Seat for rolling stock

Abstract

To provide a seat for rolling stock, a seat that can materialize suitable partial pressure while suppressing deterioration of external appearance.SOLUTION: A seat 10 for rolling stock is equipped with a seat cushion 12 and a seat back 14. The seat back 14 is rotatable in the front-back direction of the seat for the seat cushion 12. The skin 52 of the seat cushion 12 and the skin 54 of the seat back 14 are connected in a position for supporting a seated occupant (a position corresponding to a central part 52A, 54A). The rotary center 38 of the seat back 14 is set in a position where the surface and the distance of the skin 50 in the middle position in the seat width direction become 75 mm or less.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] A conventional vehicle seat is disclosed in Patent Document 1. This vehicle seat includes a seat cushion and a seat back that is rotatable in the front-rear direction of the seat relative to the seat cushion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-58495 A Summary of the Invention [Problem to be solved by the invention]

[0004] In order to appropriately distribute the body pressure of a seated occupant, it may be possible to adopt a configuration in which the seat back cover and the seat cushion cover are connected to each other. However, in conventional vehicle seats, if a structure in which the seat back skin and the seat cushion skin are connected is adopted, the skin will wrinkle or become taut when the angle of the seat back is changed, resulting in a poor appearance. Therefore, when considering the appearance of the vehicle seat, it is not possible to adopt a structure in which the seat back skin and the seat cushion skin are connected.

[0005] In consideration of the above, an object of the present invention is to provide a vehicle seat that can achieve appropriate body pressure distribution while suppressing deterioration of the appearance. [Means for solving the problem]

[0006] The vehicle seat of the first embodiment comprises a seat cushion that supports the buttocks of a seated occupant from the underside of the seat, and a seat back that supports the back of the seated occupant from the rear side of the seat and is rotatable in the fore-and-aft direction of the seat relative to the seat cushion, wherein the upholstery of the seat cushion and the upholstery of the seat back are connected at a position that supports the seated occupant, and the center of rotation of the seat back is set at a position such that the distance from the surface of the upholstery at the center position in the width direction of the seat is 75 mm or less.

[0007] In this aspect, the vehicle seat includes a seat cushion that supports the buttocks of a seated occupant from below the seat, and a seat back that supports the back of the seated occupant from the rear side of the seat. The seat back is rotatable in the front-rear direction of the seat with respect to the seat cushion. In this embodiment, the seat cushion cover and the seat back cover are connected at a position where the seated occupant is supported, so that the body pressure of the seated occupant can be appropriately distributed. In this embodiment, the rotation center of the seat back is set at a position where the distance from the surface of the skin at the center position in the seat width direction is 75 mm or less. This makes it possible to reduce the change in the perimeter of the skin surface when the angle of the seat back is changed. As a result, deterioration of the appearance can be suppressed.

[0008] As described above, according to this aspect, it is possible to achieve appropriate body pressure division while suppressing deterioration of the appearance.

[0009] In the vehicle seat of the second aspect, in the first aspect, the rotation center of the seat back is set at a position where the distance between the surface of the cover and the central position in the seat width direction is 50 mm or less.

[0010] In this embodiment, the rotation center of the seat back is set at a position where the distance from the surface of the cover at the center position in the seat width direction is 50 mm or less (preferably 30 mm or less, and more preferably 10 mm or less). This makes it possible to further reduce the change in the circumferential length of the surface of the skin when the seat back angle is changed, thereby further preventing deterioration of the appearance.

[0011] A vehicle seat of a third aspect is a vehicle seat of the first or second aspect, wherein the vehicle seat includes a first link member having a first connecting portion, a second connecting portion, and a third connecting portion, the first connecting portion being rotatably connected to the seat cushion with the seat width direction as an axial direction, a second link member having a fourth connecting portion and a fifth connecting portion, the fourth connecting portion being rotatably connected to the seat cushion with the seat width direction as an axial direction, and a sixth connecting portion and a seventh connecting portion, the sixth connecting portion being rotatably connected to the seat back with the seat width direction as an axial direction, and the seventh connecting portion being connected to the second connecting portion with the seat width direction as an axial direction. and a fourth link member having an eighth connecting portion, a ninth connecting portion and a tenth connecting portion, wherein the eighth connecting portion is rotatably connected to the seat back with the seat width direction as its axial direction, the ninth connecting portion is rotatably connected to the fifth connecting portion with the seat width direction as its axial direction, and the tenth connecting portion is rotatably connected to the third connecting portion with the seat width direction as its axial direction, and wherein the seat back rotates in the fore-and-aft direction relative to the seat cushion as the first link member, the second link member, the third link member and the fourth link member are each displaced.

[0012] In this aspect, the seat cushion and the seat back are connected via the first link member, the second link member, the third link member and the fourth link member configured as described above. This makes it easy to realize a configuration in which the rotation center of the seat back is close to the surface of the skin at the center of the seat width direction, and also makes it possible to realize a configuration in which the rotation center of the seat back is located closer to the front of the seat than the end of the seat back on the lower side of the seat.

[0013] A fourth aspect of the vehicle seat is the third aspect, in which the end portion of the seat cushion on one side in the seat width direction and the end portion of the seat back on one side in the seat width direction are connected via the first link member, the second link member, the third link member and the fourth link member, and the end portion of the seat cushion on the other side in the seat width direction and the end portion of the seat back on the other side in the seat width direction are connected via a hinge member that rotates around the pivot center.

[0014] In this aspect, an end portion of the seat cushion on one side in the seat width direction and an end portion of the seat back on one side in the seat width direction are connected via a first link member, a second link member, a third link member, and a fourth link member, and an end portion of the seat cushion on the other side in the seat width direction and an end portion of the seat back on the other side in the seat width direction are connected via a hinge member that rotates around a rotation center. This makes it possible to eliminate the need to provide the first link member, the second link member, the third link member, and the fourth link member on both sides in the seat width direction, thereby making it possible to prevent an increase in the number of parts of the vehicle seat. Effect of the Invention

[0015] The vehicle seat according to the present invention has an excellent effect of realizing an appropriate body pressure distribution while suppressing deterioration of the appearance. [Brief description of the drawings]

[0016] [Figure 1] 1 is a front view of a vehicle seat according to an embodiment of the present invention; [Diagram 2] 1 is a schematic cross-sectional view (cross-sectional view taken along line 1-1 in FIG. 2) of the vehicle seat of the present embodiment. [Diagram 3] 1 is a side view showing a vehicle seat according to an embodiment of the present invention; [Figure 4] FIG. 2 is a side view showing a schematic view of the link mechanism and the like, illustrating a state in which the seat back is located at a first position. [Diagram 5]FIG. 4 is a side view showing a schematic view of the link mechanism and the like, illustrating a state in which the seat back is located in a second position. [Figure 6] FIG. 2 is a side view showing a schematic view of an actuator and the like. [Figure 7] FIG. 11 is a side view showing a portion of a vehicle seat according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] A vehicle seat 10 according to an embodiment of the present invention will be described with reference to Figs. 1 to 7.

[0018] The arrows FR, UP, and RH shown in the figure indicate the front side, upper side, and right side of the seat, respectively, as seen by an occupant seated in the vehicle seat 10. In the following description, when the terms "front-rear," "up-down," and "left-right" are used, they refer to the front-rear direction of the seat, the top-bottom direction of the seat, and the left-right direction of the seat, unless otherwise specified. The left-right direction of the seat coincides with the width direction of the seat.

[0019] As shown in Figs. 1 to 3, a vehicle seat 10 includes a seat cushion 12 that supports the buttocks of a seated occupant from below, and a seat back 14 that supports the back of the seated occupant from the rear side.

[0020] The seat cushion 12 includes a cushion frame 20 (see FIG. 3) that forms the skeleton of the seat cushion 12, a cushion pad (not shown) attached to the cushion frame 20, and a cushion skin 52 that covers the cushion pad. 3, a part of the cushion frame 20 is depicted by a two-dot chain line. The cushion frame 20 includes a pair of left and right side frame portions 22 that are spaced apart in the seat width direction and extend in the front-rear direction.

[0021] The seat back 14 is configured to include a back frame 24 (see FIG. 3) that forms the skeleton of the seat back 14, a back pad (not shown) attached to the back frame 24, and a back cover 54 that covers the back pad. In Fig. 1, a part of the back frame 24 is drawn with a two-dot chain line. The back frame 24 has a pair of left and right side frame portions 26 that are spaced apart in the seat width direction and extend in the up-down direction. Lower end portions 26A of the pair of left and right side frame portions 26 are connected to rear end portions 22A of the pair of left and right side frame portions 22 of the cushion frame 20 via a link mechanism 16, which will be described later. In Fig. 1, a cover member 28 that covers a part of the link mechanism 16, which will be described later, from the outside in the seat width direction is drawn transparently.

[0022] As shown in FIG. 1, the cushion cover 52 has a central portion 52A corresponding to the central portion of the seat cushion 12, and a pair of side portions 52B corresponding to a pair of side portions of the seat cushion 12.

[0023] The back cover 54 has a central portion 54A corresponding to the central portion of the seat back 14, and a pair of side portions 54B corresponding to a pair of side portions of the seat back 14.

[0024] The cushion skin 52 and the back skin 54 are connected to each other at positions corresponding to the central portions 52A and 54A. On the other hand, the cushion skin 52 and the back skin 54 are not connected to each other at positions corresponding to the pair of side portions 52B and 54B. The cushion skin 52 and the back skin 54 may be connected to each other as a single skin, or may be connected to each other by being sewn together.

[0025] The cushion cover 52 and the back cover 54 are collectively referred to as the cover 50 of the vehicle seat 10. The cushion cover 52 may be referred to as the cover 52 of the seat cushion 12, and the back cover 54 may be referred to as the cover 54 of the seat back 14.

[0026] The vehicle seat 10 also includes a link mechanism 16 that connects the seat cushion 12 and the seat back 14, and an actuator 18 (see FIG. 6) that reclines the seat back 14 when actuated.

[0027] The link mechanism 16 includes a first link member 30, a second link member 32, a third link member 34 and a fourth link member 36 which connect the lower end portion 26A of the left side frame portion 26 of the back frame 24 and the rear end portion 22A of the left side frame portion 22 of the cushion frame 20. The link mechanism 16 also includes a first link member 30, a second link member 32, a third link member 34 and a fourth link member 36 that connect the lower end portion 26A of the right side frame portion 26 of the back frame 24 and the rear end portion 22A of the right side frame portion 22 of the cushion frame 20. The first link member 30, the second link member 32, the third link member 34, and the fourth link member 36 on the left side and the first link member 30, the second link member 32, the third link member 34, and the fourth link member 36 on the right side are configured symmetrically in the seat width direction. Therefore, in the following, only the first link member 30, the second link member 32, the third link member 34, and the fourth link member 36 on the left side will be described, and a description of the first link member 30, the second link member 32, the third link member 34, and the fourth link member 36 on the right side will be omitted.

[0028] 3 and 4 respectively show the vehicle seat 10 and the link mechanism 16 with the seat back 14 in a first position. When the seat back 14 is in the first position, the occupant can be seated in the vehicle seat 10 in a position that allows the occupant to see ahead. The following description of the first link member 30, the second link member 32, the third link member 34, and the fourth link member 36 will be given on the assumption that the seat back 14 is located at the first position. Note that Figures 4 and 5 are schematic diagrams showing the link mechanism 16. Therefore, there are some parts where the configuration shown in Figures 4 and 5 does not match the configuration shown in Figure 3 in terms of details.

[0029] As shown in Fig. 4, the first link member 30 is formed in a plate shape extending with the thickness direction being the left-right direction, and is formed in an elongated shape inclined rearward as it goes upward as viewed from the left side. The lower end of this first link member 30 is a first connecting portion 30A. The upper end of the first link member 30 is a second connecting portion 30B. Furthermore, the middle portion of the first link member 30 in the up-down direction is a third connecting portion 30C. The first connecting portion 30A is connected to the rear end portion 22A of the side frame portion 22 of the cushion frame 20 so as to be rotatable with the seat width direction as the axial direction.

[0030] The second link member 32 is formed in a plate shape extending in the left-right direction as a thickness direction, and is formed in an elongated shape inclined toward the rear as it goes upward when viewed from the left side. The lower end of this second link member 32 is a fourth connecting portion 32A. The upper end of the second link member 32 is a fifth connecting portion 32B. The fourth connecting portion 32A is connected to the rear end portion 22A of the side frame portion 22 of the cushion frame 20 so as to be rotatable with the seat width direction as the axial direction. In a state in which the fourth connecting portion 32A is connected to the rear end portion 22A of the side frame portion 22 of the cushion frame 20 so as to be rotatable with the seat width direction as the axial direction, the fourth connecting portion 32A is located rearward of the first connecting portion 30A of the first link member 30.

[0031] The third link member 34 is formed in a plate shape extending with the thickness direction being the left-right direction, and is formed in an elongated shape with the longitudinal direction being the front-rear direction when viewed from the left side. The front end of this third link member 34 is a sixth connecting portion 34A. The rear end of the third link member 34 is a seventh connecting portion 34B. The sixth connecting portion 34A is connected to the lower end portion 26A of the side frame portion 26 of the back frame 24 so as to be rotatable with the seat width direction as the axial direction. The seventh connecting portion 34B is connected to the second connecting portion 30B of the first link member 30 so as to be rotatable with the seat width direction as the axial direction.

[0032] The fourth link member 36 is formed in a plate shape extending with the thickness direction being the left-right direction, and is formed in an elongated shape with the longitudinal direction being the longitudinal direction when viewed from the left side. The front end of this fourth link member 36 is an eighth connecting portion 36A. The rear end of the fourth link member 36 is a ninth connecting portion 36B. Furthermore, the middle portion of the fourth link member 36 in the longitudinal direction is a tenth connecting portion 36C. The eighth connecting portion 36A is connected to the lower end portion 26A of the side frame portion 26 of the back frame 24 so as to be rotatable with the seat width direction as the axial direction. In a state in which the eighth connecting portion 36A is connected to the lower end portion 26A of the side frame portion 26 of the back frame 24, the eighth connecting portion 36A is located forward and below the sixth connecting portion 34A of the third link member 34, and is located above the first connecting portion 30A of the first link member 30. The ninth connecting portion 36B is connected to the fifth connecting portion 32B of the second link member 32 so as to be rotatable about an axial direction that corresponds to the seat width direction. Furthermore, the tenth connecting portion 36C is connected to the third connecting portion 30C of the first link member 30 so as to be rotatable about an axial direction that corresponds to the seat width direction.

[0033] Further, the above-described first link member 30 and second link member 32 are positioned outboard of the third link member 34 and fourth link member 36 in the seat width direction.

[0034] Hereinafter, the axial center of the connection portion between the first connection portion 30A of the first link member 30 and the rear end portion 22A of the side frame portion 22 of the cushion frame 20 will be referred to as a first link axis C1. Also, the axial center of the connection portion between the fourth connection portion 32A of the second link member 32 and the rear end portion 22A of the side frame portion 22 of the cushion frame 20 will be referred to as a second link axis C2. Further, the axial center of the connection portion between the fifth connecting portion 32B of the second link member 32 and the ninth connecting portion 36B of the fourth link member 36 will be referred to as a third link axis C3. The axial center of the connection portion between the third connecting portion 30C of the first link member 30 and the tenth connecting portion 36C of the fourth link member 36 will be referred to as a fourth link axis C4. Moreover, the axis center of the connection portion between the second connecting portion 30B of the first link member 30 and the seventh connecting portion 34B of the third link member 34 will be referred to as a fifth link axis C5. The axis center of the connection portion between the sixth connecting portion 34A of the third link member 34 and the lower end portion 26A of the side frame portion 26 of the back frame 24 will be referred to as a sixth link axis C6. The axis center of the connection portion between the eighth connecting portion 36A of the fourth link member 36 and the lower end portion 26A of the side frame portion 26 of the back frame 24 will be referred to as a seventh link axis C7.

[0035] When viewed from the left side, the length of the line L1 connecting the first link shaft C1 and the fourth link shaft C4 is the same as the length of the line L2 connecting the second link shaft C2 and the third link shaft C3, and the lines L1 and L2 are parallel to each other. In addition, when viewed from the left side, the length of the line L3 connecting the first link shaft C1 and the second link shaft C2 is the same as the length of the line L4 connecting the fourth link shaft C4 and the third link shaft C3, and the lines L3 and L4 are parallel to each other. Furthermore, the lengths of the lines L1 and L2 are longer than the lengths of the lines L3 and L4, so that when viewed from the left side, the lines L1, L2, L3, and L4 form a parallelogram. The lengths of the lines L1 and L2 may be set to be the same as the lengths of the lines L3 and L4, or the lengths of the lines L1 and L2 may be set to be shorter than the lengths of the lines L3 and L4.

[0036] In addition, when viewed from the left side, the length of the line L5 connecting the seventh link shaft C7 and the sixth link shaft C6 is the same as the length of the line L6 connecting the fourth link shaft C4 and the fifth link shaft C5, and the lines L5 and L6 are parallel to each other. In addition, when viewed from the left side, the length of the line L7 connecting the seventh link shaft C7 and the fourth link shaft C4 is the same as the length of the line L8 connecting the sixth link shaft C6 and the fifth link shaft C5, and the lines L7 and L8 are parallel to each other. Furthermore, the lengths of the lines L5 and L6 are longer than the lengths of the lines L7 and L8 and shorter than the lengths of the lines L1 and L2. Moreover, the lengths of the lines L7 and L8 are shorter than the lengths of the lines L3 and L4. The lengths of the lines L5 and L6 may be set to be the same as the lengths of the lines L7 and L8, or the lengths of the lines L5 and L6 may be set to be shorter than the lengths of the lines L7 and L8.

[0037] As shown in Figures 3 and 4, by setting the first link member 30, the second link member 32, the third link member 34 and the fourth link member 36 that constitute the link mechanism 16 as described above, the rotation center 38 of the seat back 14 is located forward of the lower end portion 26A of the side frame portion 26 of the back frame 24 and forward of the rear end portion 22A of the side frame portion 22 of the cushion frame 20. As shown in Fig. 2, the rotation center 38 of the seat back 14 is close to the surface of the skin 50 at the center position in the seat width direction (the position corresponding to the center portions 52A, 54A). As a result, as shown in Fig. 2, the change in the perimeter of the surface of the skin 50 when the seat back 14 is rotated to change the angle is small. In Fig. 2, the normal upright state of the seat back 14 is shown by a solid line, and the state in which the seat back 14 is tilted backward is shown by a two-dot chain line. The surface of the skin 50 here means the surface of the skin 50 when no passenger is seated.

[0038] As shown in FIG. 6, the actuator 18 provided between the seat back 14 and the seat cushion 12 is a type of actuator having a lead screw 18A that is displaced linearly in one direction. The actuator 18 includes a lead screw 18A and an actuator body 18B that linearly displaces the lead screw 18A in one direction. The actuator 18 also includes a back frame fixing portion 18C formed integrally with the actuator body portion 18B, and a cushion frame fixing portion 18D provided at the end of the lead screw 18A opposite to the actuator body portion 18B. The actuator 18 is disposed between the pair of left and right side frame portions 26 of the back frame 24 and between the pair of left and right side frame portions 22 of the cushion frame 20 . A back frame fixing portion 18C of the actuator 18 is directly or indirectly fixed to the back frame 24. A cushion frame fixing portion 18D of the actuator 18 is directly or indirectly fixed to the cushion frame 20. When the seat back 14 is in the first position, the axial direction of the lead screw 18A of the actuator 18 is oriented in the up-down direction. A part of the actuator 18 overlaps with the link mechanism 16 in the seat width direction in a side view of the seat.

[0039] FIG. 7 is a side view showing a portion of a vehicle seat 40 according to another embodiment. In the vehicle seat 40 shown in FIG. 7, a portion of the right side frame portion 22 of the cushion frame 20 corresponding to the rotation center 38 is connected to a lower end of the right side frame portion 26 of the back frame 24 via a hinge member 42. The hinge member 42 is rotatable around the rotation center 38. In this configuration, it is not necessary to provide the first link member 30, the second link member 32, the third link member 34, and the fourth link member 36 on both sides in the seat width direction. This makes it possible to suppress an increase in the number of parts of the vehicle seat 40. Note that the same reference numerals are used to denote the members and parts of the vehicle seat 40 corresponding to the above-mentioned vehicle seat 10.

[0040] <Action and effect> Next, the effects of this embodiment will be described.

[0041] 1 and 2, a vehicle seat 10 includes a seat cushion 12 that supports the buttocks of a seated occupant from the lower side of the seat, and a seat back 14 that supports the back of the seated occupant from the rear side of the seat. The seat back 14 is rotatable in the front-rear direction of the seat with respect to the seat cushion 12. 1 and 2, in this embodiment, the cover 52 of the seat cushion 12 and the cover 54 of the seat back 14 are connected at positions that support the seated occupant (positions corresponding to the central portions 52A and 54A). Therefore, the body pressure of the seated occupant can be appropriately distributed. In this embodiment, the rotation center 38 of the seat back 14 is set at a position where the distance from the surface of the skin 50 at the center position in the seat width direction (see FIG. 1) is 75 mm or less (preferably 50 mm or less, more preferably 30 mm or less, and even more preferably 10 mm or less). This makes it possible to reduce the amount of change in the circumferential length of the skin surface when the angle of the seat back 14 is changed. As a result, deterioration of the appearance can be suppressed.

[0042] As described above, according to this embodiment, it is possible to realize appropriate body pressure division while suppressing deterioration of the appearance.

[0043] In this embodiment, the vehicle seat 10 includes a first link member 30, a second link member 32, a third link member 34, and a fourth link member 36. The first link member 30 has a first connecting portion 30A, a second connecting portion 30B, and a third connecting portion 30C. The first connecting portion 30A is connected to the seat cushion 12 so as to be rotatable with the seat width direction as the axial direction. The second link member 32 has a fourth connecting portion 32A and a fifth connecting portion 32B. The fourth connecting portion 32A is connected to the seat cushion 12 so as to be rotatable with the seat width direction as the axial direction. The third link member 34 has a sixth connecting portion 34A and a seventh connecting portion 34B. The sixth connecting portion 34A is connected to the seat back 14 so as to be rotatable with the seat width direction as the axial direction, and the seventh connecting portion 34B is connected to the second connecting portion 30B so as to be rotatable with the seat width direction as the axial direction. The fourth link member 36 has an eighth connecting portion 36A, a ninth connecting portion 36B, and a tenth connecting portion 36C. The eighth connecting portion 36A is connected to the seat back 14 so as to be rotatable with the seat width direction as the axial direction, the ninth connecting portion 36B is connected to the fifth connecting portion 32B so as to be rotatable with the seat width direction as the axial direction, and the tenth connecting portion 36C is connected to the third connecting portion 30C so as to be rotatable with the seat width direction as the axial direction. The seat back 14 is adapted to rotate in the front-rear direction of the seat relative to the seat cushion 12 by the first link member 30, the second link member 32, the third link member 34 and the fourth link member 36 being displaced. That is, in this embodiment, the seat cushion 12 and the seat back 14 are connected via the first link member 30, the second link member 32, the third link member 34 and the fourth link member 36 configured as described above. This makes it easy to realize a configuration in which the rotation center 38 of the seat back 14 is close to the surface of the skin 50 at the center position in the seat width direction. Also, it makes it possible to realize a configuration in which the rotation center 38 of the seat back 14 is located closer to the front of the seat than the end of the seat back 14 on the seat lower side.

[0044] In this embodiment, an end portion of the seat cushion 12 on one side in the seat width direction and an end portion of the seat back 14 on one side in the seat width direction are connected via a first link member 30, a second link member 32, a third link member 34, and a fourth link member 36. Meanwhile, an end portion of the seat cushion 12 on the other side in the seat width direction and an end portion of the seat back 14 on the other side in the seat width direction may be connected via a hinge member 42 that rotates around a rotation center 38. In this case, it is not necessary to provide the first link member 30, the second link member 32, the third link member 34, and the fourth link member 36 on both sides in the seat width direction, thereby making it possible to suppress an increase in the number of parts of the vehicle seat 10.

[0045] 〔supplementary explanation〕 In this embodiment, an example has been described in which a first link member 30, a second link member 32, a third link member 34 and a fourth link member 36 are provided on the left and right sides of the seat cushion 12 and the seat back 14, respectively, but the present invention is not limited to this. For example, as in the vehicle seat 40 shown in FIG. 7, the first link member 30, the second link member 32, the third link member 34, and the fourth link member 36 may be provided only on the left side of the seat cushion 12 and the seat back 14, and the first link member 30, the second link member 32, the third link member 34, and the fourth link member 36 may not be provided on the right side of the seat cushion 12 and the seat back 14. In addition, the first link member 30, the second link member 32, the third link member 34 and the fourth link member 36 may be provided only on the right side of the seat cushion 12 and the seat back 14, and the first link member 30, the second link member 32, the third link member 34 and the fourth link member 36 may not be provided on the left side of the seat cushion 12 and the seat back 14. Furthermore, the first link member 30, the second link member 32, the third link member 34, and the fourth link member 36 may not be provided on either the left or right side of the seat cushion 12 and the seat back 14. In this case, a hinge member 42 that rotates around a rotation center 38 may be provided on either the left or right side of the seat cushion 12 and the seat back 14.

[0046] In this embodiment, an example is described in which the actuator 18 has a lead screw 18A that is displaced linearly in one direction, but the present invention is not limited to this. For example, an actuator of another configuration may be used, or an actuator may not be provided at all.

[0047] Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and it is of course possible to implement the present invention in various other modified forms without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0048] 10 Vehicle seats 12 Seat cushion 14 Seat back 30 First link member 30A First connection part 30B Second connection part 30C Third connection part 32 Second link member 32A Fourth connection part 32B Fifth connection part 34 Third link member 34A Sixth connection part 34B Seventh connection part 36 Fourth link member 36A Eighth connection part 36B Ninth connection part 36C 10th connection part 38 Rotation Center 40 Vehicle seats 42 Hinge member 52 Cushion cover (seat cushion cover) 54 Back cover (seat back cover)

Claims

1. a seat cushion that supports the buttocks of a seated occupant from below the seat; a seat back that supports a back of a seated occupant from a rear side of the seat and is rotatable in a front-rear direction of the seat with respect to the seat cushion; Equipped with The seat cushion cover and the seat back cover are connected at a position where they support a seated occupant, The rotation center of the seat back is set at a position where the distance between the center position in the seat width direction and the surface of the skin is 75 mm or less. Vehicle seat.

2. The rotation center of the seat back is set at a position where the distance between the center position in the seat width direction and the surface of the skin is 50 mm or less. The vehicle seat according to claim 1 .

3. The vehicle seat includes: a first link member having a first connecting portion, a second connecting portion, and a third connecting portion, the first connecting portion being connected to the seat cushion so as to be rotatable about an axial direction of the seat width direction; a second link member having a fourth connecting portion and a fifth connecting portion, the fourth connecting portion being connected to the seat cushion so as to be rotatable about an axial direction of the seat width direction; a third link member having a sixth connecting portion and a seventh connecting portion, the sixth connecting portion being connected to the seat back so as to be rotatable about an axial direction of the seat width direction, and the seventh connecting portion being connected to the second connecting portion so as to be rotatable about an axial direction of the seat width direction; a fourth link member having an eighth connecting portion, a ninth connecting portion, and a tenth connecting portion, the eighth connecting portion being connected to the seat back so as to be rotatable with the seat width direction as an axial direction, the ninth connecting portion being connected to the fifth connecting portion so as to be rotatable with the seat width direction as an axial direction, and the tenth connecting portion being connected to the third connecting portion so as to be rotatable with the seat width direction as an axial direction; Equipped with When the first link member, the second link member, the third link member, and the fourth link member are each displaced, the seat back rotates in a seat front-rear direction relative to the seat cushion. The vehicle seat according to claim 1 .

4. an end portion of the seat cushion on one side in a seat width direction and an end portion of the seat back on one side in a seat width direction are connected via the first link member, the second link member, the third link member, and the fourth link member, an end portion of the seat cushion on the other side in the seat width direction and an end portion of the seat back on the other side in the seat width direction are connected to each other via a hinge member that rotates around the rotation center; The vehicle seat according to claim 3.

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