JP7415185B2 - vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat mounted on a vehicle or the like.

2. Description of the Related Art A seat rotatably provided on the floor of an automobile about an axis extending in a substantially vertical direction is known (for example, Patent Document 1). By changing the rotational position of the seat, this seat can be arranged in a variety of ways, making it suitable for conversations between passengers, resting, and admiring the scenery. When this seat is applied to an autonomous vehicle, the driver's seat can also be arranged in various ways during autonomous driving.

JP2016-97780A

Since there are structures such as doors, pillars, dashboards, center consoles, etc. that make up the vehicle around the seat, it is difficult to secure rotation space for the seat. In particular, since a seat back that protrudes rearward is provided at the rear of the seat, it is difficult to avoid contact with the side wall of the vehicle interior. Therefore, there is a need for a seat that can rotate in a small space while avoiding contact with surrounding structures.

In view of the above background, it is an object of the present invention to provide a rotatable vehicle seat that can be rotated in a small space.

In order to solve the above problems, one aspect of the present invention provides a vehicle seat (1) having a seat cushion (7) provided on a floor (2) of the vehicle and a seat back (8) provided on the seat cushion. ), the seat cushion is provided so as to be rotatable with respect to the floor about a plurality of rotation axes (A) extending substantially vertically.

According to this configuration, the vehicle seat can be moved to various positions by selecting and rotating one rotation axis from a plurality of rotation axes. This allows the vehicle seat to pivot in a small space while avoiding surrounding structures.

Further, in the above aspect, there is a space between the floor and the seat cushion that allows rotation about one rotation axis selected from a plurality of rotation axes, and allows rotation of the remaining rotation axis. It is preferable that a rotation device (4) for regulating rotation about the axis is provided.

According to this configuration, the rotation axis of the vehicle seat can be fixed to one by the rotation device, and the rotation mode can be regulated to allow smooth rotation.

Further, in the above aspect, it is preferable that the rotation device selects the rotation axis that enables rotation depending on the rotation direction.

According to this configuration, the vehicle seat can be rotated so as to avoid surrounding structures by selecting the rotation axis according to the rotation direction.

Further, in the above aspect, the rotation axes include a front rotation axis (A1, A2) arranged at the front part of the seat cushion, and a rear rotation axis (A3) arranged at the rear part of the seat cushion. , A4), wherein the rotation device rotates the seat about the rear rotation axis when the front portion of the seat cushion is rotated inward in the width direction of the vehicle with respect to the rear portion. It is preferable to allow the cushion to rotate.

According to this configuration, the vehicle seat can avoid contact between the seat back and a structure located outward in the vehicle width direction when the vehicle seat rotates inward.

Further, in the above aspect, the rear rotation axis (A3) may be disposed inward in the width direction of the vehicle from the center in the width direction of the seat cushion.

According to this configuration, the vehicle seat can further avoid contact between the seat back and a structure located outward in the vehicle width direction when the vehicle seat rotates inward.

Further, in the above aspect, the rotation axes include a front rotation axis (A1, A2) arranged at the front part of the seat cushion, and a rear rotation axis (A3) arranged at the rear part of the seat cushion. , A4), wherein the rotation device rotates the seat cushion around the front rotation axis when the front portion of the seat cushion is rotated outward in the width direction of the vehicle relative to the rear portion. It is preferable to allow rotation of the

According to this configuration, the vehicle seat can avoid contact between the front end of the seat cushion and a structure located outward in the vehicle width direction when the vehicle seat rotates outward.

Further, in the above aspect, the rotation device has a plurality of rotation shaft units (17), and the plurality of rotation shaft units are fixed to the floor and extend in a first direction in the horizontal direction. an extending lower rail (21); an upper rail (22) fixed to the seat cushion and extending horizontally in a second direction different from the first direction; a lower slider (23), an upper slider (24) provided slidably on the upper rail and rotatably coupled to the lower slider about an axis extending substantially vertically; It is preferable to include a regulating device (25, 26) that selectively regulates movement of the lower slider and movement of the upper slider with respect to the upper rail.

According to this configuration, it is possible to configure a rotation device that can select and rotate any one of a plurality of rotation axes.

Further, in the above aspect, the rotation device includes a plurality of rotation members (52, 53, 54) arranged vertically, and a plurality of rotation members rotatably connecting the vertically adjacent rotation members. It is preferable to have a moving shaft (55, 56) and a regulating device (57, 58) that selectively regulates the rotation of the vertically adjacent rotating members.

According to this configuration, it is possible to provide a simple configuration of a rotating device that can select and rotate any one of a plurality of rotation axes.

Further, another aspect of the present invention is a lower moving member (72) provided on the floor of the vehicle, and an upper moving member (72) provided on the lower moving member so as to be rotatable about a rotation axis extending in a substantially vertical direction. A rotating device (71) including a moving member (73), a lower slide rail (12) coupled to the upper moving member, and an upper slide rail (13) displaceably provided on the lower slide rail. The seat cushion (7) is coupled to the upper slide rail, and the seat back (8) is provided on the seat cushion.

According to this configuration, even if there is one rotation axis, the seat cushion is displaced relative to the rotation axis, so the position of the rotation center of the seat cushion can be changed.

Further, in the above aspect, it is preferable that the direction of rotation of the upper moving member relative to the lower moving member is regulated depending on the position of the upper slide rail relative to the lower slide rail.

According to this configuration, contact between the seat cushion and the seat back and the structure of the vehicle can be avoided by regulating the rotation direction according to the rotation center position of the seat cushion.

According to one aspect of the present invention, a vehicle seat has a plurality of rotation axes, and can be moved to various positions by selecting and rotating one rotation axis from among the plurality of rotation axes. can. This allows the vehicle seat to pivot in a small space while avoiding surrounding structures.

Further, in the above aspect, a rotation device is provided that enables rotation around one rotation axis selected from a plurality of rotation axes and restricts rotation around the remaining rotation axes. As a result, the vehicle seat can have one rotational axis fixed, and can rotate smoothly by regulating the rotational manner.

Further, in the above embodiment, by selecting a rotation axis that allows the rotation device to rotate according to the rotation direction, the vehicle seat can rotate so as to avoid surrounding structures according to the rotation direction. It becomes possible to move.

Further, in the above aspect, when the seat cushion rotates inwardly, the rotating device enables the seat cushion to rotate around the rear rotation axis, thereby causing the seat back and the vehicle to move outward in the vehicle width direction. contact with structures located in the area can be avoided.

In the above aspect, by arranging the rear rotation axis closer to the center in the width direction of the vehicle than the center in the width direction of the seat cushion, the seat back and the vehicle are positioned outward in the width direction of the vehicle when rotated inward. Contact with structures can be further avoided.

Further, in the above aspect, when the seat cushion is rotated outward, the rotation device enables the rotation of the seat cushion around the front rotation axis, so that the front end of the seat cushion and the rotation of the seat cushion are rotated outward in the vehicle width direction of the vehicle. Contact with structures on the other side can be avoided.

Further, in the above aspect, by configuring the rotation device to have a plurality of rotation axis units, the rotation device can select and rotate one rotation axis from a plurality of rotation axes. Can be configured.

Further, in the above aspect, the rotation device includes a plurality of rotation members, a plurality of rotation shafts that rotatably connect the rotation members, and a restriction device that selectively restricts rotation of the rotation members. By adopting a configuration having these, it is possible to provide a simple configuration of a rotation device that can select one rotation axis from a plurality of rotation axes and rotate it.

Further, the rotating device includes a lower moving member provided on the floor of the vehicle and an upper moving member rotatably provided on the lower moving member so as to be rotatable about a rotation axis extending in a substantially vertical direction; A slide device including a lower slide rail coupled to a rotating member and an upper slide rail displaceably provided on the lower slide rail, a seat cushion coupled to the upper slide rail, and a seat provided on the seat cushion. By adopting a configuration having a back, even if there is only one rotation axis, the seat cushion is displaced relative to the rotation axis, so that the position of the rotation center of the seat cushion can be changed.

Further, in the above aspect, by configuring the rotating direction of the upper moving member relative to the lower moving member to be regulated according to the position of the upper slide rail relative to the lower slide rail, the seat cushion and the seat back can be connected to each other. contact with structures can be avoided.

A perspective view of a seat according to the first embodiment Exploded perspective view showing the slide device and rotation device Cross-sectional view showing one rotation shaft unit of the rotation device Block diagram showing the seat control system Explanatory diagram showing the rotation behavior of the seat during internal rotation and external rotation Side view of the seat according to the second embodiment An exploded perspective view showing a rotation device according to a second embodiment Side view of the seat according to the third embodiment Explanatory diagram showing the rotational behavior of the seat according to the third embodiment (A) during internal rotation and (B) external rotation

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the vehicle seat of the present invention is applied to an automobile seat will be described below with reference to the drawings. In the following description, front, rear, left, and right are defined based on an occupant seated on a vehicle seat.

(First embodiment)
As shown in FIG. 1, the seat 1 includes a slide device 3 provided on the upper surface of the floor 2 of the vehicle, a rotation device 4 provided on the top of the slide device 3, and a rotation device 4 provided on the top of the rotation device 4. It has a sheet main body 5. The seat 1 may be a driver's seat, a passenger seat, or a rear seat. In this embodiment, the seat 1 is configured as a driver's seat located in the right front part of the vehicle interior.

The floor 2 extends substantially horizontally. The slide device 3 supports the rotation device 4 and the seat body 5 on the floor 2 so as to be able to slide in a substantially horizontal direction with respect to the floor 2 . The rotation device 4 is provided in the slide device 3 so as to be rotatable with respect to the floor 2 around a plurality of rotation axes extending in a substantially vertical direction, and rotates the seat body 5 with respect to the floor 2 around a plurality of rotation axes. Rotatably supported. The seat body 5 includes a seat cushion 7 provided above the rotating device 4 and a seat back 8 provided at the rear of the seat cushion 7.

As shown in FIGS. 1 and 2, the slide device 3 has a pair of left and right slide rails 11 extending back and forth. Each slide rail 11 has a lower slide rail 12 and an upper slide rail 13 that are slidable relative to each other. The lower slide rail 12 extends back and forth and is connected to the upper surface of the floor 2. The upper slide rail 13 extends back and forth and is supported by the lower slide rail 12 so as to be movable in the back and forth direction. Each slide rail 11 has a locking device (not shown) that restricts sliding movement of the upper slide rail 13 with respect to the lower slide rail 12.

As shown in FIGS. 2 and 3, the rotation device 4 includes a lower plate 15 and an upper plate 16 that face each other vertically, and four rotation shaft units 17 interposed between the lower plate 15 and the upper plate 16. and has. Although there are four rotating shaft units 17 in this embodiment, there may be a plurality of rotating shaft units 17, such as two or three, in other embodiments. The lower plate 15 is a plate-like member whose surface faces upward and downward, and is coupled to the upper portions of the left and right upper slide rails 13. The upper plate 16 is a plate-like member whose surface faces upward and downward, and is coupled to the lower part of the seat cushion 7.

The four rotation shaft units 17 are arranged at a front left part, a front right part, a rear left part, and a rear right part between the lower plate 15 and the upper plate 16. Each rotating shaft unit 17 includes a lower rail 21 , an upper rail 22 , a lower slider 23 , an upper slider 24 , a lower regulating member 25 , and an upper regulating member 26 .

The lower rail 21 is coupled to the upper surface of the lower plate 15 and extends in a first horizontal direction. The lower rail 21 is fixed to the floor 2 via the lower plate 15 and the slide device 3. The upper rail 22 is coupled to the upper plate 16 and horizontally extends in a second direction different from the extending direction (first direction) of the lower rail 21. The upper rail 22 is fixed to the seat cushion 7 via the upper plate 16. In this embodiment, the first direction in which the lower rail 21 extends is the front-rear direction, and the second direction in which the upper rail 22 extends is the left-right direction (vehicle width direction) orthogonal to the first direction. be. The upper rail 22 is arranged above the lower rail 21. When viewed from above, the upper rail 22 is arranged at a position intersecting the lower rail 21.

The lower rail 21 includes a lower rail lower wall 21A coupled to the lower plate 15, a pair of lower rail side walls 21B that protrude upward from both side edges of the lower rail lower wall 21A, and an upper end of each lower rail side wall 21B. It has a pair of lower rail upper walls 21C that protrude toward each other. The lower rail lower wall 21A, the pair of lower rail side walls 21B, and the pair of lower rail upper walls 21C extend in the first direction, and a lower rail slit 21D extending in the first direction is formed between the pair of lower rail upper walls 21C. There is.

The upper rail 22 includes an upper rail upper wall 22A coupled to the upper plate 16, a pair of upper rail side walls 22B protruding downward from both side edges of the upper rail upper wall 22A, and a lower end of each upper rail side wall 22B. It has a pair of upper rail lower walls 22C that protrude toward each other. The upper rail upper wall 22A, the pair of upper rail side walls 22B, and the pair of upper rail lower walls 22C extend in the second direction, and an upper rail slit 22D extending in the second direction is formed between the pair of upper rail lower walls 22C. There is.

The lower slider 23 passes through the lower rail slit 21D and is locked to the edges of the pair of lower rail upper walls 21C. The lower slider 23 is restricted from moving up and down by coming into contact with the lower rail upper wall 21C, but can slide in the extending direction of the lower rail 21 by moving within the lower rail slit 21D. .

The upper slider 24 passes through the upper rail slit 22D and is locked to the edges of the pair of upper rail lower walls 22C. The upper slider 24 is restricted from moving up and down by coming into contact with the upper rail lower wall 22C, but can slide in the extending direction of the upper rail 22 by moving within the upper rail slit 22D. .

A shaft portion 23A that projects vertically upward is formed at the upper end of the lower slider 23, and a bearing hole 24A having a circular cross section and recessed vertically upward is formed at the lower end of the upper slider 24. The shaft portion 23A and the bearing hole 24A are provided with a known slip-out prevention means such as a C-ring. By rotatably receiving the shaft portion 23A in the bearing hole 24A, the lower slider 23 and the upper slider 24 are rotatably coupled to each other about an axis extending in the vertical direction. The rotation axes of the lower slider 23 and the upper slider 24 are defined as rotation axes A (A1, A2, A3, A4) of the rotation shaft unit 17.

The lower regulating member 25 includes a lower engaging member 31 disposed inside the lower rail 21 between the lower end of the lower slider 23 and the lower rail lower wall 21A, and a lower engaging member 31 disposed between the lower engaging member 31 and the lower rail lower wall 21A. A lower urging member 32 is interposed between the lower engaging members 31 and urges the lower engaging member 31 toward the lower slider 23; It has a lower actuator 33 that moves the mating member 31 toward the lower rail lower wall 21A side. The upper regulating member 26 includes an upper engaging member 35 disposed inside the upper rail 22 between the upper end of the upper slider 24 and the upper rail upper wall 22A, and an upper engaging member 35 arranged between the upper engaging member 35 and the upper rail upper wall 22A. An upper urging member 36 is interposed between the upper engaging member 35 and urges the upper engaging member 35 toward the upper slider 24; It has an upper actuator 37 that moves the mating member 35 toward the upper rail upper wall 22A side. The lower biasing member 32 and the upper biasing member 36 may be compression coil springs or leaf springs.

The lower engaging member 31 restricts movement of the lower slider 23 with respect to the lower rail 21 by engaging with the lower surface of the lower slider 23 . Teeth that engage with each other may be formed on the contact surfaces of the lower engaging member 31 and the lower slider 23. The configurations of the upper engaging member 35 and the upper slider 24 are similar to those of the lower engaging member 31 and the lower slider 23.

The lower actuator 33 and the upper actuator 37 may be, for example, solenoids. The lower actuator 33 has a main body 33A coupled to the lower plate 15, and a drive shaft 33B that passes from the main body 33A through the lower rail lower wall 21A and is coupled to the lower engagement member 31. The upper actuator 37 has a main body 37A coupled to the upper plate 16, and a drive shaft 37B that passes through the upper rail upper wall 22A from the main body 37A and is coupled to the upper engagement member 35.

When the rotation shaft unit 17 is in the locked state, the lower actuator 33 is not driven, and the lower engaging member 31 urged by the lower urging member 32 engages with the lower slider 23, causing the lower slider 23 to move against the lower rail 21. Movement will be regulated. Further, the upper actuator 37 is not driven, and the upper engaging member 35 urged by the upper urging member 36 engages with the upper slider 24, so that movement of the upper slider 24 with respect to the upper rail 22 is restricted. At this time, the lower slider 23 and the upper slider 24 can rotate relative to each other about the rotation axis A.

When the rotation shaft unit 17 is in the unlocked state, the lower actuator 33 is driven, so that the lower engaging member 31 moves in a direction away from the lower slider 23 against the urging force of the lower urging member 32. 23 becomes movable relative to the lower rail 21. Further, by driving the upper actuator 37, the upper engaging member 35 moves in a direction away from the upper slider 24 against the urging force of the upper urging member 36, and the upper slider 24 becomes movable with respect to the upper rail 22. Become.

The rotation device 4 can fix the position of the upper plate 16 with respect to the lower plate 15 by locking all four rotation shaft units 17. The rotation device 4 locks one rotation axis unit 17 selected from the four rotation axis units 17 and unlocks the other three rotation axis units 17, thereby allowing the selected rotation to occur. The upper plate 16 can rotate relative to the lower plate 15 around the rotation axis A of the moving shaft unit 17. By bringing all four rotation shaft units 17 into the unlocked state, horizontal displacement and rotation of the upper plate 16 relative to the lower plate 15 becomes possible.

As shown in FIG. 4, the seat 1 has a control device 40. As shown in FIG. The control device 40 is an electronic control device including a CPU, memory, and driver. Connected to the control device 40 are an inner rotation switch 41 and an outer rotation switch 42 for the occupant to select the rotation direction of the seat 1, and each actuator 33, 37 of the four rotation axis units 17. . Here, internal rotation refers to the front end of the seat cushion 7 rotating inward in the vehicle width direction from the initial position, and external rotation refers to the front end of the seat cushion 7 rotating outward in the vehicle width direction from the initial position. It means to turn towards the target.

The inner rotation switch 41 and the outer rotation switch 42 output an ON signal to the control device 40 while being operated by the occupant. The inner rotation switch 41 and the outer rotation switch 42 are provided on the side surface of the seat cushion 7. The control device 40 independently locks or unlocks the four rotating shaft units 17 by controlling the drive of each actuator 33, 37 of the four rotating shaft units 17.

The control device 40 controls four times when neither the inner rotation switch 41 nor the outer rotation switch 42 is operated, when the inner rotation switch 41 is operated, and when the outer rotation switch 42 is operated. The locked state and unlocked state of the two rotating shaft units 17 are changed.

In this embodiment, when the control device 40 does not receive an ON signal from either the inner rotation switch 41 or the outer rotation switch 42, the control device 40 locks all rotation shaft units 17. As a result, rotation of the rotation device 4 is restricted, and the seat cushion 7 cannot be displaced with respect to the floor 2.

Further, while receiving the ON signal from the inner rotation switch 41, the control device 40 locks the rear left rotation axis unit 17, and the remaining front left, front right, and rear right rotation axis units 17. to the unlocked state. As a result, the rotation device 4 can rotate about the rotation axis A3 of the rear left rotation axis unit 17, and the seat cushion 7 can be rotated about the rotation axis A3 of the rear left rotation axis unit 17 with respect to the floor 2. can be rotated about a rotation axis A3.

Further, while receiving the ON signal from the external rotation switch 42, the control device 40 locks the front right rotation axis unit 17, and the remaining front left, rear left, and rear right rotation axis units 17. to the unlocked state. Thereby, the rotation device 4 can rotate around the rotation axis A2 of the front right rotation axis unit 17, and the seat cushion 7 can be rotated about the rotation axis A2 of the front right rotation axis unit 17 with respect to the floor 2. can be rotated about a rotation axis A2.

The rotation axis A, which is the center of rotation of the seat 1, changes depending on whether the inner rotation switch 41 is operated or the outer rotation switch 42 is operated. That is, depending on the rotation direction of the seat 1, the rotation axis A that allows the rotation can be selected.

As shown in FIG. 5, when the inner rotation switch 41 is operated, the seat cushion 7 rotates about the rotation axis A3 of the rear left rotation axis unit 17, thereby causing the seat back 8 and the seat 1 to rotate. Contact with the compartment side wall 45 located on the side of the vehicle can be avoided. When the seat 1 is a driver's seat provided in the front right part of the vehicle interior, the vehicle interior side wall 45 is constituted by a door, a pillar, etc. located on the right side of the seat 1. When the seat body 5 rotates inwardly, the rotation axis A is selected to be the rotation axis A3 (or A4) located on the rear side of the center of the seat cushion 7, so that the seat body 5 and the passenger compartment side wall are rotated. 45 can be avoided. Further, when the seat body 5 rotates inwardly, it is more preferable that the rotation axis A3 is selected as the rotation axis A, which is located on the rear side of the center of the seat cushion 7 and on the inside in the vehicle width direction.

When the external rotation switch 42 is operated, the seat cushion 7 rotates about the rotation axis A2 of the front right rotation axis unit 17, thereby bringing the front end of the seat cushion 7 into contact with the vehicle interior side wall 45. can be avoided. When the seat body 5 rotates outward, the rotation axis A2 (or A1) located in front of the center of the seat cushion 7 is selected, so that the seat body 5 and the passenger compartment side wall 45 are rotated. contact can be avoided.

(Second embodiment)
The seat 50 according to the second embodiment differs in the configuration of the rotating device 51 compared to the seat 1 according to the first embodiment. As shown in FIGS. 6 and 7, the rotation device 51 includes a first plate 52, a second plate 53, and a third plate 54 arranged vertically, and a first plate 52 and a second plate extending vertically. 53, a second rotation shaft 56 extending vertically and rotatably connecting the second plate 53 and the third plate 54, and the first plate 52 and the second plate 53. 53, and a second rotation restriction device 58 provided between the second plate 53 and the third plate 54.

The first rotation shaft 55 is arranged at the front part of the rotation device 4 (the part in front of the center in the front-back direction), and the second rotation shaft 56 is arranged at the rear part of the rotation device 4 (the part behind the center in the front-rear direction). part). Furthermore, the first rotation shaft 55 may be arranged inward of the vehicle interior than the center of the rotation device 4 in the vehicle width direction, and the second rotation shaft 56 may be disposed within the vehicle width direction of the rotation device 4. It may be arranged outside the vehicle interior with respect to the center in the direction.

The first rotation restriction device 57 and the second rotation restriction device 58 are connected to and controlled by the control device 40 . The first rotation restriction device 57 is a device that selectively restricts the relative rotation between the first plate 52 and the second plate 53, and the second rotation restriction device 58 is a device that selectively restricts the relative rotation between the second plate 53 and the third plate 54. This is a device that selectively restricts rotation. The first rotation restriction device 57 and the second rotation restriction device 58 may have, for example, a solenoid and a connecting pin that moves forward and backward by the solenoid, and the adjacent plates may be connected by the connecting pin. Further, the first rotation restriction device 57 and the second rotation restriction device 58 are electromagnetic clutches, and may connect adjacent plates by magnetic force.

When receiving the ON signal from the internal rotation switch 41, the control device 40 locks the first rotation restriction device 57 and unlocks the second rotation restriction device 58. As a result, rotation about the first rotation axis 55 (rotation axis A5) is restricted, and rotation about the second rotation axis 56 (rotation axis A6) is enabled. Further, when receiving an ON signal from the external rotation switch 42, the control device 40 locks the second rotation restriction device 58 and places the first rotation restriction device 57 in an unlocked state. As a result, rotation of the rotation device 51 around the second rotation axis 56 (rotation axis A6) is restricted, and rotation around the first rotation axis 55 (rotation axis A5) is restricted. It becomes possible. Further, the control device 40 locks the first rotation restriction device 57 and the second rotation restriction device 58 when an ON signal is not received from either the internal rotation switch 41 or the external rotation switch 42. . This restricts the rotation of the rotation device 51.

In this embodiment, the rotating device 51 includes three rotating members, the first to third plates 52 to 54, but in other embodiments, the number of rotating members may be four or more. . Then, it is preferable to connect each of the adjacent rotating members with a rotating shaft and a rotation regulating device. With this configuration, the number of selectable rotation axes of the rotation device 51 can be increased.

(Third embodiment)
The seat 70 according to the third embodiment differs from the seat 1 according to the first embodiment in the configuration of the rotation device 71 and the arrangement of the slide device 3 and the rotation device 71. As shown in FIG. 8, the rotation device 71 is rotatably provided on the lower movement member 72 provided on the floor 2 and the lower movement member 72 about a rotation axis A7 extending in a substantially vertical direction. It has an upper moving member 73. The lower moving member 72 and the upper moving member 73 are formed into plate shapes with surfaces facing up and down. The rotation axis A7 of the rotation device 71 is arranged approximately at the center of the rotation device 71 in plan view. Each lower slide rail 12 of the slide device 3 is provided on the upper surface of the upper moving member 73. A seat cushion 7 is provided at the upper end of each upper slide rail 13. Each slide rail 11 is arranged in the front and rear in an initial state.

As shown in FIG. 9, a rotation direction regulating device 74 is provided between the upper moving member 73 and the seat cushion. The rotation direction regulating device 74 includes a regulating wall 75 provided on the upper surface of the upper moving member 73, and a front stopper 76 and a rear stopper 77 that protrude downward from the lower surface of the seat cushion 7. The regulating wall 75 extends back and forth in the radial direction centering on the rotation axis A7. The front stopper 76 is provided at the front end of the lower surface of the seat cushion 7, and the rear stopper 77 is provided at the rear end of the lower surface of the seat cushion 7. The front stopper 76 and the rear stopper 77 are arranged inward of the regulating wall 75 in the vehicle width direction. The length of the regulating wall 75 in the front-rear direction is shorter than the distance between the front stopper 76 and the rear stopper 77.

In the seat 70, the seat body 5 can be slid relative to the rotation device 71 by the slide device 3. Therefore, the relative position between the rotation axis A7 of the rotation device 71 and the seat body 5 changes. As shown in FIG. 9A, by arranging the seat main body 5 rearwardly with respect to the rotation device 71 using the slide device 3, the rotation axis A7 can be arranged on the front side of the seat main body 5. At this time, a front stopper 76 is disposed inwardly in the vehicle width direction at the front end of the restriction wall 75, and the front end of the restriction wall 75 and the front stopper 76 come into contact with each other, thereby restricting the inward rotation of the seat cushion 7. Thereby, the seat cushion 7 can only be rotated outwardly.

As shown in FIG. 9(B), by arranging the seat main body 5 in front of the rotation device 71 using the slide device 3, the rotation axis A7 can be arranged on the rear side of the seat main body 5. At this time, a rear stopper 77 is arranged inward in the vehicle width direction at the rear end of the restriction wall 75, and the rear end of the restriction wall 75 and the rear stopper 77 come into contact, thereby restricting the outward rotation of the seat cushion 7. . This allows the seat cushion 7 to rotate only inwardly. In this way, the rotational direction of the upper moving member 73 relative to the lower moving member 72 is regulated depending on the position of the upper slide rail 13 relative to the lower slide rail 12.

Although the description of the specific embodiments has been completed above, the present invention is not limited to the above-mentioned embodiments and can be widely modified and implemented. The configurations of the rotation devices 4, 51, and 71 described above are merely examples, and the present invention is not limited thereto. The rotation device may be of any type as long as it enables rotation around one rotation axis selected from a plurality of rotation axes and restricts rotation around the remaining rotation axes. structure can be applied.

1, 50, 70: Seat 2: Floor 3: Slide device 4, 51, 71: Rotating device 7: Seat cushion 8: Seat back 11: Slide rail 12: Lower slide rail 13: Upper slide rail 15: Lower plate 16 : Upper plate 17 : Rotating shaft unit 21 : Lower rail 22 : Upper rail 23 : Lower slider 24 : Upper slider 25 : Lower regulating member 26 : Upper regulating member 31 : Lower engaging member 32 : Lower biasing member 33 : Lower Actuator 35 : Upper engaging member 36 : Upper biasing member 37 : Upper actuator 40 : Control device 41 : Inner rotation switch 42 : Outer rotation switch 45 : Interior side wall 52 : First plate 53 : Second plate 54 : Third plate 55 : First rotation shaft 56 : Second rotation shaft 57 : First rotation restriction device 58 : Second rotation restriction device 72 : Lower movement member 73 : Upper movement member 74 : Rotation direction Regulating device A (A1 to A7): Rotation axis

Claims (9)

A vehicle seat comprising a seat cushion provided on a floor of the vehicle and a seat back provided on the seat cushion,
The seat cushion is provided between the floor and the seat cushion, and enables the seat cushion to rotate about one rotation axis selected from a plurality of rotation axes extending substantially vertically, and a rotation device that restricts rotation of the seat cushion around a rotation axis;
a control device that controls the rotation device;
a switch connected to the control device and used by an occupant to select a rotation direction;
The rotation device has a plurality of rotation shaft units,
Each of the plurality of rotation axis units is
a lower rail fixed to the floor and extending in a first horizontal direction;
an upper rail fixed to the seat cushion and extending horizontally in a second direction different from the first direction;
a lower slider slidably provided on the lower rail;
an upper slider that is slidably provided on the upper rail and rotatably coupled to the lower slider about an axis extending in a substantially vertical direction;
a regulating member that switches the rotation shaft unit between a locked state and an unlocked state by selectively regulating movement of the lower slider relative to the lower rail and movement of the upper slider relative to the upper rail;
an actuator that drives the regulating member;
The control device switches between the locked state and the unlocked state of the plurality of rotation axis units by controlling the actuator based on a signal from the switch, and selects the rotation axis serving as a rotation center. vehicle seat. A slide device is provided on the upper surface of the floor,
The vehicle seat according to claim 1, wherein the rotation device is provided at an upper part of the slide device. The rotation device has a lower plate and an upper plate that are vertically opposed to each other,
The plurality of rotation shaft units are interposed between the lower plate and the upper plate,
the lower plate is coupled to an upper part of the slide device;
3. The vehicle seat of claim 2, wherein the upper plate is coupled to a lower portion of the seat cushion. The vehicle seat according to claim 3, wherein the plurality of rotation shaft units are arranged at a front left part, a front right part, a rear left part, and a rear right part between the lower plate and the upper plate. the switch includes an internal rotation switch;
The control device places the rear left rotation axis unit in the locked state and unlocks the front left, front right, and rear right rotation axis units when the inner rotation switch is operated. 5. The vehicle seat according to claim 4, wherein the vehicle seat is in the state of the switch includes an external rotation switch;
The control device places the front right rotation axis unit in the locked state and unlocks the front left, rear left, and rear right rotation axis units when the external rotation switch is operated. 5. The vehicle seat according to claim 4, wherein the vehicle seat is in the state of The regulating member is interposed between a lower engaging member disposed between the lower slider and the lower rail, and between the lower engaging member and the lower rail, and the regulating member is disposed between the lower engaging member and the lower rail. and a lower biasing member biasing toward the slider,
The vehicle seat according to claim 1, wherein the actuator is coupled to the lower engaging member and moves the lower engaging member toward the lower rail against the urging force of the lower urging member. The regulating member is interposed between an upper engaging member disposed between the upper slider and the upper rail, and between the upper engaging member and the upper rail, and the regulating member is disposed between the upper engaging member and the upper rail. an upper biasing member biasing toward the slider;
The vehicle seat according to claim 1, wherein the actuator is coupled to the upper engaging member and moves the upper engaging member toward the upper rail against the urging force of the upper urging member. A shaft portion protruding vertically upward is formed at the upper end of the lower slider, and a bearing hole having a circular cross section and recessed vertically upward is formed at the lower end of the upper slider,
The vehicle seat according to claim 1, wherein the shaft portion is rotatably received in the bearing hole.

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