JP2006088902A - Airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an airbag device, capable of favorably protecting an occupant on a rear seat regardless of variation of distance from the occupant on the rear seat to a front seat. <P>SOLUTION: This airbag device is provided with an airbag 32 to be inflated and developed between the front seat 10 and the rear seat 11 to protect the occupant P, and an auxiliary airbag 36 to be inflated and developed between the airbag 32 and the front seat 10. The airbag 32 and the auxiliary airbag 36 are inflated and developed by supply of gas from a first inflator 31 and a second inflator 35. The auxiliary airbag 36 is kept uninflated and undeveloped when the distance from the occupant P to the front seat 10 is close, and it is inflated and developed when the distance is far by development control processes by a control device 51. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an airbag device for protecting an occupant seated in a rear seat among a front seat and a rear seat arranged side by side in a vehicle front-rear direction in a vehicle interior.

Conventionally, as an airbag device, for example, Patent Document 1 proposes a safety device for protecting an occupant seated on a rear seat (rear seat). In this safety device, the airbag module is provided integrally with the seat base frame in the rear region (back portion) of the front seat (front seat). This safety device deploys an airbag from the airbag module upward along the back of the backrest portion of the front seat when an impact greater than a predetermined level is applied to the vehicle. Designed to spread in front of the chest or head. The inflated airbag is sandwiched between the backrest portion of the front seat and the occupant to protect and restrain the occupant, and the reaction force from the airbag generated during the protection and restraint is applied to the backrest of the front seat. By receiving at the part, the impact applied to the occupant is reduced.
Special Table 2002-542100 gazette

  However, in a general vehicle, at least one of a front seat and a rear seat can be slid in a vehicle compartment, and a backrest portion thereof can be tilted (reclining). When the slide operation or the reclining operation is performed on either the front seat or the rear seat, the distance from the occupant seated on the rear seat to the backrest portion of the front seat changes. On the other hand, the airbag device disclosed in Patent Document 1 always deploys and inflates the airbag with a constant size. For this reason, in the airbag device of Patent Document 1, when the distance from the occupant to the backrest portion of the front seat changes to such an extent that the reaction force from the airbag cannot be received by the backrest portion of the front seat, the occupant There was a problem that the protection performance against the deterioration.

  The present invention has been made paying attention to such problems existing in the prior art. The object is to provide an airbag device capable of suitably protecting an occupant seated in the rear seat regardless of a change in the distance from the occupant seated in the rear seat to the front seat. It is in.

  In order to achieve the above-described object, the invention of the airbag device according to claim 1 is a front-facing vehicle in which one of the airbag devices is arranged in parallel in the vehicle front-rear direction and is movable with respect to the other. An airbag that inflates and deploys between the seat and the rear seat and protects an occupant seated on the rear seat; an auxiliary airbag that inflates and deploys between the airbag and the front seat; and the airbag; Based on a gas generation source that supplies gas for inflating and deploying each of the auxiliary airbags, a distance from the occupant to the front seat, and a determination value for protecting the occupant only with the airbag, the distance is When the determination value is determined to exceed the determination value, the auxiliary airbag is inflated and deployed, and when it is determined that the distance is equal to or less than the determination value, the expansion control is prohibited. And summarized in that and means.

  According to said structure, the airbag apparatus of this invention is equipped with the auxiliary | assistant airbag which inflate-deploys between an airbag and a front seat, and the expansion | deployment control means which controls the expansion | deployment operation | movement of this auxiliary airbag. Yes. The auxiliary airbag is inflated and deployed between the airbag and the front seat when the deployment control means determines that the distance from the occupant to the front seat exceeds the judgment value for protecting the occupant with the airbag alone. Is done. At this time, since the airbag and the auxiliary airbag are inflated and deployed between the front seat and the rear seat, even if the distance from the occupant to the front seat is long, the reaction from the airbag The force can be suitably received at the front seat via the auxiliary airbag. On the other hand, when it is determined by the deployment control means that the distance from the occupant to the front seat is equal to or less than a determination value for protecting the occupant with only the airbag, the auxiliary airbag is prohibited from inflating and deploying. For this reason, when the distance from the occupant to the front seat is short enough to receive the reaction force from the airbag at the front seat, the two airbags and the auxiliary airbag are between the occupant and the front seat. Excessive expansion can be suppressed. Therefore, regardless of the change in the distance from the occupant in the rear seat to the front seat, it is possible to suitably protect the occupant in the rear seat.

The invention of the airbag device according to claim 2 is characterized in that, in the invention according to claim 1, the airbag device is provided in the front seat.
According to said structure, an airbag will be inflate-deployed toward the passenger | crew of a back seat from a front seat. For this reason, it becomes possible to suitably inflate and deploy the airbag on the front side of the vehicle with respect to the passenger in the rear seat.

  The invention of the airbag device according to claim 3 is the invention according to claim 1 or 2, wherein the airbag protects at least a head and a chest among each part constituting the occupant. It is a summary.

According to said structure, it becomes possible to protect suitably the head and chest which are important protection parts for a passenger with an airbag.
The invention of the airbag device according to claim 4 is the invention according to any one of claims 1 to 3, wherein the front seat is slidable in the front-rear direction of the vehicle in the vehicle interior. And a backrest portion that is tiltable in the front-rear direction of the vehicle with respect to the seat portion, and the deployment control means includes the front-rear position of the seat portion relative to the rear seat and the seat portion. The gist is to include monitoring means for monitoring a tilt angle of the backrest portion with respect to a portion, and to detect the distance based on the front-rear position and the tilt angle.

  According to the above configuration, in the front seat in which the slide movement and the backrest portion can be tilted (reclined), the deployment control means includes the monitoring means for monitoring the front-rear position with respect to the rear seat and the tilt angle of the backrest portion. Yes. For this reason, it is possible to respond quickly to changes in the front-rear position and the tilt angle in the front seat, and to suitably detect the distance from the occupant seated in the rear seat to the front seat.

  The invention of the airbag device according to claim 5 is the invention according to any one of claims 1 to 4, wherein the rear seat is slidable in the longitudinal direction of the vehicle in the vehicle interior. And a backrest portion that is tiltable in the vehicle front-rear direction with respect to the seat portion, and the deployment control means includes the front-rear position of the seat portion relative to the front seat and the seat The gist is to include monitoring means for monitoring a tilt angle of the backrest portion with respect to a portion, and to detect the distance based on the front-rear position and the tilt angle.

  According to the above configuration, in the rear seat in which the slide movement and the backrest portion can be tilted (reclined), the deployment control means includes the monitoring means for monitoring the front-rear position relative to the front seat and the tilt angle of the backrest portion. Yes. For this reason, it is possible to respond quickly to changes in the front-rear position and the tilt angle in the rear seat, and to suitably detect the distance from the occupant seated in the rear seat to the front seat.

  The invention of the airbag apparatus according to claim 6 is the invention according to any one of claims 1 to 5, wherein the gas generation source is configured to inflate and deploy the airbag. For this purpose, the gist includes a first inflator for supplying gas to the airbag and a second inflator for supplying gas to the auxiliary airbag for inflating and deploying the auxiliary airbag.

  According to the above configuration, by supplying gas from the first inflator and the second inflator to the airbag and the auxiliary airbag, it is possible to rapidly inflate and deploy the airbag and the auxiliary airbag, respectively.

  ADVANTAGE OF THE INVENTION According to this invention, the passenger | crew who seated in the back seat can be protected suitably irrespective of the change of the distance from the passenger | crew who seated in the back seat to the front seat.

  Hereinafter, an embodiment in which an airbag device according to the present invention is applied to a vehicle having two rows of front and rear seats will be described with reference to the drawings. In the following description, the traveling direction (forward direction) of the vehicle is described as the front (front of the vehicle), and the airbag is defined in the vertical direction and the front-rear direction based on the deployed and inflated state.

  FIG. 1 shows a front seat 10 and a rear seat 11 as a front seat and a rear seat arranged side by side in the vehicle front-rear direction in the vehicle interior. The front seat 10 includes a first seat portion 12 and a first backrest portion 13. The first seat 12 is attached to the floor 14 in the passenger compartment via a seat rail 15 and is configured to be slidable in the front-rear direction in the passenger compartment. The first backrest 13 is rotatably supported at the rear end of the first seat 12 via a first hinge 16 and is configured to be tiltable (reclining) with respect to the first seat 12. Yes.

  On the other hand, the rear seat 11 includes a second seat portion 17 and a second backrest portion 18. The second seat portion 17 is attached to a seat 19 provided on the floor surface 14 in the vehicle compartment via a seat rail (not shown), and is configured to be slidable in the front-rear direction in the vehicle interior. The second backrest portion 18 is rotatably supported at the rear end of the second seat portion 17 via the second hinge 20, and is configured to be reclining with respect to the second seat portion 17.

  In the front seat 10, a main case 21 is embedded in the rear end portion of the first seat portion 12, and a sub case 22 is embedded in the rear portion of the first backrest portion 13. The airbag device includes a main module 23 and a sub module 24. The main module 23 is accommodated in the main case 21 and is built in the front seat 10. The submodule 24 is housed in the subcase 22 and is housed in the front seat 10. Note that. Although only the front seat 10 disposed on the left side in the vehicle interior is shown in the drawing, it is assumed that the right front seat (not shown) is also equipped with the same main module and sub-module as an airbag device.

  As shown in FIG. 2A, the main module 23 includes a first inflator 31 that is a gas generation source, and a bag-like airbag 32 that is inflated and deployed by being filled with a gas generated from the first inflator 31. It has. The first inflator 31 and the airbag 32 are fixed to the main case 21 via bolts 34 provided on the first retainer 33. The main module 23 supplies the gas blown from the first inflator 31 to the inside of the airbag 32 when the vehicle is subjected to an impact of a predetermined value or more. It is inflated and deployed between the rear seats 11. Note that the airbag 32 is accommodated in the main case 21 in a folded state in which the airbag 32 is normally folded.

  As shown in FIG. 2B, the submodule 24 includes a second inflator 35 that is a gas generation source, and a bag-like auxiliary airbag 36 that is inflated and deployed by filling the gas generated from the second inflator 35. And. The second inflator 35 and the auxiliary airbag 36 are fixed to the sub case 22 via bolts 34 provided on the second retainer 37. The sub-module 24 ejects gas from the second inflator 35 as necessary when an impact of a predetermined value or more is applied to the vehicle, and supplies the gas into the auxiliary airbag 36, thereby The airbag 36 is inflated and deployed between the front seat 10 and the airbag 32. The auxiliary airbag 36 is accommodated in the subcase 22 in a folded state in which the auxiliary airbag 36 is normally folded.

  As shown in FIG. 1, the inflated airbag 32 has a three-dimensional shape that rides on the knee from below the knee of the occupant P seated on the rear seat 11, and covers the chest from below the knee on the front of the occupant P. Yes. The occupant P holds the inflated and deployed airbag 32 with his / her chest, so that the airbag 32 protects the range from below the knee to the head among the parts constituting the occupant P. The auxiliary airbag 36 that has been inflated and deployed has an elliptical spherical shape, and is sandwiched between the airbag 32 and the rear back surface of the first backrest portion 13. The reaction force from the airbag 32 generated during the protection of the occupant P is received by the rear back surface of the first backrest portion 13 of the front seat 10 via the auxiliary airbag 36. The occupant P is protected and restrained by restraining movement by the first backrest 13 receiving reaction force from the airbag 32 via the auxiliary airbag 36.

  The front seat 10 and the rear seat 11 are provided with sensors in order to detect a position by sliding movement and a tilt angle by reclining. That is, in the front seat 10, the first seat portion 12 is provided with a front seat position sensor 41 for detecting the sliding movement amount of the first seat portion 12 with respect to the seat rail 15. The first backrest 13 is provided with a front seat tilt angle sensor 42 for detecting the amount of tilting (reclining movement) of the first backrest 13 with respect to the first seat 12. On the other hand, in the rear seat 11, the second seat portion 17 is provided with a rear seat position sensor 43 for detecting the sliding movement amount of the second seat portion 17 with respect to the seat 19. The second backrest 18 is provided with a rear seat tilt angle sensor 44 for detecting the amount of reclining movement of the second backrest 18 relative to the second seat 17.

Next, the electrical configuration of the airbag apparatus will be described.
The airbag device includes a seating sensor 45 for detecting that the passenger P is seated on the rear seat 11. The airbag apparatus also includes an impact sensor 46 for detecting that an impact has been applied to the vehicle. Further, the airbag device includes a control device 51 for performing deployment control of the airbag 32 and the auxiliary airbag 36. Detection signals from the front seat position sensor 41, the front seat tilt angle sensor 42, the rear seat position sensor 43, the rear seat tilt angle sensor 44, the seating sensor 45, and the impact sensor 46 are input to the control device 51. In addition, the first inflator 31 and the second inflator 35 are electrically connected to the control device 51. And the control apparatus 51 operates the 1st inflator 31 and the 2nd inflator 35, and expands and deploys the airbag 32 and the auxiliary | assistant airbag 36, respectively.

  Next, distance monitoring processing in the airbag apparatus will be described below. In addition, the monitoring process implemented here comprises the monitoring means in the expansion | deployment control means of an airbag apparatus.

  When the presence of the occupant P is detected in the rear seat 11 by the seating sensor 45, the control device 51 performs a distance monitoring process to monitor the distance from the chest of the occupant P to the center of the first backrest portion 13 of the front seat 10. I do. That is, when the presence of the occupant P is detected, detection signals from the front seat position sensor 41, the front seat tilt angle sensor 42, the rear seat position sensor 43, and the rear seat tilt angle sensor 44 are input to the control device 51. . The control device 51 first calculates the distance between the first seat part 12 and the second seat part 17 (hereinafter referred to as the first distance) based on the detection results of the front seat position sensor 41 and the rear seat position sensor 43. Subsequently, the control device 51 determines the distance between the first backrest portion 13 and the second backrest portion 18 (hereinafter referred to as the second distance) from the detection result by the front seat tilt angle sensor 42 and the rear seat tilt angle sensor 44 and the first distance. Calculated). And the control apparatus 51 memorize | stores a 1st distance and a 2nd distance as a distance from the passenger | crew P to the front seat 10. FIG.

  In this monitoring process, the control device 51 constantly monitors the input of detection signals from the sensors 41 to 44 while the presence of the occupant P is detected. When the slide operation or the reclining operation is performed on at least one of the front seat 10 and the rear seat 11, the stored first distance and second distance are corrected based on the detection results from the sensors 41 to 44. To do.

Next, the deployment control process in the airbag apparatus will be described below. Note that the deployment control process performed here constitutes a deployment control means of the airbag device.
In the airbag apparatus, when the impact sensor 46 detects that an impact has been applied to the vehicle, the control device 51 performs a deployment control process to protect the occupant P. That is, the control device 51 first compares the detection result input from the impact sensor 46 with the impact determination value stored in advance in the control device 51. From this comparison, when it is determined that the detection result is equal to or less than the impact determination value, the control device 51 determines that the airbag device is not in a state to be operated, and ends the deployment control process.

  On the other hand, when it is determined from the comparison between the detection result and the impact determination value that the detection result exceeds the impact determination value, the control device 51 determines that the airbag device is to be activated, and performs the deployment control process. continue. When continuing the deployment control process, the control device 51 first performs an auxiliary airbag deployment control process for determining whether to permit or prohibit the inflation and deployment of the auxiliary airbag 36.

  FIG. 3 shows the procedure of the auxiliary airbag deployment control process. When this process is started, first, the first distance and the second distance stored in the monitoring process are read, and the distance from the occupant P to the front seat 10 is detected (step S101). Next, it is determined whether or not the distance from the passenger P to the front seat 10 exceeds the determination value (step S102). This determination value is a value for determining whether the occupant P is protected only by the airbag 32 or whether the occupant P is protected by the airbag 32 in combination with the auxiliary airbag 36. This determination value is described as a distance between the first seat portion 12 and the second seat portion 17 when the reaction force from the airbag 32 is received by the first backrest portion 13 of the front seat 10 (hereinafter referred to as a first determination value). ) And the distance between the first backrest portion 13 and the second backrest portion 18 (hereinafter referred to as a second determination value).

  First, when both the first distance and the second distance do not exceed both the first determination value and the second determination value (step S102: NO), the occupant P can be protected only by the airbag 32. It is determined that there is, and the auxiliary airbag deployment control process is terminated. After the auxiliary airbag deployment control process, the control device 51 activates only the first inflator 31. And as shown in FIG. 4, only the airbag 32 is expand | deployed when only the 1st inflator 31 act | operates. Further, the inflated airbag 32 is sandwiched between the occupant P's knees and the first backrest portion 13 of the front seat 10, and the reaction force from the airbag 32 is received by the first backrest portion 13, The passenger P is protected and restrained.

  On the other hand, when at least one of the first distance and the second distance exceeds the first determination value and the second determination value (step S102: YES), it is sufficient to protect the occupant P with only the airbag 32. Not diagnosed. In this case, the control device 51 operates the second inflator 35 to deploy the auxiliary airbag 36 (step S103). Then, the auxiliary airbag deployment control process is terminated. At the same time as S103 or before and after S103, the control device 51 also operates the first inflator 31 to deploy the airbag 32.

Next, the operation of the airbag device will be described.
In the deployment control process, when the first distance exceeds the first determination value, the airbag device inflates and deploys both the airbag 32 and the auxiliary airbag 36 as shown in FIG. The inflated airbag 32 and the auxiliary airbag 36 are sandwiched between the knee of the occupant P and the first backrest portion 13 of the front seat 10. Then, the first backrest portion 13 of the front seat 10 receives the reaction force from the airbag 32 generated during the protection of the occupant P through the auxiliary airbag 36, so that the occupant P is protected and restrained.

  Further, in the deployment control process, if the second distance exceeds the second determination value even if the first distance does not exceed the first determination value, the airbag device, as shown in FIG. Both airbags 36 are inflated and deployed. Further, in the deployment control process, when the first distance exceeds the first determination value and the second distance exceeds the second determination value, both the airbag 32 and the auxiliary airbag 36 are inflated and deployed. This is because the first backrest portion 13 of the front seat 10 receives the reaction force from the airbag 32 that occurs when protecting the occupant P through the auxiliary airbag 36, thereby providing suitable protection and restraint performance for the occupant P. Because.

The effects exhibited by the above embodiment will be described below.
(1) When at least one of the front seat 10 and the rear seat 11 is moved with respect to the other, the distance from the occupant P to the front seat 10 increases, and the inflated and deployed airbag 32 becomes the first of the front seat 10. In some cases, the backrest portion 13 cannot be contacted. Even in such a case, according to the airbag device of the embodiment, the auxiliary airbag 36 is inflated and deployed between the first backrest portion 13 and the airbag 32, so that the airbag is passed through the auxiliary airbag 36. The reaction force from 32 can be received by the first backrest 13. Therefore, regardless of the change in the distance from the occupant P to the front seat 10 due to the sliding movement or reclining of the front seat 10 or the rear seat 11, the occupant P seated on the rear seat 11 can be suitably protected.

  (2) Further, whether or not the auxiliary airbag 36 is inflated and deployed is controlled by the deployment control process. For this reason, it is possible to prevent the auxiliary airbag 36 from being inflated and deployed except when necessary, and that the airbag 32 and the auxiliary airbag 36 are excessively inflated between the occupant P and the front seat 10. Can be suppressed.

  (3) Since the auxiliary airbag 36 can be flexibly deformed, the auxiliary airbag 36 can be deformed even when the first backrest portion 13 of the front seat 10 is tilted forward. Thus, the reaction force from the airbag 32 can be suitably received by the first backrest portion 13. Accordingly, the auxiliary airbag 36 that can be flexibly deformed is inflated and deployed in front of the airbag 32 to limit the sliding movement amount, the reclining amount, etc. of the front seat 10, and the sliding movement, the reclining operation, etc. of the rear seat 11 are omitted. Even if it does not do, etc., it can respond to the change of the distance from the passenger | crew P to the front seat 10 flexibly.

  (4) In the airbag device, the main module 23 for inflating and deploying the airbag 32 and the sub-module 24 for inflating and deploying the auxiliary airbag 36 are built in the front seat 10. For this reason, when an impact is applied to the vehicle, the airbag 32 and the auxiliary airbag 36 are suitably inflated in front of the occupant P so as to catch the occupant P moving toward the front seat 10. Can be deployed.

(5) Further, since the airbag 32 is configured to protect the range of the head from below the knee of the occupant P, the protection site important for the occupant P can be suitably protected.
(6) Further, since the front seat 10 is constantly monitored for the amount of sliding movement and the amount of reclining in the monitoring process, the front seat 10 can quickly change in the distance from the passenger P to the front seat 10 due to the movement of the front seat 10 relative to the rear seat 11. And it can respond suitably.

  (7) Further, since the rear seat 11 is constantly monitored for the amount of sliding movement and the amount of reclining in the monitoring process, the rear seat 11 can quickly and easily change the distance from the passenger P to the front seat 10 due to the movement of the rear seat 11 relative to the front seat 10. It can respond suitably.

  (8) Further, by supplying gas from the first inflator 31 and the second inflator 35 to the airbag 32 and the auxiliary airbag 36, respectively, the airbag 32 and the auxiliary airbag 36 can be rapidly inflated and deployed. it can.

(Example of change)
In addition, this embodiment can also be changed and embodied as follows.
・ The weight of the occupant P is detected by the seating sensor 45, the physique of the occupant P is assumed from the detection result, and the first distance and the second distance from the occupant P to the front seat 10 are corrected based on this physique. May be. When comprised in this way, in addition to the effect of said (1)-(8), the distance from the passenger | crew P to the front seat 10 can be detected more correctly.

  The gas may be supplied to both the airbag 32 and the auxiliary airbag 36 from only one inflator. In this case, it is preferable that the inflator is provided with a switching valve or the like so that the auxiliary airbag 36 is inflated and deployed only when necessary. Moreover, even if it is a case where it comprises in this way, the effect of said (1)-(7) is acquired.

  The rear seat may be configured such that at least one of sliding movement and reclining is omitted. In such a configuration, the rear seat may be excluded from monitoring by the monitoring process. Moreover, even if comprised in this way, the effect of (1)-(8) except said (7) is acquired.

  The front seat may be configured such that at least one of sliding movement and reclining is omitted. In such a configuration, the front seat may be excluded from monitoring by the monitoring process. Moreover, even if comprised in this way, the effect of (1)-(8) except said (6) is acquired.

  Even if the airbag 32 does not necessarily protect the range of the head from the knee of the occupant P, such as the chest from the knee, the head from the knee, the chest from the knee, the chest from the abdomen, the chest from the abdomen, and the head from the abdomen. As long as any one of the parts constituting the passenger P can be protected. For example, the airbag 32 may protect the abdomen from below the knee of the occupant P and the abdomen from above the knee. In this case, it is preferable to monitor the distance from the abdomen of the occupant P to the center of the first backrest 13 of the front seat 10. In addition, the airbag 32 may protect the occupant P from below the knee, above and below the knee. In this case, it is preferable to monitor the distance from the knee of the occupant P to the center of the first seat 12 of the front seat 10, and the rear seat tilt angle sensor 44 may be omitted. However, the airbag 32 is preferably one that protects at least the head and chest of the occupant P. Even in this case, the effects (1) to (8) except for the above (5) can be obtained.

  The main module 23 and the sub module 24 do not necessarily have to be installed in the front seat 10. For example, the sub module 24 is provided on the door of the vehicle, the main module 23 is provided on the rear seat 11 or the floor surface 14, etc. Also good. Even in this case, the effects (1) to (8) except for the above (4) can be obtained.

  In the front seat 10 and the rear seat 11, the mechanism for sliding and reclining them may be an electric mechanism such as a motor or a manual mechanism by an occupant. Even if it is a case where it comprises in this way, the effect of said (1)-(8) is acquired.

  The rear seat 11 may be a separate type that is independent on the left and right in the vehicle interior, or a bench type that is connected to the left and right. Even if it is a case where it comprises in this way, the effect of said (1)-(8) is acquired.

  The airbag device according to the present invention may be applied to a vehicle having a plurality of rows exceeding two rows in the front and rear, such as three rows in the front and rear, or four rows in the front and rear. For example, if there are three rows of seats, the second row seat is the front seat and the third row seat is the rear seat, and between these second row seats and the third row seats, An airbag device may be provided so that the airbag 32 is inflated and deployed. The second row seat and the third row seat may be either a separate type or a bench type. Even if it is a case where it comprises in this way, the effect of said (1)-(8) is acquired.

Schematic which shows the vehicle interior which provided the airbag apparatus of embodiment. (A) is sectional drawing which shows the main module of an airbag apparatus, (b) is sectional drawing which shows the submodule of an airbag apparatus. The flowchart which shows the execution procedure of auxiliary | assistant airbag deployment control processing. Schematic which shows the state which expand | deployed only the airbag. Schematic which shows the state which expanded and expanded the airbag and the auxiliary | assistant airbag.

Explanation of symbols

  P ... occupant, 10 ... front seat as front seat, 11 ... rear seat as rear seat, 12 ... first seat portion as seat portion of front seat, 13 ... first as backrest portion of front seat A backrest part, 17 ... a second seat part as a seat part of the rear seat, 18 ... a second back part as a back part of the rear seat, 31 ... a first inflator, 32 ... an airbag, 35 ... a second inflator, 36 ... auxiliary airbag, 41 ... front seat position sensor constituting monitoring means, 42 ... front seat tilt angle sensor constituting monitoring means, 43 ... rear seat position sensor constituting monitoring means, 44 ... constituting monitoring means Rear seat tilt angle sensor, 45... Seating sensor constituting monitoring means, 51... Control device constituting deployment control means.

Claims (6)

Protects passengers seated in the rear seat by inflating and deploying between the front seat and the rear seat, which are juxtaposed in the longitudinal direction of the vehicle in the passenger compartment and one of which is movable with respect to the other. An airbag to
An auxiliary airbag that inflates and deploys between the airbag and the front seat;
A gas generation source for supplying gas for inflating and deploying the airbag and the auxiliary airbag; and
Based on the distance from the occupant to the front seat and the determination value for protecting the occupant only with the airbag, the auxiliary airbag is inflated and deployed when it is determined that the distance exceeds the determination value, An airbag device, comprising: a deployment control unit that prohibits inflation and deployment of the auxiliary airbag when it is determined that the distance is equal to or less than the determination value. The airbag device according to claim 1, wherein the airbag device is installed in the front seat. The airbag device according to claim 1 or 2, wherein the airbag protects at least a head and a chest among each portion constituting the occupant. The front seat includes a seat part that is slidable in the front-rear direction of the vehicle in the vehicle interior, and a backrest part that is tiltable in the front-rear direction of the vehicle with respect to the seat part,
The deployment control means includes monitoring means for monitoring a front-rear position of the seat portion with respect to the rear seat and a tilt angle of the backrest portion with respect to the seat portion, and detects the distance based on the front-rear position and the tilt angle. The airbag device according to any one of claims 1 to 3, wherein the airbag device is configured as described above. The rear seat includes a seat part that is slidable in the front-rear direction of the vehicle in the vehicle interior, and a backrest part that is tiltable in the front-rear direction of the vehicle with respect to the seat part,
The deployment control means includes monitoring means for monitoring the front-rear position of the seat portion with respect to the front seat and the tilt angle of the backrest portion with respect to the seat portion, and detects the distance based on the front-rear position and the tilt angle. The airbag device according to any one of claims 1 to 4, wherein the airbag device is configured as described above. The gas generation source includes a first inflator that supplies gas to the airbag to inflate and deploy the airbag, and a second inflator that supplies gas to the auxiliary airbag to inflate and deploy the auxiliary airbag. The airbag device according to any one of claims 1 to 5, further comprising:

Images