JP2024054023A - Vehicle seat - Google Patents

Abstract

[Problem] To correct the seated posture of a seated occupant P in accordance with the movement of the seated occupant P. [Solution] A vehicle seat S equipped with a seat cushion section 100 that supports the buttocks to thighs of the seated occupant P and a seat back section 300 that supports the back of the seated occupant P, the vehicle seat S is equipped with a posture correction section 200 formed inside a seat frame structure SH, and a movable section 400 that allows the posture correction section 200 to move in accordance with the movement of the seated occupant P, the posture correction section 200 is engaged with the movable section 400 so as to be movable in the front-rear direction of the vehicle, the posture correction section 200 and the seat back section 300 are connected by the movable section 400, and the posture correction section 200 is biased in a direction toward the seat back section 300. [Selected Figure] Figure 2

Description

The present invention relates to a vehicle seat.

In general, vehicle seats need to be made more comfortable to sit on in order to stabilize the driver's posture while driving and reduce fatigue during long drives.
Furthermore, in order to stably operate the vehicle, it is desirable to support the trunk of the seated occupant and stabilize the line of sight and the movements of the arms and legs of the seated occupant.
On the other hand, in order to support the trunk of the seated occupant, it is necessary to narrow the distance between the vehicle seat and the seated occupant, which may make the occupant feel cramped. Therefore, there is a demand for a seat that can stably support the trunk without feeling cramped and provides a comfortable seating position with a degree of freedom.

In response to such demands, a vehicle seat has been proposed that has a seat portion (seat cushion portion) and a back portion (seat back portion) of the vehicle seat, and has a low-rigidity area in the front portion of the seat cushion that is softer than the high-rigidity area in the rear portion, thereby providing the seat cushion with a stiffness distribution in the fore-and-aft direction, thereby stabilizing the pelvic position of the seated occupant (see, for example, Patent Document 1).

Japanese Patent No. 5594366

Here, when the pelvis of a seated occupant is viewed from the side, it can be likened to, for example, an inverted triangle shape. In this case, when the seated occupant drives for a long time or performs driving operations, the seated posture of the seated occupant changes so that the apex of the inverted triangle on the lower side of the vehicle moves toward the front side of the vehicle, and the line perpendicular to the apex of the inverted triangle on the lower side of the vehicle and the side opposite to the apex (the inclination line of the seating posture) tilts toward the rear side of the vehicle seat.
Therefore, in order to maintain a stable seated posture of a seated occupant, it is necessary to restrict the apex of the inverted triangle on the lower side of the vehicle from moving toward the front of the vehicle and to maintain the direction of the inclination line of the seated posture.

However, the technology in Patent Document 1 has an issue in that when an occupant sits in the seat and the inclination line of the seated occupant's seated posture falls toward the rear of the vehicle due to driving operations, etc., the inclination line of the seated occupant's seated posture is not corrected, and there is a risk that the seated occupant will be held in the changed seated posture.

Therefore, the present invention has been made in consideration of the above-mentioned problems, and provides a vehicle seat that corrects the seating posture of a seated occupant in accordance with the movement of the seated occupant.

Form 1: One or more embodiments of the present invention propose a vehicle seat that includes a posture correction unit that is configured inside the seat frame structure and corrects the seating posture of the seated occupant, and a movable unit that allows the posture correction unit to move in response to pressure input from the seated occupant to the seat cushion unit or the seat back unit, the posture correction unit is engaged with the movable unit so as to be movable in the front-rear direction of the vehicle, the posture correction unit and the seat back unit are connected by the movable unit, and the posture correction unit is biased in a direction toward the seat back unit.

Form 2: One or more embodiments of the present invention propose a vehicle seat in which the posture correction section includes a posture correction cross member that is connected to both ends in the vehicle width direction to form a U-shape and that is provided on the inside vehicle lower side of the seat cushion section and extends in the vehicle width direction, a posture correction member that is fixed to the posture correction cross member and extends in the vehicle width direction, and a posture correction rod section whose rear end is rotatably engaged with the posture correction cross member with the vehicle width direction as an axis and whose front end is rotatably fixed to the seat frame structure with the vehicle width direction as an axis, and the movable section is disposed inside the seat frame structure and includes a seat correction rail section that engages the posture correction cross member so as to be movable in the vehicle front-rear direction, and a connecting section that connects the posture correction section and the seat back section in an interlocking manner, and both ends in the vehicle width direction of the posture correction cross member are engaged with the seat correction rail section, and one end of the auxiliary rod is rotatably fixed to the connecting section and biased toward the seat back section.

Mode 3: One or more embodiments of the present invention propose a vehicle seat in which the posture correction member is made of woven or nonwoven fabric and is formed into a substantially rectangular shape with the vehicle width direction as the long side, the vehicle lower side edge of the posture correction member is fixed to the posture correction cross member, and both side edges of the posture correction member in the vehicle width direction are fixed to the auxiliary bar.

According to one or more embodiments of the present invention, the seated posture of a seated occupant can be corrected in response to the movement of the seated occupant.

1 is a configuration diagram of a vehicle seat according to an embodiment of the present invention; 1 is a perspective view of a vehicle seat according to an embodiment of the present invention, seen from above with a seat cover removed and a cushion visible; 2 is a perspective view of a seat cushion portion of the vehicle seat shown in FIG. 1, seen from above with a seat cover and a cushion removed; FIG. 2 is a perspective view of the posture correcting unit and the movable unit of the vehicle seat shown in FIG. 1, seen from above with a seat cover and a cushion removed. FIG. 2 is a side view of the vehicle seat shown in FIG. 1 with a seat cover removed and a seated occupant seated therein; FIG. 6 is a side view showing an action when a stress is input to a seat back portion of the vehicle seat shown in FIG. 5 . 6 is a side view showing an action when a stress is input to a seat cushion portion of the vehicle seat shown in FIG. 5 .

Below, a vehicle V to which the vehicle seat S according to this embodiment is applied will be described with reference to Figures 1 to 7. Note that the arrow FR, as appropriate shown in the drawings, indicates the front of the vehicle (front) shown in Figure 1, the arrow UP indicates the upward direction as seen from the front, and the arrow LH indicates the leftward direction as seen from the front. In addition, in the following description, when the up/down, front/rear, and left/right directions are used, they refer to the up/down direction as seen from the front, the front/rear direction as seen from the front, and the left/right direction as seen from the front, unless otherwise specified.

<Embodiment>
The configuration of a vehicle seat S according to this embodiment, which is provided in a vehicle V, will be described with reference to FIGS. 1 to 4. FIG.
In the following, a vehicle seat S that is installed in a driver's seat of a vehicle V will be described as an example.

<Configuration of vehicle seat S>
1, the vehicle seat S includes a slide rail portion 10, a headrest portion 20, a seat cushion portion 100, and a seat back portion 300. The vehicle seat S is disposed on the vehicle upper side of a floor panel of the vehicle V (not shown), and is fixed to the floor panel of the vehicle V via the slide rail portion 10.

The slide rail section 10 is fixed to the floor panel of the vehicle V and extends in the fore-and-aft direction of the vehicle. The slide rail section 10 is made of a metal or other material and is U-shaped with an opening on the upper side of the vehicle. The legs of the vehicle seat S are arranged on the slide rail section 10 so as to be movable in the fore-and-aft direction of the vehicle.

The headrest portion 20 is provided at the center of the upper end of the seat back portion 300 in the vehicle width direction, and protrudes from the seat back portion 300 toward the upper side of the vehicle. The headrest portion 20 is provided with a substantially long rod-shaped stay 21, which is inserted into the seat back portion 300 from above. The headrest portion 20 is supported by the seat back portion 300. The outer surface of the headrest portion 20 is covered with a seat cover 22 made of a material such as cloth or leather.

<Configuration of seat cushion portion 100>
The seat cushion portion 100 is a seating surface for a seated occupant P, and is disposed in a lower portion of the vehicle seat S to support the buttocks to thighs of the seated occupant P. The outer surface of the seat cushion portion 100 is covered with a seat cover 110 formed of a material such as cloth or leather. The inner configuration of the seat cushion portion 100 will be described below.

<Regarding the Inner Configuration of the Seat Cushion Part 100>
As shown in FIG. 2, on the inside of the seat cushion portion 100, there are arranged a cushion 120, a seat frame structure SH, a posture correction portion 200, and a movable portion 400 which will be described later.

(Regarding the cushion 120)
The cushion 120 is made of a material such as urethane and is formed so as to cover the vehicle upper side of the seat cushion portion 100. The cushion 120 is disposed in close contact with the inner side of the seat cover 110 on the vehicle upper side of the seat cushion portion 100.

(Regarding the seat frame structure SH)
The seat frame structure SH constitutes the framework of the seat cushion portion 100, and is provided on the vehicle lower side of the cushion 120, as shown in the hatched portion in Fig. 2. The seat frame structure SH includes a front seat frame 130, a side seat frame 140, a back seat frame 150, a lower seat frame 160, and a frame wire 170.

The front seat frame 130 is formed of a metal or other member and extends in the vehicle width direction, and is disposed on the vehicle front side of the seat cushion portion 100. The front seat frame 130 is rotatably fixed by hinge portions HG at the vehicle front ends of the side seat frames 140 disposed on both sides in the vehicle width direction.

The side seat frames 140 are made of metal or other materials and are formed into a generally long plate shape extending in the front-rear direction of the vehicle with the plate thickness direction being the vehicle width direction, and are disposed on both sides of the seat cushion section 100 in the vehicle width direction. A back seat frame 150 extending in the vehicle width direction is connected to the rear end of the pair of side seat frames 140, and a side back frame 330 (described later) is rotatably connected to the upper side of the back seat frame 150.

The backseat frame 150 is made of metal or other material and is formed into a pipe shape extending in the vehicle width direction, and is disposed on the vehicle rear side of the seat cushion portion 100. Both ends of the backseat frame 150 in the vehicle width direction are connected to a pair of side seat frames 140, and a side back frame 330 (described later) is rotatably connected to the vehicle upper side of the backseat frame 150. In addition, a frame wire 170 (described later) is fixed to the backseat frame 150.

The lower seat frame 160 is made of a metal or other material and is formed into a generally long plate shape that extends in the vehicle width direction with the plate thickness direction being in the vertical direction of the vehicle, and is disposed on the vehicle lower side of the seat cushion portion 100. Specifically, both side ends in the vehicle width direction of the lower seat frame 160 are respectively joined to the vehicle lower sides of the side seat frames 140 by welding or the like, and are bridged between the pair of side seat frames 140.

The frame wires 170 extend in the front-rear direction of the vehicle on the vehicle lower side of the seat cushion portion 100. The frame wires 170 are S-shaped springs made of metal or the like having spring properties that support the buttocks of the seated occupant P, and multiple wires (four in this embodiment) are arranged between the front seat frame 130 and the back seat frame 150.

(Regarding posture correction unit 200)
The posture correction unit 200 is configured to be surrounded by the seat frame structure SH inside the seat frame structure SH as shown by the shaded area in Fig. 2. In addition, a cushion 120 is provided on the vehicle upper side of the posture correction unit 200.
Specifically, the posture correction section 200 is disposed on the vehicle lower side of the cushion 120 and on the vehicle upper side of the frame wire 170, and is disposed inside the seat frame structure SH surrounded by the front seat frame 130, the side seat frame 140, and the back seat frame 150.
As shown in FIG. 3 , the posture correction unit 200 includes a posture correction cross member 210 , a posture correction member 220 , and a posture correction rod unit 230 .

The posture correction cross member 210 is provided extending in the vehicle width direction on the vehicle lower side of the seat cushion part 100. The posture correction cross member 210 is formed in a substantially round bar shape from a member such as metal. Both ends in the vehicle width direction of the posture correction cross member 210 are engaged with the seating position correction rail part 410 described later via bearings or the like, and are movable in the vehicle front-rear direction.
In addition, one end of a substantially rectangular auxiliary rod 210a is connected by welding or the like to both ends of the posture correction cross member 210 in the vehicle width direction toward the radially outward direction perpendicular to the axial direction of the posture correction cross member 210. The posture correction cross member 210 and the auxiliary rods 210a on both sides in the vehicle width direction form a U-shape. The auxiliary rods 210a on both sides in the vehicle width direction are connected to the posture correction cross member 210 at substantially the same angle. The other end of the auxiliary rod 210a is rotatably engaged with a wire WR included in the movable part 400 described later.
In addition, one end of a posture correction rod portion 230 is rotatably engaged with the posture correction cross member 210 .

The posture correction member 220 extends in the vehicle width direction and is fixed to the posture correction cross member 210. Specifically, the edge of the posture correction member 220 on the lower side of the vehicle is fixed to the posture correction cross member 210 by gluing or the like. In addition, both sides of the posture correction member 220 in the vehicle width direction are fixed to the auxiliary rod 210a by gluing or the like. The posture correction member 220 is formed in a substantially rectangular shape with its long side extending in the vehicle width direction, for example, from a flexible material such as woven or nonwoven fabric or leather.

The posture correction rod section 230 is formed into a generally rod-like shape from a member such as metal, and is provided on the vehicle front side of the seat cushion section 100, extending in the vehicle front-rear direction. The vehicle front end of the posture correction rod section 230 is fixed to the vehicle front lower side of the front seat frame 130 so as to be rotatable in the vehicle up-down direction with the vehicle width direction as its axis. The fixing point of the vehicle front end of the posture correction rod section 230 is fixed further forward of the hinge section HG at which the front seat frame 130 is fixed to the side seat frame 140. In addition, the vehicle rear end of the posture correction rod section 230 is rotatably engaged with the posture correction cross member 210 with the vehicle width direction as its axis.

<Configuration of seat back portion 300>
The seat back portion 300 supports the back of a seated occupant P. As shown in Fig. 1, the seat back portion 300 is disposed in an upright state facing the vehicle vertical direction on the vehicle rear side of the seat cushion portion 100. The outer surface of the seat back portion 300 is covered with a seat cover 310 formed of a material such as cloth or leather. As shown in Fig. 2, the inner side of the seat cover 310 is configured to include a cushion 320, a seat back frame structure SB, and a backrest portion 360.
The internal configuration of the seat back portion 300 will be described in detail below.

<Regarding the Inner Configuration of the Seat Back Part 300>
As shown in FIG. 2, the inside of the seat back portion 300 is configured to include a cushion 320, a seat back frame structure SB, a backrest portion 360, and a movable portion 400 which will be described later.

(Regarding the cushion 320)
The cushion 320 is made of a material such as urethane and is formed so as to cover the vehicle upper side of the seat back portion 300. The cushion 320 is disposed in close contact with the inner side of the seat cover 310 on the vehicle upper side of the seat back portion 300.

(Regarding the seat back frame structure SB)
The seat back frame structure SB constitutes the framework of the seat back portion 300, and includes a side back frame 330, an upper back frame 340, and a lower back frame 350, as shown by the lattice-shaped hatching in FIG.

The side back frames 330 are made of metal or other materials and are formed into a generally long plate shape extending in the vertical direction of the vehicle with the plate thickness direction being the vehicle width direction, and are disposed on both sides of the seat back section 300 in the vehicle width direction. An upper back frame 340 extending in the vehicle width direction is joined to the upper ends of the pair of side back frames 330, and a lower back frame 350 extending in the vehicle width direction is joined to the lower ends of the pair of side back frames 330. The back seat frame 150 of the seat cushion section 100 is rotatably connected to the lower side of the side back frame 330.

The upper back frame 340 is formed of a metal or other member and extends in the vehicle width direction, and is connected to the upper ends of the pair of side back frames 330. A through hole TH is provided on the upper side of the upper back frame 340 in the vehicle vertical direction, into which the stay 21 of the headrest portion 20 is inserted. In addition, an auxiliary wire SW1 that suspends the backrest portion 360 toward the vehicle downward side is connected to both side ends of the upper back frame 340 in the vehicle width direction.

The lower back frame 350 is made of a metal or other material and is formed into a generally long plate shape that extends in the vehicle width direction with the plate thickness direction being in the vertical direction of the vehicle, and is disposed in the vehicle lower portion of the seat back portion 300. The lower back frame 350 is connected to the vehicle lower side of the pair of left and right side back frames 330.

(Regarding the backrest portion 360)
The backrest portion 360 is formed into a flat plate shape by pressing a metal member or the like. The backrest portion 360 is suspended from the upper back frame 340 by an auxiliary wire SW1 on both sides in the vehicle width direction. In addition, on the vehicle lower side, the backrest portion 360 is elastically supported by the side back frames 330 on both sides in the vehicle width direction by an auxiliary wire SW2. The auxiliary wires SW1 and SW2 are formed of a metal having spring properties, and the backrest portion 360 is biased toward the vehicle front side by the auxiliary wires SW1 and SW2. In addition, an engagement portion SL protruding toward the vehicle rear side is provided on the vehicle rear side of the backrest portion 360, and a wire WR included in the movable portion 400 described later is engaged with the engagement portion SL.

<Configuration of Movable Part 400>
4, the movable part 400 is configured to straddle the seat cushion part 100 and the seat back part 300. The movable part 400 is disposed on the inner side of the seat frame structure SH in the vehicle width direction and on the inner side of the seat back frame structure SB in the vehicle width direction, and is configured to include a sitting position correction rail part 410, pulleys PL1 to PL3 (pulleys PL1L to PL3L, PL1R to PL3R), and a wire WR.

(Regarding the seating position correction rail portion 410)
The seating position correction rail portion 410 is fixed to the vehicle width direction inner side of the side seat frame 140 on both sides in the vehicle width direction in the seat cushion portion 100. The seating position correction rail portion 410 is a slide rail formed in a U-shape with an opening on the vehicle width direction inner side. The seating position correction rail portion 410 is formed of a member such as metal and extends in the vehicle front-rear direction. The seating position correction rail portion 410 is engaged with both ends in the vehicle width direction of the posture correction cross member 210 via bearings or the like so as to be movable in the vehicle front-rear direction.

(About pulleys PL1 to PL3)
The pulleys PL1 to PL3 (pulleys PL1L to PL3L, PL1R to PL3R) are formed of metal, hard resin, or the like. The pulleys PL1 to PL3 (pulleys PL1L to PL3L, PL1R to PL3R) are rotatably fixed symmetrically on both sides in the vehicle width direction inside the seat back portion 300. The pulley PL1 (pulleys PL1L, PL1R) is rotatably fixed to the inside of the lower part of the vehicle of the side back frame 330 so that its axial direction faces the vehicle width direction. The pulley PL2 (pulleys PL2L, PL2R) is rotatably fixed to the inside of the approximately central part in the vertical direction of the front part of the vehicle of the side back frame 330 so that its axial direction faces the vehicle width direction. In addition, pulley PL3 (pulleys PL3L, PL3R) is rotatably fixed to the inside of the approximate vertical center of the rear part of the vehicle of the sideback frame 330 so that its axial direction faces in the vertical direction of the vehicle.

(About WireWR)
The wire WR as the connecting part is a member in which a plurality of non-elastic metal wires or the like are twisted together. The wire WR connects the posture correction part 200 of the movable part 400 and the seat back part 300. Specifically, one end of the wire WR is rotatably fixed to the vehicle upper side of the auxiliary rod 210a connected to the posture correction cross member 210. The wire WR passes from the auxiliary rod 210a through pulleys PL1L to PL3L and engages with the engagement part SL of the backrest part 360 provided on the seat back part 300. Then, the other end of the wire WR passes through pulleys PL3R to PL1R and is rotatably fixed to the vehicle upper side of the auxiliary rod 210a connected to the other side of the posture correction cross member 210.

<Action and Effects>
Hereinafter, the operation and effect of the vehicle seat S of this embodiment when the seating posture of the seated occupant P is displaced will be described with reference to FIGS.

(Regarding the seating posture of seated occupant P)
The seated posture of the seated occupant P is displaced by driving operations or the like, such that the position of the back or the position of the knees of the seated occupant P is displaced.
When a seated occupant P is seated in the vehicle seat S, the buttocks of the seated occupant P are placed on the seat cushion portion 100, surrounded by the front seat frame 130, the side seat frame 140, the back seat frame 150, the lower seat frame 160, and the frame wire 170, via the cushion 120. The thighs of the seated occupant P are placed on the vehicle upper side of the front seat frame 130, the posture correcting cross member 210, and the posture correcting member 220, via the cushion 120.
In addition, as shown in Figure 5, the seated posture of the seated occupant P can be represented by an inverted triangle TR, which is the shape of the pelvis of the seated occupant P, and the position of the apex of the inverted triangle TR on the lower side of the vehicle, and the direction of an inclined line IL, which is a line perpendicular to the apex of the inverted triangle TR on the lower side of the vehicle and the side opposite to the apex.
The seated posture of the seated occupant P is stabilized by reducing the movement of the apex of the inverted triangle TR on the vehicle lower side toward the front side and correcting the seated posture so that the inclined line of the inverted triangle TR approaches the inclined line IL before the seated posture of the seated occupant P is displaced.

(When the back of the seated occupant P falls back)
When the seated posture of the seated occupant P changes due to driving operations or the like, and the back of the seated occupant P moves toward the rear of the vehicle, the backrest portion 360 of the seat back portion 300 is pushed toward the rear of the vehicle as shown by the arrow AA in Fig. 6. The seated posture of the seated occupant P tilts toward the rear of the vehicle as shown by the inclined line IL1.
The wire WR engaged with the engagement portion SL provided on the vehicle rear side of the backrest portion 360 moves in the direction of the arrow AB with the movement of the backrest portion 360. The auxiliary rod 210a of the posture correction portion 200 is lifted in the direction of the arrow AC by the wire WR fixed to one end side of the auxiliary rod 210a. The posture correction member 220 rises up toward the vehicle upper side by lifting the auxiliary rod 210a, and the cushion 120 at the vehicle upper part is lifted up toward the vehicle upper side. Since the posture correction member 220 is formed of a flexible member such as cloth or leather, the posture correction member 220 wraps the thighs of both legs of the seated occupant P from both sides according to the shape of the thighs. The thighs of both legs of the seated occupant P are lifted by the posture correction member 220 while stably holding the trunk through the cushion 120 and maintaining the degree of freedom of the seated occupant P.
Then, the inclination line indicating the seated posture of the seated occupant P moves in the direction indicated by the arrow AE, from the inclination line IL1 to the inclination line IL2. This inclination line IL2 is a seated posture corrected in a direction approaching the inclination line IL before the back of the seated occupant P drops backward. In addition, by lifting the thighs of both legs of the seated occupant P toward the upper side of the vehicle, the movement of the position of the apex on the lower side of the vehicle of the inverted triangle TR2 toward the front side of the vehicle is restricted.

(When the knees of the seated occupant P drop)
When the seated occupant P's seated posture changes due to driving operations or the like, and the knees of the seated occupant P drop as shown by arrow BB in Fig. 7, the front seat frame 130 of the seat cushion portion 100 rotates in the direction of arrow BC around the hinge portion HG as a fulcrum, and the front side of the seated occupant P drops downward toward the vehicle. The seated posture of the seated occupant P tilts toward the front side of the vehicle as shown by the inclined line IL3.
The posture correction rod portion 230 fixed to the lower side of the front part of the front seat frame 130 pushes the posture correction cross member 210 connected to the rear side of the front seat frame 130 toward the rear side of the vehicle as the front part of the front seat frame 130 moves downward toward the vehicle lower side. The posture correction cross member 210 moves toward the lower side of the thighs of the seated occupant P along the seating position correction rail portion 410 in the direction indicated by the arrow BD. Furthermore, the auxiliary rod 210a connected to the posture correction cross member 210 is lifted in the direction indicated by the arrow BE by the urging force toward the seat back portion 300 generated in the wire WR fixed to one end side of the auxiliary rod 210a. The posture correction member 220 rises up toward the upper side of the vehicle as the auxiliary rod 210a is lifted, and the cushion 120 at the upper part of the vehicle is lifted toward the upper side of the vehicle. Then, the thighs of both legs of the seated occupant P are lifted toward the direction indicated by the arrow BE through the cushion 120 so as to be wrapped in the posture correction member 220.
Then, the inclination line indicating the seated posture of the seated occupant P moves in the direction indicated by the arrow BF, from the inclination line IL3 to the inclination line IL4. This inclination line IL4 is a seated posture corrected in a direction approaching the inclination line IL before the knees of the seated occupant P lower. In addition, by lifting the thighs of both legs of the seated occupant P toward the upper side of the vehicle, the movement of the position of the apex on the lower side of the vehicle of the inverted triangle TR4 toward the front side of the vehicle is restricted.

As described above, the vehicle seat S of this embodiment is provided with a seat cushion section 100 that supports the buttocks to thighs of a seated occupant P and has a seat frame structure SH inside as a skeleton, and a seat back section 300 that supports the back of the seated occupant P, and is equipped with a posture correction section 200 that is configured inside the seat frame structure SH and corrects the seating posture of the seated occupant P, and a movable section 400 that allows the posture correction section 200 to move in response to pressure input from the seated occupant P to the seat cushion section 100 or the seat back section 300, and the posture correction section 200 is engaged with the movable section 400 so as to be movable in the fore-and-aft direction of the vehicle, the posture correction section 200 and the seat back section 300 are connected by the movable section 400, and the posture correction section 200 is biased in a direction toward the seat back section 300.
That is, the posture correction unit 200 is disposed on the vehicle lower portion of the cushion 120 and on the vehicle upper side of the frame wire 170, and is disposed inside the seat frame structure SH surrounded by the front seat frame 130, the side seat frame 140, and the back seat frame 150. When the seated occupant P sits in the vehicle seat S, the buttocks of the seated occupant P are placed on the inside of the seat frame structure SH via the cushion 120. The thighs of the seated occupant P are placed on the vehicle upper side of the posture correction unit 200.
When the seated occupant P's seated posture is displaced and pressure is input from the seated occupant P to the seat cushion unit 100 or the seat back unit 300, the posture correction unit 200 is moved toward the rear side of the vehicle by the movable unit 400, and the posture correction unit 200 rises toward the upper side of the vehicle due to the biasing force toward the seat back unit 300, and lifts the cushion 120 disposed on the vehicle upper side of the posture correction unit 200 toward the vehicle upper side. The thighs of both feet of the seated occupant P placed on the vehicle upper side of the posture correction unit 200 are lifted toward the vehicle upper side by the posture correction unit 200. Therefore, the posture correction unit 200 can stabilize the seated posture of the seated occupant P by lifting the thighs of both feet of the seated occupant P toward the vehicle upper side and correcting the seated posture of the seated occupant P to approach the inclination line IL before the seated posture of the seated occupant P was displaced. Furthermore, the posture correction unit 200 can reliably restrict the position of the apex of the inverted triangle TR on the lower side of the vehicle from moving toward the front side of the vehicle.
Therefore, the vehicle seat S can correct the seating posture of the seated occupant P in accordance with the movement of the seated occupant P.

In addition, in the vehicle seat S according to this embodiment, the posture correction section 200 has auxiliary bars 210a connected to both ends in the vehicle width direction so as to form a U-shape, and includes a posture correction cross member 210 provided on the inside vehicle lower side of the seat cushion section 100 so as to extend in the vehicle width direction, a posture correction member 220 fixed to the posture correction cross member 210 so as to extend in the vehicle width direction, and a posture correction member 220 having a rear end rotatably engaged with the posture correction cross member 210 with the vehicle width direction as an axis and a front end rotatably fixed to the seat frame structure SH with the vehicle width direction as an axis. The movable part 400 is arranged inside the seat frame structure SH and is composed of a seating position correction rail part 410 that engages the posture correction cross member 210 so that it can move in the fore-and-aft direction of the vehicle, and a wire WR as a connecting part that connects the posture correction part 200 and the seat back part 300 so that they can be linked together, and both side ends of the posture correction cross member 210 in the vehicle width direction are engaged with the seating position correction rail part 410, and the wire WR is rotatably fixed to one end of the auxiliary rod 210a and is biased toward the seat back part 300.
That is, when the seated posture of the seated occupant P is displaced, pressure is applied to the seat back portion 300, and the backrest portion 360 of the seat back portion 300 moves toward the rear of the vehicle, the posture correction member 220 fixed to the posture correction cross member 210 rises toward the vehicle upper side by the wire WR engaged with the backrest portion 360, and lifts the cushion 120 toward the vehicle upper side. Then, the thighs of both legs of the seated occupant P are lifted toward the vehicle upper side by the posture correction member 220 via the cushion 120, so that the vehicle seat S can be made to have a seated posture corrected in a direction approaching the inclination line IL before the back of the seated occupant P drops backward. Also, the vehicle seat S can restrict the position of the apex of the inverted triangle TR on the vehicle lower side from moving toward the vehicle front side by lifting the thighs of both legs of the seated occupant P toward the vehicle upper side.
In addition, when the seated occupant P's seated posture is displaced, the knees of the seated occupant P drop, and pressure is applied to the front seat frame 130 in the seat cushion portion 100, the vehicle front portion of the front seat frame 130 drops toward the vehicle lower side. The posture correction cross member 210 is pushed toward the vehicle rear side by the posture correction rod portion 230, the posture correction cross member 210 moves along the seating position correction rail portion 410, and the cushion 120 is lifted toward the vehicle upper side by the posture correction member 220. Then, the thighs of both legs of the seated occupant P are lifted toward the vehicle upper side by the posture correction member 220 via the cushion 120, so that the vehicle seat S can be made to have a seated posture corrected in a direction approaching the inclination line IL before the knees of the seated occupant P dropped. In addition, the vehicle seat S can restrict the position of the apex of the inverted triangle TR on the vehicle lower side from moving toward the vehicle front side by lifting the thighs of both legs of the seated occupant P toward the vehicle upper side.
Therefore, the vehicle seat S can correct the seating posture of the seated occupant P in accordance with the movement of the seated occupant P.

In addition, in the vehicle seat S of this embodiment, the posture correction member 220 is formed in an approximately rectangular shape made of woven or nonwoven fabric with the vehicle width direction as its long dimension, and the vehicle lower side edge of the posture correction member 220 is fixed to the posture correction cross member 210, and both side edges in the vehicle width direction of the posture correction member 220 are fixed to the auxiliary bar 210a.
That is, a posture correction member 220 made of a flexible material such as a woven or nonwoven fabric is fixed to a posture correction cross member 210 for correcting the seated posture of the seated occupant P. The posture correction member 220 softly wraps around both sides of the thighs of the seated occupant P in accordance with the shape of the thighs, thereby stably holding the trunk and lifting the thighs of the seated occupant P while maintaining the freedom of movement of the seated occupant P.
Therefore, the vehicle seat S can correct the seating posture of the seated occupant P in accordance with the movement of the seated occupant P.

In the embodiment of the present invention, the movable part 400 is configured to move the posture correction member 220 by the wire WR to correct the seated occupant's seated posture. However, the seated occupant's seated posture may be corrected by providing sensors in the front seat frame 130 and the backrest part 360 to detect the stress input due to the seated occupant's seated posture and adjusting the air pressure of the air cushions provided in the seat cushion part 100 and the seat back part 300.

The above describes an embodiment of the present invention in detail with reference to the drawings, but the specific configuration is not limited to this embodiment and includes designs that do not deviate from the gist of the present invention.

10; slide rail portion 20; headrest portion 100; seat cushion portion 120; cushion 130; front seat frame 140; side seat frame 200; posture correction portion 210; posture correction cross member 210a; auxiliary rod 220; posture correction member 230; posture correction rod portion 300; seat back portion 360; backrest portion 400; movable portion 410; seating position correction rail IL1; inclination line IL2; inclination line IL3; inclination line IL4; inclination line PL1; pulley PL2; pulley PL3; pulley S; vehicle seat V; vehicle WR; wire

Claims (3)

A vehicle seat including a seat cushion portion that supports the buttocks to the thighs of a seated occupant and has a seat frame structure as a skeleton therein, and a seat back portion that supports the back of the seated occupant,
a posture correction unit that is configured inside the seat frame structure and that corrects the seating posture of the seated occupant;
a movable portion that allows the posture correction portion to move in response to a pressure input from the seated occupant to the seat cushion portion or the seat back portion;
Equipped with
The posture correction unit is engaged with the movable unit so as to be movable in the front-rear direction of the vehicle,
A vehicle seat, characterized in that the posture correction portion and the seat back portion are connected by the movable portion, and the posture correction portion is biased in a direction toward the seat back portion. The posture correction unit includes:
A posture correction cross member is provided on the inside of the seat cushion portion and extends in the vehicle width direction on the vehicle lower side, and an auxiliary bar is connected to both ends of the vehicle width direction to form a U-shape;
A posture correction member extending in a vehicle width direction and fixed to the posture correction cross member;
a posture correction rod portion having a vehicle rear end rotatably engaged with the posture correction cross member with the vehicle width direction as an axis and a vehicle front end rotatably fixed to the seat frame structure with the vehicle width direction as an axis;
The present invention relates to a method for manufacturing a computer-implemented ...
The movable part is
A seating position correction rail portion that is disposed inside the seat frame structure and engages the posture correction cross member so as to be movable in the vehicle front-rear direction;
A connection portion that connects the posture correction portion and the seat back portion in a linkable manner;
The present invention relates to a method for manufacturing a computer-implemented ...
The vehicle seat according to claim 1, characterized in that both side ends in the vehicle width direction of the posture correction cross member are engaged with the seating position correction rail portion, and one end of the auxiliary rod is rotatably fixed to the connection portion and is biased toward the seat back portion. The posture correction member is formed in an approximately rectangular shape with the vehicle width direction as its long direction and made of woven or nonwoven fabric, and the vehicle lower side edge of the posture correction member is fixed to the posture correction cross member, and both side edges of the posture correction member in the vehicle width direction are fixed to the auxiliary bar.