JP5999031B2 - Air bag device for rear seat passengers - Google Patents

Description

  The present invention relates to a rear seat occupant airbag device.

  An airbag device for a rear seat occupant having an airbag mounted on the back side of the front seat back is disclosed (see Patent Document 1 and Patent Document 2). Further, as an airbag device for a rear seat occupant, a structure in which an airbag device is attached to a roof member in front of the rear seat (see Patent Document 3), and a structure in which an airbag is accommodated in a lower portion of a center pillar (see Patent Document 4). Is disclosed.

JP-A-4-166455 JP-A-4-166456 JP-A-10-264761 JP 2008-80919 A

  All of the conventional examples described above are intended to protect the rear seat occupant during a frontal collision. At the time of a frontal collision (minute lap collision) or an oblique collision outside the front side member in the vehicle width direction, the rear seat occupant tends to move obliquely forward in the vehicle traveling direction toward the collision direction. However, in the conventional example described above, the countermeasure is not considered.

  In consideration of the above-described facts, an object of the present invention is to suppress the rearward occupant from moving forward obliquely during a minute lap collision or an oblique collision.

The invention according to claim 1 (air bag device for the rear seat occupant) is mounted on the seat back or headrest of the front seat, and is configured to inflate and deploy to the rear seat side upon receipt of gas supply. When viewed visually, an airbag is formed on the side facing the rear seat occupant with a recess recessed toward the front of the vehicle rather than both ends in the vehicle width direction, and the recess is provided at the lower portion of the airbag. The tethers that connect the left and right ends across the straddle and are inclined obliquely upward on the vehicle rear side with respect to the horizontal in the inflated and deployed state of the airbag .

In the airbag device for the rear seat occupant according to the first aspect , at the time of the collision of the vehicle, the airbag is inflated and deployed toward the rear of the vehicle from the seat back or the headrest of the front seat, thereby restraining the rear seat occupant. When the airbag is inflated and deployed in a plan view, a recess is formed on the side facing the rear seat occupant that is recessed toward the front side of the vehicle from both ends in the vehicle width direction. When the body of the rear seat occupant enters the concave portion at the time of a minute lap collision or an oblique collision, the rear seat occupant can be prevented from moving obliquely forward. In addition, since the movement of the arm of the rear seat occupant to the front of the vehicle can be suppressed, the inertial mass of the upper body can be reduced, and the posture change of the rear seat occupant can be suppressed.
In addition, a part of the rear seat occupant hits the tether, and the tether is pushed forward of the vehicle, so that both end portions of the airbag come close to each other and restrain the rear seat occupant. For this reason, even when the movement amount of the rear seat occupant becomes large at the time of a vehicle collision, the occupant restraint of the airbag can be improved.
Further, in the inflated and deployed state of the airbag, since the tether is inclined obliquely upward on the vehicle rear side with respect to the horizontal, when a part of the rear seat occupant pushes the tether, the position of the airbag is on the vehicle lower side. It can suppress changing to. Therefore, the head of the rear seat occupant can be appropriately restrained by the airbag.

The invention according to claim 2 (air bag device for the rear seat occupant) is mounted on the seat back or headrest of the front seat, and is configured to inflate and deploy to the rear seat side upon receipt of gas supply. When viewed visually, an airbag in which a recessed portion recessed toward the vehicle front side rather than both ends in the vehicle width direction is formed on the side facing the rear seat occupant, and a lower portion of the airbag and the airbag And a tether that is provided at a position facing the knee portion of the rear seat occupant in the vehicle front-rear direction in the inflated and deployed state and connects the left and right end portions across the recess.

In the airbag device for a rear seat occupant described in claim 2 , at the time of a vehicle collision, the airbag is inflated and deployed from the front seat back or headrest toward the rear of the vehicle, thereby restraining the rear seat occupant. When the airbag is inflated and deployed in a plan view, a recess is formed on the side facing the rear seat occupant that is recessed toward the front side of the vehicle from both ends in the vehicle width direction. When the body of the rear seat occupant enters the concave portion at the time of a minute lap collision or an oblique collision, the rear seat occupant can be prevented from moving obliquely forward. In addition, since the movement of the arm of the rear seat occupant to the front of the vehicle can be suppressed, the inertial mass of the upper body can be reduced, and the posture change of the rear seat occupant can be suppressed.
In addition, a part of the rear seat occupant hits the tether, and the tether is pushed forward of the vehicle, so that both end portions of the airbag come close to each other and restrain the rear seat occupant. For this reason, even when the movement amount of the rear seat occupant becomes large at the time of a vehicle collision, the occupant restraint of the airbag can be improved.
Further, since the tether is provided at a position facing the knee portion of the rear seat occupant in the vehicle front-rear direction in the inflated and deployed state of the airbag, the knee portion can stably push the tether. For this reason, the passenger | crew restraint property of an airbag can further be improved.

The invention according to claim 3 is mounted on the seat back or headrest of the front seat and is configured to inflate and deploy to the rear seat side upon receipt of gas supply. When the inflated and deployed state is viewed in plan view, the rear seat occupant On the side facing the vehicle, there is an airbag in which a recess recessed toward the vehicle front side is formed from both ends in the vehicle width direction. The width of the recess is wider on the upper side than on the lower side.

In the airbag device for a rear seat occupant described in claim 3 , at the time of a vehicle collision, the airbag is inflated and deployed toward the rear of the vehicle from the seat back or the headrest of the front seat, thereby restraining the rear seat occupant. When the airbag is inflated and deployed in a plan view, a recess is formed on the side facing the rear seat occupant that is recessed toward the front side of the vehicle from both ends in the vehicle width direction. When the body of the rear seat occupant enters the concave portion at the time of a minute lap collision or an oblique collision, the rear seat occupant can be prevented from moving obliquely forward. In addition, since the movement of the arm of the rear seat occupant to the front of the vehicle can be suppressed, the inertial mass of the upper body can be reduced, and the posture change of the rear seat occupant can be suppressed.
Moreover, since the upper part side is wider than the lower part side about the width | variety of a recessed part, the head of a rear-seat passenger | crew can be restrained in a wide range at the time of a micro lap collision or a diagonal collision.

The invention according to claim 4 is mounted on the seat back or headrest of the front seat, is configured to inflate and deploy to the rear seat side upon receipt of gas supply, and when the inflated and deployed state is viewed in plan view, On the side facing the vehicle, an airbag formed with a recess recessed toward the vehicle front side from both ends in the vehicle width direction, and provided at the lower portion of the airbag, the left and right end portions straddling the recess The airbag has a central chamber located on the vehicle front side of the recess, and side chambers located on both sides in the vehicle width direction of the recess, the central chamber comprising: An internal tether is divided into an upper chamber and a lower chamber, and gas is supplied to the lower chamber, and the internal tether has a vent hole for supplying gas from the lower chamber to the upper chamber And the side chamber is It is in fluid chamber and the communication.

In the airbag device for a rear seat occupant described in claim 4 , at the time of a vehicle collision, the airbag is inflated and deployed from the front seat back or headrest toward the rear of the vehicle, thereby restraining the rear seat occupant. When the airbag is inflated and deployed in a plan view, a recess is formed on the side facing the rear seat occupant that is recessed toward the front side of the vehicle from both ends in the vehicle width direction. When the body of the rear seat occupant enters the concave portion at the time of a minute lap collision or an oblique collision, the rear seat occupant can be prevented from moving obliquely forward. In addition, since the movement of the arm of the rear seat occupant to the front of the vehicle can be suppressed, the inertial mass of the upper body can be reduced, and the posture change of the rear seat occupant can be suppressed.
In addition, a part of the rear seat occupant hits the tether, and the tether is pushed forward of the vehicle, so that both end portions of the airbag come close to each other and restrain the rear seat occupant. For this reason, even when the movement amount of the rear seat occupant becomes large at the time of a vehicle collision, the occupant restraint of the airbag can be improved.
Further, when the airbag is inflated and deployed, gas is first supplied to the lower chamber of the central chamber, and gas is supplied from the lower chamber to the side chamber. Gas is supplied from the lower chamber to the upper chamber through the vent hole of the internal tether. For this reason, it is possible to preferentially deploy the lower chamber and the side chamber for which early deployment is desired, and to prepare for restraint of the portion close to the front seat of the rear seat occupant and restraint of the shoulder portion of the rear seat occupant. Since the upper chamber of the central chamber is a part that mainly restrains the head, the restraining timing may be made relatively late.

According to the airbag device for a rear seat occupant described in claim 1 , it is possible to obtain an excellent effect that the rear seat occupant can be prevented from moving obliquely forward at the time of a minute lap collision or an oblique collision.
Moreover, the outstanding effect that the passenger | crew restraint property of an airbag can be improved is acquired.
Furthermore, the outstanding effect that the head of a backseat passenger | crew can be restrained appropriately with an airbag is acquired.

According to the airbag device for a rear seat occupant described in claim 2 , it is possible to obtain an excellent effect that the rear seat occupant can be prevented from moving obliquely forward at the time of a minute lap collision or an oblique collision.
Moreover, the outstanding effect that the passenger | crew restraint property of an airbag can be improved is acquired.
Furthermore, the outstanding effect that the passenger | crew restraint property of an airbag can be improved further is acquired.

According to the airbag device for a rear seat occupant described in claim 3 , an excellent effect is obtained that the rear seat occupant can be prevented from moving obliquely forward at the time of a minute lap collision or an oblique collision.
In addition, it is possible to obtain an excellent effect that the head of the rear seat occupant can be restrained in a wide range at the time of a minute lap collision or oblique collision.

According to the airbag device for a rear seat occupant described in claim 4 , it is possible to obtain an excellent effect that the rear seat occupant can be prevented from moving obliquely forward at the time of a minute lap collision or an oblique collision.
Moreover, the outstanding effect that the passenger | crew restraint property of an airbag can be improved is acquired.
Furthermore, the lower chamber and the side chamber, which are desired to be deployed early, are preferentially deployed, and it is possible to prepare for restraint of a portion close to the front seat of the rear seat occupant and restraint of the shoulder portion of the rear seat occupant. An effect is obtained.

FIG. 1 to FIG. 3 relate to the first embodiment, and FIG. 1 is a perspective view of the airbag inflated and deployed as seen from obliquely rearward of the vehicle center. It is a side view which shows the restraint state of the rear seat passenger | crew by an airbag. It is a top view which shows the restraint state of the backseat passenger | crew by an airbag. 4 and 5 relate to the second embodiment, and FIG. 4 is a perspective view of the airbag inflated and deployed as viewed obliquely from the rear center of the vehicle. It is a side view which shows the restraint state of the rear seat passenger | crew by an airbag. It is a front view which shows the state which the airbag which concerns on 3rd Embodiment inflate-deployed. It is a partially broken perspective view which shows the structure of the airbag which concerns on 4th Embodiment.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

[First Embodiment]
1 and 2, the airbag device 10 for a rear seat occupant according to the present embodiment includes an airbag 16 mounted on a seat back 14 of the front seat 12. The airbag 16 is configured to be inflated and deployed to the rear seat 18 side upon receipt of gas supply. When the inflated and deployed state of the airbag 16 is viewed in a plan view, the vehicle front side of the vehicle width direction, for example, the center portion 16C in the vehicle width direction (seat width direction), for example, on the side facing the rear seat occupant 22 A recess 16B that is recessed to the side is formed. In other words, the airbag 16 has a shape in which both end portions 16A protrude toward the vehicle rear side from the recessed portion 16B during inflation and deployment, that is, a substantially inverted U shape in plan view.

  The maximum width of the recess 16B in the vehicle width direction (interval between both end portions 16A) is substantially uniform regardless of the vehicle vertical direction position. This maximum width generally corresponds to the shoulder width of the rear seat occupant 22 (FIG. 2), and is desirably larger than the shoulder width. The depth of the recess 16B in the vehicle front-rear direction is set such that the head 22H of the rear seat occupant 22 can enter to some extent. That is, the shape of the recess 16B is a shape suitable for restraining the head 22H and the upper body 22A of the rear seat occupant 22 (FIG. 2).

  A tether 24 is provided at the lower portion of the airbag 16 to connect the left and right ends 16A across the recess 16B. The tether 24 is connected to both end portions 16A and the central portion 16C of the airbag 16 along the contour of the recess 16B, and is deployed in a film shape below the recess 16B when the airbag 16 is inflated and deployed. ing. As shown in FIG. 2, the tether 24 is preferably inclined obliquely upward to the rear of the vehicle with respect to the horizontal in the inflated and deployed state of the airbag 16. This is because when the knee 22K of the rear seat occupant 22 pushes in the tether 24, the airbag 16 can be prevented from being displaced downward in the vehicle. Note that the inclination of the tether 24 may be partial. The inclination angle of the tether 24 may change according to the vehicle longitudinal direction position. Instead of the inclination, the tether 24 may be curved in the side cross section.

  The airbag 16 in a normal state is stored in a module case 32 together with an inflator 26 serving as a gas supply source in a folded state, and is mounted in the seat back 14 of the front seat 12. On the back side of the seatback 14, an airbag door 28 that is deployed by the inflation pressure of the airbag 16 is provided.

  In addition, although the airbag 16 shall be mounted in the seat back 14 of the front seat 12, it is not restricted to this, The airbag 16 may be mounted in the headrest 15. FIG.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. 1 to 3, in the airbag device 10 for a rear seat occupant according to the present embodiment, the inflator 26 is operated to inflate inflation gas when the vehicle collides. The airbag 16 starts to inflate and deploy upon receiving this gas supply. When the airbag door 28 is deployed due to the inflation pressure of the airbag 16, the airbag 16 is inflated and deployed from the seat back 14 of the front seat 12 toward the rear of the vehicle. The airbag 16 can restrain the rear seat occupant 22.

  When the inflated and deployed state of the airbag 16 is viewed in a plan view, a concave portion 16B that is recessed toward the vehicle front side from both end portions 16A in the vehicle width direction is formed on the side facing the rear seat occupant 22. At the time of a minute lap collision or an oblique collision, the head 22H or the upper body 22A of the rear seat occupant 22 enters the recess 16B, so that the rear seat occupant 22 can be prevented from moving obliquely forward. Further, since the shoulder portion 22S of the rear seat occupant 22 is restrained by the both end portions 16A, the movement of the arm portion (not shown) of the rear seat occupant 22 to the front of the vehicle can be suppressed, so that the inertial mass of the upper body can be reduced. It can reduce, and the posture change of the backseat occupant 22 can be suppressed.

  The airbag 16 is provided with a tether 24. As shown in FIG. 2 and FIG. 3, when the movement amount of the rear seat occupant 22 increases during a vehicle collision, the knee portion 22 </ b> K of the rear seat occupant 22 hits the tether 24. When the knee portion 22K pushes the tether 24 forward of the vehicle, both end portions 16A of the airbag 16 approach each other, and the recess portion 16B sinks, and the rear seat occupant 22 is restrained. Accordingly, the airbag 16 can restrain the head 22H of the rear seat occupant 22 so as to be sandwiched from both sides in the vehicle width direction, for example. For this reason, even when the amount of movement of the rear seat occupant 22 becomes large at the time of a vehicle collision, the occupant restraint of the airbag 16 can be improved.

  As shown in FIG. 2, when the tether 24 is inclined obliquely upward on the vehicle rear side with respect to the horizontal in the inflated and deployed state of the airbag 16, the knee portion 22 </ b> K of the rear seat occupant 22 is tethered. When pushing in 24, it can suppress that the position of this airbag 16 changes to the vehicle lower side. Since the airbag 16 can be maintained at the height position of the head 22 </ b> H, the head 22 </ b> H can be appropriately restrained by the airbag 16.

[Second Embodiment]
4 and 5, in the airbag device 20 for the rear seat occupant according to this embodiment, the tether 24 faces the knee portion 22K of the rear seat occupant 22 in the vehicle front-rear direction when the airbag 16 is inflated and deployed. In the position. The tether 24 is in a state of being developed in a belt shape, for example. The tether 24 connects both end portions 16A in the vehicle width direction so as to straddle the recess 16B of the airbag 16. The tether 24 and the central portion 16C of the airbag 16 are separated from each other in the vehicle front-rear direction, and the tether 24 can be pushed forward by the knee portion 22K of the rear seat occupant 22.

  The tether 24 is provided, for example, in a range from the approximate center in the height direction of the airbag 16 to the lower end. Note that the tether 24 may be configured to be narrower in the vehicle vertical direction. The upper part of the recessed part 16B in the airbag 16 is a part into which the head 22H mainly enters the rear seat occupant 22, and it is necessary to prevent the recessed part 16B from being blocked by the tether 24. For this reason, the tether 24 is provided in the lower part of the airbag 16.

  Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. 4 and 5, in the airbag device 20 for the rear seat occupant according to the present embodiment, the position where the tether 24 faces the knee portion 22K of the rear seat occupant 22 in the vehicle front-rear direction when the airbag 16 is inflated and deployed. Is provided. Accordingly, when the movement amount of the rear seat occupant 22 becomes large at the time of a vehicle collision, the knee portion 22K can stably push the tether 24 in the arrow A direction. As a result, both end portions 16A of the airbag 16 approach each other, and the recess 16B is squeezed to restrain the rear seat occupant 22. For this reason, the passenger | crew restraint property of the airbag 16 can further be improved.

[Third Embodiment]
In FIG. 6, in the airbag device 30 for the rear seat occupant according to the present embodiment, the upper side of the recess 16 </ b> B of the airbag 16 is wider than the lower side. The width of the recess 16B is, for example, the inner dimension in the vehicle width direction of the left and right ends 16A at the end of the recess 16B on the vehicle rear side. The width of the recess 16B changes linearly in the vehicle vertical direction, but is not limited to this, and may change in a curved line or may change in stages.

  Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 6, in the airbag device 30 for the rear seat occupant according to the present embodiment, since the upper side is wider than the lower side with respect to the width of the concave portion 16B, the head 22H of the rear seat occupant 22 at the time of minute lap collision or oblique collision. Even if the position of the head changes to the left and right, the head 22H can be restrained in a wide range. When the knee portion 22K pushes the tether 24, the width of the concave portion 16B of the airbag 16 is narrowed, the both end portions 16A approach each other, and the concave portion 16B is recessed, so that the head portion 22H can be restrained appropriately.

[Fourth Embodiment]
7, in the airbag device 40 for the rear seat passenger according to the present embodiment, the airbag 16 includes a central chamber 36 positioned on the vehicle front side of the recess 16B, and side portions positioned on both sides of the recess 16B in the vehicle width direction. Chamber 38. The central chamber 36 is divided into an upper chamber 36U and a lower chamber 36L by an internal tether 34. The side chamber 38 communicates with the lower chamber 36L, and the side chamber 38 and the upper chamber 36U are partitioned by, for example, a seam 42.

  The inflator 26 is provided on the lower chamber 36L side, and the gas from the inflator 26 is configured to be supplied to the lower chamber 36L. The tether 24 is provided at a height position corresponding to the lower chamber 36L, and the tether 24 is rapidly deployed when the lower chamber 36L is inflated and deployed at an early stage. The internal tether 34 is provided with a vent hole 34A for supplying gas from the lower chamber 36L to the upper chamber 36U.

  Note that the means for partitioning each chamber of the airbag 16 is not limited to the internal tether 34 or the seam 42, and can be changed as appropriate. The cross-sectional area of the path from the lower chamber 36L to the side chamber 38 and the opening area of the vent hole 34A are set in consideration of the capacity of each chamber, the deployment timing, and the like.

  Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In the rear seat passenger airbag device 40 according to the present embodiment in FIG. 7, when the airbag 16 is inflated and deployed, gas from the inflator 26 is first supplied to the lower chamber 36 </ b> L of the central chamber 36. Gas is supplied from the chamber 36L to the side chamber 38 in the direction of arrow S. From the lower chamber 36L to the upper chamber 36U, gas is supplied in the direction of arrow U through the vent hole 34A of the internal tether 34. For this reason, since the gap between the rear seat occupant 22 and the front seat 12 is narrow, the lower chamber 36L and the tether 24, which are desired to be deployed early, and the side chamber 38 are preferentially deployed, and the front seat of the rear seat occupant 22 is obtained. 12, for example, the restraint of the knee 22 </ b> K, the pushing of the tether 24 by the knee 22 </ b> K, and the restraint of the shoulder 22 </ b> S of the rear seat occupant 22 (see FIGS. 2 and 3). Since the upper chamber 36U of the central chamber 36 is a portion that mainly restrains the head portion 22H (see FIG. 2), the restraining timing may be set later than that of the lower chamber 36L. This embodiment is particularly effective when the rear seat occupant 22 is close to the front seat 12 (see FIG. 2).

[Other Embodiments]
Although the tether 24 is inclined obliquely upward on the vehicle rear side with respect to the horizontal, it does not necessarily have to be inclined in this way. In the first embodiment, the tether 24 is provided in a film shape, and in the second embodiment, the tether 24 is provided in a strip shape. However, the shape and arrangement of the tether 24 are not limited thereto. Note that the tether 24 itself may be omitted.

DESCRIPTION OF SYMBOLS 10 Rear seat occupant airbag device 12 Front seat 14 Seat back 15 Headrest 16 Air bag 16A Both ends 16B Recessed portion 16C Center portion 20 Rear seat occupant airbag device 22 Rear seat occupant 22K Knee portion 24 Tether 30 Rear seat occupant air Bag device 34 Internal tether 34A Ventilation hole 36 Central chamber 36L Lower chamber 36U Upper chamber 38 Side chamber 40 Rear seat occupant airbag device

Claims (4)

It is mounted on the seat back or headrest of the front seat, and is configured to inflate and deploy to the rear seat side upon receiving gas supply.When the inflated and deployed state is viewed in plan view, the vehicle on the side facing the rear seat occupant An airbag in which a recess recessed toward the vehicle front side than both ends in the width direction is formed;
A tether provided at a lower portion of the airbag , connecting the left and right end portions across the recess, and inclined obliquely upward on the vehicle rear side with respect to the horizontal in an inflated and deployed state of the airbag ;
An air bag device for a rear seat occupant having: It is mounted on the seat back or headrest of the front seat, and is configured to inflate and deploy to the rear seat side upon receiving gas supply.When the inflated and deployed state is viewed in plan view, the vehicle on the side facing the rear seat occupant An airbag in which a recess recessed toward the vehicle front side than both ends in the width direction is formed;
A tether that is provided at a lower portion of the airbag and in a position facing the knee portion of the rear seat occupant in the vehicle front-rear direction in the inflated and deployed state of the airbag , and connects the left and right end portions across the recess. When,
An air bag device for a rear seat occupant having: It is mounted on the seat back or headrest of the front seat, and is configured to inflate and deploy to the rear seat side upon receiving gas supply.When the inflated and deployed state is viewed in plan view, the vehicle on the side facing the rear seat occupant It has an airbag in which a recessed portion that is recessed toward the vehicle front side than both ends in the width direction is formed,
The width of the recess is an airbag device for a rear seat occupant whose upper side is wider than the lower side. It is mounted on the seat back or headrest of the front seat, and is configured to inflate and deploy to the rear seat side upon receiving gas supply.When the inflated and deployed state is viewed in plan view, the vehicle on the side facing the rear seat occupant An airbag in which a recess recessed toward the vehicle front side than both ends in the width direction is formed;
A tether that is provided at a lower portion of the airbag and connects the left and right end portions across the concave portion;
The airbag has a central chamber located on the vehicle front side of the recess, and side chambers located on both sides in the vehicle width direction of the recess,
The central chamber is divided into an upper chamber and a lower chamber by an internal tether, and gas is supplied to the lower chamber,
The internal tether is provided with a vent for supplying gas from the lower chamber to the upper chamber,
The side chamber is an airbag device for a rear seat occupant communicating with the lower chamber.

Images