JP2016060351A - Front passenger seat airbag apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a front passenger seat airbag apparatus capable of achieving reductions in weight and the number of components.SOLUTION: A front passenger seat airbag apparatus comprises: an airbag 10 which is mounted in a region of an instrument panel in front of a front passenger seat and which is inflated by causing gas for inflation to flow into the airbag; an airbag cover 60 which covers the folded airbag and which has a door section pressed open by the airbag when the airbag is inflated; and an attachment base 40 which holds the airbag and the airbag cover and which is provided with an inflator 30 supplying the gas for inflation to the airbag. The airbag comprises a bag main body section 11; and a locked section 20 that is disposed in a circumferential edge 14 of an inflow opening 13, in the bag main body section, for causing the gas for inflation to flow in the airbag, that can prevent the circumferential edge of the inflow opening from being spaced apart from a region of the attachment base, and that is locked to a locking part 48 provided in the attachment base.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an airbag device for a passenger seat mounted on a portion of an instrument panel in front of the passenger seat.

  In a conventional passenger airbag device, an airbag that inflates by inflating an inflating gas, an attachment base that holds an inflator that supplies the inflating gas to the airbag, a folded airbag is covered, and And an airbag cover having a door portion that is pushed open by the airbag when inflated (see, for example, Patent Document 1). In this airbag apparatus, when the airbag is coupled to the mounting base, an annular (substantially square annular) bag ring (ring retainer) that holds the periphery of the inflating gas inflow opening in the airbag is used. The four bolts extending from the four corners of the bag ring are passed through the peripheral edge of the inflow opening of the airbag, further passed through the mounting base, and a nut is fastened to each bolt, thereby attaching the airbag to the mounting base. It was attached and fixed to.

  Note that the bolt extending from the bag ring also penetrates the flange of the inflator, and the inflator was also fixed to the mounting base by joint tightening using a nut.

JP 2014-43187 A

  However, in the conventional airbag device for the passenger seat, the bag ring is made of metal and is configured as a substantially quadrangular ring that continues around the entire periphery of the inflow opening of the airbag. In addition, the number of parts has been increased.

  The present invention solves the above-described problems, and an object of the present invention is to provide a passenger seat airbag device capable of reducing weight and the number of parts.

An airbag device for a passenger seat according to the present invention is mounted on a part of an instrument panel in front of the passenger seat, covers an airbag that inflates by inflating an inflating gas, and covers the folded airbag, and An airbag cover having a door portion that is pushed open to the airbag at the time of inflation, an attachment base provided with an inflator that holds the airbag and the airbag cover and supplies inflation gas to the airbag; An airbag device for a passenger seat, comprising:
The airbag cover includes a side wall portion extending from the periphery of the door portion to the mounting base side,
The mounting base and the side wall portion include a base side connecting portion on the mounting base side and a wall side connecting portion on the side wall portion side so that they can be connected to each other,
The airbag is
A bag body that expands by inflating an inflation gas;
The bag main body portion is disposed at the periphery of the inflow opening through which the inflation gas flows in, and can be prevented from being separated from the mounting base portion provided with the inflator at the periphery of the inflow opening. A locked portion to be locked to the provided locking portion; and
It is characterized by comprising.

  In the passenger airbag device according to the present invention, the locked portion provided at the periphery of the inflow opening of the bag main body portion without using the metal annular bag retainer that has been conventionally used, The airbag is fixed to the mounting base, and the airbag is attached to the mounting base. That is, simply by locking the locked portion of the airbag to the corresponding locking portion of the mounting base, the airbag can be attached to the mounting base, and the locked portion is not made of metal, For example, it can be made of a lightweight non-metallic material such as a cloth material or a synthetic resin having the same flexibility as the bag body, and can contribute to weight reduction. Moreover, since it can comprise without using the conventional bag retainer, a number of parts can also be reduced.

  Furthermore, the side wall part extended from the door part periphery of an airbag cover is connected to the attachment base by the connection of a corresponding connection part (connection of a base side connection part and a wall side connection part), In addition, the airbag is held by the mounting base so that the periphery of the inflow opening is not separated from the portion of the mounting base provided with the inflator by locking the locked portion to the locking portion. The inflating gas smoothly flows into the airbag from the inflow opening without leaking, so that the bag body portion of the airbag can be inflated. When the bag body portion is inflated, the airbag cover in which the side wall portion on the periphery of the door portion is connected to the mounting base is stably pushed by the bag body portion to open the door portion. The main body can smoothly expand and expand from the opening of the door to the passenger seat side.

  Therefore, in the passenger seat airbag device according to the present invention, weight reduction and the number of parts can be reduced, and the airbag can be deployed and inflated smoothly during operation.

In the passenger seat airbag device according to the present invention, the engaging portion of the mounting base projects on the outer peripheral surface side of the bag main body portion along a substantially radial direction centering on the inflow opening. A plurality of stop projection pieces are arranged and configured.
The locked portion of the airbag is disposed on the outer peripheral surface side of the peripheral edge of the inflow opening of the bag main body portion, and each locking protrusion piece portion is disposed between the bag main body portion, It is desirable to be configured as a band-like locked portion in which both ends are coupled to the outer peripheral surface side of the bag body portion.

  In such a configuration, the locking protrusion of the mounting base is disposed between the bag body and the belt-like locked portion having both ends coupled to the outer peripheral surface of the bag body, and the bag body is unfolded. At the time of expansion, the bag main body portion is held on the mounting base in a state where the belt-like locked portion is locked to the locking projection piece portion. And since both ends of the belt-like locked portion are coupled to the outer peripheral surface side of the peripheral edge of the inflow opening in the bag main body portion, the peripheral edge of the inflow opening of the bag main body portion is expanded when the airbag is deployed and inflated. It is prevented from floating from the mounting base, and the bag main body can be expanded and inflated by smoothly flowing the inflation gas from the inflow opening. Furthermore, since the locking protrusions of the mounting base are provided in a plurality of directions so as to protrude substantially along the radial direction centering on the inflow opening of the airbag, the inflating bag body is inflated in a well-balanced manner. As described above, it is possible to hold each bag-like locked portion and hold the bag body portion.

  Further, in the case of the configuration as described above, the belt-like locked portion is continuously disposed around the inflow opening corresponding to the plurality of locking protrusions, The belt-like locked portion may be arranged in a ring.

  In such a configuration, since the coupling site to the bag body portion at both ends of each belt-like locked portion can be shared, it is possible to easily perform the work of joining each belt-like locked portion to the bag body portion, And since the number of latching points increases, the airbag can be stably attached to the attachment base.

  Furthermore, it is desirable that the locked portion is formed of a cloth material. In such a configuration, it can be easily coupled to the bag main body portion by stitching, heat welding, adhesion, or a combination thereof. Of course, if the locked portion is formed of a cloth material, the weight of the airbag device can be easily reduced.

It is a schematic longitudinal cross-sectional view which shows the vehicle mounting state of the airbag apparatus for passenger seats of 1st Embodiment which concerns on this invention. It is an expansion schematic longitudinal cross-sectional view along the front-back direction of the airbag apparatus for front passenger seats of 1st Embodiment. It is a schematic longitudinal cross-sectional view along the left-right direction of the airbag apparatus for front passenger seats of 1st Embodiment. It is the schematic perspective view which looked at the airbag apparatus for passenger seats of 1st Embodiment from the downward direction. It is a bottom view of the state in which the airbag of a 1st embodiment was folded up. It is a schematic perspective view of the state which inflated the air bag of a 1st embodiment alone. It is the schematic perspective view which looked at the airbag apparatus for passenger seats of 2nd Embodiment from the downward direction. It is a bottom view of the folded state in the airbag of 2nd Embodiment. It is a schematic longitudinal cross-sectional view which shows the modification of the airbag of 1st Embodiment, and shows the modification of the latching state to an attachment base. It is a schematic sectional drawing which shows the modification of the attachment base of 1st Embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. A passenger seat airbag device (hereinafter abbreviated as an airbag device as appropriate) M1 of the first embodiment is a top as shown in FIGS. As the mount type, the upper surface 6 side of the instrument panel (hereinafter abbreviated as instrument panel as appropriate) 5 in front of the passenger seat is used as the mounting portion. A substantially rectangular opening 7 is formed in the mounting portion.

  The airbag device M1 includes an airbag 10 that is inflated by inflating an inflating gas G, and an airbag that covers the folded airbag 10 and has a door portion 62 that is pushed open by the airbag 10 when inflated. The cover 60 and the mounting base 40 provided with the inflator 30 that holds the airbag 10 and the airbag cover 60 and supplies the inflation gas G to the airbag 10 are configured.

  In the embodiment, the airbag cover 60 is made of a synthetic resin such as a polyolefin-based thermoplastic resin. The airbag cover 60 includes a substantially rectangular plate-like ceiling wall portion 61 provided with door portions 62 (62F, 62B) that are pushed by the inflating airbag 10 and opened back and forth, and from around the door portion 62. And a rectangular tubular side wall portion 67 extending downward. The door parts 62F and 62B are configured by disposing a thinly-scheduled breakable part 64 around the door part 62, and when the breakable part 64 is broken by being pushed by the airbag 10, the hinge part 63 disposed at the front and rear edges. The center of rotation is arranged so as to open on both the front and rear sides. The planned fracture portion 64 is disposed in a substantially H shape so as to surround the peripheral edges of the door portions 62F and 62B excluding the hinge portion 63 as viewed from above.

  On the lower surface side of the outer peripheral edge of the ceiling wall portion 61, a plurality of locking legs 65 that protrude from the periphery of the peripheral edge of the opening 7 of the instrument panel 5 to the stepped portion 8 are provided projecting downward.

  On the lower end surface of the side wall portion 67, a locking collar portion 68 is disposed as a wall side connection portion that is connected to base side connection portions 45 and 46 described later of the mounting base 40. The locking collar portion 68 is inserted into the connection holes 45a and 46a of the base side connection portions 45 and 46, locks the peripheral edges of the connection holes 45a and 46a, and moves the side wall portion 67 back and forth, left and right or upwards. The movement is restricted and the movement is connected to the mounting base 40.

  The inflator 30 is configured to include a substantially cylindrical main body 31 and a flange portion 32 that protrudes in an annular shape on the outer peripheral surface of the main body 31, and an inflation gas G is discharged to the upper portion of the main body 31. A plurality of gas discharge ports 31a are disposed. Mounting holes 22a are passed through the flange portion 32 at four corners.

  The mounting base 40 has a substantially flat plate shape made of sheet metal, and a substantially rectangular main body portion 41 is arranged at the center, and substantially rectangular plate-like base side connecting portions 45 and 45 are provided on both front and rear sides of the main body portion 41. On the left and right sides of the main body 41, substantially rectangular plate-like base side connecting portions 46, 46 are projected. Each of the base side connecting portions 45 and 46 protrudes from the main body portion 31 in a substantially planar manner in the front, rear, left and right directions. The base-side connecting portions 45 and 46 are formed with connecting holes 45a and 46a that are opened in a substantially rectangular shape for inserting the locking collar portion 68 of the airbag cover 60 and connecting the side wall portion 67, respectively. Has been. Guide wall portions 45b and 46b project downward from the periphery of the connection holes 45a and 46a so as to stabilize the locking state of the periphery of the connection holes 45a and 46a of the locking collar 68.

  A substantially rectangular plate-shaped main body portion 41 in the center of the mounting base 40 constitutes an inflator disposition site for mounting the inflator 30, and a circular shape into which the main body portion 31 of the inflator 30 is inserted from below in the center. An opening 42 is formed, and around the opening 42 for the inflator 30, four bolts 43 projecting downward are fixed. The bolt 43 is inserted into the attachment hole 32 a of the flange portion 32 of the inflator 30, and the nut 35 is fastened to attach the inflator 30 to the main body portion 41 of the attachment base 40.

  A concave portion 47 is formed on the outer peripheral side between adjacent base side connecting portions 45 and 46 of the mounting base 40. In the case of the embodiment, the mounting base 40 is configured such that the concave portion 47 is disposed inside the corner portion 67a of the rectangular tubular side wall portion 67 of the airbag cover 60. A coupling portion 22 of a band-shaped locked portion 20 as a locked portion, which will be described later, of the airbag 10 is disposed in the concave portion 47, and a locking main body between the coupling portions 22, 22 of the band-shaped locked portion 20. The portion 21 is disposed so as to cover the lower surface of the base portion 45 c in the vicinity of the main body portion 41 of the base side connecting portion 45. That is, each base portion 45c protrudes in a substantially diametrical direction centering on an inflator opening 42 of the main body 41 (which coincides with an inflow opening 13 of the airbag 10 described later), and the belt-like locked portion 20 The locking projection piece portion 48 as a locking portion for locking the locking main body portion 21 is formed.

  As shown in FIGS. 1 and 6, the airbag 10 includes a bag body portion 11 including an outer peripheral wall 12 having a substantially quadrangular pyramid shape when inflated, and two belt-like locked portions 20. Configured. The outer peripheral wall 12 is formed from a base fabric for an airbag made of a polyamide woven fabric or a polyester woven fabric having flexibility, and is disposed on the occupant side when the inflation is completed. And a vehicle body side panel portion 12b extending in a tapered quadrangular pyramid shape from the side panel portion 12a to the front side.

  An inflow opening 13 having a circular opening for allowing the inflation gas G to flow in is formed on the lower surface side near the front end of the vehicle body side panel portion 12b. In the embodiment, the inflow opening 13 is configured such that the columnar main body 31 of the inflator 30 is inserted through the opening 42 of the mounting base 40. A reinforcing cloth 12c for improving heat resistance is disposed around the inflow opening 13 in the bag body 11, and a vent hole 12d is opened on the side of the bag body 11.

  The peripheral edge of the inflow opening 13 on the outer peripheral surface 11a side of the bag main body 11 becomes the attachment site 14 to the attachment base 40, and the band-like locked portion 20 as the locking portion is disposed. Similar to the bag body 11, the belt-like locked portion 20 is formed from a base fabric for airbag made of a polyamide woven fabric or a polyester woven fabric having flexibility. In the case of the embodiment, in the left-right direction at the front and rear sides of the periphery of the inflow opening 13 on the outer peripheral surface 11a side of the bag main body 11 so as to correspond to the locking protrusions 48, 48 of the mounting base 40. A belt-like locked portion 20 is disposed along the line. Each of the belt-like locked portions 20 is obtained by stitching and joining the coupling portions 22 and 22 at both left and right ends to the attachment portion 14 of the bag main body portion 11 so as to connect the locking main body portion 21 and the bag between the coupling portions 22 and 22. Between the main body part 11, it is arranged as an insertion opening 15 into which the locking projection piece part 48 can be inserted. Therefore, when the airbag 10 is inflated by inflating the inflation gas G from the inflator 30 inserted into the inflow opening 13, the bottom surface of the locking protrusions 48, 48 is attached to the attachment portion 14 of the bag body 11. The bag body 11 is provided with the attachment portion 14 on the periphery of the inflow opening 13 by the belt-like locked portion 20 that is locked to the locking projection piece 48 by disposing the locking main body portions 21 and 21 on the side. Without being lifted from the main body 41 of the mounting base 40, it can be expanded and inflated.

  The airbag apparatus M1 of the embodiment is attached to the bracket 2 extending from the instrument panel inhose 1 using the attachment bracket 80. The mounting bracket 80 is made of sheet metal and includes a fixing piece portion 81 fixed to the bracket 2 with bolts 3 and two support flange portions 82 extending upward from both left and right edges of the fixing piece portion 81, and from the front-rear direction. It looks U-shaped. A nut 81 a that fastens the bolt 3 is fixed to the fixing piece portion 81, and the upper end of each support collar 82 extends in a belt shape in the front-rear direction and contacts the left and right lower surface sides of the flange portion 32 of the inflator 30. Thus, a support seat 82a is formed that clamps the flange portion 32 of the inflator 30 with the main body portion 41 of the mounting base 40. In each support seat 82a, a through hole 82b through which a bolt 43 extending downward from the main body 41 is inserted is provided in the front-rear direction.

  The assembly of the airbag apparatus M1 of the first embodiment is performed by folding the airbag 10 and then wrapping the folded airbag 10 with a wrapping material (not shown) for preventing collapse, except for the vicinity of the attachment portion 14. Then, the locking protrusions of the mounting base 40 are inserted into the insertion openings 15 and 15 between the locking main body 21 of the band-shaped locked portions 20 and 20 of the mounting portion 14 and the outer peripheral surface 11a of the bag main body 11. The airbag 10 is attached to the attachment base 40 by inserting 48 and 48.

  Thereafter, the main body 31 of the inflator 30 is inserted from below the opening 42 of the main body 41 of the mounting base 40, and the bolts 43 are passed through the mounting holes 32 a of the flange 32. Further, the bolts 43 are passed through the through holes 82 b of the respective support seats 82 a of the mounting bracket 80, the nuts 35 are fastened to the respective bolts 43, and the inflator 30 and the mounting bracket 80 are attached to the mounting base 40.

  Then, the locking hooks 68 of the airbag cover 60 are inserted into the corresponding connecting holes 45a and 46a and locked to the peripheral edges thereof, so that the side wall 66 is connected to the base side connecting parts 45 and 46. The airbag device M1 can be assembled.

  Thereafter, the airbag device M1 is inserted from above the opening 7 of the instrument panel 5 already mounted on the vehicle, and the locking leg 65 is locked to the step portion 8, and the operation (not shown) extending from the airbag operating circuit of the vehicle. The lead wire is connected to the inflator 30, the fixed piece 81 of the mounting bracket 80 is applied to the bracket 2 extending from the instrument panel in-hose 1, the bolt 3 is fastened to the nut 81 a of the fixed piece 81, and the fixed piece 81 Is fixed to the bracket 2, the passenger seat airbag device M1 can be mounted on the vehicle.

  If the inflation gas G is discharged from the gas discharge port 31a of the inflator 30 after the airbag device M1 is mounted on the vehicle, the bag body 11 of the airbag 10 expands, and the breakable portion 64 is broken. The door portions 62F and 62B are pushed open to the front and rear sides, and the door portions 62F and 62B are opened and inflated rearward to complete the expansion so as to receive the occupant.

  In the passenger seat air bag apparatus M1 of the first embodiment, the engagement is provided at the periphery of the inflow opening 13 of the bag body 11 without using the metal annular bag retainer that has been conventionally used. The stoppers 20, 20 are locked to locking protrusions 48, 48 as locking portions of the mounting base 40, and the airbag 10 is mounted to the mounting base 40. That is, the airbag 10 can be attached to the mounting base 40 simply by locking the locked portion 20 of the airbag 10 to the corresponding locking protrusion 48 of the mounting base 40. 20 can be made of a lightweight non-metallic material such as a cloth material or a synthetic resin having flexibility similar to that of the bag body 11 without being made of metal, and can contribute to weight reduction. Moreover, since it can comprise without using the conventional bag retainer, a number of parts can also be reduced.

  Further, the attachment base 40 has side wall portions 66 extending from the periphery of the door portion 62 of the airbag cover 60, and the corresponding connecting portions are mutually connected (the base side connecting portions 45, 46 and the locking collar portion as the wall side connecting portion). 68, and the airbag 10 is attached to the periphery of the inflow opening 13 by providing the inflator 30 by locking the locked portion 20 to the locking portion 48. It is held by the mounting base 40 so as not to be separated from the portion (main body portion) 41 of the base 40, and the inflation gas G from the inflator 30 can smoothly and smoothly enter the airbag 10 from the inflow opening 13 without leaking. The bag body 11 of the airbag 10 can be inflated. When the bag main body 11 is inflated, the airbag cover 60 in which the peripheral side wall 66 of the door 62 is connected to the mounting base 40 is stably pushed by the bag main body 11 to open the door 62. Therefore, the bag body 11 of the airbag 10 can be smoothly inflated from the opening of the door 62 to the passenger seat side.

  Therefore, in the passenger seat airbag device M1 of the first embodiment, weight reduction and the number of parts can be reduced, and the airbag 10 can be smoothly inflated and inflated during operation.

  In the passenger seat airbag device M1 of the first embodiment, the locking portion of the mounting base 40 substantially coincides with the opening 42 of the main body portion 41 of the mounting base 40 on the outer peripheral surface 11a side of the bag main body portion 11. A plurality (two in the embodiment) of locking protrusions 48 and 48 projecting along a substantially radial front-rear direction centering on the inflow opening 13 are configured. Further, the locked portion of the airbag 10 is on the outer peripheral surface 11 a side of the peripheral edge 14 of the inflow opening 13 of the bag main body 11, and the respective locking protrusions 48, 48 are connected to the bag main body 11. Arranged in the insertion opening 15 are configured as band-like locked portions 20, 20 each having both ends 22 coupled to the outer peripheral surface 11 a side of the bag body 11.

  Therefore, in the embodiment, the locking protrusion piece 48 of the mounting base 40 is inserted between the bag main body 11 and the band-shaped locked portion 20 in which both ends 22 are coupled to the outer peripheral surface 11a side of the bag main body 11. The bag main body portion 11 is held by the mounting base 40 in a state where the belt-like locked portion 20 is locked to the locking protrusion piece 48 when the bag main body portion 11 is deployed and inflated. Become. And since the coupling | bond part 22 of the both ends of the strip | belt-shaped latching | locking part 20 is couple | bonded with the outer peripheral surface 11a side of the periphery (attachment site | part) 14 of the inflow opening 13 in the bag main-body part 11, deployment of the airbag 10 is carried out. When inflated, the peripheral edge 14 of the inflow opening 13 of the bag main body 11 is prevented from being lifted from the mounting base 40, and the bag main body 11 is expanded by smoothly flowing the inflating gas G from the inflow opening 13. Can inflate. And the latching protrusion part 48 of the attachment base 40 is protrudingly provided by the front and back both sides along the substantially radial direction centering | focusing on the inflow opening 13 of the airbag 10, and two (in this embodiment, two) arrangement | positioning is carried out. Therefore, the band-shaped locked portions 20 can be locked and the bag main body portion 11 can be held so that the expanding bag main body portion 11 is inflated with good balance.

  Furthermore, in the first embodiment, the locked portion (strip-shaped locked portion) 20 is formed of a cloth material that is a base fabric for an airbag, like the bag body portion 11. Therefore, the band-like locked portion 20 can easily join the joining portions 22 at both ends to the bag body portion 11 by sewing, heat welding, adhesion, or a combination thereof. Of course, if the belt-like locked portion 20 is formed of a cloth material, the weight of the airbag device M1 can be easily reduced.

  In addition, as the belt-like locked portion 20, if it is lighter than a metal annular bag retainer and can be easily coupled to the bag main body 11, a flexible thread, string, wire, etc. Alternatively, it may be formed from a synthetic resin, a rubber plate, or a light alloy material.

  Moreover, in 1st Embodiment, the attachment bracket attached to the attachment base 40 by fastening together with the inflator 30 to the volt | bolt 43 which attaches the inflator 30 of the attachment base 40 so that the airbag apparatus M1 may be attached to the instrument panel inhose 1 of a vehicle. Although the configuration using 80 is illustrated, the airbag device M1 may be separately attached to a predetermined bracket extending from the instrument panel in-hose 1 using a predetermined bracket fixed in advance to the mounting base 40. Good.

  Furthermore, in the case of a configuration in which the belt-like locked portion is provided and the airbag is attached to the attachment base, it may be configured as an airbag device M2 of the second embodiment shown in FIGS.

  In the airbag device M2, the belt-like locked portion 20A is continuously arranged in a square ring shape. That is, the four corners of the quadrangular annular sheet material S are stitched to the attachment portion 14 at the peripheral edge of the inflow opening 13 of the bag body 11 as the coupling portion 22. The sheet material S is formed from the same airbag base fabric as that of the bag body 11. The attachment base 40 of the second embodiment is the same as that of the first embodiment, and the coupling portion 22 is sewn to the attachment portion 14 of the bag body 11 at the position of the recess 47 between the adjacent base side connecting portions 45, 46. Has been.

  Therefore, in the second embodiment, the four belt-like locked portions 20A are locked with the base portions 45c, 46c on the main body 41 side of the base side connecting portions 45, 46 as locking protrusions 48A. It becomes a state.

  In the airbag device M2 of the second embodiment, the same operation and effect as in the first embodiment can be obtained, and a plurality of belt-like locked portions 20A extend radially in the front-rear and left-right directions around the inflow opening 13 ( Corresponding to the four locking protrusions 48A in the illustrated example, the belt-like locked portions 20A are continuously arranged at the mounting portion 14 around the inflow opening 13 so that each of the belt-like locked portions 20A has a square annular shape. It will be arranged continuously.

  Therefore, in 2nd Embodiment, since the coupling | bond part 22 to the bag main-body part 11 of the both ends of each strip | belt-shaped latching | locking part 20A can be shared, the joint operation | work to the bag main-body part 11 of each strip | belt-shaped latching | locking part 20A is carried out. Since it can be performed easily and the number of locking points increases, the airbag 10 can be stably attached to the mounting base 40.

  When a plurality of locking protrusions 48, 48A are provided, the belt-like locked portions 20, 20A are engaged with the locking protrusions 48, 48A so that the bag body 11 can be smoothly expanded and expanded. If stopped, in addition to projecting in the front, rear, left and right so as to face each other in the diametrical direction with the inflow opening 13 as the center, three or five locking projecting pieces 48, 48A are equally distributed along the radial direction. It may be arranged as an odd number such as. Of course, the belt-like locked portions 20 and 20 </ b> A are also arranged at the attachment portion 14 of the outer peripheral surface 11 a of the bag main body portion 11.

  In the first and second embodiments, the locked portions 20 and 20A are directly locked to the locking portion 48 extending from the main body 41 of the mounting base 40 so as to prevent the locking. Indicated. However, for example, as shown in FIG. 9, the locked portion 25 provided with the insertion hole 26 for inserting the locking hook portion 68 as the wall side connecting portion of the airbag cover 60 is fixed to the bag body portion by sewing or the like. 11 to the locking portion 49 formed of the base side connecting portion 45 indirectly using the locking of the mounting base 40 to the periphery of the connecting hole 45a of the mounting base 40 in the locking collar portion 68. On the other hand, it is good also as a structure which locks the to-be-latched part 25. FIG.

  Furthermore, in the first and second embodiments, the base-side connecting portion 45 provided with connecting holes 45a and 46a on the mounting base 40 side so that the mounting base 40 and the side wall portion 66 of the airbag cover 60 can be connected to each other. The case where 46 and the latching hook part 68 as a wall side connection part by the side wall part 66 side were provided was shown. However, as shown in FIG. 10, the attachment base 40 and the side wall portion 66 of the airbag cover 60 are connected to each other by providing a locking hole 70 as a wall side connecting portion on the side wall portion 67 side. Further, a configuration may be adopted in which the locking collar portion 51 as the base side connecting portion extending from the mounting base 40B is locked.

  Furthermore, in the first and second embodiments, when the inflator 30 is provided on the attachment base 40, the inflator 30 is attached to the attachment base 40 using the bolts 43 and the nuts 35. On the other hand, it may be coupled using welding, rivets or the like. Furthermore, as shown in FIG. 10, the main body portion 41 of the mounting base 40B may be composed of a flange portion 32 of the inflator 30B. In other words, the main body 41 of the mounting base 40B may be configured to be coupled to the main body 31B of the inflator 30B, and the inflator 30B may be provided on the mounting base 40B.

DESCRIPTION OF SYMBOLS 5 ... (Instrument panel) Instrument panel, 10 ... Air bag, 11 ... Bag main-body part, 11a ... Outer peripheral surface, 13 ... Inflow opening, 14 ... (periphery of opening) attachment site | part,
20, 20A ... (locked portion) belt-like locked portion, 25 ... locked portion, 30, 30B ... inflator, 40, 40B ... mounting base, 41 ... (inflator placement site) main body portion, 42 ... ( (For inflator) opening, 45, 46 ... base side connecting portion, 45a, 46A ... connecting hole, 48, 48A ... (locking portion) locking protrusion piece, 49 ... locking portion, 51 ... (base side connecting portion) Locking hook part, 60 ... Airbag cover, 62 (62F, 62B) ... Door part, 67 ... Side wall part, 68 ... (Wall side connecting part) Locking hook part, 70 ... (Wall side connecting part) Locking hole , G: Inflatable gas, M1, M2: Passenger seat airbag apparatus.

Claims (4)

An airbag that is mounted on the instrument panel in front of the passenger seat and that inflates by inflating gas, and a door that covers the folded airbag and is pushed open by the airbag when inflated And a mounting base provided with an inflator that holds the airbag and the airbag cover and supplies inflation gas to the airbag. Because
The airbag cover includes a side wall portion extending from the periphery of the door portion to the mounting base side,
The mounting base and the side wall portion include a base side connecting portion on the mounting base side and a wall side connecting portion on the side wall portion side so that they can be connected to each other,
The airbag is
A bag body that expands by inflating an inflation gas;
The bag main body portion is disposed at the periphery of the inflow opening through which the inflation gas flows in, and can be prevented from being separated from the mounting base portion provided with the inflator at the periphery of the inflow opening. A locked portion to be locked to the provided locking portion; and
An airbag device for a passenger seat, comprising: A plurality of engaging base engaging portions are arranged on the outer peripheral surface side of the bag main body portion as engaging protrusion pieces that protrude along a substantially radial direction centered on the inflow opening,
The locked portion of the airbag is disposed on the outer peripheral surface side of the peripheral edge of the inflow opening of the bag main body portion, and each locking protrusion piece portion is disposed between the bag main body portion, The airbag device for a passenger seat according to claim 1, wherein the airbag device is configured as a band-like locked portion in which both ends are coupled to the outer peripheral surface side of the bag main body portion.   The band-like locked portions are continuously arranged around the inflow opening corresponding to the plurality of locking protrusion pieces, and each of the band-like locked portions is connected in an annular shape. The airbag device for a passenger seat according to claim 2, wherein the airbag device is disposed.   The passenger seat airbag apparatus according to any one of claims 1 to 3, wherein the locked portion is formed of a cloth material.

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