JP6735130B2 - Vehicle seat - Google Patents

Description

INDUSTRIAL APPLICABILITY The present invention is a vehicle seat installed on various vehicles such as free-running vehicles such as buses, railway vehicles such as railroad vehicles, ships, and aircraft, and more specifically, falls back from the time when the backrest is most upright. As described above, the vehicle seat is tilted (referred to as "backrest reclining" in the present application), and further, in conjunction with the backrest reclining, the seat is tilted so that the rear part thereof is depressed downward (referred to as "seat tilt" in the present application). The present invention relates to a vehicle seat in which the seat may move forward together with the backrest in conjunction with backrest reclining and seat tilt (referred to as "seat backrest slide" in the present application).

Various vehicle seats having backrest reclining and seat tilt have been developed. If the backrest recline only, the opening angle between the backrest and the seat increases during reclining, but if the seat tilts as well, the increase in the opening angle is alleviated, and the change in sitting comfort decreases and the body It is hard to slip forward, which reduces fatigue.

Further, various vehicle seats having a backrest reclining and a seatback slide have been developed. If only backrest reclining, the distance between the upper part of the backrest and the rear seat becomes smaller when reclining, but if the seatback is slid, the distance can be increased, so that the seated person in the rear seat feels a sense of pressure. Can be reduced. This is particularly useful when the reclining angle is large.

In addition, Patent Documents 1 to 3 describe vehicle seats that combine backrest reclining, seat tilt, and seatback slide.

Japanese Patent No. 3336454 Japanese Patent No. 5341991 Japanese Patent No. 5337719

However, even the vehicle seats of Patent Documents 1 to 3 have the following problems.
-During reclining on the back, the hip point, which is the center of rotation of the torso and thighs of the seated person, moved up or down, which could cause discomfort or change in sitting comfort.
-Although the backrest reclining and the seat tilt can alleviate the increase in the opening angle, the clothes (upper part of the shirt or dress) worn on the upper half of the body may be pulled upward by the reclining backrest.
・Some actuators required a plurality of actuators in order to combine backrest reclining, seat tilt, and seatback slide.

Therefore, an object of the present invention is to prevent the hip point of a seated person from moving upward or downward during reclining of the backrest so that the user does not feel uncomfortable or change the sitting comfort.
A further object of the present invention is to prevent the clothes worn on the upper body (the upper part of the shirt or dress) from being pulled upward by the reclining backrest.
It is a further object of the present invention to realize backrest reclining, seat tilt and seatback slide with one actuator.

The present invention adopts the following means (1) to (3) as a result of intensive studies focusing on the hip point of the seated person.

(1) In the vehicle seat of the present invention, a side frame that does not move forward and backward with respect to the seat frame is arranged laterally of the seat frame of the seat,
A backrest arm extending forward is provided on the backrest frame of the backrest,
The front end of the backrest arm is rotatably attached to the side frame by the reclining center axis (A) for the backrest reclining.
The reclining center axis (A) is arranged within a circle with a radius of 30 mm centered on the hip point when the backrest is upright when viewed from the side,
The backrest frame lower end shaft (F) provided at the lower end portion of the backrest frame is pulled forward to recline the backrest frame.
A support frame including a side frame and a lower frame arranged below the seat frame is slidably engaged in the front and rear with respect to the base,
A rotation shaft (R) rotatably attached to the base, and an input arm fixed to the rotation shaft (R) and protruding downward, and coupled to a rod that advances and retracts the actuator. A reclining output arm fixed to the rotary shaft (R) and protruding upward and provided with a first elongated hole, and a reclining output arm fixed to the rotary shaft (R) and projected upward and provided with a second elongated hole. output arm assembly comprising a slide output arm is provided,
A reclining connecting lever for connecting the reclining output arm and the backrest arm is provided,
The reclining transmission shaft (B) at the front end of the reclining connecting lever is slidably and rotatably engaged with the first elongated hole of the reclining output arm, and the rear end of the reclining connecting lever is at the back. This frame is rotatably attached by the bottom shaft (F),
The slide force shaft (G) provided on the support frame for sliding the seat back and back is slidably and rotatably engaged with the second elongated hole of the slide output arm,
Therefore, the backrest slide is interlocked with the backrest reclining and the seat tilt.
Here, the hip points when the backrest is upright are the torso and thigh of the torso measured with the three-dimensional mannequin seated on the seat in accordance with JIS D0024-1985 "How to determine the H point in an automobile". The center of rotation. It is located in the center between the aiming points on either side of the three-dimensional mannequin.

[Action]
According to the present invention, the hip point of the seated person is hardly moved up or down during the reclining of the backrest.
The reclining center axis (A) is most preferably located at the hip point when the backrest is upright when viewed from the side, but within a circle with a radius of 30 mm (more preferably 20 mm) centered on the hip point. If it is arranged in the range, the action is almost similar to that in the case where it is arranged at the same hip point.

(2) Further, an intermediate portion in the front-rear direction of the seat frame is pivotally attached to the side frame by the tilt center shaft (C) for seat tilt.
A tilt connecting lever for connecting the backrest arm and the seat frame is provided, and an upper end portion of the tilt connecting lever is pivotally attached to an intermediate portion of the backrest arm in the front-rear direction by an intermediate shaft (D). The lower end of the tilt connecting lever is rotatably attached to the rear end of the seat frame by the seat frame rear end shaft (E).
Therefore, it is preferable that the seat tilt be interlocked with the backrest reclining.

[Action]
Since the backrest arm descends greatly toward the rear, the tilt connecting lever connected to the intermediate shaft (D) in the front-rear direction intermediate portion of the backrest arm moves the seat frame rear end shaft (E) to the backrest frame lower end shaft ( It is lowered smaller than the amount of fall of F) (seat tilt). Therefore, the greater the reclining angle of the backrest (the amount of change from the upright time), the closer the distance between the backrest frame lower end axis (F) and the seat frame rear end axis (E) becomes when viewed from the side.
The actuator acts on the input arm to rotate the input/output arm assembly.
The slide output arm advances the support frame by the slide transmission shaft (G) through the slide connecting portion, and the advancing support frame advances the seat frame by the tilt center axis (C) of the support portion. The reclining center axis (A) of the side frame advances the backrest frame via the backrest arm (seat backrest slide).
The reclining output arm advances the back support frame lower end shaft (F) via the reclining power transmission shaft (B) and the reclining connection lever. By the forward movement of the lower end frame (F) of the backrest frame, the backrest frame reclines about the reclining center axis (A), and the seat tilt interlocks with this as described above.

According to the first aspect of the present invention, the hip point of the seated person is hardly moved up or down during the reclining of the backrest so that the user does not feel uncomfortable and the sitting comfort does not change. Further, the backrest reclining, the seat tilt, and the seat backrest slide can be realized by one actuator.
Further, according to the inventions of claims 2 to 5, it is possible to prevent the clothes (the upper part of the shirt or the one piece) worn on the upper body from being pulled upward by the reclining backrest.

It is a perspective view of the vehicle seat of an example which removed a seat member and a backrest member. It is a disassembled perspective view of the support frame of a passenger seat, and an input/output arm assembly. FIG. 3 is a side view of the vehicle seat with the backrest in an upright state. FIG. 3 is a side view of the vehicle seat with the backrest in an intermediate reclining state. FIG. 3 is a side view of the vehicle seat with the backrest fully reclined. It is a figure which shows the movement of each axis|shaft in the state change of FIGS. It is the figure which canceled and re-expressed only a seat back slide from FIG. It is a graph which shows the relationship between the reclining angle of a backrest and the amount of slide of a seat backrest. 6 is a graph showing the relationship between the reclining angle of the backrest and the distance between the backrest lower end F and the seat frame rear end axis E.

In the above means (1), the form of the side frame is not particularly limited, but a plate shape, a column shape, an angle member, etc. can be exemplified. The back support frame lower end shaft (F) may be provided below the base end of the back support arm, or may be provided in a back support frame different from the back support arm.

In the above means (2), the following preferred embodiments can be exemplified.
The front and rear positions of the tilt center axis (C) are preferably arranged in the range of 20 mm to 100 mm (more preferably 40 mm to 80 mm) forward of the front and rear positions of the reclining center axis (A).
The intermediate axis (D) is preferably in the range of the central portion obtained by dividing the distance between the reclining center axis (A) and the backrest frame lower end axis (F) into three equal parts.
-The larger the reclining angle of the backrest is, the closer the distance between the backrest frame lower end axis (F) and the seat frame rear end axis (E) is, as viewed from the side.

In the above means (3), the following preferred embodiments can be exemplified.
-The reclining center axis (A), the tilt center axis (C), and the slide transmission axis (G) move back and forth together with the support frame by the seat back/back slide in side view, but preferably do not move up and down.
The front and rear positions of the reclining transmission shaft (B) are preferably arranged in a range of 20 mm forward and 20 mm rearward with respect to the front and rear positions of the reclining center axis (A) when viewed from the side.
The distance between the reclining power transmission axis (B) and the backrest frame lower end axis (F) is 10 mm shorter to 40 mm longer than the distance between the reclining center axis (A) and the backrest frame lower end axis (F). It is preferably in the range of.

When viewed from the side, the slide transmission shaft (G) and the rotation shaft (R) are larger than the distance between the rotation shaft (R) and the input shaft (T) that pivotally mounts the input arm to the rod. It is preferable that the distance of () is longer.
The reclining transmission shaft (B) and the rotation shaft (R) are more than the distance between the rotation shaft (R) and the input shaft (T) that pivotally mounts the input arm to the rod in a side view. ) Is preferably longer.

In a side view, it is preferable that the distance between the reclining transmission shaft (B) and the rotation shaft (R) is longer than the distance between the slide transmission shaft (G) and the rotation shaft (R).

The vehicle seat of the embodiment shown in FIGS. 1 to 4 has a basic configuration including a base 1, a support frame 6, a backrest 15, a seat 22, an actuator 26, an interlocking mechanism 30, and a damper device 40.

The base 1 includes legs 2, an underframe 3 fixed onto the legs 2, and a pair of left and right rails 4 mounted on the underframe 3 and extending in the front-rear direction. The base 1 is fixed to the floor of the vehicle by the legs 2 and does not move back and forth or up and down.

The support frame 6 includes a pair of left and right sliders 7 engaged with the rails 4 so as to be movable back and forth (due to a seat back and back slide) and vertically immovable, and a plane supported by a plurality of columns 8 on both sliders 7. The lower frame 9 having a rectangular shape, a pair of left and right side frames 10 standing upright on the left and right sides of the lower frame 9, and a pair of left and right sliding connection parts protruding rearward on the front side of the lower frame 9. 11 and a pair of left and right support parts 12 provided upright on each slide connection part 11. The lower frame 9 is below the seat, and the side frames 10 are on both left and right sides of the seat. The support frame 6 can move back and forth together, but cannot move up and down.

The backrest 15 includes a backrest frame 16 and a backrest surface member 20 attached to the backrest frame 16.
The back support frame 16 is a substantially rectangular frame when viewed from the front, and the hip points HP when the back support 15 is upright in a side view from the lower end portions of the left and right sides thereof to the front (the definition is as described above). It is provided with a pair of backrest arms 17 extending slightly beyond. The front end portion of the backrest arm 17 is rotatable with respect to each side frame 10 of the support frame 6 by a reclining center axis A located at the hip point HP in side view (for backrest reclining). It is worn. Further, a pin 18 provided on the rear portion of the backrest arm 17 and protruding laterally is engaged with a slit 19 formed in an arc shape around the reclining center axis A in each side frame 10 of the support frame 6. Therefore, the backrest is moved in the slit 19 when reclining.
The backrest member 20 has its front surface forming a backrest surface (the surface on which the seated person's back rests), and in order to have flexibility, one of a topsheet, a cushion, a spring, a tension film, etc. Alternatively, two or more are used.

The seat 22 includes a seat frame 23 and a seat surface member 24 attached to the seat frame 23.
The seat frame 23 is a quadrangular frame in a plan view, and the front-rear direction intermediate portions of the left and right sides thereof are rotated by the tilt central axis C with respect to the support portions 12 of the support frame 6 (for seat tilt). It is movably pivoted.
The seating surface member 24 has a top surface that forms a seating surface (a surface on which the seated person's hips come into contact), and is one of a surface sheet, a cushion, a spring, a tension film, or the like in order to have flexibility. Alternatively, it is configured by using two or more.

The actuator 26 is provided with a main body 27 with a built-in electric motor, which is attached to the rear portion of the leg 2 of the base 1 at the support shaft S, and a rod 28 which can be moved forward and backward from the front end of the main body 27 by the electric motor.

The interlocking mechanism 30 is for interlocking the backrest reclining, the seat tilt, and the seatback slide. The interlocking mechanism 30 has a basic configuration including the backrest arm 17, an input/output arm assembly 31, a reclining connecting lever 37, and a tilt connecting lever 38.

The input/output arm assembly 31 is a combination of a rotating shaft R, an input arm 32, a reclining output arm 33, and a sliding output arm 35, and rotates together.
The rotation axis R extends in the left-right direction below the underframe 3 of the base 1, and is rotatably attached to the lower front portion of the underframe 3.
The input arm 32 is fixed to the center of the rotation shaft R and protrudes downward, and is rotatably attached to the tip of the rod 28 of the actuator 26 by the input shaft T. ..
The reclining output arm 33 is a pair that is fixed to the left and right ends of the rotary shaft R and projects upward. A first elongated hole 34 extending vertically is formed in each reclining output arm 33. The relationship between the first elongated hole 34 and the reclining connecting lever 37 will be described later.
The slide output arm 35 is a pair of members that are fixed between the central portion of the rotary shaft R and the left and right end portions and project upward. A second elongated hole 36 extending in the vertical direction is formed in each slide output arm 35. The slide transmission shaft G provided on each slide connecting portion 11 of the support frame 6 is slidably and rotatably engaged with each second elongated hole 36.

The reclining coupling levers 37 are a pair of coupling the reclining output arms 33 and the backrest arms 17. The reclining transmission shaft B provided at the front end of each reclining coupling lever 37 is slidably and rotatably engaged with the first elongated hole 34 of each reclining output arm 33. The rear end of each reclining coupling lever 37 is pivotally attached to the lower end of the backrest frame 16 by a backrest frame lower end shaft F.

The tilt connecting levers 38 are a pair of connecting the backrest arms 17 and the left and right sides of the seat frame 23. The upper end of each tilt connecting lever 38 is pivotally attached by an intermediate shaft D to the front-rear direction intermediate part of each backrest arm 17 (between the reclining center axis A and the backrest frame lower end axis F). Has been done. The lower end of each tilt connecting lever 38 is pivotally attached to the rear end of the right and left sides of the seat frame 23 by a seat frame rear end shaft E.

The damper device 40 is for always urging the backrest frame 16 in a direction to return from the reclining to the upright, and is provided at an intermediate height between the gas damper 41 and the backrest frame 16 so that the gas damper 41 can be installed. It is composed of an upper bracket 42 that pivotally attaches the sleeve side, and a lower bracket 43 that is provided at the rear portion of the lower frame 9 of the support frame 6 and pivotally attaches the rod side of the gas damper 41.

A supplementary explanation will be given for each of the above axes.
As described above, the reclining center axis A is arranged at the hip point HP when the backrest is upright in a side view as described above, but in the vicinity of the hip point HP, specifically, a radius around the hip point HP. It may be arranged in an area within a circle of 30 mm (the circle H is indicated by a thick line in FIG. 3).
The front-rear position of the reclining transmission axis B is close to the front-rear position of the reclining center axis A when viewed from the side when upright. Specifically, the front-rear position of the reclining center axis A is 20 mm forward and 20 mm rearward. It is preferably arranged in a range (6 mm forward in the illustrated example).
The distance between the reclining transmission axis B and the backrest frame lower end axis F is close to the distance between the reclining center axis A and the backrest frame lower end axis F. Specifically, the reclining center axis A and the backrest frame lower end axis F. It is preferable that the distance is 10 mm shorter to 40 mm longer than the distance (16 mm longer in the illustrated example). This is because the reclining angle (the amount of change with respect to upright) can be made large by preventing the lower end axis F of the backrest frame from becoming too low.

The front-rear position of the tilt center axis C is preferably arranged in the range of 20 mm to 100 mm forward with respect to the front-rear position of the reclining center axis A (in the illustrated example, the position is 58 mm forward). This is because it is possible to prevent the hip point of the seated person from moving up or down during the reclining of the backrest due to the positional relationship with the backrest that reclines about the reclining center axis A described later.
The intermediate shaft D is located in the front-rear direction intermediate portion of the backrest arm 17 (in the range of the central portion obtained by dividing the distance between the reclining center axis A and the backrest frame lower end axis F into three equal parts. This is because when the axis E is lowered by a smaller amount than the lower end axis F of the backrest frame, the ratio becomes appropriate.

In a side view, the distance between the slide transmission shaft G and the rotating shaft R is longer than the distance between the input shaft T and the rotating shaft R.
In a side view, the distance between the reclining transmission shaft B and the rotating shaft R is longer than the distance between the input shaft T and the rotating shaft R.
In a side view, the distance between the reclining transmission shaft B and the rotation shaft R is longer than the distance between the slide transmission shaft G and the rotation shaft R.
The support shaft S and the rotation shaft R do not always move back and forth or up and down.
The reclining center axis A, the tilt center axis C, and the slide force axis G move back and forth together with the support frame 6, but they do not move up and down.
The reclining power transmission axis B moves back and forth more than the slide power transmission axis G, but does not move up and down.

The operation and effect of the vehicle seat configured as described above will be described.
-FIG. 3 shows the vehicle seat in a state in which the backrest is most raised (upright: the reclining angle is 0 degree) and neither the seat tilt nor the seatback slide is performed. At this time, the rod 28 of the actuator 26 is most advanced (most extended from the main body 27).
FIG. 4 shows the vehicle seat in a state in which the backrest reclines intermediately (intermediate position: the reclining angle is, for example, 12 degrees), the seat tilts in the middle, and the seatback is slid in the middle. At this time, the rod 28 of the actuator 26 is at the intermediate position of forward and backward movement.
FIG. 5 shows the vehicle seat in a state in which the backrest reclines to the maximum (full reclining: the reclining angle is, for example, 25 degrees), the seat tilts to the maximum, and the seatback to the maximum slides. At this time, the rod 28 of the actuator 26 is most retracted (most retracted to the main body 27).
As shown in these changes in FIG. 3→FIG. 4→FIG. 5, when the actuator 26 is operated to retract the rod 28, the input arm 32 moves backward, the reclining output arm 33 and the sliding output. The arm 35 rotates forward together with the rotation axis R.

The slide output arm 35 that rotates forward moves the support frame 6 forward through the slide coupling portion 11 by the slide transmission shaft G, and the forward support frame 6 is seated by the tilt center axis C of the support portion 12. The frame 23 is advanced, and the backrest frame 16 is advanced by the reclining center axis A of the side frame 10 via the backrest arm 17 (seat backrest slide). At this time, as shown in FIG. 6, since the distance between the reclining transmission shaft B and the rotating shaft R is longer than the distance between the input shaft T and the rotating shaft R, the receding amount of the rod 28 is smaller than that of the seat. A large amount of backrest slide can be taken. FIG. 8 is a graph showing the relationship between the reclining angle of the backrest and the amount of slide of the backrest, which is a graph of FIG. 6.

The reclining output arm 33 that rotates forward moves the back support frame lower end shaft F forward via the reclining transmission shaft B and the reclining connection lever 37. At this time, the distance between the reclining transmission shaft B and the rotation shaft R is longer than the distance between the input shaft T and the rotation shaft R, and further longer than the distance between the slide transmission shaft G and the rotation shaft R. Therefore, the amount of forward movement of the back support frame lower end shaft F can be made larger than the amount of backward movement of the rod 28. By the forward movement of the lower end axis F of the backrest frame, the backrest frame 16 reclines about the reclining center axis A arranged at or near the hip point HP. As a result, as shown in FIGS. 3 to 5, the hip point of the seated person is hardly moved up or down during the reclining of the backrest so that the user does not feel uncomfortable or change the sitting comfort. ..

At this time, the backrest arm 17 further descends toward the rear portion, so that the tilt connecting lever 38 connected to the intermediate shaft D in the front-rear direction intermediate portion of the backrest arm 17 moves the seat frame rear end shaft E to the backrest frame. The lower end shaft F is lowered by a smaller amount than the lowering amount (seat tilt). Therefore, as shown in FIG. 7 and FIG. 9 in which the same figure is graphed, as the reclining angle of the backrest increases, the distance between the backrest frame lower end axis F and the seat frame rear end axis E becomes closer in a side view. .. As a result, it is possible to prevent the clothes (upper part of the shirt or dress) worn on the upper body from being pulled upward by the reclining backrest.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be embodied with appropriate changes without departing from the spirit of the invention.

1 Base 2 Legs 3 Base Frame 4 Rail 6 Support Frame 7 Slider 8 Pillar 9 Lower Frame 10 Side Frame 11 Sliding Connection Part 12 Support Part 15 Backrest 16 Backrest Frame 17 Backrest Arm 18 Pin 19 Slit 20 Backrest Member 22 seat 23 seat frame 24 seat surface member 26 actuator 27 body 28 rod 30 interlocking mechanism 31 input/output arm assembly 32 input arm 33 reclining output arm 34 first long hole 35 slide output arm 36 second long hole 37 reclining connection Lever 38 Tilt connecting lever A Reclining center axis B Reclining power axis C Tilt center axis D Intermediate axis E Seat frame rear end axis F Backrest frame lower end axis G Slide power axis H Circle HP Hip point R Rotation axis S support Axis T Input axis

Claims (11)

A side frame that does not move back and forth with respect to the seat frame is arranged on the side of the seat frame of the seat,
A backrest arm extending forward is provided on the backrest frame of the backrest,
The front end of the backrest arm is rotatably attached to the side frame by the reclining center axis (A) for the backrest reclining.
The reclining center axis (A) is arranged within a circle with a radius of 30 mm centered on the hip point when the backrest is upright when viewed from the side,
The backrest frame lower end shaft (F) provided at the lower end portion of the backrest frame is pulled forward to recline the backrest frame.
A support frame including a side frame and a lower frame arranged below the seat frame is engaged with the base so as to be slidable back and forth,
A rotation shaft (R) rotatably attached to the base, and an input arm fixed to the rotation shaft (R) and protruding downward, and coupled to a rod that advances and retracts the actuator. A reclining output arm fixed to the rotary shaft (R) and projecting upward and provided with a first elongated hole, and a reclining output arm fixed to the rotary shaft (R) projecting upward and provided with a second elongated hole. output arm assembly comprising a slide output arm is provided,
A reclining connection lever that connects the reclining output arm and the backrest arm is provided,
The reclining transmission shaft (B) at the front end of the reclining connecting lever is slidably and rotatably engaged with the first elongated hole of the reclining output arm, and the rear end of the reclining connecting lever is at the back. The lower end shaft (F) of the frame is pivotally mounted,
A slide transmission shaft (G) provided on the support frame for sliding the seat back and back is slidably and rotatably engaged with the second elongated hole of the output arm for sliding,
A vehicle seat characterized in that a seat back slide is interlocked with back seat reclining and seat tilt. An intermediate portion of the seat frame in the front-rear direction is rotatably attached to the side frame by a tilt center shaft (C) for seat tilt.
A tilt connecting lever for connecting the backrest arm and the seat frame is provided, and an upper end portion of the tilt connecting lever is pivotally attached to an intermediate portion of the backrest arm in the front-rear direction by an intermediate shaft (D). The lower end of the tilt connecting lever is rotatably attached to the rear end of the seat frame by the seat frame rear end shaft (E).
The vehicle seat according to claim 1, wherein the seat tilt is interlocked with the backrest reclining. The vehicle seat according to claim 2, wherein the front and rear positions of the tilt central axis (C) are arranged in a range of 20 mm to 100 mm forward with respect to the front and rear positions of the reclining central axis (A). The vehicle seat according to claim 2 or 3, wherein the intermediate shaft (D) is in the range of a central portion obtained by dividing the distance between the reclining center shaft (A) and the backrest frame lower end shaft (F) into three equal parts. The vehicle seat according to claim 2, 3 or 4, wherein the larger the reclining angle of the backrest is, the closer the distance between the backrest frame lower end axis (F) and the seat frame rear end axis (E) is in the side view. Reclining center axis (A) and the tilt central axis (C) and slide Den force axis (G) is a side view, but moves back and forth together with the support frame by Zase those slides claim 1 does not move up and down 5 The vehicle seat according to any one of 1. Longitudinal position of the reclining Den force axis (B) is a side view when upright, claim is arranged in the range of 20mm back from 20mm Previous respect to the longitudinal position of the reclining center axis (A). 1 to 6 The vehicle seat according to any one of 1. The distance between the reclining power transmission axis (B) and the backrest frame lower end axis (F) is 10 mm shorter to 40 mm longer than the distance between the reclining center axis (A) and the backrest frame lower end axis (F). The vehicle seat according to any one of claims 1 to 8 , which is a range. In a side view, the slide force transmission shaft (G) and the rotation shaft (R) are larger than the distance between the rotation shaft (R) and the input shaft (T) that pivotally mounts the input arm to the rod. The vehicle seat according to any one of claims 1 to 9 , wherein the distance is longer. In a side view, the reclining transmission shaft (B) and the rotation shaft (R) are larger than the distance between the rotation shaft (R) and the input shaft (T) pivotally mounting the input arm. The vehicle seat according to any one of claims 1 to 9 , wherein a distance from the vehicle seat is longer. In side view, the slide Den force axis (G) and rotation axis than the distance between the (R), reclining Den force axis (B) and towards the distance of the rotation axis (R) is longer claim 10, wherein Vehicle seats.

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