Vehicle seat

Abstract

To provide a vehicle seat which achieves downsizing and weight reduction while securing rigidity of a seat support.SOLUTION: A seat support 60 of a vehicle seat has: left and right front foot members 61 which are attached spaced part from each other in a seat width direction on a vehicle body floor and extend so as to protrude upward from the vehicle body floor; and a foot connection member 63 which connects upper portions of the left and right front foot members 61 and is disposed so as to partially overlap with the left and right front foot members 61 in a vertical direction. Out of the front foot member 61, a facing wall part 61a which is disposed facing the foot connection member 63 in the vertical direction and left and right side wall parts 61b which continuously bend from both end portions as seen in the seat width direction of the facing wall part 61a and protrude so as to contact with the foot connection member 63, and the foot connection member 63 form a closed cross section structure.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a vehicle seat, and more particularly to a vehicle seat having a seat support member attached between a seat body and a vehicle floor, supporting the seat body from below. [Background technology]

[0002] Conventionally, in vehicle seats used in automobiles, etc., there has been known a vehicle seat that has a seat support between the seat body and the vehicle floor, with the aim of raising the seat surface position of the seat body to a predetermined height position from the vehicle floor surface in order to ensure a good seating comfort for the seated occupant (see, for example, Patent Document 1).

[0003] The vehicle seat equipped with the seat support body described in Patent Document 1 is mainly composed of left and right front leg portions attached to the vehicle floor at a distance in the seat width direction, left and right rear leg portions positioned behind the front leg portions, left and right cover members extending in the fore-and-aft direction of the seat to connect the front leg portions and rear leg portions, and a cross member extending in the seat width direction to connect the left and right cover members. In the above-described configuration, in order to increase the rigidity of the seat support body, a closed cross-sectional structure is formed by the cover member having an inverted U-shaped cross section and the cross member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-262721 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in a vehicle seat such as that described in Patent Document 1, in order to increase the rigidity of the seat support body, left and right cover members and cross members are attached to the left and right front leg portions and the left and right rear leg portions. However, this configuration increases the number of components and leads to an increase in the size and weight of the seat support body. Therefore, there has been a demand for a seat that can ensure the rigidity of the seat support while also making the seat support smaller and lighter. There has also been a demand for a vehicle seat that can reduce the number of components of the seat support and that allows the components to be arranged compactly.

[0006] The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide a vehicle seat having a seat support member arranged between the seat body and the vehicle floor, which can be made smaller and lighter while ensuring the rigidity of the seat support member. Another object of the present invention is to provide a vehicle seat that takes into consideration the compact arrangement of components of the seat support and the reduction in the number of components. [Means for solving the problem]

[0007] The above problem is solved by the vehicle seat of the present invention, which provides a vehicle seat comprising: a seat body having a seat cushion that serves as a seating area; and a seat support body that is attached to a vehicle floor and supports the seat body from below, wherein the seat support body has left and right foot members that are attached to the vehicle floor at a distance from each other in the seat width direction and extend so as to protrude upward from the vehicle floor, and foot connecting members that connect upper portions of the left and right foot members and are arranged so as to partially overlap the left and right foot members in the vertical direction or the front-to-rear direction of the seat, wherein the foot members have opposing wall portions that are arranged in a position opposite the foot connecting members in the vertical direction or the front-to-rear direction of the seat, and respective side wall portions that bend continuously from both end portions of the opposing wall and protrude toward the foot connecting member so as to abut against it, and the opposing wall portions, the respective side wall portions, and the foot connecting members form a closed cross-sectional structure in the foot member. With the above configuration, it is possible to realize a vehicle seat that can be made smaller and lighter than conventional seats while ensuring the rigidity of the seat support body. In more detail, the seat support body is constructed simply with left and right foot members and a foot connecting member, while also ensuring the rigidity of the seat support body, by forming a closed cross-sectional structure with the opposing wall portions of the foot members, their respective side wall portions, and the foot connecting member. Therefore, consideration is given not only to reducing the size and weight of the seat support, but also to compactly arranging the components of the seat support and reducing the number of components.

[0008] In this case, the foot member has a first opposing wall portion as the opposing wall portion that faces the foot connecting member in the vertical direction, and a second opposing wall portion that is arranged at a position that faces the foot connecting member in the seat fore-and-aft direction or the seat width direction, and a first closed cross-sectional structure is formed as the closed cross-sectional structure, and a second closed cross-sectional structure is formed in the foot member by the second opposing wall portion, each of the second side wall portions protruding from both end portions of the second opposing wall portion, and the foot connecting member. With the above-described configuration, the rigidity of the seat support body can be further improved despite the simple configuration.

[0009] In this case, it is preferable that both end portions of the foot connecting member in the seat width direction are formed to be wider than the central portion in the seat width direction, and are attached to the foot members, respectively. Preferably, the foot connecting member has a contact surface that contacts the foot member, the contact surface having a reinforcing portion that extends from a central portion toward both end portions in the seat width direction. In addition, it is preferable that the both end portions of the foot connecting member in the seat width direction at the seat rear end are formed to protrude further rearward than the central portion in the seat width direction, and that the reinforcing portion extend in the seat width direction along the seat rear end of the foot connecting member. With the above configuration, for example, it is possible to ensure the assembly rigidity of the seat support body (the assembly portion of the foot member and the foot connecting member) against an external load applied in a direction intersecting the seat front-rear direction.

[0010] In this case, by welding the outer peripheral portion of the part where the foot member and the foot connecting member abut, a weld mark is formed on at least one of the foot member and the foot connecting member, and the weld mark and the reinforcing portion are preferably positioned in a position aligned in the seat width direction. As described above, the reinforcing portion and the weld marks (welded reinforcing portions) are arranged in positions aligned in the seat width direction, so that the assembly rigidity of the seat support body can be further increased.

[0011] In this case, the foot connecting member has a protruding portion that protrudes outward in the seat width direction more than the foot member, and the outer peripheral portion of the part where the side wall portion of the foot member and the protruding portion of the foot connecting member abut in the vertical direction is preferably welded. As described above, since the foot connecting member has a protruding portion (remaining margin), when assembling the foot member and the foot connecting member, variations in the dimensions of the foot connecting member can be absorbed, improving assembly workability and ensuring quality in terms of assembly rigidity.

[0012] In this case, the seat support body has a front foot member and a rear foot member as foot members attached to the vehicle body floor at a distance in the fore-and-aft direction of the seat, the foot connecting member connects the left and right front foot members, and the rear foot member on the side of the left and right rear foot members where a belt anchor for fastening the seat belt is located has a reinforcing foot member attached to it that is positioned opposite the rear foot member in the up-and-down direction or the fore-and-aft direction of the seat, and the rear foot member and the reinforcing foot member preferably form a closed cross-sectional structure. With the above configuration, when a load is applied to the seat support body during a vehicle collision, the portion of the seat support body that is subjected to a particularly high load (the rear foot member on the side where the belt anchor is located) can be pinpoint reinforced, thereby achieving improved rigidity while preventing the seat support body from becoming larger or heavier.

[0013] In this case, the seat support body may include a lower rail attached to the upper surface of the foot member, and an upper rail supported so as to be movable relative to the lower rail and supporting the seat body from below, and the upper portion of the foot member may be positioned sandwiched between the lower rail and the foot connecting member in the vertical direction, and the portion of the foot member to which the lower rail is attached and the portion to which the foot connecting member is attached may be positioned so as to overlap in the vertical direction. With the above configuration, the number of components of the seat support body is reduced compared to conventional configurations, while the existing components of the seat (lower rails) are utilized, thereby improving the assembly rigidity of the seat support body (particularly the foot member).

[0014] Furthermore, the above problem is also solved by the vehicle seat of the present invention, which comprises a seat body having a seat cushion that serves as a seating area, a seat support body that is attached to the vehicle floor and supports the seat body from below, and a seat support frame that is arranged vertically between the seat body and the seat support body and supports the seat body from below, wherein the seat support body is attached to the vehicle floor at a distance from one another in the seat width direction and has left and right foot members that extend so as to protrude upward from the vehicle floor, and foot connecting members that connect upper portions of the left and right foot members and are arranged so as to partially overlap the left and right foot members in the vertical direction, and the upper portions of the foot members are connected to the seat support frame, and the upper portions of the foot members, the foot connecting members, and the seat support frame are arranged so as to partially overlap in the vertical direction. With the above configuration, it is possible to realize a vehicle seat that can be made smaller and lighter than conventional seats while ensuring the rigidity of the seat support body. In more detail, the seat support body is simply constructed with left and right foot members and foot connecting members, while also ensuring the rigidity of the seat support body, so that the upper parts of the foot members, the foot connecting members, and the seat support frame are arranged to overlap partially in the vertical direction. Therefore, consideration is given not only to reducing the size and weight of the seat support, but also to compactly arranging the components of the seat support and reducing the number of components. [Effects of the Invention]

[0015] According to the present invention, it is possible to realize a vehicle seat that can be made smaller and lighter than conventional seats while ensuring the rigidity (assembly rigidity) of the seat support body. Furthermore, the invention also takes into consideration compact arrangement of components of the seat support body and reduction in the number of components. Furthermore, according to the above invention, when assembling the foot member and the foot connecting member, it is possible to absorb variations in the dimensions of the foot connecting member, improving the ease of assembly work and ensuring quality in terms of assembly rigidity. Furthermore, according to the invention, the number of components of the seat support body is reduced compared to the prior art, while the existing components of the seat are utilized, thereby achieving an improvement in the assembly rigidity of the seat support body. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is an external perspective view of a vehicle seat according to an embodiment of the present invention; [Figure 2] FIG. 2 is a perspective view of a seat frame that serves as a framework. [Figure 3] FIG. 10 is a perspective view of the seat frame as seen from a different angle, showing an enlarged view of a main portion. [Figure 4] FIG. 2 is a side view of the seat frame, showing an enlarged view of a main part of the reinforcing pipe. [Figure 5] FIG. [Figure 6] FIG. 10 is a perspective view of the seat support member as seen from another angle, showing an enlarged view of a main portion. [Figure 7] FIG. 3 is a side view of the seat support body, showing an enlarged view of a main part. [Figure 8A] 8 is a cross-sectional view taken along line AA in FIG. 7, showing the closed cross-sectional structure of the seat support body. [Figure 8B] 8 is a cross-sectional view taken along line BB in FIG. 7, showing the closed cross-sectional structure of the seat support member. [Figure 9] 10A to 10C are perspective views of a seat support body according to a second embodiment. [Figure 10] FIG. 10 is a perspective view of the seat support from another angle, showing the front foot member. [Figure 11] FIG. 11 is an enlarged view of a main part of FIG. [Figure 12] FIG. 10 is a bottom view of the seat support showing the front foot members. [Figure 13]FIG. 10 is a perspective view of the seat support from another angle, showing the rear foot member. [Figure 14] FIG. 10 is a bottom view of the seat support showing the rear foot member. [Figure 15] FIG. 10 is a perspective view of a seat support member according to a third embodiment. [Figure 16] FIG. 10 is a perspective view of a seat support member according to a fourth embodiment. [Figure 17] FIG. 10 is a perspective view of a seat support member according to a fifth embodiment. [Figure 18] FIG. 13 is a perspective view of a seat support member according to a sixth embodiment. [Figure 19] FIG. 13 is a perspective view of a seat support member according to a seventh embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 8A and 8B. This embodiment relates to an invention of a vehicle seat that includes a seat support member attached between the seat body and the vehicle floor, the seat support member being attached to the vehicle floor at a distance in the seat width direction and having left and right foot members extending upward from the vehicle floor, and foot connecting members that connect the upper portions of the left and right foot members and are arranged so as to overlap the left and right foot members in the vertical and longitudinal directions of the seat, the foot members having opposing wall portions that are arranged in a position opposite the foot connecting members in the vertical and longitudinal directions of the seat, and left and right side wall portions that bend continuously from both end portions of the opposing wall portion in the seat width direction and protrude toward the foot connecting member so as to abut against the foot connecting member, and the opposing wall portions, left and right side wall portions, and foot connecting members form a closed cross-sectional structure in the foot member. The side of the vehicle seat where the occupant sits relative to the seat back is the front side of the seat.

[0018] The vehicle seat S of this embodiment is used as, for example, a front seat of an automobile. As shown in FIG. 1, the vehicle seat S is mainly composed of a seat body having a seat cushion 1 and a seat back 2, and as shown in FIG. 2, a reclining device 30 that rotatably connects the seat back 2 to the seat cushion 1, a height link device 40 that connects the seat body to the vehicle floor so that it can be raised and lowered, and a rail device 50 that supports the seat body so that it can move back and forth relative to the vehicle floor. 1 and 2, the vehicle seat S further includes a seat support member 60 that is attached to the vehicle floor and supports the seat body from below. Specifically, the seat support member 60 is disposed between the rail device 50 and the vehicle floor in the vertical direction.

[0019] As shown in FIG. 1, the seat cushion 1 is a seating portion that supports an occupant from below, and is configured by placing a cushion pad 1a on a cushion frame 10 shown in FIG. 2, which serves as a skeleton, and covering the cushion pad 1a with a skin material 1b. The seat back 2 is a backrest portion that supports the back of the occupant from behind, and is configured by placing a cushion pad 2a on a back frame 20 shown in Figure 2, which serves as the skeleton, and covering it with a skin material 2b. As shown in FIG. 2, a belt anchor 3 for anchoring a seat belt is attached to the outside of the seat cushion 1 in the seat width direction.

[0020] As shown in Figures 2 to 4, the cushion frame 10 is a roughly rectangular frame-like body and is mainly composed of side frames 11 arranged on the left and right sides, a plate-shaped pan frame 12 connecting the front portions of each side frame 11, a pipe-shaped rear connecting frame 13 connecting the rear portions of each side frame 11, a plurality of elastic springs 14 hooked onto the pan frame 12 and the rear connecting frame 13 and extending in a snake-like shape, and a pipe-shaped reinforcing connecting frame 15 connecting the rear portions of each side frame 11 behind the rear connecting frame 13. The side frame 11 is a sheet metal member that extends in the fore-and-aft direction of the seat and has a generally I-shaped vertical cross section. A reclining device 30 is attached to the rear part of the side frame 11, and a rail device 50 is attached to the lower part of the side frame 11 via a height link device 40.

[0021] As shown in Figures 2 to 4, the back frame 20 is a substantially rectangular frame body and is mainly composed of back side frames 21 arranged on the left and right sides, an inverted U-shaped upper frame 22 connecting the upper end portions of each back side frame 21, a plate-shaped lower frame 23 connecting the lower end portions of each back side frame 21, a plurality of elastic springs 24 hooked onto the upper frame 22 and the lower frame 23, respectively, and extending in the vertical direction, and a plate-shaped frame 25 supported by the elastic springs 24. The backside frame 21 is a sheet metal member that extends in the vertical direction and has a generally U-shaped cross section, and its lower end portion is connected to the rear end portion of the side frame 11 via a mounting bracket 26 and a reclining device 30. In this state, the back frame 20 can rotate relative to the cushion frame 10.

[0022] As shown in Figures 2 and 4, the reclining device 30 can be switched between a locked state, in which the rotational movement of the back frame 20 is locked, and an unlocked state. When the back frame 20 is locked in a predetermined upright position, the locked state can be released by operating a reclining operation lever (not shown), and the upright position of the back frame 20 can be adjusted. Specifically, the reclining device 30 is mainly composed of a back rotation shaft 31 and a spiral spring 32 that biases the back frame 20 so as to rotate forward about the back rotation shaft 31. The back rotation shaft 31 is supported in the seat width direction on the back frame 20 side (back side frame 21) and on the cushion frame 10 side (side frame 11). The spiral spring 32 is configured so that one end thereof is engaged with a spring locking bracket 33 attached to the outer surface of the back side frame 21, and the other end thereof is engaged with a spring locking member 34 attached to the outer surface of the side frame 11.

[0023] As shown in Figure 2, the height link device 40 is attached between the cushion frame 10 and the rail device 50, and is equipped with left and right front links 41 located on the front side of the seat and left and right rear links 42 located on the rear side of the seat, and the rear links 42 act as driving links to adjust the height of the seat body. At the connecting portion of the right rear link 42 on the cushion frame 10 (side frame 11) side, a sector gear portion 42a as a gear is formed on part of the outer periphery, and is engaged with a pinion gear provided on a brake unit (not shown).

[0024] As shown in FIG. 2, the height link device 40 includes a brake rotation shaft 43 that is pivotally supported on the side of the side frame 11 in the seat width direction and protrudes outward, a brake unit (not shown) that is rotatably attached via the brake rotation shaft 43 and regulates the raising and lowering movement of the seat body, and a height operation lever (not shown) that is rotatably attached via the brake rotation shaft 43 and the brake unit and raises and lowers the seat body. The brake unit is attached to the outer surface of the side frame 11.

[0025] In the above configuration, when a height control lever (not shown) is operated, the pinion gear rotates integrally with the brake rotation shaft 43, changing the meshing position of the pinion gear and the sector gear portion 42a. Furthermore, the right rear link 42 on which the sector gear portion 42a is formed rotates, and following the right rear link 42, the left rear link 42 and the left and right front links 41 also rotate. This causes the seat body to rise and fall, adjusting the seat height.

[0026] As shown in FIG. 2, the rail device 50 is mainly composed of left and right lower rails 51 fixed to the upper surface of the seat support body 60 and extending in the front-to-rear direction of the seat, left and right upper rails 52 supported slidably along the lower rails 51, a locking member (not shown) that locks the upper rails 52 so that they cannot slide, and a rail operating lever 53 that releases the locked state of the locking member. The upper rail 52 is a long body that is inserted into the storage space of the lower rail 51 and slides along the lower rail 51, and its upper end portion is connected to the cushion frame 10 side via a connecting bracket 54. The connecting bracket 54 is made of a sheet metal member having an L-shaped vertical cross section that extends in the front-rear direction of the seat, and is a member that connects the upper rail 52 and the links 41, 42 on the cushion frame 10 side in the vertical direction. Of the left and right connecting brackets 54, the left connecting bracket 54, which is on the side opposite to the right rear link 42 (driving link), is fitted with a belt anchor 3 for fastening a seat belt.

[0027] As shown in Figures 2 and 5, the seat support body 60 is a member for raising the seating position of the seat body to a predetermined height, and specifically, is mainly composed of left and right front foot members 61 and left and right rear foot members 62 that are attached to the vehicle floor at intervals in the seat width direction and extend upward from the vehicle floor, a foot connecting member 63 that connects the upper parts of the left and right front foot members 61, and a reinforcing foot member 64 that is attached to the left rear foot member 62 and is positioned opposite the rear foot member 62 in the vertical direction. The reinforcing foot member 64 is attached to the left rear foot member 62, which is located on the side where the belt anchor 3 is disposed, out of the left and right rear foot members 62.

[0028] As shown in Figures 5 to 7, the front foot member 61 is a vertically long member with a roughly U-shaped cross section for mounting on the vehicle floor, with its upper portion sandwiched between the lower rail 51 and the foot connecting member 63 in the vertical direction, and its lower portion abutting against the vehicle floor surface. The rear foot member 62 has the same configuration as the front foot member 61, and the front foot member 61 and the rear foot member 62 are arranged symmetrically in the front-rear direction with the seat body as the center.

[0029] The front foot member 61 extends from its lower portion toward its upper portion, sloping toward the rear of the seat, and has a first opposing wall portion 61a at its upper end portion positioned opposite the foot connecting member 63 in the vertical direction, and left and right first side wall portions 61b that bend downward continuously from both left and right end portions of the first opposing wall portion 61a and protrude so as to abut against the foot connecting member 63. The front foot member 61 also has a second opposing wall portion 61c that extends in the vertical direction and is positioned opposite the foot connecting member 63 in the fore-and-aft direction of the seat, and left and right second side wall portions 61d that bend rearward continuously from both left and right end portions of the second opposing wall portion 61c and protrude so as to abut against the foot connecting member 63. The first opposing wall portion 61a is a wall portion that extends in the fore-and-aft direction of the seat and has a horizontal surface, and the second opposing wall portion 61c is a wall portion that extends at an angle toward the front of the seat in the up-and-down direction and has an inclined surface, and the first opposing wall portion 61a and the second opposing wall portion 61c are formed continuously.

[0030] A rail mounting portion 61e for mounting the front portion of the lower rail 51 is formed on the upper surface of the first opposing wall portion 61a, and a floor mounting portion 61f for mounting to the vehicle floor is formed on the inclined flat surface of the second opposing wall portion 61c. The rail mounting portion 61e has a mounting hole that penetrates in the vertical direction, and is connected to the lower rail 51 using a fastening bolt and a fastening nut (not shown). Similarly, the floor mounting portion 61f has a mounting hole penetrating the second opposing wall portion 61c, and is mounted to the vehicle floor using a fastening bolt or the like (not shown). The floor mounting portion 61f is formed on a recessed portion (reinforcing recess) that is recessed one step below the inclined plane of the second opposing wall portion 61c in order to increase the mounting rigidity with the vehicle body floor.

[0031] As shown in Figures 5 to 7, the foot connecting member 63 is a reinforcing member that is elongated in the seat width direction and has a generally L-shaped vertical cross section for connecting the left and right front foot members 61, and is positioned so that it partially overlaps with the left and right front foot members 61 in the vertical direction and the front-to-rear direction of the seat. Specifically, the foot connecting member 63 has an upper wall portion 63a that is arranged at a position opposite the first opposing wall portion 61a of the front foot member 61, a front wall portion 63b that bends downward and protrudes continuously from the front end portion of the upper wall portion 63a and is arranged at a position opposite the second opposing wall portion 61c, and a bottom wall portion 63c that bends backward and protrudes continuously from the lower end portion of the front wall portion 63b.

[0032] The upper wall portion 63a and the front wall portion 63b are each formed so that both end portions in the seat width direction are wider than the central portion, and both end portions are attached to the front foot member 61 by welding. Specifically, at the rear end of the upper wall portion 63a, both end portions in the seat width direction are formed to protrude further rearward than the central portion, and at the lower end of the front wall portion 63b, both end portions in the seat width direction are formed to protrude downward than the central portion.

[0033] Left and right reinforcing beads 63d (reinforcing portions) extending from the center toward both ends in the seat width direction are formed on the upper surface of the upper wall portion 63a that abuts against the front foot member 61 (first opposing wall portion 61a). The reinforcing beads 63d extend in a serpentine manner in the seat width direction along the seat rear end of the upper wall portion 63a. In addition, by welding the outer peripheral portion of the upper wall portion 63a where it abuts against the front foot member 61 (the left and right first side wall portions 61b), a first weld mark 63e is formed on the outer peripheral portion (at least one portion of the upper wall portion 63a and the front foot member 61). In the above, the reinforcing bead 63d and the first weld mark 63e are arranged in positions aligned in the seat width direction. In addition, in the front wall portion 63b, the outer circumferential portion of the portion that abuts against the front foot member 61 (the left and right second side wall portions 61d) is welded, so that a second weld mark 63f is formed in the outer circumferential portion (at least one portion of the front wall portion 63b and the front foot member 61).

[0034] In the above configuration, as shown in Figures 7 and 8A, the first opposing wall portion 61a of the front foot member 61, the left and right first side wall portions 61b, and the upper wall portion 63a of the foot connecting member 63 overlap in the vertical direction to form a closed cross-sectional structure (first closed cross-sectional structure). Also, as shown in Figures 7 and 8B, the second opposing wall portion 61c of the front foot member 61, the left and right second side wall portions 61d, and the front wall portion 63b of the foot connecting member 63 overlap in the fore-and-aft direction of the seat, thereby forming a second closed cross-sectional structure. Therefore, the rigidity of the seat support 60 can be improved despite the simple configuration.

[0035] In the above configuration, as shown in FIG. 5, the rear foot member 62 having an inverted U-shaped cross section and the reinforcing foot member 64 having a U-shaped cross section overlap each other to form a sandwich structure. Specifically, the first opposing wall portion 62a of the rear foot member 62, the left and right first side wall portions 62b, and the reinforcing foot member 64 overlap in the vertical direction to form a closed cross-sectional structure (third closed cross-sectional structure). Additionally, a fourth closed cross-sectional structure is formed by overlapping the second opposing wall portion 62c of the rear foot member 62, the left and right second side wall portions 62d, and the reinforcing foot member 64 in the seat front-rear direction. Furthermore, the third closed cross-sectional structure and the fourth closed cross-sectional structure are formed continuously. Therefore, the rigidity of the seat support body 60 can be further improved.

[0036] In the above configuration, as shown in FIG. 5, the top surface portion of the front foot member 61 to which the lower rail 51 is attached and the bottom surface portion to which the foot connecting member is attached are arranged in positions that overlap in the vertical direction. By using the existing component (lower rail 51) as described above, it is possible to improve the assembly rigidity of the seat support body 60 without increasing the number of components of the seat support body 60.

[0037] In the above configuration, as shown in FIG. 5, the foot connecting member 63 has a protruding portion 63g that protrudes outward in the seat width direction beyond the front foot member 61, and the outer peripheral portions of the portions where the protruding portion 63g abuts against the side wall portions 61b, 61d of the front foot member 61 in the vertical direction are welded. As described above, since the foot connecting member 63 has the protruding portion 63g (remaining margin), when assembling the front foot member 61 and the foot connecting member 63, variations in the dimensions of the foot connecting member 63 can be absorbed, leading to uniform quality.

[0038] <Details of the reinforcing connection frame> As shown in Figures 2 to 4, the reinforcing connecting frame 15 is a connecting pipe that reinforces the rear portion of the cushion frame 10, and more specifically, is provided as a reinforcing structure to withstand external side collision loads. The reinforcing connecting frame 15 is positioned rearward of the seat and lower than the rear connecting frame 13, and extends to connect the left and right side frames 11 while abutting against the cutout portions 11a formed at the lower ends of the left and right side frames 11. More specifically, the outer periphery of the portion where the reinforcing connection frame 15 and the cutout portion 11a come into contact is welded, so that a weld mark 15a is formed on the outer periphery.

[0039] With the above configuration, in the past, the reinforcing connecting frame 15 was connected so as to penetrate the side surfaces of the left and right side frames 11, which meant that the side frames 11 had to be larger in the fore-and-aft and up-and-down directions of the seat in order to ensure installation space for the reinforcing connecting frame 15 (see, for example, JP 2012-66800 A).However, with the present invention, it is possible to suppress the increase in size of the seat (the increase in size of the cushion frame 10).

[0040] In the above configuration, as shown in FIG. 3, the lower end of the side frame 11 is formed with a reinforcing portion 11b (reinforcing flange) that protrudes to one side (inner side) in the seat width direction. Therefore, the assembly rigidity between the side frame 11 and the reinforcing connecting frame 15 can be increased.

[0041] In the above configuration, as shown in FIG. 3, the reinforcing connecting frame 15 has protruding portions 15b that protrude outward in the seat width direction beyond the left and right side frames 11. This not only increases the rigidity of the reinforcing connecting frame 15, but also allows the reinforcing connecting frame 15 to have a margin, which makes it possible to absorb variations in the dimensions of the reinforcing connecting frame 15 when connecting the left and right side frames 11, leading to uniform quality.

[0042] <Second embodiment of vehicle seat> Next, a second embodiment of the vehicle seat will be described with reference to FIGS. It should be noted that the description of the same content as that of the vehicle seat S described above will be omitted. The vehicle seat S2 of the second embodiment includes a seat support 160 instead of the seat support 60.

[0043] The seat support body 160 is mainly composed of left and right front foot members 161, left and right rear foot members 162, a foot connecting member 163 that connects the upper parts of the left and right front foot members 161, and a reinforcing foot member 164 that is attached to the left rear foot member 162 and positioned opposite the rear foot member 162 in the vertical direction.

[0044] As shown in FIGS. 9 to 12, the front foot member 161 has a first opposing wall portion 161a, left and right first side wall portions 161b, a second opposing wall portion 161c, and left and right second side wall portions 161d. A rail mounting portion 161e is formed on the upper surface of the first opposing wall portion 161a, and a floor mounting portion 161f is formed on the inclined flat surface of the second opposing wall portion 161c.

[0045] The foot connecting member 163 has an upper wall portion 163a, a front wall portion 163b, and a bottom wall portion 163c that is continuous with the lower end portion of the front wall portion 163b, bends backward, and protrudes.

[0046] A first reinforcing bead 163d (reinforcing portion) extending elongately in the seat width direction is formed on the upper surface of the upper wall portion 163a that abuts against the front foot member 161. Furthermore, the curved surface of the front wall portion 163b that abuts against the front foot member 161 is formed with left and right second reinforcing beads 163h that extend from the center toward both end portions in the seat width direction. 10 to 12, a through hole 163i is formed in the upper surface of the upper wall portion 163a at a position facing the rail mounting portion 161e. The through hole 163i is a hole that penetrates in the vertical direction and functions as a tool hole when fastening the lower rail 51 and the front foot member 161 with a fastening bolt and a fastening nut (not shown).

[0047] Left and right bent portions 163j are formed at both end portions in the seat width direction of the upper wall portion 163a and the front wall portion 163b, which are bent downward and project continuously from the end portions. Also, a notch 163k is formed in the approximate center of the bent portion 163j in the extending direction, the notch 163k being cut out toward the inside in the sheet width direction. By forming the notch 163k, the bent portion 163j is divided into two in the front-rear direction of the seat, and a space is formed between the two divided bent portions 163j.

[0048] In the above configuration, as shown in FIGS. 10 to 12, a through hole 163i is formed in the upper surface of the upper wall portion 163a of the foot connecting member 163 at a position opposite to the rail mounting portion 161e. Therefore, the workability of assembling the lower rail 51 to the lower rail 51 can be improved while suppressing a decrease in rigidity that would otherwise occur due to the formation of the through holes 163i.

[0049] In the above configuration, as shown in FIGS. 10 to 12, the first reinforcing bead 163d is formed at a position overlapping the through hole 163i in the seat width direction. Therefore, the first reinforcing bead 163d can reinforce the area around the through hole 163i, and the rigidity of the seat support 160 can be prevented from decreasing.

[0050] In addition, in the above configuration, as shown in Figures 9 to 11, left and right bending portions 163j are formed at both ends of the upper wall portion 163a and the front wall portion 163b in the seat width direction, which are bent and protrude toward the opposite side from the front foot member 161 side. Therefore, the rigidity of the seat support 160 can be improved while preventing it from becoming large in size in the seat width direction.

[0051] In the above configuration, as shown in FIGS. 11 and 12, the bent portion 163j is formed at a position overlapping with the through hole 163i in the sheet width direction. Therefore, the bent portion 163j can reinforce the area around the through-hole 163i, and the rigidity of the seat support 160 can be prevented from decreasing.

[0052] 10 to 12, the front foot member 161 and the foot connecting member 163 are welded together to form a first weld mark 163e and a second weld mark 163f. At this time, the first weld mark 163e is formed at a position overlapping with the through hole 163i in the seat width direction. Therefore, the welding (weld bead) can reinforce the area around the through-hole 163i, and the reduction in rigidity of the seat support 160 can be suppressed.

[0053] In the above configuration, as shown in FIGS. 9 and 10, the curved surface of the front wall portion 163b that abuts against the front foot member 161 is formed with left and right second reinforcing beads 163h. More specifically, the second reinforcing bead 163h is formed as a reinforcing recess that is recessed on the side opposite to the front foot component 161 side. Therefore, it is possible to easily form the mating surfaces of the foot connecting member 163 and the front foot member 161, and also to increase the rigidity of the seat support member 160.

[0054] In the above configuration, as shown in FIGS. 11 and 12, the outer end of the second reinforcing bead 163h is formed at a position that overlaps with the through-hole 163i in the seat front-rear direction. Therefore, the second reinforcing bead 163h can reinforce the area around the through hole 163i, and the rigidity of the seat support 160 can be prevented from decreasing.

[0055] In the above configuration, as shown in FIG. 9, the bent portion 163j extends along the outer edge of the front foot member 161, and a notch 163k is formed in the approximate center of the extending direction of the bent portion 163j. Providing the cutout portion 163k in this manner makes it easier to form the bent portion 163j, that is, it becomes easier to form the bent portion 163j so that it does not protrude outward in the sheet width direction.

[0056] In the above configuration, as shown in FIGS. 9 and 12, the second reinforcing bead 163h is formed at a position overlapping (aligned with) the notch portion 163k in the seat width direction. Therefore, the second reinforcing bead 163h can reinforce the area around the notch 163k, and the rigidity of the seat support 160 can be prevented from decreasing.

[0057] In the above configuration, as shown in FIG. 9, the through-hole 163i and the cutout portion 163k are arranged at different positions in the seat width direction and the seat front-rear direction. Therefore, it is possible to prevent the rigidity of the seat support 160 from decreasing due to the formation of the through holes 163i and the cutout portions 163k.

[0058] In the above configuration, as shown in FIG. 12, the outer end of the bottom wall portion 163c of the foot connecting member 163 is disposed at a position overlapping with the through-hole 163i in the seat front-rear direction. Therefore, the bottom wall portion 163c can reinforce the area around the through-hole 163i, and the rigidity of the seat support 160 can be prevented from decreasing.

[0059] In the above configuration, as shown in FIG. 12, the outer end of the first reinforcing bead 163d and the inner end of the second reinforcing bead 163h are arranged at positions where they overlap in the seat front-rear direction. By arranging the reinforcing beads so that they overlap each other in this manner, the rigidity of the seat support body 160 (foot connecting member 163) can be improved.

[0060] In the above configuration, as shown in FIGS. 13 and 14, a through hole 164i is formed in the reinforcing foot member 164 at a position facing the rail mounting portion 162e provided on the rear foot member 162. Therefore, the workability of assembling the lower rail 51 can be improved.

[0061] <Third embodiment of vehicle seat> Next, a third embodiment of the vehicle seat will be described with reference to FIG. The vehicle seat S3 of the third embodiment includes a seat support 260 instead of the seat support 60. The seat support body 260 includes left and right front foot members 261, a central front foot member 265 disposed between the left and right front foot members 261, and a foot connecting member 263 connecting the upper portions of the left and right front foot members 261 and the central front foot member 265.

[0062] The central front foot member 265 has a shape similar to that of the right front foot member 261, and is attached to the foot connecting member 263 in the same manner as the left and right front foot members 261. With the above configuration, the seat support body 260 can be more firmly fixed to the vehicle body floor. Furthermore, with the above configuration, for example, it is also possible to fix only the central front foot member 265, out of the left and right front foot members 261 and the central front foot member 265, to the vehicle floor. In this case, the workability of installing the seat support member 260 can be improved.

[0063] <Fourth embodiment of vehicle seat> Next, a fourth embodiment of the vehicle seat will be described with reference to FIG. The vehicle seat S4 of the fourth embodiment includes a seat support 360 instead of the seat support 60. The seat support body 360 includes left and right front foot members 361, a foot connecting member 363 that connects the upper portions of the left and right front foot members 361, and a regulating member 365 that is attached to the front of the foot connecting member 363 and positioned between the left and right front foot members 361.

[0064] The restricting member 365 is a substantially U-shaped wire member for restricting the intrusion of fallen objects or foreign matter that have fallen below the seat. The restricting member 365 extends downward from the center of the foot connecting member 363 in the seat width direction toward the vehicle body floor. The above-described configuration can prevent the falling objects and foreign objects from entering the interior of the seat, and can also prevent stored items from flying out of the storage space provided below the seat. The restricting member 365 is not limited to a wire member and may be modified, for example, a plate-like member, etc. When a plate-like member is used as the restricting member 365, it is preferable to form a plurality of holes on the side surface of the plate-like member, which allows for weight reduction.

[0065] <Fifth embodiment of vehicle seat> Next, a fifth embodiment of the vehicle seat will be described with reference to FIG. The vehicle seat S5 of the fifth embodiment includes a seat support 460 instead of the seat support 60. The seat support body 460 includes left and right front foot members 461, left and right rear foot members 462, a foot connecting member 463 connecting the upper portions of the left and right front foot members 461, and a second foot connecting member 465 connecting the upper portions of the front foot members 461 and rear foot members 462.

[0066] The second foot connecting member 465 is a plate-shaped member that is long in the front-rear direction of the seat, and is attached to the outer surfaces of the front foot member 461 and the rear foot member 462 by welding. A plurality of through holes 465a are formed on the outer surface of the second foot connecting member 465 at predetermined intervals in the front-rear direction of the seat. With the above configuration, the rigidity of the seat support 460 can be improved. Furthermore, by forming a plurality of through holes 465a as described above, the weight of the seat support 460 can be reduced. The second foot connecting member 465 is not particularly limited to a plate-shaped member, but may be a pipe member or a wire member.

[0067] <Sixth embodiment of vehicle seat> Next, a sixth embodiment of the vehicle seat will be described with reference to FIG. The vehicle seat S6 of the sixth embodiment includes a seat support 560 instead of the seat support 60. The seat support 560 includes left and right front foot members 561 and a foot connecting member 563 that connects the upper portions of the left and right front foot members 561 together.

[0068] The foot connecting member 563 has a first foot connecting portion 563a in the shape of a square pipe that connects the first opposing wall portions 561a of the left and right front foot members 561, and a second foot connecting portion 563b in the shape of a square pipe that connects the second opposing wall portions 561c of the left and right front foot members 561. The first foot connecting portion 563a and the second foot connecting portion 563b are each attached to the front foot member 561 by welding. With the above-described configuration, the rigidity of the seat support 560 can be increased with a simple shape. Although the first foot connecting portion 563a and the second foot connecting portion 563b have a square pipe shape, they are not particularly limited to this, and may have, for example, a round pipe shape.

[0069] Seventh embodiment of vehicle seat Next, a seventh embodiment of the vehicle seat will be described with reference to FIG. The vehicle seat S7 of the sixth embodiment includes a seat support 660 instead of the seat support 60. The seat support 660 includes left and right rear foot members 662 and a rear foot connecting member 665 that connects upper portions of the left and right rear foot members 662 together. The rear foot connecting member 665 has a shape similar to that of the foot connecting member 163 of the second embodiment, and connects the left and right rear foot members 662 together in the same manner as the foot connecting member 163. With the above configuration, the rigidity of the seat support 660 can be increased.

[0070] <Other embodiments> In the above embodiment, as shown in FIG. 2, the vehicle seat S is configured with a height link device 40 and a rail device 50, but this is not necessarily required. For example, the seat support 60 fixed to the vehicle floor and the cushion frame 10 may be directly connected.

[0071] In the above embodiment, as shown in FIG. 5, the upper portion of the front foot member 61 is positioned opposite the foot connecting member 63 in the vertical direction and the seat front-rear direction, but this is not particularly limited and can be changed, and the upper portion of the front foot member 61 may be positioned opposite the foot connecting member 63 only in the vertical direction, or only in the seat front-rear direction.

[0072] In the above embodiment, as shown in FIG. 5, the front foot member 61 extends from its lower portion toward its upper portion while slanting toward the rear of the seat, but is not particularly limited thereto, and may, for example, extend from its lower portion toward its upper portion while slanting inward or outward in the seat width direction. In such a case, it is desirable that the front foot member 61 has an opposing wall portion that is positioned opposite the foot connecting member 63 in the vertical and seat width directions, and front and rear side wall portions that bend continuously from both front and rear end portions of the opposing wall portion and protrude so as to abut against the foot connecting member 63.

[0073] In the above embodiment, as shown in FIG. 5, the foot connecting member 63 is positioned below the left and right front foot members 61 to connect the left and right front foot members 61, but is not particularly limited thereto and may be positioned above the left and right front foot members, for example. In such a case, it is desirable that the foot connecting member 63 be sandwiched between the lower rail 51 and the left and right front foot members in the vertical direction.

[0074] In the above embodiment, a vehicle seat used in an automobile was described as a specific example, but the present invention is not limited to this and can also be used as a vehicle seat for trains, buses, etc., as well as airplanes, ships, etc.

[0075] In this embodiment, the vehicle seat according to the present invention has been mainly described. However, the above embodiment is merely an example for facilitating understanding of the present invention, and does not limit the present invention. The present invention can be modified and improved without departing from the spirit thereof, and the present invention naturally includes equivalents thereof. In particular, the arrangement and configuration of the seat support member described in the above embodiment is merely an example and does not limit the present invention. [Explanation of symbols]

[0076] S, S2, S3, S4, S5, S6, S7 Vehicle Seats 1 seat cushion 1a, 2a, cushion pad 1b, 2b, skin material 2 seat backs 3 Belt Anchor 10 Cushion Frame 11 Side frame 11a Notch 11b Reinforcement part (reinforcement flange) 12 Pan Frame 13 Rear connecting frame 14 Elastic Spring 15 Reinforced connecting frame 15a Weld marks 15b Protruding part 20 Back Frame 21 Backside Frame 22 Upper frame 23 Lower frame 24 Elastic Spring 25 Plate Frame 26 Mounting bracket 30 Reclining device 31 Back rotation axis 32 Spiral Spring 33 Spring locking bracket 34 Spring locking member 40 Height Link Device 41 forward link 42 Rear link (driving link) 42a Sector gear part 43 Brake rotating shaft 50 Rail device (seat support frame) 51 Lower rail 52 Upper Rail 53 Rail operation lever 54 Connecting bracket 60,160,260,360,460,560,660 Seat support 61,161,261,361,461,561 Front foot member (foot member) 61a, 161a, 561a 1st opposing wall part 61b,161b 1st side wall part 61c,161c,561c 2nd opposing wall 61d,161d 2nd side wall part 61e,161e Rail mounting part 61f,161f Floor mounting part 62,162,462,662 Rear foot member 62a First opposing wall portion 62b First side wall part 62c 2nd opposing wall 62d 2nd side wall part 162e Rail mounting part 63,163,263,363,463,563 Foot connecting member 63a,163a Upper wall part 63b,163b Front wall 63c,163c Bottom wall part 63d, 163d Reinforcement bead, first reinforcing bead (reinforcement part) 63e,163e First welding mark 63f, 163f Second welding mark 63g, 163g protruding part 163h Second reinforcing bead 163i through hole 163j Bending part 163k Notch 563a First foot connection 563b Second foot connection 64,164 Reinforced foot member 164i through hole 265 Center front foot member 365 Regulatory components 465 Second foot connecting member 465a through hole 665 Rear foot connecting member

Claims

1. a seat body having a seat cushion serving as a seating portion; A vehicle seat including a seat support attached to a vehicle floor and supporting the seat body from below, The seat support is left and right foot members attached to the vehicle floor at intervals in the seat width direction and extending upward from the vehicle floor; a foot connecting member that connects upper portions of the left and right foot members and is arranged so as to partially overlap the left and right foot members in the up-down direction or the seat front-rear direction, The foot member is an opposing wall portion disposed at a position opposing the foot connecting member in the up-down direction or the seat front-rear direction; and side wall portions that are bent continuously from both end portions of the opposing wall portions and project toward the foot connecting member so as to abut against each other, A vehicle seat, wherein the opposing wall portions, the respective side wall portions, and the foot connecting member form a closed cross-sectional structure in the foot member.

2. The foot member is a first opposing wall portion as the opposing wall portion that faces the foot connecting member in the up-down direction; a second opposing wall portion disposed at a position opposing the foot connecting member in the seat front-rear direction or the seat width direction, The vehicle seat of claim 1, characterized in that a first closed cross-sectional structure is formed as the closed cross-sectional structure, and a second closed cross-sectional structure is formed by the second opposing wall portion of the foot member, each of the second side wall portions protruding from both end portions of the second opposing wall portion, and the foot connecting member.

3. The vehicle seat according to claim 1 or 2, characterized in that the foot connecting member has both end portions in the seat width direction formed to be wider than the central portion in the seat width direction, and each is attached to the foot member.

4. The vehicle seat according to any one of claims 1 to 3, characterized in that a reinforcing portion is formed on the contact surface of the foot connecting member that contacts the foot member, extending from the center portion toward both end portions in the seat width direction.

5. the foot connecting member has both end portions in the seat width direction at the seat rear end formed to protrude further rearward than the center portion in the seat width direction, 5. The vehicle seat according to claim 4, wherein the reinforcing portion extends in the seat width direction along the seat rear end of the foot connecting member.

6. The outer periphery of the portion where the foot member and the foot connecting member abut is welded, so that a weld mark is formed on at least one of the foot member and the foot connecting member, 6. The vehicle seat according to claim 4, wherein the weld marks and the reinforcing portions are arranged in positions aligned in the seat width direction.

7. the foot connecting member has a protruding portion that protrudes outward in the seat width direction beyond the foot member, A vehicle seat as described in any one of claims 1 to 6, characterized in that the outer peripheral portion of the part where the side wall portion of the foot member and the protruding portion of the foot connecting member abut in the vertical direction is welded.

8. The seat support body includes a front foot member and a rear foot member as the foot members attached to the vehicle body floor at an interval in the seat front-rear direction, the foot connecting member connects the left and right front foot members, A reinforcing foot member is attached to the rear foot member on the side where a belt anchor for fastening a seat belt is disposed, and the reinforcing foot member is disposed at a position opposite the rear foot member in the up-down direction or the seat front-rear direction, 8. The vehicle seat according to claim 1, wherein the rear foot member and the reinforcing foot member form a closed cross-sectional structure.

9. a lower rail of the seat support body attached to an upper surface of the foot member; an upper rail that is supported so as to be movable relative to the lower rail and that supports the seat body from below; an upper portion of the foot member is disposed between the lower rail and the foot connecting member in the vertical direction; and 9. The vehicle seat according to claim 1, wherein the portion of the foot member to which the lower rail is attached and the portion to which the foot connecting member is attached are positioned so as to overlap in the vertical direction.

10. a seat body having a seat cushion serving as a seating portion; a seat support attached to a vehicle floor and supporting the seat body from below; a seat support frame disposed between the seat body and the seat support member in the up-down direction and supporting the seat body from below, The seat support is left and right foot members attached to the vehicle floor at intervals in the seat width direction and extending upward from the vehicle floor; a foot connecting member that connects upper portions of the left and right foot members and is arranged so as to overlap the left and right foot members in the up-down direction; an upper portion of the foot member and the seat support frame are connected; A vehicle seat, characterized in that an upper portion of the foot member, the foot connecting member, and the seat support frame are arranged so as to partially overlap in the vertical direction.

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