Vehicular seat

Abstract

To provide a vehicular seat which provides a side airbag device and an arm rest on the same side part of a seat without enlarging the side airbag device.SOLUTION: A seat 1 includes a seat bag frame 30, a side air bag device 5 which is mounted to the seat bag frame 30 and an armrest device 6. The seat bag frame 30 has a pair of right and left first and second side frames 34, 35, the armrest device 6 has an arm rest 60 and a mounting member 61 which mounts the arm rest 60 to the seat bag frame 30, and the side air bag device 5 is mounted to an outer side surface of the first side frame 34. The arm rest 60 is mounted to the first side frame 34 via the mounting member 61 so as to be arranged side by side with a predetermined interval with respect to the side air bag device 5 on the outer side of the side air bag device 5 mounted to the first side frame 34.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a vehicle seat.

Background Art

[0002] Conventionally, a vehicle seat provided on the same side of a seat, which has a side airbag device that bulges and deploys along the side of the seat to protect an occupant sitting on the seat from an impact when the vehicle is impacted, and an armrest on which the occupant's arm is placed, is known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the vehicle seat described in Patent Document 1 above, since the armrest is arranged in front of the side airbag device, it is necessary to bulge the airbag from the outside of the armrest toward the front so as to avoid the armrest. Therefore, the length of the side airbag device in the width direction has to be made longer than the length of the armrest in the width direction, and there is a problem that the side airbag device becomes larger in size.

Means for Solving the Problems

[0005] In order to solve the above problems, the invention according to claim 1 is a vehicle seat, comprising a seat back frame forming a skeleton of the seat back, an airbag device and an armrest device attached to the seat back frame, the seat back frame having a pair of left and right first and second side frames, the armrest device having an armrest and a mounting member for mounting the armrest to the seat back frame, the airbag device being attached to an outer portion of the first side frame, and the armrest being attached to the first side frame via the mounting member so as to be arranged side by side with the airbag device at a predetermined interval outside the airbag device attached to the first side frame.

[0006] According to the invention according to claim 1, the airbag device and the armrest can be arranged at the outer portion of the seat back frame without increasing the size of the airbag device.

[0007] The invention according to claim 2 is the vehicle seat according to claim 1, wherein the mounting member has an armrest mounting portion to which the armrest is mounted and an arm portion extending from the armrest mounting portion and fixed to the first side frame, and the armrest mounting portion is mounted to the armrest so as to be positioned between the airbag device and the armrest.

[0008] According to the invention according to claim 2, since the armrest mounting portion supports the armrest inside the armrest, the mounting member can be miniaturized.

[0009] The invention according to claim 3 is the vehicle seat according to claim 1, wherein the mounting member has an inner mounting member and an outer mounting member covering the outside of the inner mounting member, the inner mounting member being fixed to the outer portion of the first side frame, and the outer mounting member being fixed to a flange portion intersecting the outer portion of the first side frame.

[0010] According to the invention according to claim 3, since the mounting member is fixed to each of the two surfaces of the first side frame, the mounting member can be firmly fixed to the first side frame.

[0011] The invention according to claim 4 is the vehicle seat according to claim 3, wherein the outer mounting member has a flat plate portion facing the flange portion and a reinforcing portion provided at a boundary of the flat plate portion, and the flat plate portion has a fixing portion capable of being fixed to the flange portion at a position spaced a predetermined distance from the reinforcing portion.

[0012] According to the invention according to claim 4, since the fixing portion is provided in the vicinity of the reinforcing portion, even when the fixing portion is constituted by a through hole, the rigidity of the flat plate portion can be maintained.

[0013] The invention according to claim 5 is the vehicle seat according to claim 4, wherein the armrest device further includes a reinforcing member for reinforcing the mounting state of the mounting member, and the reinforcing member is fixed to the flange portion so as to overlap the flat plate portion of the outer mounting member.

[0014] According to the invention according to claim 5, by clamping the flat plate portion of the outer mounting member together with the reinforcing member, the outer mounting member can be firmly fixed to the first side frame.

[0015] The invention according to claim 6 is the vehicle seat according to claim 5, wherein the reinforcing member has a first fixing portion for clamping the flat plate portion between the flange portion and a second fixing portion for clamping the flange portion between the flat plate portion.

[0016] According to the invention according to claim 6, by alternately fastening the reinforcing member to the outer mounting member with the first and second fixing portions, the outer mounting member can be firmly fixed to the first side frame.

[0017] The invention according to claim 7 is characterized in that, in the vehicle seat according to claim 6, the first fixing portion is fastened in a state overlapping the flat plate portion and the flange portion.

[0018] According to the invention according to claim 7, by clamping the flat plate portion of the outer mounting member together with the first fixing portion of the reinforcing member, the outer mounting member can be firmly fixed by the first side frame.

[0019] The invention according to claim 8 is characterized in that, in the vehicle seat according to claim 6, the second fixing portion is fastened in a state overlapping the flange portion and the flat plate portion.

[0020] According to the invention according to claim 8, by clamping the flat plate portion of the outer mounting member together with the second fixing portion of the reinforcing member, the outer mounting member can be firmly fixed by the first side frame.

[0021] The invention according to claim 9 is characterized in that, in the vehicle seat according to claim 6, the first side frame has a through hole for positioning a force cloth clip that positions a force cloth that regulates the deployment direction of the airbag of the airbag device, and the reinforcing member further has a third fixing portion that can be fixed to the inner surface of the first side frame in the vicinity of the through hole.

[0022] According to the invention according to claim 9, even when a through hole is provided in the first side frame, since the third fixing portion of the reinforcing member is provided in the vicinity thereof, the rigidity of the first side frame can be maintained.

[0023] The invention according to claim 10 is characterized in that, in the vehicle seat according to claim 9, the third fixing portion clamps the first side frame with the inner mounting member and is fastened in a state overlapping the first side frame and the inner mounting member.

[0024] According to the invention according to claim 10, by tightening together the reinforcing member and the inner mounting member while sandwiching the first side frame, the inner mounting member can be firmly fixed to the first side frame.

[0025] The invention according to claim 11 is the vehicle seat according to claim 5, wherein the seat back frame further has an upper frame connecting the first and second side frames, and the reinforcing member is provided below the lower end of the upper frame.

[0026] According to the invention according to claim 11, it is possible to suppress interference between the upper frame and the reinforcing member.

Advantages of the Invention

[0027] According to the present invention, without increasing the size of the side airbag device, the side airbag device and the armrest can be provided on the same side of the seat.

Brief Description of the Drawings

[0028]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7A

Figure 7B

Figure 8A

Figure 8B

Figure 9

Figure 10

Figure 11

Embodiment for Carrying out the Invention

[0029] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The vehicle seat according to the embodiment of the present invention can be used as a seat mounted on various vehicles such as airplanes, railways, and automobiles. Hereinafter, as an example of the vehicle seat, an example applied to a seat mounted on an automobile will be described.

[0030] FIG. 1 is a perspective view of the seat 1 according to the embodiment of the present invention. Hereinafter, for convenience, the front-rear direction, left-right direction, and up-down direction are defined as shown in the drawing, and each part will be described according to this definition. The front-rear direction, left-right direction, and up-down direction of the seat 1 coincide with the front-rear direction (length direction), left-right direction (width direction), and up-down direction (height direction) of the vehicle in the normal use state.

[0031] As shown in FIG. 1, the seat 1 includes a seat cushion 2 that supports the occupant's buttocks, a seat back 3 that supports the occupant's waist and back, and a headrest 4 that supports the occupant's head. The seat cushion 2 is supported by a slide device (not shown) provided on the vehicle floor so as to be slidable in the front-rear direction, and the seat back 3 is rotatably supported by the seat cushion 2 by a reclining mechanism (not shown) at the rear end of the seat cushion 2. The headrest 4 is supported at the upper end of the seat back 3 so that the height in the up-down direction can be adjusted with respect to the seat back 3.

[0032] The seat cushion 2 includes a seat cushion frame 20 that forms a skeleton along the outer shape of the seat cushion 2, a cushion pad 21 made of a cushion material such as urethane foam, and a cushion skin material 22 made of synthetic leather, fabric, or the like. The cushion pad 21 is attached to the seat cushion frame 20, and these are formed by covering them with the cushion skin material 22.

[0033] The seat back 3 includes a seat back frame 30 that forms a skeleton along the outer shape of the seat back 3, a back pad 31 made of a cushion material such as urethane foam, a back skin material 32 made of synthetic leather, fabric, or the like, a side airbag device (airbag device) 5 that inflates and deploys an airbag 50 when impacted, and an armrest device 6 on which a passenger's arm can be placed. The seat back 3 is formed by attaching the back pad 31 and the side airbag device 5 to the seat back frame 30, covering these with the back skin material 32, and then attaching the armrest device 6 to the seat back body 33. The side airbag device 5 and the armrest device 6 are provided on the same side portion of the seat back frame 30. Note that the seat back 3, the side airbag device 5, and the armrest device 6 will be described in detail later.

[0034] The headrest 4 does not have a frame that forms a skeleton along the outer shape like the seat cushion 2 or the seat back 3, and is formed by covering a headrest pad 41 formed in a predetermined shape with a headrest skin material 42. Inside the headrest 4, a pair of left and right headrest stays 43, 43 are disposed, and the headrest 4 is supported by the seat back frame 30 via the pair of left and right headrest stays 43, 43 so that the height can be adjusted in the vertical direction.

[0035] FIG. 2 is a perspective view showing the frame configuration of the seat back 3 according to the present embodiment. As shown in FIG. 2, the seat back 3 includes, as a frame configuration forming the outer shape, a seat back frame 30, a side airbag device 5 and an armrest device 6 attached to the seat back frame 30. In FIG. 2, the frame configuration of the armrest device 6 is shown.

[0036] The seat back frame 30 extends in the vertical direction and includes a pair of left and right first and second side frames 34 and 35 that form the left and right side portions of the seat back frame 30, an upper frame 36 that connects the first and second side frames 34 and 35 and forms the upper part of the seat back frame 30, an upper member 37 that extends in the horizontal direction and connects the upper frame 36 in the horizontal direction, a lower member 38 that extends in the horizontal direction and connects the first and second side frames 34 and 35 to form the lower part of the seat back frame 30, and a pressure receiving member 39 disposed inside thereof.

[0037] The first side frame 34 is formed in a substantially plate shape facing in the horizontal direction and is formed to be wider in the front-rear direction as it goes from above to below. Further, a flange portion 34b extending inward from the frame body 34a is provided at the rear end portion (the back side of the seat 1) of the first side frame 34, and the flange portion 34b is provided from the upper part to the lower part of the frame body 34a. By providing the flange portion 34b, the rigidity of the frame body 34a is reinforced. The second side frame 35 is formed symmetrically with the first side frame 34 in the left-right direction and has the same configuration as the first side frame 34 except for the configuration for attaching the side airbag device 5 and the armrest device 6, so the description thereof is omitted here. The configuration for attaching the side airbag device 5 and the armrest device 6 to the first side frame 34 will be described later.

[0038] The upper frame 36 is formed in an inverted U shape by bending a pipe-shaped member, and the lower end portions 36a, 36a thereof are connected to the upper portions of the first and second side frames 34, 35 respectively. Each of the lower end portions 36a, 36a of the upper frame 36 is provided so as to at least partially overlap with the upper portions of the first and second side frames 34, 35, and is joined to the inner portions of the first and second side frames 34, 35 by welding or the like. Further, on the upper portion of the upper frame 36, a pair of left and right support brackets 36b, 36b for supporting a pair of left and right headrest stays 43, 43 are provided, and the pair of left and right support brackets 36b, 36b are formed so as to be able to insert the pair of left and right headrest stays 43, 43.

[0039] The upper member 37 is connected so as to span the inverted U-shaped upper frame 36 in the left-right direction, and the rigidity of the upper frame 36 is reinforced by the upper member 37. The lower member 38 is connected to the lower end portion of each of the first and second side frames 34, 35. The pressure receiving member 39 is formed in a shape capable of supporting the load from the upper body (waist and back) of the seated occupant, and is spanned between the upper member 37 and the lower member 38. The pressure receiving member 39 is spanned over the upper member 37 via, for example, an upper connecting wire 39a.

[0040] The side airbag device 5 includes an airbag module 51 including an airbag 50, an inflator 52 that generates high-pressure gas to inflate the airbag 50, a force cloth 53 that is positioned by a force cloth clip 54 and regulates the deployment direction of the airbag 50, and an airbag case 55 that houses these components, and is fixed to the outer portion of the frame body 34a of the first side frame 34.

[0041] The side airbag device 5 is configured such that the inflater 52 is activated by a signal from an acceleration sensor or the like that generates upon impact during a collision, and the high-pressure gas generated at that time is blown into the airbag 50. When the expansion force of the airbag 50 acts on the airbag case 55 and the back skin material 32, the airbag case 55 and the back skin material 32 break, and the airbag 50 instantaneously deploys forward of the vehicle from the outer portion of the frame body 34a.

[0042] The airbag case 55 has a thin, substantially rectangular parallelepiped shape that is long in the vertical direction and short in the horizontal direction in the mounted state, and is formed to be able to accommodate the airbag module 51, the inflater 52, the force cloth 53, and the like. The airbag case 55 is provided to extend further downward along the outer portion of the frame body 34a from the upper end portion of the first side frame 34 beyond the mounting position of the armrest device 6, and is fixed to the frame body 34a through an airbag mounting hole formed in the wide portion 34c of the frame body 34a.

[0043] Two airbag mounting holes 34d, 34d (see FIG. 10 described later) are formed in the wide portion 34c of the frame body 34a, and the side airbag device 5 is fixed to the frame body 34a by bolts and nuts through these two airbag mounting holes 34d, 34d. Similarly, in the wide portion 34c of the frame body 34a, two force cloth clip arrangement holes (through holes) 34e, 34e (see FIG. 10 described later) where the force cloth clip 54 can be arranged are formed in the vicinity of each of the two airbag mounting holes 34d, 34d. The force cloth clip arrangement holes 34e, 34e are provided so that the force cloth clip 54 does not interfere with the frame body 34a when the side airbag device 5 is fixed to the frame body 34a.

[0044] The armrest device 6 includes a substantially rectangular parallelepiped-shaped armrest 60 that is long in the front-rear direction in the use state, a mounting member 61 that attaches the armrest 60 to the first side frame 34, and a reinforcing member 62 that reinforces the mounting state of the mounting member 61.

[0045] As shown in Fig. 1, the armrest 60 has an armrest frame 601 that forms the skeleton of the armrest 60, an armrest pad 602 made of a cushioning material such as urethane foam, and an armrest skin material 603 made of synthetic leather, fabric, or the like. The armrest pad 602 is attached to the armrest frame 601, and they are formed by covering them with the armrest skin material 603.

[0046] Fig. 3 is a cross-sectional view taken along line III-III of Fig. 2 showing the positional relationship among the armrest 60, the attachment member 61, the side airbag device 5, and the first side frame 34. As shown in Fig. 3, the armrest 60 is arranged side by side in the left-right direction with a predetermined interval from the side airbag device 5 outside the side airbag device 5 attached to the first side frame (frame body 34a) 34. This predetermined interval is an interval that can suppress the interference of the armrest 60 when the airbag 50 of the side airbag device 5 bulges and deploys. By providing the predetermined interval, the side airbag device 5 and the armrest 60 can be arranged side by side in the left-right direction on the outer side of the first side frame 34. Also, in this arrangement, since there is no obstacle in front of the side airbag device 5, the side airbag device 5 can be miniaturized. For example, by using a thin-type side airbag device 5, the armrest 60 can be arranged near the seat back body 33, and the length of the seat back body 33 in the left-right direction can also be shortened (the width can be narrowed). For example, the gusset part 33a of the seat back body 33 where the side airbag device 5 is located can be miniaturized.

[0047] Fig. 4 is a perspective view of the attachment member 61 to which the armrest 60 is attached. As shown in Fig. 4, the attachment member 61 has an armrest attachment part 611 to which the armrest 60 is attached, and an arm part 612 that extends from the armrest attachment part 611 and is fixed to the first side frame 34, and arranges the armrest 60 side by side in the left-right direction with a predetermined interval from the side airbag device 5.

[0048] The armrest mounting portion 611 is attached to the inner portion of the armrest 60 facing the outer portion of the side airbag device 5, and supports the armrest 60 so as to be rotatable between a use position and a storage position about an axis CL1 extending in the left-right direction. That is, the armrest mounting portion 611 rotatably supports the armrest 60 between the side airbag device 5 and the armrest 60 (see FIG. 3). By positioning the armrest mounting portion 611 between the side airbag device 5 and the armrest 60, it becomes possible to shorten the arm portion 612 and miniaturize the mounting member 61.

[0049] The arm portion 612 has an extending portion 612a that bends inward from the rear end portion of the armrest mounting portion 611 and extends toward the first side frame 34, and a fixing portion 612b that abuts against the first side frame 34 and is fixed to the first side frame 34. The extending portion 612a is provided so that the side airbag device 5 and the armrest 60 have a predetermined interval, and the bending shape facilitates the formation. The fixing portion 612b is fixed to the frame body 34a and the flange portion 34b of the first side frame 34 with the reinforcing member 62 interposed therebetween. By fixing the fixing portion 612b to the frame body 34a and the flange portion 34b, it becomes possible to firmly fix the mounting member 61 to the first side frame 34, and by fixing it with the reinforcing member 62 interposed therebetween, it can be fixed more firmly.

[0050] FIG. 5 is an exploded perspective view of the mounting member 61. As shown in FIG. 5, the mounting member 61 includes an inner mounting member 613 disposed inside and an outer mounting member 614 disposed outside so as to cover the outside of the inner mounting member 613. The inner mounting member 613 and the outer mounting member 614 are formed to be fitted in a state where the inner mounting member 613 is disposed inward, and the mounting member 61 is formed by joining a plurality of locations on the outer edge portion by welding or the like in a state where the inner mounting member 613 and the outer mounting member 614 are fitted together. By making the mounting member 61 have a closed cross-sectional shape with a hollow portion by fitting and joining the inner mounting member 613 and the outer mounting member 614, the rigidity of the mounting member 61 can be improved.

[0051] FIG. 6 is a perspective view of the inner mounting member 613 as viewed from the front. The inner mounting member 613 is formed by bending a plate-like member formed into a predetermined shape. As shown in FIG. 6, the inner mounting member 613 has a fitting portion 613a that fits with the outer mounting member 614, a fixing portion 613b that is fixed to the frame body 34a of the first side frame 34, and a connecting portion 613c that connects the fitting portion 613a and the fixing portion 613b. A part of the fitting portion 613a constitutes the armrest mounting portion 611, and the other fitting portion 613a, the connecting portion 613c, and the fixing portion 613b constitute the arm portion 612.

[0052] The fitting portion 613a is bent at its outer edge portion toward the outer mounting member 614 so that a closed cross-sectional shape with a hollow portion can be formed with the outer mounting member 614, and is formed to be fitted with the fitting portion 614a of the outer mounting member 614. A through hole 613d for inserting a rotating shaft (see FIG. 3) 604 that rotatably supports the armrest 60 is formed in the fitting portion 613a.

[0053] The fixing portion 613b is provided so as to be disposed opposite to the fitting portion 613a, and is formed so as to be capable of abutting against the outer portion of the frame body 34a of the first side frame 34. The fixing portion 613b has two first through holes 613e, 613e and two second through holes 613f, 613f. The two first through holes 613e, 613e are formed so as to correspond to two first arm mounting holes 34f, 34f (see FIG. 10) formed in the wide portion 34c of the frame body 34a. The two second through holes 613f, 613f are formed so as to correspond to two airbag mounting holes 34d, 34d (see FIG. 10) formed in the wide portion 34c of the frame body 34a. The fixing portion 613b is fixed to the wide portion 34c of the frame body 34a by bolts and nuts through the two first through holes 613e, 613e and the two first arm mounting holes 34f, 34f. Bolts and nuts for fixing the airbag case 55 to the wide portion 34c of the frame body 34a are inserted into the two second through holes 613f, 613f. That is, the airbag case (side airbag device 5) 55 is fixed to the frame body 34a of the first side frame 34 through the fixing portion 613b of the inner mounting member 613.

[0054] The two first arm mounting holes 34f, 34f formed in the wide portion 34c of the frame body 34a of the first side frame 34 are formed in the vicinity of each of the two airbag mounting holes 34d, 34d and the two force cloth clip arrangement holes 34e, 34e described above.

[0055] FIG. 7A is a perspective view of the outer mounting member 614 as seen from the front, and FIG. 7B is a perspective view of the outer mounting member 614 as seen from the rear. The outer mounting member 614 is formed by bending a plate-shaped member formed in a predetermined shape. As shown in FIGS. 7A and 7B, it has a fitting portion 614a that fits into the fitting portion 613a of the inner mounting member 613, a flat plate portion 614b that is fixed to the flange portion 34b of the first side frame 34, and a connecting portion 614c that connects the fitting portion 614a and the flat plate portion 614b. A part of the fitting portion 614a constitutes the armrest mounting portion 611, and the other fitting portion 614a, the connecting portion 614c, and the flat plate portion 614b constitute the arm portion 612.

[0056] The fitting portion 614a is bent at its outer edge portion toward the inner mounting member 613 so that it can form a closed cross-sectional shape having a hollow portion together with the inner mounting member 613, and is formed to be capable of fitting with the fitting portion 613a of the inner mounting member 613. A notch portion 614d is provided at the bending portion of the fitting portion 614a, making it easy to bend the fitting portion 614a inward toward the inner mounting member 613. Further, a through hole 614e for inserting a rotating shaft (see FIG. 3) 604 that rotatably supports the armrest 60 is formed in the fitting portion 614a.

[0057] The flat plate portion 614b is bent from the connecting portion 614c in a direction intersecting the fitting portion 614a and is configured to be able to contact the flange portion 34b of the first side frame 34. A plurality of reinforcing portions 614g are provided at positions spaced a predetermined distance from the two through holes 614h, 614h at the boundary between the flat plate portion 614b and the connecting portion 614c, and each of the plurality of reinforcing portions 614g is constituted by a welding bead. By providing the plurality of reinforcing portions 614g, the rigidity of the flat plate portion 614b bent from the connecting portion 614c is reinforced.

[0058] The flat portion 614b has two fixing portions 614f, 614f that can be fixed to the flange portion 34b at a position spaced a predetermined distance from the reinforcing portion 614g. Through holes 614h are formed in each of the two fixing portions 614f, 614f. The through holes 614h formed in each of the two fixing portions 614f, 614f are provided to correspond to the two second arm mounting holes 34g, 34g formed in the flange portion 34b. The flat portion 614b is fixed to the flange portion 34b of the first side frame 34 by bolts and nuts via the through holes 614h of each of the two fixing portions 614f, 614f and the two second arm mounting holes 34g, 34g.

[0059] FIG. 8A is a perspective view of the reinforcing member 62 as viewed from the rear side, and FIG. 8B is a perspective view of the reinforcing member 62 as viewed from the inner side. The reinforcing member 62 is formed in a concavo-convex shape having a plurality of ribs by bending a plate-like member formed in a predetermined shape. As shown in FIGS. 8A and 8B, it includes a first contact portion 62a that can contact the flange portion 34b of the first side frame 34 and a second contact portion 62b that can contact the frame body 34a of the first side frame 34.

[0060] The first contact portion 62a has a first fixing portion 62c that can be fixed to the outer surface of the flange portion 34b and a second fixing portion 62d that can be fixed to the inner surface of the flange portion 34b. The first fixing portion 62c is provided at a position corresponding to one of the second arm mounting holes 34g formed in the flange portion 34b, and the second fixing portion 62d is provided at a position corresponding to the other second arm mounting hole 34g formed in the flange portion 34b.

[0061] The first fixing portion 62c sandwiches the flat portion 614b of the outer mounting member 614 with the flange portion 34b, inserts bolts and nuts through the first through hole 62e provided in the first fixing portion 62c, one of the through holes 614h formed in the flat portion 614b, and one of the second arm mounting holes 34g formed in the flange portion 34b, and is clamped together with the flat portion 614b to the flange portion 34b. By fastening the flat portion 614b together with the first fixing portion 62c in a state where they are overlapped with the flange portion 34b, the mounting strength of the flat portion 614b can be improved.

[0062] The second fixing portion 62d sandwiches the flange portion 34b with the flat plate portion 614b of the outer mounting member 614. A bolt and nut are inserted through the second through hole 62f provided in the second fixing portion 62d, the other second arm mounting hole 34g formed in the flange portion 34b, and the other through hole 614h formed in the flat plate portion 614b, and are fastened together with the flat plate portion 614b to the flange portion 34b. By fastening the flat plate portion 614b in a state of being overlapped with the second fixing portion 62d on the flange portion 34b, the mounting strength of the flat plate portion 614b can be improved.

[0063] The reinforcing member 62 is configured to improve the mounting strength of the flat plate portion 614b fastened to the flange portion 34b by stagger-fastening the first and second fixing portions 62c, 62d to the flange portion 34b.

[0064] The second abutting portion 62b has two third fixing portions 62g, 62g that can be fixed to the inner side portion of the frame body 34a of the first side frame 34. Each of the two third fixing portions 62g, 62g is provided at a position corresponding to each of the two first arm mounting holes 34f, 34f formed in the wide portion 34c of the frame body 34a. The two third fixing portions 62g, 62g sandwich the wide portion 34c of the frame body 34a with the fixing portion 613b of the inner mounting member 613. A bolt and nut are inserted through the through holes 62h, 62h provided in each of the two third fixing portions 62g, 62g, the two first arm mounting holes 34f, 34f provided in the wide portion 34c of the frame body 34a, and the two first through holes 613e, 613e provided in the fixing portion 613b of the inner mounting member 613, and are fastened together with the fixing portion 613b to the frame body 34a. By fastening each of the two third fixing portions 62g, 62g in a state of being overlapped with the fixing portion 613b on the wide portion 34c of the frame body 34a, the mounting strength of the fixing portion 613b can be improved.

[0065] In the vicinity of each of the two third fixing portions 62g, 62g of the second contact portion 62b, when the reinforcing member 62 is fixed to the first side frame 34, two airbag mounting holes 34d, 34d formed in the widened portion 34c of the frame body 34a of the first side frame 34 are provided at positions facing each other with two operation holes 62i, 62i. The two operation holes 62i, 62i are provided so that a tool for operating bolts and nuts for fixing the airbag case 55 to the widened portion 34c of the frame body 34a can be inserted. Even when the two operation holes 62i, 62i are provided, the reinforcing member 62 is provided with a plurality of ribs having an uneven shape, so that the rigidity is maintained.

[0066] FIG. 9 is a view showing the mounting state of the inner mounting member 613, and FIG. 10 is a view showing the mounting state of the outer mounting member 614. As shown in FIGS. 9 and 10, for the mounting member 61 of the armrest device 6, the inner mounting member 613 is fixed to the outer portion of the widened portion 34c of the frame body 34a of the first side frame 34, and the outer mounting member 614 is fixed to the outer surface portion of the flange portion 34b of the first side frame 34. Therefore, the armrest device 6 can be firmly fixed to the first side frame 34.

[0067] Also, the inner mounting member 613 is fastened in a state of overlapping with the frame body 34a of the first side frame 34 together with the two third fixing portions 62g, 62g of the reinforcing member 62, and the outer mounting member 614 is fastened in a state of overlapping with the flange portion 34b of the first side frame 34 together with the first and second fixing portions 62c, 62d of the reinforcing member 62. Therefore, the armrest device 6 can be more firmly fixed to the first side frame 34.

[0068] Furthermore, the outer mounting member 614 is fastened in a state of overlapping with the flange portion 34b of the first side frame 34 by stagger fastening of the first and second fixing portions 62c, 62d of the reinforcing member 62. Therefore, the armrest device 6 can be even more firmly fixed to the first side frame 34.

[0069] According to this embodiment, the following operational effects can be achieved. (1) The seat 1 includes a seat back frame 30 that forms the skeleton of the seat back 3, a side airbag device 5 and an armrest device 6 attached to the seat back frame 30 (FIG. 1). The seat back frame 30 has a pair of left and right first and second side frames 34, 35. The armrest device 6 has an armrest 60 and a mounting member 61 that mounts the armrest 60 to the seat back frame 30. The side airbag device 5 is attached to the outer surface of the first side frame 34 (FIGS. 1 and 2). The armrest 60 is attached to the first side frame 34 via the mounting member 61 so as to be arranged side by side with the side airbag device 5 at a predetermined interval outside the side airbag device 5 attached to the first side frame 34 (FIG. 2).

[0070] With this configuration, since the side airbag device 5 and the armrest 60 are arranged side by side in the left - right direction on one side in the left - right direction of the seat back 3, there is no need to increase the size of the side airbag device 5 in the left - right direction to avoid the armrest 60. Also, at this time, since the armrest 60 is arranged on the side of the side airbag device 5 with a predetermined interval, it does not prevent the bulging and deployment of the airbag 50. As a result, the side airbag device 5 and the armrest 60 can be arranged on the outer surface of the seat back frame 30 without increasing the size of the side airbag device 5.

[0071] Also, in this arrangement, by using a thin - type side airbag device 5, the armrest 60 can be arranged near the seat back body 33, and the length of the seat back body 33 in the left - right direction can also be shortened. For example, the gusset part 33a of the seat back body 33 where the side airbag device 5 is located can be miniaturized.

[0072] (2) The attachment member 61 has an armrest attachment portion 611 to which the armrest 60 is attached, and an arm portion 612 that extends from the armrest attachment portion 611 and is fixed to the first side frame 34. The armrest attachment portion 611 is attached to the armrest 60 so as to be positioned between the side airbag device 5 and the armrest 60 (FIG. 3).

[0073] With this configuration, since the armrest attachment portion 611 supports the armrest 60 inside the armrest 60, it becomes possible to shorten the arm portion 612, and the attachment member 61 can be miniaturized.

[0074] (3) The attachment member 61 has an inner attachment member 613 and an outer attachment member 614 that covers the outside of the inner attachment member 613 (FIG. 4). The inner attachment member 613 is fixed to the outer portion of the frame body 34a of the first side frame 34 (FIG. 9), and the outer attachment member 614 is fixed to the flange portion 34b that intersects the outer portion of the frame body 34a (FIG. 10).

[0075] With this configuration, since the attachment member 61 is fixed to the frame body 34a and the flange portion 34b of the first side frame 34, respectively, the attachment member 61 can be firmly fixed to the first side frame 34. In particular, since the portion of the first side frame 34 to which the attachment member 61 is fixed is the frame body 34a and the flange portion 34b that intersects it, it can be fixed more firmly.

[0076] (4) The outer attachment member 614 has a flat plate portion 614b facing the flange portion 34b and a plurality of reinforcing portions 614g provided at the boundary of the flat plate portion 614b. The flat plate portion 614b has two fixing portions 614f, 614f that can be fixed to the flange portion 34b at positions separated from each of the plurality of reinforcing portions 614g by a predetermined distance (FIG. 7B).

[0077] With this configuration, since the two fixing portions 614f, 614f are both provided in the vicinity of each of the plurality of reinforcing portions 614g, even when through holes 614h are formed in the two fixing portions 614f, 614f, the rigidity of each of the two fixing portions 614f, 614f can be maintained.

[0078] (5) The armrest device 6 further includes a reinforcing member 62 for reinforcing the mounting state of the mounting member 61 (Figs. 2 and 3), and the reinforcing member 62 is fixed to the flange portion 34b so as to overlap the flat plate portion 614b of the outer mounting member 614 (Fig. 10).

[0079] With this configuration, by overlapping the flat plate portion 614b of the outer mounting member 614 with the reinforcing member 62 and clamping them together, the outer mounting member 614 can be firmly fixed to the first side frame 34.

[0080] (6) The reinforcing member 62 has a first fixing portion 62c that clamps the flat plate portion 614b between the flat plate portion 614b and the flange portion 34b, and a second fixing portion 62d that clamps the flange portion 34b between the inner surface portion of the flange portion 34b and the flat plate portion 614b (Fig. 8A).

[0081] With this configuration, by stagger-fastening the first and second fixing portions 62c, 62d of the reinforcing member 62 to the outer mounting member 614 and the flange portion 34b, the outer mounting member 614 can be firmly fixed to the flange portion 34b of the first side frame 34.

[0082] (7) The first fixing portion 62c is fastened in a state of overlapping the flat plate portion 614b and the flange portion 34b (Figs. 8A and 10). With this configuration, by clamping the flat plate portion 614b of the outer mounting member 614 together with the first fixing portion 62c of the reinforcing member 62, the outer mounting member 614 can be more firmly fixed to the first side frame 34.

[0083] (8) The second fixing part 62d is fastened in a state of overlapping with the flange part 34b and the flat plate part 614b (Figs. 8A and 10). With this configuration, by clamping the flat plate part 614b of the outer mounting member 614 together with the second fixing part 62d of the reinforcing member 62, the outer mounting member 614 can be more firmly fixed to the first side frame 34.

[0084] (9) The first side frame 34 has two force cloth clip arrangement holes 34e, 34e where a force cloth clip 54 for positioning a force cloth 53 that restricts the deployment direction of the airbag 50 of the side airbag device 5 is arranged. The reinforcing member 62 further has two third fixing parts 62g, 62g that can be fixed to the inner surface of the first side frame 34 near each of the two force cloth clip arrangement holes 34e, 34e (Fig. 8A).

[0085] With this configuration, even when two force cloth clip arrangement holes 34e, 34e are provided in the frame body 34a of the first side frame 34, since the two third fixing parts 62g, 62g of the reinforcing member 62 are fixed in the vicinity thereof, the rigidity of the frame body 34a of the first side frame 34 can be maintained.

[0086] (10) The two third fixing parts 62g, 62g sandwich the first side frame 34 with the inner mounting member 613 and are fastened in a state of overlapping with the first side frame 34 and the inner mounting member 613 (Fig. 8A). With this configuration, by clamping the frame body 34a of the first side frame 34 with the reinforcing member 62 and the inner mounting member 613 and clamping them together, the inner mounting member 613 can be firmly fixed to the frame body 34a of the first side frame 34.

[0087] (11) The seat back frame 30 further has an upper frame 36 that connects the first and second side frames 34, 35, and the reinforcing member 62 is provided below the lower end of the upper frame 36 (Fig. 2). With this configuration, it is possible to suppress interference between the upper frame 36 and the reinforcing member 62.

[0088] The above-described embodiment can be modified into various forms. Hereinafter, modification examples will be described. FIG. 11 is a diagram showing a modification example of the arm portion 612 of the attachment member 61. In the above-described embodiment, the arm portion 612 of the attachment member 61 is formed to extend horizontally from the armrest attachment portion 611 and be fixed to the first side frame 34. However, for example, as shown in FIG. 11, it may be formed to extend downward from the armrest attachment portion 611 and be fixed to the first side frame 34. By using the arm portion 612A that extends downward from the armrest attachment portion 611, the attachability of the side airbag device 5 can be improved. Further, a configuration may be adopted in which a notch portion is provided by cutting out a horizontally extending arm portion downward.

[0089] The above description is merely an example, and the present invention is not limited to the above-described embodiment and modification examples as long as the features of the present invention are not impaired. It is also possible to arbitrarily combine one or more of the above-described embodiment and modification examples, and it is also possible to combine the modification examples with each other.

Explanation of Reference Numerals

[0090] 1 Seat (vehicle seat), 2 Seat cushion, 3 Seat back, 4 Headrest, 5 Side airbag device (airbag device), 6 Armrest device, 30 Seat back frame, 34 First side frame, 35 Second side frame, 60 Armrest, 61 Attachment member

Claims

1. The seat back includes a seat back frame that forms a framework of the seat back, and an airbag device and an armrest device that are attached to the seat back frame, The seat back frame has a pair of first and second side frames, The armrest device includes an armrest and an attachment member for attaching the armrest to the seat back frame, The airbag device is attached to an outer side portion of the first side frame, The armrest is attached to the first side frame via the mounting member so as to be positioned adjacent to the airbag device at a predetermined distance outside the airbag device attached to the first side frame.

2. The vehicle seat according to claim 1, The mounting member has an armrest mounting portion to which the armrest is attached, and an arm portion extending from the armrest mounting portion and fixed to the first side frame, The vehicle seat, wherein the armrest attachment portion is attached to the armrest so as to be located between the airbag device and the armrest.

3. The vehicle seat according to claim 1, The mounting member includes an inner mounting member and an outer mounting member that covers the outer side of the inner mounting member, the inner mounting member is fixed to the outer portion of the first side frame, The vehicle seat according to claim 1, wherein the outer mounting member is fixed to a flange portion of the first side frame that intersects with the outer portion of the first side frame.

4. The vehicle seat according to claim 3, The outer mounting member has a flat plate portion facing the flange portion and a reinforcing portion provided at a boundary of the flat plate portion, The vehicle seat according to claim 1, wherein the flat plate portion has a fixing portion that is fixed to the flange portion at a position spaced a predetermined distance from the reinforcing portion.

5. The vehicle seat according to claim 4, The armrest device further includes a reinforcing member for reinforcing the mounting state of the mounting member, The vehicle seat according to claim 1, wherein the reinforcing member is fixed to the flange portion so as to overlap the flat plate portion of the outer mounting member.

6. The vehicle seat according to claim 5, The vehicle seat, wherein the reinforcing member has a first fixing portion that clamps the flat plate portion with the flange portion, and a second fixing portion that clamps the flange portion with the flat plate portion.

7. The vehicle seat according to claim 6, The vehicle seat, wherein the first fixing portion is fastened to the flat plate portion and the flange portion in an overlapping state.

8. The vehicle seat according to claim 6, The vehicle seat, wherein the second fixing portion is fastened to the flange portion and the flat plate portion in an overlapping state.

9. The vehicle seat according to claim 6, the first side frame has a through hole in which a webbing clip for positioning a webbing that regulates the deployment direction of an airbag of the airbag device is disposed, The vehicle seat according to claim 1, wherein the reinforcing member further includes a third fixing portion near the through hole, the third fixing portion being fixable to an inner surface of the first side frame.

10. The vehicle seat according to claim 9, The vehicle seat, wherein the third fixing portion sandwiches the first side frame between the inner mounting member and is fastened in an overlapping state with the first side frame and the inner mounting member.

11. The vehicle seat according to claim 5, The seat back frame further includes an upper frame connecting the first and second side frames, The vehicle seat, wherein the reinforcing member is provided below a lower end portion of the upper frame.

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