JP2008222083A - Airbag device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an airbag device for a vehicle capable of suitably adjusting a form of a recessed portion, and reducing an injury value by suitably receiving an occupant including a head portion according to, for example, a wearing/non-wearing state of a seat belt or a seat slide position. <P>SOLUTION: The airbag device for the vehicle comprises an airbag body 1 wherein a front surface becomes an occupant restraining surface X, a recessed portion Y formed on the airbag main body so as to be positioned at a lateral direction center portion of the occupant restraining surface, route portions 10 formed on right and left side surfaces of the airbag body so as to be positioned at a slanting rear side of the recessed portion, and a rear end portion 20 extended to the rear side of the airbag body through front end portions 17 joined around the recessed portion and the route portions 10 to be supported. The airbag device for the vehicle is provided with a tension transmitting member 14 towing the recessed portion by tension generated between the front end portion and the rear end portion by deploying/expanding action of the airbag body, and a recessed portion form adjusting means 13 provided on a vehicle body side, and adjusting depression amount of the recessed portion by adjusting a distance between the rear end portion and the front end portion while supporting the rear end portion of the tension transmitting member. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention can appropriately adjust the shape of the recess, for example, according to the wearing / non-wearing state of the seat belt and the seat slide position, appropriately receiving the occupant including the head and reducing the injury value. The present invention relates to a vehicle airbag apparatus.

Conventionally, as a so-called omni-shaped airbag in which an occupant restraining surface is formed with a recess to receive the occupant's head and the occupant's shoulder is received with a protruding portion that protrudes on both right and left sides of the recess. It has been known. In this patent document 1, an airbag, a tether, and a winding device are included, and the airbag is formed between an inner airbag member, an outer airbag member, and the inner airbag member and the outer airbag member. And the tether is connected to at least one of the inner airbag member and the outer airbag member, and the winding device is connected to the tether and is wound when the airbag is in a deployed state. The device is adapted to adjust the size and shape of the airbag.
JP 2006-232267 A

  In an omni-shaped airbag, it is necessary to consider the position and form of the recess. For example, considering the seat belt wearing state and the non-wearing state, if there is a recess in the seat belt wearing state, the time for receiving the head is delayed and the injury value increases. On the other hand, if there is no recess when the seat belt is not worn, the head may collide strongly with the front surface of the airbag, resulting in an increase in injury value. That is, the recess is not necessary when the seat belt is worn, but the recess functions effectively when the seat belt is not worn.

  Looking at the seat slide position, if there is a recess when the seat position is on the rear side of the vehicle, the time to receive the head will be delayed, on the other hand, if there is no recess when the seat position is on the front side of the vehicle, There is a risk that the head will collide strongly, and in any case the injury value will rise. Accordingly, with respect to the seat slide position, it is preferable that there is no recess when the seat position is on the vehicle rear side, and it is suitable for occupant protection to form the recess when the seat position is on the vehicle front side.

  In the background art, the winding device is disposed at the rear portion of the airbag, the tether is disposed in the front-rear direction from the winding device toward the front end of the airbag, and is stretched by the deployment and inflation action of the airbag. Although the length of the tether to be adjusted is adjusted by the winding device, in such a configuration, the airbag is tensioned only in the front-rear direction, and there is a problem that the airbag tends to inflate in the left-right width direction. At the same time, it was difficult to properly control the concave portion responsible for restraining the passenger's head.

  The present invention was devised in view of the above-described conventional problems, and it is possible to appropriately adjust the shape of the recess, for example, depending on the wearing / non-wearing state of the seat belt and the seat slide position. It is an object of the present invention to provide an airbag device for a vehicle that can appropriately receive an occupant and reduce an injury value.

  An air bag device for a vehicle according to the present invention is formed by being deployed and inflated with an inflator gas, the front surface of which is an occupant restraint surface, and the airbag body positioned at the center in the left-right direction of the occupant restraint surface. And a pair of left and right vias formed on the left and right side surfaces of the airbag main body at an obliquely rear side of the recess, a front end portion joined to the periphery of the recess, and the via portion. A rear end portion that is extended to and supported by the rear side of the airbag body, and a tension generated between the front end portion and the rear end portion due to the deployment and expansion action of the airbag body. A pair of left and right tension transmission members that pull the recess backward, and a rear end portion of each tension transmission member that is provided on the vehicle body side and adjusts the distance between the rear end portion and the front end portion. And a recess shape adjusting means for adjusting the amount of depression of the recess. And said that there were pictures.

  In the present invention, the `` front '' and `` rear '' directions with respect to the airbag, instrument panel, steering wheel, and the periphery thereof are directions that are relatively on the front side when viewed from the passenger seated in the driver seat or the passenger seat. The direction that moves away in the opposite direction is “back”. Terms that use “front” and “rear” as prefixes for airbags, instrument panels, steering wheels and their peripheries also follow this definition. Regarding the “left / right” direction, the right hand direction is “right” and the left hand direction is “left” as viewed from the occupant.

  Note that terms such as front seats and rear seats of general vehicles called from the context of the vehicle itself are the definition of the context of the airbag, instrument panel, steering wheel, and the surrounding area of the present invention. The reverse is true. In the present specification, the front seat (front seat) / rear seat (rear seat) of the vehicle, the front of the vehicle, the rear of the vehicle, etc., except for the airbag, the instrument panel, the steering wheel and the peripheral portion of the present invention. The name given from the general context of the vehicle itself is used as it is.

  It is preferable that guide members for slidably guiding the tension transmitting member are provided on the left and right side surfaces of the airbag body from the transit portion to the rear side of the airbag body along the side.

  The via portion is a hole through which the tension transmitting member penetrates from the inside of the airbag body to the outside, and the tension transmitting member is disposed inside the airbag body and has a front end portion around the recess. It is desirable that the belt-shaped first transmission member to be joined with the second transmission member disposed outside the airbag body and supported by the recess shape adjusting means.

  The vehicle airbag device according to the present invention includes an airbag body that is deployed and inflated with an inflator gas and has a front surface serving as an occupant restraint surface, and left and right sides of the airbag body. A pair of left and right vias formed obliquely rearward from the periphery of the central part, a front end part joined to the periphery of the central part in the left and right direction of the occupant restraint surface of the airbag body, and the via part The rear end of the airbag body is supported by being extended to the rear side, and the occupant is restrained by the tension generated between the front end and the rear end by the deployment and inflation of the airbag body. A pair of left and right tension transmission members that pull the surface rearward to form a recess in the occupant restraint surface, and the rear end portion and the front end portion provided on the vehicle body side, supporting the rear end portion of each tension transmission member By adjusting the distance between and Characterized in that a recess forms adjustment means for adjusting the.

  It is preferable that guide members for slidably guiding the tension transmitting member are provided on the left and right side surfaces of the airbag body from the transit portion to the rear side of the airbag body along the side.

  The via portion is a hole through which the tension transmitting member penetrates from the inside to the outside of the airbag main body, and the tension transmitting member is disposed inside the airbag main body and is provided on the left and right sides of the occupant restraint surface. A belt-shaped first transmission member whose front end is joined to the periphery of the center in the direction and a second transmission member disposed outside the airbag body and supported by the recess shape adjusting means are connected to each other. It is desirable.

  The tension transmitting member may be disposed inside the airbag body.

  A seat belt wearing sensor that detects a seat belt wearing / non-wearing state and outputs a detection signal to the recessed portion shape adjusting means, the recessed portion shape adjusting means being in a non-wearing state rather than a seat belt wearing state, The distance between the tension supporting end portion and the joining end portion of the transmission member is adjusted to be long.

  A seat slide position sensor that detects a seat slide position and outputs a detection signal to the recess configuration adjusting means, and the recess configuration adjusting means detects the position of the vehicle front side when the seat slide position is the vehicle rear side position; The distance between the tension supporting end of the tension transmitting member and the joining end is adjusted to be longer than the case.

  In the vehicle airbag device according to the present invention, the shape of the concave portion can be adjusted appropriately. For example, the occupant including the head is appropriately selected according to the wearing / non-wearing state of the seat belt and the seat slide position. The injury value can be reduced.

  Hereinafter, an example of a preferred embodiment of a vehicle airbag device according to the present invention will be described in detail with reference to the accompanying drawings. 1 to 4 show a deployed and inflated state of the airbag main body 1 provided in the vehicle airbag apparatus according to the present embodiment. The airbag main body 1 is folded and stored inside the instrument panel on the front of the passenger seat or inside the horn button of the driver seat. You may arrange | position in the suitable location ahead of a vehicle seeing from the said passenger | crew for the passenger | crew of a backseat seat.

  The airbag body 1 is formed in a bag shape having a rear opening 4 from a pair of left and right side sheet materials 2 and a pair of left and right center sheet materials 3 disposed between the side sheet materials 2. These sheet materials 2 and 3 are formed of a known material applied to an airbag. The pair of left and right central sheet members 3 are each formed in a long belt shape that is folded back in a U shape on the front surface (side facing the occupant) of the airbag body 1. These center sheet materials 3 are formed wide by joining adjacent center side edges by sewing 6 or the like via a joint allowance 5, and roughly form the upper surface, front surface and lower surface of the airbag body 1. Each of the side sheet materials 2 is joined to the outer edge of each central sheet material 3 by sewing 7 or the like, and roughly forms the left and right side surfaces of the airbag body 1. When the airbag body 1 is deployed and inflated with an inflator gas filled inside, the front surface forms an occupant restraint surface X.

  In the joining allowance 5 of the pair of left and right central sheet members 3, a recessed portion forming joint portion 8 is set in which the joining position (sewing position in the case of sewing) of these central sheet members 3 is partially shifted rearward. Due to the connecting portion 8, a recessed portion Y that is recessed in the inner direction of the airbag body 1 is formed at the center in the left-right direction of the passenger restraint surface X of the airbag body 1. In the illustrated example, the joining position (sewing 6) is set forward in the lower half and upper end of the occupant restraint surface X of the airbag body 1, and a recess is formed between the lower half and the upper end. A joining portion 8 is formed, and a recess Y is formed in approximately the upper half of the front surface of the airbag body 1.

  Exhaust ports 9 are formed in the left and right side sheet materials 2 toward the front surface of the airbag body 1. In addition, a pair of left and right holes 10 a that serve as the via portions 10 are formed in the side surface sheet materials 2 at positions that are obliquely rearward from the recesses Y. In the example of illustration, the hole 10a is formed in one set up and down. The rear opening 4 of the airbag body 1 is closed and a housing 11 fixed to the vehicle body side is attached. The housing 11 is provided with an inflator 12 for injecting inflator gas into the airbag body 1 and a recessed portion shape adjusting means 13 to be described later.

  In the vehicle airbag device according to the present embodiment, a pair of right and left tension transmission members 14 are provided from the recess Y side on the front surface of the airbag body 1 to the recess shape adjusting means 13 side on the rear of the airbag body 1. In the present embodiment, each tension transmission member 14 is configured by connecting a belt-like first transmission member 15 and a string-like second transmission member 16 in series. Of course, the tension transmission member 14 may be formed of a single member without being divided into the first and second transmission members 15 and 16.

  The belt-shaped first transmission member 15 is formed of a foldable and flexible material such as cloth. The pair of left and right first transmission members 15 are arranged in a V shape so as to be stretched between the recessed portion Y and the pair of left and right holes 10a in the airbag body 1. Both the front end portions 17 of the first transmission members 15 are joined to the joining margin 5 around the recess Y where the recess forming joint 8 is set by sewing or the like. A loop portion 19 that forms the insertion hole 18 by folding is formed at the rear end portion of the first transmission member 15.

  The string-like second transmission member 16 is formed of a foldable and flexible material and is provided outside the airbag body 1. The pair of left and right second transmission members 16 are respectively disposed from the hole 10a toward the housing 11 along the surface of each side sheet material 2 so as to sandwich the airbag body 1 from both the left and right sides. The front end portion of the second transmission member 16 is connected to the rear end portion of the first transmission member 15. In the present embodiment example, the second transmission member 16 is inserted into the airbag body 1 through one pair of upper and lower holes 10a, inserted into the insertion hole 18 of the loop part 19, and the other hole part. It is pulled out of the airbag body 1 from 10a and thereby connected to the first transmission member 15. The hole diameter of the hole portion 10a is formed to a minimum size that allows the second transmission member 16 to penetrate so that the inflator gas does not leak unnecessarily. The rear end portion 20 of the second transmission member 16 is supported by the recess shape adjusting means 13.

  When the airbag body 1 is deployed and inflated, the recess forming joint 8 and the front end portion 17 of the first transmission member 15 move forward, whereby the first transmission member 15 is pulled forward. Since the rear end portion 20 of the second transmission member 16 is supported by the recess shape adjusting means 13 at the rear portion of the airbag body 1, the first transmission member 15 extends from the second transmission member 16 stretched as the via portion 10 through the hole 10 a. The tension is transmitted to the tension transmitting member 14 by the expansion and expansion action of the airbag body 1. As a result, a tension that pulls the recess Y backward acts on the recess forming joint 8 that moves forward, and as a result, on the front surface of the airbag body 1 that is deployed forward without being restrained by the tension transmitting member 14. On the other hand, the concave portion Y is formed in a definite manner.

  The pair of left and right side sheet materials 2 are each provided with a guide member 21 along the side surface of the airbag body 1 from the hole 10a toward the housing 11 on the rear side of the airbag body 1. These guide members 21 are formed of a foldable and flexible material such as cloth. These guide members 21 have both edges joined to the side sheet material 2 by sewing or the like along the length direction, so that the second transmission member 16 is slidably guided between the guide member 21 and the side sheet material 2. A guide hole 22 is formed.

  The recess shape adjusting means 13 that supports the rear end portion 20 of the second transmission member 16 of each tension transmission member 14 is attached to the vehicle body side via the housing 11. The recess shape adjusting means 13 adjusts the distance between the rear end portion 20 and the front end portion 17 of the tension transmitting member 14 to adjust the amount of depression of the recess Y.

  As shown in FIGS. 5 to 8, the recess shape adjusting means 13 includes a holder 25 fixed to a frame 23 fixed to the housing 11 with a bolt 24, and a bush 26 between the holder 25 and the frame 23. A pulley 27 that is rotatably supported and on which the rear end 20 of the second transmission member 16 is wound, and between the pulley 27 and the holder 25, one end is locked to the pulley 27 and the other end is locked to the holder 25. Provided, and a torsion coil spring 28 that urges the pulley 27 to rotate in the extending direction of the second transmission member 16, a cylinder portion 29 formed in the holder 25, and a piston 30 slidably provided in the cylinder portion 29. And is formed on the piston 30 and removably engaged with an engagement recess 31 formed on the pulley 27 to stop the pulley 27 from rotating. 27 is a high pressure gas that is provided in the cylinder portion 29 so as to face the piston 30 and moves the piston 30 in a direction in which the engagement convex portion 32 separates from the engagement recess 31. Is mainly composed of a micro gas generator 33 that ejects the gas into the cylinder portion 29. The piston 30 is preferably provided with an annular seal ring 34 in order to ensure sealing performance with the inner surface of the cylinder portion 29. The micro gas generator 33 is attached and fixed to the holder 25 with a cap 35.

  The distance between the rear end portion 20 and the front end portion 17 of the tension transmission member 14 is adjusted by changing the winding length of the second transmission member 16 around the pulley 27. As shown in FIGS. 6A to 6D, when the micro gas generator 33 is not operated, the engagement convex portion 32 is engaged with the engagement concave portion 31, the rotation of the pulley 27 is restricted, and the second transmission is performed. The rear end portion 20 of the member 16 is supported by being wound around a pulley 27. When the micro gas generator 33 is actuated, the engagement convex portion 32 is detached from the engagement concave portion 31 and the pulley 27 is allowed to rotate. At this time, the urging force of the torsion coil spring 28 is combined with the second transmission member. 16 is fed out from the pulley 27.

  When the rear end portion 20 of the second transmission member 16 is fixed to the pulley 27, the tension transmission member 14 is supported by the pulley 27. In some cases, the second transmission member 16 is released from the pulley 27, and the rear end portion 20 of the tension transmission member 14 is supported by the frame 23. In this case, the rear end portions 20 of the pair of left and right second transmission members 16 are connected to each other, and the tension transmission member 14 is configured as a series of single members and is supported by being locked to the frame 23. . In any case, when the tension transmission member 14 including the second transmission member 16 is wound around the pulley 27, the distance between the rear end portion 20 and the front end portion 17 is adjusted to be short, and the airbag body While the concave portion Y that is definitely deeply recessed with respect to the front surface is formed, the distance is adjusted to be long when the pulley 27 is extended from the pulley 27, and the concave portion Y that is shallowly recessed is determined on the front surface of the airbag body 1. To form.

  As shown in FIG. 3, the recess shape adjusting means 13 is provided with a control unit 13a for controlling the operation of the micro gas generator 33. The inflator 12 and the seat belt wearing sensor 36 are connected to the control unit 13a. The The seat belt wearing sensor 36 has a well-known configuration, detects whether the seat belt is worn or not, and outputs a detection signal to the control unit 13a. The control unit 13a detects the operation of the inflator 12. The control unit 13a monitors the operating state of the inflator 12, and activates the microgenerator 33 when worn according to the detection signal from the seat belt wearing sensor 36, while preventing the microgas generator 33 from being activated when not worn. Composed.

  Next, the operation of the vehicle airbag apparatus according to this embodiment will be described. FIG. 9 shows a control flow. When the ignition key is turned on, the control unit 13a starts monitoring the inflator 12 and the seat belt wearing sensor 36, and repeats the monitoring until the ignition key is turned off. The control unit 13a does not operate the micro gas generator 33 as long as a detection signal indicating that the seat belt is not worn is input.

  Even if the inflator 12 is actuated in a state where the seat belt is not worn, the pulley 27 of the recess shape adjusting means 13 is maintained in the rotation restricted state, so that the tension transmitting member 14 is not drawn out from the pulley 27, and the front end 17 and The distance from the rear end 20 is adjusted to be short. Thereby, in the passenger | crew restraint surface X of the airbag main body 1, with respect to the airbag main body 1 front surface expand | deployed ahead without restraint by the tension transmission member 14, it dents deeply and the recessed part Y is formed. An occupant not wearing a seat belt has a head that moves forward ahead of the chest wrapped in the recess Y, and the occupant restraint surface X around the recess Y advances toward the occupant. The chest is received, and thereby the injury value received by the occupant not wearing the seat belt can be appropriately reduced.

  On the other hand, when the detection signal of the wearing state is input from the seat belt wearing sensor 36 to the control unit 13a, the control unit 13a monitors the operation / non-operation of the inflator 12, and when the inflator 12 is operated, the micro gas generator 33 is operated. Is activated. When the micro gas generator 33 is operated, the pulley 27 is allowed to rotate, and the tension transmitting member 14 is fed out from the recess shape adjusting means 13 in combination with the biasing action of the torsion coil spring 28, thereby transmitting the tension. The distance between the front end portion 17 and the rear end portion 20 of the member 14 is adjusted to be long. The occupant restraint surface X of the airbag body 1 receives the pulling action of the tension transmission member 14 as shown by a two-dot chain line Z in FIG. 3 with respect to the front surface of the airbag body 1 that is deployed forward without restraint by the tension transmission member 14. However, the concave portion Y is formed with a definitely shallow depth. The occupant wearing the seatbelt receives the chest at the occupant restraining surface X around the recess Y at the same time as the head is received by the shallow recess D, and the injury value received by the occupant wearing the seatbelt. Can be appropriately reduced.

  In the vehicle airbag apparatus according to the present embodiment, a pair of right and left tension transmission members 14 are provided from the recess Y of the passenger restraint surface X to the recess configuration adjusting means 13 provided on the vehicle body side via the transit portion 10. Since the recess shape adjusting means 13 adjusts the distance between the front end portion 17 and the rear end portion 20 of the tension transmitting member 14 to adjust the amount of depression of the recess Y, the via portion 10 transmits the tension. The tension generated in the member 14 can ensure the pulling action of the recess Y and the shape restricting action of the airbag body 1 in the left-right direction, while appropriately expanding and inflating the airbag body 1 toward the occupant. The amount of depression of Y can be adjusted decisively, and the passenger can be protected appropriately.

  Since the guide member 21 is provided, it is possible to appropriately ensure the shape restricting action of the airbag body 1 in the left-right direction by the tension transmission member 14. Since the 1st transmission member 15 joined to the junction part 8 for recessed formation is formed in the strip | belt shape which has a considerable width dimension, the recessed part Y can be pulled reliably and the amount of depressions can be adjusted appropriately. Since the insertion hole 18 is formed in the belt-like first transmission member 15 by the loop portion 19, the string-like second transmission member 16 can be easily and reliably connected to the first transmission member 15.

  FIG. 10 shows a modification of the above embodiment. In this modification, instead of the case where the recess shape adjusting means 13 is operated in correspondence with the wearing / non-wearing state of the seat belt, the case in which the operation is performed in accordance with the seat slide position is shown. The recess shape adjusting means 13 is composed of a casing 37 fixed to the housing 11, a hole 38 provided in the casing 37, and a well-known restricting means 39 for reducing the diameter of the hole 38 to an appropriate size. . The rear end portion 20 of the second transmission member 16 is provided with a plurality of first, second, and third spheres 40a, 40b, and 40c in the illustrated example at intervals in the length direction. It is done. The outer diameter of each of the spheres 40a, 40b, and 40c is set to increase sequentially from the side closer to the hole 38 toward the side farther away. The rear end portion 20 of the second transmission member 16 is supported by the recess shape adjusting means 13 by these spheres 40a, 40b, and 40c. By changing the diameter of the hole 38 by the throttle means 39, the removal of each sphere 40a, 40b, 40c from the casing 37 is adjusted.

  The recess shape adjusting means 13 is provided with a control portion 13a for controlling the operation of the aperture means 39, and the inflator 12 and the seat slide position sensor 41 are connected to the control portion 13a. The seat slide position sensor 41 has a well-known configuration, detects the front / rear slide position of the seat, and outputs a detection signal to the control unit 13a. The control unit 13a detects the operation of the inflator 12. The control unit 13a monitors the state of the inflator 12, and expands or contracts the aperture of the hole 38 by the throttle unit 39 according to the detection signal from the seat slide position sensor 41.

  The seat slide position sensor 41 detects, for example, three seat slide positions of a front position, an intermediate position, and a rear position with respect to the front-rear direction of the vehicle, and outputs a detection signal thereof. When the seat slide position is the front side position of the vehicle, the control unit 13a controls the throttle means 39 so that the diameter of the hole 38 is the smallest, and restricts the removal of the first sphere 40a having the smallest outer diameter. . When it is at the intermediate position, it allows the removal of the first sphere 40a while restricting the removal of the second sphere 40b. When it is at the rear side of the vehicle, the diameter of the hole 38 is squeezed the most, Further, while allowing the second spheres 40a and 40b to be removed, the removal of the third sphere 40c having the largest outer diameter is restricted. Thereby, the pull-out length of the second transmission member 16 from the casing 17 is adjusted, and the distance between the front end portion 17 and the rear end portion 20 of the tension transmission member 14 is adjusted.

  Thereby, when the seat slide position is the front side position of the vehicle, it is possible to form a recessed portion Y that is deeply recessed, so that the impact on the passenger's head can be mitigated, and when the seat slide position is the rear side position of the vehicle, the recessed portion Y is formed shallower. And can catch the passenger's head without time delay. Thus, an appropriate occupant restraining action can be ensured even for variously changed seat slide positions.

  In the above embodiment, the case where a part of the tension transmission member 14 is disposed outside the airbag body 1 has been described. However, as shown in FIG. You may make it arrange | position to. In this case, the guide member 21 is attached to the inner surfaces of the left and right side sheet materials 2 of the airbag body 1. Thereby, it replaces with the hole 10a, and the front end 21a of the said guide member 21 is comprised as the via | veering part 10. FIG. In this way, the tension transmission member 14 does not appear outside the airbag body 1, and safety can be improved. The tension transmission member 14 may be composed of a single member without being divided into the first transmission member 15 and the second transmission member 16. In this way, the structure can be simplified and the productivity can be improved.

  As shown in FIG. 11, the front end portion of the guide member 21 may be formed in a bifurcated shape so as to correspond to the second transmission member 16 disposed toward the pair of upper and lower holes 10a. Although the hole 10a is formed as a pair on the left and right, a single hole 10a may be formed with one second transmission member 16 inserted into the airbag body 1.

  Furthermore, in the above embodiment example, the concave portion forming joint 8 shifted rearward is set at the joint position of the central sheet material 3, and the concave portion Y is recessed in advance toward the inside of the airbag body 1. Although the case where it forms is demonstrated as an example, it is not restricted to such an example, As shown in FIG. 12, the recessed part formation junction part 8 shifted to back does not need to be set. In this case, the adjacent central side edges of the central sheet material 3 are joined along the outer contour of the edge via the joint margin 5. Accordingly, the front end portion 17 of the first transmission member 15 sewn to the joining allowance 5 is joined to the periphery of the center portion of the occupant restraint surface X in the left-right direction. Other configurations are the same as those in the above embodiment. The occupant restraint surface X of the airbag body 1 forms a flat surface unless tension is generated on the first transmission member 15 and is pulled backwards, and the occupant restraint surface X is pulled backwards by generation of tension. Thus, a recess Y is formed in the occupant restraint surface X. In this modification, for example, when the micro gas generator 33 is activated, both the chest and the head of the occupant are received by the occupant restraint surface X without the recess Y, and when the micro gas generator 33 is not activated, the recess Y is formed. It is received by the occupant restraint surface X. Even with such a configuration, it is a matter of course that the same operational effects as the above-described embodiment can be obtained.

1 is a perspective view showing a deployed and inflated state of an airbag body, showing an example of a preferred embodiment of a vehicle airbag apparatus according to the present invention. It is a front view which shows the passenger | crew restraint surface formed in the airbag main body employ | adopted as the airbag apparatus of the vehicle of FIG. FIG. 2 is a plan sectional view of the airbag apparatus for the vehicle shown in FIG. 1. It is a perspective view which shows the main structures of the airbag apparatus of the vehicle of FIG. It is a perspective view which shows the layout of the inflator and recessed part form adjustment means which are applied to the airbag apparatus of the vehicle of FIG. It is explanatory drawing for demonstrating the recessed part form adjustment means applied to the airbag apparatus of the vehicle of FIG. It is a side view of the recessed part form adjustment means shown in FIG. It is a disassembled perspective view of the recessed part form adjustment means shown in FIG. It is a flowchart figure which shows the control flow of the airbag apparatus of the vehicle shown in FIG. It is a schematic perspective view which shows the modification of the recessed part form adjustment means applied to the airbag apparatus of the vehicle shown in FIG. It is a principal part perspective view which shows the modification of the guide member applied to the airbag apparatus of the vehicle shown in FIG. It is a perspective view which shows the modification of the airbag main body shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Airbag main body 10 Via part 10a Hole 13 Recessed form adjustment means 14 Tension transmission member 15 1st transmission member 16 2nd transmission member 17 Front end part of tension transmission member 20 Rear end part of tension transmission member 21 Guide member 36 Seat belt Wear sensor 41 Seat slide position sensor X Passenger restraint surface Y Recess

Claims (9)

An airbag body that is deployed and inflated with inflator gas and the front surface is an occupant restraint surface;
A recess formed in the airbag main body at a central portion in the left-right direction of the occupant restraint surface;
A pair of left and right vias formed respectively on the left and right side surfaces of the airbag body and positioned obliquely behind the recess;
A front end portion joined to the periphery of the concave portion and a rear end portion supported by being extended to the rear side of the airbag body through the via portion; A pair of left and right tension transmitting members that pulls the concave portion backward with tension generated between the portion and the rear end portion;
A recess configuration adjusting means provided on the vehicle body side, for adjusting the amount of depression of the recess by adjusting the distance between the rear end and the front end while supporting the rear end of each tension transmitting member; A vehicle airbag apparatus comprising the vehicle.   The left and right side surfaces of the airbag main body are provided with guide members that slidably guide the tension transmitting member from the transit portion to the rear side of the airbag main body along the side surfaces. Item 2. The vehicle airbag device according to Item 1.   The via portion is a hole through which the tension transmitting member penetrates from the inside of the airbag body to the outside, and the tension transmitting member is disposed inside the airbag body and has a front end portion around the recess. The belt-shaped first transmission member to which the first and second members are joined is connected to the second transmission member disposed outside the airbag body and supported by the recess shape adjusting means. The airbag apparatus for vehicles according to 1 or 2. An airbag body that is deployed and inflated with inflator gas and the front surface is an occupant restraint surface;
A pair of left and right vias formed respectively on the left and right side surfaces of the airbag main body, obliquely and rearwardly from the periphery of the center in the left-right direction of the occupant restraint surface;
A front end part joined to the periphery of the center part in the left-right direction of the occupant restraining surface of the airbag main body and a rear end part extended and supported to the rear side of the airbag main body through the transit part; A pair of left and right tension transmissions that pulls the occupant restraint surface rearward with tension generated between the front end portion and the rear end portion to form a recess in the occupant restraint surface by deploying and inflating the airbag body. Members,
A recess shape adjusting means that is provided on the vehicle body side and that adjusts the distance between the rear end portion and the front end portion while supporting the rear end portion of each tension transmission member, thereby adjusting the amount of depression of the recess. A vehicle airbag apparatus comprising the vehicle.   The left and right side surfaces of the airbag main body are provided with guide members that slidably guide the tension transmitting member from the transit portion to the rear side of the airbag main body along the side surfaces. Item 5. The vehicle airbag device according to Item 4.   The via portion is a hole through which the tension transmitting member penetrates from the inside to the outside of the airbag main body, and the tension transmitting member is disposed inside the airbag main body and is provided on the left and right sides of the occupant restraint surface. A belt-shaped first transmission member whose front end is joined to the periphery of the center in the direction and a second transmission member disposed outside the airbag body and supported by the recess shape adjusting means are connected to each other. The vehicle airbag device according to claim 4, wherein the vehicle airbag device is a vehicle airbag device.   6. The vehicle airbag apparatus according to claim 1, wherein the tension transmitting member is disposed inside the airbag body.   A seat belt wearing sensor that detects a seat belt wearing / non-wearing state and outputs a detection signal to the recessed portion shape adjusting means, the recessed portion shape adjusting means being in a non-wearing state rather than a seat belt wearing state, The vehicle airbag apparatus according to any one of claims 1 to 7, wherein a distance between the tension supporting end portion and the joining end portion of the transmission member is adjusted to be long.   A seat slide position sensor that detects a seat slide position and outputs a detection signal to the recess configuration adjusting means, and the recess configuration adjusting means detects the position of the vehicle front side when the seat slide position is the vehicle rear side position; 8. The vehicle airbag device according to claim 1, wherein the distance between the tension supporting end portion of the tension transmitting member and the joint end portion is adjusted to be longer than the case. .

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