JP2006137398A - Side airbag device attached to seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a side airbag device attached to a seat, realizing safer development of an airbag by preventing the airbag from inflating inwardly and contacting with an occupant's body during development of the airbag at the time of side collision. <P>SOLUTION: The side airbag device 10 attached to the seat comprises an airbag main body 12 attached to an outside face of a seat back frame 11a in a seat back outside region of an automobile and developed by breaking a seat skin 11c forward inside a seat back pad 11b. A development stabilizing plate 13 extending forward from a front edge of the outside face of the seat back frame 11a inside the seat back pad 11b is provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a so-called seat-attached side airbag device incorporated outside an automobile seat back.

  Conventionally, such a side airbag device with a seat is incorporated in an outer region of a passenger seat (left seat) seat 2 and attached to an outer surface of a seat back frame 2a of the seat 2 as shown in FIG. Thus, the airbag main body 3 is deployed in the seat back pad 2b toward the front.

  According to the side airbag device 1 having such a configuration, at the time of a side collision, the airbag body 3 presses the seat skin 2c of the seat back pad 2b forward while inflating in the seat back pad 2b in the initial stage of deployment, The body of the occupant 4 seated on the passenger seat 2 is protected by breaking the sewing portion of the seat skin 2c and deploying it forward.

  However, in such a side airbag device 1, until the seat skin 2c is broken by the inflation at the initial stage of deployment of the airbag body 3, the forward inflation of the airbag body 3 is suppressed by the seat skin 2c. become.

  For this reason, as shown in FIG. 5, the airbag main body 3 tends to inflate inward in the seat back pad 2b. Thereby, the airbag main body 3 may touch the body of the passenger 4 when the airbag main body 3 is inflated.

On the other hand, Patent Document 1 discloses a vehicle side energy absorbing structure in which an airbag unit is arranged so as to deploy an airbag above an armrest shelf surface provided on a side of a seat.
Further, Patent Document 2 discloses a gap between the backrest and the vehicle body side part in order to prevent the complete deployment of the airbag from being obstructed by the structure part of the vehicle side part protruding into the passenger compartment. An impact protection device having a separating means to provide is disclosed.
Japanese Patent Laid-Open No. 10-1000076 JP 2000-25552 A

  However, in the prior arts of Patent Document 1 and Patent Document 2 described above, there is no mention of preventing the airbag in the middle of deployment from coming into contact with the occupant's body, and thus measures are taken. Absent.

  In view of the above, the present invention eliminates the fact that the airbag inflates inward during the side collision and touches the occupant's body, thereby realizing a safer airbag deployment. The object is to provide a seat-attached side airbag device.

  According to the present invention, the above object consists of an airbag main body that is attached to the outer surface of a seat back frame in a region outside the seat back of an automobile and that breaks and expands the seat skin toward the front in the seat back pad. The seat-attached side airbag device is achieved by a seat-attached side airbag device comprising a deployment stabilizing plate that extends forward from the front edge of the outer side surface of the seatback frame within the seatback pad. The development stabilizing plate is formed in a substantially vertical plate shape, for example.

  In the seated side airbag device according to the present invention, preferably, the deployment stabilizing plate is supported so as to be swingable around a rotation shaft extending in the vertical direction with respect to the front edge of the outer surface of the seat back frame. .

  The seat-attached side airbag device according to the present invention is preferably provided with a stopper for restricting the inward swing of the deployment stabilizing plate.

  According to the said structure, an airbag main body expand | deploys toward the front at the time of a side collision. At that time, in the initial stage of deployment, the airbag body is deployed forward in the seat back pad, and when deployed to the vicinity of the front end of the seat back pad, the forward deployment is temporarily performed on the seat skin of the seat back pad. Suppressed by existence.

  As a result, when the airbag main body is inflated inside the seat back pad, the inward expansion is suppressed due to the presence of the deployment stabilizing plate.

  Thereafter, when the airbag body breaks the seat skin at the front end of the seat back pad based on the deployment force, the airbag body further expands forward, and expands between the occupant's body and the vehicle body side wall of the seat. As a result, the occupant's body can be protected from side collisions.

  In this case, the forward deployment of the airbag body is regulated by the presence of the deployment stabilizing plate, so that the airbag body inflates inward immediately before breaking the seat skin and comes into contact with the occupant's body. There is no such thing. Therefore, the airbag main body does not expand to an unnecessary range during deployment, and can be fully deployed forward correctly to sufficiently protect the occupant's body.

  When the deployment stabilizing plate is supported so as to be able to swing around a rotating shaft extending in the vertical direction with respect to the front edge of the outer surface of the seat back frame, the seat stabilizer is normally seated on the seat back. On the other hand, even when a force is applied to the outside from the center of the vehicle, the unfolding feeling of the seat reaction force does not occur and the predetermined riding comfort can be obtained by swinging the deployment stabilizing plate toward the outside. .

  If a stopper that restricts the inward swing of the deployment stabilization plate is provided, the swing of the deployment stabilization plate is restricted by the stopper when the deployment stabilization plate attempts to swing inward. Even when the airbag main body is inflated while the airbag is being deployed at the time of a side collision, the expansion of the airbag main body is reliably suppressed by the deployment stabilizing plate that is controlled to swing by the stopper.

  Thus, according to the present invention, the airbag main body of the seated side airbag device is not inflated inward and touches the occupant's body at the time of a side collision, so that the airbag main body is correctly moved forward. Can be deployed towards.

The present invention will be described in detail below based on the embodiments shown in the drawings.
FIG. 1 shows an embodiment of a seated side airbag device according to the present invention. In FIG. 1, a side airbag device 10 is incorporated in an outer region of a passenger seat (left seat) seat 11 in the illustrated case, and is attached to an outer surface of a seat back frame 11a of the seat 11 and is installed in a seat back pad 11b. The airbag main body 12 is deployed forward and the deployment stabilizer 13 extends forward from the front edge of the outer surface of the seat back frame 11a.

  The airbag main body 12 has a known configuration, and is attached to the outer surface of the seat back frame 11a, so that, for example, a signal from a side collision sensor (not shown) at the time of a side collision, The seat 14 is deployed between a seated occupant 14 and an inner surface (not shown) such as a door of a vehicle body.

  Here, at the time of side collision, the airbag main body 12 presses the seat cover 11c of the seat back pad 11b forward while inflating in the seat back pad 11b, and then breaks the sewing portion of the seat cover 11c. The body of the occupant 14 seated on the passenger seat 11 is protected by unfolding forward.

  The deployment stabilizing plate 13 is formed in a plate shape, and is supported at the front edge of the outer surface of the seat back frame 11a so as to be swingable around a rotation shaft 13a extending in the vertical direction as indicated by an arrow A. At the same time, the inward swing is restricted by a stopper 15 that is fixedly arranged inside.

  The seat-attached side airbag device 10 according to the embodiment of the present invention is configured as described above. At the time of a side collision, the airbag body 12 is deployed forward based on a signal from a side collision sensor, for example.

  At that time, at the initial stage of deployment, the airbag body 12 is deployed forward in the seat back pad 11b, and when deployed to the vicinity of the front end of the seat back pad 11b, the forward deployment is temporarily suspended. This is suppressed by the presence of the sheet skin 11c.

  As a result, the airbag body 12 tends to expand inward in the seat back pad 11b while pressing the seat skin 11c of the seat back pad 11b forward.

  At this time, due to the presence of the deployment stabilization plate 13 on the inner side, the airbag body 12 swings the deployment stabilization plate 13 inward, but then the deployment stabilization plate 13 abuts against the stopper 15, As shown in FIG. 2, the inward expansion of the airbag body 12 is suppressed. Therefore, the airbag main body 12 does not touch the body of the occupant 14 due to the inward expansion.

  Subsequently, when the airbag main body 12 breaks the seat skin 11c at the front end of the seat back pad 11b based on the deploying force, the airbag main body 12 further expands forward, and the body of the occupant 14 of the seat It expands between the inner side surfaces of the doors of the vehicle body and the body of the occupant 14 is protected from side collision.

  FIG. 3 is a graph showing a change in the deflection of the left front seat by a simulation at the time of a side collision in the seated side airbag device 10 according to the embodiment of the present invention and the conventional seated side airbag device 1. , (B), (C) show the amount of lateral chest deflection at different height positions.

According to this, in the conventional seat-attached side airbag device 1, as shown by the dotted line in the figure, the inward expansion occurs after about 14 ms from the side collision, and in particular, about 38 mm after 33 ms in (C). Maximum deflection.
On the other hand, in the seat-attached side airbag device 10 according to the embodiment of the present invention, as shown by the solid line in the figure, the maximum deflection is about 25 mm after about 33 ms after the side collision, It can be seen that the deflection is greatly reduced.

  As described above, in the seated side airbag device 1 according to the embodiment of the present invention, the deployment stabilizing plate 13 regulates the inflation direction of the airbag body 12, thereby stabilizing the deployment behavior of the airbag body 12. By concentrating the expansion direction forward, the deployment can be made relatively quick. Therefore, the airbag body 12 is prevented from being deployed to an unnecessary range, and it is possible to eliminate touching the occupant's body during deployment. Further, since the deployment stabilizing plate 13 is embedded in the seat back pad 11b, the occupant does not feel uncomfortable when sitting.

  As described above, the present invention can of course be implemented in various forms without departing from the spirit thereof. For example, in the above-described embodiment, the development stabilizing plate 13 is configured as a flat plate. However, the shape is not limited to this and may be any shape. Thereby, the discomfort of the seat reaction force when the occupant is seated is further eliminated.

  Further, in the above-described embodiment, the deployment stabilizing plate 13 is supported so as to be swingable with respect to the front edge of the outer surface of the seat back frame 11a, and swinging inward by the stopper 15 is restricted. Not only this but the expansion | deployment stabilization board 13 may be fixed with respect to the front edge of the outer surface of the seat back frame 11a. Also in this case, the inward expansion of the airbag main body 12 during deployment can be similarly regulated by the deployment stabilizing plate 13.

  Furthermore, in the above-described embodiment, the seat-attached side airbag device 10 incorporated in the outer region of the seat back of the passenger seat 11 has been described, but is not limited to this, and other seats, that is, a driver seat or a rear seat. It is obvious that the present invention can be applied to a seat-attached side airbag device incorporated in the outer region.

1 is a schematic cross-sectional view illustrating a configuration of an embodiment of a seated side airbag device according to the present invention. It is a schematic cross-sectional view which shows the time of the airbag deployment by the side collision of the side airbag apparatus with a sheet | seat of FIG. 3 is a graph showing the amount of deflection of the left front seat at the time of a side collision according to a simulation of the seated side airbag device of FIG. It is a general | schematic cross-sectional view which shows the structure of an example of the conventional seated side airbag apparatus. FIG. 5 is a schematic cross-sectional view showing the airbag deployed by side collision of the seated side airbag device of FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Side airbag apparatus with seat 11 Passenger seat 11a Seat back frame 11b Seat back pad 11c Seat skin 12 Air bag main body 13 Deployment stabilizing plate 13a Rotating shaft 14 Crew 15 Crew 15 Stopper

Claims (3)

In a seat-back side airbag device comprising an airbag body that is attached to an outer surface of a seatback frame in a seatback outer region of an automobile and breaks and expands a seat skin toward the front in a seatback pad.
A seat-attached side airbag device, comprising: a deployment stabilizing plate extending forward in a seat back pad from a front edge of an outer side surface of the seat back frame.   The seating according to claim 1, wherein the development stabilizing plate is supported so as to be swingable around a rotation axis extending in a vertical direction with respect to a front edge of an outer surface of the seat back frame. Side airbag device. The seat-attached side airbag device according to claim 2, further comprising a stopper for restricting the inward swing of the deployment stabilizing plate.

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