Side airbag device

Abstract

A side airbag device capable of suppressing interference between a wiring harness and an airbag is provided. The side airbag device (1) is arranged between a vehicle body (B) and a seat (S). The side airbag device (1) comprises an airbag module (10), a base component (20), and a retaining ring component (50). The airbag module (10) comprises an airbag (11) that can be ejected and an inflator (12) that supplies gas to the interior of the airbag (11); the base component (20) comprises a concave airbag storage portion (21) for storing the airbag module (10) and is installed between a vehicle door (D) and a seat (S); and the retaining ring component (50) holds the airbag storage portion (21) from the rear side of the vehicle body. The base component (20) comprises a first through hole (24) for inserting a wiring harness (14) of the inflator (12) and a flange (25) formed around the first through hole (24). The retainer member (50) has a second through hole (52) through which the wiring harness (14) of the inflator (12) is inserted and which is provided at a position opposite to the first through hole (24).

Description

[0001] This application is a divisional application of patent application No. 201980018246.2 (PCT / JP2019 / 010103). Technical Field

[0002] The present invention relates to a side airbag device, and in particular to a side airbag device arranged on a seat of a vehicle. Background Art

[0003] For a long time, as a side airbag device arranged between the door and the seat in the width direction of the vehicle body, a device has been known (for example, refer to patent documents 1 and 2) that includes an inflator for injecting gas into the interior of the airbag, a box-shaped storage box for storing the airbag and the inflator, and a resin base cover for covering the storage box from the front side of the vehicle body.

[0004] Here, the side airbag device described in Patent Document 1 is configured such that after an airbag stored in a storage box is deployed by an inflator, the airbag breaks a thin wall portion of a base cover located on the front side of the vehicle body and deploys.

[0005] Specifically, the inflator and the vehicle-mounted battery are connected by a wiring harness. When an impact exceeding a certain value is applied from the side of the vehicle, ignition power is supplied from the vehicle-mounted battery to the inflator via the wiring harness, causing the airbag to pop out and deploy to the side of the occupant.

[0006] With the above-described configuration, the side airbag device can mitigate the impact applied to a seated occupant.

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2006-88850

[0008] Patent Document 2: International Publication No. 2012 / 035619 Summary of the Invention

[0009] However, in the side airbag device described in Patent Document 1, since the inflator is housed in a storage box located on the vehicle body rear side of the base cover, the shape of the wire harness extending from the vehicle-mounted battery to the inflator inside the storage box becomes complicated.

[0010] Therefore, if the wire harness is freely rotated due to vibrations from the seated person or the vehicle body, there is a possibility that the wire harness and the airbag may interfere with each other when the airbag pops up and deploys.

[0011] In particular, in the case of a side airbag disposed in the space between the vehicle body and the rear seat, since the component parts are installed in a narrow space, it takes time and effort to prevent the wiring harness and the airbag from interfering with each other.

[0012] Furthermore, in the conventional vehicle seat described above, the fabric bracket for mounting the fabric that guides the airbag's deployment direction is attached to the outside of the base member that houses the airbag. Assembling the fabric bracket to the outside of the base member increases the size of the side airbag device.

[0013] The present invention has been made in view of the above-mentioned problems, and an object thereof is to reduce the size of a side airbag device provided between a vehicle body and a seat.

[0014] Another object of the present invention is to provide a side airbag device capable of suppressing interference between a wire harness and an airbag.

[0015] The aforementioned problems are solved by the following means. The side airbag device according to the present invention is installed between a vehicle body and a seat and comprises an airbag module, a base member, and a retainer member. The airbag module comprises a deployable airbag and an inflator for supplying gas into the airbag. The base member comprises a concave airbag receiving portion for receiving the airbag module and is installed between the vehicle door and the seat. The retainer member holds the airbag receiving portion from the rear side of the vehicle body. The base member comprises a first through-hole for inserting a wiring harness of the inflator and a flange formed around the first through-hole. The retainer member comprises a second through-hole for inserting a wiring harness of the inflator and disposed opposite the first through-hole.

[0016] According to the side airbag device, the inflator wire harness can be passed through the base member and the retainer member without being routed outside the base member and the retainer member.

[0017] In the above-mentioned side airbag device, preferably, the airbag housing portion has a bottom portion and a side wall portion extending forward from the bottom portion, and the first through-hole is formed in the bottom portion.

[0018] In this manner, since the first through-hole is formed in the bottom portion located on the rear side of the base member, it is possible to suppress a decrease in the rigidity of the base member.

[0019] In the above-mentioned side airbag device, it is preferable that an inner peripheral surface of the flange is continuous with the first through-hole.

[0020] In this manner, it is possible to suppress the wire harness from coming into contact with the retainer member.

[0021] In the above-mentioned side airbag device, it is preferable that the first through-hole is provided above an upper end of the inflator.

[0022] In this manner, it is possible to suppress a decrease in the rigidity of the airbag storage portion that holds the inflator in the base member.

[0023] In the above-mentioned side airbag device, preferably, the airbag housing portion includes a boss portion projecting rearward from the bottom portion, and the first through-hole is provided below the boss portion.

[0024] In this manner, it is possible to suppress the wire harness from coming into contact with the hub portion.

[0025] In the above-mentioned side airbag device, it is preferable that the retainer member has a through hole for inserting the boss portion through the boss portion.

[0026] This facilitates positioning of the base member and the retainer member.

[0027] In the above-mentioned side airbag device, it is preferable that the first through-hole is formed at a position vertically parallel to the boss portion.

[0028] In this manner, the rigidity of the region in the vertical direction including the first through-hole in the base member can be increased.

[0029] In the above-mentioned side airbag device, preferably, the retainer member has a harness mounting portion for mounting the harness, and the second through-hole is provided below the harness mounting portion.

[0030] Like this, can keep the wire harness and make it extend upward more than 2nd through-hole.According to this, can effectively utilize the space behind the retainer member.

[0031] In the above-mentioned side airbag device, preferably, a fabric for guiding deployment of the airbag is provided, and the first through-hole is provided at a position closer to the seat than a broken portion at a front end to which the fabric is attached.

[0032] In this manner, by providing the first through-hole on the seat side, which has a wider layout than the door side, it is possible to suppress interference between accessories in the seat.

[0033] In the above-mentioned side airbag device, it is preferable that the base member has a skin hanging slit formed in a region adjacent to the airbag storage portion.

[0034] In this manner, it is possible to suppress the mutual interference between the end portion of the suspending cover and the wire harness.

[0035] The problem is solved by the following means: The side airbag device includes a fabric for guiding the deployment of the airbag and a fabric bracket for attaching the fabric, wherein the fabric bracket is attached to the inner surface of the airbag housing portion.

[0036] In this way, the fabric bracket is attached to the airbag storage portion of the base member. This allows the fabric bracket to be arranged so that it does not protrude outside the airbag storage portion. This allows the side airbag device to be miniaturized.

[0037] In the above-mentioned side airbag device, preferably, the airbag storage portion has a bottom portion and a side wall portion extending forward from the bottom portion, and the fabric bracket is mounted in contact with the side wall portion of the airbag storage portion.

[0038] In this way, the fabric bracket can be attached to the side wall of the airbag storage portion. Compared to attaching the fabric bracket to the bottom of the airbag storage portion, the distance between the fabric bracket and the break portion is shortened, thereby enabling the fabric to be shortened.

[0039] In the above side airbag device, the fabric bracket preferably includes a mounting portion mounted on the side wall portion of the airbag storage portion, and a first extending portion bent and extended from the mounting portion, wherein the first extending portion includes a first fabric holding portion that holds a first fabric.

[0040] In this way, the attachment portion attached to the airbag storage portion and the first extension portion attached to the first fabric are bent and connected. Therefore, since the first fabric is stretched, it is possible to suppress the fabric bracket from falling off the base member.

[0041] In the above-mentioned side airbag device, it is preferable that the fabric bracket has a convex portion formed around the first fabric holding portion and protruding forward.

[0042] In this way, the first fabric holding portion can be prevented from coming into contact with the base member.

[0043] In the above-mentioned side airbag device, it is preferred that the fabric bracket has a second extension portion bent and extended from the mounting portion, the second extension portion has a second fabric holding portion for holding a second fabric, and the second extension portion is connected to the opposite side of the first extension portion relative to the mounting portion and extends toward the opposite side of the first extension portion.

[0044] In this way, the tensile forces of the first and second fabrics can be offset. This can prevent the fabric bracket from falling off the base member.

[0045] According to the present invention, the wiring harness can be arranged so as not to interfere with the airbag.

[0046] According to the present invention, it is possible to suppress a decrease in the rigidity of the base member.

[0047] According to the present invention, it is possible to suppress the wire harness from coming into contact with the guard member.

[0048] According to the present invention, it is possible to suppress a decrease in the rigidity of the airbag storage portion that holds the inflator in the base member.

[0049] According to the present invention, it is possible to suppress the wire harness from coming into contact with the hub portion.

[0050] According to the present invention, positioning of the base member and the retainer member is facilitated.

[0051] According to the present invention, the rigidity of the region in the vertical direction including the first through hole in the base member can be improved.

[0052] According to the present invention, the space behind the retainer member can be effectively utilized.

[0053] According to the present invention, it is possible to suppress mutual interference between accessories in a seat.

[0054] According to the present invention, it is possible to suppress the mutual interference between the end portion of the suspending cover and the wire harness.

[0055] According to the present invention, the side airbag device can be miniaturized.

[0056] According to the present invention, the fabric can be shortened.

[0057] According to the present invention, it is possible to suppress the fabric bracket from falling off the base member.

[0058] According to the present invention, it is possible to suppress the first fabric from coming into contact with the base member.

[0059] According to the present invention, the tensile forces of the first fabric and the second fabric can be offset. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 It is an explanatory diagram showing the arrangement of the side airbag device according to the present embodiment.

[0061] Figure 2 for Figure 1 II-II cross-sectional view.

[0062] Figure 3 A diagram showing the attachment structure of the first and second fabrics to the tearing portion.

[0063] Figure 4 A diagram showing the side airbag device as seen from the rear.

[0064] Figure 5 This is an exploded perspective view of the side airbag assembly.

[0065] Figure 6 A diagram showing the installed state of the base component and the retainer component.

[0066] Figure 7This is a rear view of the side airbag device.

[0067] Figure 8 for Figure 7 VIII-VIII cross-sectional view of .

[0068] Figure 9 This is a partial enlarged view of the retaining ring component.

[0069] Figure 10 A diagram showing the overall structure of the retainer component.

[0070] Figure 11 This is a partial enlarged view of the retaining ring component.

[0071] Figure 12 This is the rear view of the base assembly.

[0072] Figure 13 for Figure 12 XIII-XIII cross-section view.

[0073] Figure 14 A diagram showing the overall structure of a fabric bracket.

[0074] Figure 15 A side view of the fabric bracket.

[0075] Figure 16 This is a top view of the fabric bracket with the first fabric and the second fabric mounted thereon.

[0076] Figure 17 It is an exploded perspective view of a side airbag device according to a modified example.

[0077] Figure 18 It is a diagram showing the overall structure of a retainer member according to a modified example. DETAILED DESCRIPTION

[0078] Below, refer to Figures 1-18 A side airbag device 1 according to an embodiment of the present invention (hereinafter referred to as the present embodiment) will be described.

[0079] A side airbag device 1 according to the present embodiment is installed between a seat S behind a driver's seat and a door D constituting a portion of a vehicle body B of a vehicle such as an automobile.

[0080] The embodiments described below are merely examples to facilitate understanding of the present invention and are not intended to limit the present invention. The shapes, sizes, and configurations of the components described below are not intended to deviate from the spirit of the present invention. While modifications and improvements may be made, the present invention encompasses equivalents.

[0081] In the following description, the “front-rear direction” refers to the front-rear direction as viewed by a person sitting in the seat S, and is the direction that coincides with the traveling direction of the vehicle.

[0082] The "seat width direction" refers to the lateral width of the seat S and corresponds to the left-right direction as viewed by the occupant of the seat S. The outer side in the seat width direction is the direction toward the door D closer to the side airbag device 1, while the inner side in the seat width direction is the opposite direction.

[0083] In addition, the “up-down direction” indicates the height direction of the seat S, and corresponds to the up-down direction of the seat S when viewed from the front.

[0084] <Structure of Side Airbag Device 1>

[0085] The side airbag device 1 of this embodiment is a device for alleviating the impact applied to the seated person from the side of the vehicle body. Figure 1 As shown, the side airbag device 1 is arranged between a seat back S1 serving as a backrest of a seat S and a door D of a vehicle body B in the vehicle body width direction.

[0086] Furthermore, in the present embodiment, one side airbag device 1 is disposed on each of the left and right outer sides of the seat S in the vehicle width direction.

[0087] like Figure 2 and Figure 5 As shown, the side airbag device 1 includes an airbag module 10 , a base member 20 , and a retainer member 50 as main components.

[0088] In addition, Figure 5 In FIG. 1 , the airbag 11 of the airbag module 10 is omitted for illustration.

[0089] The airbag module 10 includes, as main components, an airbag 11 serving as a deployable bag body and an inflator 12 for supplying gas into the airbag 11 .

[0090] like Figure 5 and Figure 7 As shown, the inflator 12 is an elongated, generally cylindrical gas generating device, and is configured to be elongated in the vertical direction.

[0091] Two bolts 13 are attached to the inflator 12 so as to protrude outward from the inflator 12. Details will be described later. The two bolts 13 are respectively passed through the opening 28 of the base member 20, the bolt insertion hole 49 of the fabric bracket 40, and the bolt insertion hole 51Ca of the retainer member 50, and are then tightened with nuts 16. This secures the inflator 12, fabric bracket 40, and retainer 50.

[0092] Furthermore, under normal circumstances, that is, when the airbag module 10 is inactive, the airbag 11 is folded. Furthermore, when an activation signal (ignition power) is input to the inflator 12 via the wiring harness 14, the inflator 12 generates gas and injects the gas into the airbag 11, causing the airbag 11 to deploy.

[0093] Here, the airbag 11 is surrounded on the left and right sides in the seat width direction by a first fabric 31 and a second fabric 32, respectively. Since the first fabric 31 is positioned inwardly of the airbag 11 in the seat span direction, it is also referred to as the inner fabric. Furthermore, since the second fabric 32 is positioned outwardly of the airbag 11 in the seat width direction, it is also referred to as the outer fabric.

[0094] The first woven fabric 31 and the second woven fabric 32 are collectively referred to as a woven fabric 30 . The woven fabric 30 is a member for guiding the deployment direction of the airbag 11 toward the rupture portion 70 .

[0095] like Figure 2 and Figure 3 As shown, the first fabric 31 has a first looped end portion 31A mounted on the rear end of the fabric bracket 40 and a first sewn portion 31C mounted on the front end of the tearing portion 70 serving as the tear line. The first looped end portion 31A of the first fabric 31 is a looped end portion formed by sewing two fabric pieces together at the first looped sewn portion 31B.

[0096] Similarly, the second fabric 32 has a second looped end portion 32A as an end portion attached to the fabric bracket 40, and a second sewn portion 32C attached to the tear portion 70 as a tear line as a front end. The second looped end portion 32A of the second fabric 32 is an end portion of a loop formed by sewing two pieces of fabric at the second loop-sewn portion 31B.

[0097] Furthermore, the first sewn portion 31C of the first fabric 31 and the second sewn portion 32C of the second fabric 32 are sewn to the breaking portion 70 provided in the skin material 71 covering the front surface of the airbag module 10. Specifically, Figure 2 As shown, the break portion 70 of the skin material 71 is installed between the first woven fabric 31 and the second woven fabric 32 .

[0098] When the airbag 11 pops out and deploys, the first sewn portion 31C of the first fabric 31 and the second sewn portion 32C of the second fabric 32 are pulled apart by the airbag 11, and the rupture portion 70 is broken, thereby allowing the airbag 11 to pop out from the rupture portion 70. In this way, when an impact exceeding a certain value is applied to the vehicle, the airbag 11 between the seat back S1 and the door D pops out from the rupture portion 70, thereby mitigating the impact on the passenger.

[0099] In addition, if Figure 3 As shown, the first stitched portion 31C of the first fabric 31 and the second stitched portion 32C of the second fabric 32 have different lengths in the vertical direction. Specifically, the second stitched portion 32C is longer than the first stitched portion 31C. This allows the airbag 11 to be deployed by first breaking near the center of the breakable portion 70, and then deploying the airbag 11 upward from that location. Furthermore, by deploying the airbag 11 from near the center of the breakable portion 70, the amount of scattering of the seat cushion 72 can be reduced.

[0100] <Structure of Fabric Bracket 40>

[0101] Next, refer to Figures 14 to 16 The structure of the fabric holder 40 that holds the rear ends of the first fabric 31 and the second fabric 32 will be described.

[0102] The fabric bracket 40 is a metal member including a first extending portion 41 , a second extending portion 42 , and a mounting portion 43 .

[0103] The mounting portion 43 has bolt insertion holes 49 for inserting the bolts 13 of the inflator 12 , and is fastened to the inflator 12 and the retainer member 50 with the bolts 13 of the inflator 12 inserted therethrough.

[0104] like Figure 2 As shown, when the fabric bracket 40 is mounted on the base member 20 and the retainer member 50, the mounting portion 43 is arranged to extend in the front-rear direction. At this time, the first extension portion 41 is located in front of the mounting portion 43, and the second extension portion 42 is located in the rear of the mounting portion 43.

[0105] That is, the first extension portion 41 is a portion extending outward in the seat width direction from the front end of the mounting portion 43 , and the second extension portion 42 is a portion extending inward in the seat width direction from the rear end of the mounting portion 43 .

[0106] The fabric bracket 40 has a first slit portion 45 formed from the mounting portion 43 to the first extension portion 41. Specifically, the first slit portion 45 includes a first opening 45A, a first curved portion 45B, and a first fabric holding portion 45C.

[0107] The first opening 45A is a slit region formed from the first end 40A to the second end 40B of the mounting portion 43 .

[0108] The first bent portion 45B is a slit region extending from the end portion of the first opening 45A opposite to the first end portion 40A toward the first extending portion 41 .

[0109] The first fabric holding portion 45C is a slit region connected to the first bent portion 45B and extending along the longitudinal direction of the first extension portion 41 .

[0110] Furthermore, the first bent portion 45B is connected to the first fabric holding portion 45C between both ends in the longitudinal direction of the first fabric holding portion 45C.

[0111] When the first fabric 31 is mounted on the fabric bracket 40, the first loop end portion 31A of the first fabric 31 is passed through the first opening 45A and the first curved portion 45B and passed through the first fabric holding portion 45C. Figure 16 As shown, the first loop end portion 31A of the first cloth 31 is held by the first cloth holding portion 45C.

[0112] Furthermore, as described above, since the first bent portion 45B is connected between both longitudinal ends of the first fabric holding portion 45C, the first annular end portion 31A held by the first fabric holding portion 45C is unlikely to fall off from the first fabric holding portion 45C.

[0113] After the first looped end 31A of the first fabric 31 is passed through the first fabric retaining portion 45C, the bolts 13 of the inflator 12 are passed through the bolt insertion holes 49 of the mounting portion 43, securing the fabric bracket 40 and the inflator 12. Since the two bolt insertion holes 49 are formed so as to straddle the first curved portion 45B, after the inflator 12 is mounted on the fabric bracket 40, the first curved portion 45B of the first slit portion 45 is blocked by the inflator 12. This prevents the first looped end 31A of the first fabric 31 from falling off the fabric bracket 40 through the first curved portion 45B.

[0114] Furthermore, a convex portion 41A is formed around the first fabric holding portion 45C, protruding forward. The convex portion 41A creates a gap in front of the first fabric holding portion 45C. This prevents the first fabric 31 held by the first fabric holding portion 45C from being strongly pinched between the fabric bracket 40 and other components (e.g., the airbag 11).

[0115] Furthermore, recesses 47 are formed on both sides of the first fabric holding portion 45C in the first extension portion 41. Forming the recesses 47 in this manner creates a gap behind the first fabric holding portion 45C. This prevents the first fabric 31 held by the first fabric holding portion 45C from being strongly pinched between the fabric bracket 40 and other components (e.g., the first side wall portion 23A).

[0116] Furthermore, the fabric bracket 40 has a second slit portion 46 formed from the mounting portion 43 to the second extending portion 42. Specifically, the second slit portion 46 includes a second opening 46A, a second curved portion 46B, and a second fabric holding portion 46C.

[0117] The second opening 46A is a slit region formed from the second end 40B toward the first end 40A of the mounting portion 43 .

[0118] The second bent portion 46B is a slit region extending from the end portion of the second opening 46A opposite to the second end portion 40B toward the second extending portion 42 .

[0119] The second fabric holding portion 46C is a slit region that is connected to the second curved portion 46B and extends along the longitudinal direction of the second extending portion 42 .

[0120] Furthermore, the second bent portion 46B is connected to the second fabric holding portion 46C between both ends in the longitudinal direction of the second fabric holding portion 46C.

[0121] When the second fabric 32 is mounted on the fabric bracket 40, the second loop end portion 32A of the second fabric 32 is passed through the second opening 46A and the second curved portion 46B and then through the second fabric holding portion 46C. Figure 16 As shown, the second loop end portion 32A of the second fabric 32 is held by the second fabric holding portion 46C.

[0122] Furthermore, as described above, since the second bent portion 46B is connected between both longitudinal ends of the second fabric holding portion 46C, the second annular end portion 32A held by the second fabric holding portion 46C is unlikely to fall off from the second fabric holding portion 46C.

[0123] Protrusions 48 are formed on both sides of the second fabric holding portion 46C in the second extension portion 42. Forming the protrusions 48 in this manner creates a gap in front of the second fabric holding portion 46C. This prevents the second fabric 32 held by the second fabric holding portion 46C from being strongly pinched between the fabric bracket 40 and other components (e.g., the airbag 11).

[0124] Furthermore, the fabric bracket 40 has flanges 44 formed on the first extension portion 41, the mounting portion 43, and the second extension portion 42. The flanges 44 are shaped to project toward the airbag 11. Providing the flanges 44 on the fabric bracket 40 improves rigidity at locations where the first and second fabrics 31, 32 are stretched toward opposite sides. Consequently, the fabric bracket 40 improves the stability with which the first and second fabrics 31, 32 are held.

[0125] And, as Figure 2 、 Figure 6 and Figure 8 As shown, at least a portion of the fabric bracket 40 is mounted so as to overlap with the opening 28 formed in the base member 20 .

[0126] Specifically, a portion of the mounting portion 43 of the fabric bracket 40 and the second extending portion 42 are mounted so as to overlap with the opening 28 .

[0127] Alternatively, a nylon coating may be applied to the surface of the fabric bracket 40. In this manner, the sharp portions of the fabric bracket 40 are coated, thereby preventing the first fabric 31 and the second fabric 32 from being worn or damaged.

[0128] <Configuration of Base Member 20>

[0129] Next, the structure of the base member 20 will be described.

[0130] The base member 20 is composed of a plate-like member made of resin and serving as a substrate of the side airbag device 1. Figure 2 As shown, it is used to accommodate the airbag module 10 .

[0131] like Figure 12 As shown, the base member 20 includes a base member main body 20A forming a concave airbag accommodating portion 21 for accommodating the airbag module 10 , and a downward protrusion 20B protruding downward from the base member main body 20A.

[0132] The main body 20A of the base member includes a front portion 20Aa and an airbag storage portion 21 as main components. The front portion 20Aa is located on the outside in the seat width direction relative to a hanging groove 20Ab provided in the approximately center portion in the seat width direction; the airbag storage portion 21 is provided further on the inside in the seat width direction than the hanging groove 20Ab.

[0133] The front portion 20Aa is provided at a position continuous with the front surface of the seatback S1 of the seat S. Furthermore, after the airbag module 10 is housed in the airbag storage portion 21, a pad 72 is provided in front of the airbag module 10. Furthermore, the pad 72 and the front portion 20Aa are covered with a skin material 71.

[0134] As described above, a vertically extending hanging groove 20Ab is formed at the boundary between the front portion 20Aa and the airbag storage portion 21. A plurality of surface hanging slits 27 are formed at regular intervals within the hanging groove 20Ab. In other words, the surface hanging slits 27 are formed in the area of the base member 20 adjacent to the airbag storage portion 21.

[0135] Furthermore, the end portion of the skin material 71 is passed through the skin hanging slit 27 , so that the skin material 71 can be hung and fixed.

[0136] Furthermore, after passing through the skin hanging slit 27 , the end of the skin material 71 is pulled toward the side opposite to the side forming the airbag storage portion 21 for storing the airbag module 10 (ie, outward in the seat width direction from the skin hanging slit 27 ) and fixed.

[0137] Next, the structure of the airbag storage portion 21 will be described in detail.

[0138] The airbag storage portion 21 is formed as a portion recessed further toward the rear of the seat than the front portion 20Aa and having a substantially U-shaped cross section. Specifically, the airbag storage portion 21 includes a bottom portion 22 serving as a wall portion behind the seat and side walls 23 extending from the left and right sides of the bottom portion 22 toward the front of the seat.

[0139] Furthermore, the side wall portion 23 provided on the inner side in the seat width direction is a first side wall portion 23A, and the side wall portion 23 provided on the outer side in the seat width direction is a second side wall portion 23B.

[0140] A first through-hole 24 is formed in the bottom portion 22. The first through-hole 24 is a circular hole, and a flange 25 is formed around the first through-hole 24, protruding rearward. Specifically, an inner peripheral surface 25A of the flange 25 is formed to be continuous with the first through-hole 24. Furthermore, the flange 25 is inserted through a second through-hole 52 of a retainer member 50, described later. As a result, the first through-hole 24 of the base member 20 and the second through-hole 52 of the retainer member 50 are arranged in opposing positions (specifically, overlapping positions).

[0141] like Figure 4 As shown, the wiring harness 14 connected to the inflator 12 passes through the first through-hole 24 and the second through-hole 52. In this way, the wiring harness 14 of the airbag module 10 arranged in front of the base member 20 can be passed through the rear side of the base member 20 and the retainer member 50 without being detoured to the outside of the base member 20.

[0142] Here, the position of the first through hole 24 will be described. Figure 7 As shown, the first through-hole 24 is provided above the upper end 12A of the inflator 12 .

[0143] In addition, Figure 7 , it is shown that the inflator 12 is removed from the side airbag device 1 and the inflator 12 is aligned with the mounting position in the vertical direction.

[0144] Furthermore, the first through-hole 24 is provided above the opening 28 in the up-down direction.

[0145] Furthermore, the first through-hole 24 is provided at a position vertically parallel to the boss portion 26 in the vertical direction. Specifically, the first through-hole 24 is provided below the boss portion 26 .

[0146] In addition, if Figure 2 As shown, the first through-hole 24 is provided at a position closer to the seat S in the seat width direction than the break portion 70 to which the front ends of the first and second fabrics 31 and 32 are attached.

[0147] Furthermore, an opening 28 is formed in the base member 20 from the bottom 22 to the first side wall 23A. Specifically, the opening 28 is formed by die-cutting a portion of the bottom 22 and a portion of the first side wall 23A. Forming a continuous opening 28 in the bottom 22 and the first side wall 23A facilitates die-cutting because the die-cutting direction is multiple, compared to a case where an opening is formed in either the bottom 22 or the first side wall 23A.

[0148] The opening portion 28 is formed below the first through-hole 24 at a position where the opening portion 28 and the first through-hole 24 at least partially overlap in the seat width direction.

[0149] Furthermore, at least a portion of the fabric bracket 40 is disposed relative to the opening 28 .

[0150] Specifically, if Figure 2 As shown, the second extension portion 42 and the mounting portion 43 of the fabric bracket 40 are arranged at positions overlapping with the opening 28 .

[0151] like Figure 8 As shown, the mounting portion 43 of the fabric bracket 40 is arranged in contact with the first side wall portion 23A, which is the inner surface of the airbag storage portion 21. The upper end 28A of the opening 28 is formed into a semicircular shape so that the bolt 13 can pass through it.

[0152] In addition, if Figure 2 As shown, the side wall front end 23Aa, which is the top end of the first side wall 23A, is bent into a U-shape. Furthermore, the outer end 41B of the first extension 41 of the fabric bracket 40, located on the outside in the seat width direction, is arranged so as to wrap around the side wall front end 23Aa.

[0153] A hub portion 26 protruding rearward is provided above the first through hole 24 in the airbag storage portion 21. The hub portion 26 is formed in a hollow columnar shape and passes through the hub insertion through hole 53 of the retainer member 50.

[0154] Furthermore, bolt insertion holes 29 are formed above the hub portion 26 of the airbag housing 21. Bolts 15 provided at the upper end of the airbag module 10 are inserted through these bolt insertion holes 29. Furthermore, bolt insertion holes 29 are provided at positions opposing the upper through-holes 58 of the retainer member 50. The airbag module 10, base member 20, and upper portions of the retainer member 50 are each fastened together by bolts 15.

[0155] A lower protrusion 20B is provided below the front portion 20Aa. A through-hole 20Ba is formed in the lower protrusion 20B. The base member 20 and the retainer member 50 are fixed by passing a bolt through the through-hole 20Ba of the base member 20 and the first fastening portion 61 of the retainer member 50 and fastening them.

[0156] More specifically, the downward protruding portion 20B of the base member 20 and the retainer mounting portion 60 of the retainer member 50 are fixed.

[0157] <Configuration of the Retainer Member 50>

[0158] Next, the structure of the retainer member 50 will be described.

[0159] The retainer member 50 is a metal holding member that holds the airbag storage portion 21 of the base member 20 from the rear side of the vehicle body.

[0160] like Figure 5 and Figure 10 As shown, the retainer member 50 includes a retainer main body 51 that holds the airbag housing portion 21 and a retainer mounting portion 60 provided below the retainer main body 51 .

[0161] The retainer main body 51 has a substantially U-shaped cross section. Specifically, the retainer main body 51 includes a retainer rear wall 51A disposed opposite the bottom 22 of the airbag storage portion 21, and first and second retainer side walls 51B and 51C extending forward of the seat from opposite ends of the retainer rear wall 51A in the vehicle body width direction.

[0162] The retainer rear wall portion 51A is formed with a third fastening portion 57 , a boss insertion through-hole 53 , a second through-hole 52 , and a flange portion 56 in this order from top to bottom.

[0163] The third fastening portion 57 is a hole formed at a position facing the bolt insertion hole 29 of the base member 20 , and is fastened using the bolt 15 .

[0164] The through hole 53 for inserting the hub portion is a hole through which the hub portion 26 of the base member 20 is inserted. Figure 7 As shown, the through hole 53 for inserting the hub portion is formed to have a size slightly larger than the cross section of the hub portion 26 .

[0165] The second through hole 52 is a hole formed at a position opposite to the first through hole 24 and the flange 25 of the base member 20. Figure 7 As shown, the second through hole 52 is formed to have a size slightly larger than the cross section of the flange 25 .

[0166] Furthermore, the harness 14 of the airbag module 10 passes through the second through-hole 52 and the first through-hole 24 from the front side to the rear side of the side airbag device 1 .

[0167] The second through hole 52 and the boss insertion through hole 53 are formed vertically side by side. In other words, the second through hole 52 and the boss insertion through hole 53 are arranged at positions where they at least partially overlap in the seat width direction.

[0168] In addition, in the retainer rear wall portion 51A, a flange portion 56 extending in the vertical direction is formed below the second through hole 52. The flange portion 56 is a portion processed into a convex shape at the rear of the seat. Figure 7 As shown, the flange portion 56 is provided at a position that vertically overlaps with the inflator 12 mounted on the airbag storage portion 21 .

[0169] Furthermore, the first guard-ring side wall portion 51B of the guard-ring main body portion 51 constitutes an outer wall portion in the seat width direction, and the second guard-ring side wall portion 51C constitutes an inner wall portion in the seat width direction.

[0170] In addition, if Figure 5 、 Figure 7 and Figure 10 As shown, a plurality of recesses 55 are formed in parallel in the vertical direction at the corner connecting the retainer rear wall portion 51A and the first retainer side wall portion 51B. The recesses 55 are recessed toward the front of the seat.

[0171] Similarly, a plurality of recessed portions 55 are formed at a corner portion connecting the retainer rear wall portion 51A and the second retainer side wall portion 51C.

[0172] By forming the recess 55 as described above, the first and second retainer side walls 51B and 51C can be prevented from deforming relative to the retainer rear wall 51A. This prevents the first and second retainer side walls 51B and 51C from expanding leftward and rightward relative to the retainer rear wall 51A.

[0173] In addition, if Figure 5 、 Figure 7 and Figure 10 As shown, a harness mounting portion 54 for holding metal fittings mounted on the wire harness 14 is provided on the first guard side wall portion 51B.

[0174] The harness mounting portion 54 may be an opening, or may include a metal part mounted in the opening.

[0175] Furthermore, the harness mounting portion 54 is provided at a position higher in the vertical direction than the second through-hole 52. Specifically, the harness mounting portion 54 is provided at substantially the same height as the boss insertion through-hole 53 in the vertical direction.

[0176] Furthermore, since the harness mounting portion 54 is provided at a higher position than the second through-hole 52 , the harness 14 passing through the second through-hole 52 is held in a state of being bent upward.

[0177] A retainer mounting portion 60 extending downward is provided at the lower end portion 59 of the retainer main body 51. In this embodiment, the retainer mounting portion 60 is joined to the lower end portion 59 by welding, but this is not limiting. For example, the retainer main body 51 and the retainer mounting portion 60 may be joined using fasteners such as bolts and nuts, or the retainer main body 51 and the retainer mounting portion 60 may be integrally formed.

[0178] The retainer mounting portion 60 is a metal plate-shaped member that extends downward while being bent from the inner side to the outer side in the seat width direction.

[0179] like Figure 10 As shown, the retainer mounting portion 60 includes a main surface portion 60A constituting a surface and side surface portions 60B formed by bending both ends of the main surface portion 60A. In other words, the side surface portions 60B are walls that stand vertically from both ends of the main surface portion 60A.

[0180] The main surface portion 60A is formed to narrow from top to bottom, and a circumferential flange portion 63 is provided at a position substantially in the vertical center surrounding the first fastening portion 61. The circumferential flange portion 63 is formed in a convex shape that slightly protrudes toward the front of the seat.

[0181] A curved portion 64 is formed near the lower end of the retainer mounting portion 60, extending across the circumferential flange portion 63. Specifically, the retainer mounting portion 60 curves toward the front of the seat at the curved portion 64. The curved portion 64 is formed to slope downward from the inner side toward the outer side in the seat width direction.

[0182] Furthermore, near the lower end of the main surface portion 60A, a first fastening portion 61 and a second fastening portion 62 are formed. Specifically, the first fastening portion 61 and the second fastening portion 62 are provided below a curved portion 60Aa of the main surface portion 60A that curves in the seat width direction.

[0183] The first fastening portion 61 is a hole provided at a position opposite to the through-hole 20Ba of the lower protruding portion 20B of the base member 20. Specifically, the retainer member 50 (retainer mounting portion 60) and the base member 20 are fixed by inserting a bolt through the first fastening portion 61 and the through-hole 20Ba and fastening it with a nut.

[0184] Furthermore, the first fastening portion 61 is formed inside the circumferential flange portion 63 and above the bent portion 64 .

[0185] Furthermore, the second fastening portion 62 is formed below the circumferential flange portion 63 in the main surface portion 60A.

[0186] The second fastening portion 62 is a portion fastened to the vehicle body B (e.g., the seat frame of the seat S or the fender lining). Specifically, the second fastening portion 62 is a through-hole formed in the retainer mounting portion 60. Bolts are passed through the second fastening portion 62 to fasten the retainer mounting portion 60 to the vehicle body B, thereby securing the retainer member 50 (retainer mounting portion 60) to the vehicle body B.

[0187] As described above, the first fastening portion 61 and the second fastening portion 62 are provided together at positions spaced apart from each other near the lower end portion of the retainer member 50 .

[0188] Furthermore, since the first fastening portion 61 is provided above the bent portion 64 and the second fastening portion 62 is provided below the bent portion 64 , the fastening operations of the first fastening portion 61 and the second fastening portion 62 can be performed at different angles.

[0189] Furthermore, since the first fastening portion 61 is formed inside the circumferential flange portion 63 , the mounting rigidity of the retainer member 50 and the base member 20 can be improved.

[0190] In addition, if Figure 11 As shown, a folded portion 60Ba is formed at the lower end of the retainer mounting portion 60, at the upper end of the side portion 60B. The folded portion 60Ba is formed by folding the upper end of the side portion 60B downward, thereby increasing the rigidity of the side portion 60B. This improves the rigidity of the retainer member 50 when attached to the vehicle body B.

[0191] Summary

[0192] The main features of the side airbag device 1 according to the present embodiment described above are as follows.

[0193] [1] A side airbag device 1 is installed between the vehicle body B and the seat S. The side airbag device 1 includes an airbag module 10, a base member 20, a fabric 30, and a fabric bracket 40. The airbag module 10 includes an airbag 11 that can be deployed and an inflator 12 that supplies gas to the interior of the airbag 11. The base member 20 includes a concave airbag storage portion 21 that stores the airbag module 10 and is installed between the vehicle door D and the seat S. The fabric 30 guides the deployment of the airbag 11. The fabric bracket 40 is mounted so as to abut against the inner surface of the airbag storage portion 21.

[0194] According to the side airbag device 1, the fabric bracket 40 is attached to the airbag storage portion 21 of the base member 20. This allows the fabric bracket 40 to be arranged so as not to protrude outside the airbag storage portion 21. Therefore, the side airbag device 1 can be miniaturized.

[0195] [2] In the side airbag device 1 , the airbag storage portion 21 includes a bottom portion 22 and a side wall portion 23 extending forward from the bottom portion 22 . The fabric bracket 40 is attached to the side wall portion 23 of the airbag storage portion 21 while in contact with the side wall portion 23 .

[0196] In this manner, the fabric bracket 40 can be attached to the side wall portion 23 of the airbag storage portion 21. This shortens the distance between the fabric bracket 40 and the break portion 70 compared to attaching the fabric bracket 40 to the bottom portion 22 of the airbag storage portion 21. Consequently, the fabric 30 can be shortened.

[0197] [3] In the side airbag device 1, the fabric bracket 40 includes a mounting portion 43 mounted on the side wall portion 23 of the airbag storage portion 21 and a first extension portion 41 bent and extended from the mounting portion 43. The first extension portion 41 includes a first fabric holding portion 45C that holds the first fabric 31.

[0198] In the side airbag device 1, the attachment portion 43 attached to the airbag storage portion 21 is bent and connected to the first extension portion 41 attached to the first fabric 31. Therefore, by stretching the first fabric 31, the fabric bracket 40 can be further prevented from falling off the base member 20.

[0199] [4] In the side airbag device 1 , the fabric bracket 40 includes the convex portion 41A formed around the first fabric holding portion 45C and protruding forward.

[0200] In this manner, the first cloth holding portion 45C can be suppressed from coming into contact with the base member 20 . Consequently, the first cloth 31 can be suppressed from coming into contact with the base member 20 .

[0201] [5] In the side airbag device 1, the fabric bracket 40 includes a second extension portion 42 that is bent and extended from the mounting portion 43. The second extension portion 42 includes a second fabric holding portion 46C that holds the second fabric 32. The second extension portion 42 is connected to the opposite side of the first extension portion 41 relative to the mounting portion 43 and extends toward the opposite side of the first extension portion 41.

[0202] In this manner, the tensile forces of the first fabric 31 and the second fabric 32 can be offset. This can prevent the fabric bracket 40 from falling off from the base member 20 .

[0203] [6] In the side airbag device 1 , the fabric bracket 40 includes the flange portion 44 formed across the first extension portion 41 , the mounting portion 43 , and the second extension portion 42 .

[0204] This can improve the rigidity of the first extension portion 41, the mounting portion 43, and the second extension portion 42. Thus, in the fabric bracket 40, the rigidity of the portion to which the load is applied can be improved while suppressing an increase in weight.

[0205] [7] In the side airbag device 1, the fabric bracket 40 includes the first slit portion 45 formed from the first end portion 40A of the mounting portion 43 to the first extension portion 41. A portion of the first slit portion 45 serves as a first fabric holding portion 45C.

[0206] In this manner, it is possible to suppress the first web 31 from falling off from the first web holding portion 45C.

[0207] [8] In the side airbag device 1, the first extension portion 41 extends from the front end of the mounting portion 43 toward the vehicle door D, the first fabric holding portion 45C is arranged in front of the base member 20, and the first fabric 31 extends forward from the first fabric holding portion 45C.

[0208] Thus, the distance from the first fabric holding portion 45C to the breaking portion 70 is shortened. As a result, the first fabric 31 can be shortened.

[0209] [9] In the side airbag device 1, at least a portion of the first fabric holding portion 45C is arranged further outward in the seat width direction than the side wall portion front end 23Aa, which is the front end of the side wall portion 23 of the airbag storage portion 21.

[0210] In this manner, when the airbag 11 is deployed, the airbag 11 can be prevented from contacting the first fabric holding portion 45C.

[0211]

[10] In the side airbag device 1, the outer end portion 41B of the first extension portion 41 in the seat width direction is bent so as to wrap around the side wall portion front end 23Aa.

[0212] In this manner, it is possible to suppress displacement of the fabric bracket 40 when the airbag 11 is deployed.

[0213] <Other Implementation Methods>

[0214] The present invention is not limited to the above-described embodiment.

[0215] Figure 17 and Figure 18 FIG. 5 shows a retainer member 50A as a modified example of the retainer member 50. Figure 17 In FIG. 1 , the airbag 11 of the airbag module 10 is omitted.

[0216] like Figure 17 and Figure 18 As shown, the retainer member 50A is different from the retainer member 50 in that the retainer main body portion 51 and the retainer mounting portion 60 are integrally formed, and other contents are the same as the retainer member 50 .

[0217] Furthermore, the retainer member 50A may be formed of the same material (for example, metal) as the retainer body 51 of the retainer member 50 .

[0218] For example, in the above embodiment, the side airbag device 1 is installed in the rear seats of the vehicle. However, the side airbag device 1 may be installed in the front seats or the rear seats behind the second row of seats.

[0219] Furthermore, the side airbag device 1 is not limited to automobiles, but can also be applied to vehicles such as trains, buses, airplanes, and ships.

[0220] Explanation of symbols

[0221] B body

[0222] D door

[0223] S seat

[0224] S1 seat back

[0225] 1 side airbag device

[0226] 10 Airbag module

[0227] 11 Airbags

[0228] 12 Inflator

[0229] 12A upper end

[0230] 13 bolts

[0231] 14 Wiring Harness

[0232] 15 bolts

[0233] 16 nuts

[0234] 20 base parts

[0235] 20A Base unit main body

[0236] 20Aa front

[0237] 20Ab hanging groove

[0238] 20B lower protrusion

[0239] 20Ba through hole

[0240] 21 Airbag storage area

[0241] 22 bottom

[0242] 23 side wall

[0243] 23A first side wall portion

[0244] 23Aa side wall front end

[0245] 23B second side wall portion

[0246] 24 1st through hole

[0247] 25 flange

[0248] 25A inner surface

[0249] 26 Hub

[0250] 27 Slits for skin suspension

[0251] 28 opening

[0252] 28A Upper end of opening

[0253] 29 Bolt insertion hole

[0254] 30 fabrics

[0255] 31st Fabric

[0256] 31A 1st ring end (rear end)

[0257] 31B 1st ring sewing part

[0258] 31C 1st suture part (front end)

[0259] 32nd fabric

[0260] 32A 2nd ring end (rear end)

[0261] 32B second ring sewing part

[0262] 32C 2nd suture part (front end)

[0263] 40 fabric brackets

[0264] 40A 1st end

[0265] 40B second end

[0266] 41 1st extension

[0267] 41A convex part

[0268] 41B outer end

[0269] 42 2nd extension

[0270] 43 Installation Department

[0271] 44 flange

[0272] 45 1st slit

[0273] 45A 1st opening

[0274] 45B 1st bend

[0275] 45C 1st fabric holding part

[0276] 46 Second slit

[0277] 46A Second opening

[0278] 46B second bend

[0279] 46C second fabric holding portion

[0280] 47 recess

[0281] 48 convex part

[0282] 49 Bolt insertion hole

[0283] 50 retainer parts

[0284] 50A retainer assembly

[0285] 51 Retainer body

[0286] 51A Retainer rear wall

[0287] 51B 1st retainer side wall (retainer side wall)

[0288] 51C 2nd retainer side wall (retainer side wall)

[0289] 51Ca bolt insertion hole

[0290] 52 2nd through hole

[0291] 53 Through hole for inserting hub

[0292] 54 Wire harness installation section

[0293] 55 recess

[0294] 56 flange

[0295] 57 3rd fastening part

[0296] 58 Upper through hole

[0297] 59 Lower end of the main body

[0298] 60 retainer installation part

[0299] 60A main face

[0300] 60Aa bend

[0301] 60B side face

[0302] 60Ba fold back

[0303] 61 1st fastening part

[0304] 62 second fastening part

[0305] 63 Circumferential flange

[0306] 64 bend

[0307] 70 fracture

[0308] 71 Surface material

[0309] 72 pads

Claims

1. A side airbag device disposed between a vehicle body and a seat, characterized in that: It has an airbag module, a base component, fabric and a fabric bracket; The airbag module includes an airbag capable of being deployed and an inflator for supplying gas into the interior of the airbag; The base member has a concave airbag receiving portion for receiving the airbag module and is installed between the vehicle door and the seat; The fabric guides deployment of the airbag; The fabric bracket is used to mount the fabric; The fabric bracket has a mounting portion, a first extension portion, and a second extension portion; The mounting portion abuts against and is mounted on the inner surface of the airbag storage portion; The first extension portion is bent and extended from the mounting portion; The second extension portion extends relative to the mounting portion toward the opposite side of the first extension portion; The first extension portion has a first fabric holding portion for holding the first fabric; The second extension portion includes a second fabric holding portion that holds the second fabric.

2. The side airbag device according to claim 1, characterized in that: The fabric bracket includes a convex portion formed around the first fabric holding portion and protruding toward the front of the vehicle body.

3. The side airbag device according to claim 1 or 2, characterized in that: The fabric bracket includes a flange portion formed across the first extension portion, the mounting portion, and the second extension portion.

4. The side airbag device according to claim 1 or 2, characterized in that: The fabric bracket includes a first slit portion formed from a first end portion of the mounting portion to the first extending portion; the first fabric passes through the first slit portion and is held by the first fabric holding portion.

5. The side airbag device according to claim 1 or 2, characterized in that: The first extension portion extends from a front end of the mounting portion on the front side of the vehicle body toward the vehicle door located on the outer side in the vehicle body width direction; The first fabric holding portion is arranged on the vehicle body front of the base member; The first fabric extends from the first fabric holding portion toward the front of the vehicle body.

6. The side airbag device according to claim 5, characterized in that: At least a portion of the fabric holding portion is arranged outward in the vehicle body width direction relative to a front end of a side wall portion of the airbag accommodating portion, which is a front end on the vehicle body front side.

7. The side airbag device according to claim 6, characterized in that: An outer end portion of the first extension portion on the outer side in the vehicle body width direction is bent so as to wrap around the front end of the side wall portion.

Images