Seat cushions for vehicle seats

Abstract

To provide a seat cushion of a vehicle seat capable of easily improving sitting comfort of a seated occupant and easily suppressing vibration of the occupant when a vehicle is vibrated.SOLUTION: The seat cushion of a vehicle seat includes: a cushion frame; a plurality of cushion springs 35A, 35B, 35C which is supported by the cushion frame and arranged side by side in a seat left-right direction, and which has slide support portions 40A, 40B, 40C extending in the seat front-rear direction in a plan view and has fixing portions 37A, 37B, 37C having front-rear positions different from those of the slide support portions; and an elastically deformable resin plate 45 which is disposed to face all the cushion springs from above and which has fixed portions 49 fixed to the fixing portions and supported portions 57 relatively slidably supported by the slide support portions.SELECTED DRAWING: Figure 6

Description

Technical Field

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

Background Art

[0002] The seat cushion of a vehicle seat disclosed in Patent Document 1 below includes a cushion frame, a support member that is a resin plate-like member, and a plurality of metal wires. The cushion frame has left and right side members, a front cross member that connects the front portions of the left and right side members in the left-right direction of the seat, and a rear cross member that connects the rear portions of the left and right side members in the left-right direction of the seat. The support member and the wire are fixed to each other. The front portion of the support member is supported by the front cross member, and the rear portion of the wire is supported by the rear cross member. The planar shape of the support member is large. Therefore, the support member is likely to converge the vibration of the occupant sitting on the seat cushion when the vehicle vibrates.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The support member and the wire of the seat cushion of Patent Document 1 above are fixed to each other. Therefore, when an occupant sits on the seat cushion, the occupant is likely to receive a large reaction force from the support member. That is, the sitting comfort of the occupant when sitting on the seat cushion is not good.

[0005] In consideration of the above facts, an object of the present invention is to obtain a seat cushion for a vehicle seat that can easily improve the sitting comfort of a seated occupant and can easily converge the vibration of the occupant when the vehicle vibrates.

Means for Solving the Problems

[0006] The seat cushion for a vehicle seat according to claim 1 comprises a cushion frame, a plurality of cushion springs supported by the cushion frame and having a slide support portion that extends linearly in the front-rear direction of the seat in a plan view and a fixed portion that is positioned at a front-rear position different from the slide support portion, and arranged in the left-right direction of the seat, and a resin plate that is positioned opposite to all of the cushion springs from above and has a fixed portion that is fixed to the fixed portion and a supported portion that is slidably supported relative to the slide support portion, and is elastically deformable.

[0007] The seat cushion described in claim 1 has a resin plate that is supported by a plurality of cushion springs arranged in the left-right direction of the seat and supported by a cushion frame, and is elastically deformable. Therefore, when an occupant sits on the seat cushion, the resin plate with a large planar shape supports the occupant's body. As a result, the seat cushion described in claim 1 is more effective at dampening the vibrations of the occupant when the vehicle vibrates.

[0008] Furthermore, when an occupant applies load to the seat cushion, the cushion spring flexes, and the sliding support part slides relative to the supported part of the resin plate. Therefore, the seat cushion described in claim 1 is more likely to provide a better seating comfort for the occupant compared to a case where the cushion spring does not slide relative to the resin plate.

[0009] The seat cushion for a vehicle seat according to claim 2 is configured such that the cushion spring and the resin plate are separate components, in the configuration described in claim 1.

[0010] The seat cushion for a vehicle seat described in claim 2 can be manufactured more easily than when the cushion spring and resin plate are integrally molded.

[0011] The seat cushion for a vehicle seat according to claim 3, in the configuration according to claim 2, wherein the fixing portion has left and right extensions extending in the left-right direction of the seat in a plan view and front and rear extensions connected to the left and right extensions and extending in the front-rear direction of the seat in a plan view, and the fixed portion is a groove formed on the lower surface of the resin plate, having left and right grooves that extend in the left-right direction of the seat in a plan view and are fitted into the left and right extensions from above, and front and rear grooves that extend in the front-rear direction of the seat in a plan view and are fitted into the front and rear extensions from above.

[0012] According to the seat cushion for a vehicle seat described in claim 3, a fixing structure for securing the cushion spring and resin plate, which are configured as separate components, can be realized with a simple configuration.

[0013] The seat cushion for a vehicle seat according to claim 4, in the configuration according to claim 2 or claim 3, wherein the resin plate comprises a plate-shaped main body portion that faces all of the cushion springs in the vertical direction of the seat, and a supported portion that protrudes downward from the lower surface of the main body portion, the fixing portion is located on one side forward and rearward of the slide support portion, and the cushion spring is provided with a stopper portion that can contact one end of the supported portion when the slide support portion slides relative to the supported portion on the other side forward and rearward.

[0014] According to the seat cushion for a vehicle seat described in claim 4, it is possible to prevent the downward deflection of the cushion spring from becoming excessive when an occupant sits on the seat cushion or when vibrations occur in the vehicle.

[0015] The seat cushion for a vehicle seat according to claim 5 comprises three or more cushion springs in the configuration according to claim 4, and when the initial distance is defined as the distance in the front-rear direction from one end of the stopper portion when no occupant is seated on the seat cushion, the initial distance of the cushion spring located in the center in the left-right direction is longer than the initial distance of the remaining cushion springs.

[0016] According to the seat cushion of the vehicle seat described in claim 5, when an occupant sits on the seat cushion or vibrations occur in the vehicle, the central cushion spring, which is more likely to be subjected to a greater force compared to the side cushion springs, can be deflected more than the side cushion springs.

Effect of the Invention

[0017] As described above, the seat cushion of the vehicle seat of the present invention has an excellent effect of being likely to improve the sitting comfort of the seated occupant and being likely to converge the vibrations of the occupant when the vehicle vibrates.

Brief Description of the Drawings

[0018] [Figure 1] It is a schematic side view of a vehicle seat according to an embodiment of the present invention. [Figure 2] It is an exploded perspective view of the constituent members of the seat cushion. [Figure 3] It is a perspective view of the assembled state of the cushion spring and the resin plate. [Figure 4] It is a cross-sectional view taken along the arrow 4-4 of FIG. 3. [Figure 5] It is a bottom view of the assembled state of the cushion spring and the resin plate. [Figure 6] It is a schematic side view of the vehicle seat when an occupant is seated. [Figure 7] It is a bottom view similar to FIG. 5 when an occupant is seated. [Figure 8] It is a perspective view of the cushion spring and the collar of a modification. [Figure 9] It is a bottom view showing a part of the resin plate and the cushion spring of another modification.

Mode for Carrying Out the Invention

[0019] Hereinafter, the vehicle seat 20 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7. In each figure, the arrows FR, LH, and UP appropriately shown indicate the front, left, and upper directions of the vehicle seat 20, respectively. Hereinafter, when simply explaining using the front-back, left-right, and up-down directions, it shall indicate the direction based on the vehicle seat 20.

[0020] As shown in FIG. 1, the vehicle seat 20 is provided on a vehicle body floor 11 which is a part of the vehicle body of the vehicle 10. The vehicle seat 20 includes a lower rail 21, an upper rail 22, a lifter mechanism 23, a seat cushion 25, a seat back 70, and a headrest 75.

[0021] As shown in FIGS. 1 and 2, the seat cushion 25 includes a cushion frame 27 that constitutes the skeleton of the seat cushion 25, cushion springs 35A, 35B, 35C, a resin plate 45, a cushion pad 63, and a cover member 65.

[0022] As shown in FIG. 2, the metal cushion frame 27 includes a pair of left and right side frames 29 arranged apart in the left-right direction, a front panel 31 extending in the left-right direction that connects the front portions of the left and right side frames 29, and a rear pipe 33 extending in the left-right direction that connects the rear portions of the left and right side frames 29. The left and right side frames 29 and the left and right slide rails 24 are connected by the lifter mechanism 23. Three mounting holes 31a are provided at three locations on the upper surface of the front panel 31.

[0023] As shown in FIGS. 2 to 5, the vehicle seat 20 has three cushion springs 35A, 35B, 35C. The cushion springs 35A, 35B, 35C have the same shape as each other.

[0024] The cushion springs 35A, 35B, and 35C, which are arranged side by side in the left-right direction, are manufactured by bending wire made of metal spring material. The cushion springs 35A, 35B, and 35C each include hook portions 36A, 36B, and 36C, fixing portions 37A, 37B, and 37C, intermediate bending portions 38A, 38B, and 38C, stopper portions 39A, 39B, and 39C, slide support portions 40A, 40B, and 40C, and insertion portions 41A, 41B, and 41C.

[0025] The hook portions 36A, 36B, and 36C that constitute the rear ends of the cushion springs 35A, 35B, and 35C are substantially arc-shaped. The planar shape of the fixing portions 37A, 37B, and 37C connected to the front ends of the hook portions 36A, 36B, and 36C is substantially L-shaped. The fixing portions 37A, 37B, and 37C have front and rear extension portions 37A1, 37B1, and 37C1 that extend in the front-rear direction in a plan view and are connected to the front ends of the hook portions 36A, 36B, and 36C, and left and right extension portions 37A2, 37B2, and 37C2 that extend in the left-right direction in a plan view from the front ends of the front and rear extension portions 37A1, 37B1, and 37C1. The left-right dimensions of the intermediate bent sections 38A, 38B, and 38C, connected to the ends of the left-right extensions 37A2, 37B2, and 37C2, are larger than those of the hook sections 36A, 36B, and 36C and the fixing sections 37A, 37B, and 37C. The stopper sections 39A, 39B, and 39C, connected to the front ends of the intermediate bent sections 38A, 38B, and 38C, are parallel to the left-right direction. Here, the part including the left-right extensions 37A2, 37B2, and 37C2, the intermediate bent sections 38A, 38B, and 38C, and the stopper sections 39A, 39B, and 39C is defined as the "bent section." This "bent section" is the part provided in the middle of each cushion spring 35A, 35B, and 35C in the front-rear direction, and includes the part that extends in a direction that intersects the front-rear direction in a plan view. The "intersecting direction" includes the left-right direction, as well as the direction inclined with respect to the front-rear and left-right directions. The slide support sections 40A, 40B, and 40C extend linearly forward from the ends of the stopper sections 39A, 39B, and 39C. The insertion sections 41A, 41B, and 41C extend downward from the front ends of the slide support sections 40A, 40B, and 40C. As shown in Figure 1, when the cushion springs 35A, 35B, and 35C are in a free state, in a side view the fixing sections 37A, 37B, and 37C, the intermediate bending sections 38A, 38B, and 38C, the stopper sections 39A, 39B, and 39C, and the slide support sections 40A, 40B, and 40C are substantially on the same line, and in a plan view the hook sections 36A, 36B, and 36C, the fixing sections 37A, 37B, and 37C, the slide support sections 40A, 40B, and 40C, and the insertion sections 41A, 41B, and 41C are substantially on the same line.However, when the cushion springs 35A, 35B, and 35C are in a free state, the fixing parts 37A, 37B, and 37C, the intermediate bending parts 38A, 38B, and 38C, the stopper parts 39A, 39B, and 39C, and the slide support parts 40A, 40B, and 40C do not have to be on the same straight line when viewed from the side. Also, when the cushion springs 35A, 35B, and 35C are in a free state, the hook parts 36A, 36B, and 36C, the fixing parts 37A, 37B, and 37C, the slide support parts 40A, 40B, and 40C, and the insertion parts 41A, 41B, and 41C do not have to be on the same straight line when viewed from above.

[0026] The cushion springs 35A, 35B, and 35C are stretched between the front panel 31 and the rear pipe 33. Specifically, the hook portions 36A, 36B, and 36C of the cushion springs 35A, 35B, and 35C are placed over the rear pipe 33 from above, and the insertion portions 41A, 41B, and 41C are inserted into the respective mounting holes 31a of the front panel 31 from above.

[0027] The single, integrally molded resin plate 45 comprises a main body portion 47 which is a plate-shaped part with a roughly rectangular shape in plan view, three fixed portions 49 provided at the rear end of the main body portion 47, and three supported portions 57 provided at the front end of the main body portion 47. The resin plate 45 can be manufactured from, for example, PP (polypropylene). That is, the resin plate 45 is manufactured separately from the cushion springs 35A, 35B, and 35C. The resin plate 45 is elastic. As shown in Figure 5, a mounting groove 51 with a roughly L-shape in plan view is formed on the lower surface of each fixed portion 49. The mounting groove 51 has left and right grooves 53 that extend in the left-right direction in plan view, and front and rear grooves 55 that extend in the front-rear direction in plan view. The front end of the front and rear groove 55 is connected to the left end of the left and right grooves 53. Furthermore, the right end of the left and right grooves 53 and the rear end of the front and rear grooves 55 are open. As shown in Figures 2, 3, and 5, the rear of the fixed portion 49 protrudes rearward from the rear end surface of the main body portion 47, and the lower part of the fixed portion 49 protrudes downward from the lower surface of the main body portion 47. As shown in Figure 4, a retaining projection 51a is provided on the ceiling of the inner surface of the mounting groove 51, and retaining claws 51b are provided at the lower ends of both sides of the mounting groove 51.

[0028] As shown in Figure 5, a slide groove 59 extending in the front-rear direction in a plan view is formed on the lower surface of each supported portion 57. Both the front and rear ends of the slide groove 59 are open. As shown in Figures 2, 3, and 5, the front part of the supported portion 57 protrudes forward from the front end surface of the main body portion 47, and the lower part of the supported portion 57 protrudes downward from the lower surface of the main body portion 47. As shown in Figure 4, a retaining projection 59a is provided on the ceiling of the inner surface of the slide groove 59, and retaining claws 59b are provided at the lower ends of both sides of the slide groove 59. Furthermore, in a plan view, the front and rear grooves 55 and the slide groove 59 are located on a straight line extending in the front-rear direction. Furthermore, the position of the rear end surface of the supported portion 57 located in the middle in the left-right direction is slightly forward of the position of the rear end surfaces of the supported portions 57 on both the left and right sides.

[0029] The resin plate 45 is attached to each cushion spring 35A, 35B, and 35C from above. That is, as shown in Figure 5, the fixing parts 37A, 37B, and 37C of each cushion spring 35A, 35B, and 35C are fitted into the mounting groove 51 while elastically deforming the retaining claws 51b of the corresponding fixed part 49, and the sliding support parts 40A, 40B, and 40C of each cushion spring 35A, 35B, and 35C are fitted into the sliding groove 59 while elastically deforming the retaining claws 59b of the corresponding supported part 57. More specifically, the front and rear extensions 37A1, 37B1, and 37C1 are fitted into the corresponding front and rear grooves 55, and the left and right extensions 37A2, 37B2, and 37C2 are fitted into the corresponding left and right grooves 53. Therefore, the relative movement of the fixed part 49 with respect to the cushion springs 35A, 35B, and 35C in the front-rear direction is restricted by the left-right extensions 37A2, 37B2, 37C2 and the left-right grooves 53, and the relative movement of the fixed part 49 with respect to the cushion springs 35A, 35B, and 35C in the left-right direction is restricted by the front-rear extensions 37A1, 37B1, 37C1 and the front-rear grooves 55. Furthermore, the retaining projection 51a and the retaining claw 51b contact the outer circumferential surface of the fixed parts 37A, 37B, and 37C, preventing rattling of the fixed part 49 with respect to the fixed parts 37A, 37B, and 37C. Furthermore, the retaining projection 59a and the retaining claw 59b contact the outer circumferential surface of the slide support parts 40A, 40B, and 40C, preventing rattling of the supported part 57 with respect to the slide support parts 40A, 40B, and 40C in the left-right and up-down directions. As shown in Figure 5, when the resin plate 45 is attached to the cushion springs 35A, 35B, and 35C, the left end of the main body 47 is located to the left of the left end of the intermediate bend 38A, and the right end of the main body 47 is located to the right of the right end of the intermediate bend 38A.

[0030] As shown in Figure 1, the cushion pad 63 is fixed to the upper surface of the resin plate 45 and the upper surface of the cushion frame 27. Furthermore, the surfaces of the cushion frame 27 and the cushion pad 63 are covered by a cover member 65 made of a flexible material.

[0031] As shown in Figure 1, the lower end of the seat back 70 is connected to the rear end of the seat cushion 25. Furthermore, a headrest 75 is provided at the upper end of the seat back 70. This completes the vehicle seat 20.

[0032] Next, the operation and effects of this embodiment will be described.

[0033] Figure 1 shows the vehicle seat 20 when the occupant PS (see Figure 6) is not seated. At this time, the cushion springs 35A, 35B, 35C and the resin plate 45 are in a substantially free state. At this time, the main body portion 47 of the resin plate 45 is substantially flat. At this time, the cushion springs 35A, 35B, 35C and the resin plate 45 are in the positional relationship shown in Figures 3 and 5. That is, the longitudinal distance between the front ends of the stopper portions 39A, 39B, 39C and the corresponding rear end surfaces of the supported portions 57 are initial distances LA1, LB1, and LC1, respectively. As described above, the position of the rear end surface of the supported portion 57 located in the middle in the left-right direction is slightly forward of the position of the rear end surfaces of the supported portions 57 on both the left and right sides. Therefore, when the cushion springs 35A, 35B, 35C and the resin plate 45 are in a substantially free state, the initial distance LB1 > initial distances LA1, LC1.

[0034] Figure 6 shows the vehicle seat 20 when an occupant PS is seated. At this time, a downward load is applied to the upper surface of the cover member 65 from the occupant PS's buttocks PS1 and thighs PS2. As a result, the resin plate 45 and cushion springs 35A, 35B, and 35C elastically deform (bend) in a convex downward manner. Furthermore, the slide support parts 40A, 40B, and 40C corresponding to each supported part 57 (slide groove 59) of the resin plate 45 slide forward relative to each other. For example, if the weight of the occupant PS seated on the vehicle seat 20 is small, the amount of deflection of the resin plate 45 and cushion springs 35A, 35B, and 35C becomes small, and the slide movement of each stopper part 39A, 39B, and 39C stops before the front ends of the stopper parts 39A, 39B, and 39C contact the rear end surfaces of each supported part 57. Furthermore, if the weight of the occupant PS seated on the vehicle seat 20 is large, or if vibration occurs in the vehicle while the occupant PS is seated on the vehicle seat 20, the amount of deflection of the resin plate 45 and cushion springs 35A, 35B, and 35C will increase. However, even in this case, as shown in Figures 6 and 7, there is a high probability that the front ends of the stopper parts 39A, 39B, and 39C will stop sliding before they come into contact with the rear end surfaces of the respective supported parts 57. Note that, for example, when the vehicle 10 is driving off-road, the occupant PS's body will vibrate significantly, and a large force will be applied from the occupant PS to the seat cushion 25, so there is a possibility that the front ends of the stopper parts 39A, 39B, and 39C will come into contact with the rear end surfaces of the respective supported parts 57.

[0035] Furthermore, regardless of the weight of the occupant PS, the force transmitted from the occupant PS (buttock PS1 and thigh PS2) to the central cushion spring 35B tends to be greater than the force transmitted to the cushion springs 35A and 35C located on the left and right sides. Additionally, the initial distance LB1 > initial distances LA1 and LC1. Therefore, regardless of the weight of the occupant PS, the amount of forward sliding of the cushion spring 35B relative to the corresponding supported part 57 tends to be greater than the amount of forward sliding of the cushion springs 35A and 35C relative to the corresponding supported part 57. In other words, it is possible to make the deflection amount of cushion spring 35B greater than the deflection amount of cushion springs 35A and 35C.

[0036] As described above, the seat cushion 25 of this embodiment has a single, elastically deformable resin plate 45 that is supported by three cushion springs 35A, 35B, and 35C arranged in the left-right direction and supported by a cushion frame 27. Thus, the resin plate 45 faces all the cushion springs 35A, 35B, and 35C from above. More specifically, the resin plate 45 faces at least the entire bending portion of all the cushion springs 35A, 35B, and 35C from above. Furthermore, the resin plate 45 is single. Therefore, the planar shape of the resin plate 45 is large. Consequently, when an occupant PS sits on the seat cushion 25, the resin plate 45 with its large planar shape supports the occupant PS's buttocks PS1 and thighs PS2. Therefore, the seat cushion 25 is good at dampening the vibrations of the occupant PS when the vehicle 10 vibrates.

[0037] Furthermore, when the occupant PS applies a load to the seat cushion 25, the cushion springs 35A, 35B, and 35C flex, and the sliding support parts 40A, 40B, and 40C slide relative to the supported part 57 of the resin plate 45. As a result, when the occupant PS sits on the seat cushion 25, the occupant PS is less likely to receive a large reaction force from the resin plate 45. Therefore, the seat cushion 25 of this embodiment is more likely to provide a better seating comfort for the occupant PS compared to a case where the cushion springs 35A, 35B, and 35C do not slide relative to the resin plate 45.

[0038] Furthermore, a fixing structure for securing the cushion springs 35A, 35B, and 35C and the resin plate 45, which are manufactured as separate components, is realized by a simple configuration consisting of fixing parts 37A, 37B, and 37C and a fixed part 49.

[0039] Furthermore, the amount of forward sliding of the cushion springs 35A, 35B, and 35C relative to the resin plate 45 is restricted by a predetermined amount by the stopper portions 39A, 39B, and 39C of the cushion springs 35A, 35B, and 35C and the respective supported portions 57 of the resin plate 45. In other words, the maximum deflection of the cushion springs 35A, 35B, and 35C is restricted by the stopper portions 39A, 39B, and 39C and the respective supported portions 57. Therefore, there is virtually no risk of the cushion springs 35A, 35B, and 35C coming into contact with a component (not shown) located directly below the cushion springs 35A, 35B, and 35C provided in the vehicle seat 20.

[0040] Although embodiments of the present invention have been described above, the present invention is not limited to these embodiments.

[0041] For example, the cushion springs 35A, 35B, and 35C and the resin plate 45 may be integrally molded. This modified example can be implemented, for example, in the form shown in Figure 8. In this modified example, resin collars 80 are slidably attached to the slide support portions 40A, 40B, and 40C of the cushion springs 35A, 35B, and 35C. The resin plate 45 (not shown in Figure 8), which is integrated with the cushion springs 35A, 35B, and 35C, is molded by insert molding in which the cushion springs 35A, 35B, and 35C and the collars 80 are placed in a mold (not shown). At this time, each fixed portion 49 of the resin plate 45 is integrated with the fixed portions 37A, 37B, and 37C, and each collar 80 is integrated with each supported portion 57. The slide support portions 40A, 40B, and 40C of the cushion springs 35A, 35B, and 35C become relatively slidable with respect to the supported portion 57 (collar 80) of the resin plate 45 molded in this way.

[0042] In the embodiment and the above modified examples, slide support portions 40A, 40B, and 40C may be provided at the rear of the cushion springs 35A, 35B, and 35C, and fixing portions 37A, 37B, and 37C located in front of these slide support portions 40A, 40B, and 40C may be provided on the cushion springs 35A, 35B, and 35C. In this case, a supported portion 57 is provided at the rear of the resin plate 45, and a fixed portion 49 is provided at the front of the resin plate 45.

[0043] The number of cushion springs can be any number, as long as there are multiple springs. If the number of cushion springs is odd, it is preferable to make the initial distance of one cushion spring located in the center in the left-right direction longer than the initial distance of the other cushion springs. If the number of cushion springs is even, it is preferable to make the initial distance of the two cushion springs located in the center in the left-right direction longer than the initial distance of the other cushion springs.

[0044] Furthermore, multiple fixed portions of the resin plate 45 may be implemented in the manner shown in Figure 9. These fixed portions include a fixed portion 60 and a fixed portion 61 that are separated from each other. Furthermore, left and right grooves 60a corresponding to the left and right grooves 53 are formed in the fixed portion 60, and front and rear grooves 61a corresponding to the front and rear grooves 55 are formed in the fixed portion 61. Furthermore, left and right extensions 37A2, 37B2, and 37C2 corresponding to the left and right grooves 60a are fitted, and front and rear extensions 37A1, 37B1, and 37C1 are fitted into the front and rear grooves 61a.

[0045] The resin plate may be composed of multiple resin members. For example, the resin plate may be composed of a pair of left and right resin members, and four cushion springs may be provided arranged in a left-right direction. In this case, the left resin member is attached from above to the two left cushion springs, and the right resin member is attached from above to the two right cushion springs. Furthermore, the fixed portions of the left and right resin members are fixed to the fixing portions of each cushion spring, and the supported portions of the left and right resin members are slidably supported to the sliding support portions of each cushion spring. In this case as well, each resin member faces from above with respect to at least the entire bent portion of each cushion spring. Therefore, the planar shape of the resin plate in this modified example is large.

[0046] When the resin plate is divided in the left-right direction, the number of resin components may be three or more.

[0047] The resin plate may also be composed of multiple resin members that are divided in the front-to-back direction.

[0048] Furthermore, if the resin plate is composed of multiple resin members, adjacent resin members may be connected to each other. In this modified example, the resin plate is single. The resin plate in this modified example faces at least the entire bent portion of each cushion spring from above. Therefore, the planar shape of the resin plate in this modified example is large. [Explanation of Symbols]

[0049] 10 vehicles 25 Seat Cushions 27 Cushion Frame 35A 35B 35C Cushion spring 37A 37B 37C Fixed part 37A1 37B1 37C1 Front and rear extensions 37A2 37B2 37C2 Left and right extensions 40A 40B 40C Slide support section 45 Resin plate 47 Main body 49 Fixed part 53 Left and right grooves 55 Front and rear ditches 57 Supported Department 60 Fixed part 60a ditch 61 Fixed part 61a Front and rear ditches LA1 LB1 LC1 Initial distance

Claims

1. Cushion frame and Supported by the cushion frame, the cushion springs have a sliding support portion that extends linearly in the front-rear direction of the seat in a plan view, and a fixing portion that is positioned differently in the front-rear direction from the sliding support portion, and are arranged in the left-right direction of the seat. A resin plate is arranged facing all of the cushion springs from above, and has a fixed portion fixed to the fixed portion and a supported portion supported so as to be slidable relative to the slide support portion, and is elastically deformable, A seat cushion for a vehicle seat equipped with [a specific feature / feature].

2. The seat cushion for a vehicle seat according to claim 1, wherein the cushion spring and the resin plate are configured as separate components.

3. The fixing portion has left and right extensions that extend in the left-right direction of the seat in a plan view, and front and rear extensions that are connected to the left and right extensions and extend in the front-rear direction of the seat in a plan view. The seat cushion for a vehicle seat according to claim 2, wherein the fixed portion is a groove formed on the lower surface of the resin plate, and having left and right grooves that extend in the left-right direction of the seat in a plan view and are fitted into the left and right extensions from above, and front and rear grooves that extend in the front-rear direction of the seat in a plan view and are fitted into the front-rear extensions from above.

4. The aforementioned resin plate, All of the cushion springs and the plate-shaped main body portion facing each other in the vertical direction of the seat, The supported portion protrudes downward from the lower surface of the main body, Equipped with, The fixing portion is located on either the front or rear side of the slide support portion. The seat cushion for a vehicle seat according to claim 2 or 3, wherein the cushion spring is provided with a stopper portion that can contact the end of the supported portion on one side when the slide support portion slides relative to the supported portion on the other side, forward and backward.

5. Equipped with three or more of the aforementioned cushion springs, When the distance from one end of the stopper portion in the front-rear direction of the seat when no occupant is seated on the seat cushion is defined as the initial distance, the seat cushion for a vehicle seat according to claim 4, wherein the initial distance of the cushion spring located in the center in the left-right direction of the seat is longer than the initial distance of the remaining cushion springs.

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