JP2019089401A - Adjustment method of vehicle seat and vehicle seat device - Google Patents

Abstract

To provide an adjustment method of a vehicle seat capable of reducing a change in a support position of a back of an occupant in reclining.SOLUTION: When an inclination angle of a backrest that supports a back of an occupant seating on a seat cushion is adjusted, the backrest rotates below a reference rotation center of the occupant in reclining and around the rotation center defined as front of the end of the seat cushion side of the backrest.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method of adjusting a vehicle seat and a vehicle seat device.

  Patent Document 1 discloses a reclining seat provided with a reclining lock mechanism which keeps the seat back in a sitting posture and which tilts forward to the seat cushion side and a tip-up lock mechanism which bounces the seat cushion up to the seat back side. Do.

International Publication 2007/077978

  However, the technology described in Patent Document 1 does not take into consideration any change in the support position of the back of the occupant during reclining.

  An object of the present invention is to provide a method of adjusting a vehicle seat and a vehicle seat device capable of reducing a change in support position of a passenger's back at the time of reclining.

  In the method of adjusting a vehicle seat according to one aspect of the present invention, when adjusting the inclination angle of the backrest supporting the back of the occupant seated on the seat cushion, the adjustment is performed below the reference rotation center of the occupant at the time of reclining. It is characterized in that the backrest rotates around a rotation center defined in front of an end on the seat cushion side of the backrest.

  According to the present invention, it is possible to provide a method of adjusting a vehicle seat and a vehicle seat device capable of reducing a change in support position of a passenger's back at the time of reclining.

It is a block diagram explaining the composition of the vehicular seat device concerning a 1st embodiment with the side view of a reclining seat. It is a side view of a reclining seat at the time of turning back a seat back. It is a schematic diagram for demonstrating the position of the rotation center of a backrest. It is a flowchart explaining an example of the adjustment method of the vehicular seat concerning a 1st embodiment. It is a block diagram explaining the composition of the vehicular seat device concerning a 2nd embodiment with the side view of a reclining seat. It is a side view of a reclining seat at the time of turning back a seat back. It is a block diagram explaining the composition of the vehicular seat device concerning a 3rd embodiment with the side view of a reclining seat. It is a perspective view of a reclining seat. It is a side view of a reclining seat at the time of turning back a seat back. It is a perspective view of a reclining seat at the time of turning back a seat back.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the drawings, the same or similar parts will be denoted by the same or similar reference numerals, and overlapping descriptions will be omitted. Each drawing is schematic and includes cases different from actual ones. The embodiments described below exemplify apparatuses and methods for embodying the technical idea of the present invention, and the technical ideas of the present invention are specified to the devices and methods illustrated in the following embodiments. It is not something to do. Various changes can be added to the technical idea of the present invention within the technical scope described in the claims.

First Embodiment
As shown in FIG. 1, the vehicle seat device according to the first embodiment of the present invention includes a reclining seat 1, an angle sensor 51, an angle adjustment actuator 52, a position adjustment actuator 53, a controller 54, and an input interface. And (I / F) 55.
The reclining seat 1 is a seat that is mounted on a vehicle and that is seated on a vehicle occupant.

  The reclining seat 1 includes a seat back 10 having a backrest 11 for supporting the back (rear) of the occupant, a seat cushion 20 and an auxiliary portion 21 on which the occupant is seated, a lower rail 31, an upper rail 32, a lower frame 33 and , Lifter mechanism 40.

  The backrest 11 corresponds to an area of the front of the seatback 10 that directly supports the occupant's back. The auxiliary portion 21 is a member that shares a seat surface on which an occupant sits with the seat cushion 20, and is a member that connects the seat cushion 20 and the seat back 10. The auxiliary portion 21 is L-shaped as viewed from the side as shown in FIG. The auxiliary portion 21 is fixed to the lower end portion (the end portion on the seat cushion 20 side) of the seat back 10 and moves integrally with the seat back 10.

  The auxiliary portion 21 is coupled to the seat cushion 20 so as to be rotatable around a rotation shaft 100 disposed at the rear end (right end in FIG. 1) of the seat cushion 20. The rotation axis 100 is parallel to the width direction (the depth direction in FIG. 1) of the vehicle. The seat cushion 20 and the seat back 10 relatively rotate around the rotation axis 100. As shown in FIG. 1, when the inclination angle θ of the seat back 10 (backrest 11) is a reference angle (for example, 21 °), a part of the seat cushion 20 and the auxiliary portion 21 supports a seat supporting the buttocks of the occupant. Construct a face.

  The seat back 10 has a seat back frame (not shown) inside. The seat back frame constitutes a framework of the seat back 10, and defines an inclination angle (back angle) θ of the seat back 10. The inclination angle θ is an angle between the vertical direction D1 and the direction D2 along the seatback frame inclined rearward. The seat back frame is, for example, parallel to the backrest 11. The direction D2 is a direction parallel to, for example, a torso line defined in JIS D0024 or ISO 6549.

  The lower rail 31 is installed on a floor surface of the vehicle via a bracket so as to be along the front-rear direction of the vehicle (the left-right direction in FIG. 1). The upper rail 32 is disposed slidably on the lower rail 31. As a result, the reclining seat 1 can slide in the longitudinal direction of the vehicle. The lower frame 33 is disposed on the upper rail 32 and supports the seat cushion 20 via the lifter mechanism 40.

  As shown in FIG. 2, when the seat back 10 and the auxiliary portion 21 rotate around the rotation axis 100, the inclination angle θ of the seat back 10 changes. At this time, the lifter mechanism 40 displaces the seat cushion 20 in conjunction with the inclination angle θ of the seatback 10. The lift mechanism 40 is configured by, for example, a link mechanism. Specifically, when the inclination angle θ is within a predetermined range (for example, 21 ° to 55 °), the seat cushion 20 is raised by the lifter mechanism 40 as the inclination angle θ increases, and the inclination angle θ decreases. Is lowered by the lifter mechanism 40.

  As the seat cushion 20 ascends, the rotary shaft 100 disposed at the rear end of the seat cushion 20 also ascends. The seat cushion 20 is lifted by the lifter mechanism 40 so that the rising rate of the rear end of the seat cushion 20 is larger than that of the front end. Thereby, as shown in FIG.1 and FIG.2, the rotation center R of the seat back 10 and the auxiliary part 21 is defined.

  The rotation center R is fixed relative to the vehicle or defined to fall within a predetermined range. The rotation center R is defined below the rotation center H (reference rotation center) of the occupant at the time of reclining and in front of the lower end of the seat back 10 (left in FIG. 1). The “rotation center of the occupant at the time of reclining” is, for example, an H point defined in JIS D 0024 or ISO 6549, and may be a rotation center point of the trunk and the thigh.

  FIG. 3 is a schematic view for explaining a state in which a human is actually seated on the seat. In FIG. 3, a point A corresponds to the lower end portion of the seatback 10 and corresponds to the general center of rotation of the seatback. Point C corresponds to the reference rotation center H of the occupant. When point C corresponds, for example, to the greater trochanter in the adult male's 50th percentile phantom, point B generally corresponds to the ischial tubercle. Point D corresponds to the point of intersection of the seat normal and the seat passing through point C.

  The inventors set the rotation center R of the backrest to each of the points A to D in FIG. 3 and change the inclination angle θ of the seatback 10 from 21 ° to 55 °, and the back of the occupant and The support position change of the buttocks was measured. As a result, the position of the rotation center R with the least change in support position on the back was point C. Next, the position of the rotation center R at which the change in support position of the back is small was the point D. On the other hand, the positions of the rotation center R at which the support position change of the buttocks is the smallest were the point A and the point D.

  The center of rotation R of the seat back 10, that is, the backrest 11 is defined below the reference center of rotation H of the occupant and in front of the lower end of the seat back 10. Therefore, in FIG. 3, the rotation center R is defined to be lower than the point C and in front of the point A (leftward in FIG. 3). As a result, the rotation center R of the backrest 11 is close to the reference rotation center H of the occupant, so it is possible to reduce the change in support position of the occupant's back at the time of reclining.

  Furthermore, the rotation center R may be defined closer to the seat cushion 20 than the reference rotation center H in a direction parallel to the normal of the seat cushion 20 passing through the reference rotation center H of the occupant. That is, in FIG. 3, the rotation center R is defined to be lower than a plane passing through the point C and parallel to the seat surface. Also, the rotation center R may be defined between the point C and the point D. This makes it possible to reduce the change in the support position of the back and buttocks of the occupant at the time of reclining. In addition, the rotation center R may be defined in a predetermined distance range from the reference rotation center H. The rotation center R is a rotation center determined by the backrest 11 at an arbitrary inclination angle θ within a predetermined range (for example, 21 ° to 55 °).

  The angle sensor 51 detects the inclination angle θ of the seat back 10. The angle sensor 51 may detect the inclination angle θ based on the angle of the seat back 10 relative to the seat cushion 20 and the displacement amount of the seat cushion 20. The angle sensor 51 outputs a signal indicating the inclination angle θ to the controller 54.

  The angle adjustment actuator 52 is an actuator that adjusts the inclination angle θ of the seatback 10 by rotating the seatback 10 and the auxiliary unit 21 around the rotation axis 100. The angle adjustment actuator 52 is, for example, a motor disposed on the rotation shaft 100, and adjusts the angle of the seat back 10 with respect to the seat cushion 20. The position adjustment actuator 53 is an actuator that adjusts the position of the rotation center R of the backrest 11 (seatback 10) to a predetermined position by displacing the seat cushion 20 and displacing the rotation shaft 100. The position adjustment actuator 53 is, for example, a motor disposed in the lifter mechanism 40.

  The controller 54 is, for example, a processing circuit such as an electronic control unit (ECU) that performs arithmetic logic operation of processing necessary for the operation performed by the vehicle seat device according to the first embodiment. An output interface may be provided. In the processor, a microprocessor or the like equivalent to a central processing unit (CPU) including an arithmetic and logic unit (ALU), various registers and the like can be corresponded. The storage device can be configured by any combination appropriately selected from a group including a plurality of registers, a plurality of cache memories, a main storage device, an auxiliary storage device, a semiconductor memory, a disk medium, and the like. The processor executes a program (vehicle seat adjustment program) stored in advance in the storage device and indicating a series of processes required for the operation of the vehicle seat device according to the first embodiment.

  The controller 54 may be physically configured by a programmable logic device (PLD) such as a field programmable gate array (FPGA), and is equivalently set by software processing in a general-purpose semiconductor integrated circuit. It may be a functional logic circuit or the like. The controller 54 may be comprised of a single piece of hardware or may be comprised of separate pieces of hardware. The angle sensor 51, the angle adjustment actuator 52, the position adjustment actuator 53, the controller 54, and the input I / F 55 are connected to one another by a communication network such as a controller area network (CAN) bus, for example.

  The input I / F 55 is an input interface that outputs, for example, a signal corresponding to the operation of the occupant to the controller 54. As the input I / F 55, in addition to a pointing device such as a touch panel, a microphone, various switches, a keyboard, etc., it is also possible to adopt a camera, an electroencephalograph, etc. The input I / F 55 outputs, to the controller 54, an instruction signal indicating an increase or decrease of the inclination angle θ of the seat back 10, and an instruction signal indicating a predetermined inclination angle θ.

  The controller 54 adjusts the inclination angle θ of the seatback 10 by driving the angle adjustment actuator 52 in accordance with the instruction signal input from the input I / F 55. The controller 54 may adjust the inclination angle θ in accordance with the operation mode of the vehicle. The driving modes are roughly classified into, for example, an automatic driving mode in which at least one of preceding vehicle following control, inter-vehicle distance control, and lane deviation prevention control is performed, and a manual driving mode in which none of them is performed.

  The controller 54 drives the position adjustment actuator 53 in accordance with, for example, a signal indicating the tilt angle θ input from the angle sensor 51. The position adjustment actuator 53 displaces the seat cushion 20 in conjunction with the inclination angle θ of the seat back 10. Thereby, the backrest 11 rotates around the rotation center R in conjunction with the inclination angle θ of the seat back 10.

  Alternatively, the angle adjustment actuator 52 and the position adjustment actuator 53 may be configured by an integral actuator. That is, a mechanism such as a link mechanism configured to rotate the backrest 11 around a rotation center R defined below the reference rotation center H of the occupant and in front of the lower end of the seatback 10 is integrally formed. It may be driven by an actuator of In this case, the angle sensor 51 is unnecessary.

  Next, an example of a method of adjusting a vehicle seat by the vehicle seat device according to the first embodiment will be described using the flowchart of FIG. 4. A series of processes shown in FIG. 4 are repeatedly executed in a predetermined cycle.

  First, in step S1, the controller 54 determines whether the tilt angle θ of the seatback 10 has changed based on the signal indicating the tilt angle θ input by the angle sensor 51. If the inclination angle θ has changed, the process proceeds to step S2. If the inclination angle θ does not change, the process ends.

  In step S2, the controller 54 displaces the seat cushion 20 and the rotation shaft 100 by driving the position adjustment actuator 53 in accordance with the signal indicating the inclination angle θ input by the angle sensor 51. Thereby, the controller 54 adjusts the position of the seat back 10 so that the rotation center R is fixed relative to the vehicle or falls within a predetermined range.

  According to the vehicle seat device of the first embodiment, the backrest 11 is below the reference rotation center H of the occupant at the time of reclining and around the rotation center R defined forward of the lower end of the seatback 10. Rotate. As a result, a change in relative position between the back of the occupant and the backrest 11 at the time of reclining can be reduced, and a change in support position of the back of the occupant can be reduced.

  The rotation center R may be defined below the reference rotation center H in a direction parallel to the normal of the seat cushion 20 passing through the reference rotation center H of the occupant. Thereby, the relative position change of the buttocks of the occupant and the seat cushion 20 at the time of reclining is reduced, and it is possible to reduce not only the support position change of the occupants back but also the support position change of the buttocks.

  Further, according to the vehicle seat adjustment device according to the first embodiment, the seat back 10 rotates around the rotation axis 100 disposed at the rear end of the seat cushion 20, and the seat cushion 20 has the inclination angle of the seat back 10. It moves in conjunction with θ. Thereby, a mechanism for defining the rotation center R of the seat back 10 can be disposed in front of the seat back 10, so that the reclining seat 1 is prevented from protruding rearward, Space can be secured.

Second Embodiment
The vehicle seat device according to the second embodiment of the present invention differs from the first embodiment in that the reclining seat 1A includes a link mechanism 40A provided behind the seat cushion 20, as shown in FIG. . The configurations, operations, and effects not described in the second embodiment are substantially the same as those in the first embodiment, and are omitted to avoid duplication.

  The seatback 10A of the reclining seat 1A includes, for example, a backrest 11, a seatback frame 12A, and a headrest frame 15. The seat back frame 12A is disposed inside the seat back 10A and constitutes a framework of the seat back 10A. The headrest frame 15 is disposed on the upper portion of the seatback frame 12A, and constitutes a framework of a headrest (not shown). The seat cushion 20A of the reclining seat 1A has a seat cushion frame 25 that constitutes the framework of the seat cushion 20A.

  The link mechanism 40A includes a fixed link 41 relatively fixed to the seat cushion frame 25, a first joint 42 and a second joint 43, and a first movable link 44 and a second movable link 45. Each of the first joint 42 and the second joint 43 is disposed at the fixed link 41. The first movable link 44 is coupled to the fixed link 41 by a first joint 42. The second movable link 45 is connected to the fixed link 41 by the second joint 43.

  At the end of the first movable link 44 opposite to the first joint 42, the rotation shaft 100 of the seatback 10A is disposed. The rotating shaft 100 is located at the lower end of the seatback 10A. The seat back 10A rotates around the rotation axis 100. A third joint (not shown) is disposed at an end of the second movable link 45 opposite to the second joint 43, and a third movable (not shown) is disposed between the rotary shaft 100 and the third joint. Links are placed.

  The seatback 10A rotates around the rotation axis 100 by driving the angle adjustment actuator 52 under the control of the controller 54. Thus, the inclination angle θ of the seatback 10A changes. The inclination angle θ is detected by the angle sensor 51 and input to the controller 54. The controller 54 operates the link mechanism 40A by driving the position adjustment actuator 53 in accordance with the inclination angle θ.

  As shown in FIGS. 5 and 6, the link mechanism 40A displaces the rotating shaft 100 by operating in conjunction with the inclination angle θ. Specifically, when the inclination angle θ is within a predetermined range (for example, 21 ° to 55 °), the rotation shaft 100 is lowered by the link mechanism 40A as the inclination angle θ increases, and the inclination angle θ decreases. Is raised by the link mechanism 40A. More specifically, when the inclination angle θ increases, the distance between the seat cushion 20A and the backrest 11 decreases, and when the inclination angle θ decreases, the distance between the seat cushion 20A and the backrest 11 increases. Thus, the distance between the seat cushion 20A and the backrest 11 is adjusted by the link mechanism 40A in conjunction with the inclination angle θ of the seatback 10A. Thereby, the rotation center R of the backrest 11 is defined.

  The controller 54 drives the position adjustment actuator 53 in accordance with, for example, a signal indicating the tilt angle θ input from the angle sensor 51. The position adjustment actuator 53 operates the link mechanism 40A in conjunction with the inclination angle θ of the seat back 10A. Thereby, the backrest 11 rotates around the rotation center R in conjunction with the inclination angle θ of the seat back 10A.

  The rotating shaft 100 is not necessarily displaced by the position adjusting actuator 53. For example, the seatback 10A adopts a mechanism in which the tilt angle θ is adjusted by an integral actuator, and the link mechanism 40A is configured such that the backrest 11 rotates around the rotation center R in conjunction with the tilt angle θ. You may

  In the example shown in FIGS. 5 and 6, the rotation center R is located below the reference rotation center H of the occupant. More precisely, the rotation center R is roughly defined at a position corresponding to the intersection of the normal to the seat cushion 20A passing the reference rotation center H and the seat cushion 20A. Thus, according to the vehicle seat device of the second embodiment, not only the change in the support position of the occupant's back but also the change in the support position of the buttock can be reduced.

  According to the vehicle seat device of the second embodiment, since the link mechanism 40A defining the rotation center R of the backrest 11 is disposed behind the seat cushion 20A, a space under the seat cushion 20A is secured. be able to. In particular, in the case of an electrically powered vehicle that needs to be equipped with a large capacity battery or a power receiving device, a space under the seat is generally required. Therefore, by employing the link mechanism 40A, the space can be effectively used.

Third Embodiment
In the vehicle seat device according to the third embodiment of the present invention, as shown in FIGS. 7 and 8, the seat back 10B of the reclining seat 1B has a backrest 11B that slides along the seatback frame 12B, etc. Are different from the first embodiment. Configurations, operations, and effects not described in the third embodiment are substantially the same as those in the first and second embodiments, and are omitted to avoid duplication.

  The lower end portion of the seat back frame 12B is coupled to the rear end portion of the seat cushion frame 25 via the rotation shaft 100. Thereby, the seat back 10B rotates around the rotation axis 100 fixed to the seat cushion 20B. The seat back 10B includes a backrest frame 13 disposed in parallel to the seatback frame 12B as a whole. The backrest 11B and the headrest frame 15 are fixed relative to the backrest frame 13. The backrest 11B, the headrest frame 15, and the backrest frame 13 are disposed on the seatback 10B slidably along the seatback frame 12B.

  The seat back 10B rotates around the rotation axis 100 by driving the angle adjustment actuator 52 under the control of the controller 54. Thus, the inclination angle θ of the seatback 10B changes. The angle sensor 51 detects the inclination angle θ, and outputs a signal indicating the inclination angle θ to the controller 54. The controller 54 controls the drive of the position adjustment actuator 53 in accordance with the inclination angle θ.

  As shown in FIGS. 9 and 10, the position adjustment actuator 53 adjusts the distance between the seat cushion 20B and the backrest 11B by sliding the backrest 11B along the seatback frame 12B. As described above, the controller 54 causes the backrest 11B to rotate around the rotation center R by sliding the backrest 11B in conjunction with the inclination angle θ via the position adjustment actuator 53.

  Specifically, when the inclination angle θ is within a predetermined range (for example, 21 ° to 55 °), when the inclination angle θ becomes large, the distance between the seat cushion 20B and the backrest 11B becomes short, and the inclination angle θ becomes If it becomes smaller, the distance between the seat cushion 20B and the backrest 11B becomes longer. Thus, the distance between the seat cushion 20A and the backrest 11 is adjusted by the controller 54 in accordance with the inclination angle θ. Thereby, the rotation center R of the backrest 11 is defined.

  The backrest 11B does not necessarily have to be slid by the position adjustment actuator 53 separate from the angle adjustment actuator 52. For example, the seat back 10B is adjusted in inclination angle θ by an integral actuator, and is linked to the inclination angle θ by a link mechanism 40B configured to slide the backrest frame 13 along the seatback frame 12B, etc. It may be made to rotate around the rotation center R. The link mechanism 40B is preferably disposed inside the seat cushion frame 25 below the backrest 11B.

  In the vehicle seat device according to the third embodiment, the first cover for covering the seatback frame 12B and the second cover for covering the backrest 11B and sliding together with the backrest 11B are used as a cover for the seatback 10B. There is a need to.

  In the example shown in FIGS. 7 and 9, the rotation center R substantially coincides with the reference rotation center H of the occupant. Thus, in the present invention, "below the reference rotation center H" may include the case below the reference rotation center H below any point within a predetermined range. Thus, according to the vehicle seat device related to the third embodiment, it is possible to significantly reduce the change in the support position of the occupant's back.

  According to the vehicle seat device of the third embodiment, the distance between the seat cushion 20B and the backrest 11B is adjusted by sliding the backrest 11B along the seat back frame 12B. Therefore, it is possible to secure a space below or behind the seat cushion 20B. In particular, in an electrically powered vehicle that needs to be equipped with a large capacity battery or a power receiving device, a space under the seat is generally required, so the space can be used effectively.

(Other embodiments)
While the embodiments of the present invention have been described above, it should not be understood that the descriptions and the drawings, which form a part of this disclosure, limit the present invention. Various alternative embodiments, examples and operation techniques will be apparent to those skilled in the art from this disclosure.

  For example, in the embodiment described above, the longitudinal position of the reclining seat may be adjusted in conjunction with the inclination angle θ using an actuator disposed on the lower rail 31 or the upper rail 32.

  In addition to the above, it is a matter of course that the present invention includes various embodiments and the like which are not described herein, such as a configuration to which any of the configurations described in the above-described embodiments are applied. Accordingly, the technical scope of the present invention is defined only by the invention-specifying matters according to the scope of claims appropriate from the above description.

1, 1A, 1B Reclining seat 10, 10A, 10B Seat back 11, 11B Backrest 12A, 12B Seat back frame 20, 20A, 20B Seat cushion 25 Seat cushion frame 40A, 40B Link mechanism 52 Angle adjustment actuator 53 Position adjustment actuator 100 Rotation axis H Rotation center of the occupant (reference rotation center)
R backrest rotation center θ inclination angle (back angle)

Claims (12)

A vehicle seat adjustment method comprising: a seat cushion; and an actuator for adjusting an inclination angle of a backrest supporting a back of an occupant seated on the seat cushion,
A vehicle seat characterized in that the backrest is rotated below a reference rotation center of an occupant at the time of reclining and around a rotation center defined in front of an end of the backrest on the seat cushion side. How to adjust the   The vehicle according to claim 1, wherein the second rotation center is defined on the seat cushion side with respect to the reference rotation center in a direction parallel to the normal of the seat cushion passing through the reference rotation center. How to adjust the sheet.   The method for adjusting a vehicle seat according to claim 1 or 2, wherein the distance between the seat cushion and the backrest is adjusted in conjunction with the inclination angle of the backrest.   The method for adjusting a vehicle seat according to claim 3, wherein the distance between the seat cushion and the backrest is shortened as the inclination angle of the backrest increases.   The method according to claim 3, wherein the distance between the seat cushion and the backrest is increased when the inclination angle of the backrest decreases.   The method for adjusting a vehicle seat according to any one of claims 1 to 5, wherein the backrest is rotated by a link mechanism fixed to the seat cushion.   The method for adjusting a vehicle seat according to claim 6, wherein the link mechanism is provided at the rear of the seat cushion.   The distance between the seat cushion and the backrest is adjusted by sliding the backrest along the frame of the seatback, according to any one of claims 3 to 5, How to adjust the vehicle seat.   The distance between the seat cushion and the backrest is adjusted by a position adjustment actuator that adjusts the position of the backrest in accordance with the inclination angle of the backrest. The adjustment method of the vehicular seat given in paragraph 1.   The method for adjusting a vehicle seat according to claim 1, wherein the backrest rotates around a rotation axis disposed at a rear end portion of the seat cushion.   10. The method for adjusting a vehicle seat according to claim 9, wherein the seat cushion is displaced in conjunction with the inclination angle of the backrest. A vehicle seat apparatus comprising: a seat cushion; and an actuator for adjusting an inclination angle of a backrest supporting a back of an occupant seated on the seat cushion,
The seat for a vehicle according to the present invention is characterized in that the backrest rotates around a rotation center defined below the reference rotation center of the occupant at the time of reclining and forward of the end portion on the seat cushion side of the backrest. apparatus.

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