JP4940821B2 - Air bag device and retainer thereof - Google Patents

Description

  The present invention relates to a retainer for accommodating an airbag of an airbag device, and in particular, includes a bottom surface portion and a peripheral wall portion erected forward from the periphery of the bottom surface portion, near the center of the bottom surface portion. The present invention relates to a container-like retainer to which an inflator is attached. Moreover, this invention relates to the airbag apparatus provided with this retainer.

  A passenger seat airbag device installed in an instrument panel of a vehicle includes an airbag, a container-like retainer that accommodates the airbag, an inflator for inflating the airbag, and the like.

  FIG. 4 of Japanese Patent Application Laid-Open No. 2004-1636 describes a box-shaped retainer having a flat bottom surface portion. FIG. 9 is a longitudinal sectional view schematically showing the configuration of the airbag apparatus provided with a retainer having a flat bottom portion as described above.

  The retainer 110 is erected from a flat bottom surface portion 111 over substantially the entire surface and from the periphery of the bottom surface portion 111 to the front (the occupant side in a state where the airbag device 100 is installed in the vehicle; the same applies hereinafter). The peripheral wall 112 is open and opens forward. An inflator attachment port 113 is provided near the center of the bottom surface portion 111 so as to penetrate the bottom surface portion 111. Further, a bolt insertion hole (not shown) is provided around the inflator attachment port 113 so as to penetrate the bottom surface portion 111.

  The airbag apparatus 100 includes the retainer 110, an airbag 120 accommodated in the retainer 110, an inflator 130 for inflating the airbag 120, and the like.

  The inflator 130 has a substantially cylindrical shape, and a plurality of gas outlets 131 are provided on the side peripheral surface on the distal end side in the cylinder axis direction. A flange 132 for fixing the inflator protrudes from a side peripheral surface of the midway portion of the inflator 130 in the cylinder axis direction (the rear end side of the gas ejection port 131). The inflator 130 is fitted into the inflator attachment port 113 from the rear side of the bottom surface portion 111, and the flange 132 is overlapped with the peripheral portion of the inflator attachment port 113. The flange 132 is provided with bolt insertion holes (not shown) in a positional relationship overlapping with the bolt insertion holes around the inflator attachment port 113.

  Although schematically shown in FIG. 9, the airbag 120 has a rear end (the end opposite to the occupant when the airbag 120 is inflated in a state where the airbag device is installed in the vehicle). Hereinafter, the side opposite to the occupant is referred to as a rear side.) The gas inlet 121 is provided on the side. A bolt insertion hole (not shown) is provided around the gas introduction port 121 so as to overlap with the bolt insertion hole around the inflator mounting port 113.

  A presser ring 140 for fixing the airbag 120 to the retainer 110 is disposed inside the airbag 120. A stud bolt 141 protrudes from the presser ring 140, and the stud bolt 141 is inserted into the bolt insertion hole of the airbag 120 and protrudes outside the airbag 120.

  The airbag 120 is previously folded in accordance with the internal shape of the retainer 110 and is in a state of being retained by a shape retaining member (not shown).

  When attaching the airbag 120 to the retainer 110, the peripheral portion of the gas inlet 121 is overlapped with the peripheral portion of the inflator attachment port 113 of the bottom surface portion 111 and pressed from above (inside the airbag 120). The rings 140 are overlapped. At this time, the front end side (gas outlet 131) of the inflator 130 fitted in the inflator attachment port 113 is disposed in the airbag 120 through the inside of the gas introduction port 121 and the holding ring 140. At this time, the stud bolt 141 of the presser ring 140 is inserted through the bottom surface portion 111 and the bolt insertion holes of the flange 136. Then, the nut 142 is fastened to the front end side of the stud bolt 141. Thereby, the rear end of the airbag 120 and the inflator 130 are fixed near the center of the bottom surface portion 111.

  Thereafter, a lid 150 (illustrated schematically by a two-dot chain line in FIG. 9) is mounted so as to cover the front side of the retainer 110, whereby the airbag apparatus 100 is configured. However, instead of mounting the lid 150, an area as a lid may be provided on the instrument panel (not shown), and the retainer 110 may be disposed directly on the back side.

When a vehicle equipped with the airbag device 100 encounters an emergency such as a collision, the inflator 130 operates to inject gas, and the airbag 120 starts to be inflated by the gas from the inflator 130. And this airbag 120 expands between an instrument panel and a passenger seat passenger | crew by cleaving the lid 150 (or the area | region as a lid of an instrument panel. Hereinafter, the same), and receives this passenger | crew.
JP 2004-1636 A

As shown in FIG. 9, in the retainer 110 having the flat bottom surface portion 111, the bottom surface portion 111 and the peripheral wall portion 112 surrounding the bottom surface portion 111 intersect with each other at a substantially right angle. Even when the airbag 120 is folded in accordance with the internal shape, the folded body of the airbag 120 has a rounded shape as a whole. Therefore, when the folded body of the airbag 120 is disposed inside the retainer 110, as shown in the figure, the vicinity of the side portion of the folded body of the airbag is lifted from the bottom surface portion 111, and a gap (dead space) S _{1 is formed} therebetween. Will occur.

In addition, since the front end side of the inflator 130 protrudes from the vicinity of the center of the bottom surface portion 111 of the retainer 110 into the retainer 110, when the folded body of the airbag 120 is disposed inside the retainer 110, the vicinity of the center of the folded body is It is pushed forward by the tip side of the inflator 130 and approaches the lid 150. Since the positional relationship between the lid 150 and the retainer 110 is set based on the distance between the center of the folded body of the airbag 120 and the lid 150, the air that is not pushed forward by the inflator 130 as shown in FIG. side of the folded body of the bag 120 is spaced apart from the lid 150, the dead space S ₂ also occurs between them.

Thus, the dead space S _1, S ₂ is present between the bottom portion 111 and the lid 150 side and the retainer 110 of the folded body of the airbag 120, when the airbag 120 starts expansion In addition, the expansion pressure is less likely to act evenly on the entire lid 150, which may cause the lid 150 not to be cleaved smoothly.

Further, the volume of the retainer 110 is unnecessarily large by the amount of these dead spaces S ₁ and S ₂ .

  An object of this invention is to provide the retainer which can reduce an internal dead space, and the airbag apparatus provided with this retainer.

A retainer of the present invention (Claim 1) is a retainer for accommodating an airbag of an airbag device, and includes a bottom surface portion and a peripheral wall portion erected forward from a peripheral edge of the bottom surface portion, In a retainer provided with an attachment portion to which an inflator is attached near the center of the bottom surface portion, at least a portion of the bottom surface portion between the attachment portion and the peripheral wall portion is the attachment portion. The peripheral wall is tapered so that the retainer expands toward the front, and the retainer is viewed from the front. The shape at the time is a rectangle, the central portion in the longitudinal direction of the bottom portion is the mounting portion, and both end sides in the longitudinal direction of the bottom portion are the inclined portions from the mounting portion, Each corner with the peripheral wall of the four corners of the outer periphery of the bottom surface And the respective corners where the three regions of the attachment part, the inclined part and the peripheral wall part intersect with each other are provided with openings, and the retainer is manufactured by press-molding a metal plate. it is characterized in that.

A retainer according to a second aspect is the retainer according to the first aspect, wherein an amount of forward protrusion of the inclined portion from the attachment portion on the outermost periphery of the bottom surface portion is the amount of the inflator in a state where the inflator is attached to the attachment portion. It is the same as the amount of forward protrusion from the attachment portion, or 10 to 190% of the amount of protrusion of the inflator forward from the attachment portion, and both of the slopes in the entire longitudinal width of the bottom surface portion. The ratio of the total width in the longitudinal direction of the portion is 30 to 80%, and the inclination of the peripheral wall portion in the expanding direction with respect to the vertical direction is 1 to 15 ° in a state where the mounting portion is horizontally disposed. it is characterized in that.

A retainer according to claim 3 is the retainer according to claim 1 or 2, wherein a bracket for installing the retainer on a vehicle body member and a lid for covering an airbag accommodated in the retainer are provided on the outer surface of the retainer. And a bracket base piece portion extending perpendicularly to the outer surface of the attachment portion from the outer surface of the retainer toward the rear, and the bracket base piece portion. A bracket attaching piece to the retainer extending from the front end of the first bracket attaching piece, the bracket attaching piece extending along the outer surface of the inclined portion, and the peripheral wall portion. A second bracket mounting piece extending along the outer surface, and the first bracket mounting piece and the second bracket mounting piece are respectively fixed by the outer surface and the peripheral wall portion of the inclined portion. The hook plate is fixed to the outer surface, the hook plate is overlapped with the outer surface of the peripheral wall portion, and fixed to the outer surface of the peripheral wall portion by fixing means, and from the front end of the hook plate base piece portion has a hook portion protruding outward side of the retainer, the bracket and hook plate are those respectively, characterized by der Rukoto those produced by press molding a metal plate.

Airbag apparatus of the present invention (Claim 4) includes a retainer according the present invention, the airbag housed in the retainer, Ri Na and a inflator for inflating the airbag, the airbag A gas introduction port is provided on the rear end side of the inflation direction of the gas generator, the inflator is inserted into the airbag from the gas introduction port, and the peripheral portion of the gas introduction port of the airbag is the bottom surface of the retainer. The airbag is accommodated in the retainer in a folded state, and the folded body of the airbag extends in the longitudinal direction of the bottom surface of the retainer. The side portions on both ends in the longitudinal direction of the folded body are arranged so as to overlap the front sides of the inclined portions of the bottom surface portion, respectively. .

  In the retainer and the airbag apparatus according to the present invention (Claims 1 and 4), at least the peripheral wall portion between the inflator mounting portion near the center and the peripheral wall portion around the center of the bottom surface portion of the retainer. The side portion is inclined so as to be on the front side as it is separated from the mounting portion. Therefore, when the airbag folded body is disposed in the retainer, the forward inclined portion of the bottom surface portion on the side of the peripheral wall portion approaches or abuts against the side portion of the airbag folded body. Thereby, a clearance gap does not arise between the side part of the folding body of an airbag, and the bottom face part of a retainer, or the clearance gap between these becomes a small thing compared with the case where a bottom face part is flat.

  Further, the side portion of the folded body of the airbag is pushed forward by the portion inclined to the front on the peripheral wall portion side of the bottom surface portion, whereby the side portion of the folded body and the lid (or the area as the lid of the instrument panel) (The same applies hereinafter)), a gap is not generated between them, or the gap between them is smaller than when the bottom surface is flat.

  As described above, there is no gap between the side of the airbag folded body and the bottom surface of the retainer and the lid, or the gap is small so that the front side of the airbag folded body The entire surface of the head faces the lid evenly. As a result, when the airbag starts to inflate, the inflating pressure acts substantially evenly on the entire lid. As a result, the lid can be cleaved smoothly.

  In addition, since the gap, that is, the dead space does not occur in the retainer or the dead space is small as described above, the retainer is not unnecessarily large, and the retainer and the air provided with the retainer are not used. It is also possible to reduce the bag device in size and weight and reduce the material cost.

As in the present invention , the retainer can be easily manufactured by press molding by forming the peripheral wall portion into a tapered shape so that the retainer expands toward the front. Moreover, if it is such a shape, the finished product of a retainer can be piled up so that an upper retainer may be fitted in a lower retainer. By fitting the upper retainer into the lower retainer in this way, the finished retainer can be stacked compactly during stocking or transportation, and the stability of the laminate of the finished retainer is good. It will be something.

  By manufacturing the retainer by press molding, it is not necessary to perform processing such as welding or riveting of the metal plate of the material, and the amount of the metal plate of the material is small compared to the case of manufacturing by bending. Therefore, it is possible to reduce manufacturing costs and material costs.

In the present invention, the retainer, Ri shape rectangular Katachidea when viewed from the front, the corner portion between the peripheral wall of the four corners of the outer periphery of the bottom portion, and portions with said mounting, the inclined portion and the peripheral wall By providing an opening at each corner where the three regions of the section intersect , when the metal plate of the material is pressed, the corner is less likely to crack, and a retainer can be manufactured with high yield.

  Hereinafter, embodiments will be described with reference to the drawings.

  1 is a perspective view of the retainer according to the embodiment, FIG. 2 is a plan view of the retainer, FIG. 3 is a view taken along the line III-III in FIG. 2, and FIG. 4 is IV- in FIG. FIG. 5 is an exploded perspective view of the airbag apparatus provided with the retainer, FIG. 6 is a longitudinal sectional view schematically showing the configuration of the airbag apparatus, and FIGS. It is a side view of a retainer after a hook board and a bracket were attached. 7 is a view seen from the same direction as FIG. 3, and FIG. 8 is a view seen from the same direction as FIG.

  In the following description, the front means the occupant side in a state where the airbag device is installed in the vehicle, and the rear means the side opposite to the occupant at this time.

  In this embodiment, the airbag device 1 is a passenger seat airbag device installed in an instrument panel (not shown) of a vehicle. The airbag device 1 includes an airbag 20, a retainer 10 for housing the airbag 20, an inflator 30 for inflating the airbag 20, a lid 50 that covers the front side of the retainer 10, and the like. Prepare.

  In this embodiment, the retainer 10 includes a bottom surface portion 11 having a substantially rectangular plan view shape as shown in FIG. 2 and a peripheral wall portion 12 erected forward from the four sides of the bottom surface portion 11. Have. An inflator attachment port 13 is provided near the center of the bottom surface portion 11 in the longitudinal direction so as to penetrate the bottom surface portion 11. Further, a bolt insertion hole 14 is provided around the inflator attachment port 13 so as to penetrate the bottom surface portion 11. In the bottom surface portion 11, the central region in the longitudinal direction including the inflator attachment port 13 and the bolt insertion hole 14 is an attachment portion 11 a to which the inflator 30 is attached.

  In this embodiment, the inflator attachment port 13 is a circular opening, but the shape of the inflator attachment port is not limited to this. In this embodiment, four bolt insertion holes 14 are provided at equal intervals in the circumferential direction of the inflator attachment port 13, but the number and arrangement of the bolt insertion holes 14 are not limited thereto.

  Of the bottom surface portion 11, portions on both end sides in the longitudinal direction from the attachment portion 11 a (portions between the attachment portion 11 a and the peripheral wall portions 12 on both end sides in the longitudinal direction) are respectively the peripheral wall portions 12. The inclined portion 11b is inclined so as to be closer to the front side.

  In the present invention, as shown in FIG. 6, the amount of forward protrusion P of the inclined portion 11b from the mounting portion 11a on the outermost periphery of the bottom surface portion 11 is the tip of an inflator 30 described later from the mounting portion 11a. It is preferably approximately the same as the overhanging amount H on the side, or 10 to 190%, particularly 50 to 150% of the overhanging amount H on the tip side of the inflator 30.

  Further, the entire width of the bottom surface portion 11 in the longitudinal direction (from the corner portion of one inclined portion 11b and the peripheral wall portion 12 in the longitudinal direction of the bottom surface portion 11 to the corner portion of the other inclined portion 11b and the peripheral wall portion 12) The ratio of the total width of the inclined portions 11b and 11b is preferably 30 to 80%, particularly preferably 40 to 70%.

  As shown in FIGS. 3 and 4, in this embodiment, the peripheral wall portion 12 has a tapered shape so that the retainer 10 expands forward. In the present invention, the inclination θ in the expanding direction of the peripheral wall portion 12 with respect to the vertical direction when the retainer 10 (mounting portion 11a of the bottom surface portion 11) is horizontally disposed is 1 to 15 °, particularly 3 to 13 °. It is preferable that

  As shown in FIG. 2, each corner portion in the retainer 10 (in this embodiment, the four corners of the outer periphery of the bottom surface portion 11, and the three regions of the mounting portion 11a, the inclined portion 11b, and the peripheral wall portion 12 intersect. Openings 15 are provided in the respective portions.

  That is, in this embodiment, the retainer 10 has a configuration suitable for manufacturing by press molding. As described above, by forming the peripheral wall portion 12 in a tapered shape so that the retainer 10 expands forward, it becomes possible to form by a single process by press molding, simplifying the manufacturing process and reducing the manufacturing cost. Can be planned. Moreover, if it is such a shape, the completed product of the retainer 10 can be stacked | stacked so that the upper retainer 10 may be inserted in the lower retainer 10. FIG. By fitting the upper retainer 10 into the lower retainer 10 in this manner, the finished product of the retainer 10 can be compactly stacked at the time of stocking or transportation, and the finished product of the retainer 10 can be stacked. The body stability will be good.

  In addition, by providing openings 15 in portions of the metal plate of the material that will be the corners in the retainer 10 in advance, cracks occur in the corners when the metal plate of the material is pressed. It is difficult to manufacture the retainer 10 with a high yield.

  In addition, when the retainer 10 is manufactured by press molding, it is not necessary to perform processing such as welding or riveting of the metal plate of the material, and the amount of the metal plate of the material is small as compared with the case where it is manufactured by bending. Therefore, it is possible to reduce manufacturing costs and material costs.

A bracket 16 for installing the retainer 10 on a vehicle body member (not shown) and a hook plate 17 for connecting the lid 50 to the retainer 10 are attached to the outer surface of the retainer 10.

  As shown in FIGS. 7 and 8, the bracket 16 includes a base piece portion 16a extending substantially vertically downward from the lower surface of the retainer 10, and a retainer 10 extending from the upper end of the base piece portion 16a. Mounting pieces 16b and 16c. One mounting piece 16b extends along the outer surface of the inclined portion 11b, and the other mounting piece 16b extends in the longitudinal direction of the retainer 10 in the longitudinal direction of the retainer 10 (not shown). ) To extend along the outer surface. These mounting pieces 16b and 16c are fixed to the outer surfaces of the inclined portion 11b and the peripheral wall portion 12 by fixing means such as spot welding. In this embodiment, brackets 16 are provided at two locations on one half side and the other half side of the retainer 10 in the longitudinal direction.

  Moreover, as shown in FIGS. 7 and 8, the hook plate 17 is attached along the upper edges of a pair of longitudinally extending portions (reference numerals omitted) of the peripheral wall portion 12, respectively. Each hook plate 17 is superposed on the outer surface of the peripheral wall portion 12 and fixed to the outer surface of the peripheral wall portion 12 by fixing means such as spot welding, and the outer side of the retainer 12 from the base piece portion 17a. And a hook portion 17b projecting to the right. A plurality of the hook portions 17b are provided at intervals in the longitudinal direction of the retainer 10.

  These bracket 16 and hook plate 17 are also manufactured by press molding.

  In the bracket 16, since the mounting piece 16b is along the outer surface of the inclined portion 11b, the angle formed by the mounting piece 16b and the base piece portion 16a is larger than 90 ° as shown in FIG. Therefore, the bracket 16 is easy to mold.

  Further, as shown in FIG. 8, in the hook plate 17, each hook portion 17b protrudes from the peripheral wall portion 12 in a substantially horizontal direction when the retainer 10 is horizontally disposed. Since the peripheral wall portion 12 is inclined outward from the retainer 10, the angle formed between the base piece portion 17a attached to the outer surface of the peripheral wall portion 12 and each hook portion 17b is also larger than 90 °. Therefore, the hook plate 17 can be easily molded.

  In this embodiment, the inflator 30 installed on the mounting portion 11a of the retainer 10 has a substantially cylindrical shape, and a plurality of gas jets 31 are provided on the side peripheral surface on the tip side in the cylinder axis direction. ing. A flange 32 for fixing an inflator projects from a side peripheral surface of a midway portion of the inflator 30 in the cylinder axis direction (the rear end side of the gas ejection port 31). The inflator 30 is fitted to the inflator attachment port 13 from the rear side of the bottom surface portion 11, and the flange 32 is overlapped with the peripheral portion of the inflator attachment port 13. The flange 32 is provided with bolt insertion holes 33 in a positional relationship overlapping with the bolt insertion holes around the inflator attachment port 13.

  The tip side of the inflator 30 fitted in the inflator attachment port 13 protrudes into the retainer 10 from the front surface of the attachment portion 11a.

  Although schematically shown in FIG. 6, the airbag 20 has a rear end (the end opposite to the occupant when the airbag 20 is inflated when the airbag device 1 is installed in the vehicle). .) Side has a gas inlet 21. The gas introduction port 21 is an opening having substantially the same diameter as the inflator attachment port 13, and a bolt insertion hole (not shown) is disposed around the gas introduction port 21 in a positional relationship overlapping with the bolt insertion hole around the inflator attachment port 13. Is provided.

  A presser ring 40 for fixing the airbag 20 to the attachment portion 11 a of the retainer 10 is disposed inside the airbag 20. A stud bolt 41 protrudes from the presser ring 40, and the stud bolt 41 is inserted into the bolt insertion hole of the airbag 20 and protrudes to the outside of the airbag 20.

  The airbag 20 is previously folded in accordance with the internal shape of the retainer 10 and is in a state of being retained by a shape retaining member (not shown).

  When attaching the airbag 20 to the retainer 10, the peripheral edge portion of the gas inlet 21 is overlapped with the peripheral edge portion of the inflator attachment port 13 of the attachment portion 11a and pressed from above (inside the airbag 20). The rings 40 are overlapped. At this time, the distal end side (gas ejection port 31) of the inflator 30 is disposed in the airbag 20 through the inside of the gas introduction port 21 and the presser ring 40. At this time, the stud bolt 41 of the presser ring 40 is inserted into the bolt insertion holes 14 and 33 of the mounting portion 11 a and the flange 36. Then, the nut 42 is tightened on the tip side of the stud bolt 41. Thereby, the rear end of the airbag 20 and the inflator 30 are fixed to the attachment portion 11a.

  Thereafter, a lid 50 (schematically illustrated by a two-dot chain line in FIG. 6) is arranged so as to cover the front side of the retainer 10, and each hook portion 17b is engaged with the lid 50, and the lid 50 and the retainer 10 are connected. Thereby, the airbag apparatus 1 is comprised.

  The airbag device 1 is installed in an airbag device installation port (not shown) provided in the instrument panel, and is fixed to a vehicle body member (not shown) via a bracket 16.

  However, instead of mounting the lid 50 on the front side of the retainer 10, a region as a lid may be provided on the instrument panel, and the retainer 10 may be directly disposed on the back side.

  When a vehicle equipped with the airbag device 1 encounters an emergency such as a collision, the inflator 30 is operated to eject gas, and the airbag 20 starts to inflate by the gas from the inflator 30. The airbag 20 ruptures the lid 50 and inflates between the instrument panel and the passenger on the passenger seat, and receives the passenger.

  In the airbag apparatus 1 provided with the retainer 10, the space between the attachment portion 11 a near the center in the longitudinal direction of the bottom surface portion 11 of the retainer 10 and the peripheral wall portions 12 on both ends in the longitudinal direction. These portions are inclined portions 11b that are inclined so as to be on the front side as they are separated from the mounting portion 11a. Therefore, when the folded body of the airbag 20 is disposed in the retainer 10, the inclined portion 11b approaches or abuts the side portion of the folded body of the airbag. Thereby, a clearance gap does not arise between the side part of the folding body of the airbag 20, and the bottom face part 11 of the retainer 10, or the clearance gap between these becomes a small thing compared with the case where the bottom face part 11 is flat. ing.

  Further, the vicinity of the center of the folded body of the airbag 20 is pushed forward by the front end side of the inflator 30 protruding into the retainer 10 from the attachment portion 11a, but the side portion of the folded body of the airbag 20 is also It is pushed forward by the inclined portion 11b. Thereby, also between the side part of the folding body of this airbag 20, and the lid 50, a clearance gap does not arise between these, or the clearance gap between these is small compared with the case where the bottom face part 11 is flat. It will be a thing.

  In particular, in this embodiment, as shown in FIG. 6, the amount of forward protrusion P from the mounting portion 11a of the inclined portion 11b on the outermost periphery of the bottom surface portion 11 is on the tip side of the inflator 30 from the mounting portion 11a. It is substantially equivalent to the overhang amount H. Therefore, the side part of the folded body of the airbag 20 is pushed forward to the same extent as the vicinity of the center of the folded body, and substantially the entire front side of the folded body is in contact with the lid 50, or The distance between the lid 50 and the lid 50 is substantially uniform over substantially the entire front side of the folded body.

  Thus, when the airbag 20 starts to inflate, the inflation pressure acts on the entire lid 50 substantially evenly. As a result, the lid 50 is torn smoothly.

  Further, as described above, there is no gap or dead space in the retainer 10 or the dead space is small, so that the retainer 10 does not become unnecessarily large, and the retainer 10 and the retainer 10 It is also possible to reduce the size and weight of the airbag device 1 including the above and reduce the material cost.

  The above embodiment is an example of the present invention, and the present invention may take forms other than those shown in the drawings.

  For example, in the above embodiment, the both sides in the longitudinal direction of the bottom surface portion 11 of the retainer 10 are inclined portions 11b that are inclined forward, but both in the short direction (longitudinal direction and crossing direction). The side may be such an inclined part. Moreover, the circumference | surroundings of the attaching part 11a may become such an inclination part over the perimeter. Or at least one part of the circumference | surroundings of the attaching part 11a may become such an inclined part partially.

  The above embodiment is an application example of the present invention to the passenger seat airbag device and its retainer. However, the present invention is not limited to the passenger seat various airbag devices (for example, for driver seats, occupant knee restraints). It can also be applied to retainers for motorcycles, motorcycles, pedestrians, etc.).

It is a perspective view of the retainer concerning an embodiment. It is a top view of the retainer of FIG. It is the III-III arrow directional view of FIG. It is the IV-IV arrow line view of FIG. It is a disassembled perspective view of the airbag apparatus provided with the retainer of FIG. It is a schematic longitudinal cross-sectional view of the airbag apparatus of FIG. It is a side view of a retainer after a hook board and a bracket were attached. It is a side view of a retainer after a hook board and a bracket were attached. It is a schematic longitudinal cross-sectional view of the airbag apparatus which concerns on a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Airbag apparatus 10 Retainer 11 Bottom surface part 11a Attachment part 11b Inclination part 12 Peripheral wall part 13 Inflator attachment port 20 Airbag 30 Inflator 50 Lid

Claims (4)

A retainer for accommodating an airbag of an airbag device,
A bottom surface portion and a peripheral wall portion erected forward from the periphery of the bottom surface portion;
In a retainer provided with an attachment portion to which an inflator is attached in the vicinity of the substantially center of the bottom surface portion,
Of the bottom surface portion, at least the portion on the peripheral wall portion side between the attachment portion and the peripheral wall portion is an inclined portion that is inclined so as to be on the front side as being separated from the attachment portion ,
The peripheral wall portion is tapered so that the retainer expands toward the front,
The retainer has a rectangular shape when viewed from the front, the center portion in the longitudinal direction of the bottom surface portion is the mounting portion, and both end sides in the longitudinal direction of the bottom surface portion are more than the mounting portion. It is an inclined part,
Openings are respectively provided in the respective corners of the four corners of the outer periphery of the bottom part and the corners where the three regions of the attachment part, the inclined part and the peripheral wall part intersect,
The retainer is manufactured by press-molding a metal plate . In Claim 1, the amount of protrusion of the inclined portion forward from the mounting portion at the outermost periphery of the bottom surface portion is the forward direction from the mounting portion of the inflator in a state where the inflator is attached to the mounting portion. It is equal to the amount of overhang, or 10 to 190% of the amount of overhang from the mounting portion of the inflator forward,
The ratio of the total width in the longitudinal direction of both the inclined portions in the entire width in the longitudinal direction of the bottom surface portion is 30 to 80%,
In a state where the mounting portion is horizontally disposed, the inclination of the peripheral wall portion in the expanding direction with respect to the vertical direction is 1 to 15 °. 3. A hook plate for connecting a bracket for installing the retainer to a vehicle body member and a lid for covering an airbag housed in the retainer on the outer surface of the retainer. And are attached,
The bracket includes a bracket base piece portion extending perpendicularly to the outer surface of the attachment portion from the outer surface of the retainer toward the rear, and a bracket attachment piece to the retainer extending from a front end of the bracket base piece portion. And
The bracket mounting piece includes a first bracket mounting piece extending along the outer surface of the inclined portion, and a second bracket mounting piece extending along the outer surface of the peripheral wall portion, 1 bracket mounting piece and second bracket mounting piece are fixed to the outer surface of the inclined portion and the outer surface of the peripheral wall portion by fixing means,
The hook plate is superposed on the outer surface of the peripheral wall portion, and is fixed to the outer surface of the peripheral wall portion by fixing means, and protrudes outward of the retainer from the front end of the hook plate base piece portion. Hook part, and
The bracket and the hook plate are each produced by press-molding a metal plate. And the retainer according to any one of claims 1 to 3, an airbag housed in the retainer, Ri Na and a inflator for inflating the airbag,
A gas introduction port is provided on the rear end side of the airbag in the inflation direction, the inflator is inserted into the airbag from the gas introduction port, and a peripheral portion of the gas introduction port of the airbag is the retainer Connected to the mounting portion of the bottom portion of the
The airbag is accommodated in the retainer in a folded state,
The folded body of the airbag extends in the longitudinal direction of the bottom surface portion of the retainer, and the side portions on both ends in the longitudinal direction of the folded body are respectively the inclined portions of the bottom surface portion. The airbag apparatus is arranged so as to overlap the front side of the airbag.

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