Seat rotation device

Abstract

To provide a seat rotation device allowing relatively easy design of a guide rail and a support slider while securing rigidity of a base plate.SOLUTION: A seat rotation device 10 includes: a base plate 100; a rotary plate 200; and a connection unit. The connection unit has a rotary link 310 having a fixed end and a rotary end 312, a guide rail 340 which is fixed to the base plate and has a shape extending linearly, a support slider 350 which is movable along the guide rail and for supporting the rotary end 312, a connection member 360 which connects the support slider and the rotary link, a lower rail 321, and an upper slider 322. The connection member 360 has a configuration which can absorb a difference in distance between the rotary end 312 and the support slider 350, which is generated when the rotary end and the support slider move with respect to the base plate.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a seat rotation device. [Background technology]

[0002] Conventionally, seat rotation devices capable of rotating a seat body between a seating position and a boarding / exiting position have been known. For example, Japanese Patent Application Laid-Open Publication No. 2022-78502 discloses a seat rotation device including a base plate, a rotating plate, and a connecting unit. The base plate is fixed to the floor of the vehicle. The rotating plate is fixed to the underside of the seat body. The connecting unit connects the base plate and the rotating plate so that the rotating plate can rotate relative to the base plate between the seating position and the boarding / exiting position. The connecting unit includes a link. The link has a rotating end portion that can rotate around its fixed end portion. The base plate has a through hole formed therein for guiding movement of the rotating end portion. The through hole is formed in an arc shape corresponding to the movement trajectory of the rotating end portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-78502 Summary of the Invention [Problem to be solved by the invention]

[0004] In the seat rotation device described in JP 2022-78502 A, an arc-shaped through hole is formed in the base plate, which raises concerns about a reduction in the rigidity of the base plate. Therefore, as a means for guiding the movement of the rotating end, it is conceivable to provide an arc-shaped guide rail on the upper surface of the base plate and support the rotating end with a slider that can move along the guide rail. However, this structure requires accurate calculation of the guide rail's trajectory, and precision machining of the guide rail and slider to ensure smooth movement of the slider along the guide rail.

[0005] An object of the present invention is to provide a seat rotation device in which the guide rails and support sliders can be designed relatively simply while ensuring the rigidity of the base plate. [Means for solving the problem]

[0006] A seat rotation device according to one aspect of the present invention is a seat rotation device capable of rotating a seat body between a seating position where the seat body faces the front of the vehicle and a boarding / exiting position where the seat body faces an opening of a door of the vehicle, the seat rotation device comprising: a base plate fixed to a floor of the vehicle; a rotating plate fixed to an underside of the seat body so as not to rotate relative to the seat body; and a connection unit connecting the base plate and the rotating plate so that the rotating plate can rotate relative to the base plate between the seating position and the boarding / exiting position, the connection unit being a rotating link connecting the base plate and the rotating plate, the rotating link having a fixed end fixed to the base plate so as to be rotatable relative to the base plate, and a rotating end fixed to the rotating plate so as to be rotatable relative to the base plate around the fixed end as a rotation center; and a connecting unit fixed to the base plate and having a shape extending linearly. a guide rail for supporting the rotating end portion of the seat; a support slider movable along the guide rail for supporting the rotating end portion; a connecting member connecting the support slider and the rotating link such that the rotating end portion is rotatable relative to the connecting member; a lower rail fixed to the base plate; and an upper slider movable along the lower rail for supporting the rotating plate such that the rotating plate is rotatable relative to the upper slider, wherein the rotating plate has a first supported portion supported by the rotating end portion and a second supported portion spaced apart from the first supported portion and supported by the upper slider, wherein the upper slider moves the second supported portion along the lower rail while rotating the rotating plate relative to the upper slider in the same direction as the direction in which the rotating plate rotates relative to the rotating end portion when the rotating plate moves from the seating position to the getting-in / out position, and the connecting memberThe structure is capable of absorbing a difference in distance between the rotating end portion and the support slider that occurs when the rotating end portion and the support slider move relative to the base plate. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a seat rotation device in which the guide rail and the support slider can be designed relatively simply while ensuring the rigidity of the base plate. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a perspective view of the swivel seat in a seated position. [Figure 2] FIG. 2 is a perspective view of the swivel seat in the entry / exit position. [Figure 3] 1 is a perspective view of a seat rotation device according to a first embodiment of the present invention in a seated position. [Figure 4] FIG. 2 is a perspective view of the seat rotation device in the entry / exit position. [Figure 5] 10A and 10B are diagrams showing the positional relationship between a base plate, a rotating plate, and a connecting unit in a seating position and a getting-in / out position. [Figure 6] 10A and 10B are diagrams for explaining the relationship between the inclination of the fixed shaft portion and the seat surface. [Figure 7] 10A and 10B are diagrams for explaining the relationship between the inclination of the fixed shaft portion and the seat surface. [Figure 8] FIG. 2 is an exploded perspective view of a rotary link, a guide rail, a support slider, and a connecting member. [Figure 9] 10A and 10B are diagrams for explaining the positional relationship between the movement locus of the support shaft portion at the rotation end portion and the connecting member. [Figure 10] 10 is an exploded perspective view of a rotation link, a guide rail, a support slider, and a connecting member of a seat rotation device according to a second embodiment of the present invention. FIG. [Figure 11] 10A and 10B are diagrams for explaining the positional relationship between the movement locus of the support shaft portion at the rotation end portion and the connecting member. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the accompanying drawings, in which the same or corresponding components are designated by the same reference numerals.

[0010] (First embodiment) Fig. 1 is a perspective view of a swivel seat in a seating position. Fig. 2 is a perspective view of the swivel seat in a boarding / exiting position. The swivel seat 1 functions as a vehicle seat, particularly as a car seat.

[0011] As shown in FIGS. 1 and 2, a swivel seat 1 of this embodiment includes a seat body 2 and a seat rotation device 10.

[0012] The seat body 2 has a seat cushion 2a and a seat back 2b. The seat cushion 2a forms a seat portion. The seat back 2b supports the back of an occupant seated on the seat cushion 2a. The seat body 2 is disposed on a floor FL of the vehicle.

[0013] A pair of seat sliders 3 are attached to the floor FL to slide the seat body 2 relative to the floor FL in the front-to-rear direction of the vehicle. The pair of seat sliders 3 are spaced apart in the width direction of the vehicle. Each seat slider 3 has a lower rail 3a and an upper rail 3b.

[0014] The lower rails 3a are fixed to the floor FL in a position parallel to the front-rear direction of the vehicle. The upper rails 3b are displaceable relative to the lower rails 3a in the front-rear direction of the vehicle (longitudinal direction of the lower rails 3a).

[0015] The seat rotation device 10 is capable of rotating the seat body 2 between a seating position (position shown in FIG. 1) and an entry / exit position (position shown in FIG. 2). The seating position is a position where the seat body 2 faces the front of the vehicle. The entry / exit position is a position where the seat body 2 faces the opening of the vehicle door. The seat rotation device 10 is fixed to the underside of the seat body 2.

[0016] Fig. 3 is a perspective view of the seat rotation device in the first embodiment of the present invention in the seating position, and Fig. 4 is a perspective view of the seat rotation device in the getting-in / out position.

[0017] As shown in FIGS. 3 and 4, the seat rotation device 10 includes a base plate 100, a rotation plate 200, a connecting unit 300, a drive unit 400, and a lock unit 500.

[0018] The base plate 100 is fixed to the floor FL of the vehicle directly or indirectly via another member. In this embodiment, the base plate 100 is fixed to the upper rail 3b. That is, the base plate 100 is fixed to the floor FL via the seat slider 3.

[0019] The rotating plate 200 is fixed to the underside of the seat body 2 so as not to rotate relative to the seat body 2. As shown in Figures 3 and 4, the rotating plate 200 has a pair of side brackets 210, a rear pipe 220, a front pipe 230, a connecting plate 240, and a striker 250.

[0020] The pair of side brackets 210 are arranged with a gap in the width direction. Each side bracket 210 is arranged above the seat slider 3. Each side bracket 210 has a shape that extends in the front-to-rear direction. Of the pair of side brackets 210, the side bracket 210 arranged on the left side in the width direction has a seat belt anchor (not shown) fixed to the rear portion thereof by a fixing bolt B.

[0021] The rear pipe 220 connects the rear portions of the pair of side brackets 210 together.

[0022] The front pipe 230 connects the front portions of the pair of side brackets 210 together.

[0023] The connecting plate 240 connects the rear pipe 220 and the front pipe 230 together.

[0024] 3 and 4, the striker 250 is fixed to the rear end of the connecting plate 240. The striker 250 is fixed to the connecting plate 240 in a state in which it straddles the inner end of the rear pipe 220 in the width direction.

[0025] The connecting unit 300 connects the base plate 100 and the rotating plate 200 so that the rotating plate 200 can rotate relative to the base plate 100 between the seating position and the getting-on / off position.

[0026] The connecting unit 300 includes a rotating link 310 , a main slider 320 , a sub-slider 330 , a guide rail 340 , a support slider 350 , and a connecting member 360 .

[0027] The rotation link 310 connects the base plate 100 and the rotation plate 200. The rotation link 310 has a fixed end 311 (see FIG. 5) and a rotating end 312.

[0028] The fixed end 311 is formed at one end of the rotation link 310. The fixed end 311 is fixed to the base plate 100 so as to be rotatable relative to the base plate 100. Specifically, the fixed end 311 is fixed from the back side of the base plate 100 by a fastening member. The fixed end 311 is rotatable around a fixed shaft portion 311a, which is the central axis of the fastening member.

[0029] The rotating end 312 is formed at the other end of the rotating link 310. The rotating end 312 is rotatable relative to the base plate 100 around the fixed shaft portion 311a of the fixed end 311 as the center of rotation, and is fixed to the rotating plate 200 so as to be rotatable relative to the rotating plate 200. Specifically, the rotating end 312 is fixed to the rotating plate 200 by a support shaft portion 312a and a fastening member F2. The support shaft portion 312a is formed by a bolt, and the fastening member F2 is formed by a nut. The rotating plate 200 is rotatable relative to the rotating end 312 around the support shaft portion 312a. Hereinafter, the portion of the rotating plate 200 supported by the support shaft portion 312a will be referred to as the "first supported portion 201" (see Figures 3 and 4).

[0030] The main slider 320 includes a lower rail 321 and an upper slider 322 .

[0031] The lower rail 321 is fixed to the base plate 100. Specifically, the lower rail 321 is fixed to a central portion of the base plate 100. The lower rail 321 has a shape that extends linearly. The lower rail 321 has a shape that extends linearly along the diameter of an imaginary circle A1 (see FIG. 5) whose radius is twice the length of the distance between the fixed shaft portion 311a at the fixed end portion 311 and the support shaft portion 312a at the rotating end portion 312 and whose center is the fixed shaft portion 311a. Note that in FIG. 5, the imaginary circle A1 and a circle A2 whose radius is the length between the fixed shaft portion 311a and the support shaft portion 312a and whose center is the support shaft portion 312a are indicated by dashed dotted lines, and the rotating plate 200 is indicated by a dashed two-dotted line. Also, a vehicle entrance / exit is provided at the top of FIG. 5.

[0032] 5, the lower rail 321 has a shape that extends linearly in a direction that intersects with the front-rear direction of the vehicle and along the diameter of the imaginary circle A1. The lower rail 321 is inclined with respect to the front-rear direction so as to gradually approach the door opening as it moves toward the front of the vehicle.

[0033] The upper slider 322 is movable along the lower rail 321. The upper slider 322 supports the rotating plate 200 so that the rotating plate 200 is rotatable relative to the upper slider 322. Specifically, the upper slider 322 is fixed to the rotating plate 200 by a fastening member F3. The rotating plate 200 is rotatable relative to the upper slider 322 around a support shaft portion 322a, which is the central axis of the fastening member F3. The support shaft portion 322a is formed by a bolt. Hereinafter, the portion of the rotating plate 200 supported by the support shaft portion 322a will be referred to as the "second supported portion 202" (see Figures 3 and 4).

[0034] The upper slider 322 moves the second supported portion 202 of the rotating plate 200 along the lower rail 321 while rotating it relative to the upper slider 322 in the same direction (clockwise in Figure 5) in which the rotating plate 200 rotates relative to the rotating end portion 312 when the rotating plate 200 moves from the seating position to the boarding / disembarking position.

[0035] When the seat body 2 moves between the seating position and the boarding / disembarking position, the support shaft portion 322a of the upper slider 322 moves along the locus of a point on the circle A2 (the diameter of the imaginary circle A1) when the circle A2 rotates while being inscribed in the imaginary circle A1.

[0036] The sub-slider 330 includes a lower rail 331 and an upper slider 332 .

[0037] The lower rail 331 is fixed to the base plate 100. Specifically, the lower rail 331 is fixed to a portion of the base plate 100 located between the seat slider 3, which is arranged on the inner side in the width direction of the base plate 100, and the lower rail 321 of the main slider 320. The lower rail 331 has a shape that extends linearly. As shown in FIG. 5 , the lower rail 331 is fixed to the base plate 100 in an orientation such that an extension line of the lower rail 331 does not pass through the fixed shaft portion 311a, which is the center of the imaginary circle A1. The lower rail 331 is inclined with respect to the front-to-rear direction so as to gradually approach the door opening as it approaches the front of the vehicle.

[0038] The upper slider 332 is movable along the lower rail 331. The upper slider 332 supports the rotation plate 200 so that the rotation plate 200 is rotatable relative to the upper slider 332. Specifically, the upper slider 332 is fixed to the rotation plate 200 by a fastening member (not shown). The rotation plate 200 is rotatable relative to the upper slider 332 around a support shaft portion 332a (see FIG. 5), which is the central axis of the fastening member. Hereinafter, the portion of the rotation plate 200 supported by the support shaft portion 332a will be referred to as the "third supported portion."

[0039] The upper slider 322 moves the third supported portion of the rotating plate 200 along the lower rail 331 while rotating it relative to the upper slider 332 in the same direction (clockwise in Figure 5) in which the rotating plate 200 rotates relative to the rotating end portion 312 when the rotating plate 200 moves from the seating position to the boarding / disembarking position.

[0040] As shown in FIGS. 6 and 7, an extension line AX11 of the fixed shaft portion 311a of the fixed end portion 311 of the rotating link 310 is inclined with respect to a reference axis AX10 that is parallel to a direction perpendicular to the bottom surface of the lower rail 3a of the seat slider 3. As a result, the seat surface S2 of the seat cushion 2a in the ingress / egress position is inclined downward as it moves forward. Furthermore, this seat surface S2 is inclined gradually downward as it moves closer to the vehicle door opening (in this embodiment, as it moves toward the right side as seen from the passenger seated on the seat cushion 2a). This makes it easier for the passenger to get in and out of the seat at the ingress / egress position. In FIGS. 6 and 7, the seat surface S1 of the seat cushion 2a in the sitting position is indicated by a solid line, and the seat surface S2 of the seat cushion 2a in the ingress / egress position is indicated by a two-dot chain line.

[0041] The drive unit 400 drives the connection unit 300. The drive unit 400 is fixed to the base plate 100. The drive unit 400 can rotate the rotation link 310 around the fixed end 311. The drive unit 400 includes a motor 410 and a gear 420 that transmits the output of the motor 410 to the rotation link 310.

[0042] For example, when the motor 410 is driven while the rotating plate 200 is in the seating position, the rotating link 310 rotates about the fixed end 311, and the upper sliders 322, 332 move forward along the lower rails 321, 331. As a result, the rotating plate 200 rotates toward the boarding / alighting opening while moving forward relative to the base plate 100. As a result, the rotating plate 200 is positioned at the boarding / alighting position.

[0043] The lock unit 500 locks the rotating plate 200 in the seated position. As shown in Figures 3 and 4, the lock unit 500 is fixed to the base plate 100 by a fastening member F5. The lock unit 500 includes a locking device 510, a release actuator 520, and a transmission unit 530.

[0044] The locking device 510 can lock the striker 250. The locking device 510 includes a hook that is movable between a locked position and an unlocked position. The locked position is a position that holds the striker 250 in place when the rotating plate 200 is in the seated position. The unlocked position is a position that allows the striker 250 to be released.

[0045] The release actuator 520 is configured as a separate member from the locking device 510. The release actuator 520 is a device for releasing the lock of the striker 250 by the locking device 510.

[0046] The transmission unit 530 transmits the output of the release actuator 520 to the locking device 510. The transmission unit 530 includes a link mechanism.

[0047] The guide rail 340, the support slider 350, and the connecting member 360 will now be described in detail with reference to FIGS.

[0048] The guide rail 340 is fixed to the base plate 100. The guide rail 340 has a shape that extends linearly. The guide rail 340 is open upward. The guide rail 340 is disposed near the rotating end 312 of the rotating link 310. More specifically, as shown in FIG. 9 , the guide rail 340 is disposed below the movement trajectory T of the rotating end 312 and at a position that overlaps with the movement trajectory T.

[0049] The support slider 350 is movable along the guide rail 340. The support slider 350 is a slider for supporting the rotating end portion 312. The support slider 350 has an upper rail 351, a roller 352, and a pair of support bolts 353.

[0050] The upper rail 351 has a shape that opens downward. The length of the upper rail 351 in a direction parallel to the longitudinal direction of the guide rail 340 is smaller than the length of the guide rail 340 in the same direction.

[0051] The rollers 352 are held by the upper rail 351. The rollers 352 rotate while contacting the inner surface of the guide rail 340.

[0052] Each support bolt 353 is fixed by welding or the like to the upper surface of the upper rail 351. Each support bolt 353 has a shape that extends upward from the upper surface of the upper rail 351. Each support bolt 353 is fixed to an end of the upper rail 351 in the longitudinal direction of the upper rail 351.

[0053] The connecting member 360 connects the support slider 350 and the rotating link 310. The connecting member 360 connects the support slider 350 and the rotating link 310 so that the rotating end 312 is rotatable relative to the connecting member 360. The connecting member 360 has a configuration that can absorb a difference in distance between the rotating end 312 and the support slider 350 that occurs when the rotating end 312 and the support slider 350 move with respect to the base plate 100. In this embodiment, the connecting member 360 has a bracket 361 and a coupling portion 362.

[0054] The bracket 361 is fixed to the support slider 350. Specifically, the bracket 361 is fixed to the upper rail 351 by a support bolt 353 and a nut N. The bracket 361 has an elongated hole 361h that has a shape that extends in a direction that intersects with the longitudinal direction of the guide rail 340. It is preferable that the elongated hole 361h be perpendicular to both the longitudinal direction and the up-down direction of the guide rail 340.

[0055] The connecting portion 362 is inserted into the elongated hole 361h and connects the rotating end portion 312 and the bracket 361. The connecting portion 362 is movable within the elongated hole 361h. The connecting portion 362 is fixed to the rotating end portion 312. The connecting portion 362 has a shape that extends downward from the rotating end portion 312. In this embodiment, the connecting portion 362 is formed by a bolt that is coaxial with the support shaft portion 312a. However, the connecting portion 362 may also be formed by a bolt that has a central axis that differs from the central axis of the support shaft portion 312a.

[0056] Fig. 9 shows the positional relationship between the movement trajectory T of the support shaft 312a at the rotating end 312 and the connecting member 360. In Fig. 9, the rotating link 310, the support shaft 312a, and the bracket 361 when the rotating plate 200 is in the seating position are shown by solid lines, and the rotating end 312, the support shaft 312a, and the bracket 361 when the rotating plate 200 is in the boarding / disembarking position and when it is in an intermediate position between the seating position and the boarding / disembarking position are shown by two-dot chain lines.

[0057] 9, when the rotating plate 200 is located at the seating position or the getting-on / off position, the support shaft 312a and the connecting portion 362 are located at one end side (lower side in FIG. 9) of the elongated hole 361h in the bracket 361, whereas when the rotating plate 200 is located at the intermediate position, the support shaft 312a and the connecting portion 362 are located at the other end side (upper side in FIG. 9) of the elongated hole 361h. In this way, the bracket 361 and the connecting portion 362 can absorb the difference in distance between the rotating end portion 312 and the support slider 350 that occurs when the rotating end portion 312 and the support slider 350 move relative to the base plate 100.

[0058] In the seat rotation device 10 described above, the rigidity of the base plate 100 is effectively ensured by fixing the guide rail 340 to the base plate 100. Furthermore, the connecting member 360 has a configuration that can absorb the difference in distance between the rotating end portion 312 and the support slider 350 that occurs when the rotating end portion 312 and the support slider 350 move relative to the base plate 100, and the guide rail 340 has a shape that extends linearly. This simplifies the design of the guide rail 340 and the support slider 350.

[0059] (Second embodiment) Next, a support slider 350 and a connecting member 360 of a seat rotation device 10 according to a second embodiment of the present invention will be described with reference to Figures 10 and 11. Note that in the second embodiment, only the parts that are different from the first embodiment will be described, and the same structure, action, and effect as those of the first embodiment will not be described repeatedly.

[0060] 10 and 11, in this embodiment, the support slider 350 has a single support bolt 353. The support bolt 353 is configured as a shoulder bolt, and is fixed to the top surface of the upper rail 351 by welding, caulking, or the like.

[0061] The connecting member 360 includes a link 363 and a connecting portion 362 .

[0062] The link 363 has a first end 363a and a second end 363b. The first end 363a is configured as one end of the link 363. The first end 363a is connected to the support slider 350 so as to be rotatable relative to the support slider 350. The first end 363a is fixed to the upper rail 351 by a support bolt 353 and a nut. The second end 363b is configured as the other end of the link 363. The second end 363b is rotatable around the first end 363a. The second end 363b is fixed to the rotating end 312 by a connecting portion 362 and a nut N so as to be rotatable relative to the rotating end 312. In other words, the connecting portion 362 connects the rotating end 312 and the second end 363b so that the second end 363b is rotatable relative to the rotating end 312.

[0063] 11 shows the positional relationship between the movement trajectory T of the support shaft portion 312a at the rotating end portion 312 and the connecting member 360. As shown in FIG. 11, when the rotating plate 200 is located at the seating position or the boarding / dismounting position, the support shaft portion 312a and the connecting portion 362 are located on the movement trajectory of the support bolt 353, whereas when the rotating plate 200 is located at the intermediate position, the support shaft portion 312a and the connecting portion 362 are separated from the movement trajectory of the support bolt 353 as the link 363 rotates around the first end portion 363a. In this way, the link 363 and the connecting portion 362 can absorb the difference in distance between the rotating end portion 312 and the support slider 350 that occurs when the rotating end portion 312 and the support slider 350 move relative to the base plate 100.

[0064] It will be appreciated by those skilled in the art that the exemplary embodiments described above are examples of the following aspects.

[0065] (Aspect 1) A seat rotation device capable of rotating a seat body between a seating position where the seat body faces the front of a vehicle and an entry / exit position where the seat body faces a door opening of the vehicle, a base plate fixed to the floor of the vehicle; a rotation plate fixed to the underside of the seat body so as not to rotate relative to the seat body; a connection unit that connects the base plate and the rotating plate so that the rotating plate can rotate relative to the base plate between the seating position and the getting-on / off position, The connection unit is a rotation link connecting the base plate and the rotation plate, the rotation link having a fixed end portion fixed to the base plate so as to be rotatable relative to the base plate, and a rotation end portion fixed to the rotation plate so as to be rotatable relative to the base plate around the fixed end portion as a rotation center; a guide rail fixed to the base plate and having a linear extending shape; a support slider that is movable along the guide rail and that supports the rotating end portion; a connecting member that connects the support slider and the rotation link so that the rotation end portion is rotatable relative to the connecting member; a lower rail fixed to the base plate; an upper slider that is movable along the lower rail and supports the rotating plate so that the rotating plate can rotate relative to the upper slider; The rotating plate is a first supported portion supported by the rotating end portion; a second supported portion that is spaced apart from the first supported portion and supported by the upper slider, the upper slider moves the second supported portion along the lower rail while rotating the rotating plate relative to the upper slider in the same direction as the direction in which the rotating plate rotates with respect to the rotating end portion when the rotating plate moves from the seating position to the getting-in / out position, A seat rotation device, wherein the connecting member has a configuration capable of absorbing a difference in distance between the rotating end portion and the support slider that occurs when the rotating end portion and the support slider move relative to the base plate.

[0066] In this seat rotation device, the guide rail is fixed to the base plate, effectively ensuring the rigidity of the base plate. Furthermore, the connecting member is configured to absorb the difference in distance between the rotating end and the support slider that occurs when the rotating end and the support slider move relative to the base plate, and the guide rail has a linear shape. This simplifies the design of the guide rail and support slider.

[0067] (Aspect 2) 2. The seat rotation device according to claim 1, wherein the guide rail is disposed below a movement path of the rotation end portion and overlaps with the movement path.

[0068] In this embodiment, the distance between the support slider and the rotating end is shortened, which allows the connecting member to be made smaller, and the load input to the rotating end is effectively borne by the guide rail.

[0069] (Aspect 3) The connecting member is a bracket having an elongated hole extending in a direction intersecting the longitudinal direction of the guide rail and fixed to the support slider; A seat rotation device according to aspect 1 or 2, further comprising: a connecting portion that is inserted into the elongated hole to connect the rotating end portion and the bracket, and that is capable of moving within the elongated hole.

[0070] (Aspect 4) The connecting member is a link having a first end connected to the support slider so as to be rotatable relative to the support slider, and a second end rotatable about the first end; a connecting portion that connects the rotating end portion and the second end portion so that the second end portion is rotatable relative to the rotating end portion.

[0071] It should be noted that the embodiments disclosed herein are illustrative in all respects and should not be considered limiting. The scope of the present invention is defined by the claims rather than the description of the above embodiments, and further includes all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0072] 1 swivel seat, 2 seat body, 3 seat slider, 10 seat rotation device, 100 base plate, 200 swivel plate, 210 side bracket, 220 rear pipe, 230 front pipe, 240 connecting plate, 250 striker, 300 connecting unit, 310 swivel link, 311 fixed end, 312 swivel end, 320 main slider, 321 lower rail, 322 upper slider, 330 sub-slider, 331 lower rail, 332 upper slider, 340 guide rail, 350 support slider, 360 connecting member, 361 bracket, 361h elongated hole, 362 connecting portion, 363 link, 363a first end, 363b second end, 400 drive unit, 410 motor, 420 gear, 500 lock unit, 510 Locking device, 520 release actuator, 530 transmission part, A1 virtual circle, A2 circle, FL floor, T movement trajectory.

Claims

1. A seat rotation device capable of rotating a seat body between a seating position where the seat body faces the front of a vehicle and an entry / exit position where the seat body faces a door opening of the vehicle, a base plate fixed to the floor of the vehicle; a rotation plate fixed to the underside of the seat body so as not to rotate relative to the seat body; a connection unit that connects the base plate and the rotating plate so that the rotating plate can rotate relative to the base plate between the seating position and the getting-on / off position, The connecting unit is a rotation link connecting the base plate and the rotation plate, the rotation link having a fixed end portion fixed to the base plate so as to be rotatable relative to the base plate, and a rotation end portion fixed to the rotation plate so as to be rotatable relative to the base plate around the fixed end portion as a rotation center; a guide rail fixed to the base plate and having a linear extending shape; a support slider that is movable along the guide rail and that supports the rotating end portion; a connecting member that connects the support slider and the rotation link so that the rotation end portion is rotatable relative to the connecting member; a lower rail fixed to the base plate; an upper slider that is movable along the lower rail and supports the rotating plate so that the rotating plate can rotate relative to the upper slider; The rotating plate is a first supported portion supported by the rotating end portion; a second supported portion that is spaced apart from the first supported portion and supported by the upper slider, the upper slider moves the second supported portion along the lower rail while rotating the rotating plate relative to the upper slider in the same direction as the direction in which the rotating plate rotates with respect to the rotating end portion when the rotating plate moves from the seating position to the getting-in / out position, A seat rotation device, wherein the connecting member has a configuration capable of absorbing a difference in distance between the rotating end portion and the support slider that occurs when the rotating end portion and the support slider move relative to the base plate.

2. The seat rotating device according to claim 1 , wherein the guide rail is disposed below a moving path of the rotating end portion so as to overlap the moving path.

3. The connecting member is a bracket having an elongated hole extending in a direction intersecting the longitudinal direction of the guide rail and fixed to the support slider; 3. The seat rotation device according to claim 1, further comprising: a connecting portion that is inserted into the elongated hole to connect the rotating end portion and the bracket, and that is movable within the elongated hole.

4. The connecting member is a link having a first end connected to the support slider so as to be rotatable relative to the support slider, and a second end rotatable about the first end; The seat rotation device according to claim 1 or 2, further comprising: a connecting portion that connects the rotating end portion and the second end portion so that the second end portion is rotatable relative to the rotating end portion.

Images