Car seats

Abstract

The invention improves the operability when installing an airbag module arranged on the side of a vehicle seat from the rear side of the seat. The vehicle seat (S) comprises a side frame (13) constituting a side of a seat back frame (10); a bracket (20) and an airbag module (30); the side frame (13) constituting a side of a seat back frame (10); the bracket (20) comprising a mounting portion (21) mounted on the side of the seat inner side of the side frame (13) and a rear protruding portion (22) protruding rearward from the mounting portion (21); and the airbag module (30) comprising a retaining ring (34) fixed to the rear protruding portion (22).

Description

[0001] This application is a divisional application of patent application No. 201780065982.4 (PCT / JP2017 / 035150). Technical Field

[0002] The present invention relates to a vehicle seat provided with an airbag at a side portion. Background Art

[0003] A vehicle seat equipped with a side airbag device that inflates and deploys an airbag provided on a side portion of the vehicle seat to protect a passenger when the vehicle is hit from the side is known (for example, see Patent Document 1 below).

[0004] Patent Document 1: Patent Publication No. 5669567 Summary of the invention

[0005] In the above-mentioned prior art, the airbag module is mounted on a bracket extending from the side frame to the front of the seat. Therefore, the operability when the airbag module is mounted from the rear side of the seat relative to the seat frame is low.

[0006] The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle seat having improved operability when installing an air bag module disposed on a side portion of the vehicle seat from the rear side of the seat.

[0007] The above-mentioned problem is solved by the following method. According to the vehicle seat of the present invention, it comprises a side frame, a bracket and an airbag module, wherein the side frame constitutes a side portion of a seat back frame; the bracket comprises a mounting portion mounted on a side surface of the seat inner side of the side frame and a rear protrusion protruding rearward from the mounting portion; and the airbag module is fixed relative to the rear protrusion.

[0008] According to the vehicle seat, since the bracket for mounting the airbag module is mounted on the inner side surface of the side frame, the width of the mounting portion of the airbag module in the left-right direction becomes compact. Furthermore, since the airbag module is mounted further rearward than the mounting portion of the bracket and the side frame, the operability when assembling the airbag module to the bracket from the rear of the seat can be improved.

[0009] In the vehicle seat, the side frame preferably includes a cylindrical pipe frame and a plate-like panel frame attached to a lower portion of the pipe frame, and the airbag module is attached to a side surface of the panel frame on an outer side of the seat.

[0010] Thus, the airbag module can be simultaneously mounted on the bracket and the outer side surface of the panel frame. Thus, the airbag module can be more firmly mounted on the seat cushion frame than when the airbag module is mounted on either the bracket or the panel frame.

[0011] In the above vehicle seat, it is preferable that the bracket is attached to the tubular frame at a position below a joint between the tubular frame and the plate frame.

[0012] Thus, by installing the bracket below the joint portion between the tubular frame and the plate frame in the side frame, that is, in a portion that does not overlap the joint portion, the rigidity of the side frame can be suppressed from increasing. Thus, even when the bracket is installed, the appropriate impact absorption of the side frame can be maintained.

[0013] In the above vehicle seat, preferably, the rear protruding portion includes a rear extension portion extending rearward from the mounting portion and an outer extension portion extending from the rear extension portion to an outer side of the seat, and the airbag module is mounted on the outer extension portion.

[0014] This allows the portion of the bracket mounted on the pipe frame to be oriented differently from the portion mounted on the airbag module. This prevents interference between the mounting positions of the bracket and the pipe frame and between the bracket and the airbag module, thereby improving mounting workability.

[0015] In addition, in the above-mentioned vehicle seat, it is preferred that the airbag module has an airbag, an inflator that supplies gas to the airbag, a container box covering the inflator and the airbag, and a guard ring having a protrusion protruding from the container box, and the outer extension portion of the bracket is fixed to the protrusion of the guard ring.

[0016] This makes it possible to fix the retainer and the bracket protruding from the airbag module. This improves the workability of mounting the airbag module on the bracket.

[0017] In the vehicle seat, the outer extending portion of the bracket and the protruding portion of the retainer are preferably fixed to bolts passing through the outer extending portion and the protruding portion of the retainer by tightening nuts, and an opening through which the bolt is inserted is formed in the protruding portion of the retainer.

[0018] Thus, the retainer and the bracket of the airbag can be easily fixed using bolts and nuts. According to this, the mounting operation of the airbag module to the bracket can be made easier.

[0019] In the vehicle seat, preferably, the protruding portion of the retainer includes an inner extension portion extending inwardly of the seat behind the side frame, and the inner extension portion is fixed to the outer extension portion.

[0020] Thus, the retainer and the bracket of the airbag module can be easily fixed from behind the seat using bolts and nuts. Accordingly, the installation operation of the airbag module to the bracket can be made easier.

[0021] In the above vehicle seat, preferably, an end of the bolt faces rearward, and the nut is a cap nut covering the end of the bolt.

[0022] This makes it easier to tighten the nut onto the bolt from behind the seat.

[0023] Furthermore, since the end of the bolt is covered by the cap nut, it is possible to suppress damage to the interior of the seat by the end of the bolt.

[0024] In the above vehicle seat, it is preferable that the opening of the retainer is provided through an end portion on the inner side of the seat.

[0025] Thus, the bolt can be inserted into the opening provided in the retainer from the outside of the seat. This facilitates the work of mounting the airbag module on the bracket.

[0026] In the vehicle seat, it is preferable to include a seat back pad covering the seat back frame, wherein a side portion of the seat back pad has a storage portion that opens toward the outside of the seat and stores the air bag module.

[0027] Thus, even after the seat back pad is mounted on the seat back frame, the airbag module can be arranged and mounted in the storage portion of the seat back pad. Thus, since the airbag module can be mounted after the seat back pad is mounted on the seat back frame, the position of the airbag module does not shift when the seat back pad is mounted. Thus, the positioning accuracy of the airbag module can be improved.

[0028] According to the present invention, it is possible to improve the workability when installing an air bag module arranged on the side of a vehicle seat from the rear side of the seat.

[0029] According to one aspect of the present invention, it is possible to more firmly attach the airbag module to the seat cushion frame.

[0030] According to one aspect of the present invention, even when the bracket is attached, the side frame can maintain appropriate impact absorption performance.

[0031] According to one aspect of the present invention, interference between the mounting positions of the bracket and the pipe frame and between the bracket and the airbag module can be suppressed, thereby improving mounting workability.

[0032] According to one aspect of the present invention, the workability of mounting the air bag module to the bracket can be improved.

[0033] According to one aspect of the present invention, the retainer and the bracket of the airbag module can be easily fixed using bolts and nuts.

[0034] According to one aspect of the present invention, the retainer and the bracket of the airbag module can be easily fixed from behind the seat using bolts and nuts.

[0035] According to one aspect of the present invention, it is possible to suppress damage to the interior of the seat by the end portion of the bolt.

[0036] According to one aspect of the present invention, the bolt can be inserted into the opening portion provided in the retainer from the outside of the seat.

[0037] According to one aspect of the present invention, even after the seat back pad is mounted on the seat back frame, the air bag module can be arranged and mounted in the storage portion of the seat back pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a perspective view of the vehicle seat according to the present embodiment.

[0039] Figure 2 It is a three-dimensional view of the seat back frame.

[0040] Figure 3 It is a right side view of the seat back frame.

[0041] Figure 4 It is a left side view of the seat back frame.

[0042] Figure 5 This is an enlarged view of the installation position of the air bag module on the tubular frame.

[0043] Figure 6 yes Figure 5 VI-VI cross-sectional view.

[0044] Figure 7 yes Figure 5 VII-VII cross-section diagram.

[0045] Figure 8 This is an enlarged view of the mounting portion of the air bag module to the panel frame.

[0046] Fig. 9 yes Figure 1 IX-IX cross-section diagram.

[0047] Fig.10 It is a perspective view showing a modified example in which the arrangement of the inflator in the seat back frame is changed.

[0048] Fig.11 It is a right side view of the seat back frame.

[0049] Fig.12 It is a three-dimensional diagram of the retaining ring.

[0050] Fig.13 It is a three-dimensional view of the seat back frame.

[0051] Fig.14 This is an enlarged view of the installation position of the air bag module on the tubular frame.

[0052] Fig.15 yes Fig.14 XV-XV section view of FIG.

[0053] Fig.16 yes Fig.14 Section XVI-XVI of FIG.

[0054] Fig.17 It is a three-dimensional diagram of the retaining ring.

[0055] Fig.18 It is an enlarged view of a mounting position of an air bag module on a tubular frame in a vehicle seat according to a modified example of the present invention. DETAILED DESCRIPTION 1

[0057] Below, refer to Figures 1 to 10 A vehicle seat S according to a mode for carrying out the present invention (hereinafter referred to as the present embodiment) will be described. The vehicle seat S according to the present embodiment is a vehicle seat equipped with an airbag device at a side portion.

[0058] In addition, the following embodiments are only an example to make the present invention easy to understand, and are not intended to limit the present invention. That is, the shapes, sizes, configurations, etc. of the components described below do not depart from the gist of the present invention, and while changing and improving, it is undoubted that the present invention includes its equivalents.

[0059] In the following description, the “front-rear direction” refers to the front-rear direction when viewed from the seated person of the vehicle seat S, and is a direction that coincides with the traveling direction of the vehicle.

[0060] The “seat width direction” refers to the lateral width direction of the vehicle seat S, and coincides with the left-right direction when viewed from a seated person of the vehicle seat S.

[0061] In addition, the “up-down direction” indicates the height direction of the vehicle seat S, and corresponds to the up-down direction when the vehicle seat S is viewed from the front.

[0062] The structure of the vehicle seat S.

[0063] like Figure 1 As shown, the vehicle seat S includes a seat back S1 as a backrest portion, a seat cushion S2 as a seating portion, and a headrest S3 disposed on an upper portion of the seat back S1 for supporting a passenger's head.

[0064] The seat back S1 is a seat back cushion 1 covering the Figure 2 The seat back cushion 1 is formed by covering a seat back frame 10 as a frame with a skin 2 .

[0065] An airbag module 30 and an airbag module 40 are respectively provided inside the side of the seat back S1 .

[0066] In the present embodiment, the airbag module 40 is closer to the vehicle door than the airbag module 30. That is, the airbag module 30 is a far-side airbag device, and the airbag 40 is a near-side airbag device.

[0067] Furthermore, the airbag module 30 as a far-side airbag device protects a passenger of the vehicle seat S from a collision with a passenger sitting in an adjacent seat.

[0068] In addition, the airbag module 40 as a near-side airbag device protects a passenger of the vehicle seat S from a collision with a vehicle door or the outside of the vehicle.

[0069] In this embodiment, an example is described in which an airbag module 30 as a far-side airbag device is provided on the right side of the vehicle seat S, and an airbag module 40 as a near-side airbag device is provided on the left side, but the configuration of the two is determined according to the configuration of the vehicle seat S in the vehicle and is not limited to the above example. Configuration of the seat back S1.

[0070] Next, refer to Figures 2 to 9 , the structure of the seat back S1 will be described.

[0071] exist Figure 2 2 is a perspective view of a seat back frame 10 serving as a framework of the seat back S1.

[0072] like Figure 2 As shown, the seat back frame 10 includes an inverted U-shaped pipe frame 11 , a pair of plate frames 12 constituting the ends in the seat width direction, and a lower frame 15 spanned between the lower ends of the pair of plate frames 12 .

[0073] The side portion 11A of the tubular frame 11 and the upper end portion of the plate frame 12 are arranged to overlap each other in the vertical direction and are joined to each other at a welding location including a welding portion 50A and a welding portion 50B.

[0074] In the present embodiment, a side portion of the seat back frame 10 formed of the side portion 11A of the pipe frame 11 and the plate frame 12 is referred to as a side frame 13 .

[0075] The seat back frame 10 is provided with a cross member 14 that bridges the upper portion of the pipe frame 11 (that is, the portion above the side portion 11A).

[0076] The airbag module 30 is mounted on the right side frame 13 via the bracket 20. The airbag module 30 is mounted on the right side frame 13 via the bracket 20. In addition, the bracket 20 is provided below the welded portion 50A and the welded portion 50B which are the joints of the pipe frame 11 and the plate frame 12, and the rigidity of the joints is suppressed to be strengthened more than necessary. Thus, the impact absorption of the seat back frame 10 is not hindered by the mounting of the bracket 20 and the airbag module 30.

[0077] The air bag module 30 is mounted in a structure.

[0078] The following is a structure for mounting the airbag module 30 on the bracket 20. Figure 3 , Figures 5 to 9 A detailed description will be given.

[0079] like Figure 5 and Figure 6 As shown, a through hole 11B and a through hole 11C arranged vertically are formed on the side surface of the side portion 11A of the right tubular frame 11 on the inner side of the seat.

[0080] Here, the bracket 20 includes a mounting portion 21 mounted in the through hole 11C of the pipe frame 11, and a rear protruding portion 22 protruding rearward from the mounting portion 21. The rear protruding portion 22 is composed of a rear extension portion 22A extending from the mounting portion 21 to the rear of the seat, and an outer extension portion 22B extending from the rear extension portion 22A to the outer side of the seat.

[0081] The bracket 20 is fixed to the pipe frame 11 by fastening the screw 23 through the through hole formed in the mounting portion 21 of the bracket 20 and the through hole 11C formed in the bracket 20 .

[0082] like Figure 3 , Figure 5 and Figure 7 As shown, the airbag module 30 includes an airbag 31 , an inflator 32 , and a retainer 34 inside a container box 33 .

[0083] The inflator 32 generates gas when receiving an operation signal input from a sensor that senses a vehicle impact through the harness 35. The inflator 32 injects the generated gas into the airbag 31 to inflate and deploy the airbag 31.

[0084] The retainer 34 is a plate-shaped member for attaching the airbag module 30 to the seat back frame 10 . The retainer 34 includes a flat plate portion 34D facing the outer side surface 12A of the panel frame 12 and a protruding portion 34A protruding from the container box 33 .

[0085] like Figure 8 As shown, stud bolts 36A and 36B provided on the inflator 32 protrude toward the inner side of the seat through the flat plate portion 34D of the retainer 34. The stud bolts 36A and 36B pass through through holes formed in the panel frame 12, respectively.

[0086] Then, by tightening nuts to the stud bolts 36A from the seat inner side of the panel frame 12 , the inflator 32 , the retainer 34 , and the panel frame 12 are fixed.

[0087] On the other hand, the inflator 32 is fixed to the retainer 34 by tightening the nut 37 on the stud 36B. In addition, the diameter of the through hole of the plate frame 12 through which the stud 36B passes is larger than the diameter of the nut 37, so the retainer 34 and the plate frame 12 are not fixed in this portion.

[0088] In addition, a fabric clamp 60 for fixing the fabric is mounted on the panel frame 12 at a position sandwiching the stud bolts 36A and 36B. Here, the fabric is a member for guiding the deployment direction of the airbag 31 by covering the side of the airbag module 30.

[0089] like Figure 5 As shown, the protrusion 34A of the retainer 34 is mounted with the outer extension 22B of the bracket 20 .

[0090] Specifically, if Figure 5 and Figure 7 As shown, the protruding portion 34A has an inner extension portion 34B extending toward the inner side of the seat, and the inner extension portion 34B is formed with an opening portion 34C from the center thereof to the inner end portion of the seat.

[0091] Then, the bolt 24 is passed through the through hole and the opening 34C formed in the outer extension portion 22B of the bracket 20, and the cap nut 25 is fitted and fastened to the end 24A of the bolt 24. Thus, the bracket 20 and the retainer 34 are fixed.

[0092] According to the above configuration, the end 24A of the bolt 24 faces the rear of the seat and can be fitted into the cap nut 25 from the rear. Also, since the end 24A of the bolt 24 is covered by the cap nut 25, the end 24A of the bolt 24 can be prevented from damaging the interior of the seat back S1.

[0093] like Fig. 9 As shown, in the seat back pad 1 of the seat back S1, a storage portion 1A is provided which penetrates the pad member at the side portion on the side where the air bag module 30 is arranged. The air bag module 30 is arranged in this storage portion 1A.

[0094] In this way, by providing the storage portion 1A for arranging the airbag module 30 in the seat back pad 1, the airbag module 30 can be mounted on the seat back frame 10 after the seat back pad 1 is assembled to the seat back frame 10 in the seat back S1. Therefore, compared with the case where the seat back pad 1 is covered on the seat back frame 10 after the airbag module 30 is mounted on the seat back frame 10, positional displacement of the airbag module 30 can be suppressed.

[0095] Next, the mounting structure of the airbag module 40 with respect to the seat back frame 10 will be described. The airbag module 40 is mounted facing the outer side of the side panel 41 of the side frame 13 mounted on the left side of the seat back frame 10 .

[0096] like Fig. 9 As shown, the side plate 41 is fixed to the tubular frame 11 by tightening the screws 42 through the through holes on the inner side of the seat of the tubular frame 11 and the through holes provided in the side plate 41 .

[0097] In addition, if Figure 4 As shown, the upper end of the airbag module 30 is located higher than the upper end of the side plate 41 to which the airbag module 40 is mounted. That is, the upper end of the airbag module 30 is located at a higher position than the upper end of the airbag module 40.

[0098] According to the vehicle seat S described above, since the bracket 20 for mounting the airbag module 30 is mounted on the inner side surface of the side frame 13, the width in the left-right direction of the mounting portion of the airbag module 30 becomes compact. Furthermore, since the airbag module 30 is mounted further to the rear of the seat than the mounting portion of the bracket 20 and the side frame 13, the operability when assembling the airbag module 30 to the bracket 20 from the rear of the seat can be improved.

[0099] Furthermore, according to the vehicle seat S, the airbag module 30 can be simultaneously mounted on the bracket 20 and the outer side surface 12A of the panel frame 12. This allows the airbag module 30 to be mounted more firmly than when it is mounted on either the bracket 20 or the panel frame 12.

[0100] In addition, according to the vehicle seat S, the rigidity of the side frame 13 can be suppressed from being increased by installing the bracket 20 below the joint portion (weld portion 50A, weld portion 50B) between the pipe frame 11 and the plate frame 12 in the side frame 13, that is, at a position that does not overlap with the joint portion. Thus, even when the bracket 20 is installed, the appropriate impact absorption of the side frame 13 can be maintained.

[0101] In addition, according to the vehicle seat S, the portion of the bracket 20 mounted on the tubular frame 11 and the portion mounted on the airbag module 30 can be oriented differently. This can suppress interference between the mounting positions of the bracket 20 and the tubular frame 11 and between the bracket 20 and the airbag module 30, thereby improving mounting workability.

[0102] Furthermore, according to the vehicle seat S, the retainer 34 of the air bag module 30 and the bracket 20 can be easily mounted from the rear of the seat using the bolts 24 and the cap nuts 25 .

[0103] Furthermore, since the end portion 24A of the bolt 24 is covered by the cap nut 25 , it is possible to suppress damage to the seat back pad 1 by the end portion 24A of the bolt 24 .

[0104] Furthermore, according to the vehicle seat S, the bolts 24 can be fitted into the opening 34C of the retainer 34 from the seat outer side. This can improve the installation workability of the airbag module 30.

[0105] Furthermore, according to the vehicle seat S, by providing the storage portion 1A for storing the airbag module 30 on the side portion of the seat back pad 1, the airbag module 30 can be arranged and installed in the storage portion 1A of the seat back pad 1 even after the seat back pad 1 is mounted to the seat back frame 10. In this way, since the airbag module 30 can be installed after the seat back pad 1 is mounted to the seat back frame 10, it is possible to suppress the positional deviation of the airbag module 30 when the seat back pad 1 is installed. As a result, the arrangement accuracy of the airbag module 30 can be improved.

[0106] Other Implementations.

[0107] In addition, the present invention is not limited to the above-mentioned embodiment.

[0108] For example, Fig.10 As shown, the inflator 32 may be disposed outside the container box 33 of the airbag module 30. In this case, the inflator 32 is disposed between the front wall portion 15A located in front of the seat and supporting the waist of the passenger and the rear wall portion 15B located behind the seat in the lower frame 15.

[0109] Furthermore, the stud bolts 36A and 36B attached to the inflator 32 are inserted through through holes provided in the rear wall portion 15B and are fixed to the rear wall portion 15B by nuts.

[0110] In addition, the inflator 32 and the airbag 31 are connected via a tube 38 , and the gas generated by the inflator 32 is injected into the airbag 31 via the tube 38 .

[0111] Thus, by arranging the inflator 32 at the position of the lower frame 15, it is possible to suppress the weight of the upper portion of the seat back frame 10. Thus, it is possible to suppress deformation of the seat back frame 10 when the vehicle is subjected to an impact.

[0112] Furthermore, by arranging the inflator 32 between the front wall portion 15A and the rear wall portion 15B of the lower frame 15 , it is possible to protect the inflator 32 from external impact. 2

[0114] Next, the retainer 34 will be described in detail.

[0115] like Fig.11 , Figure 7 and Fig.12 As shown, the retainer 34 includes a first extension portion 134A that protrudes from the container box 33 and extends toward the inner side of the seat, and a second extension portion 134B that faces the outer side surface 12A of the panel frame 12 .

[0116] like Fig.12 and Fig. 9 As shown, stud bolts 36A and 36B provided on the inflator 32 protrude toward the inner side of the seat through the first through hole 134G and the second through hole 134H formed in the second extension portion 134B of the retainer 34. The stud bolts 36A and 36B pass through through holes formed in the plate frame 12, respectively.

[0117] Then, by tightening nuts to the stud bolts 36A from the seat inner side of the panel frame 12 , the inflator 32 , the retainer 34 , and the panel frame 12 are fixed.

[0118] On the other hand, the inflator 32 is fixed to the retainer 134 by tightening the nut 37 on the stud 36B. In addition, the diameter of the through hole of the plate frame 12 through which the stud 36B passes is larger than the diameter of the nut 37, so the retainer 34 and the plate frame 12 are not fixed in this portion.

[0119] In addition, a fabric clamp 60 for fixing the fabric is mounted on the panel frame 12 at a position sandwiching the stud bolts 36A and 36B. Here, the fabric is a member for guiding the deployment direction of the airbag 31 by covering the side of the airbag module 30.

[0120] like Fig.11 As shown, the outer extension portion 22B of the bracket 20 is attached to the first extension portion 134A of the retainer 34 .

[0121] Specifically, if Fig.11 and Fig.12 As shown, the first extension portion 134A has a notch portion 134C formed therein, which is formed from an end opening portion 134D at the inner end portion of the seat to a central opening portion 134E at the center portion.

[0122] Here, in the first extension portion 134A, a flange portion 134F protruding toward the seat rear is formed around the cutout portion 134C. By forming the flange portion 134F in the first extension portion 134A in this way, the strength of the first extension portion 134A is improved.

[0123] Then, the bolt 24 is passed through the through hole formed in the outer extension portion 22B of the bracket 20 and the cutout portion 134C, and the cap nut 25 is fitted into and fastened to the end portion 24A of the bolt 24. Thus, the bracket 20 and the retainer 34 are fixed.

[0124] According to the above configuration, the end 24A of the bolt 24 faces the rear of the seat and can be inserted into the cap nut 25 from the rear of the seat. Also, since the end 24A of the bolt 24 is covered by the cap nut 25, the end 24A of the bolt 24 can be prevented from damaging the interior of the seat back S1.

[0125] According to the vehicle seat S described above, since the bracket 20 for mounting the airbag module 30 is mounted on the inner side surface of the side frame 13, the width in the left-right direction of the mounting portion of the airbag module 30 becomes compact. Furthermore, since the airbag module 30 is mounted further to the rear of the seat than the mounting portion of the bracket 20 and the side frame 13, the operability when assembling the airbag module 30 to the bracket 20 from the rear of the seat can be improved.

[0126] Furthermore, even when an external force is applied to the retainer 34 in the seat inner direction and the seat upper and lower direction, it is possible to suppress the retainer 34 and the side frame 13 from being fixedly disengaged.

[0127] In the vehicle seat S, the retainer 34 is fixed to the bracket 20 mounted on the side frame 13 using the bolt 24 and the cap nut 25. This makes it easy to mount the retainer 34 on the side frame 13.

[0128] Furthermore, according to the vehicle seat S, the airbag module 30 can be simultaneously mounted on the bracket 20 and the outer side surface 12A of the panel frame 12. This can improve mounting rigidity compared to a case where the airbag module 30 is mounted on either the bracket 20 or the panel frame 12.

[0129] In addition, according to the vehicle seat S, by making the opening width of the end opening 134D in the cutout 134C narrower than the opening width of the central opening 134E through which the bolt 24 is inserted, even when an external force in the seat outer direction is applied to the retainer 34 after the retainer 34 is attached to the side frame 13, it is possible to suppress the bolt 24 from falling out of the cutout 134C of the retainer 34. Thus, the retainer 34 and the side frame 13 can be fixed to each other with difficulty.

[0130] According to the vehicle seat S, the flange portion 134F is formed around the cutout portion 134C in the first extension portion 134A, so that the rigidity around the attachment portion of the retainer 34 to the side frame 13 can be increased.

[0131] Furthermore, according to the vehicle seat S, the retainer 34 is exposed from between the upper end and the lower end of the container box 33 of the airbag module 30 , so that the airbag module 30 can be configured compactly.

[0132] The vehicle seat of the present invention comprises a side frame constituting a side portion of a seat back frame, and an airbag module mounted on the side frame, the airbag module having a guard ring mounted on the side frame, the guard ring having a first extension portion extending behind the side frame toward the inner side of the seat, a cutout portion extending from an end portion on the inner side of the seat toward the outer side of the seat being formed on the first extension portion, and the guard ring being fixed relative to the side frame using a mounting component inserted through the cutout portion.

[0133] According to the vehicle seat, the airbag module can be assembled from the rear of the seat to the side frame of the seat back, thereby improving the workability when installing the airbag module arranged on the side of the vehicle seat from the rear side of the seat.

[0134] Furthermore, even when external forces in the seat inner direction and the seat upper and lower directions are applied to the retainer, the retainer and the side frame can be prevented from being fixed and disengaged.

[0135] In the above vehicle seat, the guard has a second extension portion connected to the first extension portion and extending toward the front of the seat, and the second extension portion is attached to the side frame.

[0136] Thus, the retainer can be mounted on both sides of the side frame, thereby increasing the mounting rigidity between the retainer and the side frame.

[0137] In the above vehicle seat, the cutout portion is fixed to a bracket that is attached to the side frame and extends toward the rear of the seat.

[0138] Thus, by installing the bracket and the retainer, the retainer and the side frame can be easily fixed, and the bracket is installed on the side frame and extends toward the rear of the seat.

[0139] In the vehicle seat described above, the bracket is fixed to the retainer by the bolt inserted through the cutout portion and the nut tightened on the bolt.

[0140] Thus, the retainer is fixed to the bracket mounted on the side frame using bolts and nuts. According to this, the operation of mounting the retainer on the side frame can be easily performed.

[0141] In the above vehicle seat, the nut is a cap nut covering an end portion of the bolt.

[0142] In this way, by covering the end of the bolt with the cap nut, it is possible to suppress damage to the interior of the seat by the end of the bolt.

[0143] In the vehicle seat described above, the opening width of the end portion of the cutout portion on the inner side of the seat is narrower than the opening width of the portion through which the bolt is inserted.

[0144] Thus, after the retainer is mounted on the side frame, even when an external force in the direction of the seat outer side is applied to the retainer, the bolt can be prevented from falling off from the cutout portion of the retainer.

[0145] In the above vehicle seat, a flange is formed around the cutout portion in the first extending portion.

[0146] This can improve the rigidity of the retainer around the attachment portion to the side frame.

[0147] In the vehicle seat, the airbag module includes the retainer, the airbag, an inflator for supplying gas to the airbag, and a container box covering the retainer, the airbag, and the inflator, wherein the retainer is exposed between an upper end and a lower end of the container box.

[0148] Thus, the airbag module can be configured compactly.

[0149] The vehicle seat includes a seat back pad mounted on the seat back frame, wherein the seat back pad has a storage portion that is open toward the outside of the seat at a side portion and stores the air bag module.

[0150] Thus, after the seat back pad is mounted on the seat back frame, the air bag module can be arranged and mounted in the storage portion of the seat back pad. 3

[0152] Next, another example of the mounting structure of the bracket 20 and the retainer 234 will be described.

[0153] The retainer 234 is a plate member for mounting the airbag module 30 to the seat back frame 10 .

[0154] like Fig.13 , Fig.14 , Fig.16 and Fig.17 As shown, the retainer 234 includes an inner extension portion 234A that protrudes from the container box 33 and extends toward the inner side of the seat, and a front extension portion 234B that faces the outer side surface 12A of the panel frame 12 .

[0155] Here, a through hole is formed in the center of the inner extension portion 234A, and a bolt 24 (an example of a mounting portion) inserted through the through hole is mounted in such a manner that the end of the bolt faces the rear of the seat (i.e., the opposite side of the extension direction of the front extension portion 234B). For example, when the inner extension portion 234A is made of metal, it is preferred that the bolt 24 is mounted to the inner extension portion 234A by welding.

[0156] like Fig.17 and Fig. 9 As shown, stud bolts 36A and 36B provided in the inflator 32 protrude toward the inside of the seat through first through holes 234C and second through holes 234D formed in the front extension portion 234B of the retainer 234. The stud bolts 36A and 36B pass through through holes formed in the panel frame 12, respectively.

[0157] Furthermore, by tightening nuts on the stud bolts 36A from the seat inner side of the panel frame 12 , the inflator 32 , the retainer 234 , and the panel frame 12 are fixed.

[0158] On the other hand, by tightening the nut 37 on the stud 36B, the inflator 32 is fixed to the retainer 234. In addition, the diameter of the through hole of the plate frame 12 through which the stud 36B passes is larger than the diameter of the nut 37, and the retainer 234 is not fixed to the plate frame 12 in this portion.

[0159] In addition, a fabric clamp 60 for fixing the fabric is mounted on the panel frame 12 at a position sandwiching the stud bolts 36A and 36B. Here, the fabric is a member for guiding the deployment direction of the airbag 31 by covering the side of the airbag module 30.

[0160] like Fig.14 and 15 As shown, a through hole 11B and a through hole 11C arranged vertically are formed on the side surface of the side portion 11A of the right tubular frame 11 on the inner side of the seat.

[0161] Here, the bracket 20 includes a mounting portion 21 mounted in the through hole 11C of the pipe frame 11, and a rear protruding portion 22 protruding rearward from the mounting portion 21. The rear protruding portion 22 is composed of a rear extension portion 22A extending from the mounting portion 21 to the rear of the seat, and an outer extension portion 22B extending from the rear extension portion 22A to the outer side of the seat.

[0162] like Fig.14 As shown, the bracket 20 is fixed to the tubular frame 11 by fastening screws 23 through the through holes formed in the mounting portion 21 of the bracket 20 and the through holes 11C formed in the bracket 20 .

[0163] like Fig.14 As shown in FIG. 1 , a flange portion that is recessed toward the outside of the seat is formed at the center of the rear extension portion 22A. This can improve the strength of the rear extension portion 22A.

[0164] like Fig.14 As shown, the inner extension portion 234A of the retaining ring 234 is installed on the outer extension portion 22B.

[0165] Specifically, if Fig.14 and Fig.17 As shown, a cutout portion 22C is formed in the outer extension portion 22B, which is notched from an end opening portion 22D at the outer end of the seat to a central opening portion 22E at the center.

[0166] Here, in the outer extension part 22B, a flange part 22F protruding toward the seat rear is formed around the cutout part 22C. By forming the flange part 22F in the outer extension part 22B in this way, the strength of the outer extension part 22B is improved.

[0167] Furthermore, the bolt 24 fixed to the retainer 234 passes through the cutout portion 22C from the end opening portion 22D to the central opening portion 22E, which is formed in the outer extension portion 22B of the bracket 20. Furthermore, the cap nut 25 is fitted into and fastened to the end portion 24A of the bolt 24. Thus, the bracket 20 and the retainer 234 are fixed.

[0168] According to the above configuration, the end 24A of the bolt 24 faces the rear of the seat and can be inserted into the cap nut 25 from the rear of the seat. Also, since the end 24A of the bolt 24 is covered by the cap nut 25, the end 24A of the bolt 24 can be prevented from damaging the interior of the seat back S1.

[0169] According to the vehicle seat S described above, since the bracket 20 for mounting the airbag module 30 is mounted on the inner side surface of the side frame 13, the width in the left-right direction of the mounting portion of the airbag module 30 becomes compact. Furthermore, since the airbag module 30 is mounted further to the rear of the seat than the mounting portion of the bracket 20 and the side frame 13, the operability when assembling the airbag module 30 to the bracket 20 from the rear of the seat can be improved.

[0170] Furthermore, even when external force in the seat inner direction and the seat upper and lower direction is applied to the retainer 234 , it is possible to suppress the retainer 234 and the side frame 13 from being fixedly disengaged.

[0171] In the vehicle seat S, the retainer 234 is fixed to the bracket 20 mounted on the side frame 13 using the bolt 24 and the cap nut 25. Thus, the retainer 234 can be easily mounted on the side frame 13.

[0172] Furthermore, according to the vehicle seat S, the airbag module 30 can be mounted on both the bracket 20 and the outer side surface 12A of the panel frame 12. This can improve mounting rigidity compared to the case where the airbag module 30 is mounted on either the bracket 20 or the panel frame 12.

[0173] In addition, according to the vehicle seat S, by making the opening width of the end opening portion 22D in the cutout portion 22C of the bracket 20 narrower than the opening width of the central opening portion 22E through which the bolt 24 is inserted, even if an external force in the seat outer direction is applied to the retainer 234 after the retainer 234 is attached to the side frame 13, it is possible to suppress the bolt 24 from coming off the cutout portion 22C of the bracket 20. Thus, the retainer 234 and the side frame 13 can be fixed to each other with difficulty.

[0174] Furthermore, according to the vehicle seat S, by forming the flange portion 22F around the cutout portion 22C in the outer extension portion 22B, the rigidity around the mounting portion of the bracket 20 with the retainer 234 can be increased.

[0175] Furthermore, according to the vehicle seat S, the retainer 234 is exposed from between the upper end and the lower end of the container box 33 of the airbag module 30 , so that the airbag module 30 can be configured compactly.

[0176] Furthermore, according to the vehicle seat S, the bolts 24 mounted on the retainer 234 can be inserted from the outside of the cutout portion 22C of the bracket 20. This can improve the mounting workability of the airbag module 30.

[0177] Next, refer to Fig.18 Next, a vehicle seat S according to a modified example of the present invention will be described. Fig.18In the illustrated variant, the shape of the bracket 120 differs from that of the bracket 20 .

[0178] That is, Fig.18 As shown, the bracket 120 is different from the bracket 20 in that the outer extension portion 22B does not have the cutout portion 22C but has a through hole 22G. The vehicle seat S according to the modification is the same as the above-mentioned embodiment in other respects, and thus description of the common points will be omitted.

[0179] Here, the installation operation of the bracket 120 and the retainer 234 in the vehicle seat S according to the modification will be described.

[0180] First, the bolt 24 fixed to the retainer 234 toward the rear of the seat is inserted through the through hole 22G formed in the outer extension portion 22B of the bracket 120. Then, the cap nut 25 is fitted and fastened to the end 24A of the bolt 24. Thus, the bracket 120 and the retainer 234 are fixed.

[0181] In the vehicle seat S according to the modified example, since the retainer 234 of the airbag module 30 can be assembled to the side frame 13 from the seat rear, the operability can be improved.

[0182] In the above embodiment, the bracket 20 is attached to the tubular frame 11 by the screws 23, but the bracket 20 may be attached to the tubular frame 11 by welding. Various welding methods such as arc welding and laser welding may be used for welding.

[0183] In addition, the method of fixing the bracket 20 and the retainer 234 is not limited to the method used in the above-mentioned embodiment.

[0184] For example, the bracket 20 and the retainer 234 may be fixed by welding the rear protruding portion 22 of the bracket 20 and the bolts 24 integrated with the retainer 234 .

[0185] For example, a tie rod protruding rearward from the inner extension portion 234A may be provided in the retainer 234 , and the retainer 234 and the bracket 20 may be fixed by inserting the tie rod through the cutout portion 22C of the rear protruding portion 22 .

[0186] The vehicle seat of the present invention is characterized in that it is provided with a side frame constituting a side portion of a seat back frame, an airbag module having a retaining ring mounted on the side frame, and a bracket connecting the side frame and the airbag module, the bracket having an outer extension portion extending toward the outer side of the seat behind the side frame, the outer extension portion forming a cutout portion extending from an end portion of the outer side of the seat toward the inner side of the seat, the retaining ring having an inner extension portion extending toward the inner side of the seat, and the inner extension portion and the outer extension portion being fixed using a mounting portion inserted through the cutout portion.

[0187] According to the vehicle seat, the airbag module can be assembled from the rear of the seat. In addition, the airbag module can be easily mounted with respect to the side frame facing the inner side of the seat. In addition, after the airbag module is mounted on the side frame, even if an impact is applied in the inner side of the seat and in the vertical direction of the seat, the airbag module can be prevented from falling off from the side frame.

[0188] Furthermore, in the above vehicle seat, the inner extension portion is arranged rearward of the outer extension portion.

[0189] This allows the bracket and the retainer to be fixed from the rear of the bracket.

[0190] Furthermore, in the above vehicle seat, the retainer has a front extension portion connected to the inner extension portion and extending toward the front of the seat, and the front extension portion is attached to the side frame.

[0191] Thus, the retainer can be mounted on both sides of the side frame, thereby increasing the mounting rigidity between the retainer and the bracket.

[0192] Furthermore, in the above vehicle seat, the bracket is attached to a side surface of the side frame on the inner side of the seat.

[0193] As a result, the width of the mounting portion of the air bag module in the left-right direction becomes compact.

[0194] Furthermore, in the above-mentioned vehicle seat, the retainer has the mounting portion, and the mounting portion has a portion protruding rearward from the inner extending portion.

[0195] This makes it possible to facilitate the operation of fixing the bracket and the retainer.

[0196] In the above vehicle seat, the bracket is fixed to the retainer by a bolt inserted through the cutout portion and a nut tightened on the bolt.

[0197] Thus, the retainer is fixed to the bracket mounted on the side frame using bolts and nuts. According to this, the operation of mounting the retainer on the side frame can be easily performed.

[0198] Furthermore, in the above vehicle seat, the nut is a cap nut covering an end portion of the bolt.

[0199] In this way, by covering the end of the bolt with the cap nut, it is possible to suppress damage to the interior of the seat by the end of the bolt.

[0200] Furthermore, in the above-mentioned vehicle seat, a flange is formed around the cutout portion in the outer extending portion.

[0201] Thus, after the retainer is mounted on the side frame, even if an external force in the direction of the seat outer side is applied to the retainer, the bolt can be prevented from falling off from the cutout portion of the retainer.

[0202] In the vehicle seat, the airbag module includes the retainer, the airbag, an inflator for supplying gas to the airbag, and a container box covering the retainer, the airbag and the inflator, and the retainer is exposed between the upper and lower ends of the container box.

[0203] This can improve the rigidity of the retainer around the attachment portion to the side frame.

[0204] In the vehicle seat, it is preferable to include a seat back pad mounted on the seat back frame, the seat back pad having a storage portion that is opened at a side portion toward the outside of the seat and stores the airbag module.

[0205] Thereby, the airbag module can be configured compactly.

[0206] In the vehicle seat, the side frame preferably includes a cylindrical pipe frame and a plate-like panel frame attached to a lower portion of the pipe frame, and the airbag module is attached to a side surface of the panel frame on an outer side of the seat.

[0207] Thus, the airbag module can be simultaneously mounted on the bracket and the side surface of the panel frame outside the seat. Thus, compared with the case where the airbag module is mounted on either the bracket or the panel frame, the operation of mounting the airbag module on the seat cushion frame can be made more secure.

[0208] Explanation of symbols

[0209] S Car Seat

[0210] S1 Seat Back

[0211] S2 Seat Pad

[0212] S3 Headrest

[0213] 1 Seat back cushion

[0214] 1A Storage Department

[0215] 2 Epidermis

[0216] 10 Seat back frame

[0217] 11 Tubular frame

[0218] 11A Side

[0219] 11B Through hole

[0220] 11C Through hole

[0221] 12 Plate Frame

[0222] 12A Outer side

[0223] 13 Side frame

[0224] 14 Beam

[0225] 15 Lower frame

[0226] 15A Front wall

[0227] 15B rear wall

[0228] 20 Bracket

[0229] 21 Installation

[0230] 22 Rear protrusion

[0231] 22A Rear extension

[0232] 22B Outer extension

[0233] 22C incision

[0234] 22D End opening

[0235] 22E Central opening

[0236] 22F Flange

[0237] 22G Through hole

[0238] 23 Screws

[0239] 24 Bolts

[0240] 24A End

[0241] 25 Cap nut

[0242] 30 Airbag module

[0243] 31 Airbags

[0244] 32 Inflator

[0245] 33 container box

[0246] 34 Retainer

[0247] 34A Protrusion

[0248] 34B Medial extension

[0249] 34C Opening

[0250] 34D Flat Plate

[0251] 35 Harness

[0252] 36A Stud Bolt

[0253] 36B Stud Bolt

[0254] 37 Nut

[0255] 38 tubes

[0256] 40 Airbag module

[0257] 41 Side Panel

[0258] 42 Screws

[0259] 50A welding part

[0260] 50B welding part

[0261] 60 Fabric Clips

[0262] 120 Bracket

[0263] 134A Extension 1

[0264] 134B 2nd Extension

[0265] 134C incision

[0266] 134D End opening

[0267] 134E Central opening

[0268] 134F Flange

[0269] 134G 1st through hole

[0270] 134H 2nd through hole

[0271] 234 retainer

[0272] 234A Inboard extension

[0273] 234B Front extension

[0274] 234C 1st through hole

[0275] 234D Second through hole

Claims

1. A vehicle seat, characterized in that: Equipped with side frame and airbag module, The side frame forms a side portion of the seat back frame; The airbag module is mounted on the side frame; The side frame comprises a cylindrical tubular frame and a plate-shaped plate frame installed at the lower part of the tubular frame, and the airbag module is installed on the side of the plate frame outside the seat; The airbag module has a retainer mounted on the side frame; Airbags; an inflator for supplying gas to the airbag; a container box covering the retainer, the airbag and the inflator; The guard ring has a first extension portion protruding from the container box and extending to the inner side of the seat behind the side frame, and a second extension portion connected to the first extension portion and extending to the front of the seat and facing the side surface of the outer side of the plate frame; A cutout portion is formed on the first extension portion from an end portion on the inner side of the seat toward an outer side of the seat; The retaining ring is fixed relative to the side frame using a mounting member inserted through the cutout portion; The retaining ring is exposed between the upper end and the lower end of the container box; The cutout portion is fixed to a bracket mounted on the side frame and extending to the rear of the seat; The bracket is arranged below the joint between the tubular frame and the plate frame; The first stud bolt and the second stud bolt provided on the inflator protrude toward the inner side of the seat through the first through hole and the second through hole formed on the second extension portion of the retaining ring, and the first stud bolt and the second stud bolt respectively pass through the through holes formed on the plate frame, and the inflator, the retaining ring and the plate frame are fixed by tightening a nut to the first stud bolt from the inner side of the seat of the plate frame; the second extension portion is mounted on the side frame.

2. The vehicle seat according to claim 1, characterized in that: The bracket is fixed to the retainer by a bolt inserted through the cutout portion and a nut tightened on the bolt.

3. The vehicle seat according to claim 2, characterized in that: The nut is a cap nut covering an end portion of the bolt.

4. The vehicle seat according to claim 2, characterized in that: The opening width of the end portion of the cutout portion on the inner side of the seat is narrower than the opening width of the portion through which the bolt is inserted.

5. The vehicle seat according to claim 1, characterized in that: In the first extending portion, a flange portion is formed around the cutout portion.

6. The vehicle seat according to claim 1, characterized in that: A seat back cushion mounted on the seat back frame; The seat back pad has a storage portion that opens at a side portion toward an outer side of a seat and stores the airbag module.

Images