JP4392792B2 - Airbag device - Google Patents

Description

  The present invention relates to an airbag device, in particular, a cylindrical inflator that ejects a pressure fluid, a retainer that supports a bottom surface side of the inflator, and an air bag that is positioned on the top surface side of the inflator when engaged with the retainer. The present invention relates to an airbag apparatus including an airbag plate that clamps a bottom opening edge of a bag with the retainer.

  2. Description of the Related Art Conventionally, an airbag apparatus in which an inflator ejects a pressure fluid and inflates an airbag body with the pressure fluid at the same time as detecting an impact caused by a vehicle collision or the like is well known.

  In addition, such an airbag device includes a cylindrical inflator that ejects a pressure fluid, a retainer that supports the bottom surface side of the inflator, and an airbag body that is positioned on the top surface side of the inflator and engages with the retainer. And an airbag plate for sandwiching the bottom opening edge of the bottom plate with the retainer.

  One end of a bracket is fixed to the retainer, and the entire airbag device is fixed to the vehicle body by fixing the other end of the bracket to the vehicle body.

  Further, the airbag plate is formed with a substantially semi-cylindrical arch portion that follows the shape of the upper surface of the retainer and a flange portion that extends along both edges extending in the longitudinal direction of the arch portion. In addition, a plurality of pins that engage with the retainer in a state of penetrating a plurality of locations in the vicinity of both edges along the longitudinal direction of the bottom opening for introducing the pressure fluid formed in the airbag main body are projected from the flange portion. Yes. Further, at both ends of the airbag plate, arrowhead-shaped tongue pieces penetrating the vicinity of both edge portions along the edge direction of the bottom opening of the airbag body are formed by cutting and raising.

JP 2002-178868 A

  By the way, in the airbag device configured as described above, both the bottom side end portions of the inflator are supported by the retainer, but the top side end portions of the inflator are in a free state.

  For this reason, the positioning of the airbag plate and the inflator in the thrust direction is not stable, and there is a problem that a rattling sound may be generated due to vibration or the like when the vehicle travels.

  In order to solve the above problems, the present invention can position the airbag plate and the inflator in the thrust direction, and maintain the positioning state to generate a rattling noise caused by vibrations during vehicle travel. It is an object of the present invention to provide an airbag device that can prevent the above.

In order to achieve the object, an airbag device according to claim 1 includes an airbag main body, a columnar inflator for injecting a pressure fluid into the airbag main body, and a retainer for supporting a bottom surface side of the inflator. , a bottom opening edge portion of the airbag body in engagement with the retainer located on the upper surface side of the inflator while held between the retainer, and a air bag plate having openings for gas passage In the airbag apparatus, slits provided in the vicinity of both edge portions along the edge direction of the bottom opening of the airbag body, elongated holes formed at positions substantially coincident with both ends of the inflator in the retainer, and the airbag In the assembled state of the main body, the thrust direction at both ends of the inflator in a state of passing through the slit and the long hole And gist that a tongue piece provided on the outer end portion of the airbag plate so as to position.

  The airbag device according to claim 2 is characterized in that the tongue piece has an arrowhead shape penetrating the vicinity of both edges along the edge direction of the bottom opening of the airbag body.

  The gist of the airbag device according to claim 3 is that the tongue piece is integrally formed by cutting and raising the airbag plate.

  According to the airbag device of the present invention, the bottom surface side of the cylindrical inflator that ejects the pressure fluid is supported by the retainer, and the airbag plate positioned on the top surface side of the inflator is engaged with the retainer and at the same time the bottom surface of the airbag body. The opening edge is sandwiched between the airbag plate and the retainer, and the tongue piece that contacts both ends of the inflator is provided on the airbag plate, thereby positioning the airbag plate and the inflator in the thrust direction with the tongue piece. And the positioning is maintained.

  Further, according to the airbag device of the present invention, the tongue piece is formed in the shape of an arrowhead that penetrates the vicinity of both edges along the edge direction of the bottom opening of the airbag body, so that it follows the edge direction of the bottom opening. Both edges are positioned by the tongue.

  Furthermore, according to the airbag device of the present invention, the tongue piece is integrally formed by cutting and raising the airbag plate, thereby positioning the airbag plate and the inflator in the thrust direction without increasing the number of parts. It can be carried out.

  Next, the airbag apparatus of this invention is demonstrated based on drawing.

  1 is a cross-sectional view of an airbag device of the present invention, FIG. 2 is a perspective view of an airbag plate, FIG. 3A is a perspective view of an airbag body, and FIG. 3B is a bottom surface of a main part of the airbag body. 4A is a side view of the airbag device of the present invention, and FIG. 4B is a front view of the airbag device of the present invention.

  In FIG. 4, an airbag device 1 includes a retainer 3 provided with a plurality of brackets 2 for fixing to a vehicle body (not shown), a cylindrical inflator 4 supported on the bottom side by the retainer 3, and an upper surface side of the inflator 4. And an airbag main body 6 sandwiched between the retainer 3 and the airbag plate 5.

  When the inflator 4 is actuated to eject the pressure fluid, the airbag body 6 is inflated and deployed by introducing the pressure fluid from the bottom opening 6a as shown in FIG. Further, a total of five through holes 6b are formed in the vicinity of the opening edge along the longitudinal direction at the opening edge of the bottom surface opening 6a, and one slit 6c is formed in the vicinity of both edges along the edge direction. Has been.

  As shown in FIG. 1, the retainer 3 includes a substantially case-shaped upper retainer 7 and a lower retainer 8 fixed inside the upper retainer 7. In the upper retainer 7, the airbag body 6 is folded and stored so as to be inflated and deployed in a predetermined order. Further, the lower retainer 8 has a central portion recessed by punching or the like so as to be positioned on the bottom surface side and the top surface side of the inflator 4, and the central portion 8a on the bottom surface side is curved in a semi-hexagonal cross section. Both end portions 8b are formed in a semicircular shape. In addition, elongated holes 8 c are formed at both end portions located on the upper surface side of the inflator 4 at positions that substantially coincide with both ends of the inflator 4.

  The inflator 4 is a device that generates gas for inflating and deploying the airbag body 6. This inflator 4 itself can use what was provided conventionally. For example, the inflator 4 has a compressed gas system and a combustion gas system, and is appropriately selected and used.

  The airbag plate 5 is for fixing the airbag body 6 and the inflator 4 inside the retainer 3. As shown most clearly in FIG. 2, the airbag plate 5 has a semicircular arch-shaped arch portion 5a and flange portions 5b formed at both edges along the longitudinal direction of the arch portion 5a. .

  Four rectangular openings 5c through which gas from the inflator 4 passes are formed at the center of the arch portion 5a. Further, an arrowhead-shaped tongue piece 5d is cut and formed at the left and right outer ends of the arch portion 5a. The tongue piece 5d passes through the slit 6c of the airbag body 6. In addition, the tongue piece 5d abuts against both end faces of the inflator 4 in a state of passing through the long hole 8c in the assembled state. Thereby, both ends of the inflator 4 are positioned.

  The flange portion 5b is provided with a bolt portion 5e for fixing the airbag plate 5 to the lower retainer 8 with a nut 9 after passing through a through hole 6b of the airbag body 6 and a through hole (not shown) provided in the lower retainer 8. It has been.

  Next, the assembled state of the airbag device 1 will be described.

  In the airbag apparatus 1 of this embodiment, the airbag body 6 is assembled to the airbag plate 5. In this state, with the arch portion 5a facing the bottom opening 6a of the airbag body 6, the tongue piece 5d penetrates the slit 6c from the inside of the airbag body 6 and the bolt portion 5e penetrates the through hole 6b. At this time, the assembly of the airbag plate 5 and the airbag body 6 is prevented by using an odd number of bolt portions 5e (in this embodiment, five).

  Next, after the inflator 4 is supported by the lower retainer 8, the airbag plate 5 in which the airbag body 6 is integrated is disposed inside the upper retainer 7. At this time, the tongue 5d is passed through the long hole 8c of the lower retainer 8, and the bolt part 5e is passed through the through hole.

  Thereby, the peripheral edge portion of the bottom opening 6a of the airbag body 6 is sandwiched between the airbag plate 5 and the lower retainer 8, and both ends of the inflator 4 are positioned by the tongue piece 5d.

  Then, by completely tightening the nut 9 to the bolt part 5e, the airbag body 6 is completely clamped between the airbag plate 5 and the lower retainer 8, and the inflator 4 is sandwiched between the lower retainer 8 and the airbag plate 5. It is fixed in the state.

  The airbag device 1 is fixed in the vehicle body by a bracket 2. For example, when used as a passenger seat airbag device (for head, upper body, and lower foot), it is fixed in the instrument panel of the vehicle.

  In such an airbag device 1, the airbag body 6 is normally folded and accommodated in the upper retainer 7 while being folded. When a vehicle collides from this state, a sensor (not shown) detects this, and an ignition signal is sent to the inflator 4 so that pressure fluid is ejected from the inflator 4. The jetted pressure fluid passes through the rectangular opening 5 c of the airbag plate 5 and is supplied into the airbag body 6.

It is sectional drawing of the airbag apparatus of this invention. It is a perspective view of the airbag plate which comprises the airbag apparatus of this invention. (A) is a perspective view of an airbag main body, (B) is a bottom view of the principal part of an airbag main body. (A) is a side view of the airbag apparatus of this invention, (B) is a front view of the airbag apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Airbag apparatus 3 ... Retainer 4 ... Inflator 5 ... Airbag plate 5d ... Tongue piece 6 ... Airbag main body 7 ... Upper retainer 8 ... Lower retainer

Claims (3)

The airbag body, an inflator cylindrical for ejecting pressurized fluid to the air bag body, and a retainer for supporting a bottom side of said inflator, upon engagement with the retainer located on the upper surface side of said inflator In an airbag apparatus comprising an airbag plate having an opening for gas passage while holding a bottom opening edge of the airbag body with the retainer,
Slits provided in the vicinity of both edges along the edge direction of the bottom opening of the airbag body,
An elongated hole formed at a position substantially coinciding with both ends of the inflator in the retainer;
In the assembled state of the airbag main body, a tongue piece provided on the outer end portion of the airbag plate so as to perform positioning in the thrust direction of both ends of the inflator while passing through the slit and the elongated hole. An airbag device comprising the airbag device.   2. The airbag device according to claim 1, wherein the tongue piece has an arrowhead shape penetrating the vicinity of both edges along the edge direction of the bottom opening of the airbag body. The airbag device according to claim 1 or 2, wherein the tongue piece is formed integrally with the airbag plate by cutting and raising.

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