JP2009083531A - Cover body of airbag and airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To cause an airbag provided at a door part to be spread out along a side surface part of a car interior. <P>SOLUTION: The airbag 31 is expanded upward from the door part 1 toward the side of an occupant. A cover body 22 for covering the airbag 33 has a hinge part 86 provided toward the inner side of the car interior of a door part 73, and a support piece part 87 protruding from the outer side of the car interior. A rupture expected part 99 is formed at the support piece part 87. A guide projection part 91 is smoothly formed on the lower surface of the door part 73. The height positions of the rupture expected part 99 and the guide projection part 91 are aligned with the position of an edge piece part 66 protruding on the lower side from the outer side of the car interior of the door part 73. When the airbag 31 is expanded, the door part 73 rotates toward the inner side of the car interior, and the airbag 31 abuts on the guide projection part 91. The airbag 31 spreads out along a window part 15 without interfering with the edge piece part 66. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to, for example, an airbag cover body that is provided at a door portion of an automobile and inflates and deploys to the side of a seat, and an airbag apparatus including the airbag.

  2. Description of the Related Art Conventionally, an airbag device that inflates and deploys an airbag to the side of a seat of an automobile and protects an occupant at a side collision is known. Further, with respect to such an airbag device, the airbag is folded and stored in a side door portion of the passenger compartment, and the airbag is inflated and deployed upward from the door portion to protect the occupant's head and the like. A configuration called a mount airbag is known (for example, see Patent Document 1). In the configuration of Patent Document 1, a door portion that covers a folded airbag is provided on the upper portion of the door portion that is located below the window portion, and the door portion extends along the side of the vehicle interior as viewed from the passenger. It is divided by the tear line arranged. When the airbag is deployed, the tear line is broken due to the deployment pressure of the airbag, the door is rotated toward the outside of the passenger compartment, that is, toward the window glass, and the airbag is moved upward or laterally of the passenger compartment. To expand to.

Regarding such an airbag device, a configuration in which the airbag is deployed along the outer side of the passenger compartment and the tear line of the door portion is arranged along the outer side of the passenger compartment is conceivable. In this configuration, when the tear line arranged at a position along the outside of the passenger compartment of the door panel is broken due to the pressure of deployment of the airbag, the door portion rotates to the side of the passenger compartment, so that the airbag is upward, that is, the window It expands between the glass of the part and the door part.
Registered Utility Model No. 3111126 (5th page, FIG. 1, FIG. 3)

  As described above, the airbag device that deploys the airbag upward from the door portion and further deploys along the outer side of the passenger compartment has a configuration in which the airbag portion can be smoothly deployed by smoothly rotating the door portion. Desired. Moreover, since an airbag is expand | deployed in the narrow space between a window glass and a door part, it is calculated | required to suppress interference with an airbag and a door part.

  The present invention has been made in view of such a point, and an airbag cover body and an airbag apparatus capable of smoothly deploying an airbag disposed on a side portion of a vehicle compartment upward along a side surface portion of the vehicle compartment. The purpose is to provide.

  The airbag cover body according to claim 1 is an airbag apparatus including an airbag that is folded and stored in a side portion of a passenger compartment and in which gas is introduced and inflated and deployed upward along a side portion of the passenger compartment. A cover body of an airbag to be used, which is a main body part that covers a side of the airbag stored in a folded manner toward the vehicle interior side, a door part that covers an upper side of the airbag, and the main body part and the door part are bent. A hinge portion that can be connected, and a guide projection that protrudes downward from the lower surface of the door portion and abuts against an inflating and deploying airbag and guides the airbag to the outside of the passenger compartment. is there.

  In this configuration, when gas is supplied to the airbag covered by the cover body, the airbag is inflated and deployed, and the door is pressed from below, and the hinge is pivoted toward the vehicle interior side as a fulcrum. The airbag is inflated and deployed upward along the side surface of the vehicle compartment. Since the guide protrusion protrudes downward from the lower surface of the door portion, when the airbag is inflated and deployed, the airbag abuts on the guide protrusion and interference with other portions of the door portion is suppressed. Then, it comes into contact with the guide projection of the door portion that expands toward the side of the passenger compartment and is guided to the outer side of the passenger compartment, and smoothly inflates and expands upward along the side surface of the passenger compartment.

  According to a second aspect of the present invention, there is provided the airbag cover body according to the first aspect, wherein the airbag cover body includes an edge piece projecting downward from the outer edge of the door of the vehicle compartment. The height position of the lower end portion of the protrusion is set in accordance with the height position of the lower end portion of the edge piece portion.

  And in this structure, since the edge piece part projected below from the edge part of the vehicle compartment outside of a door part was provided, other members of a vehicle compartment are covered with the cover body containing this edge piece part etc. The appearance of the passenger compartment is improved. And since the height position of the lower end part of the guide protrusion is set according to the height position of the lower end part of the edge piece part, the airbag that inflates and deploys does not interfere with the edge piece part, It smoothly expands and expands upward along.

  The airbag cover body according to claim 3 is the airbag cover body according to claim 1 or 2, wherein the airbag cover body is located on the side of the vehicle interior of the edge piece and projects downward from the lower surface of the door. A support piece portion, an attachment fixing portion provided on the support piece portion and supported by a member of a side surface portion of the passenger compartment, and provided on the support piece portion above the attachment portion to inflate the airbag. It breaks with the pressure which expand | deploys, and the upper part after fracture | rupture comprises the fracture | rupture planned part which comprises a guide protrusion.

  And in this configuration, by attaching or supporting the mounting and fixing portion provided on the support piece projecting downward from the lower surface of the door portion directly or indirectly to the member on the side surface portion of the passenger compartment, The cover body is stably supported, and the appearance of the airbag device is improved. In the state where the planned breakage portion is broken, the upper portion connected to the door portion after being broken constitutes a guide projection, and the airbag is inflated and deployed smoothly with a simple configuration.

  An airbag device according to a fourth aspect of the present invention includes an airbag that is folded and housed in a door portion on a side portion of a passenger compartment, gas is introduced, and expands upward along a side surface portion of the passenger compartment, and a gas is supplied to the airbag. And an inflator for supplying the cover and a cover body according to any one of claims 1 to 3, wherein the main body portion constitutes an interior material of the door portion.

  In this configuration, since the cover body according to any one of claims 1 to 3 is provided, by supplying gas to the airbag covered with the cover body, the airbag is moved upward along the side surface portion of the vehicle compartment. Smoothly inflates and deploys.

  According to the present invention, the airbag disposed on the side portion of the passenger compartment is guided outwardly of the passenger compartment by the guide protrusion of the door portion of the cover body, and smoothly inflated and deployed upward along the side portion of the passenger compartment. it can.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of an airbag cover body and an airbag apparatus according to the invention will be described with reference to the drawings.

  In FIGS. 1 and 2, reference numeral 1 denotes a door portion constituting a vehicle body of the automobile, and the door portion 1 is located on the side of a seat provided in the passenger compartment 2. Note that, hereinafter, with reference to the straight traveling direction of the vehicle, the vehicle interior side (the arrow C shown in FIG. 1), which is upward (in the direction of the arrow U shown in FIG. 1) and from the door 1 side toward the center of the vehicle compartment 2. Direction), the direction from the center side of the passenger compartment 2 toward the door portion 1 side, such as the outer side of the passenger compartment (the direction of arrow D shown in FIG. 1) and the front side (the direction of arrow F shown in FIG. 2). .

  And this door part 1 is equipped with the frame-shaped frame 11 surrounding the whole door part 1, the lower part of this frame 11 becomes the door main-body part 12, and the upper part of this frame 11 is a windshield, side glass or An opening is opened and closed by a window glass 14 called a side window glass to form a window portion 15 constituting a side surface portion that is a predetermined surface. The door body 12 includes an inner panel 16 that is a member to be attached formed of a metal plate and the like, and an outer panel 17 that is formed of a metal plate that is spaced apart from the inner panel 16 on the outer side of the passenger compartment. It has. The inner side of the inner panel 16 is covered with a main door trim 18 that is an interior material partly formed of resin or the like, and a part of the rear part of the upper part constitutes the airbag device 21. In addition, it is covered with a cover body 22 that is an interior material. In FIG. 1, reference numerals 24 and 25 denote seal members called weather strips that are in close contact with the top and bottom of the window glass 14. In FIG. 2, reference numeral 26 denotes a storage portion, 27 denotes a door opening / closing grip portion, and 28 denotes a speaker.

  The airbag device 21 is an occupant protection device, and is a so-called door mount airbag that mainly protects the occupant's head at the time of a side collision or rollover. In addition to the cover body 22, the airbag 31 has a bag shape. And an inflator 33 that is a gas generator for supplying gas to the airbag 31, and a cover body 22, the airbag 31, and a mounting body 34 to which the inflator 33 is attached. The module is configured. Further, a control device is connected to the airbag device via a harness (not shown).

  The airbag 31 is formed into a bag shape by sewing one or a plurality of base fabrics, for example, by sewing the outer peripheral portions of the main panel, which are two substantially identical base fabrics, into a flat bag shape It is configured. And normally, it is folded small by predetermined methods, such as roll shape and bellows shape.

  The inflator 33 includes a substantially cylindrical main body, a gas injection unit is provided on one end of the main body, a connector is provided on the other end, and a harness is connected to the connector. . And this inflator 33 reacts the propellant filled inside by opening an ignition signal from the control device via the harness, or releases the gas stored in the internal cylinder, etc. The gas is supplied to the airbag 31 directly or through a pipe.

  Further, the attachment body 34 is constituted by, for example, a metal or a combination of a plurality of members. In the present embodiment, the attachment body 34 is constituted by a combination of a plate 41 and a retainer 42 fixed to the plate. The plate 41 is a vertical flat plate-shaped metal plate body.A vehicle body mounting portion 41a is formed at the lower side, a retainer mounting portion 41b is formed at an intermediate position in the height direction, and a first plate is formed at the upper side. Two attachment receiving portions 44 are formed. Further, a protective surface portion 41c for protecting the airbag 31 is provided on the surface of the plate 41 on the side of the vehicle interior as required. The retainer 42 is formed, for example, by extruding metal, and has a horizontal bottom plate portion 45 and a vertical inner plate portion 46 extending upward from an edge of the bottom plate portion 45 on the side of the vehicle interior. And a mounting plate 47 extending downward from the outer edge of the bottom plate 45 to the lower side, and a first protruding from the vicinity of the edge of the bottom plate 45 toward the lower side of the vehicle. A cover lower locking portion 48 having a substantially L-shaped cross section constituting the attachment receiving portion is integrally formed. Further, if necessary, a first attachment receiving portion is provided on the side of the inner plate portion 46 in the vehicle interior. A cover middle locking portion 49 having an arcuate cross section is formed. The attachment plate 34 is configured by attaching the attachment plate portion 47 to the retainer attachment portion 41b of the plate 41 with a fixture 50 such as a rivet. In this state, a storage portion 52 having an upper opening is formed in a portion surrounded by the plate 41, the bottom plate portion 45, and the inner plate portion 46, and the airbag 31 and the inflator 33 folded in the storage portion 52. Is stored. The attachment body 34 is a fixture 55 such as a rivet, and the vehicle body attachment portion 41a is attached to the inner panel 16 and attached to the door portion 1.

  The cover body 22 is also called a lid or the like. As shown in FIGS. 1 to 5, the cover body 22 is made of a resin-made outer portion 61 on the front surface side that is the vehicle compartment 2 side and vibrates on the back surface side of the outer portion 61. It is configured as a laminate in which a resin inner portion 62 attached by welding or the like is laminated.

  The outer portion 61 is formed in a continuous shape with the main door trim 18 and constitutes an interior material that covers the door main body portion 12 together with the main door trim 18. That is, an upper panel 64 that covers the upper side of the door main body 12, a side panel 65 as a main body that extends continuously downward from the upper edge of the upper panel 64, and extends upward. An edge piece 66 that is continuous with the edge of the panel part 64 on the outer side of the passenger compartment and extends downwardly shorter than the side panel part 65, and these upper panel part 64, side panel part 65, and edge piece part The rear panel portion 67 is formed integrally with or separately from the rear edge portion of the 66 and covers the rear side surface. The upper panel portion 64 is formed in a planar shape or a curved surface shape according to the design of the door portion 1, but in the present embodiment, it is formed in an inclined surface shape slightly upward toward the outer side of the passenger compartment. Thus, the seal member 25 of the door portion 1 is covered so as not to be seen from the passenger compartment 2 side. The side panel portion 65 is formed in a curved shape according to the shape of the main door trim 18, and a trim connecting portion 69 that is engaged with and connected to the main door trim 18 is formed on the lower edge portion. At the same time, a side cap portion 70 that exposes other components or enables maintenance work or the like is provided in a part of the lower side in an appropriate shape. Further, the edge piece portion 66 extends substantially vertically with the tip side facing downward through an inclined intermediate plate portion formed as required according to the design requirement. And this edge piece part 66 is also called an entrainment part, and in the structure which set the height position of the upper surface panel part 64 high in order to improve an external appearance so that the sealing member 25 etc. cannot be seen from the compartment 2 side. The interior of the door portion 1 is covered so as not to be exposed, thereby improving the appearance. Further, the rear panel portion 67 is also called a lid cover, and as shown in FIGS. 4 and 5, a rear cap portion 71 through which a harness or the like is inserted is provided.

  The outer portion 61 is formed with a partition portion 72, and an outer door portion 74 constituting the door portion 73 is formed inside the partition portion 72. And the partition part 72 is a weak part which is a thin part as a door planned line part, and the upper surface panel part 64 of the outer part 61 and the lower surface side of the edge piece part 66 are recessedly provided by cutting or the like. It is formed weakly and functions as a tear line or a hinge. As shown in FIG. 2, it extends back and forth along the connection part of the upper panel 64 with the side panel 65 on the side of the vehicle interior or in the vicinity of the connection. It is formed in a substantially U-shape in a plane including a long side portion 72a and a short side portion 72b extending from the front and rear ends of the long side portion 72a to the outer side of the passenger compartment and reaching the edge of the edge piece portion 66. ing. That is, the partition 72 is partially or wholly broken by the pressure at which the airbag 31 is inflated and deployed, and usually the portion of the short side 72b is broken as an outer break, and the long side 72a that is not broken is It functions as a hinge part that is easily deformed and bent. The outside of the partition 72 is an outer shell 75 that is a non-deployment portion that does not deploy even when the airbag 31 is inflated and deployed.

  The outer portion 61 is mainly formed of a hard resin. In the present embodiment, as shown in FIG. 3, the outer portion is a surface portion formed by injection-molding polypropylene (PP), which is a hard resin. A skin layer 77, which is a foamed urethane skin (PUR) for improving the appearance and feel, is thinly and integrally decorated on the surface of the base 76.

  On the other hand, the inner portion 62 is made of a soft resin made of a softer material than the material constituting the outer portion base 76 of the outer portion 61, and in the present embodiment, the first and second backing portions 81, Each 82 is injection-molded with a TPO resin (thermoplastic olefin) which is an elastomeric resin. The first backing part 81 is located on the back side of the upper side part of the top panel part 64 and the side panel part 65 and is integrally attached to the outer part 61 by vibration welding or the like, and the second backing part 82 Is located on the back side of the lower side portion of the side panel portion 65 and is integrally attached to the outer portion 61 by vibration welding or the like. In the manufacturing process of the cover body 22, the outer base body 76 of the outer part 61 and the first and second backing parts 81 and 82 of the inner part 62 are respectively formed, and the first back surface of the outer base body 76 is formed on the first surface. Next, the outer surface of the outer base body 76 is formed by reaction injection forming on the surface of the outer base body 76, and finally the second backing part 82 is vibrated on the back surface of the outer base body 76. It has become.

  As shown in FIGS. 1, 3, 5, and 6, the first backing portion 81 is attached to the back side of the outer door portion 74 of the outer portion 61 to constitute the door portion 73. Part 84, inner outer part 85 which is attached to the back side of outer outer part 75 of outer part 61 and constitutes a non-deployment part, and the vehicle interior side of inner door part 84 and inner outer part 85 can be deformed. Are integrally formed with a hinge portion 86 that is connected to the inner door portion 84 and a support piece portion 87 that projects from the outer side of the inner door portion 84 to the lower side in the anti-deployment direction.

  The inner door portion 84 includes a plate-like inner door substrate portion 88 which is welded in close contact with the back surface of the outer door portion 74. Further, the inner projection portion 91 is directed downward from the inner door substrate portion 88. Is protruding. The guide protrusion 91 is formed by bending the inner door board 88 downwardly in a substantially U-shaped section along the front-rear direction, that is, the longitudinal direction of the inner door board 88. That is, the guide protrusion 91 has a so-called depression shape that bulges in a smooth curved shape in the direction from the vehicle interior side to the vehicle interior outer side, and the lower surface is a curved shape that smoothly contacts the airbag 31. It has become. Further, the height position of the apex, that is, the lower end portion of the guide protrusion 91 is formed in accordance with the height position of the lower end portion of the edge piece portion 66 of the outer portion 61.

  Further, as shown in FIGS. 5 and 6, the inner outer portion 85 includes a plate-shaped inner outer base portion 93 that is welded in close contact with the back surface of the outer outer portion 75, and the longitudinal direction of the inner outer base portion 93, that is, the front and rear Inner outer end plate portions 94 projecting in the shape of vertical plates from both ends in the direction are provided. The inner shell base portion 93 is formed in a plate shape that is curved along the shape of the outer shell portion 75 so as to surround three sides of the inner door portion 84. Further, as shown in FIG. An engagement receiving portion 95 that is engaged with the cover middle engagement portion 49 of the attachment body 34 is formed.

  The hinge portion 86 connects the inner side edge portion of the inner door base plate portion 88 of the inner door portion 84 to the inner casing portion 85 in a deformable manner, that is, along the front-rear direction with respect to the non-deployed portion. The door portion 73 is connected to and supported so as to be unfolded, that is, rotatable about the shaft. The hinge part 86 faces the long side part 72a of the partition part 72 of the outer part 61, and is curved and bulged in a substantially U-shaped cross section downward so as to straddle the long side part 72a. ing. Further, as shown in FIGS. 5 and 6, the hinge portion 86 is divided into a plurality of pieces by slits 86a along the inner and outer directions.

  A portion between the front and rear end portions of the inner door portion 84 and the inner shell portion 85 is a portion facing the short side portion 72b of the partition portion 72. Although this portion can be formed as a thin portion to be broken, in this embodiment, it is formed as a slit that is a cut groove.

  Further, the support piece 87 is an airbag module fixing portion that can also be called an inner vertical wall, and has a plate-like shape that is vertically downward from the vicinity of the end of the inner door base plate 88 of the inner door portion 84 on the outer side of the passenger compartment. It is not installed. A plurality of circular mounting fixing portions 96 are provided on the front end side, that is, the lower end side of the supporting piece portion 87, and the supporting piece portion 87 is fixed by a fixture 97 such as a bolt inserted into the mounting fixing portion 96. Is attached to the second attachment receiving portion 44 of the attachment body 34. Further, the support piece portion 87 is formed with a planned fracture portion 99 at an intermediate position in the height direction, that is, spaced below the inner door base plate portion 88 and spaced above the mounting fixing portion 96. Has been. The planned break portion 99 can also be called an inner break portion, has a groove shape recessed from the outside of the passenger compartment, is made more fragile than other portions of the support piece 87, and the airbag 31 is inflated and deployed. It is designed to break due to pressure. Further, the height position of the planned fracture portion 99 is formed in accordance with the height position of the lower end portion of the edge piece portion 66 of the outer portion 61.

  The second backing portion 82 is also called a lower support portion. The second backing portion 82 is a plate-like substrate portion 101 that is welded in close contact with the lower side portion of the back surface of the outer door portion 74, and the back surface side from the substrate portion 101. And a support plate portion 102 projecting outward from the passenger compartment. The support plate portion 102 is formed with a through-hole-shaped locking receiving portion 103 for locking the cover lower portion locking portion 48 of the attachment body 34.

  The control device connected to the inflator 33 of the airbag device 21 includes a CPU and one or more sensors connected thereto, and activates the inflator 33 according to the state of the occupant, the collision, the vehicle body angle, and the like. An ignition signal is sent.

  Therefore, as shown in FIG. 1, the airbag device 21 stores an inflator 33 and a folded airbag 31 in a storage portion 52 of a mounting body 34, covers these members with a cover body 22, and forms an airbag module. Composed. The cover body 22 engages the latch receiving portion 95 of the first backing portion 81 with the cover middle portion latching portion 49 of the attachment body 34 and the second portion with the cover lower portion latching portion 48 of the attachment body 34. The locking receiving portion 103 of the backing portion 82 is locked, and the mounting fixing portion 96 of the support piece 87 is attached to the second mounting receiving portion 44 of the mounting body 34 with a fixture 97 inserted from the outside of the passenger compartment. Thus, the cover 22 is normally fixed.

  Then, the inflator 33 and the control device are electrically connected, and the vehicle body attachment portion 41a of the attachment body 34 is attached to the inner panel 16 of the door portion 1 with the fixture 55, and the trim connecting portion 69 at the lower end of the cover body 22 is attached. By engaging the main door trim 18, the airbag device 21 is installed in the door portion 1.

  Next, an operation when the airbag device 21 is deployed will be described.

  When the vehicle body receives an impact such as a side collision or rolls over from the stored state of the airbag 31 shown in FIG. 1, FIG. 2 (a), and FIG. Judgment is made and the inflator 33 is activated to supply gas to the airbag 31. Then, the airbag 31 starts to inflate and deploy toward the upper side where the storage portion 52 opens, and presses the door portion 73 of the cover body 22. Then, as shown in FIG. 7 (b), due to this pressing pressure, the planned break portion 99 of the support piece portion 87 of the inner portion 62 breaks, and a part or all of the partition portion 72, at least the short side portion 72b. To break. When the airbag 31 is further inflated and deployed, the door portion 73 pressed by the airbag 31 rotates to the side of the vehicle interior with the long side portion 72a of the outer portion 61 and the hinge portion 86 of the inner portion 62 as fulcrums. Then, an air bag inflation passage for the air bag 31 is formed. In the case where the long side portion 72a of the partition portion 72 of the outer portion 61 is connected without breaking, the long side portion 72a serves as a fulcrum, and the hinge portion 86 is deformed to extend, and the door portion 73 rotates smoothly. Further, when the long side portion 72a is broken, the hinge portion 86 is deformed so as to be extended and becomes a fulcrum, and the door portion 73 is smoothly rotated. Then, the airbag 31 protruding from the protruding opening is placed on the window 15 as shown in FIG. 2 (b) through the space between the door 73 and the window 15 while rotating the door 73. It inflates and deploys along the upper side, restrains the occupant moving to the side and protects the head and the like.

  Further, when the airbag 31 is inflated and deployed upward, it smoothly abuts on the guide projection 91 projecting from the rear surface side of the door 73, and the door 73 is smoothly rotated to the side of the vehicle interior. In addition, while suppressing interference between the airbag 31 and other parts of the cover body 22, particularly the edge piece 66 projecting downward, the airbag 31 is guided to the outside of the passenger compartment, and the airbag 31 is Deploy along 15 smoothly.

  Further, since the height position of the planned fracture portion 99 is formed in alignment with the height position of the lower end portion of the edge piece 66, the upper portion 99a of the fracture planned portion 99 that has been fractured is the guide protrusion 91. Similarly, it functions as a guide protrusion, and suppresses interference between the airbag 31 and other portions of the cover body 22, particularly the edge piece 66 protruding downward.

  As described above, according to the present embodiment, a so-called door mount airbag that inflates and deploys the airbag 31 stored in the door portion 1 upward from the upper surface of the door portion 1 is formed on the cover body 22 in the vehicle interior side. Since the rotating door portion 73 is formed and the guide protrusion 91 that smoothly contacts the airbag 31 is provided on the lower surface side of the door portion 73, the door portion 73 can be smoothly rotated to the side of the vehicle interior. In addition, the interference between the airbag 31 and the other part of the cover body 22, in particular, the edge piece portion 66 that is a winding shape protruding downward is suppressed, and the airbag 31 is guided to the outside of the passenger compartment. The air bag 31 can be smoothly deployed along the window glass 14 of the window portion 15 by preventing inward travel.

  And since the guidance protrusion 91 matched the height position with the edge piece part 66, it can suppress interference with the airbag 31 and the edge piece part 66, suppressing reducing the volume of the accommodating part 52. FIG.

  Further, the cover body 22 is configured such that the side of the vehicle interior locks the locking receiving portion 95 of the first backing portion 81 to the cover middle locking portion 49 of the mounting body 34, and the cover lower locking portion of the mounting body 34. 48, the locking receiving portion 103 of the second backing portion 82 is locked and fixed, and the outer side of the passenger compartment attaches the mounting fixing portion 96 of the support piece 87 to the second mounting receiving portion of the mounting body 34. Since it is fixed to the portion 44 with the fixing tool 97, the rigidity of the cover body 22 is improved and it can be firmly attached without rattling. Therefore, the appearance can be maintained satisfactorily without deformation of the cover body 22 even when the door portion 1 is opened and closed or when a passenger applies a force to the cover body 22.

  When the airbag 31 is inflated and deployed, the support piece portion 87 breaks at the planned breakage portion 99. Since the breakage portion 99 is aligned with the edge piece portion 66 at the height position, The part 99a functions as a guide protrusion together with the guide protrusion 91, and interference between the airbag 31 and the edge piece 66 can be suppressed. That is, when the airbag 31 is inflated and deployed, the fractured portion of the planned fracture portion 99 is exposed, but this planned fracture portion 99 is formed of a softer resin than the resin constituting the edge piece 66. Therefore, the broken portion can be guided by smoothly contacting the airbag 31, and the upper portion 99a can smoothly guide the airbag 31 by filling the space between the guide projection 91 and the edge piece 66. .

  Further, the outer portion 61 and the inner portion 62 are laminated to form the cover body 22, and the support piece portion 87 of the inner portion 62 is provided with the planned break portion 99. Therefore, the seam formed on the outer portion base 76 of the outer portion 61 is provided. The number of divided parts or planned breakage is reduced to ensure a large design surface and improve the appearance, and the cover body 22 is rotated to the edge piece 66 on the outer side of the passenger compartment to bulge the airbag 31. Therefore, the air passage 31 can be inflated and deployed smoothly. When the airbag 31 is inflated and deployed, it is sufficient that at least the short side portion 72b of the planned break portion 99 provided on the support piece portion 87 of the inner portion 62 and the partition portion 72 provided on the outer portion 61 is broken. In the temperature range, the door 73 can be smoothly rotated and the airbag 31 can be inflated and deployed smoothly.

  In addition, since the edge piece portion 66 is provided away from the support piece portion 87 toward the vehicle exterior side, the edge portion of the window portion 15 constituting the side surface portion of the door portion 1 is covered with the edge piece portion 66 which is a free end, Appearance can be improved. Then, by breaking the planned break portion 99 of the support piece portion 87, the edge piece portion 66 is rotated together with the door portion 73 of the upper surface panel portion 64, so that a bulge passage for the airbag 31 is formed largely. 31 can be deployed smoothly.

  In this way, it is possible to easily achieve both the improvement of the appearance by providing the edge piece portion 66 and the smooth inflation and deployment of the airbag 31.

  In addition, the airbag device 21 includes the inflator 33 and the airbag 31 attached to the attachment body 34, and the airbag module is configured with the cover body 22 constituting a part of the door trim attached to the attachment body 34. The modularization of the airbag device 21 can improve workability such as storage, transport, and assembly work to the vehicle body.

  In the above-described embodiment, the guide protrusion 91 provided on the first backing portion 81 of the inner portion 62 of the cover body 22 is formed in a curved plate shape that is continuous in the longitudinal direction. As shown in FIG. 8, a plurality of guide protrusions 111 that are curved and bulged with the direction from the vehicle interior side to the vehicle interior outer side as the longitudinal direction are formed as shown in FIG. In this manner, a plurality of guide protrusions 112 that are curved and bulged with the front-rear direction as the longitudinal direction can be formed.

  Further, in place of the configuration in which the lower surface toward the airbag 31 is curved, a plurality of vertical plate-like ribs having a longitudinal direction in the direction from the vehicle interior side to the vehicle exterior side as shown in FIG. It is also possible to form the guide protrusion 114.

  Further, depending on the shape of the guide protrusion 91 and the like, the planned break portion 99 of the support piece 87 can be formed at a position higher than the height position of the edge piece 66, for example, at the upper end of the support piece 87.

  Furthermore, only the upper portion 99a of the planned fracture portion 99 of the support piece portion 87 may be a guide projection, and the guide projection 91 that bulges downward may not be provided.

  Further, the shape of the planned break portion 99 of the support piece portion 87 and the upper portion 99a formed after the breakage may be a shape that forms an inclined surface or a curved surface that smoothly contacts the airbag 31.

  Moreover, although the cover body 22 was demonstrated as covering a part of the door part 1, it is not restricted to this structure, It can also form as a door trim which covers the whole door part 1 integrally.

  Furthermore, the cover body 22 is not limited to the structure in which the outer part 61 and the inner part 62 formed separately are joined, and the outer part 61 and the inner part 62 can be integrally formed.

  Further, the shape and configuration of the inflator and the airbag are not limited to those described above, and various configurations can be used.

  The present invention can be applied to, for example, an airbag device provided in a door portion of an automobile.

It is explanatory drawing of the state attached to the door part which shows one Embodiment of the airbag apparatus of this invention. It is explanatory drawing of the state attached to the door part of the airbag apparatus same as the above, (a) is before deployment, (b) is at the time of deployment. It is II sectional drawing of FIG. 5 of the cover body of an airbag apparatus same as the above. It is the perspective view seen from the vehicle interior side of the cover body of an airbag apparatus same as the above. It is the perspective view seen from the cover body of the airbag apparatus same as the above. It is a perspective view of the 1st backing part of the inner part of the cover body of an airbag apparatus same as the above. It is explanatory drawing which shows operation | movement of an airbag apparatus same as the above, (a) is before deployment, (b) is at the time of deployment. It is a perspective view of the 1st backing part of the inner body of the cover body of the airbag apparatus which shows other embodiment of this invention. It is a perspective view of the 1st backing part of the inner body of the cover body of the airbag apparatus which shows other embodiment of this invention. It is a perspective view of the 1st backing part of the inner body of the cover body of the airbag apparatus which shows other embodiment of this invention.

Explanation of symbols

1 Door 2 Car compartment
15 Windows constituting the side
21 Airbag device
22 Cover body
31 airbag
33 Inflator
65 Side panel as main unit
66 Edge piece
73 Door
86 Hinge
87 Support piece
91 Guide protrusion
96 Mounting bracket
99 planned fracture
99a Upper part of the guide projection

Claims (4)

A cover body for an airbag used in an airbag apparatus including an airbag that is folded and stored in a side portion of a passenger compartment and in which gas is introduced and inflated and deployed upward along a side surface portion of the passenger compartment.
A main body that covers the side of the airbag stored in a folded manner toward the side of the vehicle interior;
A door portion covering the upper side of the airbag;
A hinge part that connects the body part and the door part so as to be bendable;
An air bag cover body comprising: a guide protrusion that protrudes downward from the lower surface of the door portion and abuts against an inflating and deploying air bag and guides the air bag outward. . An edge piece projecting downward from the edge of the door on the outside of the passenger compartment;
The airbag cover body according to claim 1, wherein a height position of a lower end portion of the guide protrusion is set in accordance with a height position of a lower end portion of the edge piece portion. A support piece located on the side of the vehicle interior of the edge piece and projecting downward from the lower surface of the door; and
An attachment fixing portion provided on the support piece portion and supported by a member of a side surface portion of the passenger compartment,
The support piece portion is provided above the mounting portion, and is broken at a pressure at which the airbag is inflated and deployed, and the upper portion after the breakage includes a planned breakage portion constituting a guide protrusion. The airbag cover body according to claim 1 or 2, characterized in that: An airbag that is folded and stored in a door portion on the side of the passenger compartment and gas is introduced and deployed upward along the side surface of the passenger compartment;
An inflator for supplying gas to the airbag;
An air bag apparatus comprising: a cover body according to any one of claims 1 to 3, wherein a main body portion constitutes an interior material of the door portion.

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