JP2007038812A - Air bag device for passenger seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air bag device for a passenger seat capable of preventing a neck part of a passenger from being subjected to partial strong pushing of the deployed and inflated air bag in a small area near an upper end of a connection cloth part for connecting a right and a left shoulder constraining parts each other. <P>SOLUTION: The air bag for a passenger seat is provided with the air bag 14 to be projected backward for inflation from a housing part provided in an instrument panel. The air bag 14 is provided with the shoulder constraining parts 22 and 23 capable of respectively constraining a right and a left shoulders and a housing recessed part 25 arranged between the right and the left shoulder constraining parts 22 and 23 and recessed forward so as to receive the head of the passenger intruding the recessed part. The air bag 14 is provided with a receiver surface 28 in the depth of the housing recessed part 25 thereof along the nearly vertical direction so as to prevent separation of the right and the left shoulder constraining parts from each other in the right and left direction, and the connection cloth part 27 is arranged there. The connection cloth part 27 is provided with a bending part 29 to be bent forward on an upper end 28a side of the receiver surface 28. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an airbag device for a passenger seat that includes an airbag that protrudes rearward from an instrument panel storage site in front of a passenger seat of a vehicle and completes inflation.

  Conventionally, as an airbag of an airbag device for a passenger seat, it is arranged so as to protrude rearward on both right and left sides on the rear side and be juxtaposed in the left and right directions, and can restrain both the left and right shoulders of the occupant, respectively. There is a configuration that includes a shoulder restraint portion and a storage recess that is disposed between the shoulder restraint portion and the left and right shoulder restraint portions and is recessed forward so that the head of the occupant can enter and be received (for example, a patent) Reference 1).

And in this airbag, it arrange | positions in the front side of the shoulder restraint part used as the back | inner side of a storage recessed part, and follows a substantially up-down direction so that the mutual isolation | separation to the left-right direction of the left and right shoulder restraint part may be prevented. A connecting cloth portion provided with a receiving surface is provided.
JP 2004-256016 A

  However, in the conventional airbag device for the passenger seat, when the airbag is deployed and inflated, the upper end of the receiving surface of the connecting fabric portion is directly directed obliquely upward from below to the vicinity of the neck portion of the occupant moving forward. Intrusion so that it hits, there is a possibility of partial strong pressing in a small area, there was room for improvement.

  The present invention solves the above-described problem, and an airbag that is deployed and inflated has a narrow area in the vicinity of the upper end of the connecting cloth portion that connects the left and right shoulder restraint portions with respect to the vicinity of the neck portion of the occupant. It is an object of the present invention to provide an airbag device for a passenger seat that can prevent strong pressing.

A first passenger seat airbag device according to the present invention includes an airbag that protrudes rearward from the instrument panel storage portion in front of the passenger seat of the vehicle to complete inflation,
An air bag is arranged so as to protrude rearward on both the left and right sides of the rear side and be juxtaposed in the left and right directions, and a shoulder restraint portion capable of restraining the vicinity of both left and right shoulders of the occupant, and left and right shoulder restraint portions A storage recess that is disposed between and recessed forward so that the head of the occupant can enter and can be received, and the rear side of the storage recess so as to prevent the left and right shoulder restraints from being separated from each other in the left-right direction. An airbag device for a passenger seat configured to include a connecting cloth portion that is disposed on the front side of the shoulder restraint portion and is provided with a receiving surface substantially along the vertical direction,
The connecting cloth portion of the airbag is provided with a bent portion that is bent forward at the upper end side of the receiving surface.

  In the first passenger seat airbag device according to the present invention, when the airbag is deployed and inflated, the occupant moving forward is bent even if it tries to abut the neck near the upper end of the receiving surface of the connecting cloth. The front part is secured to a wide area in the front-rear direction and hits the vicinity of the neck, so that it is possible to prevent partial and strong pressing against the vicinity of the neck of the occupant in a narrow area, and damage to the vicinity of the neck Can be reduced.

  Therefore, in the first passenger seat airbag device according to the present invention, the airbag that is deployed and inflated is located near the upper end of the connecting fabric portion that connects the left and right shoulder restraint portions with respect to the vicinity of the neck of the occupant. It is possible to prevent partial strong pressing in a small area.

  The bent portion in the vicinity of the upper end of the receiving surface of the connecting cloth portion in the airbag may be bent so as to be substantially orthogonal to the lower end side of the receiving surface as long as the area of the upper surface of the receiving surface can be increased in the front-rear direction. However, it may be formed so as to bend in a curved shape with a large radius dimension on the front side, or may be bent so as to extend obliquely upward. If it is formed in an R shape with a large radius dimension, the bent portion is a curved surface and interferes with the vicinity of the occupant's neck, so the bent portion can receive the vicinity of the neck more softly. Further, if the bent portion is bent so as to extend obliquely upward, the bent portion can receive the vicinity of the chin of the occupant, and interference with the vicinity of the neck portion of the receiving surface can be prevented.

Further, the second passenger seat airbag device according to the present invention includes an airbag that protrudes rearward from the instrument panel storage portion in front of the passenger seat of the vehicle to complete the inflation,
An air bag is arranged so as to protrude rearward on both the left and right sides of the rear side and be juxtaposed in the left and right directions, and a shoulder restraint portion capable of restraining the vicinity of both left and right shoulders of the occupant, and left and right shoulder restraint portions A storage recess that is disposed between and recessed forward so that the head of the occupant can enter and can be received, and the rear side of the storage recess so as to prevent the left and right shoulder restraints from being separated from each other in the left-right direction. An airbag device for a passenger seat configured to include a connecting cloth portion that is disposed on the front side of the shoulder restraint portion and is provided with a receiving surface substantially along the vertical direction,
When the airbag is deployed and inflated from the instrument panel storage site, the receiving surface of the airbag connecting cloth portion is substantially horizontally aligned at least from the stage before completion of inflation until the completion of inflation. Thus, the movement guide means for moving is arranged and configured.

  In the second passenger seat airbag device according to the present invention, when the airbag is deployed and inflated, the passenger moving forward tries to contact the neck near the upper end of the receiving surface of the connecting cloth portion. Since the surface is moved rearward along the substantially horizontal direction by the movement guide means, the upper end surface of the receiving surface itself is orthogonal to the surface, that is, from the lower side to the diagonally upward direction. Can be prevented from being applied to the vicinity of the neck of the occupant, and can be prevented from being partially pressed against the vicinity of the neck of the occupant with a small area, thereby reducing damage to the vicinity of the neck.

  Therefore, even in the second passenger seat airbag device according to the present invention, the airbag that deploys and inflates the vicinity of the upper end of the connecting cloth portion that connects the left and right shoulder restraint portions with respect to the vicinity of the neck of the occupant, It is possible to prevent partial strong pressing in a small area.

  In addition, as the movement guide means for moving the receiving surface of the connecting cloth portion along the substantially horizontal direction, there is one that translates the moving direction of the upper and lower ends of the receiving surface of the connecting cloth portion rearward along the substantially horizontal direction. For example, the inflation gas is applied to the inner peripheral surface side of the airbag near the upper and lower ends of the receiving surface of the connecting cloth portion and guided and moved rearward along the substantially horizontal direction. When the folding of the airbag when deploying and inflating from the stowed state is resolved, the movement direction of the upper and lower ends of the receiving surface of the connecting cloth portion is moved rearward along the substantially horizontal direction. Examples of the folded shape of the airbag that can be translated are illustrated.

  Further, when the receiving surface of the connecting cloth part is moved rearward along the substantially horizontal direction, the period from when the airbag is completely inflated to when it is completely inflated is, in other words, before the airbag is completely inflated. This is the period from the time when there is a possibility of interference with the occupant to the completion of the inflation of the airbag, and the state before the completion of the inflation of the airbag except for the initial stage of the inflation of the airbag near the time when the airbag protrudes from the storage part. .

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, an airbag device M1 for a passenger seat according to the first embodiment is an upper surface of an instrument panel (hereinafter referred to as an instrument panel) 1. It is a top mount type arranged inside the 2 side. The airbag apparatus M1 includes a folded airbag 14, an inflator 8 that supplies inflation gas to the airbag 14, a case 6 that stores and holds the airbag 14 and the inflator 8, and an airbag 14 that is the case 6 And the airbag cover 10 that covers the folded airbag 14.

  In the present specification, the up / down, front / rear, and left / right directions correspond to the up / down, front / rear, and left / right directions of the vehicle in a straight traveling state of the vehicle.

  The airbag cover 10 is formed integrally with the instrument panel 1 made of synthetic resin, and is configured such that when the airbag 14 is deployed and inflated, the front and rear door portions 10a and 10b are pushed by the airbag 14 and opened. ing. Further, a connecting wall portion 10 c connected to the case 6 is formed around the door portions 10 a and 10 b of the airbag cover 10.

  The inflator 8 includes a substantially cylindrical main body portion 8 a having a plurality of gas discharge ports 8 b and a flange portion 8 c for attaching the inflator 8 to the case 6.

  The case 6 is formed in a substantially rectangular parallelepiped shape made of a sheet metal having a rectangular opening on the upper end side, a substantially rectangular plate-like bottom wall portion 6a to which the inflator 8 is inserted from below and attached to the outside of the bottom wall portion 6a. And a peripheral wall portion 6b that extends upward from the periphery and engages the connecting wall portion 10c of the airbag cover 10. The case 6 is provided with a bracket (not shown) connected to the vehicle body side at the bottom wall 6a.

  Note that the airbag 14 and the inflator 8 include a plurality of bolts 11a of an annular retainer 11 disposed in the airbag 14, and the airbag 14, the flange portion 8c of the inflator 8, and the case bottom wall portion 6a. , And the nut 12 is fixed to the case 6.

  As shown in FIGS. 1 to 5, the airbag 14 has a substantially quadrangular pyramid shape with the front end side as a top portion and the rear surface side of the bottom surface as an occupant protection portion 21 as shown in FIGS. The air bag 14 is folded and housed on the upper surface 2 side of the instrument panel 1 in front of the passenger seat when mounted on a vehicle, and between the instrument panel upper surface 2 and the windshield 4 when the inflation gas flows in. As it closes, it protrudes upward and protrudes rearward, and the occupant protection part 21 on the rear surface side protects the occupant. And the airbag 14 is comprised by using the site | part of the front side of the passenger | crew protection part 21 as the vehicle body side part 15. FIG.

  The vehicle body side portion 15 is provided with a gas inlet 16 that is opened in a circular shape so as to allow the inflating gas to flow in the center in the left-right direction on the lower surface side of the front end. A plurality of mounting holes 17 are formed on the periphery of the gas inlet 16 to allow the bolts 11 a of the retainer 11 to pass therethrough and attach the periphery of the gas inlet 16 to the bottom wall portion 6 a of the case 6.

  When the inflation is completed, the occupant protection part 21 projects left and right shoulder restraint parts 22 and 23 that can protect the vicinity of the left and right shoulders S (SL and SR) of the occupant P to the left and right sides, respectively. A storage recess 25 is provided between the left and right shoulder restraint portions 22 and 23, and a storage recess 25 that is recessed to the front side so that the head H of the occupant P can enter and be received is provided ( (See Figs. 7 and 8). The left and right shoulder restraining portions 22 and 23 are recessed from each other in the region from the upper end to the lower end of the occupant protection portion 21 on the rear surface side of the airbag 14 on the occupant protection portion 21 side, to the rear side. It protrudes.

  As shown in FIGS. 7 and 8, the protection state of the occupant P in the occupant protection unit 21 is such that the left and right shoulder portions SL and SR of the occupant P moving forward are received by the left and right shoulder restraint portions 22 and 23, respectively. The kinetic energy of the occupant P is absorbed, and the occupant head H is softly received by the storage recess 25. In the receiving recess 25, the inner facing surfaces 22a and 23a of the left and right shoulder restraining portions 22 and 23 extend forward while being in contact with each other so that the occupant head H is sandwiched from the left and right. Then, it will be received softly.

  Further, on the occupant protection portion 21 side, on the front side of the shoulder restraint portions 22 and 23 which are the back side of the storage recess 25, the left and right shoulder restraint portions 22 and 23 are prevented from being separated from each other in the left-right direction. Further, a connecting cloth portion 27 is disposed. The connecting cloth portion 27 is formed by joining two flexible cloth materials 27a. That is, the cloth materials 27a and 27a are joined to the surface portions of the inner facing surfaces 22a and 23a on the base portion 27b side, and the tips 27c are joined to each other to form the connecting cloth portion 27. . In consideration of interference with the occupant P, the connecting cloth portion 27 is provided with a flat receiving surface 28 extending substantially in the vertical direction, and a cloth material 27a is provided on the upper end 28a of the receiving surface 28. A bent portion 29 that bends in a substantially orthogonal direction to the front side is formed so that the width dimension in the front-rear direction can be ensured without forming the upper end surface only by the thickness of. In the case of the embodiment, the receiving surface 28 is a flat plane for the chest B of the occupant P that moves forward with the left and right shoulders SL and SR being restrained by the left and right shoulder restraining portions 22 and 23. In order to be able to be received, when the inflation of the airbag 14 is completed, the upper end 28a is arranged slightly forward from the lower end 28b. In addition, the intersection of the upper end 28a of the receiving surface 28 with the bent portion 29 is bent with the receiving surface 28 by drawing an arc surface having an arcuate radial dimension r that is approximately ¼ circle so as to suppress cornering. The part 29 is connected.

  As shown in FIG. 6, the airbag 14 includes a first base cloth 31, two second base cloths 36, 36, and two sheets constituting a connecting cloth portion 27 except for a reinforcing cloth (not shown). Cloth materials 27a and 27a, each of which is formed of a flexible woven fabric such as polyamide or polyester. The first base fabric 31 includes a substantially rectangular base portion 32 that forms the periphery of the gas inlet 16, and a side portion 33 that extends in a circular shape from the left and right sides of the base portion 32 and that forms the left and right side surfaces of the airbag 14. 34. Arc-shaped outer peripheries 33a and 34a that are separated from the base 32 of the side surface portions 33 and 34 constitute the vicinity of the top portion that protrudes rearward from the left and right shoulder restraint portions 22 and 23. Further, the second base fabric 36 is a part constituting the inner facing surfaces 22a and 23a from the vicinity of the tops protruding rearward of the left and right shoulder restraining parts 22 and 23, and the arcuate part of the outer peripheral edge 36a is: It is combined with the outer peripheral edges 33a and 34a of the side surface portions 33 and 34, respectively, and constitutes the vicinity of the top portion protruding rearward of the left and right shoulder restraint portions 22 and 23. Further, the inner peripheral edges 36b of the second base fabric 36 are coupled to each other to become a coupling site between the front ends of the inner facing surfaces 22a and 23a.

  The inner facing surfaces 22a and 23a are connected to each other in a circular arc shape at the front ends to form the periphery of the communication hole 18 that communicates the left and right shoulder restraining portions 22 and 23 in the left-right direction. Further, vent holes 19 for exhausting excess inflation gas are opened at the positions of the side surface portions 33 and 34.

  The production of the airbag 14 will be described. First, the base portions 27b of the cloth material 27a are stitched to the predetermined positions of the two second base cloths 36 and 36, respectively, and the leading ends 27c of the cloth materials 27a are mutually connected. Further, the inner peripheral edges 36b of the second base fabrics 36 and 36 are stitched together. Next, the front edges 36c of the second base fabrics 36, 36 are sewn in a straight line so as not to overlap the left and right areas of the base 32 on the front edge 32a side of the first base cloth 31, and The end edges 36d on the rear end side of the second base fabrics 36, 36 are sewn in a straight line so as not to overlap the left and right areas on the rear edge 32b side of the base portion 32 in the first base cloth 31. Then, the left and right edges 32c and 32d of the base portion 32 of the first base fabric 32 are sewn with a part of the outer peripheral edges 33a and 34a of the side surface portions 33 and 34 in the vicinity thereof. Subsequently, the remaining portions of the outer peripheral edges 33a and 34a of the side surface portions 33 and 34 and the outer peripheral edges 36a of the second base fabrics 36 and 36 are sewn, and then the gas flow is performed so as not to expose the seam allowance of the edges to the outside. If it is reversed using the inlet 16, the airbag 14 can be manufactured.

  After manufacturing the airbag 14, the airbag 11 is folded so that the bolts 11a are protruded from the mounting holes 17 and the retainer 11 is disposed therein. Further, the airbag 14 is folded so as not to collapse. The bag 14 is wrapped around a wrapping material (not shown) that can be broken. Then, the folded airbag 14 is placed on the bottom wall portion 6a of the case 6 while the bolts 11a are inserted through the case bottom wall portion 6a, and then the main body portion 8a of the inflator 8 is placed on the bottom wall portion 6a. While being inserted into the case 6 from below, the bolts 11a protruding downward from the bottom wall portion 6a are inserted into the flange portion 8c of the inflator 8. Thereafter, the folded airbag 14 and the inflator 8 can be attached to the bottom wall portion 6 a of the case 6 by fastening the nut 12 to each bolt 11 a protruding from the flange portion 8 c of the inflator 8.

  Then, the peripheral wall portion 6b of the case 6 is locked to the connecting wall portion 10c of the airbag cover 10 in the instrument panel 1 mounted on the vehicle, and a predetermined bracket (not shown) of the case 6 is fixed to the body side portion. If a lead wire (not shown) for actuation from the airbag actuation circuit is connected to the inflator 8, the passenger seat airbag device M1 can be mounted on the vehicle.

  If the inflation gas is discharged from each gas discharge port 8b of the inflator 8 at the time of frontal collision of the vehicle after the airbag device M1 is mounted on the vehicle, the airbag 14 expands and breaks a wrapping material (not shown). At the same time, the door portions 10a and 10b of the airbag cover 10 are pushed and opened as shown by the two-dot chain line in FIG. The airbag 14 protrudes upward from the opening formed by opening the door portions 10a and 10b of the airbag cover 10 and closes the space between the instrument panel upper surface 2 and the windshield 4 above the instrument panel 1. Then, it expands and expands to the rear side of the vehicle, and the expansion is completed as shown by the two-dot chain line in FIG. 1 and FIGS.

  In the passenger seat airbag device M1 of the first embodiment, when the airbag 14 is deployed and inflated, the occupant P moving forward contacts the vicinity of the neck N with the vicinity of the upper end 28a of the receiving surface 28 of the connecting cloth portion 27. Even if the vicinity of the upper end 28a is moved relative to the vicinity of the neck N from the lower side to the obliquely upward direction from the lower side, the bent portion 29 ensures a wide area in the front-rear direction. Therefore, it is possible to prevent the occupant P from being pressed strongly against a portion of the neck N of the occupant P in a small area, and damage to the vicinity of the neck N can be reduced.

  Therefore, in the passenger seat airbag device M1 of the first embodiment, the airbag 14 that is deployed and inflated is located near the upper end 28a of the connecting cloth portion 27 that connects the left and right shoulder restraint portions 22 and 23 to the neck portion of the occupant P. It is possible to prevent partial pressing with a small area against the vicinity of N.

  Note that the bent portion 29 in the vicinity of the upper end 28a of the receiving surface 28 of the connecting cloth portion 27 in the airbag 14 may have a receiving surface 28 as in the first embodiment if the area of the upper surface of the receiving surface 28 can be widened in the front-rear direction. It may be bent so as to be substantially orthogonal to the lower end side of the lens, but it is formed on the front side so as to bend in a curved shape in an R shape having a larger radius dimension r (see FIG. 4), Alternatively, it may be bent so as to extend obliquely upward. If it is formed in an R shape with a large radius r, the bent portion is a curved surface and interferes with the vicinity of the occupant's neck, so the bent portion can receive the vicinity of the neck more softly. Further, as shown in FIG. 10, if the bent portion 29A is bent so as to extend obliquely upward while preventing interference with the face F, the bent portion 29A has the tip of the chin J of the occupant P. The vicinity can be received, and interference with the vicinity of the neck N of the receiving surface 28 can be prevented.

  Moreover, you may comprise like airbag 14A like the airbag apparatus M2 for passenger seats of 2nd Embodiment shown to FIG. When the airbag 14A is deployed and inflated, after most of the airbag 14A protrudes toward the upper surface 2 of the instrument panel 1, at least from the stage before the completion of inflation to the completion of inflation, in other words, From the time when there is a possibility of interfering with the occupant P before the completion of the inflation of the bag 14A until the completion of the inflation of the airbag 14A, the receiving surface 28 of the connecting cloth portion 27 is moved along the substantially horizontal direction by the movement guide means T. To move backward. In the second embodiment, the movement guide means T applies the inflation gas G to the inner peripheral surface of the airbag 14A in the vicinity of the upper and lower ends 28a and 28b of the connecting cloth portion 27 and receives the inflation gas G. The gas flow adjusting material 40 that adjusts the flow of the expansion gas G is configured to guide and move the surface 28 rearward along the substantially horizontal direction.

  This gas flow adjusting member 40 is configured to rectify and linearly flow the inflation gas G flowing in from the gas inlet 16 of the airbag 14A in the diagonally upward and backward direction. Specifically, the gas outlets 41 and 42 are disposed on the front side and the rear side so as to cover the upper side of the gas inlet 16, and the outlet 42 facing the rear side is provided. The upper edge side peripheral edge 43 of the airbag 14A when mounted on the vehicle is moved so that the vicinity of the joint portion with the second base fabric 36 on the base portion 27b side of the left and right cloth materials 27a is moved rearward in the substantially horizontal direction. At the time of deployment and expansion, the expansion gas G is configured to flow linearly in an obliquely upward and rearward direction.

  In the case of the embodiment, the inflation gas G flowing out from the rear-side outlet 42 is linearly flowing obliquely upward and rearward, but the airbag 14A is inflated so as to protrude upward from the upper surface 2 of the instrument panel 1. In the state before the completion, due to the flow of the expansion gas G, the vicinity of the joint portion of the connecting cloth portion 27 with the second base cloth 36 near the base portion 27b of the cloth material 27a is moved substantially rearward in the horizontal direction. Can be moved.

  In addition, the gas flow adjusting material 40 of the embodiment is formed of two cloth materials 40 a made of woven fabric such as polyamide, and the base portion 32 of the first base cloth 31 is disposed on the base portion 40 b side of the two cloth materials 40 a. The first inflow cloth 31 is sewn to the vicinity of the gas inlet 16, and the front end 40 c side is sewn to each other and disposed on the first base cloth 31.

  The passenger seat airbag device M2 of the second embodiment is different from that of the airbag 14A in that it includes the gas flow adjusting member 40, and is different from that of the other parts / parts or vehicle. Is the same as in the first embodiment.

  In the passenger seat airbag device M2, when the airbag 14A is operated after being mounted on the vehicle, the airbag 14A is inflated and inflated, and the passenger P moving forward moves the neck N near the receiving surface 28 of the connecting cloth portion 27. Even when trying to contact the vicinity of the upper end 28a, the receiving surface 28 is moved along the substantially horizontal direction by the gas flow adjusting member 40 of the movement guide means T. It can be prevented from hitting the vicinity of the neck N of the occupant P in the direction orthogonal to the surface, that is, from the lower side to the diagonally upward direction. Can be prevented, and damage to the vicinity of the neck N can be reduced.

  Therefore, in the passenger seat airbag device M2 of the second embodiment, the airbag 14A that is deployed and inflated is located near the upper end 28a of the connecting cloth portion 27 that connects the left and right shoulder restraint portions 22 and 23 to the neck portion of the occupant P. It is possible to prevent partial pressing with a small area against the vicinity of N.

  In the second embodiment, the connecting cloth portion 27 of the airbag 14A includes the bent portion 29 at the upper end 28a of the receiving surface 28 as in the first embodiment, but the bent portion 29 is not provided. Even in this connection cloth portion, the receiving surface 28 is moved along the substantially horizontal direction by the gas flow adjusting member 40 of the movement guide means T, so that the same operation and effect can be obtained. Of course, if the airbag of the second embodiment is provided with the connecting cloth portion 27 having the bent portion 29, the operation and effect of the first embodiment can be obtained.

  Further, as the movement guide means T for moving the receiving surface 28 of the connecting cloth portion 27 rearward along the substantially horizontal direction, the moving directions of the upper and lower ends 28a and 28b of the receiving surface 28 of the connecting cloth portion 27 are set to be substantially horizontal. In addition to the gas flow adjusting member 40 that adjusts the flow of the inflation gas as in the second embodiment, the airbag can be folded when deployed and inflated from the stored state. The folding shape of the airbag 14 can be exemplified such that the movement direction of the upper and lower ends 28a and 28b of the receiving surface 28 of the connecting cloth portion 27 is translated rearward along the substantially horizontal direction at the time of cancellation.

  In the passenger seat airbag apparatus M3 of the third embodiment shown in FIGS. 13 and 14, the folded shape (folding step) of the airbag 14 is used as the movement guide means T. In the third embodiment, the folding process of the airbag 14 is different, and the mounting process to other parts / parts and the vehicle is the same as that of the first embodiment.

  As shown in FIG. 13A, the airbag 14 of the third embodiment first opens the left and right shoulder restraint portions 22 and 23 left and right so that the occupant protection portion 21 side on the rear surface is flattened. The airbag 45 having an initial folded shape is formed by unfolding forward and overlapping the vehicle body side portion 15 side. At this time, when the airbag 14 is deployed and inflated, the occupant protection portion 21 side can be quickly arranged along the vertical direction, that is, the upper portion 21a side of the occupant protection portion 21 is located above the lower portion 21b. The upper 21a side vicinity of the passenger | crew protection part 21 is arrange | positioned just above the gas inflow port 16 so that it may stand up. In addition, the retainer 11 is stored in the airbag 14 in advance.

  Next, as shown in FIGS. 13A and 13B, the air bag 45 is folded in a horizontal direction with a fold along the left-right direction so as to narrow the width dimension in the front-rear direction, and the air of the horizontally folded body is folded. A bag 49 is formed. In the case of the embodiment, the rear side portion 47 is related to the front side portion 46 and the rear side portion 47 of the gas inlet 16 so that the upper and lower ends 28a and 28b of the receiving surface 28 can move in parallel when the folding is canceled. The rear side portion 47 has a length in the front-rear direction longer than that of the front side portion 46 so as to be delayed from the front side portion 46, and is folded by roll folding that delays the release of folding. In the case of the embodiment, the roll folding is performed so that the rear edge 45 b of the airbag 45 is wound downward so as to approach the gas inlet 16. In the case of the embodiment, the front side portion 46 is also folded in the same manner as the rear side portion 47 by folding the front edge 45 a so as to be wound downward so as to approach the gas inlet 16. It is said.

  Next, as shown in FIGS. 13B and 13C, the airbag 49 is folded in the longitudinal direction so as to narrow the width of the airbag 49 in the left-right direction, thereby forming the airbag 51 as a folded body. To do. In the case of the embodiment, the left and right edges 49 a and 49 b of the airbag 49 are folded downward so as to be placed on the gas inlet 16.

  After the airbag 14 is folded, it is housed and held in the case 6 together with the inflator 8 and mounted on the vehicle, as in the first embodiment.

  In the passenger seat airbag device M3 according to the third embodiment, when the airbag 14 is deployed and inflated during operation after being mounted on the vehicle, the airbag 14 is folded in a process substantially opposite to the folding process of the airbag 14. Eliminate. That is, when the wrapping material (not shown) is broken and the door portions 10a and 10b of the airbag cover 10 are pushed open to protrude from the case 6, the upper portion 21a side of the occupant protection portion 21 placed immediately above the gas inlet 16 is While being pushed up, the vertical folding is canceled and the horizontal folding is canceled. Therefore, in the vicinity immediately after the vertical folding is eliminated, the upper portion 21a side of the occupant protection portion 21 is disposed above the lower portion 21b side as shown by the two-dot chain line in FIG. -The rear side portions 46 and 47 eliminate the roll folding.

  This roll fold is a fold in which the cancellation of the fold is delayed as compared with the bellows fold, and further, the roll fold distance is longer in the rear side portion 47 than in the front side portion 46. Therefore, as shown in FIGS. 14A and 14B, the upper side 21a quickly cancels the lateral folding of the entire region from the lower side 21b side, and the vicinity of the coupling site on the base part 27b side of the connecting cloth part 27 is substantially the same. Move backward in the horizontal direction.

  Therefore, as shown in FIGS. 14B and 14C, even if the occupant P moving forward tries to contact the vicinity of the neck N with the vicinity of the upper end 28a of the receiving surface 28 of the connecting cloth portion 27, the receiving surface 28 is moved. Because the folded shape of the airbag 14 constituting the guide means T is moved rearward along the substantially horizontal direction, the upper end surface itself of the receiving surface 28 is perpendicular to the surface, that is, obliquely upward from below. Can be prevented from being applied to the vicinity of the neck N of the occupant P, and can be prevented from being partially pressed against the vicinity of the neck N of the occupant P in a narrow area, reducing damage to the vicinity of the neck N it can.

  Therefore, also in the passenger seat airbag device M3 of the third embodiment, the airbag 14 that is deployed and inflated is located near the upper end 28a of the connecting cloth portion 27 that connects the left and right shoulder restraint portions 22 and 23, and the neck portion of the occupant P. It is possible to prevent partial pressing with a small area against the vicinity of N.

  In addition, the folding-shaped characteristic part of the airbag 14 constituting the movement guide means T of the third embodiment is arranged in the vicinity of the upper portion 21a side of the occupant protection part 21 immediately above the gas inlet 16 so that the gas inlet 16 With respect to the front side / rear side portions 46 and 47, the rear side portion 47 is made longer in the front-rear direction than the front side portion 46 so that the rear side portion 47 is delayed from the front side portion 46, and And it is in the point made into the shape folded by roll folding which the cancellation | release of folding delays.

  Therefore, as shown in FIGS. 15A and 15B, when the front side and rear side portions 46 and 47 of the airbag 45 in the initial folded state are vertically folded, the front and rear edges 45a and 45b are rolled and rolled up on the upper side. Alternatively, the folded body 49A may be formed by folding.

  Even when the airbag 14 is folded in this way, the rear side portion 47 is delayed in cancellation of the folding compared to the front side portion 46. Therefore, as shown in FIGS. Since the surface 28 is moved backward along the substantially horizontal direction, the neck N of the occupant P is formed so that the upper end surface of the receiving surface 28 is perpendicular to the surface, that is, obliquely upward from below. It is possible to prevent it from being applied to the vicinity, and it is possible to prevent the occupant P from being pressed against the vicinity of the neck N of the occupant P with a small area, and to reduce damage to the vicinity of the neck N.

  In addition, if the rear side part 47 is late to cancel the folding compared to the front side part 46, that is, if the front side part 46 can release the folding more quickly than the rear side part 47, the above-described effect is obtained. Since it is easy to obtain the effect, the front side portion 46 is simply folded by bellows folding with the left and right folds folded so that the front edge 45a approaches the gas inlet 16 side, and the rear side portion 47 may be rolled. In this case, if the entire area of the lateral folding of the front side portion 46 is quickly eliminated, the front side portion 46 is made longer than the rear side portion 47 with respect to the length dimension in the front-rear direction. The position in the vicinity of the upper part 21a arranged in the vicinity of the upper part may be a position approaching the lower part 21b side.

  Of course, when the airbag is deployed and inflated, the receiving surface 28 is not limited to the folding method shown in the drawing as long as it is moved backward along the substantially horizontal direction.

  Also in the third embodiment, the connecting cloth portion 27 of the airbag 14 includes the bent portion 29 at the upper end 28a of the receiving surface 28, but the connecting cloth portion is in a state where the bent portion 29 is not provided. However, since the receiving surface 28 is moved along the substantially horizontal direction by the folding shape of the airbag 14 of the movement guide means T, the same operation and effect can be obtained. Of course, if the airbag of 3rd Embodiment has arrange | positioned the connection cloth part 27 provided with the bending part 29, the effect | action and effect of 1st Embodiment can also be acquired.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic longitudinal sectional view of a passenger seat airbag device according to a first embodiment of the present invention in a vehicle longitudinal direction. It is the perspective view of the state which expanded the airbag used for the passenger-side airbag apparatus of 1st Embodiment alone, and is the perspective view seen from the front side. It is the perspective view of the state which expanded the airbag used for the airbag apparatus for passenger seats of 1st Embodiment alone, and is the perspective view seen from the back side. It is a longitudinal cross-sectional view of the airbag of 1st Embodiment, and respond | corresponds to the IV-IV site | part of FIG. It is a cross-sectional view of the airbag of 1st Embodiment, and respond | corresponds to the VV site | part of FIG. It is an expanded view of the member which comprises the airbag of 1st Embodiment. It is a figure explaining the use condition of the airbag of a 1st embodiment, and it is the figure seen from the vehicles back side which shows the state where inflation was completed. It is a figure explaining the use condition of the air bag of a 1st embodiment, and is the schematic seen from the upper part of vehicles which shows the state where inflation was completed. It is a schematic longitudinal cross-sectional view of the vehicle front-back direction which shows the time of completion | finish of operation | movement of the airbag apparatus for passenger seats of 1st Embodiment. It is a schematic longitudinal cross-sectional view of the vehicle front-back direction which shows the use condition of the modification of the airbag of 1st Embodiment. It is a partial fracture perspective view of an air bag used for a 2nd embodiment. It is a schematic longitudinal cross-sectional view of the vehicle front-back direction which shows the time of the action | operation of the airbag apparatus for passenger seats of 2nd Embodiment. It is a figure explaining the folding process of the airbag of 3rd Embodiment. It is a schematic longitudinal cross-sectional view of the vehicle front-back direction which shows sequentially the time of the action | operation of the airbag apparatus for passenger seats of 3rd Embodiment. It is a figure explaining the modification of the folding process of the airbag of 3rd Embodiment. FIG. 16 is a schematic longitudinal sectional view in the vehicle front-rear direction sequentially illustrating the time of operation of the passenger seat airbag device using the airbag illustrated in FIG. 15.

Explanation of symbols

1 ... Instrument panel (instrument panel),
6 ... (storage part) case,
14.14A ... Airbag,
22 ... Left shoulder restraint,
23 ... right shoulder restraint,
25. Storage recess,
27. Connecting cloth part,
28 ... the receiving surface,
28a ... upper end,
29.29A ... bent portion,
40 ... Gas flow conditioner,
T: Movement guide means,
P ... Crew,
N ... Neck,
M1, M2, M3 ... Airbag devices for passenger seats.

Claims (2)

An airbag that protrudes rearward from the instrument panel storage site in front of the passenger seat of the vehicle and completes inflation;
The airbag is disposed so as to protrude rearward on both the left and right sides of the rear surface side by side and be arranged side by side in the left and right direction. The storage recess disposed between the restraining portions and recessed to the front side so as to be able to be received by intruding the occupant's head and the storage to prevent the left and right shoulder restraining portions from being separated from each other in the left-right direction. An airbag device for a passenger seat configured to include a connecting cloth portion disposed on a front side of the shoulder restraining portion, which is the back side of the concave portion, and provided with a receiving surface substantially along the vertical direction. There,
The airbag device for a passenger seat is characterized in that the connecting cloth portion of the airbag is provided with a bent portion bent forward at the upper end side of the receiving surface. An airbag that protrudes rearward from the instrument panel storage site in front of the passenger seat of the vehicle and completes inflation;
The airbag is disposed so as to protrude rearward on both the left and right sides of the rear surface side by side and be arranged side by side in the left and right direction. The storage recess disposed between the restraining portions and recessed to the front side so as to be able to be received by intruding the occupant's head and the storage to prevent the left and right shoulder restraining portions from being separated from each other in the left-right direction. An airbag device for a passenger seat configured to include a connecting cloth portion disposed on a front side of the shoulder restraining portion, which is the back side of the concave portion, and provided with a receiving surface substantially along the vertical direction. There,
When the airbag is deployed and inflated from the storage part of the instrument panel, at least the receiving surface of the connecting cloth portion of the airbag is from the previous stage when the airbag is completely inflated to when the airbag is completely inflated. An airbag device for a passenger seat, characterized in that movement guide means for moving along a substantially horizontal direction is arranged.

Images