JP7315431B2 - side airbag device - Google Patents

Description

The present invention relates to a side airbag device.

A known side airbag device includes an airbag, an inflator that supplies gas to the airbag, and a base member that houses the airbag and the inflator and is fixed to a vehicle body (Patent Document 1). In this technique, the base member comprises a wire frame made of metal bars. A bridge portion connecting the lower edge portion of the outer wire frame and the lower edge portion of the inner wire frame of the wire frame is positioned below the airbag module and behind the center of the main body of the inflator.

JP 2019-085035 A

By the way, in the side airbag device, it is desired that the rigidity of the frame can be improved and the structure can be made compact. In some cases, it is desired that the left and right frames do not expand laterally when the airbag is deployed.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a side airbag device that can improve the rigidity of the frame and that can have a compact configuration in the front-rear direction.
Another object of the present invention is to prevent the left and right frames from being deformed so as to widen to the left and right when the airbag is deployed.
Another object of the present invention is to reduce the man-hours for manufacturing the frame.
Another object of the present invention is to improve the appearance of the side airbag device.

In order to achieve the above object, a side airbag device is a side airbag device comprising: an airbag module having an airbag and an inflator for supplying gas into the airbag; and a case for accommodating the airbag module, wherein the case comprises a frame, a pad covering the frame, and a skin member covering the frame and the pad, the frame comprising a first frame portion positioned on one of the left and right sides of the airbag module, a second frame portion positioned on the other left and right side of the airbag module, and the airbag module. and a third frame portion connecting the first frame portion and the second frame portion, the third frame portion being located behind the front end of the airbag and in front of the rear end of the inflator.

According to such a configuration, the frame has the third frame portion that connects the lower portions of the first frame portion and the second frame portion, so that the rigidity of the frame can be improved. Further, since the third frame portion is arranged behind the front end of the airbag and in front of the rear end of the inflator, the side airbag device can be made compact in the front-rear direction. Further, since the portions near the front side of the first frame portion and the second frame portion can be connected by the third frame portion, it is possible to suppress the deformation of the first frame portion and the second frame portion so as to expand to the left and right when the airbag is deployed.

In the side airbag device described above, the third frame portion may be arranged in front of the center axis of the inflator.

According to this, since the front side of the first frame portion and the second frame portion can be connected by the third frame portion, it is possible to further suppress deformation of the first frame portion and the second frame portion so as to expand to the left and right when the airbag is deployed.

In the above-described side airbag device, the frame may have a fourth frame portion located above the airbag module and in front of the central axis of the inflator and connecting the first frame portion and the second frame portion.

According to this, since the fourth frame portion connecting the upper portions of the first frame portion and the second frame portion is provided, the rigidity of the frame can be further improved. In addition, the third frame portion and the fourth frame portion can further suppress deformation of the first frame portion and the second frame portion so as to expand to the left and right when the airbag is deployed.

In the above-described side airbag device, at least one of the first frame portion and the second frame portion may have a first plate-shaped portion, the first plate-shaped portion may have a reinforcing convex portion projecting in one of the left and right directions, and the third frame portion may be connected to the first plate-shaped portion behind the reinforcing convex portion.

According to this, the third frame portion is connected near the portion of the first plate-like portion having high rigidity, so that the rigidity of the frame can be further improved.

In the side airbag device described above, the frame may have a first wire frame made of a metal rod, and the first wire frame may have a wire side portion forming the first frame portion, and a wire lower portion bending from a lower end of the wire side portion and extending left and right to form the third frame portion.

According to this, since it is not necessary to connect the first frame portion and the third frame portion by welding or the like, the number of man-hours for manufacturing the frames can be reduced.

In the above-described side airbag device, the frame may have a plate-like frame made of a metal plate, the plate-like frame having a side plate portion forming the second frame portion, and a lower plate portion bending from a lower end of the side plate portion to extend left and right to form the third frame portion, and the wire lower portion may be bonded to the lower surface of the lower plate portion.

According to this, the third frame portion can be composed of the wire lower portion of the first wire frame and the lower plate portion of the plate-shaped frame, so that the rigidity of the third frame portion can be improved. Thereby, the rigidity of the frame can be further improved.

The side airbag device may include a harness disposed in the case and having one end connected to the inflator, and the third frame portion may be arranged between a first straight line along the longitudinal direction of the inflator passing through the front end of the harness and a second straight line along the longitudinal direction of the inflator passing through the rear end of the harness when viewed from the left-right direction.

The above-described side airbag device may be fixed to a vehicle body and arranged between the vehicle body and the seat so that the surface on the side of the seat is exposed when the seat is moved.

In the side airbag device described above, the frame may have a second plate-like portion that retains the shape of the side airbag device on the side of the seat.

According to this, the minute shape which is difficult to be retained by the frame made of the metal rod can be retained by the second plate-like portion, so that the shape of the seat side of the side airbag device can be clearly displayed. As a result, the appearance of the side airbag device can be improved.

In the above-described side airbag device, at least one of the first frame portion and the second frame portion may have a third plate-shaped portion, and the third plate-shaped portion may have a lower end projection portion projecting downward from the lower end portion of the third plate-shaped portion, and the third frame portion may be connected to the lower end portion of the third plate-shaped portion behind the lower end projection portion.

According to the present invention, the rigidity of the frame can be improved, and the side airbag device can be made compact in the front-rear direction. In addition, it is possible to prevent the first frame portion and the second frame portion from being deformed so as to expand to the left and right when the airbag is deployed.

Further, by arranging the third frame portion in front of the central axis of the inflator, it is possible to further suppress the deformation of the first frame portion and the second frame portion so as to expand to the left and right when the airbag is deployed.

Further, since the frame has the fourth frame portion, the rigidity of the frame can be further improved. In addition, it is possible to further suppress deformation of the first frame portion and the second frame portion so as to expand to the left and right when the airbag is deployed.

Further, by connecting the third frame portion to the first plate-like portion behind the reinforcing convex portion of the first plate-like portion, the rigidity of the frame can be further improved.

Moreover, since the first wire frame has the wire side portion and the wire lower portion, the number of man-hours for manufacturing the frame can be reduced.

Further, by joining the wire lower portion to the lower surface of the lower plate portion of the plate-shaped frame, the rigidity of the frame can be further improved.

In addition, the appearance of the side airbag device can be improved by the frame having the second plate-like portion.

It is the figure which looked at the vehicle provided with the side airbag apparatus from the vehicle interior. It is the figure (a) which looked at the side panel of the vehicle body from the vehicle interior inside, and the figure (b) which looked at the striker and the base bracket from the top. 1 is an exploded perspective view of a side airbag device; FIG. It is the figure which looked at the airbag module, the 1st bracket, and the base member from the right-and-left outside. It is the perspective view which looked at the pad from the left-right outer side. It is a cross-sectional view (a) of the side airbag device passing through the upper part of the webbing, and an enlarged view (b) showing a burr of the bracket. It is an enlarged cross-sectional view of the vicinity of the protrusion of the pad. It is an exploded perspective view of webbing. FIG. 4 is a cross-sectional view of the side airbag device passing through the loop portion of the webbing; Fig. 2 is a perspective view of a first attachment wire, a second attachment wire and a fixed wire; It is the figure which looked at the 1st attachment wire, the 2nd attachment wire, and the fixed wire from the right-and-left outside. FIG. 11 is a transverse cross-sectional view of a second posture in which the first bracket is rotated outward by a predetermined angle around the front end from the first posture in which the first bracket is fixed to the case; It is the figure which looked at the side airbag device from the right-and-left outside. FIG. 4 is a rear view of the airbag module, first bracket, second bracket, harness and connector; It is the figure which looked at the 1st bracket, the 2nd bracket, harness, and a connector from the top. It is a perspective view of a side airbag device, the figure (a) which shows the state which closed the wire fastener, and the figure (b) which shows the state before closing a wire fastener. FIG. 3 is a perspective view of a striker, first skin member, plate member, second skin member, and cloth-like member; FIG. 2 is an exploded perspective view of the side airbag device as viewed from the left and right outer sides; It is a longitudinal cross-sectional view of a pad and a 1st cover part which passes through a slit hole.

Next, an embodiment of the invention will be described in detail with reference to the drawings as appropriate.
As shown in FIG. 1, the side airbag device 1 of this embodiment is applied to a rear seat of an automobile as a vehicle, and is arranged between a seat S and a side wall BS of the vehicle body. Specifically, the seat S has a seat cushion S1 and a seat back S2, and the side airbag device 1 is arranged between the seat back S2 and the side wall BS.

The seat back S2 is provided so as to be rotatable forward and backward about its lower end portion so that it can be tilted forward. On the other hand, the side airbag device 1 is fixed to the side wall BS of the vehicle body, and is not fixed to the seatback S2. Therefore, when the seat S is moved, specifically, when the seat back S2 is tilted forward, the side airbag device 1 is exposed while remaining on the side wall BS. In the side airbag device 1, when the seat back S2 is tilted forward, the inner surface 1S (see FIG. 16A), which is the surface on the side of the seat S, is exposed. When the seatback S2 is in the upright state shown in FIG. 1, the front surface of the side airbag device 1 is substantially flush with the front surface of the seatback S2. Therefore, when the seat S is normally used, the side airbag device 1 looks like a part of the seat back S2.

In this embodiment, the side airbag device 1 arranged on the left side of the vehicle body (the left side of the seat S) will be described, but a side airbag device having a substantially symmetrical configuration can also be provided on the right side of the vehicle body. In this embodiment, unless otherwise specified, the inner side and the outer side in the left-right direction are based on the vehicle body rather than the side airbag device 1 itself. That is, the side closer to the lateral center of the vehicle body is the inner side, and the side farther from the lateral center of the vehicle body is the outer side. When viewed from the side airbag device 1, the left and right inner sides correspond to the "seat S side", and the left and right outer sides correspond to the "vehicle body side". In addition, front and rear and up and down are based on the seat S unless otherwise specified.

In the side airbag device 1 shown in FIG. 1, a tearing portion 1C is vertically elongated on the front surface to be torn and spread when the airbag 11 (see FIG. 6A) is deployed.

As shown in FIG. 2( a ), the vehicle body has side panels 300 . The side panel 300 is made of metal and has a side wall portion 310 forming a side wall BS, a wheel house 320 projecting left and right inward from the side wall portion 310, and a striker mounting portion 330. As shown in FIG.

The wheel house 320 is a part in which the tire T is accommodated. An airbag mounting bracket 340 is fixed by welding or the like at a position corresponding to the upper portion of the tire T of the wheel house 320 . The airbag mounting bracket 340 is a member for mounting the side airbag device 1 to the vehicle body, and is made of a metal plate. As shown in FIG. 3, the airbag mounting bracket 340 has holes 341 through which bolts 93B for fixing the side airbag device 1 are inserted. Nuts 93N are fixed to the left and right outer surfaces of the airbag mounting bracket 340 by welding.

Returning to FIG. 2A, the striker mounting portion 330 is a portion that secures a mounting surface for the striker 350, and is fixed to the upper portion of the side panel 300 by welding or the like. The striker 350 is a member for locking the seat back S2 of the seat S to the vehicle body in an upright state. As shown in FIG. 2(b), the striker 350 has a U-shape protruding left and right inside from the side panel 300 of the vehicle body, and is made of metal. Specifically, the striker 350 has a pair of first rod-shaped portions 351 protruding from the side panel 300 and a second rod-shaped portion 352 connecting the tips of the pair of first rod-shaped portions 351 to each other. The seat back S2 of the seat S has a latch mechanism (not shown) that can be engaged with the striker 350. When the seat back S2 is raised from the forward tilted state and the latch mechanism engages with the striker 350, the seat back S2 is locked in the upright state.

The striker 350 is fixed to the striker mounting portion 330 of the vehicle body via a base bracket 360 . Base bracket 360 is a member for fixing striker 350 to the vehicle body, and is made of a metal plate. As shown in FIG. 17, the base bracket 360 has a base portion 361 as a body portion of the base bracket 360, and bracket engagement portions 362 projecting from the base portion 361 to the left and right inner sides of the vehicle body.
The base portion 361 is attached to the striker mounting portion 330 of the vehicle body.

The bracket engaging portion 362 is formed by bending a part of the metal plate that constitutes the base bracket 360 to the left and right inner sides of the vehicle body. The airbag fixing portion 364 has a planar bracket engaging surface 364A with which a positioning portion 230 (see FIG. 5) of the second bracket 200, which will be described later, can be engaged. Also, the airbag fixing portion 364 has a hole 364B through which the bolt 92B (see FIG. 3) is inserted. Further, nuts 92N are fixed to the left and right outer surfaces of the airbag fixing portion 364 by welding.

The striker 350 is fixed to the base portion 361 by welding or the like. 2(a) and 2(b), the base bracket 360 is fixed to the striker mounting portion 330 of the vehicle body with a plurality of bolts 370. As shown in FIG.

As shown in FIG. 3, the side airbag device 1 includes an airbag module 10, a case 2, webbing 30, and a first bracket 100 as a second fixing bracket.

The airbag module 10 has an airbag 11 , an inflator 12 that supplies gas into the airbag 11 , and a retaining plate 13 that retains the inflator 12 . The inflator 12 has two projecting bolts 12B for fixing the inflator 12 to the first bracket 100 . The inflator 12 is fixed to the first bracket 100 at this bolt 12B. The holding plate 13 is made of a metal plate and arranged between the inflator 12 and the first bracket 100 . The holding plate 13 is fixed to the first bracket 100 together with the inflator 12 by bolts 12B. An upper end portion of the holding plate 13 is provided with a fixing hole 13A with which a first clip 440 (see FIG. 4) for fixing a harness 400, which will be described later, engages. The airbag 11 is folded around the inflator 12 so that it can be deployed by the gas pressure of the inflator 12 .

The case 2 accommodates the airbag module 10 by attaching the airbag module 10 therein. The case 2 includes a base member BA as a frame, a pad 70 covering the base member BA (see FIG. 6A), and a skin member 80 covering the base member BA and the pad 70 (see FIG. 6A).

The base member BA is a member fixed to the vehicle body, and includes a plate-shaped frame, a second bracket 200 as a first fixing bracket, and a wire frame 20 as a frame member.
The second bracket 200 constitutes the framework of the case 2 together with the wire frame 20 . The second bracket 200 is a plate-shaped member to which the first bracket 100 is attached and fixed, and is made of a metal plate. The second bracket 200 has a side plate portion 210 , a lower plate portion 220 , a positioning portion 230 and a notch portion 240 . In the present embodiment, the side plate portion 210 corresponds to a "first plate-like portion", a "second plate-like portion", and a "third plate-like portion".

The notch portion 240 is formed at the rear edge of the upper portion of the side plate portion 210 . The notch 240 is a portion through which the striker 350 passes.

The side plate portion 210 retains the shape of the left and right inner sides (the inner side surface 1S (see FIG. 16A)) of the side airbag device 1 . The side plate portion 210 has a first vehicle body fixing portion 270 and a second vehicle body fixing portion 250 as vehicle body fixing portions fixed to the vehicle body, a bracket fixing portion 260 , a bracket engaging hole 252 and an engaging hole 213 .
The first vehicle body fixing portion 270 is a portion fixed to the base bracket 360 attached to the vehicle body, and is provided above the side plate portion 210 , specifically, above the notch portion 240 . A fixing hole 271 used when fixing the side airbag device 1 to the vehicle body is formed in the first vehicle body fixing portion 270 .

The second vehicle body fixing portion 250 is a portion fixed to an airbag mounting bracket 340 attached to the vehicle body, and is provided below the side plate portion 210 . Therefore, the second vehicle body fixing portion 250 is arranged below the first vehicle body fixing portion 270 . In addition, the lower part of the side plate part 210 has an inclined part 210B that extends obliquely so as to be positioned on the left and right outer sides as it goes downward, and a lower end part 210C that extends downward from the lower end of the inclined part 210B. Therefore, the second vehicle body fixing portion 250 is positioned laterally outside the upper portion of the side plate portion 210 on which the first vehicle body fixing portion 270 is provided. A fixing hole 251 used when fixing the side airbag device 1 to the vehicle body is formed in the second vehicle body fixing portion 250 . The fixing hole 251 is a circular hole through which the bolt 93B passes. The second bracket 200 is fastened to a nut 93N fixed to the airbag mounting bracket 340 with a bolt 93B.

The bracket fixing portion 260 is a portion to which the first bracket 100 is fixed, and is provided in the vertical central portion of the side plate portion 210 , specifically, in a portion below the notch portion 240 . A hole 261 (see FIG. 18) is formed in the bracket fixing portion 260, and nuts 91N are fixed to the left and right inner surfaces thereof by welding.
The bracket engagement hole 252 is a hole used when fixing the first bracket 100 to the second bracket 200 . Specifically, the bracket engagement hole 252 is a rectangular hole with which the tongue portion 152 provided at the lower end of the first bracket 100 engages. The bracket engaging hole 252 is arranged below the fixing hole 251 .

The engagement hole 213 is formed below the bracket fixing portion 260 of the side plate portion 210 . The engaging hole 213 has a first edge portion 213A extending substantially vertically on its rear side, and a second edge portion 213B extending substantially frontward and rearward on its lower side.

In addition, the side plate portion 210 has a lower end projecting portion 216, a substantially L-shaped reinforcing convex portion 217, and a bent portion 218 at its lower end portion 210C.
The lower end projecting portion 216 is a portion that is provided at the front portion of the lower end portion 210C and projects downward from other portions of the lower end portion 210C.
Reinforcement protrusion 217 is a portion that protrudes in one of the left and right directions of second bracket 200, specifically, inward in the left and right direction, and is provided in a portion near the front of lower end portion 210C of second bracket 200 including lower end protrusion 216.
Bent portion 218 is provided at a portion of the outer peripheral portion of second bracket 200 , specifically at the front end portion of lower end portion 210</b>C of second bracket 200 . The bent portion 218 is bent to the left and right inner sides opposite to the left and right outer sides where the airbag module 10 is arranged.

The front edge of the side plate portion 210 is formed with a joint portion 214 projecting in a trapezoidal shape, and the upper edge of the side plate portion 210 is formed with two joint portions 215 projecting in a trapezoidal shape.

The lower plate portion 220 bends from the lower end of the lower end portion 210C of the side plate portion 210 and extends outward in the left and right direction. The lower plate portion 220 is provided behind the lower end projecting portion 216 and the reinforcing convex portion 217 .

The positioning portion 230 is a portion that can be engaged with the bracket engaging portion 362 of the base bracket 360, and protrudes from the side plate portion 210 as the main body portion of the second bracket 200 toward the left and right outer sides of the vehicle body. Specifically, the positioning portion 230 is provided by cutting and raising a portion of the second bracket 200 made of a metal plate to the left and right outer sides (see also FIG. 5). In this embodiment, the positioning portion 230 is provided at a position in front of the first vehicle body fixing portion 270 . Therefore, the second bracket 200 is fixed to the bracket engaging portion 362 at a position behind the positioning portion 230 . The second bracket 200 is fastened to a nut 92N fixed to the base bracket 360 with a bolt 92B. The second bracket 200 and the first bracket 100 are fastened together to the base bracket 360 by this bolt 92B.

As shown in FIG. 13 , the positioning portion 230 is arranged behind the airbag module 10 . The positioning portion 230 can abut against a bracket engagement surface 364A formed at the front end portion of the airbag fixing portion 364 of the base bracket 360 from the front.

Returning to FIG. 3, the wire frame 20 is made of metal wires (metal bars). Wire frame 20 is fixed to second bracket 200 by being joined to second bracket 200 by welding. In addition, in the figure, a joint portion by welding is indicated by dot hatching.
The wire frame 20 has a first wire 21, a second wire 22, a third wire 23, and a fourth wire 24 as a first wire frame, and is configured by joining these four wires 21 to 24 by welding. In this embodiment, the wire frame 20 is made up of four wires 21 to 24, but the number of wires that make up the wire frame 20 is arbitrary.

The first wire 21 defines the external shape of the case 2 together with the third wire 23 . The first wire 21 has a first wire side portion 21A as a wire side portion formed along the left and right outer contours of the front, upper and lower portions of the side airbag device 1, and a first wire lower portion 21B as a wire lower portion extending left and right inward by bending from the lower end of the first wire side portion 21A. The first wire side portion 21A has a front frame portion 21D as a first extending portion that extends substantially vertically along the longitudinal direction of the inflator 12 (hereinafter also simply referred to as the “longitudinal direction”), an upper frame portion 21E that bends rearward from the upper end of the front frame portion 21D and extends substantially forward and backward, and a lower frame portion 21F that bends rearward from the lower end of the front frame portion 21D and extends substantially forward and backward. The first wire lower portion 21B extends left and right inward from the rear end of the lower frame portion 21F. The first wire lower portion 21B is joined to the lower surface of the lower plate portion 220 of the second bracket 200 .

The third wire 23 has a second wire side portion 23A formed along the left and right inner contours of the front and upper portions of the side airbag device 1, a connecting portion 23B extending left and right from the upper end of the second wire side portion 23A, and a second wire lower portion 23C extending rearward from the lower end of the second wire side portion 23A. The left and right outer ends of the connecting portion 23B bend and extend forward, and the forwardly extending portion is joined to the upper end portion of the first wire side portion 21A of the first wire 21 . The second wire lower portion 23C is joined to the second bracket 200. As shown in FIG. Also, the second wire side portion 23A is joined to the distal end portions of the joint portions 214 and 215 of the second bracket 200 .

The fourth wire 24 has one end joined to the first wire side portion 21A of the first wire 21 and the other end joined to the second wire side portion 23A of the third wire 23, thereby connecting the first wire 21 and the third wire 23.

The second wire 22 has an extending portion 22A, a connecting portion 22B extending left and right from the upper end of the extending portion 22A, and a connecting portion 22C extending rearward from the left and right inner ends of the connecting portion 22B. As shown in FIG. 4, the extension portion 22A has a front extension portion 22D as a second extension portion that extends substantially vertically along the front frame portion 21D of the first wire 21, and an upper extension portion 22E that bends backward from the upper end of the front extension portion 22D and extends substantially forward and backward along the upper frame portion 21E. In addition, the extension portion 22A has a plurality of skin attachment portions 22F and bent convex portions 22G.

The skin attachment portion 22F is a portion that can be engaged with a hook 81 provided on the skin member 80 (see FIG. 6A).
The bent convex portion 22G is a portion that is bent so as to protrude forward, and is formed above the front extending portion 22D. The bent convex portion 22G is formed between two adjacent skin attachment portions 22F of the front extension portion 22D, specifically, between the skin attachment portion 22F positioned at the uppermost position of the front extension portion 22D and the skin attachment portion 22F positioned adjacent thereto below.

The second wire 22 has a connection portion 22C joined to the left and right outer surfaces of the second bracket 200, and a lower end portion of the extension portion 22A joined to a lower end portion of the first wire side portion 21A of the first wire 21. Also, the second wire 22 is joined to the front frame portion 21D of the first wire 21 at the bent convex portion 22G. As a result, the second wire 22 is fixed to the first wire 21 at one point between two adjacent skin attachment portions 22F.

The extending portion 22A of the second wire 22 is arranged along the first wire side portion 21A of the first wire 21 . Specifically, the second wire 22 has a front extending portion 22D arranged behind the front frame portion 21D along the front frame portion 21D, and an upward extending portion 22E arranged below the upper frame portion 21E along the upper frame portion 21E when viewed in the left-right direction.

Further, as shown in FIG. 6A, the front extending portion 22D is arranged at a position closer to the inside in the left-right direction of the case 2 than the front frame portion 21D when viewed from the front side (see the center line C1 of the second wire 22). The left and right outer portions of the front extending portion 22D are arranged so as to overlap the left and right inner portions of the front frame portion 21D in the front-rear direction as viewed from the front side. In addition, the upper extending portion 22E (see FIG. 4) extends obliquely so as to be positioned inward in the left and right direction toward the rear, and the entire portion is arranged at a position closer to the inner side in the left and right direction of the case 2 than the front frame portion 21D. Due to the arrangement of the front extension portion 22D and the upper extension portion 22E, each skin attachment portion 22F provided in the extension portion 22A is located inside (inside) the case 2, or more to the left and right inside of the case 2, relative to the front frame portion 21D of the first wire 21.

As shown in FIG. 3, the base member BA has a first frame portion F1, a second frame portion F2, a third frame portion F3, and a fourth frame portion F4.
The first frame portion F1 is a portion of the base member BA located on one of the left and right sides of the airbag module 10, in this embodiment, on the left and right outer sides, and is mainly composed of the first wire side portion 21A of the first wire 21.
The second frame portion F2 is a portion of the base member BA located on the left and right sides of the airbag module 10, in this embodiment, on the left and right inner sides, and is mainly composed of the side plate portion 210 of the second bracket 200 and the second wire side portion 23A of the third wire 23.

The third frame portion F3 is a portion of the base member BA that connects the lower portion of the first frame portion F1 and the lower portion of the second frame portion F2. As shown in FIG. 4, the third frame portion F3 is positioned below the airbag module 10. As shown in FIG. The third frame portion F3 is connected to the lower end portion 210C of the side plate portion 210 at a position behind the lower end projecting portion 216 provided on the side plate portion 210 of the second bracket 200 . The third frame portion F3 is connected to the side plate portion 210 of the second bracket 200 at a position behind the reinforcing convex portion 217 provided on the side plate portion 210 . The third frame portion F3 is arranged behind the front end of the airbag 11 and ahead of the rear end of the inflator 12 . Also, the third frame portion F3 is arranged in front of the center axis 12C of the inflator 12 . The third frame portion F3 is arranged between a first straight line L1 along the longitudinal direction of the inflator 12 passing through the front end of the harness 400 and a second straight line L2 along the longitudinal direction passing through the rear end of the harness 400 when viewed from the left-right direction.

The fourth frame portion F4 is a portion of the base member BA that connects the upper portion of the first frame portion F1 and the upper portion of the second frame portion F2, and is configured by the fourth wire 24 in this embodiment. The fourth wire 24 is positioned above the airbag module 10 and in front of the central axis 12C of the inflator 12 .

As shown in FIG. 6( a ), the case 2 has the wire frame 20 and the second bracket 200 insert-molded into the pad 70 . Pad 70 thus covers wire frame 20 and second bracket 200 . A skin member 80 covers the outside of the pad 70 .
The skin member 80 is a member that constitutes the outer surface of the side airbag device 1, and is made of cloth, leather, or the like. The skin member 80 mainly covers the second bracket 200, the wire frame 20, and the pad 70 from the front side, the upper side, and the left and right inner sides. Details of the skin member 80 will be described later.

As shown in FIG. 5, the pad 70 includes a front wall 71, an upper wall 72 extending rearward from the upper end of the front wall 71, a lower wall 73 extending rearward from the lower end of the front wall 71, and side walls 74 extending rearward from the left and right inner ends of the front wall 71. The side walls 74 have upper ends connected to left and right inner ends of the upper wall 72 and lower ends connected to left and right inner ends of the lower wall 73 .

The front wall 71 is a portion arranged on the front side of the airbag module 10 (see FIG. 6(a)), and has a slit 71A through which the airbag 11 passes to let the airbag 11 out of the case 2 when the airbag 11 is deployed. The slit 71A extends vertically. As shown in FIG. 6A, the skin member 80 is arranged along the surface of the pad 70 by entering the slit 71A of the pad 70. As shown in FIG. As shown in FIG. 7, the two parts of the outer skin member 80 that have entered the slit 71A are sewn together by a sewn portion 85 that is weak to each other.

As shown in FIGS. 5 and 6(a), the front wall 71 has a projection 75 projecting toward the airbag module 10 on its rear surface 71B. Here, the rear surface 71B of the front wall 71 has a lower rear surface 71C positioned below the projection 75 and an upper rear surface 71D positioned above the projection 75. The projection 75 protrudes rearward from the lower rear surface 71C and rearward from the upper rear surface 71D. In other words, the rear surface 71B of the front wall 71 has a shape in which both the lower rear surface 71C and the upper rear surface 71D are recessed forward with respect to the convex portion 75 .

The protrusions 75 are provided on both left and right sides of the slit 71A. Specifically, the convex portion 75 includes first convex portions 75A provided on the left and right outer sides of the slit 71A and second convex portions 75B provided on the left and right inner sides of the slit 71A. The first convex portion 75A and the second convex portion 75B have a vertically long shape, but the vertical length thereof is shorter than the vertical length of the slit 71A. The first protruding portion 75A and the second protruding portion 75B are provided in the vertical central portion away from the upper end and lower end of the slit 71A.

As shown in FIG. 7, the side surfaces F11 and F12 of the first convex portion 75A and the second convex portion 75B on the side of the slit 71A are flush with the inner surfaces F21 and F22 of the slit 71A. Specifically, the laterally inwardly directed side surface F11 of the first convex portion 75A and the laterally inwardly directed surface (F21) of the inner surface of the slit 71A are flat with no step therebetween, and the laterally outwardly facing surface F12 of the second convex portion 75B and the laterally outwardly directed surface (F22) of the slit 71A inner surface are in a flat state with no step therebetween.

As shown in FIG. 6(a), the webbing 30 is a member for controlling the deployment direction of the airbag 11 when the airbag 11 is deployed and for opening the torn portion 1C. The webbing 30 includes a first webbing 31 as an outer webbing for restricting the deployment direction of the airbag 11 from the left and right outer sides of the vehicle body, and a second webbing 32 as an inner webbing for restricting the deployment direction of the airbag 11 from the left and right inner sides of the vehicle body.

The first webbing 31 extends toward the left and right outer sides of the vehicle from slits 71A provided in the pad 70, and is arranged to pass through the left and right outer sides of the vehicle with respect to the airbag 11 (airbag module 10). That is, the first webbing 31 is arranged so as to pass between the airbag module 10 and the vehicle body (side panel 300). The second webbing 32 extends from the slit 71</b>A toward the left and right inner sides of the vehicle, and is arranged on the left and right inner sides of the vehicle with respect to the first webbing 31 .

As shown in FIG. 7, the front ends of the first webbing 31 and the second webbing 32 are attached to the skin member 80 by entering the slits 71A. Specifically, the front end of the first webbing 31 is sewn to the rear end of the portion of the skin member 80 that covers the inner surface F21 of the slit 71A by a sewing portion 86 that is stronger than the sewing portion 85, and the front end of the second webbing 32 is sewn to the rear end of the portion of the skin member 80 that covers the inner surface F22 of the slit 71A by a sewing portion 86 that is stronger than the sewing portion 85.

Returning to FIG. 6A , the webbing 30 is fixed to the fixed wire 60 fixed to the first bracket 100 by a connecting member CN as an attachment member, which is different from the webbing 30 . Specifically, the connecting member CN includes a first attachment wire 40 as an inner attachment member and a second attachment member, and a second attachment wire 50 as an outer attachment member and a first attachment member. The first webbing 31 has a second attachment wire 50 attached to the ring portion R1 and is fixed to the fixed wire 60 by the second attachment wire 50 . The second webbing 32 has a first attachment wire 40 attached to the ring portion R2 and is fixed to the fixed wire 60 by the first attachment wire 40 .

As shown in FIG. 8, the first webbing 31 has a ring portion R1 formed by folding the rear end portion of the fabric constituting the first webbing 31 and sewing the folded portions together in the vertical direction. The first webbing 31 has a first webbing upper portion 31A including a ring portion R1, a first webbing lower portion 31B positioned below the first webbing upper portion 31A, and a notch portion 31C that is formed at the front end portion of the first webbing upper portion 31A and opens to the front side.

The second webbing 32 has a ring portion R2 formed by folding the rear end portion of the upper portion of the cloth constituting the second webbing 32 and stitching the folded portion together in the vertical direction. The second webbing 32 has a second webbing upper portion 32A including a ring portion R2, a second webbing lower portion 32B positioned below the first webbing upper portion 31A and extending to the rear side of the first webbing upper portion 31A, a hook attachment cloth 33, and a hook 35.

The hook attachment cloth 33 mainly has a sewn portion 33A sewn to the upper end portion of the rear portion of the second webbing lower portion 32B, and a connecting portion 33B extending from the front end portion of the sewn portion 33A. A hook 35 is attached to the end of the connecting portion 33B by sewing or gluing. The connecting portion 33B is arranged to extend upward from the second webbing lower portion 32B by folding upward with the hook attachment cloth 33 sewn to the second webbing 32, whereby the hook 35 is arranged at the upper end portion of the connecting portion 33B.

The hook 35 is hooked on the second edge 213B of the engagement hole 213 formed in the second bracket 200 (see FIGS. 3 and 18). Thereby, the hook 35 fixes the edge of the second webbing lower part 32B in the longitudinal direction of the inflator 12, specifically the upper edge of the second webbing lower part 32B (left and right inner portions of the upper edge of the loop part 30A described later) to the case 2. The connecting portion 33B has a trapezoidal shape that widens with increasing distance from the hook 35 .

As shown in FIG. 9, rear ends of the first webbing lower part 31B and the second webbing lower part 32B are sewn together along the vertical direction. Thus, the webbing 30 has a loop portion 30A surrounding the airbag module 10 when viewed in the longitudinal direction. In the present embodiment, the first webbing 31 and the second webbing 32 are composed of different cloths, but the first webbing and the second webbing may be composed of one cloth. In this case, the loop portion can also be made of one piece of cloth.

As shown in FIG. 6A, the projection 75 provided on the front wall 71 of the pad 70 is covered with the webbing 30 when viewed from the airbag module 10 side, that is, from the rear side. Specifically, the first convex portion 75A is covered with the first webbing 31 when viewed from the rear side, and the second convex portion 75B is covered with the second webbing 32 when viewed from the rear side.

As shown in FIG. 3, the first bracket 100 is a plate-like member to which the inflator 12 (airbag module 10) is fixed, and is made of a metal plate. The first bracket 100 is arranged inside the left and right sides of the airbag 11 (airbag module 10). The first bracket 100 is arranged between the second bracket 200 and the vehicle body (side panel 300) (see FIG. 6(a)). The first bracket 100 is fixed to a second bracket 200 that constitutes the case 2 with the airbag module 10 attached.

The first bracket 100 has a body portion 110 to which the airbag module 10 is fixed, a harness facing portion 120 as a bulging portion, a connector fixing portion 130, a notch portion 140, a first fixing portion 150, a second fixing portion 160, and a third fixing portion 170.

The body portion 110 is a portion to which the airbag module 10 is fixed, and is provided with two fixing holes 111 through which the two bolts 12B of the inflator 12 are respectively inserted. A bolt 12B is inserted into the fixing hole 111, and a nut 12N is screwed onto the bolt 12B, thereby fixing the airbag module 10 to the main body portion 110. As shown in FIG. The airbag module 10 is arranged on the left and right outer sides of the body portion 110 . A fixing wire 60 for fixing the connecting member CN is joined to the body portion 110 by welding or the like. A notch portion 110A is formed in the front end portion of the main body portion 110 so as to form a shape recessed toward the rear with respect to the upper end portion.

The harness facing portion 120 is a portion that faces the first portion 410 (see FIG. 4) of the harness 400 in the left and right direction, and extends upward from the upper end of the main body portion 110 . The harness facing portion 120 bulges toward the left and right inner sides opposite to the left and right outer sides where the airbag module 10 is arranged with respect to the main body portion 110 and the connector fixing portion 130 (see also FIG. 14). A fixing hole 121 with which a second clip 450 (see FIG. 14) for fixing the harness 400 to the first bracket 100 is engaged is provided in the lower portion of the harness facing portion 120 .

The connector fixing portion 130 is a portion to which a connector 471, which will be described later, is fixed, and extends upward from the front portion of the upper end of the harness facing portion 120 and further extends rearward. The connector fixing portion 130 is arranged on the opposite side of the main body portion 110 with the harness facing portion 120 interposed therebetween. Therefore, the connector fixing portion 130 is arranged at a position farther from the inflator 12 of the airbag module 10 fixed to the main body portion 110 than the harness facing portion 120 . A fixing hole 131 with which a third clip 460 (see FIGS. 14 and 15) for fixing the harness 400 to the first bracket 100 is engaged is provided in the lower portion of the connector fixing portion 130 . Further, a fixing hole 132 is provided in the upper portion of the connector fixing portion 130 to engage a fourth clip 470 (see FIG. 15) for fixing the harness 400 to the first bracket 100 together with the connector 471 .

The notch 140 is formed at the rear edge of the upper portion of the first bracket 100 . The notch 140 is a portion through which the striker 350 passes.

The first fixing portion 150 is provided at the lower end portion of the main body portion 110 and is shifted inward in the left-right direction with respect to the main body portion 110 . The first fixing portion 150 is provided with a fixing hole 151 through which the bolt 93B passes when fixing the side airbag device 1 to the vehicle body. A tongue portion 152 that engages with a bracket engaging hole 252 of the second bracket 200 extends from the lower end of the first fixing portion 150 when fixing the first bracket 100 to the second bracket 200 . The tongue portion 152 bends and extends inward from left to right. The width of the tongue portion 152 in the front-rear direction is substantially the same as the width of the bracket engaging hole 252 in the front-rear direction.

The second fixing portion 160 is provided at the rear end portion of the harness facing portion 120 and is shifted inward in the left-right direction with respect to the harness facing portion 120 . The second fixing portion 160 is provided with fixing holes 161 into which the bolts 91B are inserted when fixing the first bracket 100 to the second bracket 200 .

The third fixing portion 170 is provided at the rear end portion of the connector fixing portion 130 and is shifted inward in the left-right direction with respect to the connector fixing portion 130 . The third fixing portion 170 is provided with a fixing hole 171 into which the bolt 92B is inserted when fixing the side airbag device 1 to the vehicle body. Further, in the front side of the fixing hole 171 of the third fixing portion 170, an insertion hole 172 is provided as a right and left through hole through which the positioning portion 230 of the second bracket 200 passes.

As shown in FIG. 4, a first bracket 100 and a second bracket 200 as brackets are arranged at positions overlapping the airbag module 10 when viewed in the left-right direction. The first bracket 100 and the second bracket 200 are formed by die-cutting a metal plate. For this reason, as shown in FIG. 6(b), the first bracket 100 and the second bracket 200 have burrs BR formed by die-cutting on their outer peripheral portions and hole peripheral portions. The first bracket 100 and the second bracket 200 are arranged such that the burrs BR face the left and right inner sides opposite to the left and right outer sides where the airbag module 10 is arranged.

5, the second bracket 200 is insert-molded on the pad 70 together with the wire frame 20, and the pad 70 partially covers the portion of the second bracket 200 where the burr BR is formed. Specifically, in the present embodiment, the pad 70 covers the portion of the second bracket 200 where the flash BR is formed, excluding the rear edge portion of the first vehicle body fixing portion 270, the peripheral edge portions of the fixing holes 271 and 261, the rear edge portion and lower edge portion of the second vehicle body fixing portion 250, and the peripheral edge portions of the fixing hole 251 and the bracket engaging hole 252.

Further, as shown in FIG. 3, the welded portion between the second bracket 200 and the wire frame 20 is arranged so as to be located on the opposite side of the second bracket 200 to the side where the airbag module 10 is arranged. Specifically, the weld W1 between the side plate portion 210 of the second bracket 200 and the third wire 23 is positioned on the left and right inner side of the side plate portion 210 of the second bracket 200, which is opposite to the left and right outer side where the airbag module 10 is arranged. Further, as shown in FIG. 4, the weld W2 between the lower plate portion 220 of the second bracket 200 and the first wire lower portion 21B of the first wire 21 is located on the lower side of the lower plate portion 220 of the second bracket 200, opposite to the upper side where the airbag module 10 is arranged.

As shown in FIG. 10 , the first attachment wire 40 is a member attached to the second webbing 32 , and the second attachment wire 50 is a member attached to the first webbing 31 . In other words, the first attachment wire 40 is a member for attaching the second webbing 32 to the first bracket 100 , and the second attachment wire 50 is a member for attaching the first webbing 31 to the first bracket 100 . The fixed wire 60 is a member to which the first mounting wire 40 and the second mounting wire 50 are fixed. The first attachment wire 40, the second attachment wire 50 and the fixed wire 60 are made of metal.

The fixed wire 60 is a common attachment portion provided on the first bracket 100, and has a wire attachment portion 61 extending vertically, a pair of connection portions 62 extending forward from the upper and lower ends of the wire attachment portion 61, and a pair of fixed portions 63 extending vertically from the front ends of the connection portions 62 so as to approach each other. The pair of fixed portions 63 are fixed to the first bracket 100 (see FIG. 3).
The wire mounting portion 61 has two upper and lower wire engaging portions 61A as engaging portions provided on the first bracket 100. The portions with which hooking portions 42 and 52 of the mounting wires 40 and 50 engage with each other are bent so as to protrude forward.

The first attachment wire 40 has a first webbing attachment portion 41 extending vertically as a webbing attachment portion, two upper and lower first hook portions 42 as bracket attachment portions, a first upper extension portion 43 extending rearward from the upper end of the first webbing attachment portion 41 and connected to the upper first hook portion 42, and a first lower extension portion 44 extending rearward from the lower end of the first webbing attachment portion 41 and connected to the lower first hook portion 42.
The first webbing attachment portion 41 is a portion to which the second webbing 32 is attached. The second webbing 32 is attached to the first attachment wire 40 by passing the first webbing attaching portion 41 through the ring portion R2.

The first hooking portion 42 is a portion that is attached to the first bracket 100 (see FIG. 6A) by engaging with the wire attaching portion 61 (wire engaging portion 61A) of the fixed wire 60, and is curved so as to protrude rearward. The first attachment wire 40 is attached to the first bracket 100 by hooking the first hooking portion 42 onto the wire engaging portion 61A of the fixed wire 60 fixed to the first bracket 100 . Each end portion 42E of each first hooking portion 42 is bent and extends vertically so as to approach each other.

As shown in FIG. 11 , the first downward extending portion 44 extends toward the first upward extending portion 43 as the front portion goes rearward, and the rear portion extends substantially straight forward and backward. As a result, it is possible to secure the vertical length of the first webbing attachment portion 41 while making the portion attached to the fixed wire 60 compact. Therefore, the deployment direction of the airbag 11 can be well regulated by the second webbing 32 while being compact.

In the first attachment wire 40, the first downwardly extending portion 44 extends as described above, while the first upwardly extending portion 43 extends substantially straight forward and backward toward the first engaging portion 42 on the upper side, so that the shape thereof is vertically asymmetric. Specifically, the first attachment wire 40 has a protruding portion 45 protruding downward in one of the vertical directions on its lower side, and does not have such a protruding portion on its upper side. The projecting portion 45 constitutes a lower end portion that is part of the first webbing attachment portion 41 and a front portion that is part of the first downwardly extending portion 44 . With such a configuration, in the first attachment wire 40, the vertical center position P41 of the first webbing attachment portion 41 is shifted downward in one of the vertical directions with respect to the vertical center position P1 of the two upper and lower first hooking portions 42. Therefore, the first attachment wire 40 has a vertically asymmetrical shape.

As shown in FIG. 3, the first fixing portion 150, the second fixing portion 160, and the third fixing portion 170 of the first bracket 100 are displaced inward in the left-right direction with respect to the main body portion 110. On the other hand, the second vehicle-body fixing portion 250 of the second bracket 200 is displaced outward in the lateral direction with respect to the side plate portion 210. A space is created between 110 and the side plate portion 210 . A portion of the connecting member CN, specifically, a first downwardly extending portion 44 that is part of the first mounting wire 40 and a first upwardly extending portion 43 (not shown) that is arranged above the first downwardly extending portion 44 are arranged in a space between the first bracket 100 and the second bracket 200. More specifically, the first upwardly extending portion 43 and the first downwardly extending portion 44 of the first mounting wire 40 are arranged so as to pass through the side of the first bracket 100 opposite to the airbag module 10 in the left-right direction, specifically, the left and right inner sides of the first bracket 100.

Returning to FIG. 10 , the second attachment wire 50 includes a second webbing attachment portion 51 extending vertically as a webbing attachment portion, two upper and lower second hooking portions 52 as a bracket attachment portion, a second upper extending portion 53 extending left and right inward from the upper end of the second webbing attaching portion 51 and connected to the upper second hooking portion 52 , and a second lower extending portion 5 extending left and right inward from the lower end of the second webbing attaching portion 51 and connected to the lower second hooking portion 52 . 4.
The second webbing attachment portion 51 is a portion to which the first webbing 31 is attached. The first webbing 31 is attached to the second attachment wire 50 by passing the second webbing attachment portion 51 through the ring portion R1.

The second hooking portion 52 is a portion that is attached to the first bracket 100 (see FIG. 6A) by engaging with the wire attaching portion 61 (wire engaging portion 61A) of the fixed wire 60, and is curved so as to protrude inward in the left and right. The second attachment wire 50 is attached to the first bracket 100 by hooking the second hooking portion 52 onto the wire engagement portion 61A of the fixed wire 60 fixed to the first bracket 100 . Each end 52E of each second hooking portion 52 is bent and extended forward, and further bent vertically so as to approach each other.

In a state in which the first attachment wire 40 and the second attachment wire 50 are attached to the fixed wire 60 (first bracket 100), the two upper and lower second hooks 52 are arranged between the two upper and lower first hooks 42. In addition, when the second hooking portion 52 is engaged with the wire mounting portion 61 , the end portion 52E of the second hooking portion 52 is engaged with the end portion 42E of the first hooking portion 42 . Therefore, not only the first mounting wire 40 engages with the fixed wire 60 and the second mounting wire 50 engages with the fixed wire 60, but also the second mounting wire 50 engages with the first mounting wire 40 so that these three parts are not easily disengaged.

As shown in FIG. 11, the second upwardly extending portion 53 and the second downwardly extending portion 54 extend toward each other toward the rear. Thereby, the vertical length of the second webbing attachment portion 51 can be ensured while the portion attached to the fixed wire 60 has a compact configuration. Therefore, the deployment direction of the airbag 11 can be well regulated by the first webbing 31 while being compact.

The second attachment wire 50 has a vertically asymmetrical shape because the vertically extending portion of the second upwardly extending portion 53 is longer than the vertically extending portion of the second downwardly extending portion 54 . Specifically, the second attachment wire 50 has an upper projecting portion 55 projecting upward and a lower projecting portion 56 projecting downward. The upper overhanging portion 55 constitutes the upper end portion that is part of the second webbing attachment portion 51 and the second upper extending portion 53, and the lower overhanging portion 56 constitutes the lower end portion that is part of the second webbing attaching portion 51 and the second lower extending portion 54. The upper projecting portion 55 projects more than the lower projecting portion 56 . With such a configuration, in the second attachment wire 50, the vertical center position P51 of the second webbing attachment portion 51 is shifted upward in the other vertical direction, here, with respect to the vertical center position P1 of the two upper and lower second hooking portions 52. Therefore, the second attachment wire 50 has a vertically asymmetrical shape.

The second mounting wire 50 attached to the first webbing 31 can be engaged with the wire engaging portion 61A of the first bracket 100 in a second posture in which the first bracket 100 is fixed to the case 2, as shown in FIG. On the other hand, the second attachment wire 50 attached to the first webbing 31 cannot be separated from the wire engaging portion 61A because the first webbing 31 can hardly expand or contract when the first bracket 100 is fixed to the case 2, as shown in FIG. 6(a). As an example, the predetermined angle θ is desirably 20°, more desirably 30°, and even more desirably 40°.

As shown in FIG. 6A, the first attachment wire 40 and the second attachment wire 50 are arranged within the width of the wire frame 20 in the left-right direction (between straight lines L3 and L4 shown in FIG. 6A). Specifically, the first attachment wire 40 and the second attachment wire 50 are arranged between the third wire 23 and the first wire 21 such that the length from the left and right inner surfaces of the first downwardly extending portion 44 (and the first upwardly extending portion 43) to the left and right outer surfaces of the second webbing attachment portion 51 is smaller than the length from the left and right inner surfaces of the third wire 23 to the left and right outer surfaces of the first wire 21.

As shown in FIG. 13 , the upper bolt 12B of the inflator 12 is located at a position different from the second webbing lower part 32B in the longitudinal direction of the inflator 12 . Specifically, the upper bolt 12B is located above the second webbing lower portion 32B (loop portion 30A). In FIG. 13, the first webbing 31 is indicated by a two-dot chain line, and the second webbing 32 is indicated by a one-dot chain line.

In addition, the two bolts 12B of the inflator 12 are positioned so as to overlap the second webbing upper portion 32A in the longitudinal direction, and do not pass through the second webbing upper portion 32A. Specifically, as shown in FIG. 6A, the second webbing upper portion 32A is short in the front-rear direction and does not extend to the right side of the bolt 12B, that is, to the right side, so that the second webbing upper portion 32A is arranged so as not to interfere with the bolt 12B. The second webbing upper portion 32A and the fixed wire 60 are connected by a first attachment wire 40 that is long in the front-rear direction. A first attachment wire 40 is arranged at a portion where the inflator 12 and the bolt 12B are positioned in the front-rear direction.

As shown in FIG. 13, the first attachment wire 40 is arranged at a position different from that of the bolt 12B when viewed in the left-right direction. That is, the first attachment wire 40 is arranged so as not to interfere with the bolt 12B. On the other hand, as shown in FIG. 6(a), the first attachment wire 40 is arranged at a position where the first downwardly extending portion 44 and the first upwardly extending portion 43 (not shown) disposed above the first downwardly extending portion 44 overlap the bolt 12B when viewed in the vertical direction. Returning to FIG. 13 , the upper bolt 12B is arranged between the first upwardly extending portion 43 and the first downwardly extending portion 44, and the lower bolt 12B is arranged below the first downwardly extending portion 44.

One longitudinal end of the airbag module 10, specifically the lower end, is covered with the loop portion 30A of the second webbing lower portion 32B. In addition, the lower end of the first bracket 100 overlaps the loop portion 30A in the longitudinal direction. In other words, the lower end portion of the first bracket 100 overlaps the loop portion 30A when viewed from the left-right direction.

In addition, as shown in FIG. 4, the first webbing attachment portion 41 of the first attachment wire 40 is arranged on the front side of the first bracket 100 so as not to overlap the first bracket 100 when viewed in the left-right direction. Specifically, the first webbing attachment portion 41 is arranged so as to be positioned in the notch portion 110A formed in the main body portion 110 of the first bracket 100, and is arranged in front of the front end portion of the main body portion 110 excluding the upper end portion.

A harness 400 for supplying electricity to the inflator 12 is connected to the airbag module 10 . The harness 400 is arranged inside the case 2 . The harness 400 has one end electrically connected to the inflator 12 and the other end electrically connected to a connector 471 fixed to the first bracket 100 . The harness 400 is connected to the other end in the vertical direction of the inflator 12 and extends from the end in the other vertical direction. Specifically, harness 400 is connected to the upper end of inflator 12 and extends upward from the upper end of inflator 12 . Harness 400 has a first portion 410 , a second portion 420 and a third portion 430 .

The first portion 410 is a portion arranged on the opposite side of the harness facing portion 120 of the first bracket 100 to the side where the airbag module 10 is arranged, that is, on the left and right inner sides. Also, as shown in FIG. 14 , the first portion 410 is arranged between the first bracket 100 and the second bracket 200 while the first bracket 100 is fixed to the second bracket 200 . Specifically, the first portion 410 is arranged in the space between the harness facing portion 120 of the first bracket 100 and the side plate portion 210 of the second bracket 200 .

The first portion 410 has a first end portion 411 on the second portion 420 side and a second end portion 412 on the third portion 430 side (the side opposite to the second portion 420 side). Specifically, the first end portion 411 is fixed to the left and right inner sides of the first bracket 100 by a second clip 450 as a first fixing member and a second fixing member, and the second end portion 412 is fixed to the left and right inner sides of the first bracket 100 by a third clip 460 as a first fixing member and a second fixing member.

The second clip 450 has a holding portion 451 serving as a first holding portion and a second holding portion that hold the first end portion 411 that is part of the harness 400 , and a claw portion 452 that engages with the first bracket 100 . The third clip 460 has a holding portion 461 serving as a first holding portion and a second holding portion that hold the second end portion 412 that is part of the harness 400 , and a claw portion 462 that engages with the first bracket 100 . The first end portion 411 is fixed to the left and right inner sides of the first bracket 100 by engaging the claw portions 452 of the second clip 450 with the fixing holes 121 of the harness facing portion 120 from the left and right inner sides while being held by the holding portion 451 of the second clip 450. Further, the second end portion 412 is fixed to the left and right inner sides of the first bracket 100 by engaging the claw portions 462 of the third clip 460 with the fixing holes 131 of the connector fixing portion 130 from the left and right inner sides while being held by the holding portions 461 of the third clip 460.

The holding portions 451 and 461 of the second clip 450 and the third clip 460 are arranged on the left and right inside of the first bracket 100 on the opposite side to the left and right outside where the inflator 12 is arranged. Moreover, the holding portions 451 and 461 are arranged on the left and right outer sides of the second bracket 200 where the inflator 12 is arranged. Therefore, the holding portions 451 and 461 are arranged between the first bracket 100 and the second bracket 200 .

The second portion 420 of the harness 400 is the portion that extends from the first end 411 of the first portion 410 and is connected to the inflator 12 . The second portion 420 connected to the inflator 12 is connected to the first portion 410 through the side of the first bracket 100 opposite to the side where the airbag 11 deploys, that is, the rear side of the first bracket 100 . More specifically, the second portion 420 is drawn from the left and right outer sides of the first bracket 100 where the inflator 12 is arranged to the left and right inner sides of the first bracket 100 through the rear side of the harness facing portion 120, and is connected to the first end portion 411 of the first portion 410.

The second portion 420 is fixed to the first bracket 100 by a first clip 440 as a fourth fixing member. The first clip 440 has a holding portion 441 that holds the second portion 420 of the harness 400 and a claw portion 442 that engages with the holding plate 13 of the airbag module 10 . The second portion 420 is attached to the holding plate 13 by engaging the claw portions 442 of the first clip 440 with the fixing holes 13A (see FIG. 3) of the holding plate 13 from the left and right sides while being held by the holding portion 441 of the first clip 440. The first clip 440 is fixed to the first bracket 100 via the holding plate 13 by being attached to the holding plate 13 fixed to the first bracket 100 . Thereby, the second portion 420 of the harness 400 is fixed to the left and right outer sides of the first bracket 100 via the holding plate 13 by the first clips 440 .

The third portion 430 of the harness 400 is the portion that extends from the second end 412 of the first portion 410 and is connected to the connector 471 . The third portion 430 extends from the second end portion 412 of the first portion 410 located on the inner left and right sides of the first bracket 100 to the outer left and right sides of the first bracket 100 where the airbag module 10 is arranged through the front side of the connector fixing portion 130, and is connected to the connector 471. As shown in FIG. 15 , the connector fixing portion 130 of the first bracket 100 has a flange 133 bent inward in the left and right direction at the front end facing the third portion 430 . Therefore, even if the third portion 430 contacts the front end portion of the connector fixing portion 130 , the third portion 430 contacts the curved curved portion of the flange 133 rather than the edge portion of the metal plate forming the first bracket 100 .

The third portion 430 is fixed to the left and right outer sides of the first bracket 100 by fourth clips 470 as third fixing members. The fourth clip 470 has a connector 471 that holds the third portion 430 by connecting the end of the third portion 430 and a claw portion 472 that engages with the first bracket 100 . The third portion 430 is fixed to the left and right outer sides of the first bracket 100 together with the connector 471 by engaging the claw portions 472 of the fourth clip 470 with the fixing holes 132 (see FIG. 3) of the connector fixing portion 130 from the left and right outer sides. The connector 471 is arranged on the left and right outer sides of the first bracket 100, which is the same side as the inflator 12 is arranged. A connector of a harness (not shown) for supplying electricity to the inflator 12 from a power supply provided outside the side airbag device 1 is connected to the connector 471 .

As shown in FIG. 4 , each clip 440 to 470 is a harness fixing member for fixing harness 400 to first bracket 100 . All of the clips 440 to 470 are arranged outside the deployment locus 11A when the airbag 11 is deployed when viewed from the left-right direction. Specifically, the clips 440 to 470 are arranged entirely behind the deployment locus 11A of the airbag 11 . Also, the first clip 440 (particularly, the holding portion 441 projecting to the side where the airbag module 10 is arranged) is arranged on the rear side of the airbag 11 . Second clip 450 , third clip 460 and fourth clip 470 are arranged above one end of harness 400 connected to inflator 12 (lower end of harness 400 ). Second clip 450 , third clip 460 and fourth clip 470 are arranged above airbag module 10 .

Each of the clips 440 to 470 is arranged above the engaging portions 42, 52 of the connecting member CN (attachment wires 40, 50). Furthermore, each of the clips 440 to 470 is arranged above the wire engagement portion 61A (see FIG. 10) of the fixed wire 60 fixed to the first bracket 100 to which the hooks 42, 52 are attached.

Each of the clips 440 to 470 is arranged so as to be different in vertical or longitudinal direction from the striker 350 provided on the vehicle body. Specifically, the first clip 440 and the second clip 450 are arranged below the striker 350 , and the fourth clip 470 is arranged above the striker 350 . Also, the third clip 460 is arranged in front of the striker 350 . On the other hand, as shown in FIG. 14, the clips 440 to 470 are arranged so as to overlap with the striker 350 in the horizontal direction.

As shown in FIG. 6(a), the skin member 80 includes a first skin member 510, a second skin member 520, and a wire fastener 550 as a fastener.
The first skin member 510 has an inner cover portion 511 as a first cover portion, a front cover portion 512, an upper cover portion 513 (see FIG. 16B), an inner fixing portion 514 as a base fixing portion, an outer fixing portion 515, a third cover portion 531, and a fourth cover portion 541.

The inner cover portion 511 is a portion that covers the base member BA and the pad 70 from the left and right inner sides. As shown in FIG. 16B, the inner cover portion 511 has a first hole 516 through which a striker 350 provided on the vehicle body is inserted while the side airbag device 1 is attached to the vehicle body. In addition, the inner cover portion 511 has an opening 517 that exposes the vehicle body fixing portions 250 and 270 that are part of the second bracket 200 . Specifically, the opening 517 includes a first opening 517A exposing the first vehicle body fixing portion 270 and a second opening 517B exposing the second vehicle body fixing portion 250. As shown in FIG.

In addition, the inner cover portion 511 has a slit hole 518 and a notch portion 519 through which a portion of the pad 70 is exposed. The pad 70 has a ridgeline portion 76 extending substantially in the front-rear direction on the left and right inner surfaces and convexes toward the left and right inner sides. The left and right inner surfaces of the pad 70 follow the shape of the left and right outer surfaces of the side panels 300 (see FIG. 2) of the vehicle body, the upper portion of the ridgeline portion 76 extending along the vertical direction, and the lower portion of the ridgeline portion 76 extending obliquely so as to be positioned to the left and right outer sides as it goes downward. The slit hole 518 is formed to extend substantially back and forth along the ridgeline portion 76 of the pad 70 .

The front side cover portion 512 is a portion that covers the second bracket 200 and the pad 70 from the front side, and extends outward from the front end of the inner cover portion 511 to the left and right. A split portion 1</b>C that splits when the airbag 11 deploys is provided in the front cover portion 512 .
The upper cover portion 513 covers the second bracket 200 and the pad 70 from above, extends rearward from the upper end of the front cover portion 512 , and has left and right inner ends connected to the upper end of the front cover portion 512 .

As shown in FIG. 6A , the inner fixing portion 514 extends laterally outward from the rear end of the inner cover portion 511 . The inner fixing portion 514 is arranged so as to wrap around the rear end portion of the pad 70 , and the end portion 514</b>A faces the left and right outer surfaces of the pad 70 . The inner fixing portion 514 has a hook 82 that can be engaged with the engaging hole 213 of the second bracket 200 at the end portion 514A. The hooks 82 are hooked on the first edges 213A (see FIG. 3) of the engagement holes 213 from the left and right outer sides, whereby the inner fixing portion 514 of the first skin member 510 of the skin member 80 is fixed to the second bracket 200 of the base member BA.

The outer fixing portions 515 extend rearward from the left and right outer ends of the front cover portion 512 . The outer fixing portion 515 has a hook 81 as an engaging portion that can be engaged with the second wire 22 of the wire frame 20 at the end portion 515A. Hook 81 is a frame engaging member that engages wire frame 20 to fasten skin member 80 to wire frame 20 . The hooks 81 are hooked on the skin attachment portions 22F of the second wires 22 from the left and right outer sides, whereby the outer fixing portions 515 of the first skin member 510 of the skin member 80 are fixed to the wire frame 20 of the base member BA. The hooks 81 and 82 are attached to the ends 514A and 515A of the skin member 80 by sewing or gluing.

The front wall 71 and the upper wall 72 of the pad 70 are respectively formed with recesses 77 capable of receiving the hooks 81 at the edges corresponding to the skin attachment portions 22F of the second wires 22 (see also FIG. 5). Further, on the front wall 71 of the pad 70, recesses 78 capable of receiving a part of the skin member 80 are formed along the first protrusions 75A on the outer sides of the protrusions 75 in the left-right direction of the vehicle, specifically, on the left and right outer sides of the first protrusions 75A (see also FIG. 5). The recesses 77 and 78 have a shape that is recessed toward the left and right inner sides, thereby opening to the left and right outer sides. The part of the skin member 80 that enters the concave portion 78 is, for example, the end portion 515A of the outer fixing portion 515, more specifically, the portion of the end portion 515A behind the concave portion 77, or the like.

The hook 81 that enters the recess 77 has a U-shaped hook portion 81A that engages with the skin attachment portion 22F of the wire frame 20, and a flat skin fixing portion 81B that extends from one end of the hook portion 81A and is attached with the end portion 515A of the skin member 80. The skin fixing portion 81B extends toward the side opposite to the side where the airbag module 10 is arranged with respect to the hook 81 . Specifically, as shown in FIG. 6A, the skin fixing portion 81B of the hook 81 that engages the front extending portion 22D of the second wire 22 extends toward the front side opposite to the rear side where the airbag module 10 is arranged. The outer skin fixing portion 81B extends obliquely so as to be positioned on the left and right outer sides as it goes forward. Further, the skin fixing portion 81B (see FIG. 4) of the hook 81 that engages with the upwardly extending portion 22E of the second wire 22 extends toward the upper side opposite to the lower side where the airbag module 10 is arranged.

The third cover portion 531 is a portion that covers the left, right, and rear sides of the airbag module 10 and extends rearward from the end portion 515A of the outer fixing portion 515 . Specifically, the third cover portion 531 has its front end sewn to the end portion 515A. A hook-shaped engaging member 532 is attached to the rear end portion of the third cover portion 531 by sewing or gluing.

The fourth cover portion 541 extends laterally outward from the rear end portion of the inner cover portion 511 . Specifically, the fourth cover portion 541 has left and right inner ends sewn to the inner fixing portion 514 extending from the rear end of the inner cover portion 511 . The fourth cover portion 541 is arranged on the rear side of the airbag module 10 . The fourth cover part 541 is connected to the third cover part 531 . Specifically, flat plate-shaped engaged members 542 are attached to the left and right outer ends of the fourth cover portion 541 by sewing or gluing, and the engaged members 542 are connected to the third cover portion 531 by engaging the engaging members 532 of the third cover portion 531.

The second skin member 520 has a second cover portion 521 that covers the inner cover portion 511 of the first skin member 510 . As shown in FIG. 16(a), the second cover portion 521 is a portion forming the inner side surface 1S of the side airbag device 1, and the front end and upper end are sewn to the front end and upper end of the inner cover portion 511. The second cover portion 521 has a second hole 526 through which the striker 350 is inserted while the side airbag device 1 is attached to the vehicle body.

Line fastener 550 is a member for fastening second cover portion 521 of second skin member 520 to first skin member 510 , and is provided on first skin member 510 and second skin member 520 . Specifically, as shown in FIG. 16B, the line fastener 550 has a pair of elements 551 and one slider 552, one element 551 is attached to the inner cover portion 511 of the first skin member 510, and the other element 551 is attached to the second cover portion 521 of the second skin member 520. As shown in FIG. 16(a), the line fastener 550 is arranged along the rear end of the inner surface 1S. Specifically, the line fastener 550 has one element 551 arranged along the rear end portion of the inner cover portion 511 and the other element 551 arranged along the rear end portion of the second cover portion 521 .

As shown in FIG. 17 , a plate member 560 is attached to the inner cover portion 511 of the first skin member 510 , and a cloth-like member 570 is attached to the second cover portion 521 of the second skin member 520 .

The plate member 560 is a plate-like member made of resin, and has a pair of insertion holes 561 through which the pair of first rod-shaped portions 351 of the striker 350 are inserted, and a cut 562 provided between the pair of insertion holes 561 so as to connect the pair of insertion holes 561. The plate member 560 has cuts 562 so that the second rod-shaped portions 352 of the striker 350 can pass through, thereby allowing the pair of first rod-shaped portions 351 to pass through the pair of insertion holes 561 . The plate member 560 is attached to the portion around the first hole 516 of the inner cover portion 511 from the left and right outer sides by sewing or gluing.

Like the skin member 80, the cloth member 570 is made of cloth, leather, or the like. The cloth-like member 570 has a blind portion 571 that covers the portion between the pair of first rod-like portions 351 of the striker 350 inserted through the second hole 526 of the second cover portion 521, and more specifically, the portion (cut 562) between the pair of insertion holes 561 of the plate member 560 attached to the inner cover portion 511. The blindfold portion 571 is exposed to the inside of the vehicle interior through the second hole 526 . The cloth-like member 570 is attached to, for example, a portion above the second hole 526 of the second cover portion 521 around the second hole 526 by sewing or bonding from the left and right outside.

Next, an example of a method of assembling (manufacturing) the side airbag device 1 and a method of attaching the side airbag device 1 to the vehicle body will be described.
As shown in FIG. 3, first, the second bracket 200 and the wire frame 20 are fixed by welding to form the base member BA. Next, the base member BA is placed in a mold (not shown) to integrally mold the pads 70 with the base member BA as shown in FIG.

Next, the front end portion of the webbing 30 is joined to the first skin member 510 of the skin member 80 . Then, the pad 70 is covered with the skin member 80 (first skin member 510 ), and the skin member 80 is fixed to the second bracket 200 and the wire frame 20 . Specifically, the hook 82 attached to the end portion 514A of the inner fixing portion 514 is hooked to the engagement hole 213 of the second bracket 200, and the hook 81 attached to the end portion 515A of the outer fixing portion 515 is hooked to the skin attachment portion 22F of the wire frame 20.

Next, the webbing 30 (the first webbing 31 and the second webbing 32) is passed from the front to the rear of the slit 71A of the pad 70 (webbing insertion step). As a result, the webbing 30 extends rearward from the front wall 71 of the pad 70 as shown in FIG. After that, the first attachment wire 40 is attached to the second webbing 32 by passing the first attachment wire 40 through the ring portion R2 of the second webbing 32, and the second attachment wire 50 is attached to the first webbing 31 by passing the second attachment wire 50 through the ring portion R1 of the first webbing 31. Then, the hook 35 of the second webbing 32 is hooked to the engagement hole 213 of the second bracket 200 . As a result, the left and right inner portions of the upper edge of the loop portion 30A provided at the lower portion of the second webbing 32 are maintained in an open state along the second bracket 200 . Also, the first attachment wires 40 are arranged on the left and right outer sides of the second bracket 200 so as to pass through the left and right outer sides of the second bracket 200 .

Also, as shown in FIG. 3, the airbag module 10 is attached to the first bracket 100 (module attachment step). Specifically, the two bolts 12B are passed through the fixing holes 111 of the first bracket 100, and the nuts 12N are tightened. Also, as shown in FIG. 14 , the harness 400 extending from the airbag module 10 and the connector 471 provided at the end of the harness 400 are fixed to the first bracket 100 . At this time, the harness 400 is fixed to the first bracket 100 by the clips 440 to 470 so that the entire clips 440 to 470 including the connector 471 are arranged outside the deployment locus 11A of the airbag 11 when viewed from the left-right direction (see FIG. 4) (harness mounting step).

Specifically, the first clip 440 attached to the second portion 420 of the harness 400 is engaged with the fixing hole 13A (see FIG. 3) of the holding plate 13 of the airbag module 10 and attached. Also, the harness 400 is passed through the rear side of the first bracket 100 and left and right inside, and the second clip 450 attached to the first end portion 411 of the first portion 410 is engaged with the fixing hole 121 of the first bracket 100 and attached. Also, the third clip 460 attached to the second end portion 412 of the first portion 410 is engaged with the fixing hole 131 of the first bracket 100 and attached. Then, the harness 400 is pulled out through the front side of the first bracket 100 to the left and right outside, and the fourth clip 470 having the connector 471 is engaged with the fixing hole 132 of the first bracket 100 and attached.

Next, as shown in FIG. 18 , the upper portion of the webbing 30 is opened to the left and right, and the lower end portions of the airbag module 10 and the first bracket 100 are inserted into the loop portions 30A of the webbing 30 . Then, the engaging portions 42 and 52 (see FIG. 4) of the connecting member CN to which the webbing 30 is attached are attached to positions below the clips 440 to 470 that fasten the harness 400 of the first bracket 100 (webbing attaching step). Specifically, as shown in FIG. 12, the first hooking portion 42 of the first attachment wire 40 attached to the second webbing 32 is hooked to the wire engaging portion 61A of the fixed wire 60 fixed to the first bracket 100 to engage (second attachment step). Next, the first bracket 100 is set to a second posture in which the rear end portion thereof is rotated laterally outward by a predetermined angle θ about the front end portion thereof, with respect to the first posture (see FIG. 6A) in which the first bracket 100 is fixed to the second bracket 200 (case 2). Then, the second attachment wire 50 attached to the first webbing 31 is pulled rearward through the left and right outer sides of the airbag module 10 and the first bracket 100, and the second hooking portion 52 is hooked to the wire engaging portion 61A and the first hooking portion 42 to be engaged (first attachment step).

Next, the first bracket 100 is turned from the second posture shown in FIG. 12 to the left and right with the rear end centered on the front end, and as shown in FIG. As a result, the first webbing 31 can be in a state of being moderately stretched. When rotating the first bracket 100, the tongue 152 of the first bracket 100 is inserted into the bracket engaging hole 252 of the second bracket 200, as shown in FIG. After that, the first bracket 100 is fixed to the second bracket 200 (case 2) (bracket fixing step). Specifically, the bolt 91B is passed through the fixing hole 161 and the hole 261 (see FIG. 18) from the left and right outer sides and fastened to the nut 91N. Thereby, the airbag module 10 is fixed to the second bracket 200 via the first bracket 100 .

Next, the exposed airbag module 10 and the like at this stage are covered with a third cover portion 531 as shown in FIG. 6(a). Specifically, the third cover portion 531 is pulled rearward through the left and right outer sides of the airbag module 10 , and the fourth cover portion 541 is pulled left and right outer sides to engage the engaged member 542 with the engaging member 532 .
The side airbag device 1 can be manufactured through the above steps. The order of the above steps may be changed as appropriate.

When mounting the side airbag device 1 to the vehicle body, first, the airbag mounting bracket 340 and the base bracket 360 to which the striker 350 is fixed are fixed to the side panel 300, as shown in FIG. Further, as shown in FIG. 16(b), the line fastener 550 of the skin member 80 is opened. At this time, the fixing hole 271 of the second bracket 200 is exposed from the first opening 517A of the first skin member 510, and the fixing hole 251 is exposed from the second opening 517B.

Then, the side airbag device 1 is arranged at the mounting position of the side panel 300 . Specifically, the side airbag device 1 is brought closer to the side panel 300 from the left and right inner sides, and as shown in FIG.

Then, as shown in FIG. 3, the bolts 93B are passed through the fixing holes 251 of the second bracket 200, the fixing holes 151 of the first bracket 100, and the holes 341 of the airbag mounting bracket 340 from the left and right inner sides, and lightly tightened to the nuts 93N fixed to the airbag mounting bracket 340 for temporary fixing. Thereafter, as shown in FIG. 13, the side airbag device 1 is rotated about the bolt 93B, and the positioning portion 230 of the second bracket 200 is brought into contact with the bracket engagement surface 364A of the base bracket 360 from the front, thereby determining the position of the side airbag device 1 with respect to the vehicle body.

After that, as shown in FIG. 3, the bolts 92B are passed through the fixing holes 271 of the second bracket 200, the fixing holes 171 of the first bracket 100, and the holes 364B of the base bracket 360 from the left and right inner sides, and are fastened to the nuts 92N fixed to the base bracket 360, and the lower bolts 93B are firmly fastened to the nuts 93N. Then, as shown in FIGS. 16(b) to 16(a), the striker 350 is inserted through the second hole 526 of the second skin member 520, and then the slider 552 is slid to close the wire fastener 550. The inner cover portion 511 is covered with the second cover portion 521.
Through the above steps, the side airbag device 1 can be attached to the vehicle body.

The effects of the side airbag device 1 of this embodiment as described above will be described.
When the first webbing 31 is fixed, the first webbing 31 can be bent in the second posture in which the first bracket 100 is rotated by a predetermined angle, and the second attachment wire 50 attached to the first webbing 31 can be engaged with the wire engaging portion 61A of the first bracket 100, so that the first webbing 31 can be easily fixed. By fixing the first bracket 100 to the case 2 in the first posture, the first webbing 31 can be appropriately stretched. As a result, when the airbag 11 is deployed, the deployment direction of the airbag 11 can be well regulated by the first webbing 31, so that the airbag 11 can be deployed well.

Further, since the first mounting wire 40 is arranged to pass through the side of the first bracket 100 opposite to the airbag module 10, contact between the airbag 11 and the first mounting wire 40 for fixing the second webbing 32 can be suppressed when the airbag 11 is deployed. As a result, the airbag 11 can be deployed satisfactorily.

Further, since the first attachment wire 40 is arranged at a position different from the bolt 12B when viewed from the left and right direction, the first attachment wire 40 attached to the second webbing 32 is less likely to interfere with the bolt 12B of the inflator 12 when fixing the second webbing 32. Therefore, the second webbing 32 can be easily fixed.

Further, since the rear surface 71B of the front wall 71 of the pad 70 is provided with the projection 75, the front wall 71 of the pad 70 can be supported by the airbag module 10 via the projection 75 when the front wall 71 of the pad 70 is loaded from the front side. As a result, it is possible to prevent the front wall 71 from deforming more than necessary, so that the seating feeling of the seat S provided with the side airbag device 1 can be improved.

In addition, since the projections 75 are provided on both the left and right sides of the slit 71A, the airbag 11 first spreads the left and right projections 75 when deploying the airbag 11, and by using these as footholds, the slit 71A can be spread and deployed. That is, by providing the projections 75 on both the left and right sides of the slit 71A, the area of the part of the pad 70 that is pushed out by the airbag 11 when the airbag 11 is deployed can be increased, so that the slit 71A can be easily pushed out. As a result, the airbag 11 can be deployed satisfactorily.

Also, since the convex portion 75 is provided in the vertical central portion away from the upper and lower ends of the slit 71A, the area of the portion of the pad 70 that is expanded by the airbag 11 becomes large in the vertical central portion of the slit 71A. Thereby, compared with the case where the projections 75 are provided at the upper end and the lower end of the slit 71A, the left and right projections 75 can be easily expanded when the airbag 11 is deployed, so that the slit 71A can be more easily expanded and the airbag 11 can be deployed more satisfactorily.

In addition, since there is no level difference between the side surfaces F11 and F12 of the projection 75 and the inner surfaces F21 and F22 of the slit 71A, the airbag 11 can be successfully deployed from the side surfaces F11 and F12 of the projection 75 to the front side of the front wall 71 via the inner surfaces F21 and F22 of the slit 71A when the airbag 11 is deployed. As a result, the airbag 11 can be deployed more satisfactorily.

Moreover, since the first webbing 31 is interposed between the airbag 11 and the first convex portion 75A (pad 70) by covering the first convex portion 75A with the first webbing 31, direct contact between the airbag 11 and the pad 70 can be suppressed when the airbag 11 is deployed. Further, since the first webbing 31 covers the first projection 75A and faces the slit 71A, when the airbag 11 is deployed, the airbag 11 is deployed along the first webbing 31 from the first projection 75A to the inner surfaces F21 and F22 of the slit 71A, so that the airbag 11 can be deployed more satisfactorily.

In addition, since the second convex portion 75B is covered with the second webbing 32, the second webbing 32 is interposed between the airbag 11 and the second convex portion 75B (pad 70), so that direct contact between the airbag 11 and the pad 70 can be suppressed when the airbag 11 is deployed. Further, since the second webbing 32 covers the second protrusion 75B and faces the slit 71A, when the airbag 11 is deployed, the airbag 11 is deployed along the second webbing 32 from the second protrusion 75B to the inner surfaces F21 and F22 of the slit 71A, so that the airbag 11 can be deployed more favorably. In particular, in the present embodiment, the first convex portion 75A is covered with the first webbing 31 and the second convex portion 75B is covered with the second webbing 32, so that the airbag 11 can be deployed more favorably when the airbag 11 is deployed.

Further, since both the lower rear surface 71C and the upper rear surface 71D of the rear surface 71B of the front wall 71 are recessed forward with respect to the convex portion 75, the volume of the pad 70 can be reduced. As a result, the weight of the pad 70 can be reduced, so that the weight of the side airbag device 1 including the pad 70 can be reduced.

Further, by storing the end portion 515A, which is a part of the skin member 80, in the concave portion 78 provided in the front wall 71 of the pad 70, the vicinity of the end portion 515A of the skin member 80 is less likely to protrude outside the case 2 greatly. As a result, the external shape of the case 2 can be clearly displayed, so that the appearance of the side airbag device 1 can be improved.

In addition, since the webbing 30 has a loop portion 30A at the bottom, by inserting the lower end portion of the airbag module 10 into the loop portion 30A, it is easy to align the airbag module 10 with the case 2 and to easily assemble the airbag module 10 with the case 2. - 特許庁On the other hand, the webbing 30 does not have a loop shape as a whole, but only a part of the lower side has a loop shape, and the upper side is divided into the first webbing upper part 31A and the second webbing upper part 32A. Therefore, it is easy to insert the airbag module 10 between the first webbing upper portion 31A and the second webbing upper portion 32A and insert the lower end portion of the airbag module 10 into the loop portion 30A. That is, the assembly work of the side airbag device 1 can be facilitated.

After the lower end of the airbag module 10 is inserted into the loop portion 30A, the first attachment wire 40 and the second attachment wire 50 are fixed to the fixing wire 60, thereby fixing the rear ends of the first webbing upper portion 31A and the second webbing upper portion 32A. For this reason, the upper part of the left and right webbing 30 can be firmly fixed, and the deployment direction of the airbag 11 can be reliably regulated by the webbing 30 .

In addition, since the upper bolt 12B of the inflator 12 is located at a different position from the second webbing lower part 32B (loop part 30A) in the longitudinal direction of the inflator 12, it is not necessary to pass the upper bolt 12B through the second webbing lower part 32B. Therefore, it is easy to insert the airbag module 10 into the loop portion 30A.

In addition, the bolt 12B of the inflator 12 is located at a position overlapping the second webbing upper part 32A in the longitudinal direction of the inflator 12, but since the first attachment wire 40 is arranged so as not to interfere with the bolt 12B, the work of fixing the first webbing 31 with the first attachment wire 40 is easy.

In addition, since the lower end of the first bracket 100 overlaps the loop portion 30A when viewed from the left-right direction, it can be confirmed whether the airbag module 10 has been assembled correctly by checking the positional relationship between the lower end of the first bracket 100 and the loop portion 30A after the airbag module 10 is inserted into the loop portion 30A.

In addition, since the lower end of the airbag module 10 is positioned in the loop portion 30A, the operation of inserting the airbag module 10 into the loop portion 30A is facilitated.

Moreover, since the airbag module 10 can be assembled by inserting it into the loop of the loop portion 30A from above, the assembly is easy.

Further, since the hooks 35 fix the upper edges of the left and right inner portions (the second webbing lower portion 32B) of the loop portion 30A to the case 2, the opening of the loop portion 30A is easy to open and the airbag module 10 is easy to insert into the loop portion 30A. In particular, in this embodiment, since the upper edge of the loop portion 30A is fixed to the case 2, the opening of the loop portion 30A opens upward, making it easy to insert the airbag module 10 into the loop portion 30A.

In addition, since the connection part 33B, which is the part of the second webbing 32 connected to the hook 35, becomes wider as it moves away from the hook 35, the edge of the loop part 30A can be opened in a wide range, and the airbag module 10 can be easily inserted into the loop part 30A.

Further, since the skin attachment part 22F of the second wire 22 is arranged at a position closer to the inside of the case 2 than the first wire 21, the hook 81 in a state of being engaged with the skin attachment part 22F can be suppressed from protruding greatly outside the case 2. - 特許庁As a result, the external shape of the case 2 can be clearly displayed, and the appearance of the side airbag device 1 can be improved.

Further, since the hook 81 does not protrude to the outside of the case 2, the size of the side airbag device 1 can be suppressed and the side airbag device 1 can be made compact. Moreover, since the harness 400 is arranged in the case 2, more specifically, in the space formed by being surrounded by the wire frame 20 and the second bracket 200, and does not protrude outside the case 2, the side airbag device 1 can be made compact by suppressing the increase in size.

Further, since the pad 70 has the concave portion 77 capable of receiving the hook 81, the hook 81 is less likely to protrude from the pad 70, and the external shape of the case 2 can be made more beautiful. Thereby, the appearance of the side airbag device 1 can be improved.

Further, since the bent convex portion 22G, which is the portion between the two adjacent skin attachment portions 22F of the second wire 22, is fixed to the first wire 21, the hook 81 can be engaged near the highly rigid portion of the second wire 22 fixed to the first wire 21. Thereby, the skin member 80 can be firmly fixed to the wire frame 20 .

In addition, the front extending portion 22D of the second wire 22 is arranged at a position closer to the inner side in the left-right direction of the case 2 than the front frame portion 21D of the first wire 21 when viewed from the front side, and overlaps with the front frame portion 21D. Therefore, the hook 81 can be engaged with the second wire 22 near the surface of the case 2 while preventing the hook 81 from protruding significantly outside the case 2. Thereby, the skin member 80 can be easily attached to the wire frame 20 .

Further, the harness 400 has the first portion 410 arranged on the side opposite to the side of the first bracket 100 on which the airbag module 10 is arranged, and the second portion 420 passes through the side of the first bracket 100 opposite to the side on which the airbag 11 deploys and is connected to the first portion 410, so that contact between the airbag 11 and the harness 400 can be suppressed when the airbag 11 deploys.

Also, since the first portion 410 is arranged between the first bracket 100 and the second bracket 200 , the first portion 410 of the harness 400 can be protected by the first bracket 100 and the second bracket 200 .

Further, since the first bracket 100 has the harness facing portion 120 that bulges to the left and right, the uneven shape is formed on the first bracket 100, so that the rigidity of the first bracket 100 can be improved. Since the first portion 410 is arranged between the harness facing portion 120 and the second bracket 200, the first portion 410 of the harness 400 can be effectively protected by the first bracket 100 having improved rigidity.

In addition, since the ends 411 and 412 of the first portion 410 are fixed to the first bracket 100, the movement of the first portion 410 can be suppressed. Accordingly, first portion 410 of harness 400 can be effectively protected between first bracket 100 and second bracket 200 .

Further, since the connector 471 is arranged on the side of the first bracket 100 where the airbag module 10 is arranged, that is, on the side opposite to the second bracket 200 side, the wiring work when mounting the side airbag device 1 to the vehicle body is facilitated. In addition, since the third part 430 of the harness 400 can be drawn toward the connector 471 from a position farther from the inflator 12 than the harness facing part 120 to the side where the airbag module 10 is arranged, contact between the airbag 11 and the third part 430 of the harness 400 can be suppressed when the airbag 11 is deployed.

Further, since the connector fixing portion 130 has the bent flange 133 at the front end facing the third portion 430 , the contact of the third portion 430 with the edge portion of the first bracket 100 can be suppressed. Thereby, the third portion 430 of the harness 400 can be protected.

In addition, since the skin member 80 is provided with the second skin member 520 including the second cover portion 521, the second cover portion 521 can cover the inner cover portion 511 of the first skin member 510 and the portions of the base member BA and the pad 70 exposed from the inner cover portion 511. In addition, since the first skin member 510 has the inner cover portion 511, by fixing the inner fixing portion 514 of the first skin member 510 to the base member BA, even if the wire fastener 550 provided on the first skin member 510 is pulled, it is possible to suppress the displacement thereof. can be suppressed. Thereby, the appearance of the inner surface 1S of the side airbag device 1 can be improved.

Further, since the plate member 560 is attached to the inner cover portion 511, the gap between the pair of first rod-shaped portions 351 of the striker 350 can be covered and hidden by the plate member 560. FIG. Thereby, the appearance of the inner surface 1S of the side airbag device 1 can be improved.

Moreover, since the cloth-like member 570 is attached to the second cover portion 521 , the cut 562 of the plate member 560 can be covered and hidden by the cloth-like member 570 . Thereby, the appearance of the inner surface 1S of the side airbag device 1 can be further improved. In addition, it is possible to prevent foreign matter from entering the side airbag device 1 or the like from between the pair of first rod-shaped portions 351 of the striker 350 .

Further, since the inner cover portion 511 has the opening 517 for exposing the vehicle body fixing portions 250 and 270 of the base member BA, the side airbag device 1 can be attached to the vehicle body from the left and right inner sides. This facilitates the mounting work of the side airbag device 1 . After the side airbag device 1 is attached to the vehicle body, the vehicle body fixing portions 250 and 270 can be covered and hidden by the second cover portion 521, so that the inner surface 1S of the side airbag device 1 can be kept in good appearance.

Further, since the base member BA has the first vehicle body fixing portion 270 and the second vehicle body fixing portion 250, and the opening 517 includes the first opening 517A and the second opening 517B, the side airbag device 1 can be firmly fixed to the vehicle body by the plurality of vehicle body fixing portions 250 and 270 while facilitating the mounting work of the side airbag device 1.

Further, since the inner cover part 511 has the slit hole 518 formed along the ridgeline part 76 of the pad 70, it is possible to suppress unnecessary force from being applied to the vicinity of the ridgeline part 76 of the pad 70 from the inner cover part 511 covering the pad 70.例文帳に追加Specifically, as shown in FIG. 19, if there is no slit 518, the skin member is stretched straight as indicated by the two-dot chain line, and there is a possibility that the skin member will apply a force that crushes the vicinity of the ridge 76 to the pad 70, but the presence of the slit 518 can suppress the application of such force. As a result, deformation of the pad 70 can be suppressed, so that the shape of the pad 70 can be clearly displayed, and the appearance of the inner surface 1S of the side airbag device 1 can be improved.

Further, since the wire fastener 550 is arranged along the rear end of the inner surface 1S, the second cover part 521 can be fastened to the first skin member 510 by the wire fastener 550 after the side airbag device 1 is attached to the vehicle body. This facilitates the mounting work of the side airbag device 1 . In addition, the appearance of the inner surface 1S of the side airbag device 1 can be improved, for example, compared to the case where the wire fastener 550 is conspicuously arranged near the center of the inner surface 1S in the front-rear direction.

In addition, since the skin member 80 includes the third cover portions 531 that cover the left, right, and rear sides of the airbag module 10 , the airbag module 10 can be protected by the third cover portions 531 . In addition, by covering the airbag module 10 with the third cover portion 531, the appearance of the side airbag device 1 before being attached to the vehicle body can be improved.

In addition, since the vertical center positions P41 and P51 of the webbing mounting portions 41 and 51 of the mounting wires 40 and 50 are displaced downward or upward from the vertical center positions P1 of the hooking portions 42 and 52, the webbing mounting portions 41 and 51 can be shifted upward or downward based on the position where the mounting wires 40 and 50 of the first bracket 100 are mounted. As a result, the degree of freedom in the layout of the parts constituting the side airbag device 1 can be improved compared to the conventional configuration in which approximately symmetrical installation spaces are required with respect to the position where the attachment wire is attached.

In addition, the vertical center position P41 of the first mounting wire 40 of the first webbing mounting portion 41 is shifted downward from the vertical center position P1 of the two upper and lower first hooks 42, and the vertical center position P51 of the second mounting wire 50 of the second webbing mounting portion 51 is shifted upward from the vertical center position P1 of the two upper and lower second locking portions 52. Therefore, when the airbag 11 is deployed, the first mounting wire of the first bracket 100 is shifted. The location where the force is concentrated from 40 and the location where the force is concentrated from the second attachment wire 50 can be dispersed. As a result, the force applied from the mounting wires 40 and 50 to the first bracket 100 when the airbag 11 is deployed can be balanced.

In addition, since the first attachment wire 40 has a projecting portion 45 that protrudes downward and constitutes the lower end of the first webbing attachment portion 41, and the harness 400 extends upward from the upper end of the inflator 12, it is possible to secure the vertical length of the first webbing attachment portion 41 while securing a space for arranging the harness 400. As a result, the vertical length of the portion of the second webbing 32 attached to the first webbing attachment portion 41 can be ensured, so that the deployment direction of the airbag 11 can be well regulated by the second webbing 32.

In addition, since the upper projecting portion 55 of the second mounting wire 50 protrudes more than the lower projecting portion 56, the vertical length of the second webbing mounting portion 51 can be ensured while improving the degree of freedom in layout. As a result, the vertical length of the portion of the first webbing 31 attached to the second webbing attachment portion 51 can be secured, so that the deployment direction of the airbag 11 can be well regulated by the first webbing 31.

Further, since the first upwardly extending portion 43 and the first downwardly extending portion 44 of the first mounting wire 40 are arranged in the space between the first bracket 100 and the second bracket 200, the first mounting wire 40 can be arranged compactly by utilizing the space between the first bracket 100 and the second bracket 200. Thereby, the degree of freedom of layout can be improved.

Further, the first mounting wire 40 is arranged at a position different from the bolt 12B of the inflator 12 when viewed from the left-right direction, and is arranged at a position overlapping with the bolt 12B when viewed from the top-bottom direction. As a result, the side airbag device 1 can be made compact in the lateral direction.

In addition, since the first mounting wire 40 and the second mounting wire 50 are attached to the common fixed wire 60 provided on the first bracket 100, the degree of freedom in layout can be improved compared to the case where the first bracket 100 is separately provided with the mounting portion for the first mounting wire 40 and the mounting portion for the second mounting wire 50.

Further, since the two second hooks 52 of the second attachment wire 50 are arranged between the two first hooks 42 of the first attachment wire 40, the first attachment wire 40 can restrain the second attachment wire 50 from moving up and down.

Further, since the first webbing attachment portion 41 of the first attachment wire 40 is arranged on the front side of the first bracket 100 and at a position not overlapping the first bracket 100 when viewed in the left-right direction, the length of the second webbing 32 can be shortened. As a result, the degree of freedom in layout can be improved, and the deployment direction of the airbag 11 can be well regulated by the second webbing 32 .

Further, in the side airbag device 1, since the mounting wires 40, 50 are arranged within the width of the wire frame 20 in the left-right direction, the mounting wires 40, 50 are arranged so as to be accommodated inside the wire frame 20 in the left-right direction, so that the side airbag device 1 can be made compact in the left-right direction.

Further, the clips 440 to 470 are wholly arranged outside the deployment locus 11A of the airbag 11 when viewed from the left and right direction, so that the airbag 11 can be prevented from coming into contact with the clips 440 to 470 when the airbag 11 is deployed.

In addition, since the clips 440 to 470 are arranged above the hooking portions 42 and 52 of the connecting member CN, when the side airbag device 1 is assembled by attaching the clips 440 to 470 and the connecting member CN, the clips 440 to 470 and the portion of the connecting member CN attached to the first bracket 100 are unlikely to interfere with each other. Thereby, the assembly work of the side airbag device 1 can be easily performed.

Moreover, since the holding portions 451 and 461 of the clips 450 and 460 are arranged between the first bracket 100 and the second bracket 200 , part of the harness 400 can be arranged between the first bracket 100 and the second bracket 200 . Thereby, the harness 400 can be protected by the first bracket 100 and the second bracket 200 . Also, the space between the first bracket 100 and the second bracket 200 in the side airbag device 1 can be effectively utilized.

Further, since the holding parts 451, 461 of the clips 450, 460 are arranged on the opposite side of the first bracket 100 to the side where the inflator 12 is arranged, the harness 400 whose one end is connected to the inflator 12 can be routed from the side where the inflator 12 is arranged to the opposite side of the first bracket 100. - 特許庁This can prevent the airbag 11 from coming into contact with the harness 400 when the airbag 11 is deployed. Moreover, compared to the case where the harness 400 is routed in front, behind, above, or below the first bracket 100, the harness 400 can be arranged in a compact manner in the front, rear, top, and bottom directions.

Further, since the connector 471 of the fourth clip 470 is arranged on the same side of the first bracket 100 as the side where the inflator 12 is arranged, the harness 400 can be routed from the opposite side of the first bracket 100 to the side where the inflator 12 is arranged to the side where the inflator 12 is arranged again. As a result, the harness 400 can be compactly arranged laterally compared to the case where the harness 400 pulled out to the side opposite to the side where the inflator 12 is arranged is arranged as it is on the side opposite to the side where the inflator 12 is arranged. Further, since the fourth clip 470 arranged outside the deployment locus 11A of the airbag 11 has the connector 471, it is possible to prevent the airbag 11 from contacting the connector 471 of the harness 400 when the airbag 11 is deployed. Further, since the connector 471 is arranged in the space above the airbag module 10, connection to the connector 471 can be facilitated.

In addition, since the clips 450, 460, 470 are arranged above the one end of the harness 400 connected to the inflator 12 and behind the deployment locus 11A, the clips 450 to 470 can be compactly arranged with respect to the first bracket 100. As a result, the length of harness 400 held by clips 450-470 can be shortened.

Also, since the first clip 440 is attached to the holding plate 13 of the airbag module 10 , the harness 400 can be fixed to the first bracket 100 via the holding plate 13 near the inflator 12 . Thereby, harness 400 can be restrained from moving near inflator 12 .

Also, since the first clip 440 is arranged on the rear side of the airbag 11 , the first clip 440 arranged near the airbag 11 is arranged in the direction opposite to the deploying direction of the airbag 11 . This can prevent the airbag 11 from coming into contact with the first clip 440 when the airbag 11 is deployed.

In addition, the side airbag device 1 is a device in which the inner surface 1S is exposed when the seatback S2 is moved, and the clips 440 to 470 overlap the striker 350 in the left-right position and differ in the vertical or front-back direction positions. As a result, at least part of the striker 350 provided on the vehicle body can be arranged in the side airbag device 1, and the side airbag device 1 and the striker 350 provided on the vehicle body can be arranged compactly.

Further, according to the side airbag device 1 manufactured by the manufacturing method according to the present embodiment, it is possible to prevent the airbag 11 from coming into contact with the clips 440 to 470 when the airbag 11 is deployed, as described above. Further, according to the manufacturing method according to the present embodiment, since the clips 440 to 470 are attached before attaching the connecting member CN (webbing 30), it is possible to suppress the harness 400 from interfering with the connecting member CN when attaching the harness 400. In addition, when attaching the connecting member CN, the engaging portions 42, 52 of the connecting member CN and the clips 440 to 470 are unlikely to interfere with each other.

Moreover, since the base member BA has the third frame portion F3 that connects the lower portions of the first frame portion F1 and the second frame portion F2, the rigidity of the base member BA can be improved. Further, since the third frame part F3 is arranged behind the front end of the airbag 11 and in front of the rear end of the inflator 12, the side airbag device 1 can be made compact in the front-rear direction. In addition, since the portions near the front side of the first frame portion F1 and the second frame portion F2 can be connected by the third frame portion F3, the first frame portion F1 and the second frame portion F2 can be prevented from being deformed so as to expand to the left and right when the airbag 11 is deployed.

Further, since the third frame portion F3 is arranged in front of the central axis 12C of the inflator 12, the front side of the first frame portion F1 and the second frame portion F2 can be connected by the third frame portion F3. As a result, deformation of the first frame portion F<b>1 and the second frame portion F<b>2 so as to expand to the left and right can be further suppressed when the airbag 11 is deployed.

Moreover, since the base member BA has the fourth frame portion F4 that connects the upper portions of the first frame portion F1 and the second frame portion F2, the rigidity of the base member BA can be further improved. In addition, the third frame portion F3 and the fourth frame portion F4 can further suppress deformation of the first frame portion F1 and the second frame portion F2 so as to expand to the left and right when the airbag 11 is deployed.

In addition, since the third frame portion F3 is connected to the side plate portion 210 of the second frame portion F2 behind the reinforcing convex portion 217, the third frame portion F3 is connected near the portion of the side plate portion 210 having high rigidity. Thereby, the rigidity of the base member BA can be further improved.

Further, since the first wire 21 integrally has the first wire side portion 21A forming the first frame portion F1 and the first wire lower portion 21B forming the third frame portion F3, it is not necessary to connect the first frame portion F1 and the third frame portion F3 by welding or the like. Thereby, the manufacturing man-hours of the base member BA can be reduced.

Further, since the first wire lower portion 21B of the first wire 21 is joined to the lower surface of the lower plate portion 220 of the second bracket 200, the third frame portion F3 can be composed of the first wire lower portion 21B of the first wire 21 and the lower plate portion 220 of the second bracket 200. Thereby, the rigidity of the third frame portion F3 can be improved, and the rigidity of the base member BA can be further improved.

In addition, since the base member BA has the side plate portion 210 that holds the shape of the seat S side of the side airbag device 1, the side plate portion 210 can hold a fine shape that is difficult to hold with a frame made of a metal rod. As a result, the shape of the side airbag device 1 on the side of the seat S can be clearly displayed, and the appearance of the side airbag device 1 can be improved.

Further, according to the mounting structure of the side airbag device 1 according to the present embodiment, since the second bracket 200 has the positioning portion 230 that can be engaged with the base bracket 360 fixed to the vehicle body, by fixing the second bracket 200 to the vehicle body while the positioning portion 230 of the second bracket 200 is engaged with the base bracket 360, it is possible to reduce the mounting error when the side airbag device 1 is mounted to the vehicle body.

Moreover, since the positioning portion 230 protrudes from the side plate portion 210 of the second bracket 200 , a space can be secured between the side plate portion 210 of the second bracket 200 and the base bracket 360 . Thereby, it is possible to suppress contact between the side plate portion 210 of the second bracket 200 and the base bracket 360 .

Further, since the positioning portion 230 can be engaged with the bracket engaging portion 362 projecting from the base portion 361 of the base bracket 360, a space can be secured between the side plate portion 210 of the second bracket 200 and the base portion 361 of the base bracket 360. Thereby, it is possible to suppress contact between the side plate portion 210 of the second bracket 200 and the base portion 361 of the base bracket 360 .

In addition, since the positioning portion 230 can engage with the bracket engaging portion 362 formed by bending a part of the metal plate that constitutes the base bracket 360, compared with the case where the bracket engaging portion is attached to the main body portion of the base bracket, the positional error of the bracket engaging portion 362 with respect to the vehicle body can be suppressed. As a result, mounting errors when mounting the side airbag device 1 to the vehicle body can be further reduced.

Further, since the second bracket 200 is fixed to the airbag fixing portion 364 of the bracket engaging portion 362 at a position behind the positioning portion 230, it is possible to suppress positional deviation between the fixed portions of the second bracket 200 and the base bracket 360. As a result, mounting errors when mounting the side airbag device 1 to the vehicle body can be further reduced.

Further, since the first bracket 100 has the insertion hole 172 through which the positioning portion 230 of the second bracket 200 passes, the positioning portion 230 of the second bracket 200 fixed to the vehicle body can be directly engaged with the base bracket 360 even in a configuration having the first bracket 100 disposed between the second bracket 200 and the vehicle body. As a result, mounting errors when mounting the side airbag device 1 to the vehicle body can be reduced.

Also, since the first bracket 100 and the second bracket 200 are fastened together to the base bracket 360 by the bolts 92B, the number of parts and the number of assembly steps of the side airbag device 1 can be reduced. Similarly, since the first bracket 100 and the second bracket 200 are fastened together to the airbag mounting bracket 340 by the bolts 93B, the number of parts and the number of assembly steps of the side airbag device 1 can be reduced.

Further, since the positioning part 230 projecting from the side plate part 210 of the second bracket 200 is arranged behind the airbag module 10, the airbag 11 can be prevented from coming into contact with the positioning part 230 when the airbag 11 is deployed.

Further, since the second bracket 200 is fastened to the nut 92N fixed to the base bracket 360 by the bolt 92B, the bolt 92B can be fastened to the nut 92N through the first bracket 100 from the inside of the vehicle body. As a result, the work of attaching the side airbag device 1 to the vehicle body can be simplified.

Further, the second bracket 200 has the first vehicle body fixing portion 270 and the second vehicle body fixing portion 250 arranged below the first vehicle body fixing portion 270, and the positioning portion 230 can contact the base bracket 360 in the front and rear. The vehicle body fixing portion 250 can be permanently fixed to the vehicle body. As a result, mounting errors when mounting the side airbag device 1 to the vehicle body can be further reduced.

Moreover, since the burrs BR of the brackets 100, 200 face the side opposite to the side where the airbag module 10 is arranged, the contact of the airbag 11 with the burrs BR of the brackets 100, 200 can be suppressed with a simple structure when the airbag 11 is deployed.

Moreover, since the pad 70 covers the portion of the second bracket 200 where the burr BR is formed, it is possible to further suppress the contact of the airbag 11 with the burr BR of the second bracket 200 when the airbag 11 is deployed.

Further, since the first webbing attachment portion 41 of the first attachment wire 40 is arranged at a position that does not overlap the first bracket 100 when viewed in the left-right direction, the portion of the second webbing 32 attached to the first attachment wire 40 can be prevented from coming into contact with the burrs BR on the outer peripheral portion of the first bracket 100.

Further, since the second bracket 200 has the bent portion 218 bent to the side opposite to the side on which the airbag module 10 is arranged, the contact of the airbag 11 with the burrs BR on the outer peripheral portion of the second bracket 200 can be further suppressed when the airbag 11 is deployed.

In addition, since the welded portions W1 and W2 between the wire frame 20 and the second bracket 200 are located on the opposite side of the second bracket 200 to the side on which the airbag module 10 is arranged, the airbag 11 can be prevented from coming into contact with the welded portions W1 and W2 between the wire frame 20 and the second bracket 200 when the airbag 11 is deployed.

Moreover, since the brackets 100 and 200 are arranged at positions overlapping the airbag module 10 when viewed from the left and right direction, the airbag module 10 can be protected by the brackets 100 and 200 .

In addition, since the first webbing 31 is arranged to pass between the airbag module 10 and the vehicle body, the first webbing 31 can prevent the airbag 11 from coming into contact with the vehicle body.

Further, since the skin fixing part 81B of the hook 81 for fixing the skin member 80 to the wire frame 20 extends toward the side opposite to the side where the airbag module 10 is arranged, the airbag 11 can be prevented from coming into contact with the skin fixing part 81B when the airbag 11 is deployed.

Although one embodiment of the invention has been described above, the invention is not limited to the above embodiment, and can be modified as appropriate.
For example, in the above-described embodiment, the side surfaces F11 and F12 of the projection 75 are flush with the inner surfaces F21 and 22 of the slit 71A, but there may be some steps between the side surfaces of the projection and the inner surface of the slit.

In the above-described embodiment, the convex portion 75 is provided at the center portion in the vertical direction away from the upper and lower ends of the slit 71A, but the convex portion may be provided at the upper end portion of the slit or at the lower end portion of the slit.

In the above-described embodiment, only one first protrusion 75A is provided on the left and right outer sides of the slit 71A, but a plurality of first protrusions may be provided on the left and right outer sides of the slit. Further, when a plurality of first protrusions are provided, the first protrusions may be arranged vertically or horizontally. The same applies to the second convex portion. Further, in the above-described embodiment, the protrusions 75 are provided on both the left and right sides of the slit 71A, but the pad may be configured such that the protrusions are provided only on one side of the slit in the left-right direction.

In the above embodiment, the frame member is the wire frame 20 made of metal rods, but the frame member may be a plate-like frame made of a metal plate. Also, the frame member may be a frame integrated by welding a plate-shaped frame to a wire frame.

In the above embodiment, the wire engaging portion 61A as the engaging portion provided on the first bracket 100 is formed by the fixed wire 60 fixed to the first bracket 100, but the engaging portion may be provided directly on the first bracket. In other words, in the above embodiment, the attached portion provided on the first bracket 100 was the fixed wire 60 fixed to the first bracket 100, but the attached portion may be directly provided on the first bracket. In the above-described embodiment, the attachment wires 40 and 50 as attachment members are attached to the common fixed wire 60 (attachment portion), but the attachment portion may be provided separately for each attachment member. That is, there may be a plurality of attached portions.

In the above-described embodiment, the first attachment wire 40 has the position P41 of the vertical center of the first webbing attachment portion 41 shifted downward from the position P1 of the vertical center of the two upper and lower first hooking portions 42, but may be shifted upward. In the above-described embodiment, the projecting portion 45 of the first attachment wire 40 projects downward and the harness 400 extends upward from the upper end of the inflator 12, but the projecting portion may project upward and the harness may extend downward from the lower end of the inflator.

In the above-described embodiment, the second mounting wire 50 has a vertical center position P51 of the second webbing mounting portion 51 that is displaced upward from a vertical center position P1 of the two upper and lower second hooking portions 52, but the second mounting wire 50 may be shifted downward. In the above-described embodiment, the second attachment wire 50 has the upper projecting portion 55 projecting more than the lower projecting portion 56, but the lower projecting portion may project more than the upper projecting portion.

In the above-described embodiment, the first mounting wire 40 and the second mounting wire 50 are such that the vertical center positions P41 and P51 of the webbing mounting portions 41 and 51 are displaced in different vertical directions with respect to the vertical center position P1 of the two upper and lower hooking portions 42 and 52 (bracket mounting portions), but they may be shifted in the same direction.

In the above embodiment, the second mounting wire 50 is exemplified as the outer mounting member and the first mounting member, and the first mounting wire 40 is exemplified as the inner mounting member and the second mounting member. Alternatively, the mounting member may be a plate-shaped mounting member formed by bending a metal plate, for example. If the mounting member is plate-shaped, for example, the webbing mounting portion is a portion formed with an insertion hole through which the webbing is inserted, and the bracket mounting portion is a portion fixed to the first bracket by fastening, welding, or the like.

In the above-described embodiment, two upper and lower hooking portions 42 and 52 are illustrated as bracket mounting portions, but the number of bracket mounting portions may be one or three or more. When there is one bracket attachment portion, the vertical center position of the bracket attachment portion is the vertical center position of the bracket attachment portion. When there are three or more bracket mounting portions, the vertical center position of the bracket mounting portion is the vertical center position between the highest bracket mounting portion and the lowest bracket mounting portion.

In the above embodiment, the side airbag device 1 includes two attachment members, the first attachment wire 40 as an inner attachment member and the second attachment wire 50 as an outer attachment member, but may include three or more attachment members including an inner attachment member and an outer attachment member. Also, the side airbag device may be configured to include only one mounting member.

In the above embodiment, the upper bolt 12B of the two bolts 12B of the inflator 12 is positioned above the loop portion 30A, but both of the two bolts 12B are above the loop portion 30A, that is, in the longitudinal direction of the inflator 12. It may be positioned at a different position from the second webbing lower portion 32B.

In the above-described embodiment, the loop portion 30A is located at the bottom of the webbing 30, and the airbag module 10 is inserted downward through the upper opening of the loop portion 30A. Alternatively, the airbag module may be inserted into the loop portion from below. For example, the loop portion may be on the upper portion of the webbing. Also, the webbing may be configured without the loop portion.

In the above-described embodiment, the side airbag device 1 includes two webbings, the first webbing 31 as the outer webbing and the second webbing 32 as the inner webbing, but may include three or more webbings including the outer webbing and the inner webbing. Also, the side airbag device may be configured to include only one webbing.

In the above embodiment, the hook 35 is used as the fixing member, but the fixing member may be a snap button or the like. Furthermore, it is not necessary to provide a fixing member.

In the above embodiment, the third portion 430 of the harness 400 was fixed to the first bracket 100 via the connector 471, but the third portion may be fixed to the side of the first bracket on which the airbag module is arranged by a clip or the like.

In the above embodiment, both the first end 411 and the second end 412 of the first portion 410 of the harness 400 are fixed to the first bracket 100, but only one end of the first portion may be fixed to the first bracket. Alternatively, the portion between both ends may be fixed to the first bracket.

In the above embodiment, the front extension portion 22D (second extension portion) of the second wire 22 overlaps the front frame portion 21D (first extension portion) of the first wire 21 when viewed from the front side, but the second extension portion may be configured so as not to overlap the first extension portion when viewed from the front side.

In the above-described embodiment, the second wire 22 is fixed to the first wire 21 at one point (bent convex portion 22G) between two adjacent skin attachment portions 22F, but the second wire may be fixed to the first wire at multiple locations between two adjacent skin attachment portions.

In the above-described embodiment, the skin member 80 has a configuration in which the third cover portion 531 covers the left and right outer sides and the rear side of the airbag module 10, but both the third cover portion and the fourth cover portion may cover the airbag module. For example, the third cover portion may cover the left and right outer sides of the airbag module, and the fourth cover portion may cover the rear side of the airbag module. Further, the skin member may have a configuration in which the third cover portion and the fourth cover portion are not provided. Moreover, the structure which does not have a plate member and a cloth-like member may be sufficient.

In the above-described embodiment, two openings 517A and 517B are provided in the vehicle body fixing portions 250 and 270 of the base member BA and the inner cover portion 511 of the first skin member 510. However, the number of the vehicle fixing portions and openings may be one, or three or more.

In the above-described embodiment, the inner cover portion 511 (first cover portion) is configured to expose both a portion of the base member BA and a portion of the pad 70. However, the first cover portion may be configured to expose only a portion of the base member BA such as the vehicle body fixing portion without exposing the pad, or may be configured to expose only a portion of the pad 70 without exposing the base member. Further, the first cover portion may be configured without the slit hole 518 when the surface of the pad on the seat side is a flat surface without ridges.

In the above-described embodiment, the fastener of the outer skin member 80 was the line fastener 550, but the fastener may be a snap button, hook-and-loop fastener, or the like. In the above-described embodiment, the wire fastener 550 (fastener) is arranged along the rear edge of the inner surface 1S of the side airbag device 1, but the fastener may be arranged along the front edge of the inner surface where the airbag deploys. The fasteners may also be located between the front and rear ends of the inner surface.

In the above embodiment, the first clip 440 was fixed to the first bracket 100 via the retaining plate 13, but the first clip 440 may be fixed directly to the first bracket 100 in the same manner as the other clips 450-470. Also, the clips 450 to 470 may be fixed to the first bracket 100 via other members.

In the above embodiment, the harness fixing member includes the first clip 440 as the fourth fixing member, the second clip 450 and the third clip 460 as the first fixing member and the second fixing member, and the fourth clip 470 as the third fixing member, but the number of harness fixing members is arbitrary.

In the above-described embodiment, the second frame portion F2 has the side plate portion 210, which is a plate-like portion, and the side plate portion 210 has the lower end projecting portion 216 and the reinforcing convex portion 217. Instead of the second frame portion, the first frame portion may have a plate-like portion. Moreover, both the first frame portion and the second frame portion of the frame may have plate-like portions.

In the above-described embodiment, the second frame portion F2 and the third frame portion F3 are composed of the second bracket 200 (plate-shaped frame) made of a metal plate and the wire frame 20 made of a metal rod. Similarly, in the above-described embodiment, the first frame portion F1 and the fourth frame portion F4 are composed only of the wire frame 20, but for example, they may be composed of only the plate-like frame, or may be composed of the wire frame and the plate-like frame. Also, the frame may be configured without the fourth frame portion.

In the above-described embodiment, the positioning portion 230 of the second bracket 200 can contact the bracket engaging surface 364A of the base bracket 360 from the front, but the positioning portion may contact the base bracket from the rear.

In the above embodiment, the positioning portion 230 protrudes from the main body portion of the second bracket 200 and is configured to be able to contact the bracket engaging surface 364A formed in the base bracket 360. However, for example, the positioning portion may be configured to be engageable with a hole formed in the base bracket. Also, the positioning portion may be, for example, a surface or a hole with which a portion protruding from the main body of the base bracket can be engaged instead of the portion protruding from the main body of the second bracket.

In the above embodiment, the first bracket 100 (second fixed bracket) having the insertion hole 172 through which the positioning portion 230 passes is arranged between the second bracket 200 and the vehicle body, but the second fixed bracket may be omitted.

In the above-described embodiment, the bent portion 218 is provided at only one location at the front end portion of the lower end portion 210C of the second bracket 200, but the bent portion may be provided at a plurality of locations. Moreover, the structure which does not have a bending part may be sufficient.

In the above embodiment, the pad 70 partially covers the portion of the second bracket 200 where the flash BR is formed, but the pad may be provided so as to cover substantially the entire portion of the second bracket where the flash BR is formed.

In the above-described embodiment, the bracket has two members, the first bracket 100 and the second bracket 200, but the bracket may have one member or three or more members.

In the above embodiment, the side airbag device 1 is fixed to the vehicle body separately from the seat back portion that can be tilted forward, but it may be configured as part of the seat back portion that can be tilted forward or backward.

In the above embodiment, the side airbag device 1 is arranged between the seat back S2 and the side wall BS of the vehicle body, but the side airbag device may be arranged between the seat cushion and the vehicle body. In this case, the side airbag device may expose the inner surface when the seat cushion (seat) is slid forward and backward.

Further, in the above-described embodiment, an example in which the side airbag device is applied to the rear seat of the automobile has been described, but it may be applied to the front seat or the center seat of the third row of the automobile, for example.

Moreover, each element described in the above-described embodiment and modifications can be implemented in combination as appropriate.

1 side airbag device 1S inner surface 2 case 10 airbag module 11 airbag 12 inflator 12C central axis 21 first wire 21A first wire side portion 21B first wire lower portion 70 pad 80 skin member 200 second bracket 210 side plate portion 216 lower end projection portion 217 reinforcing convex portion 220 lower plate portion 400 harness B A Base member F1 First frame part F2 Second frame part F3 Third frame part F4 Fourth frame part L1 First straight line L2 Second straight line S Seat

Claims (10)

A side airbag device comprising: an airbag module having an airbag and an inflator for supplying gas into the airbag; and a case accommodating the airbag module,
The case includes a frame, a pad covering the frame, and a skin member covering the frame and the pad,
The frame has a first frame portion positioned on one of left and right sides of the airbag module, a second frame portion positioned on the other left and right side of the airbag module, and a third frame portion positioned below the airbag module and connecting the first frame portion and the second frame portion,
A side airbag device, wherein the third frame portion is arranged behind a front end of the airbag and ahead of a rear end of the inflator. 2. The side airbag device according to claim 1, wherein the third frame portion is arranged in front of the central axis of the inflator. 3. The side airbag device according to claim 1, wherein the frame has a fourth frame portion located above the airbag module and in front of the central axis of the inflator and connecting the first frame portion and the second frame portion. at least one of the first frame portion and the second frame portion has a first plate-shaped portion;
The first plate-shaped part has a reinforcing convex part that is convex in one of the left and right directions,
The side airbag device according to any one of claims 1 to 3, wherein the third frame portion is connected to the first plate-like portion behind the reinforcing convex portion. The frame has a first wire frame made of metal bars,
The side airbag device according to any one of claims 1 to 4, wherein the first wire frame has a wire side portion that constitutes the first frame portion, and a wire lower portion that is bent from a lower end of the wire side portion and extends left and right to constitute the third frame portion. The frame has a plate-shaped frame made of a metal plate,
The plate-shaped frame has a side plate portion that forms the second frame portion, and a lower plate portion that bends from a lower end of the side plate portion and extends left and right to form the third frame portion,
6. The side airbag device according to claim 5, wherein the wire lower portion is joined to the lower surface of the lower plate portion. a harness disposed in the case and having one end connected to the inflator;
7. The side airbag device according to any one of claims 1 to 6, wherein the third frame portion is disposed between a first straight line along the longitudinal direction of the inflator passing through the front end of the harness and a second straight line along the longitudinal direction of the inflator passing through the rear end of the harness when viewed from the left-right direction. 8. The side airbag device according to any one of claims 1 to 7, wherein the side airbag device is fixed to the vehicle body and arranged between the vehicle body and the seat, and a surface on the side of the seat is exposed when the seat is moved. 9. The side airbag device according to claim 8, wherein the frame has a second plate-like portion that retains the shape of the side airbag device on the seat side. at least one of the first frame portion and the second frame portion has a third plate-shaped portion;
The third plate-shaped part has a lower end protruding part that protrudes downward from the other part at the lower end,
The side airbag device according to any one of claims 1 to 9, wherein the third frame portion is connected to the lower end portion of the third plate-like portion behind the lower end projecting portion.

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