Seat slide structure and vehicle seat

Abstract

To provide a seat slide structure which can be formed compact in a height direction in a state where a strength is maintained with a simple configuration and a vehicle seat.SOLUTION: An upper rail 22 slid along a lower rail 20 in a vehicle longitudinal direction covers the lower rail 20 from the outside. A lifter link 18 is directly attached to the upper rail 22. Thus, a riser for attaching the lifter link 18 to the upper rail 22 is made unnecessary, accordingly enabling thinning of a vehicle seat 16. Directly attaching the lifter link 18 to the upper rail 22 enables maintenance of a strength with a simpler configuration than when machining such as welding or cutting-up is carried out for the upper rail 22.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a seat slide structure and a vehicle seat. [Background technology]

[0002] In recent years, there has been a demand for vehicle seats to be more compact in the height direction. For example, the following Patent Document 1 discloses a technology that includes a lower rail that is fixed to the floor of the vehicle, extends along the front-rear direction of the vehicle, and has a groove in the center in the width direction, and an upper rail that engages with the groove and is slidable in the front-rear direction of the vehicle relative to the lower rail, and a link for adjusting the height of a cushion frame that constitutes the framework of the seat cushion is attached to the upper rail.

[0003] In this prior art, the seat frame to which the link is attached is fixed to the upper rail by welding. Alternatively, a mounting portion is formed by cutting out the upper wall of the upper rail, and the seat frame is fixed to the mounting portion by pins, bolts, welding, etc. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5651188 Summary of the Invention [Problem to be solved by the invention]

[0005] As described above, in the above-mentioned prior art, the upper rail needs to be processed by welding, cutting, etc., which increases the number of processing steps and leads to increased costs. In addition, the attachment portion of the link is a welded part or a cut-and-raised portion, which raises concerns about strength.

[0006] In consideration of the above, an object of the present invention is to provide a seat slide structure and a vehicle seat that can be formed compactly in the height direction while maintaining strength with a simple configuration. [Means for solving the problem]

[0007] The seat slide structure of the first aspect comprises a pair of left and right lower rails fixed to a floor portion of the vehicle along the fore-and-aft direction of the vehicle, and a pair of left and right upper rails that cover the pair of left and right lower rails from the outside, are slidable in the fore-and-aft direction of the vehicle along the pair of left and right lower rails, and have lifter links attached to the sides, respectively, that enable a seat cushion on which an occupant can be seated to be raised and lowered.

[0008] The seat slide structure according to the first aspect includes a pair of left and right lower rails and a pair of left and right upper rails. The pair of left and right lower rails are fixed to a floor of the vehicle along the vehicle longitudinal direction. Meanwhile, the pair of left and right upper rails cover the pair of left and right lower rails from the outside, respectively, and are slidable along the pair of left and right lower rails in the vehicle longitudinal direction. Furthermore, lifter links are attached to the sides of the pair of left and right upper rails, respectively, to enable a seat cushion on which an occupant can be seated to be raised and lowered.

[0009] As a comparative example, for example, a mounting member (so-called riser) for mounting a lifter link is provided upright on an upper wall portion of the upper rail. In other words, the lifter link is attached to the upper side of the upper rail.

[0010] In recent years, vehicles have been increasingly becoming electric vehicles, and batteries are installed under the floor of the vehicle. This raises the position of the floor in the vehicle height direction. For this reason, vehicle seats need to be thin (low in the vehicle height direction).

[0011] In this embodiment, the upper rail, which slides in the vehicle front-rear direction along the lower rail, is adapted to cover the lower rail from the outside. The lifter link is directly attached to the upper rail. This eliminates the need for the riser, which allows the vehicle seat to be made thinner. Furthermore, by eliminating the need for the riser, the number of parts can be reduced, and by ensuring space for the riser, the vehicle seat can be more freely designed in terms of layout.

[0012] Here, in this embodiment, the lifter link is attached to the side of the upper rail. Therefore, the attachment portion of the lifter link can be provided below the upper wall portion of the upper rail, and further, the vehicle seat can be made thinner. Also, in this embodiment, the lifter link is directly attached to the upper rail. For example, as a comparative example, welding, cutting, and other processing are performed on the upper rail to attach the lifter link. In comparison with this case, in this embodiment, strength is maintained with a simple configuration.

[0013] The seat slide structure of the second aspect is the seat slide structure of the first aspect, wherein the lower rail includes a lower wall portion fixed to the floor portion and extending along the seat fore-and-aft direction, and a pair of inner wall portions erected from both ends of the lower wall portion in the seat width direction and arranged opposite each other, and the upper rail includes an upper wall portion arranged opposite the lower wall portion and extending along the seat fore-and-aft direction, and a pair of outer wall portions each hanging down from both ends of the upper wall portion in the seat width direction and arranged opposite each of the pair of inner wall portions, and the lifter link is attached to the outer wall portion of the pair of outer wall portions that is arranged on the inside in the seat width direction.

[0014] In the seat slide structure according to the second aspect, the lower rail in the seat slide structure according to the first aspect includes a lower wall portion and a pair of inner wall portions. The lower wall portion is fixed to the floor portion and extends along the seat front-rear direction. The pair of inner wall portions are erected from both ends of the lower wall portion in the seat width direction and are disposed opposite each other.

[0015] On the other hand, the upper rail is configured to include an upper wall portion and a pair of outer wall portions. The upper wall portion is disposed opposite the lower wall portion and extends along the seat front-rear direction. The pair of outer wall portions hang down from both ends of the upper wall portion in the seat width direction and are disposed opposite the pair of inner wall portions. Of the pair of outer wall portions, a lifter link is attached to the outer wall portion disposed on the inner side in the seat width direction.

[0016] In this embodiment, the lifter link is attached to the outer wall portion of the pair of outer wall portions of the upper rail that is disposed on the inner side in the seat width direction, so that interference with other components can be suppressed compared to a case in which the lifter link is attached to the outer wall portion disposed on the outer side in the seat width direction. Of course, the lifter link may be provided on the outer side in the seat width direction.

[0017] A seat slide structure according to a third aspect is the seat slide structure according to the first or second aspect, in which the inner wall portion is covered by the outer wall portion in a side view of the seat.

[0018] In the seat slide structure according to the third aspect, the inner wall of the lower rail is covered by the outer wall of the upper rail in a side view of the seat. In this aspect, since the inner wall of the lower rail is covered by the outer wall of the upper rail in a side view of the seat, the inner wall of the lower rail and the outer wall of the upper rail overlap each other, making it possible to set the position of the lifter link attached to the side of the upper rail lower. As a result, in this aspect, it is possible to further reduce the thickness of the vehicle seat.

[0019] The seat slide structure of the fourth aspect is a seat slide structure of any one of the first to third aspects, in which the upper rail is formed with a mounting portion that protrudes outward in the width direction of the upper rail and to which the lifter link is attached.

[0020] In the seat slide structure according to the fourth aspect, the upper rail is provided with a mounting portion to which the lifter link is attached, and the mounting portion is formed so as to protrude outward in the width direction of the upper rail.

[0021] In the first aspect described above, the upper rail is covered by the lower rail from the outside and is slidable relative to the lower rail, and therefore, for example, a ball used as a bearing-type slider is provided between the upper rail and the lower rail.

[0022] Therefore, when a lifter link is attached to the side of the upper rail, an attachment member for attaching the lifter link (e.g., a weld bolt, a weld nut, etc.) may interfere with the ball. For this reason, in this embodiment, the attachment portion of the lifter link is protruded outward in the width direction of the upper rail, thereby making it possible to prevent interference between the attachment member and the ball.

[0023] A seat slide structure according to a fifth aspect is the seat slide structure according to any one of the first to fourth aspects, wherein the attachment portion is provided with a weld bolt.

[0024] In the seat slide structure according to the fifth aspect, a weld bolt is provided as an attachment member to the attachment portion, and a lifter link can be attached via the weld bolt.

[0025] In this way, by providing a weld bolt to the mounting portion, the amount of protrusion between the upper rail and the lower rail can be reduced compared to, for example, a case in which a weld nut is provided to the mounting portion.

[0026] A seat slide structure according to a sixth aspect is the seat slide structure according to any one of the first to fifth aspects, wherein at least the upper rail is formed in a shape that can be subjected to press working.

[0027] In the seat slide structure according to the sixth aspect, at least the upper rail is formed in a shape that can be pressed, and can be formed from a single steel plate. Therefore, in this aspect, it is possible to reduce the number of processing steps compared to, for example, welding multiple members together or cutting and raising the mounting portion of the lifter link. Also, in this aspect, it is possible to improve the strength compared to, for example, welding multiple members together or cutting and raising the mounting portion.

[0028] The seat slide structure of the seventh aspect is a seat slide structure of any one of the first to sixth aspects, wherein the upper rail is set so that the cross-sectional shape cut along the width direction is approximately constant along the longitudinal direction.

[0029] In the seat slide structure according to the seventh aspect, the upper rail is set so that the cross-sectional shape when cut along the width direction is approximately constant along the longitudinal direction, and therefore the upper rail is easy to process.

[0030] The seat slide structure according to an eighth aspect is the seat slide structure according to any one of the first to seventh aspects, wherein the upper rail is formed so as to protrude along the width direction at a portion of its longitudinal direction.

[0031] In the seat slide structure of the eighth aspect, the upper rail is formed so as to protrude along the width direction along part of its longitudinal direction, and therefore the upper rail itself can be formed more compactly compared to a case in which the upper rail is formed so as to protrude along the width direction along the entire longitudinal direction.

[0032] A vehicle seat according to a ninth aspect includes a vehicle seat frame according to any one of the first to eighth aspects, and a seat cushion frame, which serves as the skeleton of the seat cushion, can be raised and lowered via the lifter link.

[0033] In the vehicle seat of the ninth aspect, the seat cushion frame can be raised and lowered via a lifter link, making it possible to enjoy the effects obtained by the seat slide structure of any one of the first to sixth aspects. Effect of the Invention

[0034] As described above, the seat slide structure and the vehicle seat according to the present invention have the excellent effect of being able to be formed compactly in the height direction while maintaining strength with a simple configuration. [Brief description of the drawings]

[0035] [Figure 1] 1 is a perspective view of a slide rail to which a seat slide structure according to an embodiment of the present invention is applied, as viewed from the inside in the seat width direction and obliquely from the front side. [Diagram 2] 1 is a perspective view of an upper rail that constitutes a part of a slide rail to which a seat slide structure according to an embodiment of the present invention is applied, as viewed from the outside in a seat width direction and diagonally forward. FIG. [Diagram 3] 1 is a cross-sectional view of a slide rail to which a seat slide structure according to an embodiment of the present invention is applied, cut along a seat width direction. [Figure 4] FIG. 1A is a perspective view of a vehicle seat showing a comparative example, seen from the side, and FIG. 1B is a cross-sectional view corresponding to FIG. 3, showing a state in which a slide rail to which the seat slide structure according to this embodiment is applied is fixed to a floor portion and a lifter link is attached. [Diagram 5] 5 is a cross-sectional view corresponding to FIG. 3 and showing a modified example of a slide rail to which the seat slide structure according to the present embodiment is applied. [Figure 6]FIG. 4 is a cross-sectional view showing a comparative example and corresponding to FIG. 3. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0036] The seat slide structure according to the embodiment of the present invention will be described below with reference to the drawings. Note that the arrow FR shown as appropriate in the following drawings indicates the forward direction (the direction in which the seated person faces) in the seat fore-and-aft direction of the vehicle seat to which the seat slide structure is applied, the arrow UP indicates the upward direction in the seat vertical direction, and the arrow IN indicates the inward direction in the seat width direction. In the following, when the directions of front-rear, up-down, and inside-outside are simply used for the description, they refer to the front-rear in the seat fore-and-aft direction, the up-down in the seat vertical direction, and the inward-outward in the seat width direction when facing the traveling direction of the vehicle, unless otherwise specified.

[0037] (Seat slide structure) First, the configuration of the seat slide structure according to this embodiment will be described.

[0038] As shown in Fig. 1, the seat slide structure 10 according to this embodiment is provided as a pair of slide rails 12 (left and right) along the vehicle front-rear direction on a vehicle floor 14 (see Fig. 4(B)). The slide rails 12 allow a vehicle seat 16 (see Fig. 4(B)) to slide along the vehicle front-rear direction. Fig. 4(B) is a cross-sectional view of the slide rails 12 cut along the seat width direction, showing a state in which a lifter link 18, which will be described later, is attached.

[0039] As shown in FIG. 3, the slide rail 12 includes (a pair of left and right) lower rails 20 and (a pair of left and right) upper rails 22, and in this embodiment, the lower rails 20 are covered by the upper rails 22 from the outside.

[0040] The lower rail 20 includes a lower wall portion 24 and inner wall portions 26, 28, and is formed by pressing a single steel plate. The lower wall portion 24 extends along the seat front-rear direction and is fixed to the floor portion 14. The inner wall portions 26, 28 stand upright from both ends of the lower wall portion 24 in the seat width direction, and the inner wall portions 26, 28 are disposed opposite to each other.

[0041] The inner walls 26, 28 are provided at their upper ends with folded-back portions 30, 32 that are spaced apart from each other and that are folded back so as to be able to face the inner walls 26, 28, respectively. The upper ends of the folded-back portions 30, 32 are each provided with an inclined portion 34 that inclines in a direction away from each other as it approaches the lower side. The lower ends of the folded-back portions 30, 32 are each provided with an inclined portion 36 that inclines in a direction toward each other as it approaches the lower side. Between the inclined portion 34 and the inclined portion 36, a connecting portion 38 is provided that is formed substantially parallel to the inner walls 26, 28, and the inclined portion 34 and the inclined portion 36 are connected via the connecting portion 38.

[0042] On the other hand, the upper rail 22 includes an upper wall portion 40 and outer wall portions 42, 44, and is formed by pressing a single steel plate. The upper wall portion 40 is disposed opposite the lower wall portion 24 of the lower rail 20, and extends along the seat front-rear direction. The outer wall portions 42, 44 hang down from both ends of the upper wall portion 40 in the seat width direction, and the outer wall portions 42, 44 are disposed opposite to each other. In other words, the outer wall portions 42, 44 are disposed opposite to the folded-back portions 30, 32 and the inner wall portions 26, 28, respectively.

[0043] Further, folded-back portions 46, 48 are provided at the lower ends of the outer wall portions 42, 44 so as to be close to each other and be able to face the inner wall portions 26, 28, respectively. These folded-back portions 46, 48 are disposed between the inner wall portions 26, 28 and the folded-back portions 30, 32 of the lower rail 20, respectively.

[0044] Balls 50, 52 used as bearing-type sliders are provided between the upper rail 22 and the lower rail 20. The ball 50 has a larger diameter than the ball 52, and the upper rail 22 is capable of sliding relative to the lower rail 20 via the balls 50, 52.

[0045] For this reason, R portions 54 are provided at both ends in the seat width direction of the upper wall portion 40 of the upper rail 22 to match the diameter of the ball 50. The ball 50 is disposed so as to be able to roll between the R portions 54 and the inclined portion 34. In addition, R portions 56 are provided at the lower ends of the outer wall portions 42, 44 of the upper rail 22 to match the diameter of the ball 52. The ball 52 is disposed so as to be able to roll between the R portions 56 and the inclined portion 36.

[0046] 4(B), the vehicle seat 16 in this embodiment is provided with a lifter link 18. The lifter link 18 allows the vehicle seat 16 to move up and down (raise and lower) relative to the left and right slide rails 12.

[0047] Although not shown, the lifter link 18 is provided between the slide rail 12 and left and right side frames arranged along the front-rear direction of the seat at both ends in the width direction of the seat in a seat cushion frame that is the skeleton of the seat cushion in the vehicle seat 16. The lifter link 18 includes a front link attached to the front end of the slide rail 12 and a rear link attached to the rear end of the slide rail 12.

[0048] As described above, in this embodiment, since the lifter link 18 is provided, the outer wall portion 44 arranged on the inner side in the seat width direction of the upper rail 22 is provided with a mounting portion 58 for mounting the lifter link 18. As shown in FIG. 1, this mounting portion 58 protrudes outward in the seat width direction further than other portions along the seat front-rear direction. As shown in FIG. 2, a weld bolt (mounting member) 60 is provided on the inner side in the seat width direction of this mounting portion 58. The lifter link 18 is attached to the mounting portion 58 via the weld bolt 60, as shown in FIG. 4B.

[0049] (Action and effect of seat slide structure) Next, the operation and effects of the seat slide structure according to this embodiment will be described.

[0050] As shown in FIG. 4(B), in this embodiment, the slide rail 12 constituting the seat slide structure 10 has a lower rail 20 and an upper rail 22, and the lower rail 20 is fixed to the vehicle floor 14 along the fore-and-aft direction of the vehicle.

[0051] In this way, by fixing the lower rail 20 directly to the floor portion 14, it is possible to make the vehicle seat 16 thinner (lower in the height direction of the vehicle) compared to, for example, a case in which the lower rail 20 is fixed to the floor portion 14 via a bracket (not shown), since the bracket is not interposed.

[0052] In this embodiment, the upper rails 22 cover the lower rails 20 from the outside, and are slidable in the vehicle front-rear direction along the lower rails 20. In this embodiment, the upper rails 22, which slide in the vehicle front-rear direction along the lower rails 20, cover the lower rails 20 from the outside. The lifter link 18 is directly attached to the upper rails 22.

[0053] For example, in a comparative example, a slide rail 100 shown in FIG. 6 has an upper rail 104 provided inside a lower rail 102, and the upper rail 104 is covered from the outside by the lower rail 102 with its upper portion protruding.

[0054] In this comparative example, as shown in Fig. 4(A), a riser 106 is provided on an upper wall portion 104A of an upper rail 104. Fig. 4(A) shows a state in which a vehicle seat 108 is viewed from the side. The riser 106 has a substantially L-shaped cross section when cut along the seat width direction, and a pin of a lifter link is attached to a vertical wall portion 106A constituting a part of the riser 106 (attachment portion 110). The position of this attachment portion 110 is at a height H2 from the floor portion 14 of the vehicle.

[0055] In contrast, in this embodiment, as described above, the lifter link 18 is attached directly to the upper rail 22 shown in Fig. 4(B). The center position of the stud bolt 60 to which the lifter link 18 is attached is at a height H1 from the floor 14 of the vehicle.

[0056] In this manner, in this embodiment, since the lifter link 18 is directly attached to the upper rail 22, the riser 106 shown in Fig. 4(A) is not necessary, and the vehicle seat 16 can be made thinner in the height direction (H1) accordingly. In other words, the height dimension is made thinner by H.

[0057] In addition, in this embodiment, since the riser 106 is not necessary, the number of parts can be reduced, and by securing space for the riser 106, the freedom of layout of the vehicle seat 16 is improved.

[0058] Furthermore, in this embodiment, the lifter link 18 is directly attached to the upper rail 22, so that, for example, although not shown, the strength of the slide rail 12 is maintained with a simple configuration compared to a case in which welding, cutting, or other processing is performed on the upper rail 22 to attach the lifter link 18.

[0059] As described above, in this embodiment, the seat slide structure 10 can be formed compactly in the height direction while maintaining its strength.

[0060] The above-mentioned operation of this embodiment will be further explained below.

[0061] 3, in this embodiment, the lower rail 20 includes a lower wall portion 24 and a pair of inner wall portions 26, 28. The lower wall portion 24 is fixed to the floor portion 14 and extends along the seat front-rear direction. The pair of inner wall portions 26, 28 are erected from both ends of the lower wall portion 24 in the seat width direction and are disposed opposite to each other.

[0062] On the other hand, the upper rail 22 is configured to include an upper wall portion 40 and a pair of outer wall portions 42, 44. The upper wall portion 40 is disposed opposite the lower wall portion 24 and extends along the seat front-rear direction. The pair of outer wall portions 42, 44 hang down from both ends of the upper wall portion 40 in the seat width direction and are disposed opposite the pair of inner wall portions 26, 28. Of the pair of outer wall portions 42, 44, the lifter link 18 is attached to the outer wall portion 44 that is disposed on the inner side in the seat width direction.

[0063] As described above, in this embodiment, the lifter link 18 is directly attached to the outer wall portion 44 of the upper rail 22. That is, in this embodiment, the lifter link 18 can be attached below the upper wall portion 40. Therefore, in this embodiment, the vehicle seat 16 can be made thinner.

[0064] Incidentally, loads in the seat width direction, including those due to a side collision of the vehicle and input from the belt anchor, act on the slide rail 12. In this embodiment, as described above, the inner wall portions 26, 28 of the lower rail 20 are covered by the outer wall portions 42, 44 of the upper rail 22 in a side view of the seat, and the lifter link 18 is directly attached to the outer wall portion 44 of the upper rail 22, so that the entire surface of the slide rail 12 can bear the load in the seat width direction.

[0065] Therefore, compared to a comparative example in which the upper rail 104 is supported by the lower rail 102 with its upper portion protruding as shown in FIG. 6, this embodiment has an advantage in terms of strength of the slide rail 12.

[0066] On the other hand, in this embodiment, the inner wall portions 26, 28 of the lower rail 20 are covered by the outer wall portions 42, 44 of the upper rail 22 in a side view of the seat. As a comparative example, as shown in Fig. 6, an upper rail 104 is provided inside a lower rail 102, and a side wall portion 104B of the upper rail 104 protrudes further than a side wall portion 102BA of the lower rail 102 in a side view of the seat.

[0067] 4(A), the mounting portion 110 of the lifter link is above the upper wall portion 104A of the upper rail 104, and it is difficult to position the center of the pin of the lifter link below the upper wall portion 104A of the upper rail 104. In addition, the height of the slide rail 100 formed by the lower rail 102 and the upper rail 104 is the height of the lower rail 102 plus the height of the protruding portion of the upper rail 104.

[0068] In contrast, in this embodiment, the height of the slide rail 12 is the height of the upper rail 22, and the height of the slide rail 12 can be reduced by the height of the lower rail 20. This makes it possible to reduce the thickness of the vehicle seat 16.

[0069] Thus, in the slide rail 12 shown in Figure 3, the height of the slide rail 12 is approximately the height of the upper rail 22, but in this embodiment, it is not necessarily limited to this as long as the lower rail 20 is covered by the upper rail 22.

[0070] For example, as a modified example of the present invention, a configuration in which a part of a lower rail 62 is exposed from an upper rail 64 may be used as shown in Fig. 5. Such a configuration is included in the present invention. Note that the shape shown in Fig. 5 is used by turning upside down the shape of Fig. 6 shown as a comparative example, and the present invention can be applied by using the current slide rail.

[0071] Furthermore, in this embodiment, a mounting portion 58 to which the lifter link 18 is attached is formed on the upper rail 22 so as to protrude outward in the width direction of the upper rail 22, and the lifter link 18 is attached via the mounting portion 58.

[0072] The mounting portion 58 is provided on the front end side and the rear end side of the upper rail 22. That is, in this embodiment, the mounting portion 58 is formed to protrude along the width direction at a part of the longitudinal direction of the upper rail 22. For this reason, although not shown, in this embodiment, the upper rail 22 itself can be formed compactly compared to a case in which the mounting portion 58 is formed to protrude along the width direction at the entire longitudinal direction of the upper rail 22. However, it goes without saying that the upper rail 22 may be formed so that the cross-sectional shape cut along the width direction is approximately constant along the longitudinal direction.

[0073] In this embodiment, the upper rail 22 is covered from the outside with respect to the lower rail 20 and is slidable with respect to the lower rail 20, and balls 50, 52 are provided between the upper rail 22 and the lower rail 20. Therefore, when the lifter link 18 is attached to the outer wall portion 44 of the upper rail 22, the head of the weld bolt 60 for attaching the lifter link 18 may interfere with the balls 50, 52.

[0074] Therefore, in this embodiment, by making the mounting portion 58 of the lifter link 18 protrude outward in the width direction of the upper rail 22, it is possible to prevent interference between the weld bolt 60 and the balls 50, 52.

[0075] Furthermore, in this embodiment, a weld bolt 60 is provided to the mounting portion 58, and the lifter link 18 can be attached via the weld bolt 60. The amount of protrusion between the upper rail 22 and the lower rail 20 is determined by the thickness of the head of the weld bolt 60, so the amount of protrusion can be made smaller than when a weld nut or other member is used. It goes without saying that a weld nut may be provided to the mounting portion 58.

[0076] In the present embodiment, the upper rail 22 and the lower rail 20 are each formed by pressing a single steel plate. Therefore, in the present embodiment, it is possible to reduce the number of processing steps compared to, for example, welding a plurality of members together or cutting and raising the mounting portion of the lifter link (not shown).

[0077] In addition, compared to a case where a plurality of members are welded together or where a mounting portion is cut and raised, this embodiment can improve the strength of the slide rail 12. However, the upper rail 22 and the lower rail 20 do not necessarily need to be formed by pressing a single steel plate, and may be formed by a plurality of members.

[0078] While one example of the present invention has been described above, the present invention is not limited to the above, and it goes without saying that the present invention can be implemented in various modified forms without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0079] 10. Seat slide structure 12 Slide rail 14 Floor 16 Vehicle seats 18 Lifter link 20 Lower rail 22 Upper Rail 24 Lower wall (lower rail) 26 Inner wall (lower rail) 28 Inner wall (lower rail) 40 Upper wall (upper rail) 42 Exterior wall (upper rail) 44 Exterior wall (side, upper rail) 58 Mounting part 60 Weld Bolt 62 Lower rail 64 Upper Rail

Claims

1. A pair of left and right lower rails fixed to a floor portion of the vehicle along a front-rear direction of the vehicle; a pair of left and right upper rails that cover the pair of left and right lower rails from the outside, are slidable along the pair of left and right lower rails in the vehicle front-rear direction, and have lifter links attached to their side portions to enable a seat cushion on which an occupant can be seated to be raised and lowered; The seat slide structure is provided with:

2. The lower rail is A lower wall portion fixed to the floor portion and extending along a front-rear direction of the seat; A pair of inner wall portions arranged to stand upright from both ends of the lower wall portion in the seat width direction and to face each other; and The upper rail is an upper wall portion disposed opposite the lower wall portion and extending along a front-rear direction of the seat; A pair of outer wall portions each extending downward from both ends of the upper wall portion in the seat width direction and disposed opposite the pair of inner wall portions; The present invention relates to a method for manufacturing a computer-implemented ...

2. The seat slide structure according to claim 1, wherein the lifter link is attached to the outer wall portion disposed on the inner side in the seat width direction, out of the pair of outer wall portions.

3. The seat slide structure according to claim 2 , wherein the inner wall portion is covered by the outer wall portion in a side view of the seat.

4. 2. The seat slide structure according to claim 1, wherein the upper rail is formed with a mounting portion that protrudes outward in a width direction of the upper rail and to which the lifter link is attached.

5. The seat slide structure according to claim 4, wherein the mounting portion is provided with a weld bolt.

6. 2. The seat slide structure according to claim 1, wherein at least the upper rail is formed into a shape that can be pressed.

7. The seat slide structure according to claim 1 , wherein the upper rail is formed so that a cross-sectional shape cut along a width direction thereof is substantially constant along a longitudinal direction.

8. The seat slide structure according to claim 4 , wherein the upper rail is formed so as to protrude in a width direction at a part in a longitudinal direction.

9. A vehicle seat to which the seat slide structure according to any one of claims 1 to 8 is applied, and a seat cushion frame that serves as a skeleton of the seat cushion can be raised and lowered via the lifter link.

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