Vehicle seat

Abstract

To provide a vehicle seat that can maintain aesthetic appearance.SOLUTION: A vehicle seat includes: a seat cushion; and a height adjustment mechanism of the seat cushion. The height adjustment mechanism has a link member having one end rotatably supported by the seat cushion and a support member that is provided between a placing surface on which the seat cushion is placed and the seat cushion and rotatably supports the other end of the link member. The support member extends to rear side of the seat cushion with respect to the other end of the link member. The vehicle seat further includes a cover member that covers an end on the rear side of the seat cushion of the support member. An end face on the placing surface side of the link member is provided with a recess recessed to a side opposite to the placing surface side at a position between a first supported section by the support member and a second supported section by the seat cushion.SELECTED DRAWING: Figure 4

Description

[Technical Field]

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

[0002] Patent Documents 1 to 3 describe vehicle seats having height-adjustable mechanisms. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-101845 [Patent Document 2] Japanese Patent Application Publication No. 2019-18711 [Patent Document 3] Japanese Patent Application Laid-Open No. 2016-203949 Summary of the Invention [Problem to be solved by the invention]

[0004] The technique of the present disclosure aims to provide a vehicle seat that maintains aesthetic appearance and ensures a sufficient range of height adjustment for the seat cushion. [Means for solving the problem]

[0005] A vehicle seat according to one embodiment of the disclosed technology comprises a seat cushion and a height adjustment mechanism for the seat cushion, wherein the height adjustment mechanism includes a link member having one end rotatably supported on the seat cushion, and a support member disposed between the seat cushion and a support surface on which the seat cushion is placed, the support member rotatably supporting the other end of the link member, the support member extending rearward of the seat cushion beyond the other end of the link member, and further comprising a cover member covering the rearward end of the support member, and the end face of the link member on the support surface side is provided with a recess recessed on the opposite side to the support surface side, at a position between a first supported portion by the support member and a second supported portion by the seat cushion. [Effects of the Invention]

[0006] According to the technology of the present disclosure, aesthetic appearance can be maintained and a sufficient range of height adjustment for the seat cushion can be ensured. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is an external perspective view showing a schematic configuration of a vehicle seat 100 according to one embodiment of the technology of the present disclosure. [Figure 2] FIG. 2 is a partially enlarged perspective view that schematically illustrates the internal configuration of the vehicle seat 100 shown in FIG. [Figure 3] FIG. 3 is a partially enlarged perspective view that schematically shows the internal configuration of the vehicle seat 100 shown in FIG. 1, seen from a different direction than FIG. [Figure 4] FIG. 4 is a schematic view showing the state as viewed from an arrow A in FIG. [Figure 5] FIG. 5 is a perspective view of the vicinity of the right rear link member 61R of the vehicle seat 100 as viewed from the rear side. [Figure 6] FIG. 6 is a perspective view showing a cross section taken along a plane perpendicular to the left-right direction and passing through the supported portion P1 of the right rear link member 61R. [Figure 7]FIG. 7 is a schematic cross-sectional view (part 1) of a plane perpendicular to the left-right direction and passing through the midpoint in the thickness direction of the right rear link member 61R. [Figure 8] FIG. 8 is a second schematic cross-sectional view of a plane perpendicular to the left-right direction and passing through the midpoint in the thickness direction of the right rear link member 61R. [Figure 9] FIG. 9 is a cross-sectional view (part 3) of the right rear link member 61R taken along a plane perpendicular to the left-right direction and passing through the midpoint in the thickness direction of the right rear link member 61R. DETAILED DESCRIPTION OF THE INVENTION

[0008] FIG. 1 is an external perspective view showing a schematic configuration of a vehicle seat 100 according to an embodiment of the technology of the present disclosure. Vehicles in this specification include automobiles, airplanes, trains, mobile drones, ships, and the like. In the following description, the direction in front of an occupant sitting in the vehicle seat 100 in a normal posture is referred to as the forward direction Fr, and the direction opposite to the forward direction Fr is referred to as the rearward direction Rr, collectively referred to as the front-rear direction. Furthermore, the right side of the occupant when viewed from behind is referred to as the right direction R, and the left side of the occupant is referred to as the leftward direction L, collectively referred to as the left-right direction. Furthermore, the direction perpendicular to the front-rear direction and the left-right direction, and extending from the headrest toward the seat cushion, is referred to as the downward direction D, and the direction opposite to the downward direction D is referred to as the upward direction U, collectively referred to as the up-down direction. The front-rear direction, left-right direction, and up-down direction intersect with each other.

[0009] The vehicle seat 100 includes a seat cushion 1 that supports the buttocks and thighs of an occupant, and a seat back 2 that supports the lumbar region and back of the occupant. In the example of Fig. 1, the vehicle seat 100 is a driver's seat or a passenger's seat of an automobile.

[0010] The seat cushion 1 has a cushion frame 11 (see FIGS. 2 and 3) that forms a skeleton. The cushion frame 11 is covered with a pad (not shown) made of a relatively soft resin foam material such as urethane foam, and is further covered with a trim cover (not shown) that includes a covering material such as leather, woven fabric, or nonwoven fabric.

[0011] The seat back 2 has a back frame 21 (not shown) (see FIGS. 2 and 3) that forms a skeleton. The back frame 21 is covered with a pad (not shown) made of a relatively soft resin foam material such as urethane foam, and is further covered with a trim cover (not shown) that includes a covering material such as leather, woven fabric, or nonwoven fabric.

[0012] The vehicle seat 100 is fixed to the vehicle floor F and includes a pair of rail mechanisms 3 located directly below the seat cushion 1, and a foot bracket (not shown) positioned between the rail mechanisms 3 and the vehicle floor F and supporting the seat cushion 1 from below via the rail mechanisms 3.

[0013] The rail mechanism 3 is positioned directly below the seat cushion 1 to support the seat cushion 1 and is capable of moving the seat cushion 1 in the front-rear direction. The rail mechanism 3 has two long rails that extend in the front-rear direction, specifically a lower rail 31 that serves as a fixed rail and an upper rail 32 that serves as a movable rail. The upper rail 32 is capable of sliding (moving) together with the seat cushion 1 supported on its upper surface in the longitudinal direction of the lower rail 31 (i.e., the front-rear direction).

[0014] Fig. 2 is a partially enlarged perspective view schematically showing the internal configuration of the vehicle seat 100 shown in Fig. 1. Fig. 2 shows a state in which the pad and trim cover of the seat cushion 1 and the pad and trim cover of the seat back 2 have been removed. Fig. 3 is a partially enlarged perspective view schematically showing the internal configuration of the vehicle seat 100 shown in Fig. 1, seen from a different direction than Fig. 2.

[0015] The cushion frame 11 of the seat cushion 1 includes a left side frame 11L and a right side frame 11R that are arranged side by side in the left-right direction and extend in the front-rear direction. In the example of Figures 2 and 3, the left side frame 11L and the right side frame 11R are each a plate-like frame that is thick in the left-right direction.

[0016] The back frame 21 of the seat back 2 includes a left side frame 21L and a right side frame 21R that are arranged side by side in the left-right direction and extend in the up-down direction. In the example of Figures 2 and 3, the left side frame 21L and the right side frame 21R are each a plate-like frame that is thick in the left-right direction.

[0017] The vehicle seat 100 is equipped with a seat lifter device 6 that adjusts the vertical height of the seat cushion 1. The seat lifter device 6 is configured with a parallel link mechanism and includes a left rear link member 61L provided on the left rear, a right rear link member 61R provided on the right rear, a left front link member 62L provided on the left front, a right front link member 62R provided on the right front, and a cylindrical torque rod 60 made of a pipe or the like that rotatably passes through a through-hole that is formed in the rear end of the left side frame 11L and the rear end of the right side frame 11R and that penetrates in the left-right direction. The right rear link member 61R, the left rear link member 61L, the right front link member 62R, and the left front link member 62L each have a plate shape that is thick in the left-right direction.

[0018] A riser 71R is fixed to the rear end of the upper surface of the right upper rail 32, and a riser 72R is fixed to the front end of the riser 71R. A riser 71L is fixed to the rear end of the upper surface of the left upper rail 32, and a riser 72L is fixed to the front end of the riser 71L.

[0019] One end of the left rear link member 61L is rotatably supported by the cushion frame 11, and the other end is rotatably supported by the riser 71L. Specifically, the other end of the left rear link member 61L is rotatably connected to the riser 71L via a hinge pin or the like, and one end is coupled to the left end of the torque rod 60.

[0020] One end of the right rear link member 61R is rotatably supported by the cushion frame 11, and the other end is rotatably supported by the riser 71R. Specifically, the other end of the right rear link member 61R is rotatably connected to the riser 71R via a hinge pin or the like, and one end is coupled to the right end of the torque rod 60.

[0021] One end of the left front link member 62L is rotatably supported by the cushion frame 11, and the other end is rotatably supported by the riser 72L. Specifically, the other end of the left front link member 62L is rotatably connected to the riser 72L via a hinge pin or the like, and one end is rotatably connected to the front end of the left side frame 11L.

[0022] One end of the right front link member 62R is rotatably supported by the cushion frame 11, and the other end is rotatably supported by the riser 72R. Specifically, the right front link member 62R has the other end rotatably connected to the riser 72R via a hinge pin or the like, and one end rotatably connected to the front end of the right side frame 11R.

[0023] A pinion gear 64 is provided at the rear end of the left side frame 11L. A sector gear 67 that meshes with the pinion gear 64 is provided on the left rear link member 61L. The pinion gear 64 is connected to a motor, an operating handle, etc. (not shown), and rotates when the motor is activated or the operating handle is operated. When the pinion gear 64 rotates, the sector gear 67 that meshes with the pinion gear 64, the left rear link member 61L integrated with the sector gear 67, and the torque rod 60 connected to the sector gear 67 rotate around the axis of the torque rod 60. When the torque rod 60 rotates, the right rear link member 61R connected to the torque rod 60 also rotates, and the left front link member 62L and the right front link member 62R also rotate, causing the cushion frame 11 to move up and down.

[0024] In this way, the left rear link member 61L, the right rear link member 61R, the left front link member 62L, the right front link member 62R, the torque rod 60, the left side frame 11L, the right side frame 11R, the riser 71L, the riser 71R, the riser 72L, and the riser 72R form a parallel link mechanism that moves the seat cushion 1 in the vertical direction while maintaining its posture relative to the vehicle floor F.

[0025] FIG. 4 is a schematic view taken along the arrow A in FIG. 3. The right rear link member 61R and the right front link member 62R extend from the front and bottom toward the top and rear when viewed in the left-right direction. The right rear link member 61R is supported by the riser 71R at its front and bottom end EB. FIG. 4 shows a portion P1 of the right rear link member 61R supported by the riser 71R. A rear and top end EA of the right rear link member 61R is connected to the torque rod 60, and the portion of the right rear link member 61R connected to the torque rod 60 forms a portion P2 supported by the seat cushion 1. The right front link member 62R is supported by the riser 72R at its front and bottom end and by the right side frame 11R at its rear and top end.

[0026] Fig. 5 is a perspective view seen from the rear of the vicinity of the right rear link member 61R of the vehicle seat 100. Fig. 6 is a perspective view showing a cross section taken along a plane perpendicular to the left-right direction and passing through the supported portion P1.

[0027] 6, the riser 71R has a flat bottom surface portion 710 having a thickness in the vertical direction and disposed facing the upper surface of the upper rail 32, and a side surface portion 711 rising upward from the outer edge of the bottom surface portion 710, and has a portion extending rearward beyond the supported portion P1. The left side surface portion 711 of the riser 71R supports an end portion EB of the right rear link member 61R.

[0028] 4 to 6, the vehicle seat 100 is provided with a cover member 80 that covers the rear end 712 of the riser 71R. The cover member 80 is provided to prevent the feet, etc. of a person positioned at the rear of the vehicle seat 100 from touching the end 712, to protect the end 712, and to improve the aesthetic appearance of the vehicle seat 100. The cover member 80 is fixed to the riser 71R by, for example, fitting or bonding.

[0029] As shown in Figure 5, the cover member 80 has an approximately U-shaped shape when viewed in the front-to-rear direction, and has a first part 81 arranged opposite the rear end surface of the bottom portion 710 of the riser 71R, and a second part 82 arranged opposite the rear end surface of the side portion 711 of the riser 71R.

[0030] As shown in Figures 4 to 6, the end face 610 of the right rear link member 61R on the vehicle floor F side is provided with a recess 612 recessed on the side opposite to the vehicle floor F side, at a position between the supported portion P1 and the supported portion P2.

[0031] 7 and 8 are schematic cross-sectional views of a plane perpendicular to the left-right direction that passes through the midpoint in the thickness direction of the right rear link member 61R. Fig. 7 shows a state in which the seat cushion 1 is set to the highest position by the seat lifter device 6. Fig. 8 shows a state in which the seat cushion 1 is set to the lowest position by the seat lifter device 6. Figs. 7 and 8 show the center PD of the supported portion P1, the center PU of the supported portion P2, a line segment LA connecting these, and a straight line LB that passes through the midpoint of the line segment LA and is perpendicular to the line segment LA.

[0032] As shown in Fig. 8, the recess 612 is provided in an area that overlaps with the cover member 80 in a vertical direction when the seat cushion 1 is in the lowest position by the seat lifter device 6. With this configuration, even if the right rear link member 61R approaches the cover member 80 due to the load generated when an occupant sits on the seat cushion 1 from the state shown in Fig. 8, the recess 612 can prevent the right rear link member 61R from coming into contact with the cover member 80. This can prevent damage to the cover member 80.

[0033] The area of ​​the end face 610 of the right rear link member 61R closer to the end EB (supported portion P1) than the recess 612 is configured to be able to abut against the riser 71R when the end EA of the right rear link member 61R moves toward the vehicle floor F due to the load of the occupant when seated from the state in which the seat cushion 1 is in the lowest position.

[0034] Specifically, a protrusion 611 that protrudes toward the vehicle floor F is provided in an area of ​​the end face 610 of the right rear link member 61R closer to the end EB (supported portion P1) than the recess 612. The surface of the protrusion 611 is curved.

[0035] Figure 9 shows a state in which the end EA of the right rear link member 61R has moved toward the vehicle floor F from the state shown in Figure 8 due to the load of a seated occupant. As shown in Figure 9, the protrusion 611 is able to come into contact with the bottom surface 710 of the riser 71R. In this way, the protrusion 611 comes into contact with the bottom surface 710 of the riser 71R, thereby preventing the right rear link member 61R from moving further toward the vehicle floor F. This prevents the right rear link member 61R and the right side frame 11R supporting it from coming into contact with the cover member 80 and being damaged.

[0036] As shown in FIG. 7, the protrusion 611 is provided closer to the supported portion P2 (toward the end portion EA) than the intermediate position between the supported portion P1 and the supported portion P2. Even if the protrusion 611 is provided closer to the supported portion P1 than the intermediate position, it is possible to obtain the above-mentioned effect. However, in this case, the supported portion P1 needs to be positioned higher in the vertical direction to ensure a sufficient amount of rotation of the right rear link member 61R. If the protrusion 611 is provided closer to the supported portion P2 than the intermediate position, it is possible to bring the supported portion P1 closer to the vehicle floor F, and it is possible to realize a vehicle seat 100 with a lower hip point.

[0037] In the vehicle seat 100 in which the position of the supported portion P1 is lowered, the distance between the cover member 80 and the end surface 610 of the right rear link member 61R is reduced in the state shown in Fig. 8. In this embodiment, the recess 612 is provided in the end surface 610, so that the area of ​​the end surface 610 that may come into contact with the cover member 80 can be moved upward, and damage to the cover member 80 can be prevented while lowering the hip point.

[0038] The region of the end face 610 closer to the supported portion P1 than the recess 612 may be configured to be linearly connected from the apex of the recess 612 to the end EB, as shown by the imaginary line VL in FIG. 7 . Even with this configuration, the recess 612 can prevent contact between the cover member 80 and the right rear link member 61R. Compared to a configuration in which the apex of the recess 612 is linearly connected from the end EB as shown by the imaginary line VL, this configuration eliminates the portion between the imaginary line VL and the end face 610 in the figure, thereby reducing the mass of the right rear link member 61R. Furthermore, because the contact point between the right rear link member 61R and the riser 71R can be limited to the protrusion 611, the strength of both the riser 71R and the right rear link member 61R can be maintained.

[0039] Although not shown, it is preferable that a cover member covering the rear end of the riser 71L is also provided. The rotation of the left rear link member 61L is restricted by the engagement of the pinion gear 64 and the sector gear 67. Therefore, even when an occupant is seated with the seat cushion 1 in the lowest position, the end of the left rear link member 61L on the torque rod 60 side is restricted from moving downward due to the load. Therefore, it is not essential to provide a recess on the end surface of the left rear link member 61L on the vehicle floor F side to avoid contact with the cover member covering the rear end of the riser 71L. On the other hand, the end of the right rear link member 61R on the torque rod 60 side can move downward due to the load applied to the seat cushion 1. Therefore, the configuration in which the recess 612 and the protrusion 611 described above are provided is particularly effective.

[0040] As described above, this specification discloses the following matters. The following components and the like corresponding to the above-described embodiments are described in parentheses, but the present invention is not limited to these.

[0041] (1) Seat cushion (seat cushion 1) and The seat cushion height adjustment mechanism (seat lifter device 6), the height adjustment mechanism includes a link member (right rear link member 61R) one end of which is rotatably supported on the seat cushion, and a support member (riser 71R) provided between the seat cushion and a support surface (vehicle body floor F) on which the seat cushion is placed, and which rotatably supports the other end of the link member, the support member extends rearward of the seat cushion beyond the other end of the link member, The seat cushion further includes a cover member (cover member 80) that covers the rear end of the support member. A vehicle seat in which a recess (recess 612) recessed on the side opposite the placing surface is provided on the end surface (end surface 610) of the link member on the placing surface side, at a position between the first supported portion (supported portion P1) by the support member and the second supported portion (supported portion P2) by the seat cushion.

[0042] According to (1), even when the load applied at the moment an occupant sits on the seat cushion causes one end of the link member to move toward the support surface and approach the cover member, the recess prevents the link member from coming into contact with the cover member. This prevents damage to the cover member and maintains the aesthetic appearance of the vehicle seat. If the recess is not provided, the first supported portion needs to be located far from the support surface to prevent contact between the link member and the cover member. However, by providing the recess, contact between the link member and the cover member is prevented even when the first supported portion is moved closer to the support surface. This allows the hip point to be lowered and a sufficient range of height adjustment for the seat cushion to be secured.

[0043] (2) The vehicle seat according to (1), The vehicle seat has a recess provided in an area that overlaps with the cover member when viewed in a height direction of the seat cushion when the seat cushion is in a lowest position due to the height adjustment mechanism.

[0044] According to (2), even if the load generated when an occupant sits on the seat cushion causes the link member to approach the cover member, the recessed portion can prevent the link member from coming into contact with the cover member.

[0045] (3) The vehicle seat according to (2), The area of ​​the end face of the link member on the other end side of the recess is configured to be able to abut against the support member when the one end moves from the state in which the seat cushion is in the lowest position toward the placement surface.

[0046] According to (3), the above-mentioned region of the link member abuts against the support member, preventing further movement of the link member toward the support surface. This prevents, for example, the frame of the seat cushion supporting one end of the link member from coming into contact with the cover member. This further prevents damage to the cover member and maintains the aesthetic appearance of the vehicle seat.

[0047] (4) The vehicle seat according to (3), A convex portion (convex portion 611) protruding toward the mounting surface is provided in the region on the other end side of the link member, The vehicle seat is configured so that the protrusion can come into contact with the support member.

[0048] According to (4), the protrusion of the link member abuts against the support member, preventing further movement of the link member toward the mounting surface. This prevents damage to the cover member, etc. In addition, since the protrusion can restrict the movement of the link member, the link member can be made lighter.

[0049] (5) (4) A vehicle seat according to the present invention, The vehicle seat wherein the convex portion is provided closer to the second supported portion than an intermediate position between the first supported portion and the second supported portion.

[0050] According to (5), the support point of the link member on the support member can be brought closer to the placement surface, and the hip point can be lowered. [Explanation of symbols]

[0051] 1 seat cushion 2 seat backs 3 Rail mechanism 6 Seat lifter device 11 Cushion Frame 11L, 21L left side frame 11R, 21R right side frame 21 Back Frame 31 Lower rail 32 Upper rail 60 Torque rod 61L Left rear link member 61R Right rear link member 62L Left front link member 62R Right front link member 64 Pinion gear 67 Sector gear 71L, 71R, 72L, 72R risers 80 Cover member 81 Part 1 82 Part 2 100 Vehicle seats 610 End face 611 Convex part 612 recess 710 Bottom part 711 Side part 712 End P1,P2 Supported part

Claims

1. Seat cushion and a height adjustment mechanism for the seat cushion, the height adjustment mechanism includes a link member having one end rotatably supported on the seat cushion, and a support member provided between the seat cushion and a support surface on which the seat cushion is placed, the support member rotatably supporting the other end of the link member, the support member extends rearward of the seat cushion beyond the other end of the link member, a cover member for covering an end portion of the support member on the rear side of the seat cushion; A vehicle seat in which a recess is provided on the end surface of the link member facing the supporting surface, at a position between a first supported portion by the support member and a second supported portion by the seat cushion, the recess being recessed on the side opposite the supporting surface.

2. 2. The vehicle seat according to claim 1, The vehicle seat, wherein the recess is provided in an area that overlaps with the cover member when viewed in the height direction of the seat cushion when the seat cushion is in the lowest position by the height adjustment mechanism.

3. 3. The vehicle seat according to claim 2, The area of ​​the end face of the link member closer to the other end than the recess is configured to be able to abut against the support member when the one end moves from the state in which the seat cushion is in the lowest position toward the placement surface.

4. 4. The vehicle seat according to claim 3, a protrusion protruding toward the placement surface is provided in the region on the other end side of the link member, The vehicle seat is configured so that the protrusion can come into contact with the support member.

5. 5. The vehicle seat according to claim 4, The vehicle seat is such that the convex portion is provided closer to the second supported portion than an intermediate position between the first supported portion and the second supported portion.

Images