JP4089552B2 - Airbag device - Google Patents

Description

  The present invention relates to an airbag device equipped in a vehicle such as an automobile.

  An airbag device mounted on a passenger seat of a vehicle such as an automobile includes an inflator and a case (reaction can) that accommodates the airbag, and an airbag chute member that has a lid portion that opens when the airbag is deployed. The airbag chute member is provided on the instrument panel on the passenger seat side. The case is fixed to a vehicle body member such as a deck cloth.

  In this type of airbag device, in order to assemble the case and the airbag chute member to each other, a bracket member (pressing member) may be used as described in Patent Document 1 below.

  A conventional airbag device using a bracket member has a convex portion 3 formed on the peripheral wall 2 of the case 1 as shown in FIG. A fitting hole 6 into which the convex portion 3 is inserted is formed in the frame portion 5 of the airbag chute member 4, and an attachment hole 7 is formed in the convex portion 3. The insertion portion 9 of the bracket member 8 is inserted into the mounting hole 7 to fix the bracket member 8 to the case 1.

The bracket member 8 prevents the convex portion 3 of the case 1 from coming out of the fitting hole 6 of the airbag chute member 4. Therefore, when the airbag B (only a part of which is shown in FIG. 7) is deployed, The bag chute member 4 can be securely held in the case 1.
JP 2003-25942 A

  In the conventional airbag device, there is a slight gap A between the peripheral wall 2 of the case 1 and the frame portion 5 of the airbag chute member 4. For this reason, when inserting the insertion part 9 of the bracket member 8 into the mounting hole 7 of the convex part 3, an operator mistakenly inserts the insertion part 9 of the bracket member 8 into the gap A, and does not notice the erroneous insertion. There is a concern that the bracket member 8 is assembled to the case 1 as it is.

  Accordingly, an object of the present invention is to provide an airbag device that can prevent the bracket member from being assembled by mistake.

  The airbag device of the present invention includes a case having a peripheral wall that accommodates the airbag, a convex portion formed on the outer surface of the peripheral wall, a lid portion that is opened when the airbag is deployed, and a back surface side of the lid portion. An air bag chute member in which a fitting hole into which the convex portion is inserted is formed in the frame portion, and an insertion portion to be inserted into an attachment hole formed in the convex portion. A bracket member that is fixed to the case so as to overlap the outer surface of the frame portion in a state where the insertion portion is inserted into the mounting hole. Further, the bracket member has a misassembly prevention convex portion that abuts against an edge of the frame portion when the insertion portion is erroneously inserted into a gap between the peripheral wall of the case and the frame portion of the airbag chute member. Is formed.

In this inventions, the erroneous assembly preventing projections, so as to face the rising portion formed by bending a portion of said bracket member made of sheet metal, the same direction as the insertion portion from the front end side of the rising portion And a bent portion that is bent.

  According to the present invention, the bracket member is provided with a projection for preventing misassembly, and the bracket member is misassembled when the insertion portion of the bracket member is erroneously inserted into the gap between the peripheral wall of the case and the frame portion of the airbag chute member. Since the preventing convex portion is brought into contact with the edge of the frame portion, the bracket member cannot be inserted to a predetermined position at the time of erroneous insertion. For this reason, it can prevent that a bracket member will be assembled | attached accidentally.

In the present invention, since the a and the bent portion rising portion for erroneous assembly preventing protrusions may be provided to more reliably prevent the erroneous insertion of the bracket member.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
A passenger seat airbag device 10 shown in FIG. 1 is provided on an instrument panel 11 (only part of which is shown in FIG. 5) on the passenger seat side of an automobile, and protects a passenger seated in the passenger seat. The airbag device 10 includes a metal case 12 and an airbag chute member 13 attached to the instrument panel 11.

  The case 12 has a peripheral wall 17 that accommodates an inflator 15 and an airbag 16 (a part of which is shown in FIG. 5). The case 12 is fixed to a vehicle body member such as a deck cloth. A plurality of convex portions 18 projecting outward are formed on the upper surface of the peripheral wall 17. These convex portions 18 are formed at predetermined intervals in the width direction of the case 12 (the width direction of the vehicle body). A mounting hole 19 is formed in the convex portion 18. An insertion portion 63 of a bracket member 60 described later is inserted into the mounting hole 19.

  As shown in FIG. 2, the airbag chute member 13 includes a pair of lid portions 31 and 32 that are opened when the airbag 16 is deployed, and a frame portion 33 that is formed on the back side of the lid portions 31 and 32. Yes. The boundary portion 34 between the lid portions 31 and 32 is thinner than other portions so as to be easily broken when the airbag 16 is deployed, but is connected to each other before the airbag 16 is deployed. .

  A plurality of fitting holes 40 are formed in the upper wall 33 a of the frame portion 33 of the airbag chute member 13. These fitting holes 40 are formed at a pitch corresponding to the convex portions 18 at positions corresponding to the convex portions 18. The protrusions 18 are inserted into these fitting holes 40.

  As shown in FIG. 4, a hook member 41 is provided on the lower surface of the case 12. The hook member 41 is inserted into a locking hole 42 formed in the lower wall 33 b of the frame portion 33 of the airbag chute member 13. The tip 41a of the hook member 41 is bent so as to face the inflator 15 side.

  As shown in FIG. 2, a hinge member 45 made of a thin metal plate is provided across one lid portion 31 located on the upper side and the upper wall 33 a of the frame portion 33. A hinge member 46 made of a thin metal plate is provided across the other lid portion 32 located on the lower side and the lower wall 33b of the frame portion 33. These hinge members 45 and 46 are insert-molded integrally with a resin portion 13a (shown in FIGS. 4 and 5) of the airbag chute member 13 when the airbag chute member 13 is molded of resin.

  As shown in FIGS. 2 and 5, one hinge member 45 includes a bent portion 45 a that functions as a hinge when the lid portion 31 opens, a first plate portion 45 b embedded in the lid portion 31, and a frame portion 33. And a second plate portion 45c attached to the inner surface of the upper wall 33a. The 2nd plate part 45c is being fixed to the upper wall 33a of the frame part 33 with the adhesive force of the resin part 13a insert-molded. A substantially rectangular opening 50 (shown in FIG. 2) is formed in the second plate portion 45c at a position corresponding to the fitting hole 40 of the upper wall 33a.

  The other hinge member 46 is also attached to the inner surface of the bent portion 46 a that functions as a hinge when the lid portion 32 is opened, the first plate portion 46 b embedded in the lid portion 32, and the lower wall 33 b of the frame portion 33. And a second plate portion 46c. The second plate portion 46c is fixed to the lower wall 33b of the frame portion 33 by the adhesive force of the resin portion 13a to be insert-molded. In the second plate portion 46c, an opening 51 (shown in FIG. 4) is formed at a position corresponding to the locking hole 42 of the lower wall 33b.

  As shown in FIG. 5, a cover member 55 made of an elastic resin such as urethane is provided on the surfaces of the lid portions 31 and 32. A cover material 55 made of an elastic resin is also provided on the surface of the instrument panel 11.

  The upper part of the case 12 and the upper part of the airbag chute member 13 are assembled to each other by a sheet metal bracket member 60 described below. The lower part of the case 12 and the lower part of the airbag chute member 13 are assembled together by inserting a hook member 41 into the locking hole 42 as shown in FIG.

  As shown in FIG. 3, the bracket member 60 has an elongated base portion 61, attachment portions 62 formed at both ends of the base portion 61, and a plurality of insertion portions 63. The base portion 61 is along the frame portion 33 of the airbag chute member 13. The insertion portions 63 are formed at the same pitch as the convex portions 18 along the longitudinal direction of the base portion 61.

  These insertion portions 63 have a shape that can be inserted into the mounting holes 19 formed in the convex portion 18, and protrude in front of the base portion 61. The bracket member 60 is overlapped on the outer surface of the frame portion 33 in a state where the insertion portions 63 are inserted into the mounting holes 19, and is fixed to the support portion 66 of the case 12 by a fixing member 65 (only one is shown in FIG. 1). Fixed to.

  The bracket member 60 is formed with a projection 70 for preventing wrong assembly. When the bracket member 60 is assembled, the insertion portion 63 is inserted into the gap G between the peripheral wall 17 of the case 12 and the frame portion 33 of the airbag chute member 13. Then, as shown in FIG. 6, it comes into contact with the edge 71 of the frame portion 33.

  The projection for preventing misassembly 70 is, for example, formed by press molding so that a part of the bracket member 60 is bent at a substantially right angle, and the leading end of the rising part 72 faces the same direction as the insertion part 63. Thus, it has the bending part 73 bent by the substantially right angle.

  For this reason, when the insertion part 63 is mistakenly inserted into the gap G when the bracket member 60 is assembled, the misassembly prevention convex part 70 comes into contact with the edge 71 of the frame part 33 as shown in FIG. For this reason, the bracket member 60 cannot be inserted any further. Thus, the operator can recognize that the position of the bracket member 60 is wrong, and can prevent the bracket member 60 from being assembled at the wrong position.

  In addition, since the convex portion 70 for preventing misassembly of this embodiment has a bent portion 73 on the tip side of the rising portion 72, when the insertion portion 63 is inserted into the gap G, it is forcibly pushed into the gap G with force. Even if it tries to insert, the bending part 73 will be caught by the edge 71 of the frame part 33, and it cannot insert any more. For this reason, the erroneous insertion of the bracket member 60 can be prevented more reliably. This misassembly preventing convex portion 70 can be easily formed by press molding.

The perspective view of the airbag apparatus of one Embodiment of this invention. The perspective view of the airbag chute | shoot member of the airbag apparatus shown by FIG. The perspective view of the bracket member of the airbag apparatus shown by FIG. The perspective view which shows a part of lower part of the airbag apparatus shown by FIG. Sectional drawing of the upper part of the airbag apparatus shown by FIG. Sectional drawing of the state in which the bracket member was misinserted when the airbag apparatus shown by FIG. 1 was assembled. Sectional drawing of a part of conventional airbag apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Airbag apparatus 12 ... Case 13 ... Airbag chute member 16 ... Airbag 17 ... Perimeter wall 18 ... Protruding part 19 ... Mounting hole 31, 32 ... Lid part 33 ... Frame part 40 ... Fitting hole 60 ... Bracket member 63 ... Insertion part 70 ... convex part for preventing misassembly

Claims (1)

A case having a peripheral wall for accommodating an airbag, and a convex portion formed on the outer surface of the peripheral wall;
An airbag chute member having a lid portion that is opened when the airbag is deployed and a frame portion formed on the back side of the lid portion, and a fitting hole into which the convex portion is inserted is formed in the frame portion;
A bracket member that has an insertion portion that is inserted into an attachment hole formed in the convex portion, and is fixed to the case so as to overlap the outer surface of the frame portion in a state in which the insertion portion is inserted into the attachment hole. And
The bracket member is formed with a projection for preventing misassembly when the insertion portion is erroneously inserted into a gap between the peripheral wall of the case and the frame portion of the airbag chute member. The convex portion for preventing misassembly is bent so that a part of the bracket member made of sheet metal is bent, and the leading end side of the rising part faces the same direction as the insertion part. An airbag device comprising a bent portion .

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