JP2012148628A - Airbag device for passenger seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an airbag device for a passenger seat which is capable of weakening the moment acting on an occupant or a child seat according to a Pos.1 position or Pos.2 position even when the head of the occupant getting on the passenger seat exists in the position or a backrest of the child seat is present and capable of reducing the ejecting force of the airbag to make the damaging to the occupant low with light weight and at low cost.SOLUTION: In the inflation-deployment of the airbag 10, it is suppressed to a dummy head part 20a existing in the Pos.2 position by a front flap 11 covering the expansion side 10a of the airbag 10 from the upper side to the lower side that the dummy head part 20a is inclined forward and it is suppressed to the dummy head part 20a existing in the Pos.1 position by a rear flap 12 covering the expansion side 10a of the airbag 10 from the lower side to the upper side that the dummy head part 20a is inclined backward suddenly.

Description

  The present invention relates to a passenger seat airbag device.

  The airbag device for passenger seats ensures safety for passengers by inflating and deploying airbags in the event of a vehicle collision and restraining the center of the chest and the head of the passengers in the passenger seat from the front of the passengers. It is used for the purpose of performing.

  In particular, the airbag device for the passenger seat is designed to ensure safety for the passenger by inflating and deploying the airbag when the passenger on the passenger seat is sitting at the correct boarding position. The airbag deployment direction, deployment speed, internal pressure in the airbag, and the like are set. However, while the vehicle is running, an instrument panel in which the passenger's head holds the airbag device for the passenger's seat away from the correct boarding position in order to take in and out things stored in the dashboard. Sometimes it gets close to.

  Thus, the position where the passenger is not in the correct riding state is called the OOP (out of position) position. If a vehicle accident occurs accidentally while the occupant is at the OOP position, the airbag device inflates and deploys the airbag assuming that the occupant is sitting at the correct riding position. However, at the initial stage of airbag deployment, a controller with advanced sensor functions is used to prevent an airbag that is inflating at high speed from interfering with an occupant at the OOP position. There has also been proposed a passenger seat airbag apparatus configured to control a multistage inflator.

  It does not take into account that the occupant is in the OOP position, but avoids early-stage interference with the child seat attached to the occupant or the passenger seat at the early stage of inflated deployment. A possible airbag device (see Patent Document 1) has been proposed.

  The airbag device disclosed in Patent Document 1 is configured to cover the folded airbag along the longitudinal direction of the vehicle body with a deployment restriction sheet. One end of the development restricting sheet is fixed to a retainer that supports the inflator, and is arranged along the inner surface of the module cover. The length of the deployment regulation sheet is configured to be larger than the inner circumference of the module cover along the longitudinal direction of the vehicle body, and the extra length of the deployment regulation sheet is folded in a bellows shape on the front of the airbag. It is on.

  As the deployment restriction sheet of this airbag device, there are shown configuration examples of a case where it is used for a driver's seat airbag and a case where it is used for a passenger's seat airbag. When the deployment restriction sheet is used for the driver airbag or the passenger airbag, one end of the deployment regulation sheet is fixed to the vehicle rear side.

JP 2001-334900 A

Although the airbag apparatus described in Patent Document 1 is described with respect to an airbag for a driver's seat and an airbag for a passenger's seat, the present invention relates to an airbag apparatus for a passenger's seat. Will describe an airbag for a passenger seat among the airbag devices described in Patent Document 1.

  In the airbag device described in Patent Document 1, as a measure for avoiding early interference between the airbag that is inflated at high speed and the child seat attached to the passenger or the passenger seat at the initial stage of inflation and deployment, A deployment restriction sheet is provided. The fixing point of the deployment regulation sheet is fixed to the rear side of the vehicle, and the deployment regulation sheet protrudes to the passenger seat side as the airbag inflates, while the free end side of the deployment regulation sheet moves from the vehicle front side to the passenger seat side. It is configured to be pulled down through.

  The structure of the airbag apparatus in Patent Document 1 will be described with reference to FIGS. As shown in FIG. 9, a recess 52 is formed in a shallowly inclined upper surface 51 of the dashboard 50, and a passenger seat airbag device 53 is accommodated in the recess 52. In the backrest portion 56 of the child seat 55 attached to the passenger seat 54, a part of the backrest portion 56 that is slightly lowered from the top of the backrest portion 56 is in contact with the dashboard 50.

  However, depending on the design of the vehicle, the mounting position of the airbag device for the passenger's seat may be designed to be further arranged on the rear side of the dashboard, and the arrangement position of the backrest portion of the child seat is The dashboard may be designed in a shape that is closer to the rear end of the dashboard. Furthermore, the child seat may be configured such that a base configured separately from the child seat main body is installed on the seat seat surface of the passenger seat, and the child seat main body is engaged with the base on the base.

And when a child seat main-body part is attached on a base, the top part position of the backrest part of a child seat may be distribute | arranged a little upwards with respect to the upper surface of a dashboard.
Even in such a case, it is necessary to generate a preferable pressing force on the backrest portion of the child seat and reduce the movement of the child seat to turn to the vehicle rear side. Thus, there is a case where the movement of the child seat rotating to the vehicle rear side cannot be reduced.

  Therefore, as shown in FIG. 10, the child seat 55 that has become high due to the use of a base or the like is attached to a position in the dashboard 50 that is close to the passenger seat airbag device 53 but somewhat apart. See if you are. At this time, due to the inflation and deployment of the airbag 58, the deployment regulating sheet 60 enters between the child seat 55 and the airbag 58, and the deployment regulating sheet 60 applies a force in the direction indicated by the arrow A− to the child seat 55. Further, the airbag 58 that is inflated and deployed to the child seat 55 applies a force in the direction indicated by the arrow A +.

  That is, a force only in one direction indicated by the arrow A + direction or the arrow A− direction does not act on the child seat 55 significantly. Therefore, it is possible to reduce the movement of the child seat 55 rotating toward the vehicle rear side.

  However, in the arrangement relationship as shown in FIG. 9, a portion close to the base end portion of the development restricting sheet 60 (see FIG. 10) acts on the child seat 55, so the arrow by the development restricting sheet 60 (see FIG. 10). The force in the A-direction does not act greatly on the child seat 55. Therefore, the force in the direction indicated by the arrow A + from the airbag 58 (see FIG. 10) that is inflated and deployed acts greatly. And even if the expansion | deployment control sheet | seat 60 (refer FIG. 10) is used, the force of the direction shown as A + will act with respect to the child seat 55 largely.

  Further, in the airbag device disclosed in Patent Document 1, when the airbag is inflated and deployed when the head of the occupant approaching the OOP position is approaching the airbag, the deployment restriction sheet is associated with the inflation and deployment of the airbag. Will protrude toward the head of the passenger. In addition, the extra length portion of the deployment regulating sheet is folded in a bellows shape and placed on the front surface of the airbag.

  Therefore, if the bellows-like portion of the deployment restriction sheet comes into contact with the occupant's head, the bellows-like portion of the deployment regulation sheet is pressed in a sandwich shape by the occupant's head and the airbag. . In such a case, the deployment restricting sheet is prevented from being unfolded by the passenger's head, and the unfolding of the unfolding restriction sheet cannot be performed smoothly.

  In addition, since one end of the deployment restricting sheet that is deployed together with the airbag is fixed to the vehicle rear side, the free end side of the deployment regulating sheet is deployed so as to be pulled toward the vehicle front side. Therefore, the free end side of the deployment restriction seat is deployed in a state where it is pulled to the front side of the vehicle, and the head of the passenger in the passenger seat in contact with the deployment regulation seat is further tilted forward by the deployment regulation seat that is deployed. You will receive the force of direction.

  Thus, in the case where the head of the occupant at the OOP position is approaching the airbag, the airbag device described in Patent Document 1 makes it difficult to ensure the safety of the occupant with the airbag.

  The invention of the present application can solve the above-mentioned problems, in the case where a child seat is mounted on the passenger seat and also on the head of the passenger sitting in the passenger seat but in the OOP position. Even in such a case, the force in the direction of tilting the upper body of the occupant forward or backward can be reduced, and the force for rotating the child seat to the rear side of the vehicle can be reduced. An object of the present invention is to provide an airbag device capable of suppressing the popping-out force.

The object of the present invention can be achieved by the inventions described in claims 1 to 4.
That is, the present invention relates to an airbag device for a passenger seat in which a folded airbag is accommodated in an airbag storage case whose opening is closed by a cleavage door.
In the gap between the airbag storage case and the cleavage door and the airbag, a belt-like front flap and a belt-like rear flap that cover the airbag from above and deploy with the airbag are arranged, and the front flap is , One end is connected to the vehicle front mounting portion in the airbag storage case, the other end is formed as a free end, and extends from the vehicle front mounting portion side to the airbag inflating side. Arranged to cover the airbag,
One end of the rear flap is connected to a mounting portion on the rear side of the vehicle in the airbag storage case, and the other end portion is formed as a free end, and the airbag is bulged from the mounting portion on the rear side of the vehicle. The front flap and the rear flap are disposed so as to overlap each other on the inflation side of the airbag, and the front flap is disposed on the inflation side of the airbag. The main feature is that at least a part of is exposed to the cleavage door.

  Further, in the passenger seat airbag device of the present invention, the rear flap covers the inflation side of the airbag first, and then the rear flap part covering the inflation side of the airbag The main feature is that the front flap is covered.

Further, in the passenger seat airbag device of the present invention, an opening region is formed in the rear flap, and the front flap first covers the inflation side of the airbag, and then covers the inflation side of the airbag. The main feature is that the opening region is disposed at the portion of the front flap that is covered, and the rear flap is covered.

  Furthermore, the passenger seat airbag device of the present invention is mainly characterized in that the length dimension of the front flap is shorter than the length dimension of the rear flap.

  In the present invention, a front flap and a rear flap that are deployed by inflation of the airbag are provided, and each of the front flap and the rear flap that covers the airbag from above is formed in a strip-like long shape. The airbag is inflated with a front flap having one end fixed, and the airbag is inflated with a rear flap having one end fixed. In addition, on the bulging side of the airbag, the front flap and the rear flap are overlaid. In addition, at least a part of the front flap is arranged on the side of the airbag to be exposed on the side of the cleavage door.

  By configuring in this way, when the airbag device is inflated and deployed, the head of the occupant sitting on the passenger seat at the nearest OOP position with respect to the airbag device and the top of the child seat attached to the passenger seat are present. For the positional relationship, the front flap can first contact the occupant's head and child seat.

  That is, the front flap is interposed between the airbag that is inflated and deployed and the head or face of the occupant, or between the airbag that is inflated and deployed and the child seat. As the airbag is inflated, the front flap moves from the lower side to the upper side on the surface of the airbag on the inflation side, so that the occupant's head and child seat are affected by the inertial force at the time of collision. A forward tilting displacement can be suppressed.

  At this time, the airbag is inflated and deployed while receiving the resistance force from the front flap and the rear flap. And the pop-out force when the airbag is inflated and deployed can be attenuated by the front flap and the rear flap, and the impact from the airbag to the occupant can be mitigated.

  In this way, the front flap deployment direction is a direction that gives a rotational moment that tilts the occupant's head backward or a rotational moment that tilts the child seat backward, so the forward tilt moment that tilts forward due to the inertial force due to the impact of the vehicle collision. It is possible to suppress the forward leaning posture with respect to the occupant and child seat on which is acting. Further, in addition to the deployment direction of the front flap supported by the airbag that is inflated and deployed, the forwardly inclined posture of the occupant and the child seat can be suppressed by the airbag that is inflated and deployed.

  Although it is in the OOP position, the front flap does not contact the occupant's head or child seat for an arrangement relationship in which the occupant's head and the top of the child seat are in a position separated upward from the airbag device, After the free end of the front flap moves away from the position where it comes into contact with the passenger's head and child seat, the rear flap comes into contact with the passenger's head and child seat.

Then, the rear flap comes into contact with the occupant's head and child seat for the first time, and the rear flap moves from the upper side to the lower side along the air bag inflation side as the airbag inflates. It will be. Due to the movement of the rear flap, it is possible to suppress the occupant's head and child seat from being suddenly displaced rearward due to the inflation of the airbag.

  And by adjusting the length dimension of the front flap and the rear flap, the range of the occupant's head position where the displacement can be suppressed and the installation position of the child seat can be expanded. Thereby, the preferable expansion | deployment characteristic of an airbag can be set over a wide range.

  At this time, as the airbag, in particular, the airbag will be inflated and deployed while receiving the resistance force from the rear flap, and the jumping force when the airbag is inflated and deployed can be attenuated. From the airbag to the occupant and child seat Can reduce the impact.

  The front flap and the rear flap can be disposed so as to first cover the airbag folded by the rear flap, and then cover the airbag from above the rear flap by the front flap. On the contrary, the airbag folded first by the front flap may be covered first, and then the rear flap may be arranged to cover the airbag from above the front flap.

  In the case of a configuration in which the folded airbag is first covered with the front flap, the airbag's inflation side is covered so that the front flap portion covering the airbag's inflation side is exposed. It is necessary to form an opening region at the front flap portion.

  By configuring in this way, when the airbag device is inflated and deployed, the head of the occupant seated in the passenger seat at the nearest OOP position with respect to the airbag device and the top of the child seat attached to the passenger seat are present. In terms of arrangement, the front flap can first contact the occupant's head and child seat through the opening area of the rear flap, and the occupant's head and child seat can be moved by the movement of the front flap as the airbag inflates. The displacement which tries to incline forward can be suppressed.

  After the opening area of the rear flap is away from the position where it comes into contact with the passenger's head and child seat, the rear flap comes into contact with the passenger's head and child seat. And as above-mentioned, it can suppress that a passenger | crew's head and a child seat are rapidly displaced to the back side by expansion | swelling of an airbag by the surface movement of a rear flap.

  In this invention, the length dimension of a front flap can be comprised shorter than the length dimension of a rear flap. By comprising in this way, the period when a front flap contacts the head of the passenger | crew who seated in the passenger seat, or the top part of the child seat attached to the passenger seat can be comprised short.

  In addition, by adjusting the length of the front flap, the front flap comes into contact with the head of the occupant seated in the passenger seat at the nearest OOP position to the airbag device and the top of the child seat attached to the passenger seat. It is possible to adjust the period during which the front flap is in contact with the airbag since the airbag has started inflating and deploying.

  Since the present invention can be configured by additionally providing a front flap and a rear flap in the airbag, the complexity of the structure can be minimized and the manufacturing cost of the airbag device is extremely low. Become.

It is a principal part perspective view which shows the outline | summary of the arrangement structure of an airbag, a front flap, and a rear flap. Example 1 It is principal part sectional drawing explaining the outline of the airbag apparatus for passenger seats. Example 1 It is principal part sectional drawing explaining the outline | summary of the operation state of the front flap with respect to the passenger | crew's head in an OOP position, and a rear flap. Example 1 FIG. 3 is a cross-sectional view of a main part for explaining an outline of a state of Pos. (Explanation) It is principal part sectional drawing explaining the outline | summary of the operation state of a front flap and a rear flap. Example 1 It is a principal part perspective view which shows the outline | summary of the other arrangement structure of an airbag, a front flap, and a rear flap. (Example 2) It is principal part sectional drawing explaining the outline of the other airbag apparatus for passenger seats. (Example 2) It is principal part sectional drawing explaining the outline | summary of the other operation state of the front flap with respect to the passenger | crew's head in an OOP position, and a rear flap. (Example 2) It is a side view explaining the arrangement | positioning relationship between the airbag apparatus for passenger seats, and a child seat. (Conventional example) It is principal part sectional drawing explaining the operating condition of an expansion | deployment control sheet | seat. (Conventional example)

  Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings. As a configuration of the airbag device for the passenger seat according to the present invention, in addition to the shape and configuration described below, if the shape and configuration can solve the problems of the present invention, those shapes and configurations are adopted. It is something that can be done. For this reason, this invention is not limited to the Example demonstrated below, A various change is possible.

  As shown in FIG. 4, the front side of the passenger seat of the vehicle is made of polypropylene resin or the like that has improved impact resistance strength by adding talc or the like to the skin portion made of synthetic resin such as soft vinyl chloride resin. An instrument panel 5 including a base member (not shown) and a steering member or the like as a structural member (not shown) made of steel or the like is provided. A windshield 25 is disposed on the upper front side of the instrument panel 5. An opening is formed in the upper surface of the instrument panel 5, and the passenger seat airbag device 1 is accommodated in the opening.

  The passenger airbag device 1 is folded and stored in an airbag storage case 2, and the airbag storage case 2 is attached to a portion of the instrument panel 5 in front of the passenger seat of the vehicle. When a frontal collision of the vehicle or when a collision is predicted, an occupant riding on the rear side of the vehicle, that is, the passenger seat by gas injected from an inflator (not shown) (in FIG. 4, a dummy 20 is shown instead of the occupant) )) Is inflated and deployed so as to cover substantially the entire upper body of the occupant, and the upper body of the occupant can be restrained from the front.

  The opening portion of the airbag storage case 2 from which the inflated airbag (not shown) is inflated is closed by the cleavage door 3. The cleavage door 3 is attached to the instrument panel 5, and when the airbag 10 is inflated, a weak gland portion (not shown) formed in the cleavage door 3 is broken by the inflated airbag 10, and the cleavage door 3 is opened with double doors. Will open like so. Then, the airbag 10 bulges from the opening where the cleavage door 3 is opened.

  In the airbag storage case 2, a front flap 11 and a rear flap 12 surrounding the airbag 10 and the airbag 10 are stored. The front flap 11 and the rear flap 12 are shown in FIGS. 1 to 3 as will be described later.

The airbag 10 is connected to an inflator (not shown) attached to the bottom of the airbag storage case 2 via a gas inlet formed in the airbag 10. When the vehicle collides or when a collision is predicted, the airbag 10 can be inflated and deployed by gas injected from an inflator (not shown).

  In FIG. 1 and FIG. 2, the right side toward the page is the traveling direction that is the front of the vehicle, and the left side toward the page is the passenger seat side that is the rear direction of the vehicle. As shown in FIGS. 1 and 2, the airbag 10 is stored in the airbag storage case 2 in a folded state and with one end fixed in the airbag storage case 2.

  As shown in FIGS. 1 and 2, the airbag 10 is sequentially folded at folding points A to C, and from the first portion D and the folding point C folded inward from the folding point C. The air bag 10 is formed in a configuration having a second part E that is folded in communication with the bulging side 10a of the airbag 10. With the configuration having the first part D and the second part E, the front surface of the inflated airbag 10 can be formed as a bifurcated inflating surface, and the upper body of the passenger in the passenger seat is supported by a wide pressure receiving surface. Can do.

  The example of folding the airbag 10 shown in FIGS. 1 and 2 is an exemplification, and the airbag 10 according to the present invention is an airbag 10 configured to be folded by the folding method shown in FIGS. The present invention is not limited, and the present invention can be suitably applied to the airbag 10 folded by another known folding method.

  The front flap 11 is configured as a long belt-like body in which one end portion 11a is fixed to an attachment portion (not shown) in the front of the vehicle in the airbag storage case 2 and the other end portion 11b is configured as a free end. . The rear flap 12 is configured as a long belt-like body in which one end portion 12a is fixed to a mounting portion (not shown) at the rear of the vehicle in the airbag storage case 2 and the other end portion 12b is configured as a free end. . The extra length 12c at the other end 12b of the rear flap 12 is arranged in a folded state.

  The rear flap 12 with one end 12a fixed covers the bulging side 10a of the airbag 10 from the lower side to the upper side, and the one end 11a is fixed with the front flap 11 fixed in the airbag storage case 2. The ten bulging sides 10a are configured to cover from the upper side toward the lower side. The rear flap 12 covering the inflation side 10a of the airbag 10 is configured to cover the inflation side 10a of the airbag 10 by the front flap 11.

  That is, on the bulging side 10 a of the airbag 10, the front flap 11 and the rear flap 12 are superposed with the front flap 11 facing the back surface of the cleavage door 3.

  Further, the length dimension of the front flap 11 is configured to be shorter than the length dimension of the rear flap 12, and the extra length part on the other end 12b side of the rear flap 12 is folded in a zigzag shape, It is stored between the airbag 10 and the front flap 11. When the airbag is inflated and deployed, the extra length portion 12c of the rear flap 12 is sequentially extended while being accompanied by the inflation of the airbag 10.

  That is, as shown in FIG. 3, as the airbag 10 (see FIG. 2) is inflated and deployed, the extra length portion 12c (see FIG. 2) expands. In FIG. 3, illustration of the airbag 10 and the extra length portion 12c is omitted. Here, using FIG. 3 to FIG. 5, in the state where the head of the occupant in the OOP position (the dummy head 20 a is shown in FIG. 3) is approaching the passenger seat airbag device 1, The case where the airbag 10 is inflated and deployed will be described.

As shown in FIG. 4, there are two pattern positions as the occupant's head (hereinafter described using the dummy head 20a) in the OOP position is approaching the passenger airbag device 1. Can be set. The two pattern positions will be explained using test positions for forward collision safety conducted by the US Department of Transportation's Road Traffic Safety Administration (NHTSA).

That is, as shown in FIG. 4, as the two pattern positions, the dummy 20 is bent slightly forward from the normal boarding position, but the dummy head 20a is separated from the passenger seat airbag device 1 in the position 1 ( The position is abbreviated as “Pos.1.” And the position of the position 2 (abbreviated as “Pos.2”) where the dummy head 20a contacts the airbag device 1 for the passenger seat.
3 to 5, the right side toward the paper surface is the vehicle front side, and the left side toward the paper surface is the passenger seat side.

  As shown in FIG. 3, as the airbag 10 (not shown) is inflated and deployed, the front flap 11 is sequentially extended toward the front side of the vehicle while being accompanied by the inflation of the airbag 10. That is, the front flap 11 is interposed between the airbag 10 (not shown) that is inflated and deployed and the dummy head 20a that is located at the position Pos.2.

  As the airbag 10 inflates, the front flap 11 moves on the surface of the airbag 10 on the inflation side 10a (see FIG. 2) from the lower side to the upper side as indicated by the arrow I. Become. As a result, the displacement of the dummy head 20a that tends to tilt forward due to the inertial force at the time of the collision can be suppressed by the front flap 11 that moves in a direction that prevents forward tilt.

  The backward tilting moment acting on the dummy head 20a from the front flap 11 in the direction of the arrow I can counteract the forward tilting moment that causes the dummy 20 and the dummy head 20a to tilt forward. Then, the dummy 20 can be used as a foothold for returning to the backrest side of the passenger seat. Moreover, the dummy 20 can be returned to the backrest side of the passenger seat without damaging the dummy 20 while resisting the inertial force that causes the dummy 20 to be directed in the forward direction of the vehicle.

  In particular, since the front flap 11 moves in a plane between the dummy head 20a and the airbag 10 that is inflated and deployed, it is possible to prevent the dummy 20 from receiving the inflation force of the airbag 10 directly. This can be prevented by the flap 11. And the impact from the airbag 10 with respect to the dummy 20 can be relieved. Moreover, the airbag 10 can be smoothly inflated and deployed while receiving a frictional force with the front flap 11.

  In addition, after the extra length of the front flap 11 is pulled out sequentially and the restriction on the inflation of the airbag 10 by the front flap 11 is released, the restriction on the inflation of the airbag 10 by the rear flap 12 is performed. Therefore, the rearward displacement of the dummy 20 that is displaced rearward by the airbag 10 can be suppressed by the rear flap 12 this time.

  After the surplus length portion 12c of the rear flap 12 is pulled out sequentially and the restriction on the inflation of the airbag 10 by the rear flap 12 is released, the dummy 20 is in the normal sitting position with respect to the dummy 20 Thus, the airbag 10 can be directly applied to the dummy 20 in substantially the same manner as the airbag 10 operates.

  In other words, the force with which the airbag 10 inflates from the airbag storage case 2 can be attenuated by the restriction on the inflation of the airbag 10 by the front flap 11 and the rear flap 12 while the airbag 10 is inflated and deployed. it can. When the airbag 10 is inflated to a predetermined shape or more, the airbag 10 can be inflated without being restricted by the front flap 11 and the rear flap 12. The airbag 10 can be provided with a vent hole for exhausting excess inflation gas when the airbag 10 is inflated.

  Next, since the rear flap 12 is first brought into contact with the dummy head 20a located at the Pos.1 position when the airbag 10 (not shown) starts inflating and deploying, the airbag 10 is being pulled by the inflation of the airbag 10. The length dimension of the front flap 11 that sequentially extends toward the front side of the vehicle can be set to a length dimension that does not contact the dummy head 20a at the Pos.1 position. By setting the length dimension of the front flap 11 in this way, the front flap 11 can be configured not to contact the dummy head 20a located at the Pos.1 position.

  Then, the rear flap 12 that sequentially extends from the front side to the rear side of the vehicle while being pulled by the inflation of the airbag 10 can be brought into contact with the dummy head 20a that was initially at the Pos.1 position. . As the airbag 10 is inflated, the rear flap 12 moves from the upper side to the lower side on the bulging side surface of the airbag 10 as indicated by arrow II. Since the rear flap 12 moves in the direction of the arrow II, it is possible to suppress a sudden rearward displacement of the dummy 20 that is displaced rearward by the airbag 10 in contact with the dummy 20. it can.

  Then, when the rear flap 12 moves in the direction of the arrow II, a forward tilting moment is applied to the dummy 20 on which the backward tilting moment is applied by the pressing force of the airbag 10 that is inflated and deployed. be able to. The dummy 20 can be returned to the backrest side without damaging the dummy 20 while weakening the force with which the dummy 20 is suddenly pressed against the backrest side of the seat.

  In this manner, the dummy 20 can be returned to the normal seating posture while alleviating the impact from the airbag 10 on the dummy 20. The airbag 10 can be smoothly inflated and deployed while receiving a frictional force with the rear flap 12.

  In addition, since the rear flap 12 sequentially draws the extra length portion 12c on the other end portion 12b side, it is possible to continue to restrict the inflation of the airbag 10 by the rear flap 12. Then, after the restriction on the inflation of the airbag 10 by the rear flap 12 is released, when the dummy 20 is sitting at the normal seating position, it is substantially the same as the airbag 10 acting on the dummy 20. As described above, the airbag 10 can be directly applied to the dummy 20.

  Thus, while the airbag 10 is in contact with the dummy 20 at the Pos.2 position and the front flap 11 is in contact with the dummy head 20a, the airbag 10 receives the resistance force from the front flap 11. Will expand and expand. Further, the airbag 10 is inflated and deployed while receiving the resistance force from the front flap 11 and the rear flap 12 until the airbag 10 abuts against the dummy head 20a located at the Pos.1 position. . While the rear flap 12 is in contact with the dummy head 20a, the airbag 10 is inflated and deployed while receiving the resistance force from the rear flap 12.

  Thereby, the popping-out force when the airbag 10 is inflated and deployed can be attenuated, and the impact from the airbag 10 on the dummy 20 can be reduced. Moreover, by adjusting the length dimension of the front flap 11 and rear flap 12, the position of the dummy head 20a that can suppress displacement, that is, the range of Pos.2 and Pos.1 is set over a wide range. can do. In addition, a preferable inflating and deploying characteristic of the airbag 10 can be set over a wide range.

In the above description, the dummy seat 20a is operated when the dummy head 20a is located at the Pos.1 position and the Pos.2 position with reference to FIGS. The configuration capable of reducing the impact from the airbag 10 on the head 20a has been described. However, even if there is a backrest part of the child seat at the position of the dummy head 20a, it is suitable for the child seat attached to the passenger seat as well as reducing the impact of the airbag 10 on the dummy head 20a Can act on.

  The members constituting the airbag 10, the front flap 11 and the rear flap 12 can be constituted by members having the same material, or can be constituted by members of different materials. With this configuration, the friction coefficient between the airbag 10 and the front flap 11 and the rear flap 12 can be kept constant, and the airbag 10 can be smoothly deployed.

  According to the present invention, when the passenger airbag device 1 is inflated and deployed, the Pos. For an arrangement in which the child seat attached to the occupant's head or the passenger seat is located at two positions, the front flap 11 can first contact the occupant's head or child seat. As the airbag is inflated, the front flap 11 moves along the upper side of the airbag on the inflation side, so that the head of the occupant and the child seat lean forward due to the inertial force at the time of collision. The displacement which is doing can be suppressed.

  In addition, the rear flap 12 can first come into contact with the passenger's head and child seat for positions where there is a passenger seat on the passenger seat at the Pos.1 position and the top of the child seat attached to the passenger seat. . As the airbag 10 is inflated, the rear flap 12 moves from the upper side to the lower side on the surface of the airbag on the inflation side, so that the occupant's head and child seat are inflated and deployed. Displacement that rapidly tilts backward by the airbag 10 that is present can be suppressed.

  Moreover, the jumping force when the airbag 10 is inflated and deployed can be attenuated by the front flap 11 and the rear flap 12, and the impact from the airbag 10 on the occupant can be mitigated.

  The configuration of the second embodiment according to the present invention will be described with reference to FIGS. In the second embodiment, the order of the front flap 21 and the rear flap 22 that covers the inflation side 10a of the airbag 10 is the reverse order of the first embodiment. Then, the order of the front flap 21 and the rear flap 22 covering the bulging side 10a of the airbag 10 is reversed to that in the case of the first embodiment, so that the bulging side 10a of the airbag 10 is covered. An opening region 23 for exposing the front flap 21 is formed at the rear flap 22 portion.

  In this configuration, the configuration of the second embodiment is different from the configuration of the first embodiment, but the other configurations are the same as those of the first embodiment. Therefore, about the structure similar to the structure in Example 1, the description about the member is abbreviate | omitted by using the member code | symbol used in Example 1. FIG.

  As shown in FIGS. 6 and 7, the front flap 21 having one end 21 a fixed thereto covers the bulging side 10 a of the airbag 10 from the upper side to the lower side, and the one end 22 a in the airbag storage case 2. A rear flap 21 fixed to the airbag 10 covers the bulging side 10a of the airbag 10 from the lower side toward the upper side.

  The rear flap 22 covers the inflation side 10a of the airbag 10 from the front flap 21 that covers the inflation side 10a of the airbag 10. The extra length portion 22c in the rear flap 22 is folded in a zigzag shape and stored between the front flap 21 and the airbag storage case 2 (see FIG. 4).

  Further, as described in the first embodiment, when the airbag 10 starts to be inflated and deployed with respect to the dummy head 20a located at the Pos.2 position, the front flap 21 passes through the opening area 23 of the rear flap 22. Thus, it is interposed between the airbag 10 that is inflated and deployed and the dummy head 20a located at the position Pos.2.

  As the airbag 10 is inflated, the front flap 21 moves on the surface of the airbag 10 on the inflation side 10a (see FIG. 2) from the lower side to the upper side as indicated by the arrow I. Become. Thereby, the displacement of the dummy head 20a that tends to tilt forward due to the inertial force at the time of the collision can be suppressed by the front flap 21 exposed through the opening region 23.

  When the airbag 10 starts inflating and deploying, the rear flap 12 can be brought into contact with the dummy head 20a located at the position Pos.1 shown in FIG. Therefore, the formation region of the opening region 23 and the length dimension of the front flap 11 can be adjusted. By adjusting the formation area of the opening area 23 and the length dimension of the front flap 11, when the rear flap 12 comes into contact with the dummy head 20a at the Pos.1 position, the opening area 23 is set to the Pos.1 position. The front flap 21 can be moved to a position where it does not contact the dummy head 20a or the front flap 21 can be moved from the opening area 23 to a position where the front flap 21 is not exposed.

  Then, the rear flap 22 that is sequentially extended from the front side of the vehicle to the rear side while being inflated by the inflation of the airbag 10 can be brought into contact with the dummy head 20a that was initially at the Pos.1 position. it can. As the airbag 10 is inflated, the rear flap 22 moves from the upper side to the lower side as indicated by the arrow II on the surface of the airbag 10 on the bulging side as shown in FIG. Since the rear flap 22 moves in the direction of the arrow II, the rear flap 22 suppresses a sudden rearward displacement with respect to the dummy 20 that is displaced rearward by the airbag 10 in contact with the dummy 20. can do.

  The pop-out force when the airbag 10 is inflated and deployed can be attenuated by the front flap 21 and the rear flap 22, and the impact from the airbag 10 on the dummy 20 can be reduced. Moreover, by adjusting the length dimension of the front flap 21 and the rear flap 22 and the position and size of the opening region 23 formed in the rear flap 22, the position of the dummy head 20a that can suppress displacement, i.e., Pos. Range and Pos.1 range can be set over a wide range. In addition, a preferable inflating and deploying characteristic of the airbag 10 can be set over a wide range.

  As described in the first embodiment, even in the second embodiment, the front flap 21 and the rear flap 22 can be suitably applied to the passenger seat and the child seat.

  The present invention can be suitably applied to a passenger seat airbag device.

DESCRIPTION OF SYMBOLS 1 ... Airbag apparatus for passenger seats, 2 ... Airbag storage case, 10 ... Airbag, 11 ... Front flap, 12 ... Rear flap, 15 ... Opening area, 20 ..Dummy, 20a ... dummy head, 21 ... front flap, 22 ... rear flap, 23 ... opening area, 50 ... dashboard, 53 ... airbag device for passenger seat 54 ... Passenger seat, 55 ... Child seat, 56 ... Backrest, 58 ... Air bag, 60 ... Deployment restriction seat.

Claims (4)

In the airbag device for the passenger seat that accommodates the folded airbag in the airbag storage case whose opening is closed by the cleavage door,
In the gap between the airbag storage case and the cleavage door and the airbag, a belt-shaped front flap and a belt-shaped rear flap that cover the airbag from above and deploy with the airbag are arranged,
One end portion of the front flap is connected to a mounting portion in front of the vehicle in the airbag storage case, and the other end portion is formed as a free end, and the airbag is bulged from the mounting portion side in front of the vehicle. It is arranged in a form covering the airbag over
One end of the rear flap is connected to a mounting portion on the rear side of the vehicle in the airbag storage case, and the other end portion is formed as a free end, and the airbag is bulged from the mounting portion on the rear side of the vehicle. It is arranged in a form covering the airbag over
The front flap and the rear flap are arranged to overlap each other on the inflation side of the airbag, and at least a part of the front flap is exposed to the cleavage door side on the inflation side of the airbag. An airbag device for a passenger seat, characterized in that   The front flap covers a portion of the rear flap covering the inflation side of the airbag first, and then covering the inflation side of the airbag. The airbag device for a passenger seat according to 1. An opening region is formed in the rear flap,
The front flap covers the bulging side of the airbag first, and then the opening region is disposed at the front flap portion covering the bulging side of the airbag, and the rear flap covers the airbag. The airbag device for a passenger seat according to claim 1, wherein:   The front-seat airbag apparatus according to any one of claims 1 to 3, wherein a length dimension of the front flap is configured to be shorter than a length dimension of the rear flap.

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