JP2006327505A - Airbag device for front passenger seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an airbag device for a front passenger seat surely holding an airbag body in a predetermined position from the initial stage of inflation and development to the completion of development of the airbag body. <P>SOLUTION: In the airbag device for the front passenger seat, the airbag 6 is normally stored in an instrument panel 1 in a folded state, the airbag 6 can be inflated and developed to the outside of the instrument panel 1 by evolved gas from an inflator 7. The airbag 6 is composed of airbag bodies 15, 16 receiving an occupant in an inflation development state, and a small bag part 15d which is formed on the airbag body 15, abuts on a sun visor 17, and holds the posture of the airbag bodies 15, 16 in a stable state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a passenger airbag device.

As a conventional airbag device for a passenger seat of an automobile, for example, an airbag main body is divided into a main inflating portion and a sub inflating portion, each of which is a separate folding system. Is deployed on the inner surface side of the front wind panel, and the main inflatable portion is inflated and deployed toward the passenger side with a delay (for example, Patent Document 1).
JP 2000-272465 A

  However, in such a conventional technique, since the one inflating part of the airbag body is divided into a main inflating part and a sub-inflating part according to the way of folding, the folding method of the air bag body is troublesome, There is a risk of requiring a large amount of man-hours. Also, when the airbag body is inflated and deployed, it is divided into a main inflation part and a sub-inflation part until the middle stage, but the airbag body is stably held in place at all stages until the inflation and deployment are completed. It is difficult to keep.

  The present invention has been made by paying attention to such a conventional technique, and is used for a passenger seat that can reliably hold the airbag body in a predetermined position from the initial stage of the inflation and deployment to the completion of the deployment. An airbag device is provided.

  According to the first aspect of the present invention, an airbag for a passenger's seat that is always housed in a state where the airbag is folded in the instrument panel, and that the airbag can be inflated and deployed outside the instrument panel by the gas generated from the inflator. The airbag includes an airbag body that can receive an occupant in an inflated and deployed state, and an airbag body that is formed on the airbag body and abuts against a vehicle body component member to maintain a stable posture of the airbag body. It is characterized by comprising at least a possible sachet part.

  The invention according to claim 2 is the passenger seat airbag device according to claim 1, wherein the sachet portion can be brought into contact with any one of an inner surface of a front wind panel, a passenger compartment ceiling member, and a sun visor. It is formed by protruding from the upper surface of the airbag body.

  According to a third aspect of the present invention, there is provided the passenger seat airbag device according to the first aspect, wherein the sachet portion projects from the left and right side surfaces of the airbag body so as to be able to contact the surface of the instrument panel. It is characterized by being made.

  According to the first aspect of the present invention, the airbag is capable of receiving an occupant in an inflated and deployed state, and the airbag body is formed on the airbag body and abuts against the vehicle body constituting member to stabilize the posture of the airbag body. Since the airbag main body is configured at least by the small bag portion that can be held in the state of being inflated, the airbag main body can be reliably held at a predetermined position by the small bag portion from the initial stage of the inflation and deployment to the completion of the deployment.

  According to the invention of claim 2, the sachet portion is formed so as to protrude from the upper surface of the airbag body so as to be in contact with any of the inner surface of the front wind panel, the ceiling member of the passenger compartment, and the sun visor. From the initial stage of inflation and deployment of the airbag body to the completion of deployment, the sachet is supported on any of the inner surface of the front wind panel, cabin ceiling member, or sun visor. Can be effectively suppressed.

  According to a third aspect of the present invention, the sachet portion is formed so as to protrude from the left and right side surfaces of the airbag body so that the sachet portion can come into contact with the surface of the instrument panel. From the initial stage of deployment to the completion of deployment, the state supported by the instrument panel surface is maintained, and it is possible to effectively suppress the vertical swing and movement of the airbag body.

  An object of the present invention is to provide an airbag device for a passenger seat that can securely hold an airbag body in a predetermined position from the initial stage of inflation and deployment to the completion of deployment. An airbag device for a passenger's seat that is always stored in a folded state and is capable of inflating and deploying the airbag out of the instrument panel by gas generated from an inflator, wherein the airbag is inflated and deployed And at least an air bag main body that can receive an occupant and a small bag portion that is formed in the air bag main body and abuts against a vehicle body constituent member and can maintain the posture of the air bag main body in a stable state. It was realized. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 3 are views showing a first embodiment of the present invention.

  Reference numeral 1 in this embodiment is an instrument panel, and a front window panel 2 which is one of “vehicle body constituent members” is positioned above the instrument panel. An upper end portion of the front window panel 2 is supported by a joint portion between the roof 20 and the front roof rail 18 via a seal member 21.

  An opening 22 is formed at a position corresponding to the front side of the passenger seat (not shown) of the instrument panel 1, and the airbag module 4 is installed in the opening 22.

  The airbag module 4 mainly includes an upper lid 3, a case 5, an airbag 6, an inflator 7, and a lower lid 8. The upper lid 3 and the lower lid 8 are continuously formed before the thin-walled cleavage portion 12 is cleaved. The case 5 has a metal upper opening type container shape, and is firmly fixed to the unillustrated reinforcement of the instrument panel 1. A hook 9 is formed at the upper end of the case 5, and the hook 9 is engaged with legs 10, 10 that are suspended from the back surfaces of the upper lid 3 and the lower lid 8. Further, the end portions of the upper lid 3 and the lower lid 8 are placed on the peripheral portion of the opening 22 of the instrument panel 1 and are suspended from the back surfaces of the upper lid 3 and the lower lid 8. Since the claw portions 11 and 11 are engaged with the edge portion of the opening 22, the upper lid 3 and the lower lid 8 are held by the instrument panel 1 in a stable state without rattling. Yes.

  Reference numeral 7 denotes an inflator, which is stored at the bottom of the case 5. The inflator 7 obtains a signal from a sensor (not shown) for sudden braking such as a collision, and ejects high-pressure gas. A mid retainer 13 is bridged around the middle part of the inner surface of the case 5. A plurality of holes (not shown) are formed in the mid retainer 13 so that gas from the inflator 7 can pass therethrough.

  The airbag 6 is housed in the upper part of the mid retainer 13. The gas inlet 14 of the airbag 6 is fixed while being sandwiched between the mid retainer 13 and the inner surface of the case 5.

  The airbag 6 is in contact with an upper cloth 15 and a lower cloth 16 that are airbag bodies that can receive an occupant in an inflated and deployed state, and a sun visor 17 that is formed on the upper cloth 15 and is a vehicle body constituting member. The upper cloth 15 and the lower cloth 16 are configured by at least a sachet portion 15d that can hold the posture of the upper cloth 15 and the lower cloth 16 in a stable state.

  The upper cloth 15 has a main portion 15a, side portions 15b and 15b formed at the left and right ends of the main portion 15a, and points A and C (see FIG. 3 (FIG. 3 (B)) that are contact points of the main portion 15a and the side portion 15b. b)) to a B point and a D point, a small bag portion 15d and a ceiling portion 15c hanging from the B point and the D point of the small bag portion 15d.

  The sachet portion 15d is folded at a point E and a point F shown in FIG. 3B to form a sachet as shown in FIG. Naturally, the small bag portion 15d is sewn at both left and right end portions. Further, the lower edges of the side portions 15b and 15b are formed in an upper chord arc shape as shown in FIG. 3 (b), and when assembled, they are as shown in FIG.

  The lower cloth 16 includes a main part 16a in which a gas inlet port 14 is formed, side parts 16b and 16b formed on both right and left ends of the main part 16a, and contacts between the main part 16a and the side part 16b. It comprises a bottom portion 16c that is suspended. By sewing the upper cloth 15 and the lower cloth 16, a bag shape as shown in FIG. 2 is formed. The lower edges of the side portions 16b and 16b are formed in an upper chord arc shape as shown in FIG. 3A, and when assembled, the side edges 16b and 16b are as shown in FIG. Thus, since the airbag 6 is formed by two cloths, the upper cloth 15 and the lower cloth 16, it is easy to manufacture and inexpensive.

  Next, the inflation and deployment behavior of the airbag 6 will be described.

  When a sudden braking is applied to the vehicle body, such as when an automobile collides, a sensor (not shown) is activated to activate the inflator 7, and the high-pressure gas ejected from the inflator 7 is guided to the gas inlet 14 of the airbag 6 to the air. The bag 6 is inflated. When the internal pressure of the airbag 6 increases sufficiently, the upper lid 3 and the lower lid 8 are cleaved from the cleaving portion 12, and the airbag 6 is inflated and deployed outside the instrument panel 1. At this time, since the volume of the small bag portion 15d is much smaller than the portion formed by the upper cloth 15 and the lower cloth 16 that are the airbag main body, the small bag portion 15d is inflated and solidified first, and the outer side together with the upper cloth 15 and the lower cloth 16 that are the air bag main body. When inflated and deployed, the sun visor 17 is abutted and locked. Of course, the airbag 6 itself is further inflated and deployed because the airbag 6 itself becomes a bag shape that can be received by the occupant by the gas from the inflator 7, but the state in contact with and locking to the sun visor 17 is maintained. The upper cloth 15 and the lower cloth 16 that are the main body are effective against the vertical movement and movement of the upper cloth 15 and the lower cloth 16 that are the air bag main body by the small bag portion 15d from the initial stage of the inflation and deployment to the completion of the deployment. And can be reliably held at a predetermined position.

  When the internal pressure of the airbag 6 reaches a predetermined value, the internal gas is exhausted from a well-known vent hole (not shown), and control is performed so that the internal pressure of the airbag 6 does not increase too much. And the passenger | crew who falls forward can be reliably received with the airbag 6 of appropriate pressure.

  4 to 6 are views showing a second embodiment of the present invention. The same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  An opening 22 is formed at a position corresponding to the front side of a passenger seat (not shown) of the instrument panel 1, and an airbag module 24 is installed in the opening 22.

  The airbag module 24 mainly includes an upper lid 3, a case 5, an inflator 7, a lower lid 8 (the same as the first embodiment so far), and an airbag 26.

  The airbag 26 is formed by protruding from the left and right side surfaces of the upper cloth 27 and the lower cloth 28, and the upper cloth 27 and the lower cloth 28, which are airbag bodies that can receive an occupant in an inflated and deployed state. It comprises at least a sachet portion 29, 30 that abuts against the surface of the instrument panel 1 as a constituent member and can maintain the posture of the upper cloth 27 and the lower cloth 28 as the airbag body in a stable state.

  The upper cloth 27 includes a main part 27a, side parts 27b and 27b formed at both right and left ends of the main part 27a, and a ceiling part 27c that is suspended from the contact points of the main part 27a and the side part 27b. . The side portions 27b and 27b are respectively formed with the aforementioned small bag portions 29 and 29 protruding.

  The lower cloth 28 includes a main part 28a in which the gas introduction port 14 is formed, side parts 28b and 28b formed on the left and right ends of the main part 28a, and contacts between the main part 28a and the side part 28b. It comprises a bottom portion 28c that is suspended. The side portions 28b and 28b are respectively formed with the aforementioned small bag portions 30 and 30 protruding.

  By sewing the upper cloth 27 and the lower cloth 28, a bag shape as shown in FIGS. 4 and 5 is formed. The lower end edges of the side portions 27b and 28b are formed in an upper chord arc shape as shown in FIG. 6, and when assembled, they are as shown in FIG. Thus, since the airbag 6 is formed by two cloths, the upper cloth 15 and the lower cloth 16, it is easy to manufacture and inexpensive.

  Next, the inflation and deployment behavior of the airbag 26 will be described.

  When sudden braking is applied to the vehicle body, such as when an automobile collides, a sensor (not shown) is activated to activate the inflator 7, and the high-pressure gas ejected from the inflator 7 is guided to the gas inlet 14 of the airbag 26 and air The bag 26 is inflated. When the internal pressure of the airbag 26 increases sufficiently, the upper lid 3 and the lower lid 8 are cleaved from the cleaving portion 12, and the airbag 26 is inflated and deployed outside the instrument panel 1. At this time, the sachets 29 and 30 have a much smaller volume than the portions formed by the upper cloth 27 and the lower cloth 28 which are the airbag main bodies, so that they expand and solidify first, and the upper cloth 27 and the lower cloth 28 which are the air bag main bodies. At the same time, when inflating and deploying outward, the instrument panel 1 is stretched and locked on the surface as if it were two legs. Of course, the airbag 26 itself is further inflated and deployed because it becomes a bag shape that can be received by the occupant by the gas from the inflator 7, but the state of being in contact with and locked to the instrument panel 1 is maintained. The upper cloth 27 and the lower cloth 28, which are the airbag main body, are swung and moved in the vertical direction by the small bag portions 29, 30 from the initial stage of the inflation and deployment to the completion of the deployment. On the other hand, it can suppress effectively and can hold | maintain reliably in a predetermined position.

  When the internal pressure of the airbag 26 reaches a predetermined value, the internal gas is exhausted from a well-known vent hole (not shown), and control is performed so that the internal pressure of the airbag 26 does not increase too much. And the passenger | crew who falls forward with the airbag 26 of appropriate pressure can be received reliably.

  In the above embodiment, the example in which the airbag 6 is locked to the sun visor 17 has been described. However, the present invention is not limited to this, and the airbag 6 may be locked to the inner surface of the front wind panel 2 or the vehicle interior ceiling member. It may be one that engages with 19. Further, in FIG. 1, the airbag 6 is locked to the rotating shaft 17 a side of the sun visor 17, but is not limited to this. In the state of FIG. 1, that is, in the state of FIG. An appropriate position may be used, and the sun visor 17 may be engaged with the rear side.

Sectional drawing which shows the airbag expansion state of the airbag apparatus which concerns on 1st Example of this invention. The perspective view which shows the inflated state of the airbag of FIG. The top view which shows the upper fabric (b) and lower fabric (a) of the airbag of FIG. 2, respectively. The perspective view equivalent to FIG. 2 of the airbag of the airbag apparatus which concerns on 2nd Example of this invention. Sectional drawing which shows the relationship between the airbag of FIG. 4, and an instrument panel. The top view which shows each the upper fabric (b) and lower fabric (a) of the airbag of FIG.

Explanation of symbols

1 Instrument panel 2 Front window panel (body component)
4,24 Airbag module 6,26 Airbag 7 Inflator 14 Gas inlet 15.27 Upper cloth 16, 28 Lower cloth 15d, 29, 30 Small bag part 17 Sun visor (body component)
19 Car interior ceiling member (body component)

Claims (3)

An airbag device for a passenger seat that is always stored in a state in which an airbag is folded in an instrument panel, and that the airbag can be inflated and deployed outside the instrument panel by gas generated from an inflator,
The airbag includes an airbag main body that can receive an occupant in an inflated and deployed state, and a small bag portion that is formed on the airbag main body and abuts against a vehicle body constituent member and can maintain the posture of the airbag main body in a stable state. An airbag device for a passenger seat, wherein the airbag device is configured at least. The airbag device for a passenger seat according to claim 1,
The airbag device for a passenger seat is characterized in that the sachet portion is formed so as to protrude from the upper surface of the airbag body so as to be in contact with any one of the inner surface of the front wind panel, the ceiling member of the passenger compartment, and the sun visor. The airbag device for a passenger seat according to claim 1,
The airbag device for a passenger seat, wherein the sachet portion is formed so as to protrude from the left and right side surfaces of the airbag body so as to be able to contact the surface of the instrument panel.

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