wall side of the first airbag, overlapping with part or all of the first airbag; The first airbag is inflated and deployed before the second airbag, and the horizontal section after the inflation and deployment is tapered forward.

  The narrowest space between the occupant and the side door is the shoulder protruding from the occupant's body to the side door (side wall). According to the above configuration, the first airbag that inflates and deploys with respect to the shoulder portion is tapered forward, so that it can easily enter the narrow space beside the shoulder portion and be inflated and deployed. And since the passenger | crew's shoulder part is pushed and moves to a vehicle center direction by the 1st airbag which the expansion | deployment deployment was completed, the space between a passenger | crew and a side door can be expanded. Thereby, the 2nd airbag which protects a passenger | crew's side as a whole can be stably inflated and deployed.

  In addition, when the first airbag is inflated and deployed with respect to the shoulder portion, the force for moving the occupant's upper body, which moves to the side door side due to inertia at the time of a side collision, to the opposite side (vehicle center side) directly. Can be added to. Therefore, movement of the occupant toward the side door can be suppressed, and the occupant can be more reliably protected from collision with the side door.

  In order to solve the above problems, another configuration of the side airbag device according to the present invention is a side airbag device that is provided on a side wall side of a seat in a vehicle and inflates and deploys between the seat and the side door. A first airbag that inflates and deploys with respect to the shoulder portion of the seat, and a second airbag that inflates and deploys in front of the first airbag, the first airbag being ahead of the second airbag. The inflated deployment is completed, and the horizontal cross section after the inflated deployment is tapered forward.

  Even with such a configuration, the first airbag that is inflated and deployed with respect to the shoulder portion and has a tapered front portion is provided, so that the same advantage as the above-described side airbag device can be obtained. Further, since the second airbag is inflated and deployed in front of the first airbag, the first airbag does not hinder the inflation and deployment of the second airbag.

  The volume of the first airbag is preferably smaller than the volume of the second airbag. With this configuration, the first airbag can be inflated and deployed before the second airbag is inflated and deployed.

  The side airbag device includes a first inflator that supplies gas to the first airbag, a second inflator that supplies gas to the second airbag, and a control unit that controls operations of the first and second inflators. It is good to further comprise.

  According to the above configuration, the gas is supplied to the first airbag by the first inflator and the second airbag to the second inflator, so that these airbags can be reliably inflated and deployed. In addition, by providing one inflator for one airbag, only one of the first airbag and the second airbag can be inflated and deployed.

  Said control part is good to operate a 2nd inflator simultaneously with operating a 1st inflator after operating a 1st inflator. According to such a configuration, the first airbag can be reliably inflated and deployed before the second airbag.

  The side airbag device may further include a communication hole provided in a connection surface between the first airbag and the second airbag, and an inflator that supplies gas to the first airbag.

  According to the above configuration, the gas supplied from the inflator to the first airbag is also supplied to the second airbag through the communication hole. Therefore, since gas can be supplied to two airbags by one inflator, there is no need to provide an inflator for each airbag. Thereby, the cost required for the side airbag device can be reduced, and the installation space can be narrowed.

  According to the present invention, there is provided a side airbag device that reliably protects an occupant from a collision with a side door during a side collision and that can be stably inflated and deployed even when installed in a small vehicle or the like. Is possible.

It is the schematic which illustrates the position where the side airbag apparatus concerning this invention is arrange | positioned. It is the schematic which illustrates the side airbag apparatus concerning 1st Embodiment. It is a figure which shows the expansion | deployment state of the side airbag apparatus concerning 1st Embodiment. It is the schematic which illustrates the side airbag apparatus concerning 2nd Embodiment and 3rd Embodiment. It is the schematic which illustrates the side airbag apparatus concerning 4th Embodiment. It is a figure which shows the expansion | deployment state of the side airbag apparatus concerning 4th Embodiment. It is a figure which compares the thickness of embodiment of this invention and a comparative example, and illustrates the position of the partition of embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a schematic view illustrating a position where a side airbag device according to the present invention is disposed. In addition, although illustration is abbreviate | omitted in FIG. 1, the structure by the side of a passenger seat is also the same. In the following description, the vehicle traveling direction is referred to as “front”, the opposite direction as “rear”, the vertical upward direction as “up”, and the vertical downward direction as “down”.

  As illustrated in FIG. 1, the seat cushion device 110 that is a seat provided in the vehicle 100 includes a seat cushion 112, a seat back 114, and a headrest 116. The side airbag device 200 is adjacent to the side door 102 side (side wall side) of the seat back 114 and the shoulder Ps of the occupant P in a state of being incorporated in the seat frame 118 (see FIG. 2) inside the seat back 114. Buried in position. In addition, in FIG. 1, although the position of the side airbag apparatus 200 of 1st Embodiment is illustrated as a representative, this is common to all embodiment of this application.

  When the vehicle 100 is a small vehicle or the like, the absolute vehicle width is smaller than that of a normal vehicle or a large vehicle. For this reason, the space | interval of the passenger | crew P and the side door 102 was narrow, and the space required for the inflation and deployment of the side airbag at the time of side collision occurrence was very narrow. Therefore, a side airbag installed in a small vehicle or the like has a problem that it is more difficult to inflate and deploy than a side airbag installed in a normal vehicle or a large vehicle. Therefore, in the following embodiment, a side airbag device that can be stably inflated and deployed even when installed in a vehicle 100 such as a small car will be described in detail.

(First embodiment)
FIG. 2 is a schematic view illustrating the side airbag device according to the first embodiment. 2A is a perspective view of the side airbag device 200, and FIG. 2B is a top view. For easy understanding, FIG. 2 shows the side airbag device after inflating and deploying.

  As illustrated in FIG. 2B, the side airbag device 200 includes a case 202, a first airbag 212, a second airbag 214, a first inflator 222, a second inflator 224, and a control unit. 230.

  The case 202 is a member that accommodates a member constituting the side airbag device 200 and is incorporated in the seat frame 118. The vehicle 100 side wall side (side door 102 side) of the case 202 is covered with a cushion material and a skin material (both not shown) inside the seat back 114. The skin material and the cushion material may be provided with seams and tear lines at the time of sewing at positions where the first airbag 212 and the second airbag 214 are cleaved when inflated and deployed. As a result, the skin material and the cushion material are easily cleaved, and the first airbag 212 and the second airbag 214 can be easily inflated and deployed outside the seat back 114.

  The first airbag 212 is an airbag that is inflated and deployed to the shoulder Ps of the occupant P by the inflation gas supplied from the first inflator 222. The first airbag 212 is completely inflated and deployed before the second airbag 214, and the distal end portion 212a is tapered. More specifically, the horizontal cross section after the expansion and deployment is tapered forward. Thereby, in the space A (refer FIG. 3 (a)) between the shoulder Ps of the passenger | crew P and the side door 102 which is the narrowest among the narrow spaces between the passenger | crew P and the side door 102 in the vehicle 100, The first airbag 212 can easily enter and inflate and deploy. Since the occupant P moves in the center direction of the vehicle 100 by the shoulder Ps being pushed by the first airbag 212 after being inflated and deployed, the space between the occupant P and the side door 102 can be enlarged.

  Further, at this time, a force for moving the occupant P to the opposite side, that is, the center side of the vehicle 100 can be directly applied. Thereby, the movement of the occupant toward the side door 102 at the time of a side collision can be suppressed, and the occupant P can be more reliably protected from the collision with the side door 102.

  The volume of the first airbag 212 is smaller than the volume of the second airbag 214. Thereby, the inflation and deployment of the first airbag 212 can be completed before the inflation and deployment of the second airbag 214. Specifically, the volume of the first airbag 212 is preferably about ¼ to about 1-2 of the volume of the second airbag 214. The volume of each airbag can be suitably adjusted by providing an exhaust port in the airbag and adjusting the size and number of the exhaust ports.

  In the present embodiment, the order of completing the inflation and deployment is controlled by adjusting the volumes of the first airbag 212 and the second airbag 214, but the present invention is not limited to this. As another method, for example, it is possible to control the order of expansion and expansion completion by changing the output of the expansion gas amount of the first inflator 222 and the second inflator 224. Moreover, you may combine these methods.

  The second airbag 214 is inflated and deployed on the side door 102 side of the first airbag 212 overlapping the entire first airbag 212 by the inflation gas supplied from the second inflator 224. With this configuration, the side portion of the occupant P can be protected in a wider range than the first airbag 212. For example, in the case of the second airbag 214 according to this embodiment, the side walls of the occupant's chest, abdomen, waist, and the like are protected.

  The second airbag 214 starts inflating and deploying while the first airbag 212 is inflated and deployed, and completes inflating and deploying after the first airbag 212 is inflated and deployed. As a result, the second airbag 214 can be easily inflated and deployed in the space between the occupant P and the side door 102, which is enlarged because the first airbag 212 has pushed the occupant P toward the center of the vehicle 100. . Therefore, the stability of expansion and deployment is improved.

  In the present embodiment, the second airbag 214 is configured to be inflated and deployed in an overlapping manner with the entire first airbag 212 (all), but the present invention is not limited to this. It is good also as a structure which expands and expands overlapping with a part. However, in order to further expand the protection range of the side of the occupant P (surface on the side door 102 side), the second airbag 214 is larger than the first airbag 212 as in the present embodiment, that is, It is preferable to inflate and deploy the entire airbag 212.

  The first inflator 222 and the second inflator 224 supply gas to the first airbag 212 and the second airbag 214, respectively. Thus, each airbag can be reliably inflated and deployed by the configuration including one inflator for each of the plurality of airbags. Moreover, according to the said structure, it becomes possible to operate only one of the 1st inflator 222 or the 2nd inflator 224, and to inflate and deploy only the airbag to which the operated inflator corresponds.

  The control unit 230 controls the operation of the first inflator 222 and the second inflator 224. The controller 230 is embedded in the vehicle 100 and cannot be observed from the outside, but is illustrated for convenience of explanation.

  The control unit 230 operates the second inflator 224 after operating the first inflator 222. Thereby, the completion of inflation and deployment of the second airbag 214 can be surely delayed as compared with the first airbag 212. Note that the controller 230 may operate the second inflator 224 at the same time as operating the first inflator 222. If the capacity of the first airbag 212 is smaller than that of the second airbag 214 as in this embodiment, the first airbag 212 completes inflating and deploying earlier even if both are operated simultaneously. is there.

  The control unit 230 can also operate only one of the first inflator 222 and the second inflator 224 according to, for example, the strength of the collision. For example, when the collision waveform due to a side collision of the vehicle 100 is small (the speed at the time of the collision is low), it is possible to perform control such as operating only the first inflator 222.

  Next, the inflation and deployment of the side airbag device 200 according to the first embodiment will be described. FIG. 3 is a view showing a deployed state of the side airbag device 200 according to the first embodiment. 3A shows a state before the side airbag device 200 is inflated and deployed, and FIG. 3B shows a state during the inflation and deployment of the side airbag device 200. FIG. Thereafter, the state shown in FIG.

  As shown in FIG. 3A, the side airbag device 200 before inflating and deploying includes a folded first airbag 212 and second airbag 214, first inflator 222 and second inflator 224 in the case 202. In the accommodated state, it is incorporated in the seat frame 118 inside the seat back 114. And as shown by the arrow in a figure, the space A between the side door 102 and the passenger | crew's P shoulder part Ps is a state with a very narrow width | variety.

  When a side collision of the vehicle 100 occurs, the first inflator 222 is operated by the control unit 230. When the inflation gas is supplied from the first inflator 222, the first airbag 212 is inflated and deployed. When this inflation and deployment is completed, the side airbag device 200 is in the state shown in FIG. At this time, the first airbag 212 can be easily inflated and deployed in a narrow space A between the shoulder portion Ps of the occupant P because the tip end portion 212a is tapered. As apparent from FIG. 3, the second airbag 214 is connected to the surface of the first airbag 212 on the side door 102 side, so that the seat simultaneously with the expansion and deployment of the first airbag 212. Advances outside the back 114.

  Next, the control unit 230 operates the second inflator 224. When the inflation gas is supplied from the second inflator 224, the second airbag 214 is inflated and deployed. When this inflation and deployment is completed, the side airbag device 200 is in the state shown in FIG. 2B, and the occupant P can be reliably protected from collision with the side door 102. At this time, since the space in which the second airbag 214 is inflated and deployed is secured by the first airbag 212 that has already been inflated and deployed, the second airbag 214 can be stably inflated and deployed.

  The effects of the first embodiment are summarized as follows. 1) Since the first airbag 212 that is first inflated and deployed is tapered, it can be inflated and deployed in a narrow space A. 2) Since the first airbag 212 presses the shoulder Ps of the occupant P, the space A can be expanded. 3) Since there is a time difference in deployment, the second airbag 214 can be easily deployed in an enlarged space. 4) The passenger P is prevented from colliding with the side door 102. These effects 1) to 4) are obtained in common with all other embodiments of the present invention.

  Next, a second embodiment and a third embodiment of the present invention will be described. FIG. 4 is a schematic view illustrating a side airbag device according to the second embodiment and the third embodiment. FIG. 4A is a top view of the side airbag device according to the second embodiment, and FIG. 4B is a top view of the side airbag device according to the third embodiment.

(Second Embodiment)
The side airbag device 300 according to the second embodiment is different from the side airbag device 200 in that a plurality of airbags are communicated with each other through communication holes and only one inflator is provided.

  As illustrated in FIG. 4A, the side airbag device 300 is characterized by a first airbag 312, a second airbag 314, a communication hole 316, and a control unit 330.

  The first airbag 312 is inflated and deployed on the shoulder Ps of the occupant P by the inflation gas supplied from the first inflator 222. Also in the first airbag 312, the tip portion 312a is tapered. The volume of the first airbag 312 is smaller than the volume of the second airbag 314. Thereby, the same operation effects 1) to 4) as those of the first airbag 212 can be obtained.

  The second airbag 314 is inflated and deployed on the side of the side door 102 by the inflation gas supplied from the first inflator 222 through a communication hole 316 described later. Thereby, the side part of the passenger | crew P can be protected in the range wider than the 1st airbag 312. FIG. Note that the second airbag 314 may be configured to inflate and deploy partially overlapping with the first airbag 312.

  The first airbag 312 and the second airbag 314 are sewn (connected) in the vicinity of the tip of the first airbag 312. Accordingly, when the first airbag 312 is inflated and deployed, the second airbag 314 in a deflated state (small volume) before the inflation and deployment can be led out between the occupant P and the side wall side (side door side 102). it can. Therefore, the second airbag 314 can be easily inflated and deployed between the occupant and the side wall.

  The communication hole 316 is provided on a connection surface (overlapping portion) between the first airbag 312 and the second airbag 314, and causes the inflation gas supplied to the first airbag 312 to flow through the second airbag 314. As a result, the gas can be supplied to both the first airbag 312 and the second airbag 314 only by the first inflator 222, thereby reducing the cost of the side airbag device 300 and reducing the installation space. can do.

  In the present embodiment, the communication hole 316 is provided in the vicinity of the distal end portion 312 a of the first airbag 312. As a result, the inflation gas from the first inflator 222 is supplied to the second airbag 314 after the first airbag 312 is inflated and deployed.

  In addition, according to the above configuration, since the first airbag 312 and the second airbag 314 are integrated, when the first airbag 312 moves out of the seat back 114 when inflated and deployed, the second airbag is associated therewith. 314 also advances outside the seat back 114. Therefore, the expansion and deployment of the second airbag 314 can be made easier.

  Next, the inflation and deployment of the side airbag device 300 according to the second embodiment will be described. The side airbag device 300 before inflating and deploying is accommodated in the seat back 114 in a state where the folded first airbag 312, second airbag 314, and first inflator 222 are accommodated in the case 202. . When a side collision of the vehicle 100 occurs, the first inflator 222 is operated by the control unit 330. When the inflation gas is supplied from the first inflator 222, the first airbag 212 is inflated and deployed.

  After the first airbag 312 is inflated and deployed, the gas supplied from the first inflator 222 passes through the first airbag 312 and is supplied to the second airbag 314 through the communication hole 316. As a result, the second airbag 314 is inflated and deployed to the state shown in FIG. 4A, and the occupant P can be reliably protected from collision with the side door 102. Therefore, the side airbag device 300 according to the second embodiment also secures a space for the second airbag 314 to be inflated and deployed by the first airbag 312 that has been previously inflated and deployed, and the second airbag 314 is stable. Thus, it can be expanded and deployed.

(Third embodiment)
The side airbag device 400 according to the third embodiment differs from the side airbag device 300 of the second embodiment in the position of the communication hole. As illustrated in FIG. 4B, the side airbag device 400 is characterized by a first airbag 412, a second airbag 414, and a communication hole 416.

  The communication hole 416 is provided in the vicinity of the case 202 on the connection surface (overlapping portion) between the first airbag 412 and the second airbag 414. Although the communication hole 416 is different in position from the communication hole 316, the function is the same, and the inflation gas supplied to the first airbag 412 is circulated to the second airbag 414. Also with such a configuration, the inflation gas from the first inflator 222 is supplied to the second airbag 314 after the first airbag 312 is inflated and deployed. Therefore, the same effects 1) to 4) as those of the first airbag 212 can be obtained.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described. In the side airbag device 200 according to the first embodiment, the first airbag 212 and the second airbag 214 are arranged adjacent to each other in the vehicle width direction of the vehicle 100, whereas according to the fourth embodiment. In the side airbag device, the first airbag and the second airbag are arranged adjacent to each other in the vehicle length direction.

  FIG. 5 is a schematic view illustrating a side airbag device 500 according to the fourth embodiment. FIG. 5A is a perspective view of the side airbag device 500, and FIG. 5B is a top view. For easy understanding, FIG. 5 also shows the side airbag device after inflating and deploying. As illustrated in FIG. 5, the features of the side airbag device 500 according to the fourth embodiment are a first airbag 512 and a second airbag 514.

  The first airbag 512 is inflated and deployed on the shoulder Ps of the occupant P by the inflation gas supplied from the first inflator 222. Also in the present embodiment, the first airbag 512 is inflated and deployed before the second airbag 514, and the distal end portion 512a is tapered. Thereby, the same operation effects 1) to 4) as the first airbag 212 of the first embodiment can be obtained.

  The volume of the first airbag 512 is smaller than the volume of the second airbag 514. Thereby, the first airbag 512 can be inflated and deployed before the second airbag 214. Note that the order of completing the inflation and deployment of the first airbag 512 and the second airbag 514 is not necessarily controlled by the capacity, but is controlled by the output of the inflation gas amount of the first inflator 222 and the second inflator 224. May be.

  The second airbag 514 is covered with the inflated gas supplied from the second inflator 224 so that the first airbag 512 is inflated and deployed in front of the first airbag 512 (in the side wall (side door 102) of the vehicle 100). Inflate and deploy in areas other than Thereby, the side part of the passenger | crew P of the range wider than the 1st airbag 512, for example, side walls, such as a chest part, an abdominal part, and a waist | hip | lumbar part, can be protected. Further, according to the above configuration, since the region where the first airbag is inflated and deployed is different from the region where the second airbag is inflated and deployed, the first airbag does not hinder the inflation and deployment of the second airbag.

  In the present embodiment, the first inflator 222 and the second inflator 224 are juxtaposed in the vertical direction. With this configuration, it is possible to suitably inflate and deploy the first airbag and the second airbag.

  Next, the inflation and deployment of the side airbag device 500 according to the fourth embodiment will be described. FIGS. 6A and 6B are views showing a deployed state of the side airbag device 500 according to the fourth embodiment. FIG. 6A shows a state before the inflation and deployment, and FIG. 6B shows a state during the inflation and deployment. ing.

  As shown in FIG. 6A, the side airbag device 200 is in a state in which the folded first airbag 512 and second airbag 514, the first inflator 222 and the second inflator 224 are accommodated in the case 202. Thus, it is incorporated in the seat frame 118 inside the seat back 114.

  When a side collision of the vehicle 100 occurs, the first inflator 222 is operated by the control unit 230, and the first airbag is inflated and deployed by the inflation gas supplied from the first inflator 222. When the inflation and deployment of the first airbag is completed, the side airbag device 200 is in the state shown in FIG. After operating the first inflator 222, the control unit operates the second inflator 224. Then, the second airbag 514 is inflated and deployed by the inflation gas supplied from the second inflator 224, and finally enters the state shown in FIG. Thereby, a passenger | crew's side part is protected in a wider range.

  Next, a fifth embodiment and a sixth embodiment of the present invention will be described. FIG. 7 is a schematic view illustrating a side airbag device according to the fifth embodiment and the sixth embodiment. Fig.7 (a) is a perspective view of the side airbag apparatus concerning 5th Embodiment, FIG.7 (b) is a perspective view of the side airbag apparatus concerning 5th Embodiment. For ease of understanding, FIG. 7 shows the side airbag device after inflating and deploying.

(Fifth embodiment)
The side airbag device 600 according to the fifth embodiment is different from the side airbag device 500 in that a plurality of airbags are communicated with each other through communication holes and only one inflator is provided. As illustrated in FIG. 7A, the side airbag device 600 according to the fifth embodiment is characterized by a first airbag 612, a second airbag 614, and a communication hole 616.

  The first airbag 612 is inflated and deployed to the shoulder Ps of the occupant P by the inflation gas supplied from the first inflator 222. Also in the first airbag 612, the tip end portion 612a is tapered. Therefore, the same effects 1) to 4) as those of the first airbag 212 can be obtained.

  The communication hole 616 is provided below the connection surface between the first airbag 612 and the second airbag 614. The second airbag 614 is inflated and deployed in front of the first airbag 612 by the inflation gas supplied from the first inflator 222 through the communication hole 616. Thereby, the side part of passenger | crew P can be protected in the range wider than the 1st airbag 612. FIG.

  Next, the inflation and deployment of the side airbag device 600 according to the fifth embodiment will be described. The side airbag device 600 is incorporated in the seat frame 118 inside the seat back 114 in a state where the folded first airbag 612, second airbag 614, and first inflator 222 are accommodated in the case 202. . When a side collision of the vehicle 100 occurs, the first inflator 222 is operated by the control unit 330, and the first airbag is inflated and deployed by the inflation gas supplied from the first inflator 222. At this time, since the front end portion 612a of the first airbag 612 is tapered, it can be easily inflated and deployed in a narrow space between the shoulder portion Ps of the occupant P.

  After the first airbag 612 is inflated and deployed, the gas supplied from the first inflator 222 passes through the first airbag 612 and is supplied to the second airbag 614 through the communication hole 616. As a result, the second airbag 614 is inflated and deployed to the state shown in FIG. 7A, and the occupant P can be reliably protected from collision with the side door 102.

(Sixth embodiment)
The side airbag device 700 according to the sixth embodiment differs from the side airbag device 600 in the position of the communication hole. As illustrated in FIG. 7B, the side airbag device 700 is characterized by a first airbag 712, a second airbag 714, and a communication hole 716.

  The communication hole 716 is provided in the vicinity of the front end portion 712a of the first airbag on the connection surface of the first airbag 412 and the second airbag 414, and the inflation gas supplied to the first airbag 712 is supplied to the second airbag 712. Distribute to bag 714. Also with such a configuration, the same effects 1) to 4) as those of the first airbag 212 can be obtained.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the embodiments described above are preferred examples of the present invention, and other embodiments can be implemented by various methods. Can be carried out. The invention is not limited to the detailed shape, size, configuration, and the like of the components shown in the accompanying drawings unless otherwise specified in the present specification. In addition, expressions and terms used in the present specification are for the purpose of explanation, and are not limited thereto unless otherwise specified.

  Therefore, it is obvious for those skilled in the art that various changes and modifications can be conceived within the scope of the claims, and these naturally belong to the technical scope of the present invention. It is understood. For example, all of the side airbag devices according to the embodiments of the present invention are applied to the front seat (driver's seat, front passenger seat), but can of course be applied to the rear seat.

  The present invention provides a side airbag that is provided on a side wall of a seat back of a seat cushion device (seat) in a vehicle and that inflates and deploys between a seat and a side door at the time of a vehicle side collision or rollover (rollover). It can utilize for the side airbag apparatus which has.

P: Crew, Ps ... Shoulder, 100 ... Vehicle, 102 ... Side door, 110 ... Seat cushion device, 112 ... Seat cushion, 114 ... Seat back, 116 ... Headrest, 118 ... Seat frame, 200 ... Side airbag device, 202 ... Case, 212 ... First airbag, 212a ... Tip, 214 ... Second airbag, 222 ... First inflator, 224 ... Second inflator, 230 ... Control part, 300 ... Side airbag device, 312 ... First DESCRIPTION OF SYMBOLS 1 airbag, 312a ... tip part, 314 ... 2nd airbag, 316 ... Communication hole, 330 ... Control part, 400 ... Side airbag apparatus, 412 ... 1st airbag, 414 ... 2nd airbag, 416 ... Communication Hole 500, side airbag device, 512 ... first airbag, 512a ... tip, 514 ... second Airbag, 600 ... side airbag apparatus, 612 ... first air bag, 614 ... second air bag, 616 ... communication hole, 712a ... tip

Claims (6)

A side airbag device provided on a side wall side of a seat in a vehicle and inflated and deployed between the seat and a side door,
A first airbag that inflates and deploys against the shoulder of the seat;
A second airbag that is inflated and deployed on the side wall of the first airbag, overlapping with part or all of the first airbag;
With
The side airbag device according to claim 1, wherein the first airbag has been inflated and deployed before the second airbag, and the horizontal section after the inflation and deployment is tapered forward. A side airbag device provided on a side wall side of a seat in a vehicle and inflated and deployed between the seat and a side door,
A first airbag that inflates and deploys against the shoulder of the seat;
A second airbag that inflates and deploys in front of the first airbag;
With
The side airbag device according to claim 1, wherein the first airbag has been inflated and deployed before the second airbag, and the horizontal section after the inflation and deployment is tapered forward.   The side airbag device according to claim 1 or 2, wherein the volume of the first airbag is smaller than the volume of the second airbag. The side airbag device is
A first inflator for supplying gas to the first airbag;
A second inflator for supplying gas to the second airbag;
A control unit for controlling the operation of the first inflator and the second inflator;
The side airbag device according to claim 1, further comprising:   5. The side airbag device according to claim 4, wherein the control unit operates the second inflator simultaneously with the operation of the first inflator or after the operation of the first inflator. The side airbag device is
A communication hole provided in a connection surface between the first airbag and the second airbag;
An inflator for supplying gas to the first airbag;
The side airbag device according to claim 1, further comprising:

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