Vehicle seat

Abstract

To provide a vehicle seat capable of saving space and reducing the weight of installation space of a link mechanism capable of reducing a step between an occupant supporting surface of a seat cushion and the occupant supporting surface of a seat back when the seat back is tilted backward.SOLUTION: A vehicle seat 10 is provided with a link mechanism 20 provided between a rear end part of a seat cushion frame and a lower end part of a seat back frame, wherein the link mechanism 20 has a support plate 40 made of resin for supporting the rear end part of a seat cushion 14 from the lower side, and a wire member 50 having one end part 52 attached to the support plate 40 and the other end 54 attached to a support member 24 of the seat back frame, as a seat back 18 is tilted backward, the one end part 52 of the wire member 50 is pulled backward, thereby moving the rear end part of the support plate 40 upward and raising the rear end part of the seat cushion 14.SELECTED DRAWING: Figure 5

Description

[Technical field]

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

[0002] Vehicle seats that can reduce the difference in height between the occupant support surface of the seat cushion and the occupant support surface of the seat back when the seat back is tilted backward by using a link mechanism provided between the rear end of the seat cushion and the lower end of the seat back have been known for some time (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] US Patent Application Publication No. 2019 / 0143852 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in this vehicle seat, the link mechanism provided between the rear end of the seat cushion and the lower end of the seat back protrudes toward the rear side of the seat cushion (below the seat back), occupying a large installation space, which impairs the appearance and makes it difficult for an occupant sitting in a seat (rear seat) rearward of the vehicle seat to stretch his / her legs into the space behind the seat cushion. In addition, the link mechanism uses many metal parts, which increases the weight and manufacturing costs.

[0005] Therefore, an object of the present invention is to provide a vehicle seat that can reduce the installation space and weight of a link mechanism that can reduce the step between the occupant support surface of the seat cushion and the occupant support surface of the seat back when the seat back is tilted backward. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, a vehicle seat of a first aspect of the present invention comprises a seat cushion frame provided inside a seat cushion, a seat back frame provided inside a seat back and having a seat lower end rotatably attached to a seat rear end of the seat cushion frame, and a link mechanism provided between the seat rear end of the seat cushion frame and the seat lower end of the seat back frame, wherein the link mechanism has a resin support plate that supports the seat rear end of the seat cushion from the underside of the seat, and a wire member having one end attached to the support plate and the other end attached to the seat back frame, and is configured such that as the seat back is tilted backward, the one end of the wire member is pulled toward the seat rear side, so that the seat rear end of the support plate moves toward the upper side of the seat with the seat front end as a pivot point, thereby lifting the seat rear end of the seat cushion.

[0007] According to the first aspect of the invention, when the seat back is tilted backward, one end of the wire member is pulled toward the rear of the seat, so that the rear end of the support plate moves toward the upper side of the seat with the front end of the seat as a pivot point, and the rear end of the seat cushion is raised. Therefore, when the seat back is tilted backward, the step between the occupant support surface of the seat cushion and the occupant support surface of the seat back is reduced. In addition, since the link mechanism is composed of a resin support plate that supports the rear end of the seat cushion from the lower side of the seat, and a wire member having one end attached to the support plate and the other end attached to the seat back frame, the installation space is saved and the weight is reduced.

[0008] Furthermore, a second aspect of the vehicle seat according to the present invention is the vehicle seat of the first aspect, wherein the link mechanism includes a resin base member having a rear end attached to a rod member provided at the rear end of the seat cushion frame with the seat width direction as the axial direction, and a pulley portion provided at the rear end of the base member, and the wire member is configured to be spanned across the base member from the upper side of the seat and across the pulley portion from the lower side of the seat.

[0009] According to the second aspect of the invention, the link mechanism includes a resin base member having a seat rear end attached to a rod member provided at a seat rear end of the seat cushion frame with the seat width direction as the axial direction, and a pulley portion provided at the seat rear end of the base member. The wire member is hung from the base member from above the seat and hung from the pulley portion from below the seat. In other words, the wire member does not extend below the seat.

[0010] Therefore, the weight of the link mechanism can be reduced and the installation space of the link mechanism on the seat rear side of the seat cushion can be further reduced, making it easier for an occupant sitting on a seat rearward of the vehicle seat to stretch their legs into the space on the seat rear side of the seat cushion. In addition, the pulley part can be easily provided, and the wire member is hidden by the base member and is difficult to see from the seat rear side, reducing the risk of spoiling the appearance.

[0011] Furthermore, a third aspect of the vehicle seat according to the present invention is the vehicle seat of the second aspect, wherein the wire member has an excess portion to prevent the one end from being pulled toward the rear of the seat when the seat back is tilted backward less than a predetermined angle.

[0012] According to the third aspect of the invention, the wire member has an excess length for preventing one end of the wire member from being pulled toward the rear of the seat when the seat back is tilted backward less than a predetermined angle, thereby preventing the rear end of the seat cushion from being lifted when the seat back is tilted backward less than a predetermined angle.

[0013] A vehicle seat according to a fourth aspect of the present invention is the vehicle seat according to the third aspect, wherein the base member has an insertion portion into which the wire member is slidably inserted.

[0014] According to the fourth aspect of the invention, the base member has an insertion portion into which the wire member is slidably inserted. In other words, the wire member is inserted with a predetermined friction with respect to the insertion portion. Therefore, even if the wire member has an excess portion, it is difficult for it to come off the insertion portion, and the positional deviation of the wire member in the seat width direction is prevented. As a result, as the seat back is tilted backward, the seat rear end of the support plate is efficiently moved toward the upper side of the seat with the seat front end serving as a pivot point.

[0015] Furthermore, a fifth aspect of the vehicle seat according to the present invention is a vehicle seat according to any one of the second to fourth aspects, wherein the base member has an extension portion that extends toward the front of the seat below the support plate, and a seat front end portion of the support plate is rotatably supported by the extension portion.

[0016] According to the fifth aspect of the invention, the base member has an extension portion that extends further forward than the support plate below the seat, and the front end of the support plate is rotatably supported by the extension portion. Therefore, a link mechanism can be easily installed that moves the rear end of the support plate toward the upper side of the seat with the front end of the seat as a pivot point as the seat back is tilted backward. Effect of the Invention

[0017] As described above, according to the present invention, it is possible to reduce the installation space and weight of a link mechanism that can reduce the step between the occupant support surface of the seat cushion and the occupant support surface of the seat back when the seat back is tilted backward. [Brief description of the drawings]

[0018] [Figure 1] 1 is a schematic perspective view showing an internal structure of a vehicle seat according to an embodiment of the present invention; [Diagram 2] 2 is a schematic perspective view showing the structure of a link mechanism of the vehicle seat according to the embodiment, as viewed from the front side; FIG. [Diagram 3] 2 is a schematic perspective view showing the structure of a link mechanism of the vehicle seat according to the embodiment, as viewed from the rear side. FIG. [Figure 4] 2 is a schematic side view showing a link mechanism of the vehicle seat according to the embodiment before it is tilted backward. FIG. [Diagram 5] 4 is a schematic side view showing a link mechanism after the vehicle seat according to the embodiment is tilted backward. FIG. [Figure 6] 1A is a schematic side view showing an enlarged view of a part of a link mechanism according to a modified example of the present embodiment (wherein the wire member has no extra length), and FIG. 1B is a schematic side view showing an enlarged view of a part of a link mechanism according to a modified example of the present embodiment (wherein the wire member has an extra length). [Figure 7] FIG. 11 is a schematic side view showing a state after the vehicle seat according to the comparative example has been tilted backward. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. For convenience of explanation, the arrow UP shown in each drawing indicates the upward direction of the vehicle seat, the arrow FR indicates the forward direction of the vehicle seat, and the arrow RH indicates the rightward direction of the vehicle seat. In addition, in the following explanation, when the directions of up / down, front / rear, and left / right are described without special mention, they refer to up / down, front / rear, and left / right of the vehicle seat. In addition, the left / right direction is synonymous with the seat width direction.

[0020] 1, the vehicle seat 10 according to this embodiment has a seat cushion frame 12 provided inside a seat cushion 14 (see FIG. 4), and a seat back frame 16 provided inside a seat back 18 (see FIG. 4). In a side view, the seat cushion frame 12 has a pair of left and right side frames 12S that become wider toward the rear, and the seat back frame 16 has a pair of left and right side frames 16S that become wider toward the lower side.

[0021] The lower end (lower end) of each side frame 16S of the seatback frame 16 is attached to the seat width direction inside of the rear end (rear end) of each side frame 12S of the seat cushion frame 12 so as to be rotatable about a rotation shaft 15. As shown in Fig. 4, the seat cushion 14 has an occupant support surface 14A which is an upper surface on which an occupant (not shown) sits (supporting the buttocks and thighs of the occupant), and the seatback 18 has an occupant support surface 18A which is a front surface which supports the back of the occupant (not shown).

[0022] 1 to 3, the vehicle seat 10 includes a link mechanism 20 provided between the rear end of the seat cushion frame 12 and the lower end of the seatback frame 16. The link mechanism 20 has a cylindrical rod member 22 that is axially aligned with the seat width direction and is installed between the rear ends of each side frame 12S of the seat cushion frame 12. The link mechanism 20 has a resin base member 30 to which a locking portion 32 is attached as the rear end of the rod member 22.

[0023] Specifically, the base member 30 has a pair of left and right engaging portions 32 formed in a roughly inverted "U" shape when viewed from the side so as to engage (fit) with the rod member 22 from above, a connecting portion 34 formed in a roughly "L" shape when viewed from the side which integrally connects the front walls 32A of the pair of left and right engaging portions 32, and a pair of left and right extending portions 36 which extend integrally a predetermined length forward from both the left and right ends of the front end portion (front end portion) of the connecting portion 34.

[0024] Each locking portion 32 has a predetermined width in the seat width direction (axial direction of the rod member 22). The connecting portion 34 is provided integrally between the seat width direction inner end of the right locking portion 32R and the seat width direction inner end of the left locking portion 32L, and has a back plate 34A that is generally rectangular in front view and extends downward together with the front wall 32A of each locking portion 32.

[0025] This connecting portion 34 has a width from the outer end of the right-side locking portion 32R in the seat width direction to the outer end of the left-side locking portion 32L in the seat width direction, and has a lower panel 34B (see Figure 3) that is approximately rectangular in plan view and extends forward from the lower ends of the front wall 32A and back panel 34A of each locking portion 32.

[0026] Further, extending portions 36 having a generally rectangular shape in a plan view and a left-right symmetrical shape extend integrally from the left and right ends of the front end portion of the lower plate 34B of the connecting portion 34. In other words, the base member 30 has the lower plate 34B located below a support plate 40 described later, and a pair of left and right extending portions 36 below the support plate 40 and extending forward beyond the support plate 40.

[0027] 1 to 3, linear spring members 28 are embedded with a portion exposed inside the seat width direction outer end of the base member 30 (each locking portion 32, the lower panel 34B, and the extending portion 36). The spring members 28 protrude forward from the front ends of the pair of right and left extending portions 36, and the front end of the spring members 28 protruding forward is connected to the rear end of a connecting portion 12A that extends in the seat width direction and integrally connects the front ends of each side frame 12S of the seat cushion frame 12.

[0028] The link mechanism 20 also has a resin support plate 40 that supports the rear end of the seat cushion 14 from below. The support plate 40 is formed in a generally rectangular shape in a plan view with its longitudinal direction being the seat width direction, and its longitudinal length is the same as or slightly shorter than the width of the seat cushion 14. A cylindrical portion 42 with its axial direction aligned with the seat width direction is integrally formed at the rear end of the support plate 40, and cylindrical portions 44 with their axial direction aligned in the front-rear direction are also integrally formed at both left and right ends of the support plate 40.

[0029] A shaft 46 bent in a generally U-shape in plan view with the front side open is inserted continuously through the cylindrical portion 42 and each cylindrical portion 44 of the support plate 40, and left and right front end portions 46A of the shaft 46 protruding forward from each cylindrical portion 44 are each bent at a generally right angle toward the inside in the seat width direction. Each front end portion 46A of the shaft 46 is supported by the outer end portion in the seat width direction on the upper surface of each extension portion 36 so as to be rotatable with the seat width direction as its axial direction.

[0030] That is, a claw portion 37 having a recess 37A that is substantially U-shaped in side view and has an open front side is protruded from the outer end in the sheet width direction on the upper surface of each extension portion 36, and each front end 46A of the shaft 46 is rotatably engaged from the front side to the recess 37A of each claw portion 37. As a result, the support plate 40 is configured such that its rear end side can move up and down (can be raised and lowered) with its front end side (each front end 46A of the shaft 46 engaged with the recess 37A of each claw portion 37) as the rotation center (rotation fulcrum).

[0031] The link mechanism 20 has a pair of left and right wire members 50, one end 52 (see FIG. 4) of which is attached to the rear end of the support plate 40 and the other end 54 (see FIG. 4) of which is attached to the lower end of the seat back frame 16. Each wire member 50 has a predetermined rigidity and is structured to be difficult to break.

[0032] Also, as shown in FIG. 4, the rear portion of the support plate 40 is bent to conform to the curved shape of the connecting portion 34 in the base member 30, and the cylindrical portion 42 of the support plate 40 faces the lower side of the front wall 32A of each engagement portion 32 and the lower side of the back plate 34A of the connecting portion 34 in the front-to-rear direction.

[0033] 3 and 4, a pair of left and right roll sections 48, whose axial direction is the sheet width direction, are integrally provided at a predetermined interval in the left and right direction above the bent portion of the support plate 40. Each roll section 48 is rotatably supported between a pair of support plates integrally formed with the support plate 40 and facing diagonally downward and rearward in a side view.

[0034] A pair of substantially rectangular through holes 34C are formed at the bent portion of the connecting portion 34 at a predetermined interval in the left-right direction, and each roll portion 48 is exposed from each through hole 34C. One end portion 52 of each wire member 50 is wound around and attached to each roll portion 48.

[0035] The link mechanism 20 also has a pair of left and right pulley sections 38 with their axial direction aligned with the seat width direction, which are integral with the rear end of the base member 30. That is, each pulley section 38 is formed in a circular shape in side view, and is rotatably supported between a pair of support plates integrally formed toward the rear side in side view on the rear wall 32B of each locking section 32. As shown in Fig. 2, an insertion section 33 into which each wire member 50 is slidably inserted is integrally provided on the top of each locking section 32 and protrudes therefrom.

[0036] Each insertion section 33 has a groove 33A formed in a wave shape in a plan view, and each wire member 50 is inserted along each groove 33A. That is, each wire member 50 is inserted into the groove 33A of the insertion section 33 with a predetermined friction. This makes it difficult for each wire member 50 to come off the groove 33A of the insertion section 33, even if it has an excess length portion 56 described later.

[0037] A support member 24, whose longitudinal direction is the seat width direction, is installed on the lower end of the side frame 16S of the seatback frame 16. As shown in Fig. 4, the support member 24 is formed in a substantially C-shaped cross section with a front end 24A and a rear end 24B bent upward in a side view.

[0038] 2 to 4, a pair of left and right roll sections 26, whose axial direction is the sheet width direction, are integrally provided at a predetermined interval in the left and right direction on the lower surface of the support member 24. Each roll section 26 is rotatably supported between a pair of support plates integrally formed with the support member 24 facing downward in a side view.

[0039] Therefore, each wire member 50, with each one end 52 attached to each roll portion 48, is configured to be hung from above across each locking portion 32 and inserted into the groove portion 33A of each insertion portion 33, and hung from below across each pulley portion 38. The other end portion 54 of each wire member 50, hung from below across each pulley portion 38 and extending upward, is configured to be wound around and attached to each roll portion 26 such that an excess length portion 56, which will be described later, is formed between each pulley portion 38 and each roll portion 26.

[0040] 4, a slack portion 56 that is slackened to a predetermined length is formed in each wire member 50. This slack portion 56 is for preventing one end 52 of each wire member 50 from being pulled rearward (specifically, diagonally upward toward the rear) when the seat back 18 is tilted backward less than a predetermined angle.

[0041] In other words, as shown in Figure 5, the length of this excess portion 56 is set by adjusting the amount of winding around each roll portion 26 or each roll portion 48 so that a predetermined tension is applied to each wire member 50 (so that the other end 54 of each wire member 50 is pulled upward) only when the seat back 18 is tilted backward by a predetermined angle or more.

[0042] The link mechanism 20 of this embodiment is configured as described above, and as the seat back 18 is tilted backward by a predetermined angle or more, the other end 54 of each wire member 50 is pulled upward, and one end 52 of each wire member 50 is pulled rearward (more specifically, diagonally upward and rearward) via each pulley section 38 and each locking section 32, causing the rear end side of the support plate 40 to move upward with its front end side as a pivot point, thereby raising the rear end of the seat cushion 14 to a predetermined height (see Figure 5).

[0043] Next, the operation of the vehicle seat 10 according to this embodiment configured as above will be described.

[0044] First, a vehicle seat 100 according to a comparative example shown in Fig. 7 will be described. This vehicle seat 100 is not provided with a link mechanism 20. Therefore, when the seat back 118 of this vehicle seat 100 is tilted backward by a predetermined angle or more, a step T along the vertical direction is generated between the occupant support surface 114A of the seat cushion 114 and the occupant support surface 118A of the seat back 118. This step T may cause pain in the lower back of an occupant (not shown).

[0045] In contrast, the vehicle seat 10 according to this embodiment is provided with a link mechanism 20 as shown in Figures 1 to 4. Therefore, as shown in Figure 5, it is possible to reduce the step in the vertical direction occurring between the occupant support surface 14A of the seat cushion 14 and the occupant support surface 18A of the seat back 18 (the occupant support surface 14A of the seat cushion 14 and the occupant support surface 18A of the seat back 18 can be arranged almost flat).

[0046] 5, when the seat back 18 is tilted backward by a predetermined angle or more, the other end 54 of each wire member 50 is pulled upward. Since each wire member 50 is hung between each pulley portion 38 and each locking portion 32, one end 52 of each wire member 50 is pulled rearward (specifically, diagonally upward toward the rear).

[0047] As a result, the rear end of the support plate 40 moves upward around the front ends 46A of the shafts 46 rotatably supported on the upper surfaces of the extensions 36 as the rotation center (rotation fulcrum), and the rear end of the seat cushion 14 is raised to a predetermined height. Therefore, the step in the vertical direction between the occupant support surface 14A of the seat cushion 14 and the occupant support surface 18A of the seat back 18 is reduced, and the possibility of the occupant (not shown) injuring his / her lower back can be reduced. In other words, the relaxation of the occupant (not shown) can be improved.

[0048] Here, the link mechanism 20 according to this embodiment is composed of a resin support plate 40 that supports the rear end of the seat cushion 14 from below, and a pair of left and right wire members 50, one end 52 of which is attached to the support plate 40 and the other end 54 of which is attached to the support member 24. Therefore, compared to a link mechanism (not shown) that uses a lot of metal parts, the installation space of the link mechanism 20 can be saved and the weight can be reduced, and an increase in the manufacturing cost can also be suppressed.

[0049] The link mechanism 20 also includes a resin base member 30 having locking portions 32 attached to a rod member 22 provided at the rear end of the seat cushion frame 12 with the seat width direction as the axial direction, and pulley portions 38 provided on the rear walls 32B of the locking portions 32 of the base member 30. Therefore, each wire member 50 is hung from above across each locking portion 32 of the base member 30, and is hung from below across each pulley portion 38. In other words, each wire member 50 does not extend downward.

[0050] This allows the link mechanism 20 to be lighter and the installation space for the link mechanism 20 on the rear side of the seat cushion 14 (below the seat back 18) to be further reduced, making it easier for an occupant sitting on a seat (not shown) rearward of the vehicle seat 10 to stretch their legs into the space behind the seat cushion 14. Also, it becomes easier to provide the pulley parts 38, and since the wire members 50 are hidden by the locking parts 32 of the base member 30 and are difficult to see from the rear side, the risk of the appearance being marred can be reduced.

[0051] Furthermore, each wire member 50 has an excess length 56 for preventing one end 52 of each wire member 50 from being pulled rearward (specifically, diagonally upward toward the rear) when the seat back 18 is tilted backward less than a predetermined angle. Therefore, it is possible to prevent the rear end of the seat cushion 14 from being lifted when the seat back 18 is tilted backward less than a predetermined angle.

[0052] Further, each locking portion 32 of the base member 30 has an insertion portion 33 into which each wire member 50 is slidably inserted. That is, each wire member 50 is inserted with a predetermined friction into the groove portion 33A of each insertion portion 33. Therefore, even if each wire member 50 has an excess portion 56, it is difficult for it to come off from the groove portion 33A of each insertion portion 33, compared to a case where each wire member 50 is inserted into each insertion portion (not shown) having a straight groove portion along the front-rear direction in a plan view.

[0053] This prevents the wire members 50 suspended across each locking portion 32 from shifting in the seat width direction, so that when the seat back 18 is tilted backward by a predetermined angle or more, the rear end of the support plate 40 can efficiently move upward with each front end 46A of the shaft 46 as the center of rotation (rotation fulcrum).

[0054] Further, the base member 30 has a pair of left and right extending portions 36 extending forward from the support plate 40 below the support plate 40, and each front end 46A of a shaft 46 provided on the support plate 40 is rotatably supported by each extending portion 36. Therefore, it is possible to easily install a link mechanism 20 that moves the rear end of the support plate 40 upward around each front end 46A of the shaft 46 as a rotation center (rotation fulcrum) when the seat back 18 is tilted backward by a predetermined angle or more.

[0055] When the seat back 18 is returned to a rearward tilt less than the predetermined angle, tension is no longer applied to the wire members 50, and the weight of the occupant (not shown) presses the rear end of the occupant support surface 14A of the seat cushion 14 downward. This causes the rear end of the support plate 40 to move downward around the front ends 46A of the shafts 46 as the rotation center (rotation fulcrum), so that the rear end of the seat cushion 14 can be lowered to its original height position.

[0056] The function of the vehicle seat 10 according to this embodiment is as described above. However, for example, as shown in FIG. 6, even if the seat back 18 is tilted backward less than a predetermined angle, one end 52 of the wire member 50 is pulled rearward, causing the rear end of the support plate 40 to move upward with each front end 46A of the shaft 46 as the center of rotation (rotation fulcrum), thereby lifting the rear end of the seat cushion 14.

[0057] That is, as shown in Figures 6(A) and 6(B), the pulley portion 38 over which the wire member 50 is hung may be formed into a cam shape that is approximately triangular in side view, and the cam-shaped pulley portion 38 may be configured to selectively take on a position in which it is rotated forward (counterclockwise as shown) or backward (clockwise as shown) with one vertex as the center of rotation by operating a switch by an occupant seated in the vehicle seat 10.

[0058] 6(B), when the pulley unit 38 is rotated forward, the wire member 50 is configured to be hung only at one vertex portion that is the rotation center of the pulley unit 38, and the same surplus portion 56 as above is formed in the wire member 50. In other words, in this case, the configuration is the same as in the above embodiment.

[0059] 6(A), when the pulley portion 38 is rotated rearward, the wire member 50 is configured to be hung not only around the apex portion that is the rotation center of the pulley portion 38 but also around the apex portion on the rear side, so that the wire member 50 does not have an excess portion 56. Therefore, in this case, when the seat back 18 starts to tilt rearward, the wire member 50 is pulled rearward at the same time, and the rear end portion of the seat cushion 14 starts to rise, but this configuration may be adopted.

[0060] Although the vehicle seat 10 according to the present embodiment has been described above with reference to the drawings, the vehicle seat 10 according to the present embodiment is not limited to the illustrated one, and can be appropriately modified in design without departing from the scope of the present invention. For example, in the embodiment shown in Fig. 4, the wire member 50 may not be provided with the extra length portion 56, and the wire member 50 may be pulled rearward at the same time that the seat back 18 starts to tilt backward, causing the rear end of the seat cushion 14 to start to rise.

[0061] Further, each locking portion 32 is not limited to a configuration in which it is attached by being locked (fitted) to the rod member 22 from above, that is, a configuration in which it is attached so as not to cover the lower side of the outer circumferential surface of the rod member 22 in a side view. Each locking portion 32 may be configured to be attached so as to cover the entire outer circumferential surface of the rod member 22, for example.

[0062] Furthermore, one end 52 of each wire member 50 is not limited to a configuration in which it is attached to the rear end on the underside of the support plate 40, and may be attached, for example, to approximately the center in the front-rear direction on the underside of the support plate 40 in a side view, as long as the rear end of the support plate 40 can be raised. Similarly, the other end 54 of each wire member 50 is not limited to a configuration in which it is attached to the underside of the support member 24, and may be attached, for example, to the upper surface of the support member 24.

[0063] However, if one end 52 of each wire member 50 is attached to the rear end on the underside of the support plate 40 and the other end 54 of each wire member 50 is attached to the underside of the support member 24, the length of each wire member 50 can be reduced to the minimum necessary, which is preferable from the standpoint of reducing manufacturing costs. [Explanation of symbols]

[0064] 10 Vehicle seats 12 Seat cushion frame 14 Seat cushion 16 Seat back frame 18 Seat back 20 Link mechanism 22 Rod member 30 Base material 33 Insertion section 36 Extension 38 Pulley part 40 Support Plate 50 Wire material 52 One end 54 Other end 56 Extra length

Claims

1. A seat cushion frame provided inside the seat cushion; a seat back frame provided inside the seat back, the seat back frame having a seat lower side end rotatably attached to a seat rear side end of the seat cushion frame; a link mechanism provided between a rear end of the seat cushion frame and a lower end of the seat back frame; Equipped with The link mechanism includes: a resin support plate that supports a rear end portion of the seat cushion from below the seat; a wire member having one end attached to the support plate and the other end attached to the seat back frame; having A vehicle seat configured such that as the seat back is tilted backward, one end of the wire member is pulled toward the rear of the seat, causing the rear end of the support plate to move toward the upper side of the seat with the front end of the seat as a pivot point, thereby lifting the rear end of the seat cushion.

2. The link mechanism includes: a seat cushion frame having a seat rear end portion and a seat back end portion, the seat cushion frame being provided with a seat back end portion and a seat back end portion, the seat cushion frame being provided with a seat back end portion and a seat back end portion, the seat back end portion and a seat back end portion, A pulley portion provided at the seat rear end portion of the base member; having 2. The vehicle seat according to claim 1, wherein the wire member is configured to be hung across the base member from an upper side of the seat and across the pulley portion from a lower side of the seat.

3. 3. The vehicle seat according to claim 2, wherein the wire member has an extra length for preventing the one end from being pulled toward the rear of the seat when the seat back is tilted backward less than a predetermined angle.

4. The vehicle seat according to claim 3 , wherein the base member has an insertion portion into which the wire member is slidably inserted.

5. The vehicle seat according to any one of claims 2 to 4, wherein the base member has an extension portion that extends toward the front of the seat below the support plate, and a seat front end portion of the support plate is rotatably supported by the extension portion.

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