JP5172784B2 - Airbag device - Google Patents

Description

  The present invention relates to an airbag device that deploys a bag body by gas pressure when an impact is input.

  As a vehicle airbag device, a bag body that is expanded by gas pressure at the time of impact input is folded into a long rod shape, and the bag body is attached to the side of the vehicle body together with a bag cover that covers the outer area of the bag body on the vehicle interior side. Is known (for example, see Patent Document 1).

  The airbag device described in Patent Document 1 is disposed on the inner side surface of a side door of an open roof type vehicle in which a roof can be opened and closed or detached, and is deployed between the door and the occupant during a side collision or the like. It is the airbag apparatus which protects.

JP 2008-213621 A

In an open roof type vehicle, it may be raining while driving with the roof open, or it may be raining while parking with the roof open. There is sex.
In the airbag device installed on the inner side surface of the side door, the main part such as a bag body is covered with a bag cover, and rain or the like does not directly fall on the main part.

However, when the bag cover gets wet, it cannot be said that there is no possibility that the water gets into the inside of the bag cover through the bag cover and the main part gets wet. The penetration of water into the main part is not a favorable environment for the airbag apparatus.
Therefore, the present invention provides an airbag device that can prevent the main portion disposed inside the bag cover from getting wet.

The airbag device according to the present invention employs the following means in order to solve the above problems.
The invention according to claim 1 covers the vehicle interior side of a folded bag body (for example, a bag body 19 in an embodiment described later), and the bag body serves as a gas supply unit (for example, an inflator 18 in an embodiment described later). , A bag cover (for example, a bag in the embodiment described later) in which an opening (for example, an opening 40 in the embodiment described later) is formed when the bag body is expanded by introducing gas pressure from the diffuser pipe 22). A cover 21), and a retainer (for example, a retainer 20 in an embodiment to be described later) disposed inside the bag cover and fixed to the vehicle body side to hold the bag cover and accommodate and support the bag body. An airbag device (for example, an airbag module 9 in an embodiment described later), wherein the bag cover is fixed to the vehicle body side. Forming a design surface (for example, a design surface portion 35d in the embodiment described later) that is disposed adjacent to the lining member (for example, the door lining 2 in the embodiment described later) and faces the vehicle interior together with the lining member, A drainage channel (for example, a drainage channel in an example described later) that guides water that has entered from the space between the lining member to an edge adjacent to the lining member to a drainage position (for example, a drainage hole 93 in an example described later). 86).
By configuring in this way, the water that has entered from between the bag cover and the lining member is guided to the drainage position through the drainage channel, so that the main parts such as the bag body and the gas supply unit are covered with water. Can be prevented.

According to a second aspect of the present invention, in the first aspect of the present invention, the drainage channel has a vehicle interior side opened, and a bottom wall inclined upward toward the opening (for example, an opening 92 in an embodiment described later). (For example, a bottom wall 90 in an embodiment to be described later), and an edge of the lining member (for example, an engaging convex portion 102 in an embodiment to be described later) is inserted from the opening.
By comprising in this way, the water which permeated from between the bag cover and the lining member and introduced into the drainage channel can be reliably guided to the drainage position without overflowing from the drainage channel.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the bottom wall of the drainage channel at the drainage position is provided with a drainage hole (for example, a drainage hole 93 in an embodiment described later). It is characterized by.
By comprising in this way, the water induced | guided | derived via the drainage channel can be drained in the preset drainage position.

The invention according to a fourth aspect is the invention according to any one of the first to third aspects, wherein the gas supply unit has a lowest point in the middle of the longitudinal direction (for example, connection in an embodiment described later). Part 34), and is arranged so as to have an upward slope as it goes from the lowest point to both ends.
With this configuration, even if the gas supply unit is flooded, water applied to the gas supply unit can be guided to the lowest point.

According to the first aspect of the present invention, it is possible to prevent the main parts such as the bag body and the gas supply part from being wetted, so that it is possible to avoid an unfavorable environment for the airbag apparatus.
According to the second aspect of the present invention, the water introduced into the drainage channel that has entered from between the bag cover and the lining member can be reliably guided to the drainage position without overflowing the drainage channel.
According to the invention which concerns on Claim 3, the water induced | guided | derived via the drainage channel can be drained in the preset drainage position.
According to the fourth aspect of the present invention, even if the gas supply unit is flooded, water applied to the gas supply unit can be guided to the lowest point and dropped.

It is the front view which looked at the vehicle door carrying the airbag apparatus which concerns on this invention from the vehicle interior side. It is the front view seen from the vehicle interior side of the vehicle door which shows the attachment state of the said airbag apparatus. It is AA sectional drawing of FIG. It is a disassembled perspective view of the said airbag apparatus. It is a rear view of the airbag apparatus. It is the perspective view seen through the bag cover in the said airbag apparatus. It is a perspective view of the inflator and diffuser pipe in the said airbag apparatus. It is a figure explaining the attachment angle of the inflator and diffuser pipe in the said airbag apparatus. It is a perspective view of the bag cover of the airbag apparatus. It is the perspective view which looked at the part by the side of the front part of the said airbag apparatus from the diagonally slightly upper direction. It is the perspective view which looked at the front part side of the above-mentioned airbag device from the slanting front upper part. It is BB sectional drawing of FIG. (A) is CC sectional drawing of FIG. 10, (B) is a figure explaining the penetration | invasion path | route of water.

  Embodiments of an airbag apparatus according to the present invention will be described below with reference to the drawings of FIGS. In the drawings, the upper side and the front side of the vehicle are indicated by arrows UP and FR, respectively.

FIG. 1 is a view of the front side door 1 on the right side in the traveling direction of the vehicle as viewed from the vehicle interior side. FIG. 2 is a partial view of the front side door 1 of FIG. 1 such as a door lining (lining member) 2. FIG. 3 is a cross-sectional view corresponding to the AA cross section of FIG.
The vehicle in this embodiment is an open roof type vehicle in which the roof can be opened and closed or detached. The front side door 1 of this vehicle is a so-called sashless type door that does not have a window frame, and a door glass 4 is held on the door body 3 so as to be movable up and down. The door main body 3 includes a door skeleton 5 and a door skin 6 (see FIG. 3) attached to the outside of the door skeleton 5.

  As shown in FIG. 2, a mirror base 8 for attaching a door mirror (not shown) is integrally provided on the front upper end side of the door body 3, and modularized at the upper edge of the door body 3 on the vehicle interior side. A mounting bracket 10 for mounting the airbag device 9 (hereinafter referred to as “airbag module 9”) is provided.

  As shown in FIG. 2, the mounting bracket 10 includes a flat plate-like base plate portion 11 that extends in the longitudinal direction of the vehicle body along the upper end portion of the door body 3, and an airbag is provided at the upper edge portion of the base plate portion 11. The fastening piece 12A and three airbag locking claws 13A, 13B, 13C are extended upward. The airbag fastening pieces 12A are disposed at positions closer to the front of the vehicle body of the base plate portion 11, and the airbag latching claws 13A, 13B, 13C are disposed at substantially equal intervals in the vehicle body central region of the base plate portion 11. Air bag fastening pieces 12B and 12C extend from the lower edge portion of the base plate portion 11 near the front of the vehicle body.

  As shown in FIG. 3, the mounting bracket 10 is fixed to the door body 3 in contact with the upper portion of the door skeleton 5, and the airbag latching claws 13A, 13B, 13C It protrudes upward away from the skeleton 5. Further, a weather strip 16 on the inside of the vehicle that is slidably in close contact with the inner surface of the door glass 4 is attached to the flange portion 15 a formed on the upper edge of the door frame portion 5. In FIG. 3, reference numeral 17 denotes a weather strip on the outside of the vehicle that is attached to the upper end of the door skin 6 and is slidably in close contact with the outside surface of the door glass 4.

FIG. 4 is a perspective view showing a state where the airbag module 9 is disassembled, and FIG. 5 is a rear view of the airbag module 9.
As shown in these figures, the airbag module 9 is deployed by receiving a cylindrical inflator 18 that generates high-pressure gas when an impact is detected by a sensor (not shown), and gas pressure generated by the inflator 18. The folded bag body 19 (see FIGS. 2 and 3), the inflator 18 and a metal retainer 20 that holds the bag body 19, and the outer side of the folded bag body 19 on the vehicle interior side are covered to form a bag body. A bag cover 21 that allows the bag body 19 to be unfolded by opening a portion when the 19 is unfolded.

FIG. 6 is a perspective view of the airbag module 9 seen through the bag cover 21, and a diffuser pipe 22 is connected to the inflator 18, and the diffuser pipe 22 passes through the bottom of the folded bag body 19. ing. As shown in FIG. 7, the diffuser pipe 22 has a front end portion 22a closed, and a plurality of gas discharge holes 22b are formed on the outer peripheral surface in the middle. The gas discharge holes 22 b communicate with the inside and outside of the diffuser pipe 22 and open upward, and the diffuser pipe 22 is arranged so that all the gas discharge holes 22 b are located in the bag body 19. A seal tape 28 is attached to the outer peripheral surface of the diffuser pipe 22 including each gas discharge hole 22b around the gas discharge hole 22b. The seal tape 28 is formed of non-permeable paper or resin that does not allow liquid to pass through, and the gas discharge hole 22b is blocked by the seal tape 28, so that water flows from the outside to the inside of the diffuser pipe 22. Intrusion is prevented. Further, when the gas generated by the inflator 18 is supplied to the diffuser pipe 22, the seal tape 28 is peeled off from the outer peripheral surface of the diffuser pipe 22 by the gas pressure, or is cleaved by the gas pressure. It is configured. In this embodiment, the inflator 18 and the diffuser pipe 22 constitute a gas supply unit.
The portion where the diffuser pipe 22 penetrates the bag body 19 is sealed by appropriate means such as tightening with a band (not shown) from the top of the bag body 19.
The bag body 19 is folded up and down with the front and rear edges folded back, and is arranged in a long shape along the longitudinal direction of the diffuser pipe 22.

  The retainer 20 is integrally coupled to the vehicle interior side of the base plate 23 that is substantially flat in the longitudinal direction of the vehicle body, and holds the diffuser pipe 22 and the side and bottom side of the bag body 19 on the vehicle interior side. And a holding plate 24 having a substantially L-shaped cross section. The inflator 18 and the diffuser pipe 22 are coupled to the inner surface of the base plate 23, and the holding plate 24 is integrally coupled to the inner portion of the bag cover 21 before coupling to the base plate 23, as shown in FIG. . The base plate 23 and the holding plate 24 are bolts when the bag cover 21 is finally assembled to an assembly in which the inflator 18 and the bag body 19 are coupled to the base plate 23 (hereinafter referred to as “base plate side unit 23U”). They are connected to each other by bonding or riveting.

  The coupling of the inflator 18 and the diffuser pipe 22 to the base plate 23 will be described in detail. As shown in FIGS. 4 and 6, a bracket 30 that holds the outer peripheral surface of the inflator 18 is attached to the inflator 18. A lower arm 31 extending to the base plate 23 is bolted to the front end side of the base plate 23. An upper arm 32 extending upward is provided on the bracket 30, and the upper arm 32 is bolted to the airbag fastening piece 12 </ b> A of the mounting bracket 10. Further, the front end portion 22 a of the diffuser pipe 22 is bolted to the rear end side of the base plate 23 via a bracket 29. In other words, the gas supply unit constituted by the inflator 18 and the diffuser pipe 22 is fixed to the front end side and the rear end side of the base plate 23.

  Also, as shown in FIG. 8, the mounting angle between the inflator 18 and the diffuser pipe 22 is inclined with respect to the horizontal line H in the vehicle body, and both axial centers G1 and G2 are They are arranged to cross each other. More specifically, the axial center G1 of the inflator 18 is disposed so as to incline upward toward the front of the vehicle body with respect to the horizontal line H of the vehicle body, while the axial center G2 of the diffuser pipe 22 faces rearward with respect to the horizontal line H of the vehicle body. The connecting portion 34 between the inflator 18 and the diffuser pipe 22 is at the lowest level. As a result, when water droplets adhere to the outer surfaces of the inflator 18 or the diffuser pipe 22 for some reason such as condensation, the water droplets travel along the lower surface of the inflator 18 or the diffuser pipe 22 and gather at the connection portion 34 having the lowest level. Then, it comes to fall from this connection part 34.

  4 and 6, reference numeral 33a is a bolt hole for bolting the upper arm 32 to the airbag fastening piece 12A, and reference numerals 33b and 33c are lower brackets on the front side of the base plate 23 as mounting brackets. This is a bolt hole for bolting to 10 airbag fastening pieces 12B, 12C. The rear end portion of the base plate 23 is bolted to the mounting bracket 10 through a bolt hole 33d.

  Further, an end wall 25 is provided at each end in the longitudinal direction (vehicle body longitudinal direction) of the holding plate 24 so as to close an inner region of the substantially L-shaped basic cross section, and the end wall The connecting flange 25 a provided continuously to the base plate 25 is finally rivet fixed to the base plate 23. The retainer 20 formed by connecting the holding plate 24 to the base plate 23 opens in a substantially rectangular shape above the housing portion of the bag body 19, and the surface except for the upper side substantially surrounds the peripheral area of the bag body 19. .

  A corrugated plate member 26 is fixed at a plurality of locations on the upper edge portion of the base plate 23 on the door body 3 side, and sheath-shaped claw receiving portions 27A, 27B, and 27C are formed between the fixed portions of the plate member 26. ing. The claw receiving portions 27A, 27B, and 27C are opened to the lower side so that the airbag module 9 can be fitted to the corresponding airbag locking claws 13A, 13B, and 13C by covering the mounting bracket 10 from above. It has become.

  FIG. 9 is a view showing a state in which the bag cover 21 is viewed obliquely from the outside of the vehicle. As shown in this figure, the bag cover 21 is welded and fixed to a cover outer 35 that forms a design surface on the vehicle interior side of the front side door 1 together with the door lining 2 (see FIG. 1), and an inner side surface of the cover outer 35. And a cover inner 36 that performs a rigidity adjustment of each part on the bag cover 21 and a connecting function with other parts.

  As shown in FIG. 3, the cover outer 35 has a two-layer structure in which a skin material 35b made of a soft resin is integrally joined to the outside of a base material 35a made of a relatively hard resin material. In the cover outer 35, a side wall 38 that covers the vehicle interior side of the retainer 20 is smoothly and continuously formed on an upper wall 37 that covers the upper side of the opening of the retainer 20. As shown in FIGS. 1 and 2, the side wall 38 is formed to have a substantially pentagonal shape whose upper side is substantially horizontal when viewed from the side. When the bag cover 21 is finally attached to the base plate side unit 23U, the inflator 18 and the front end portion of the base plate 23 protrude forward of the cover outer 35 (see FIG. 2). Also, a bent wall 39 that is bent downward in a substantially L shape is provided at the end of the upper wall 37 on the door body 3 side. When the airbag module 9 is attached to the door body 3, the bent wall 39 extends to the vicinity of the weather strip 16 on the vehicle interior side as shown in FIG. The lip 16a is in close contact.

  As shown in FIGS. 4, 5, and 9, the upper wall 37 and the bent wall 39 of the cover outer 35 are provided with breakage guide portions 41 for forming an opening 40 that allows the bag body 19 to be unfolded. . The breakage guiding portion 41 is configured by, for example, forming a V-shaped groove on the back surface of the base material 35a of the cover outer 35. Further, the breakage guide portion 41 is provided corresponding to the front and rear positions of the folded bag body 19, and when the bag body 19 is unfolded, the region surrounded by the breakage guide portion 41 on the cover outer 35 is pressed against the bag body 19. It is designed to jump up like a lid. The substantially rectangular area on the cover outer 35 that jumps up like a lid when the bag body 19 is deployed will be referred to as a lid area 42 below. The side of the base side of the lid region 42 is a bent base line portion 44 (hinge portion) in which the central region excluding the front and rear edges thereof serves as the rotation starting point of the lid region 42. In the case of this embodiment, the breakage guide portions 41 before and after the lid region 42 are provided so as to wrap around in a substantially L shape up to a part of the base side of the lid region 42.

  The cover inner 36 is made of a relatively hard resin material and includes an upper wall 45 and a side wall 46 that are welded and fixed to the upper wall 37 and the side wall 38 of the cover outer 35, respectively, as shown in FIGS. The upper wall 45 is provided with a dotted cutout portion 47 (see FIG. 9) that is substantially U-shaped and elongated in the longitudinal direction of the vehicle body, and in the cutout portion 47, an approximate portion corresponding to the lid region 42 of the cover outer 35. A rectangular lid wall 48 is arranged. The lid wall 48 is integrally welded and fixed to the back surface of the lid region 42 of the cover outer 35.

  In addition, a plurality of raised portions 49 are provided at the lower edge of the side wall 46, and a locking hole 50 is provided in each raised portion 49. As shown in FIG. 3, a locking hook 51 extending on the holding plate 24 of the retainer 20 is inserted into and engaged with each locking hole 50. Therefore, the side wall 46 of the cover inner 36 is locked to the retainer 20, and serves as a support portion that is supported on the door body 3 side via the retainer 20. 3 and 9, a resin fastening block 52 is welded and fixed separately from the cover inner 36 to the back surface of the side wall 38 of the cover outer 35, and the holding plate 24 is attached to the fastening block 52. It is fixed with screws.

  The lid wall 48 is integrally connected to the upper portion of the side wall 46 via a plurality of strips 53 formed in the discontinuous portion of the notch portion 47. Each belt-like piece 53 is curved in an arc shape so as to bulge downward, and is separated from the cover outer 35 without being welded. These band-like pieces 53... Function as hinge portions when the lid wall 48 is flipped up and rotated.

  Here, in the bag cover 21 of this embodiment, when the cover outer 35 and the cover inner 36 are integrally welded, the lid region 42 on the cover outer 35 side and the lid wall 48 on the cover inner 36 side are when the bag body 19 is deployed. A lid portion that opens the opening 40 is configured, and a bent base line portion 44 on the cover outer 35 side and a strip-like piece 53 on the cover inner 36 side constitute a hinge portion that serves as a pivotal fulcrum of the lid portion.

  Further, as shown in FIG. 9, flange walls 54 and 54 straddling the upper wall 45 and the side wall 46 are respectively provided on the outer positions in the front-rear direction of the notch portion 47 of the cover inner 36. 54 is connected to the end walls 25, 25 of the holding plate 24 of the retainer 20 by bolts 55 (see FIG. 4).

In addition, a breakable wall 60 is extended downward on the lower surface of the lid wall 48 of the cover inner 36 on the free end side that is separated from the strips 53. A breakage accelerating portion 61 is formed at the base of the breakable wall 60, and a plurality of connecting pieces 57 are provided at predetermined intervals on the tip side of the breakage accelerating portion 61. The breakage promoting portion 61 is formed thin, and a number of long holes 62 are arranged in a line along the longitudinal direction.
Each connecting piece 57 is rivet fixed to the base plate 23 of the retainer 20. The rivet fixing of the connecting piece 57 may be fixed to the base plate 23 together with the corrugated plate member 26 when the bag cover 21 is finally assembled to the base plate side unit 23U, for example.

FIG. 10 is a perspective view of a portion of the front side of the airbag module 9 as viewed from slightly diagonally above the vehicle interior. FIG. 11 is a perspective view of a portion where the inflator 18 protrudes from the front end of the cover outer 35 from diagonally forward. It is a perspective view.
As shown in FIGS. 1, 2, and 10, the front edge upper half portion 35 </ b> A and the front edge lower half portion 35 </ b> B of the cover outer 35 are lowered toward the rear of the vehicle body, while the rear lower edge 35 </ b> C of the cover outer 35. Is lowered as it goes forward of the vehicle body, and the connecting portion between the lower half portion 35B of the front edge and the lower lower edge 35C is the lowermost portion 35D.

  As shown in FIGS. 10 and 11, the cover outer 35 is provided with a flange 80 that is not covered with the skin material 35 b and exposes the base material 35 a in the upper half portion 35 </ b> A of the front edge. The flange portion 80 is formed so as to be recessed downward from a portion (hereinafter referred to as a design surface portion 35d) that is covered with the skin material 35b of the base material 35a and serves as a design surface on the vehicle interior side, and projects outward. It is formed on an inclined surface that goes down as it goes to the vehicle interior side. The flange 80 is disposed above the rear portion of the inflator 18 and is disposed at a position covered with the door lining 2 when attached to the door body 3. The edge portion of the door lining 2 is disposed opposite to the step surface 94 formed between the design surface portion 35d and the flange portion 80.

  The flange 80 is partitioned by a standing wall 81 into a front flange 82 and a rear flange 83. A holding portion 84 having a clip hole 84a is provided on the vehicle outer side of the front flange portion 82. As shown in FIG. 12, the door lining 2 is attached to the door lining 2 through a clip 85 fitted in the clip hole 84a. The provided leg portion 101 is fastened. An end portion 82 a on the vehicle interior side of the front side flange portion 82 is bent downward, and a tip end of the end portion 82 a is substantially in contact with the outer peripheral surface of the inflator 18. In FIG. 12, reference numeral 108 denotes a garnish.

  In the unlikely event that water enters from between the door lining 2 and the cover outer 35, the rear flange 83 prevents the water from falling onto the inflator 18 by receiving the water at the rear flange 83. The end of the rear collar 83 on the vehicle interior side is a collar 83a having an inclined surface slightly inclined upward toward the vehicle interior, and the water received by the rear collar 83 is the collar 83a. It is comprised so that it can guide to the rear end of the rear side collar part 83, without overflowing from the outside. Further, a downwardly extending wall 83b extending downward is continuously provided from the edge of the flange 83a on the vehicle interior side.

Further, a drainage path 86 is provided in the lower half portion 35B of the front edge of the cover outer 35 along the edge of the cover outer 35 adjacent to the door lining 2. More specifically, as shown in FIG. 13 (A), a groove portion 87 is provided at the edge of the cover outer 35 so as to be recessed from the design surface portion 35d to the vehicle exterior side. The groove portion 87 is connected to the design surface portion 35d and is inclined downward toward the vehicle outer side, an end wall 89 formed to be bent at a substantially right angle from the front end of the upper wall 88, and from the lower end of the end wall 89 to the vehicle interior side. A bottom wall 90 that is bent substantially at a right angle and is substantially parallel to the upper wall 88 is provided, and the inside of the groove 87 is a drainage channel 86. An opening 92 that opens toward the vehicle interior is formed between the upper wall 88 and the bottom wall 90, and the bottom wall 90 is formed of an inclined surface that is inclined upward toward the opening. Further, a lower extending wall 91 extending downward is continuously provided at the end of the bottom wall 90 on the vehicle interior side, and the door lining 2 is fastened to the lower extending wall 91 as shown in FIG. For this purpose, holding portions 91a and 91a are provided continuously. The means for fastening the door lining 2 to the holding portions 91a and 91a is the same clip as the fastening means to the holding portion 84 in the collar portion 80.
It is to be noted that the skin portion 35b is covered with the skin material 35b in the groove portion 87 up to the upper wall 88 in the groove portion 87, and the base wall 35a is exposed at the end wall 89, the bottom wall 90, and the lower extending wall 91. The edge of the door lining 2 is disposed opposite to the upper wall 88.

  Further, the flange 83a of the rear flange 83 is integrally connected to the bottom wall 90 of the groove 87, and the lower extending wall 83b of the rear flange 83 is integrally connected to the lower extending wall 91 of the front edge lower half portion 35B. The end wall 89 of the groove part 87 of the collar part 80 is formed so as to rise to the vehicle interior side as it advances forward of the vehicle body, and is finally connected to the rear collar part 83. Further, the upper wall 88 of the groove 87 is connected to the step surface 94 in the upper half portion 35A of the front edge.

  As shown in FIG. 13A, the edge portion of the door lining 2 is fitted in the groove portion 87. More specifically, the door lining 2 has a two-layer structure in which a skin material 2b made of a soft resin is integrally joined to the outside of a base material 2a made of a relatively hard resin material. In the door lining 2, a portion serving as a design surface on the vehicle interior side (hereinafter referred to as a design surface portion 2 c) is disposed so as to be substantially flush with the design surface portion 35 d of the cover outer 35. On the edge of the door lining 2 adjacent to the bag cover 21, an engaging convex portion 102 that protrudes obliquely downward toward the vehicle outer side is provided. The engaging convex portion 102 is formed so that the tip side is gradually narrowed, and only the upper surface 103 is covered with the skin material 2b. The engaging convex portion 102 is inserted into the groove portion 87 of the cover outer 35, the front end surface 104 of the engaging convex portion 102 faces the end wall 89 of the groove portion 87, and the lower surface 105 of the engaging convex portion 102 is the bottom wall of the groove portion 87. Opposite to 90. A plurality of ribs 106 are provided on the front end surface 104 of the engaging convex portion 102 at appropriate intervals, and the plurality of ribs 107 are also displaced from the rib 106 in the front-rear direction on the lower surface 105 of the engaging convex portion 102. Are provided at appropriate intervals. By providing the ribs 106 and 107 on the engaging convex portion 102, the flow path 109 through which water flows is secured at the corner where the end wall 89 and the bottom wall 90 of the groove portion 87 intersect.

The drainage channel 86 is also provided at the rear lower edge 35C of the cover outer 35, and the drainage channel 86 of the lower half portion 35B of the front edge and the drainage channel 86 of the rear lower edge 35C are connected at the lowermost portion 35D. A drainage hole 93 communicating with the flow path 109 is formed near the end wall 89 of the bottom wall 90 in the lower portion 35D. The lowermost portion 35D is positioned below the inflator 18 and the bag body 19.
In the state where the engaging convex portion 102 is inserted into the groove portion 87 of the cover outer 35, the skin material 2b on the upper surface 103 of the engaging convex portion 102 is configured to be in close contact with the skin material 35b on the upper wall 88 of the groove portion 87. Has been.

When the airbag module 9 configured as described above is attached to the door body 3, the mounting bracket 10 is previously attached to the upper portion of the door body 3, and the airbag locking claws 13A of the mounting bracket 10 in that state are attached. By fitting the claw receiving portions 27A, 27B, and 27C of the airbag module 9 into the airbag 13 from above, the airbag module 9 is temporarily fixed to the door body 3.
Thereafter, the airbag module 9 is accurately positioned with respect to the door body 3, and the retainer 20 (base plate 23) of the airbag module 9 is bolted to the mounting bracket 10. Therefore, the breakable wall 60 in the cover inner 36 of the bag cover 21 is coupled to the vehicle body side before the bag body 19 is deployed.
Thereafter, the door lining 2 is attached to the vehicle interior side of the door body 3 so as to be associated with the bag cover 21 of the airbag module 9. In addition, since the fixing method to the door main body 3 of the door lining 2 is the same as the past, description is abbreviate | omitted.

When the airbag module 9 is attached to the door body 3 as described above, the inflator 18 and the bag body 19 are fixed to the door body 3 via the retainer 20, and the upper side of the bag body 19 is the lid portion of the bag cover 21 ( The lid area 42 and the lid wall 48) will be covered.
Further, at this time, the bent wall 39 of the bag cover 21 faces the side surface of the door glass 4 with a minute gap, and the outer lip 16a of the weather strip 16 on the door body 3 side is formed on the outer surface of the bent wall 39. Closely. Accordingly, the upper end portion of the bag cover 21 is opposed to the upper portion of the door body 3 with a sufficient width in the height direction at the bent wall 39 portion, and the weather strip 16 is in close contact with the bent wall 39 so that a gap therebetween is formed. Is buried. In the bag cover 21, a substantially L-shaped bent wall 39 is connected to the end of the upper wall 37 on the door body 3 side, so that the rigidity of the end of the upper wall 37 is maintained sufficiently high. ing. Therefore, by adopting this bag cover 21, merchantability including appearance quality can be enhanced.

  When a large impact is input to the vehicle and the airbag module 9 is activated, the bag body 19 starts to be deployed by introducing gas pressure from the inflator 18 to the bag body 19, and the bag body 19 is moved upward from the retainer 20. Try to jump out. At this time, when the bag body 19 presses the lid portion (the lid wall 48 and the lid region 42) of the bag cover 21 from the back surface side, the breakage promoting portion 61 of the cover inner 36 is cleaved along the longitudinal direction and the breakable wall 60 is broken. And the end of the lid wall 48 is separated from the breakable wall 60, and the cover outer 35 is broken at the breakage guiding portion 41, so that the lid wall 48 of the cover inner 36 and the lid region 42 of the cover outer 35 are separated. It is integrally pushed to the inside of the vehicle and further rotated to the inside of the vehicle with the hinge portion as the center of rotation. Thereby, the opening 40 is formed in the upper wall 37 of the bag cover 21, and the bag body 19 is developed from the opening 40 to the upper side of the vehicle interior.

  By the way, in the case of an open roof type vehicle, it is assumed that it will rain during traveling with the roof opened, or it may rain during parking with the roof opened. In such a case, the front side door 1 The cover outer 35 and the door lining 2 of the airbag module 9 disposed on the vehicle interior side are also flooded. Then, water may enter from between the cover outer 35 and the door lining 2.

  However, in this airbag module 9, since the cover outer 35 is provided with the flange 80 and the drainage channel 86, even if water enters from between the cover outer 35 and the door lining 2, Water does not fall on the main parts of the airbag module 9 such as the inflator 18 and the bag body 19.

  More specifically, for example, when water enters between the front edge upper half portion 35 </ b> A of the cover outer 35 and the door lining 2, the water falls on the rear flange 83 and moves over the rear flange 83. While flowing down toward the flange 83a, it flows toward the rear of the vehicle body, and finally flows into the drainage channel 86 of the lower half portion 35B of the front edge. Here, since the collar portion 83a is inclined upward toward the vehicle interior side, water does not overflow from the end portion of the collar portion 83a on the vehicle interior side.

When water enters from between the front edge lower half portion 35B of the cover outer 35 and the door lining 2, as shown in FIG. 13 (B), the water W passes through the upper wall 88 of the groove portion 87 of the cover outer 35 and the door. It passes between the upper surface 103 of the engaging convex portion 102 of the lining 2 and enters the groove portion 87 to reach the drainage channel 86. The water that has reached the drainage channel 86 flows through the drainage channel 86 toward the lowermost part 35D, is discharged from a drainage hole 93 provided in the groove part 87 of the lowermost part 35D, and falls.
The same applies to the case where water enters from between the rear lower edge 35C of the cover outer 35 and the door lining 2, and the intruded water is collected in a drainage channel 86 provided in the rear lower edge 35C, and drainage holes 93 It is discharged from and falls.

  As described above, the lowermost portion 35D where the drainage hole 93 is provided is positioned below the inflator 18 and the bag body 19, so that even if water is dropped from the drainage hole 93, It does not fall on the bag body 19 or the like. Therefore, even if water intrudes from between the cover outer 35 and the door lining 2, the infiltrated water can be guided and drained to the drainage hole 93 which is a preset drainage position. It is possible to reliably prevent the bag body 19 and the like from getting wet, and to avoid an undesirable environment for the airbag module 9.

In addition, since the bottom wall 90 of the groove 87 constituting the drainage channel 86 is inclined upward toward the opening 92 of the drainage channel 86, water does not overflow from the drainage channel 86, and the infiltrated water is drained from the drainage channel 86. It can be reliably guided to the drain hole 93 without overflowing.
Further, the presence of the flange 80 and the drainage channel 86 can reliably prevent the gas discharge hole 22b of the diffuser pipe 22 from being wetted.

  Even when water droplets adhere to the outer peripheral surface of the inflator 18 or the diffuser pipe 22 due to condensation or an unexpected event, the axial centers G1 and G2 of the inflator 18 and the diffuser pipe 22 are arranged so as to cross each other. Since the portion 34 is at the lowest level (the lowest point), the water droplets adhering to the outer surfaces of the inflator 18 and the diffuser pipe 22 travel along the lower surface of the inflator 18 and the diffuser pipe 22 and have the lowest level connection portion. 34 and can be dropped from this connection 34.

  Further, the gas discharge hole 22b of the diffuser pipe 22 is accommodated in the bag body 19, the portion where the diffuser pipe 22 penetrates the bag body 19 is closed, and the bag body 19 is impermeable to water. The discharge hole 22b is disposed in a space isolated from water. However, when considering the case where condensation occurs in the bag body 19 or water enters the bag body 19 for some unexpected reason, the gas discharge hole 22b of the diffuser pipe 22 in the airbag module 9 has a sealing tape. Therefore, when the airbag module 9 is not operated before the impact is input, it is possible to prevent water from entering from the outside to the inside of the diffuser pipe 22. As a result, it is possible to prevent the diffuser pipe 22 and the inside of the inflator 18 connected to the diffuser pipe 22 from being rusted. On the other hand, at the time of impact input, the gas pressure supplied from the inflator 18 releases the blockage of the gas discharge hole 22b closed by the seal tape 28, so that the gas pressure is supplied from the gas discharge hole 22b to the bag body 19. And the airbag module 9 can be operated properly.

2 Door lining (lining material)
9 Airbag module (airbag device)
18 Inflator (gas supply part)
19 Bag body 20 Retainer 21 Bag cover 22 Diffuser pipe (gas supply part)
34 Connection (bottom point)
35d Design surface (design surface)
40 Opening 86 Drainage channel 90 Bottom wall 92 Opening 93 Drainage hole (drainage position)
102 engaging convex part (edge of lining member)

Claims (4)

A bag cover that covers the vehicle interior side of the folded bag body, and that has an opening for deployment of the bag body when the bag body is deployed by introducing gas pressure from a gas supply unit;
A retainer disposed inside the bag cover and fixed to the vehicle body side to hold the bag cover and accommodate and support the bag body;
An airbag device comprising:
The bag cover is disposed adjacent to a lining member fixed to a vehicle body side, forms a design surface facing the vehicle interior side together with the lining member, and the lining member and an edge adjacent to the lining member An air bag apparatus comprising a drainage channel that guides water that has entered from between to a drainage position.   2. The air according to claim 1, wherein the drainage channel has an opening on the vehicle interior side, and has a bottom wall that is inclined upward toward the opening, and an edge of the lining member is inserted through the opening. Bag device.   The airbag apparatus according to claim 1 or 2, wherein a drainage hole is provided in the bottom wall of the drainage channel at the drainage position.   The gas supply unit is arranged so that an intermediate point in the longitudinal direction has a lowest point, and the gas supply unit has an upward slope as it goes from the lowest point to both ends. The airbag device according to any one of the above.

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