Vehicle seating system

Abstract

Adjust the seat position appropriately. [Solution] In the vehicle seat device, a support 18 rotatably supports the seat 12, and an actuator 24 moves the seat 12 so that the seat 12 rotates around the support 18. Here, the position in which the support 18 supports the seat 12 can be changed. Therefore, the position of the center of rotation of the seat 12 can be changed, and the posture of the seat 12 can be appropriately adjusted.

Description

Technical Field

[0001] The present invention relates to a vehicle seat device in which an occupant is seated on a seat.

Background Art

[0002] In the vehicle occupant posture control device described in the following Patent Document 1, a rotating shaft support member rotatably supports the vehicle seat from below, and a seat posture driving device moves the vehicle seat to rotate the vehicle seat around the rotating shaft support member, thereby adjusting the posture of the vehicle seat.

[0003] Here, in such a vehicle occupant posture control device, it is preferable that the posture of the vehicle seat can be adjusted appropriately.

Prior Art Literature

Patent Literature

[0004]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0005] An object of the present invention, in consideration of the above facts, is to obtain a vehicle seat device capable of appropriately adjusting the posture of a seat.

Means for Solving the Problem

[0006] The vehicle seat device according to the first aspect of the present invention comprises: a seat on which a vehicle occupant is seated; a support body that rotatably supports the seat from below and is configured such that the position at which the seat is supported can be changed; and a moving mechanism that moves the seat to rotate the seat around the support body.

[0007] In the first aspect of the present invention, a vehicle seat device is used in which a vehicle occupant is seated in the seat. A support is rotatably supported from below by a support, and a moving mechanism moves the seat, causing it to rotate around the support, thereby adjusting the seat's position.

[0008] Here, the position in which the support holds the sheet is made adjustable. This allows the position of the sheet's center of rotation to be changed, and the sheet's orientation to be appropriately adjusted.

[0009] A second aspect of the present invention is a vehicle seat device in the first aspect of the present invention, wherein the support body has a plurality of support members, and a support member that rotatably supports the seat from below is selected, thereby changing the position in which the support body supports the seat.

[0010] In a vehicle seat device according to a second aspect of the present invention, the support has a plurality of support members, and a support member is selected to rotatably support the seat from below, thereby changing the position in which the support holds the seat. As a result, the position of the seat's center of rotation can be changed.

[0011] A third aspect of the present invention is a vehicle seat device in which, in the first or second aspect of the present invention, the support is displaced and the position in which the support supports the seat is changed.

[0012] In a third aspect of the present invention, a vehicle seat device is displaced, and the position in which the support body supports the seat is changed. This allows the position of the seat's center of rotation to be changed.

[0013] A fourth aspect of the present invention is a vehicle seat device in any one of the first to third aspects of the present invention, wherein the position in which the support body supports the seat is changed based on at least one of the vehicle's running state, motion state, and posture state, and the moving mechanism moves the seat.

[0014] In a vehicle seat device according to a fourth aspect of the present invention, the position in which the support body supports the seat is changed based on at least one of the vehicle's driving state, motion state, and posture state, and the moving mechanism moves the seat. Therefore, the posture of the seat can be adjusted based on at least one of the vehicle's driving state, motion state, and posture state.

[0015] It should be noted that the vehicle's posture is not necessarily limited to cases where the vehicle body is tilted. For example, during normal acceleration, deceleration, or turning, when acceleration occurs in the longitudinal and lateral directions for the occupants, tilting the seat in the opposite direction can have the effect of canceling out (canceling) the longitudinal and lateral acceleration for the occupants. [Effects of the Invention]

[0016] As described above, the vehicle seat device of the present invention allows for appropriate adjustment of the seat's posture. [Brief explanation of the drawing]

[0017] [Figure 1] This is a left-side view showing a vehicle seat device according to the first embodiment of the present invention. [Figure 2] (A) and (B) are left-side views showing the first configuration of the vehicle seat device in Figure 1, where (A) shows the normal state and (B) shows the operating state. [Figure 3] (A) and (B) are left-side views showing the second configuration of the vehicle seat device in Figure 1, where (A) shows the normal state and (B) shows the operating state. [Figure 4] Figures (A) and (B) show a vehicle seat device according to a second embodiment of the present invention, where (A) is a side view seen from the left and (B) is a top view seen from above showing the seat support mechanism. [Figure 5] This is a left-view side view showing the first configuration of a vehicle seat device according to the third embodiment of the present invention. [Figure 6](A) and (B) are side views of the vehicle seat device of FIG. 5 as viewed from the left, wherein (A) shows the change from the first configuration to the second configuration, and (B) shows the change from the second configuration to the first configuration. [Figure 7] It is a top view of a seat support mechanism of a vehicle seat device according to a fourth embodiment of the present invention as viewed from above. MODE FOR CARRYING OUT THE INVENTION

[0018] [First Embodiment] FIG. 1 shows a vehicle seat device 10 according to a first embodiment of the present invention in a side view as viewed from the left. In the drawings, the front of the vehicle seat device 10 is indicated by an arrow FR, the right side of the vehicle seat device 10 is indicated by an arrow RH, and the upper side of the vehicle seat device 10 is indicated by an arrow UP.

[0019] The vehicle seat device 10 according to the present embodiment is provided in a cabin of a vehicle (automobile), and the front, right, and upper directions of the vehicle seat device 10 face the front, right, and upper directions of the vehicle, respectively.

[0020] As shown in FIG. 1, the vehicle seat device 10 is provided with a seat 12 on which a vehicle occupant sits. A seat cushion 12A is provided at a lower portion of the seat 12, the seat cushion 12A is disposed substantially horizontally and supports an upper body of the occupant from a lower side. A seat back 12B is provided above a rear end portion of the seat cushion 12A, the seat back 12B is disposed substantially vertically and supports a back of the occupant from a rear side.

[0021] The seat 12 is supported from below on a floor portion 14 of the vehicle (a floor portion of the vehicle cabin) by a seat support mechanism 16.

[0022] A first pivot body 20, which serves as a support member constituting the support body 18, is provided on the front side of the seat support mechanism 16, and the first pivot body 20 is fixed on the floor portion 14. A cylindrical first pivot 20A is provided at the upper end of the first pivot body 20, and the first pivot 20A extends in the left-right direction. The first pivot 20A supports the lower part of the front of the seat cushion 12A at the left-right center, and the seat 12 is rotatable in the front-rear direction around the first pivot 20A. Furthermore, the first pivot body 20 can be detached from and connected to the first pivot 20A (see Figure 3(A)).

[0023] A second pivot body 22, which constitutes a support member of the support body 18, is provided in the middle of the seat support mechanism 16 in the front-rear direction, and the second pivot body 22 is fixed on the floor portion 14. A cylindrical second pivot 22A is provided at the upper end of the second pivot body 22, and the second pivot 22A extends in the left-right direction. The second pivot 22A supports the lower part of the middle portion of the seat cushion 12A in the front-rear direction at the left-right center, and the seat 12 is rotatable in the front-rear direction around the second pivot 22A. In addition, the second pivot body 22 can be detached from and connected to the second pivot 22A (see Figure 2(A)).

[0024] An actuator 24, which serves as a moving mechanism, is provided on the rear side of the seat support mechanism 16, and the actuator 24 is fixed on the floor portion 14. A substantially cylindrical rod 24A is provided on the upper part of the actuator 24, and the rod 24A extends in the vertical direction. The tip of the rod 24A is spherical and supports the lower part of the rear of the seat cushion 12A at the center in the left-right direction, and the seat 12 is rotatable around the tip of the rod 24A. The actuator 24 is also capable of moving the rod 24A in the vertical direction (see Figures 2(B) and 3(B)).

[0025] The first pivot body 20, the second pivot body 22, and the actuator 24 are electrically connected to the vehicle's control device 26. Under the control of the control device 26, the first pivot body 20 disconnects and connects the first pivot 20A, the second pivot body 22 disconnects and connects the second pivot 22A, and the actuator 24 moves the rod 24A vertically. The control device 26 is electrically connected to the vehicle's detection device 28, which detects the vehicle's driving state, motion state, and attitude state.

[0026] Next, the operation of this embodiment will be explained.

[0027] In the vehicle seat device 10 configured as described above, the control device 26 controls the actuator 24 to move the rod 24A vertically based on the vehicle's driving state, motion state, and posture state detected by the detection device 28, either by having the first pivot body 20 connect to the first pivot 20A and the second pivot body 22 disconnect from the second pivot 22A (see Figure 2(A)), or by having the first pivot body 20 disconnect from the first pivot 20A and the second pivot body 22 connect to the second pivot 22A (see Figure 3(A)).

[0028] When the actuator 24 moves the rod 24A vertically with the first pivot body 20 connected to the first pivot 20A and the second pivot body 22 disconnected from the second pivot 22A (see Figure 2(B)), the seat 12 rotates in the front-to-back direction around the first pivot 20A. Also, when the actuator 24 moves the rod 24A vertically with the first pivot body 20 disconnected from the first pivot 20A and the second pivot body 22 connected to the second pivot 22A (see Figure 3(B)), the seat 12 rotates in the front-to-back direction around the second pivot 22A. Therefore, when the vehicle is rotated in the longitudinal direction by pitching, and the floor 14 of the vehicle is rotated in the longitudinal direction, the seat 12 is rotated in the longitudinal direction relative to the floor 14, and for example, the seat cushion 12A of the seat 12 is maintained in a state where it is positioned approximately horizontally, thereby suppressing longitudinal vibration of the seat 12 and suppressing longitudinal vibration of the occupant. Furthermore, when the seat 12 is rotated around the first pivot 20A, the distance between the first pivot 20A and the actuator 24 is large, so the rotation angle of the seat 12 by the actuator 24 is small. Also, when the seat 12 is rotated around the second pivot 22A, the distance between the second pivot 22A and the actuator 24 is small, so the rotation angle of the seat 12 by the actuator 24 is large.

[0029] Here, the support body 18 has a first pivot body 20 and a second pivot body 22, and by selecting a configuration in which the first pivot body 20 supports the sheet 12 and a configuration in which the second pivot body 22 supports the sheet 12, the position in which the support body 18 supports the sheet 12 can be changed. As a result, the position of the rotation center of the sheet 12 can be changed, and the orientation of the sheet 12 can be appropriately adjusted.

[0030] For example, when the distance between the first pivot 20A and the actuator 24 is large (see Figures 2(A) and (B)), the rotation angle of the seat 12 becomes smaller, and the seat 12 is displaced almost entirely in the vertical direction, thus suppressing vertical vibration of the occupant. This can be implemented when the distance between the first pivot 20A and the actuator 24 is large (see Figures 2(A) and (B)) or when the distance between the second pivot 22A and the actuator 24 is small (see Figures 3(A) and (B)), but when the distance between the second pivot 22A and the actuator 24 is small, the amount of tilt (rotation angle) of the seat 12 is greater, and it can respond to a wider range of acceleration and deceleration of the vehicle.

[0031] Furthermore, based on the vehicle's driving state, motion state, and posture state, the position in which the support 18 supports the seat 12 is changed, and the actuator 24 moves the seat. Therefore, the posture of the seat 12 can be adjusted based on the vehicle's driving state, motion state, and posture state.

[0032] For example, when a vehicle accelerates or decelerates, the pitching of the vehicle causes the seat 12 to tilt in the longitudinal direction. By counteracting this longitudinal tilt of the seat 12, the longitudinal vibration of the occupant can be suppressed.

[0033] Furthermore, the vehicle seat device 10 is equipped with only one actuator 24. This makes it easy to control the rotation of the seat 12 and reduces costs.

[0034] In this embodiment, the first pivot body 20, the second pivot body 22, and the actuator 24 are arranged in the front-to-back direction, and the seat 12 is rotated in the front-to-back direction. However, the first pivot body 20, the second pivot body 22, and the actuator 24 may be arranged in the left-to-right direction, and the seat 12 may be rotated in the left-to-right direction. In this case, when the vehicle is rotated left-to-right by rolling, and the floor portion 14 of the vehicle is rotated left-to-right, the seat 12 is rotated left-to-right relative to the floor portion 14, and for example, the seat cushion 12A of the seat 12 is maintained in a state where it is positioned approximately horizontally, thereby suppressing left-to-right vibration of the seat 12 and suppressing left-to-right vibration of the occupant. Also, for example, when the vehicle (automobile) turns, the rolling of the vehicle causes the seat 12 to tilt left-to-right, so by canceling out the left-to-right tilt of the seat 12, left-to-right vibration of the occupant can be suppressed.

[0035] [Second Embodiment] Figure 4(A) shows a side view of a vehicle seat device 50 according to a second embodiment of the present invention, viewed from the left, and Figure 4(B) shows a top view of the seat support mechanism 16 of the vehicle seat device 50, viewed from above.

[0036] The vehicle seat device 50 according to this embodiment has substantially the same configuration as the first embodiment described above, but differs in the following respects.

[0037] As shown in Figures 4(A) and 4(B), in the vehicle seat device 50 according to this embodiment, a first pivot body 20 is provided on the front and left side of the seat support mechanism 16, and the first pivot 20A of the first pivot body 20 is spherical. The first pivot 20A supports the lower part of the front and left portion of the seat cushion 12A, and the seat 12 is rotatable about the first pivot 20A.

[0038] A second pivot body 22 is provided on the front and right side of the seat support mechanism 16, and the front-to-back position of the second pivot body 22 coincides with the front-to-back position of the first pivot body 20. The second pivot 22A of the second pivot body 22 is spherical and supports the lower part of the front and right portion of the seat cushion 12A, and the seat 12 is rotatable about the second pivot 22A.

[0039] A third pivot body 52 is provided on the rear and left side of the seat support mechanism 16 as a support member constituting the support body 18, and the third pivot body 52 is fixed on the floor 14 of the vehicle. The left-right position of the third pivot body 52 coincides with the left-right position of the first pivot body 20, and a spherical third pivot 52A is provided at the upper end of the third pivot body 52. ​​The third pivot 52A supports the lower part of the rear and left portion of the seat cushion 12A, and the seat 12 is rotatable about the third pivot 52A. The third pivot body 52 is also detachable from and reattachable to the third pivot 52A.

[0040] A fourth pivot body 54 is provided on the rear and right side of the seat support mechanism 16 as a support member constituting the support body 18, and the fourth pivot body 54 is fixed on the floor portion 14. The front-rear position of the fourth pivot body 54 coincides with the front-rear position of the third pivot body 52, and the left-right position of the fourth pivot body 54 coincides with the left-right position of the second pivot body 22. A spherical fourth pivot 54A is provided at the upper end of the fourth pivot body 54. The fourth pivot 54A supports the lower part of the rear and right portion of the seat cushion 12A, and the seat 12 is rotatable about the fourth pivot 54A. The fourth pivot body 54 is also detachable from and reattachable to the fourth pivot 54A.

[0041] An actuator 24 is provided at the center of the seat support mechanism 16 in the front-rear and left-right directions, and the tip of the rod 24A of the actuator 24 supports the lower part of the seat cushion 12A at the center in the front-rear and left-right directions.

[0042] The third pivot body 52 and the fourth pivot body 54 are electrically connected to the control device 26, and under the control of the control device 26, the third pivot body 52 disconnects and connects the third pivot 52A, and the fourth pivot body 54 disconnects and connects the fourth pivot 54A.

[0043] Next, the operation of this embodiment will be explained.

[0044] In the vehicle seat device 50 configured as described above, the control device 26 controls the actuator 24 to move the rod 24A vertically based on the vehicle's driving state, motion state, and posture state detected by the detection device 28, such that the first pivot body 20 and the second pivot body 22 are connected to the first pivot 20A and the second pivot 22A respectively, and the third pivot body 52 and the fourth pivot body 54 are disconnected from the third pivot 52A and the fourth pivot 54A respectively, or that the first pivot body 20 and the second pivot body 22 are disconnected from the first pivot 20A and the second pivot 22A respectively, and the third pivot body 52 and the fourth pivot body 54 are connected to the third pivot 52A and the fourth pivot 54A respectively.

[0045] When the actuator 24 moves the rod 24A in the vertical direction, with the first pivot body 20 and the second pivot body 22 connecting the first pivot 20A and the second pivot 22A respectively, and the third pivot body 52 and the fourth pivot body 54 disconnecting the third pivot 52A and the fourth pivot 54A respectively, the seat 12 rotates in the front-to-back direction around the first pivot 20A and the second pivot 22A. Also, when the actuator 24 moves the rod 24A in the vertical direction, with the first pivot body 20 and the second pivot body 22 disconnecting the first pivot 20A and the second pivot 22A respectively, and the third pivot body 52 and the fourth pivot body 54 connecting the third pivot 52A and the fourth pivot 54A respectively, the seat 12 rotates in the front-to-back direction around the third pivot 52A and the fourth pivot 54A. Therefore, when the vehicle rotates in the longitudinal direction due to pitching, and the floor 14 of the vehicle rotates in the longitudinal direction, the seat 12 rotates in the longitudinal direction relative to the floor 14, so that, for example, the seat cushion 12A of the seat 12 is maintained in a state where it is positioned approximately horizontally, thereby suppressing longitudinal vibration of the seat 12 and suppressing longitudinal vibration of the occupant.

[0046] Furthermore, under the control of the control device 26, based on the vehicle's driving state, motion state, and attitude state detected by the detection device 28, the actuator 24 moves the rod 24A in the vertical direction when the first pivot body 20 and the third pivot body 52 are connected to the first pivot 20A and the third pivot 52A respectively, and the second pivot body 22 and the fourth pivot body 54 are disconnected to the second pivot 22A and the fourth pivot 54A respectively, or when the first pivot body 20 and the third pivot body 52 are disconnected to the first pivot 20A and the third pivot 52A respectively, and the second pivot body 22 and the fourth pivot body 54 are connected to the second pivot 22A and the fourth pivot 54A respectively.

[0047] When the actuator 24 moves the rod 24A in the vertical direction, with the first pivot body 20 and the third pivot body 52 connected to the first pivot 20A and the third pivot 52A respectively, and the second pivot body 22 and the fourth pivot body 54 disconnected from the second pivot 22A and the fourth pivot 54A respectively, the seat 12 rotates left and right around the first pivot 20A and the third pivot 52A. Also, when the actuator 24 moves the rod 24A in the vertical direction, with the first pivot body 20 and the third pivot body 52 disconnected from the first pivot 20A and the third pivot 52A respectively, and the second pivot body 22 and the fourth pivot body 54 connected to the second pivot 22A and the fourth pivot 54A respectively, the seat 12 rotates left and right around the second pivot 22A and the fourth pivot 54A. Therefore, when the vehicle is rotated from side to side by rolling, and the floor 14 of the vehicle rotates from side to side, the seat 12 rotates from side to side relative to the floor 14, and for example, the seat cushion 12A of the seat 12 is maintained in a state where it is positioned approximately horizontally, thereby suppressing vibrations of the seat 12 in the side-to-side direction and suppressing vibrations of the occupant in the side-to-side direction.

[0048] In this embodiment, the same effects and advantages as those of the first embodiment can be achieved.

[0049] In particular, the support 18 has a first pivot body 20, a second pivot body 22, a third pivot body 52, and a fourth pivot body 54. By selecting a configuration in which the first pivot body 20 and the second pivot body 22 support the sheet 12, a configuration in which the third pivot body 52 and the fourth pivot body 54 support the sheet 12, a configuration in which the first pivot body 20 and the third pivot body 52 support the sheet 12, and a configuration in which the second pivot body 22 and the fourth pivot body 54 support the sheet 12, the position in which the support 18 supports the sheet 12 can be changed. As a result, the position of the rotation center of the sheet 12 can be changed, and the orientation of the sheet 12 can be appropriately adjusted.

[0050] [Third Embodiment] Figure 5 shows a vehicle seat device 60 according to the third embodiment of the present invention, as viewed from the left in a side view.

[0051] The vehicle seat device 60 according to this embodiment has substantially the same configuration as the first embodiment described above, but differs in the following respects.

[0052] As shown in Figure 5, in the vehicle seat device 60 according to this embodiment, a guide 62 is provided on the lower side of the seat cushion 12A at the center in the left-right direction, and the guide 62 extends in the front-rear direction from the rear of the seat cushion 12A forward.

[0053] In the seat support mechanism 16, only the first pivot body 20 is provided on the support body 18, and the second pivot body 22 is not provided. The first pivot 20A of the first pivot body 20 is held by the guide 62 of the seat cushion 12A and supports the lower part of the seat cushion 12A in the left-right center in front of the rear, and the seat 12 is made rotatable in the front-rear direction about the first pivot 20A. The first pivot body 20 is made displaceable in the front-rear direction under the control of the control device 26, and when the first pivot body 20 is displaced in the front-rear direction, the guide 62 guides the displacement of the first pivot 20A in the front-rear direction.

[0054] Next, the operation of this embodiment will be explained.

[0055] In the vehicle seat device 60 with the above configuration, the control device 26 controls the rod 24A vertically when the first pivot body 20 is displaced in the longitudinal direction (see Figures 6(A) and (B)) based on the vehicle's driving state, motion state, and posture state detected by the detection device 28. The actuator 24 rotates the seat 12 in the longitudinal direction around the first pivot 20A of the first pivot body 20. Therefore, when the vehicle rotates in the longitudinal direction due to pitching, and the floor 14 of the vehicle rotates in the longitudinal direction, the seat 12 rotates in the longitudinal direction relative to the floor 14. For example, the seat cushion 12A of the seat 12 is maintained in a state where it is positioned approximately horizontally, thereby suppressing longitudinal vibration of the seat 12 and suppressing longitudinal vibration of the occupant. Furthermore, when the first pivot body 20 is displaced forward (see Figure 6(B)), the distance between the first pivot 20A and the actuator 24 is large, so the rotation angle of the seat 12 by the actuator 24 is reduced. Furthermore, when the first pivot body 20 is displaced to the rear (see Figure 6(A)), the distance between the first pivot 20A and the actuator 24 is small, which increases the rotation angle of the seat 12 by the actuator 24.

[0056] In this embodiment, the same effects and advantages as those of the first embodiment can be achieved.

[0057] In particular, the support body 18 (first pivot body 20) is displaced, making it possible to change the position in which the support body 18 supports the sheet 12. As a result, the position of the center of rotation of the sheet 12 can be changed, and the orientation of the sheet 12 can be appropriately adjusted.

[0058] For example, when the distance between the first pivot 20A and the actuator 24 is large (see Figure 6(B)), the rotation angle of the seat 12 becomes smaller, and the seat 12 is displaced almost entirely in the vertical direction, thus suppressing vertical vibration of the occupant. This can be implemented whether the distance between the first pivot 20A and the actuator 24 is large (see Figure 6(B)) or small (see Figure 6(A)), but when the distance between the first pivot 20A and the actuator 24 is small, the amount of tilt (rotation angle) of the seat 12 is greater, allowing it to respond to a wider range of acceleration and deceleration of the vehicle.

[0059] Furthermore, for example, when the vehicle accelerates or decelerates, the pitching of the vehicle causes the seat 12 to tilt in the longitudinal direction. By counteracting this longitudinal tilt of the seat 12, the longitudinal vibration of the occupant can be suppressed.

[0060] In this embodiment, the first pivot body 20 and actuator 24 are arranged in the front-rear direction with the first pivot body 20 displaceable in the front-rear direction, and the seat 12 is rotated in the front-rear direction. However, the first pivot body 20 and actuator 24 may be arranged in the left-right direction with the first pivot body 20 displaceable in the left-right direction, and the seat 12 may be rotated in the left-right direction. In this case, when the vehicle is rotated left-right by rolling, and the floor portion 14 of the vehicle is rotated left-right, the seat 12 is rotated left-right relative to the floor portion 14, and for example, the seat cushion 12A of the seat 12 is maintained in a state where it is positioned approximately horizontally, thereby suppressing left-right vibration of the seat 12 and suppressing left-right vibration of the occupant. Also, for example, when the vehicle (automobile) turns, the rolling of the vehicle causes a left-right tilt in the seat 12, so by canceling out the left-right tilt of the seat 12, left-right vibration of the occupant can be suppressed.

[0061] [Fourth Embodiment] Figure 7 shows a top view of the seat support mechanism 16 of a vehicle seat device 70 according to the fourth embodiment of the present invention, as seen from above.

[0062] The vehicle seat device 70 according to this embodiment has substantially the same configuration as the first embodiment described above, but differs in the following respects.

[0063] As shown in Figure 7, in the vehicle seat device 70 according to this embodiment, a guide 62 is provided on the underside of the seat cushion 12A, and the guide 62 extends from the front and left side portion of the seat cushion 12A to the rear and right side portion.

[0064] In the support body 18 of the seat support mechanism 16, the first pivot 20A of the first pivot body 20 is spherical and supported by the guide 62 of the seat cushion 12A, supporting the lower side of the seat cushion 12A, and the seat 12 is rotatable about the first pivot 20A. The first pivot body 20 is displaceable diagonally to the front left and diagonally to the rear right under the control of the control device 26, and when the first pivot body 20 is displaced diagonally to the front left and diagonally to the rear right, the guide 62 guides the displacement of the first pivot 20A diagonally to the front left and diagonally to the rear right. For this reason, the first pivot 20A is able to support the front and left side portion and the rear and right side portion of the seat cushion 12A.

[0065] A second pivot body 22 is provided on the front and right side of the seat support mechanism 16. The front-rear position of the second pivot body 22 coincides with the front-rear position of the first pivot body 20 at the front and left side, and the left-right position of the second pivot body 22 coincides with the left-right position of the first pivot body 20 at the rear and right side. The second pivot 22A of the second pivot body 22 is spherical and supports the lower part of the front and right portion of the seat cushion 12A, allowing the seat 12 to rotate around the second pivot 22A.

[0066] An actuator 24 is provided on the rear and left side of the seat support mechanism 16. The longitudinal position of the actuator 24 coincides with the longitudinal position of the first pivot body 20 at the rear and right side, and the lateral position of the actuator 24 coincides with the lateral position of the first pivot body 20 at the front and left side. The tip of the rod 24A of the actuator 24 supports the lower part of the rear and left side of the seat cushion 12A.

[0067] Next, the operation of this embodiment will be explained.

[0068] In the vehicle seat device 70 configured as described above, the control device 26 controls the actuator 24 to move the rod 24A vertically based on the vehicle's driving state, motion state, and posture state detected by the detection device 28, when the first pivot body 20 is displaced to the front and left side, or when the first pivot body 20 is displaced to the rear and right side.

[0069] With the first pivot body 20 positioned in a forward and left-side displacement, when the actuator 24 moves the rod 24A in the vertical direction, the seat 12 rotates in the longitudinal direction around the first pivot 20A and the second pivot 22A. Therefore, when the vehicle rotates in the longitudinal direction due to pitching, and the floor 14 of the vehicle rotates in the longitudinal direction, the seat 12 rotates in the longitudinal direction relative to the floor 14, so that, for example, the seat cushion 12A of the seat 12 is maintained in a substantially horizontal position, thereby suppressing longitudinal vibration of the seat 12 and suppressing longitudinal vibration of the occupant.

[0070] When the actuator 24 moves the rod 24A vertically while the first pivot body 20 is displaced to the rear and right side, the seat 12 rotates horizontally around the first pivot 20A and the second pivot 22A. Therefore, when the vehicle rotates horizontally due to rolling, and the floor 14 of the vehicle rotates horizontally, the seat 12 rotates horizontally relative to the floor 14, so that, for example, the seat cushion 12A of the seat 12 is maintained in a nearly horizontal position, thereby suppressing horizontal vibration of the seat 12 and suppressing horizontal vibration of the occupant.

[0071] In this embodiment, the same effects and advantages as those of the first embodiment can be achieved.

[0072] In particular, the support body 18 (first pivot body 20) is displaced, making it possible to change the position in which the support body 18 supports the sheet 12. As a result, the position of the center of rotation of the sheet 12 can be changed, and the orientation of the sheet 12 can be appropriately adjusted.

[0073] In the first to fourth embodiments described above, one actuator 24 is provided. However, two or more actuators 24 may be provided.

[0074] Furthermore, the first to fourth embodiments described above described the case in which the present invention is applied to seats for vehicles. However, the present invention is also applicable to seats for vehicles other than vehicles (for example, aircraft and ships). [Explanation of Symbols]

[0075] 10. Vehicle seating devices 12 sheets 18 Support 20. First pivot body (support member) 22. Second pivot body (support member) 24 Actuators (movement mechanisms) 50 Vehicle seating devices 52 Third pivot body (support member) 54. Fourth pivot body (support member) 60 Vehicle seating devices 70 Vehicle seating devices

Claims

1. The seats where the occupants sit, A support that rotatably supports the sheet from below and whose position in supporting the sheet can be changed, A moving mechanism that moves the sheet so that the sheet rotates around the support, A vehicle seat device equipped with the following features.

2. The vehicle seat device according to claim 1, wherein the support body has a plurality of support members, and a support member that rotatably supports the seat from below is selected to change the position in which the support body supports the seat.

3. The vehicle seat device according to claim 1, wherein the support is displaced and the position in which the support supports the seat is changed.

4. The vehicle seat device according to claim 1, wherein the position in which the support body supports the seat is changed based on at least one of the vehicle's driving state, motion state, and posture state, and the moving mechanism moves the seat.

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