Seat rotation device

Abstract

To provide a seat rotating device that is able to achieve both prevention of floating of a rotating plate from a seat slider and forward / backward positioning of the rotating plate in a seating position.SOLUTION: A seat rotating device 10 includes: a seat slider 50 having a lower rail 51 and an upper rail 52; a base plate 100; a rotating plate 200 including a belt anchor bracket 210; a connecting unit 300; a restricting portion 700; a fixing member 800; and a load receiving portion 900. The restricting portion 700 includes: a facing portion 710 that faces a rear-end part of the belt anchor bracket in forward and backward directions when the rotating plate is in the seating position; and a claw portion 720 that is positioned above the rear-end part of the belt anchor bracket when the rotating plate is in the seating position.SELECTED DRAWING: Figure 5

Description

[Technical Field]

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

[0002] Conventionally, seat rotation devices capable of sliding a seat body in the fore-and-aft direction of a vehicle and rotating the seat body between a seating position and an entry / exit position have been known. For example, Japanese Patent Application Laid-Open Publication No. 2022-78502 discloses a seat rotation device including a seat slider, a base plate, a rotation plate, and a connecting unit. The seat slider has a lower rail fixed to the vehicle floor and an upper rail movable along the lower rail. The base plate is fixed to the upper rail. The rotation plate is fixed to the underside of the seat body. The connecting unit connects the base plate and the rotation plate so that the rotation plate can rotate relative to the base plate between the seating position and the entry / exit position. A belt anchor bracket for fixing a seat belt anchor is attached to the inner end of the rotation plate in the vehicle width direction. [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] The seat rotation device described in JP 2022-78502 A has room for improvement in resistance to an upward load input from the seat belt anchor. Specifically, it is desirable that the belt anchor bracket and the rotation plate do not lift off the upper rail of the seat slider when an upward load acts on the seat belt anchor.

[0005] In addition, in such a seat rotation device, it is desirable that the position of the rotation plate in the front-rear direction when it moves from the boarding / exiting position to the seating position be appropriately determined.

[0006] The object of the present invention is to provide a seat rotation device that can achieve both the prevention of the rotating plate from lifting up from the seat slider and the positioning of the rotating plate in the front-to-rear direction at the seating position. [Means for solving the problem]

[0007] A seat rotation device according to one aspect of the present invention is a seat rotation device that is capable of moving a seat body in the fore-and-aft direction of a vehicle and rotating the seat body between a seating position where the seat body faces the front of the vehicle and an entry / exit position where the seat body faces an opening of a door of the vehicle, the seat rotation device comprising: a seat slider for moving the seat body in the fore-and-aft direction, the seat slider having a lower rail fixed to a floor side and an upper rail movable along the lower rail; a base plate fixed to the upper rail; a rotation plate fixed to an underside of the seat body so as not to rotate relative to the seat body, the rotation plate including a belt anchor bracket to which a seat belt anchor is fixed; The vehicle seat includes a connecting unit that connects the base plate and the rotating plate so that the rotating plate can rotate relative to the base plate; a regulating portion that is fixed to the upper rail and that regulates upward movement of the belt anchor bracket when the rotating plate is in the seating position; a fixed member that is fixed to the belt anchor bracket; and a load receiving portion that is fixed to the upper rail and that receives an upward load acting on the fixed member when the rotating plate is in the seating position, wherein the regulating portion has an opposing portion that faces the rear end of the belt anchor bracket in the front-to-rear direction when the rotating plate is in the seating position, and a claw portion that is connected to the opposing portion and is located above the rear end of the belt anchor bracket when the rotating plate is in the seating position. [Effects of the Invention]

[0008] According to this invention, a seat rotation device can be provided that can achieve both of the following: preventing the rotating plate from floating up from the seat slider; and positioning the rotating plate in the fore-and-aft direction at the seating position. [Brief explanation of the drawings]

[0009] [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] FIG. [Figure 6] 10A and 10B are diagrams illustrating 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 7] FIG. 2 is a perspective view of the seat rotation device as viewed from below. [Figure 8] FIG. 2 is a perspective view of the vicinity of a restricting portion, a fixing member, and a load receiving portion. [Figure 9] FIG. 10 is a plan view of the vicinity of the belt anchor bracket and the restricting portion. [Figure 10] FIG. 10 is a cross-sectional view taken along line XX in FIG. [Figure 11] FIG. 6 is a perspective view of a seat rotation device according to a second embodiment of the present invention in a seated position. [Figure 12] FIG. 2 is a perspective view of the seat rotation device in the entry / exit position. [Figure 13] FIG. [Figure 14] FIG. 2 is a perspective view of the vicinity of a restricting portion, a fixing member, and a load receiving portion. [Figure 15] FIG. 10 is a side view of the vicinity of the restricting portion, the fixing member, and the load receiving portion. [Figure 16] FIG. 10 is a plan view of the vicinity of the belt anchor bracket and the restricting portion. [Figure 17] FIG. 17 is a cross-sectional view taken along line XVII-XVII in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] 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.

[0011] (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.

[0012] 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.

[0013] 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.

[0014] The seat rotation device 10 is capable of moving the seat body 2 in the longitudinal direction of the vehicle, and is also 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.

[0015] Fig. 3 is a perspective view of the seat rotation device in the first embodiment of the present invention in the seating position, Fig. 4 is a perspective view of the seat rotation device in the getting-in / out position, and Fig. 5 is an exploded perspective view of the seat rotation device.

[0016] As shown in FIGS. 3 to 5, the seat rotation device 10 includes a seat slider 50, a base plate 100, a rotation plate 200, a connecting unit 300, and a lock unit 500. As shown in FIG.

[0017] The seat slider 50 is fixed to the floor FL. The seat slider 50 is capable of sliding the seat body 2 relative to the floor FL in the front-to-rear direction of the vehicle. The seat slider 50 has a pair of lower rails 51 and a pair of upper rails 52.

[0018] The pair of lower rails 51 are arranged at a distance in the width direction of the vehicle. Each lower rail 51 is fixed to the floor FL in a position parallel to the front-rear direction of the vehicle. The bottom surface of each lower rail 51 is formed flat.

[0019] Each upper rail 52 is displaceable in the front-rear direction of the vehicle (longitudinal direction of the lower rail 51) relative to the lower rail 51. The upper surface of each upper rail 52 is formed flat.

[0020] The base plate 100 is fixed to the upper rail 52. The base plate 100 is movable along the lower rail 51 together with the upper rail 52.

[0021] 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 FIGS. 3 to 5, the rotating plate 200 has a belt anchor bracket 210, a side bracket 220, a rear pipe 231, a front pipe 232, a connecting plate 240, and a striker 250.

[0022] The belt anchor bracket 210 is a bracket to which a seat belt anchor (not shown) is fixed. The belt anchor bracket 210 has a shape that extends in the front-rear direction. The belt anchor bracket 210 is disposed above the upper rail 52 that is disposed on the inner side in the width direction (on the left side in this embodiment). The belt anchor bracket 210 has a bottom wall 212, a first side wall 214, and a second side wall 216.

[0023] The first side wall 214 stands upright from the end of the bottom wall 212 that is farther from the vehicle door opening. A bolt B for fixing a seat belt anchor is fixed to the first side wall 214.

[0024] The second side wall 216 faces the first side wall 214 in the width direction. The second side wall 216 stands upright from the end of the bottom wall 212 that is closer to the vehicle door opening.

[0025] The side bracket 220 is disposed at a position facing the belt anchor bracket 210 in the width direction. The side bracket 220 is disposed above the upper rail 52, which is disposed on the outer side in the width direction (on the right side in this embodiment). The side bracket 220 has a shape that extends in the front-rear direction.

[0026] The rear pipe 231 connects the rear portions of the belt anchor bracket 210 and the side bracket 220. More specifically, the rear pipe 231 connects the rear portions of the second side wall 216 and the side bracket 220.

[0027] The front pipe 232 connects the front portions of the belt anchor bracket 210 and the side bracket 220. More specifically, the rear pipe 231 connects the front portions of the second side wall 216 and the side bracket 220.

[0028] The connecting plate 240 connects the rear pipe 231 and the front pipe 232 together.

[0029] 3 to 5, striker 250 is fixed to the rear end of connecting plate 240. Striker 250 is fixed to connecting plate 240 in a state in which it straddles the inner end of rear pipe 231 in the width direction.

[0030] 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.

[0031] The connection unit 300 includes a rotation link 310 , a main slider 320 , and a sub-slider 330 .

[0032] 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. 6) and a rotating end 312.

[0033] 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 to the back side of the base plate 100 by a fastening member. The fixed end 311 is rotatable around a fixed shaft portion 311a (see FIG. 6), which is the central axis of the fastening member.

[0034] 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 fastening member. The rotating plate 200 is rotatable relative to the rotating end 312 around the support shaft portion 312a, which is the central axis of the fastening member. 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 to 5).

[0035] The main slider 320 includes a lower rail 321 and an upper slider 322 .

[0036] The lower rail 321 is fixed to the base plate 100. Specifically, the lower rail 321 is fixed to the center 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. 6) 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. 6, 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 in FIG. 6.

[0037] 6, 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.

[0038] 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. 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. 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 to 5).

[0039] 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 6) 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] 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.

[0041] The sub-slider 330 includes a lower rail 331 and an upper slider 332 .

[0042] 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 50, 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. 6 , the lower rail 331 is fixed to the base plate 100 in an orientation in which 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.

[0043] The upper slider 332 is movable along the lower rail 331. The upper slider 332 supports the rotating plate 200 so that the rotating plate 200 is rotatable relative to the upper slider 332. Specifically, the upper slider 332 is fixed to the rotating plate 200 by a fastening member. The rotating plate 200 is rotatable relative to the upper slider 332 around a support shaft portion 332a, which is the central axis of the fastening member. Hereinafter, the portion of the rotating plate 200 supported by the support shaft portion 332a will be referred to as the "third supported portion."

[0044] 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 6) 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.

[0045] Although not shown, the seat rotation device 10 may have a drive unit that drives the connecting unit 300. For example, the drive unit is composed of a motor, gears, and the like that can rotate the rotation link 310 about the fixed end 311. When the motor is driven while the rotation plate 200 is in the seating position, the rotation 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 rotation plate 200 rotates toward the entrance / exit while moving forward relative to the base plate 100. As a result, the rotation plate 200 is positioned in the entry / exit position.

[0046] The lock unit 500 locks the rotating plate 200 in the seated position. The lock unit 500 is fixed to the base plate 100 by a fastening member. The lock unit 500 can lock the striker 250 on the rotating plate 200 located in the seated position.

[0047] The restricting portion 700 restricts upward movement of the belt anchor bracket 210 when the rotating plate 200 is in the seating position. The restricting portion 700 is fixed to the upper rail 52 of the seat slider 50, which is disposed on the inner side in the width direction (on the left side in this embodiment). As shown in FIG. 10 , the restricting portion 700 is fixed to the upper rail 52 by a bolt B7 and a nut N7. The restricting portion 700 has an opposing portion 710 and at least one claw portion 720.

[0048] The facing portion 710 faces the rear end of the belt anchor bracket 210 in the front-rear direction when the rotating plate 200 is in the seating position. Specifically, the facing portion 710 faces the rear end of the bottom wall 212 in the front-rear direction when the rotating plate 200 is in the seating position. Note that the facing portion 710 may be in contact with the rear end of the bottom wall 212 when the rotating plate 200 is in the seating position, or may be slightly spaced apart from the rear end of the bottom wall 212.

[0049] At least one claw portion 720 has a pair of claw portions 720 spaced apart in the width direction. Each claw portion 720 is connected to the upper end of the opposing portion 710. Each claw portion 720 has a shape that extends forward from the upper end of the opposing portion 710. Each claw portion 720 is disposed between the first side wall 214 and the second side wall 216 when the rotating plate 200 is in the seating position. Each claw portion 720 is located above the rear end of the belt anchor bracket 210 when the rotating plate 200 is in the seating position. Specifically, each claw portion 720 is located above the rear end of the bottom wall 212 when the rotating plate 200 is in the seating position.

[0050] The fixing member 800 is fixed to the belt anchor bracket 210. In this embodiment, the fixing member 800 is made of a metal bracket. The fixing member 800 has a base portion 810 and a pipe contact portion 820.

[0051] The base portion 810 is disposed below the belt anchor bracket 210. The base portion 810 is fixed to the lower surface of the bottom wall 212 by welding or the like.

[0052] The pipe contact portion 820 is connected to the base portion 810. The pipe contact portion 820 has a shape that extends from the rear end portion of the base portion 810 in the width direction toward the rear pipe 231. As shown in FIG. 7 , the pipe contact portion 820 is in contact with the rear pipe 231 from below. The pipe contact portion 820 may be connected to the rear pipe 231 by welding or the like. An insertion hole is formed in the pipe contact portion 820, through which the striker 250 is inserted.

[0053] 4 and 5, the load receiving portion 900 is fixed to the upper rail 52 of the seat slider 50, which is disposed on the inner side in the width direction (on the left side in this embodiment). The load receiving portion 900 receives an upward load acting on the fixed member 800 when the rotating plate 200 is in the seating position. The upward load can be input from the seat belt anchor via the belt anchor bracket 210 and the bolt B. In this embodiment, the load receiving portion 900 has a shaft portion 910 and a protruding portion 920.

[0054] The shaft portion 910 has a shape that extends upward from the upper rail 52. As shown in Figure 10, the shaft portion 910 is threadedly engaged with a bolt B5 that is fixed to the top surface of the upper rail 52.

[0055] The protruding portion 920 has a shape that protrudes from the upper end of the shaft portion 910 in a direction perpendicular to the shaft portion 910. The protruding portion 920 is formed in a circular plate shape that is connected in an annular shape in the circumferential direction of the shaft portion 910. However, the protruding portion 920 may be formed in a shape that protrudes from the upper end of the shaft portion 910 in only one direction (for example, forward).

[0056] 8 and 10, the base portion 810 includes an overlapping portion 812 that does not interfere with the shaft portion 910 and the protruding portion 920 when the rotating plate 200 moves between the seating position and the boarding / disembarking position, and that is located below the protruding portion 920 when the rotating plate 200 is in the seating position. In this embodiment, a through-hole 810h is formed in the base portion 810. The through-hole 810h is large enough to allow the protruding portion 920 to pass through when the rotating plate 200 moves between the seating position and the boarding / disembarking position, and the overlapping portion 812 is configured as a portion of the base portion 810 that surrounds the through-hole 810h.

[0057] 10 , the overlapping portion 812 faces the shaft portion 910 in the front-rear direction when the rotating plate 200 is in the seated position. The overlapping portion 812 faces the shaft portion 910 in the width direction when the rotating plate 200 is in the seated position. Note that the overlapping portion 812 may be in contact with the shaft portion 910 when the rotating plate 200 is in the seated position, or may be slightly spaced apart from the shaft portion 910.

[0058] In the seat rotation device 10 described above, the upward load input from the seat belt anchor to the belt anchor bracket 210 is received by the claw portion 720 of the restricting portion 700 and also by the load receiving portion 900 via the fixing member 800. This prevents the rotating plate 200 from lifting up from the seat slider 50. Furthermore, because the opposing portion 710 of the restricting portion 700 faces the rear end of the belt anchor bracket 210, the front-rear position of the rotating plate 200 in the seating position is effectively determined.

[0059] In the above embodiment, the belt anchor bracket 210 and the fixing member 800 may be formed as a single member rather than as separate members.

[0060] (Second embodiment) Next, a seat rotation device 10 according to a second embodiment of the present invention will be described with reference to Figures 11 to 17. Note that in the second embodiment, only the parts that are different from the first embodiment will be described, and the description of the same structure, action, and effect as the first embodiment will not be repeated.

[0061] In this embodiment, the main difference from the first embodiment is the structure of a fixing member 800 and a load receiving portion 900.

[0062] In this embodiment, the fixing member 800 has a shaft portion 830 and a protruding portion 840. Specifically, the fixing member 800 is configured as a shoulder bolt.

[0063] Shaft portion 830 has a shape that extends downward from belt anchor bracket 210. Specifically, shaft portion 830 is fixed to bottom wall 212 by welding or the like. Shaft portion 830 is configured as the shaft portion of a shoulder bolt.

[0064] The protruding portion 840 has a shape that protrudes from the lower end of the shaft portion 830 in a direction perpendicular to the shaft portion 830. The protruding portion 840 is formed in a circular plate shape that is connected in an annular shape in the circumferential direction of the shaft portion 830. However, the protruding portion 840 may be formed in a shape that protrudes in one direction (for example, rearward) from the lower end of the shaft portion 830.

[0065] The load receiving portion 900 is fixed to the restriction portion 700 by welding or the like. That is, in this embodiment, the load receiving portion 900 is fixed to the upper rail 52 via the restriction portion 700. As shown in FIGS. 14 to 17, the load receiving portion 900 is fixed to the restriction portion 700 so as to cover the bolt B7 and the nut N7.

[0066] The load receiving portion 900 has an overlapping portion 930 that does not interfere with the shaft portion 830 and the protruding portion 840 when the rotating plate 200 moves between the seating position and the boarding / disembarking position, and that is located above the protruding portion 840 when the rotating plate 200 is in the seating position. As shown in FIG. 17 , the overlapping portion 930 faces the shaft portion 830 in the front-rear direction when the rotating plate 200 is in the seating position. As shown in FIG. 14 , the overlapping portion 930 faces the shaft portion 830 in the width direction when the rotating plate 200 is in the seating position. More specifically, the overlapping portion 930 faces the inner end of the shaft portion 830 in the width direction when the rotating plate 200 is in the seating position. The overlapping portion 930 may also face the outer end of the shaft portion 830 in the width direction when the rotating plate 200 is in the seating position. The overlapping portion 930 may be in contact with the shaft portion 830 when the rotation plate 200 is in the seated position, or may be slightly spaced apart from the shaft portion 830.

[0067] 15 to 17, belt anchor bracket 210 may further include a reinforcing plate 213 that reinforces bottom wall 212. Reinforcing plate 213 is fixed to the rear end of bottom wall 212 by welding or the like. Note that reinforcing plate 213 does not have to be a different material from bottom wall 212, and may be made of the same material as bottom wall 212.

[0068] It will be appreciated by those skilled in the art that the exemplary embodiments described above are examples of the following aspects.

[0069] (Aspect 1) A seat rotation device capable of moving a seat body in the front-rear direction of a vehicle and rotating the seat body between a seating position where the seat body faces the front of the vehicle and an entry / exit position where the seat body faces an opening of a door of the vehicle, a seat slider for moving the seat body in a front-rear direction, the seat slider having a lower rail fixed to a floor side and an upper rail movable along the lower rail; a base plate fixed to the upper rail; a rotation plate fixed to the underside of the seat body so as not to rotate relative to the seat body, the rotation plate including a belt anchor bracket to which a seat belt anchor is fixed; 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; a restricting portion fixed to the upper rail and restricting upward movement of the belt anchor bracket when the rotating plate is in the seating position; a fixing member fixed to the belt anchor bracket; a load receiving portion fixed to the upper rail and configured to receive an upward load acting on the fixed member when the rotating plate is in a seated position; The restriction portion is an opposing portion that faces a rear end portion of the belt anchor bracket in the front-rear direction when the rotation plate is at the seating position; a claw portion connected to the opposing portion and positioned above a rear end portion of the belt anchor bracket when the rotation plate is in the seating position.

[0070] In this seat rotation device, the upward load input from the seat belt anchor to the belt anchor bracket is received by the claw portion of the restricting portion and also by the load receiving portion via the fixing member. This prevents the rotating plate from lifting up from the seat slider. Furthermore, because the opposing portion of the restricting portion faces the rear end of the belt anchor bracket, the fore-and-aft position of the rotating plate in the seating position is effectively determined.

[0071] (Aspect 2) the fixing member includes a base portion disposed below the belt anchor bracket, The load receiving portion is a shaft portion extending upward from the upper rail; a protruding portion having a shape that protrudes from an upper end of the shaft portion in a direction perpendicular to the shaft portion, The seat rotation device of aspect 1, wherein the base portion includes an overlapping portion that does not interfere with the shaft portion and the protrusion portion when the rotating plate moves between the seating position and the boarding / disembarking position, and is positioned below the protrusion portion when the rotating plate is in the seating position.

[0072] (Aspect 3) The rotating plate is a side bracket that is disposed above the seat slider and opposite the belt anchor bracket in the width direction of the vehicle, and that has a shape that extends in the front-rear direction; a rear pipe connecting rear portions of the belt anchor bracket and the side brackets together, 3. The seat rotation device according to claim 2, wherein the fixing member further includes a pipe contact portion connected to the base portion and contacting the rear pipe from below.

[0073] In this aspect, the upward load acting on the belt anchor bracket is received by both the belt anchor bracket and the side bracket via the rear pipe, so that the rotation plate is more reliably prevented from lifting up from the seat slider.

[0074] (Aspect 4) Aspect 4. The seat rotation device according to aspect 2 or 3, wherein the overlapping portion faces the shaft portion in the width direction when the rotation plate is in the seating position.

[0075] In this embodiment, the position of the rotating plate in the width direction relative to the upper rail when the rotating plate is in the seating position is determined.

[0076] (Aspect 5) The fixing member is a shaft portion having a shape extending downward from the belt anchor bracket; a protruding portion having a shape that protrudes from a lower end of the shaft portion in a direction perpendicular to the shaft portion, The seat rotation device of aspect 1, wherein the load-receiving portion does not interfere with the shaft portion and the protrusion portion when the rotating plate moves between the seating position and the boarding / disembarking position, and includes an overlapping portion that is positioned above the protrusion portion when the rotating plate is in the seating position.

[0077] (Aspect 6) Aspect 6. The seat rotation device according to aspect 5, wherein the overlapping portion faces the shaft portion in the width direction when the rotation plate is in the seating position.

[0078] In this embodiment, the position of the rotating plate in the width direction relative to the upper rail when the rotating plate is in the seating position is determined.

[0079] 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]

[0080] 1 swivel seat, 2 seat body, 10 seat rotation device, 50 seat slider, 51 lower rail, 52 upper rail, 100 base plate, 200 rotation plate, 210 belt anchor bracket, 212 bottom wall, 214 first side wall, 216 second side wall, 220 side bracket, 231 rear pipe, 232 front pipe, 240 connecting plate, 250 striker, 300 connecting unit, 310 rotating link, 311 fixed end, 312 rotating end, 320 main slider, 321 lower rail, 322 upper slider, 330 sub-slider, 331 lower rail, 332 upper slider, 500 lock unit, 700 restricting portion, 710 opposing portion, 720 claw portion, 800 fixing member, 810 base portion, 810h Through hole, 812 overlapping part, 820 pipe contact part, 830 shaft part, 840 overhanging part, 900 load bearing part, 910 shaft part, 920 overhanging part, 930 overlapping part, A1 imaginary circle, A2 circle, B bolt, FL floor.

Claims

1. A seat rotation device capable of moving a seat body in the front-rear direction of a vehicle and rotating the seat body between a seating position where the seat body faces the front of the vehicle and an entry / exit position where the seat body faces an opening of a door of the vehicle, a seat slider for moving the seat body in a front-rear direction, the seat slider having a lower rail fixed to a floor side and an upper rail movable along the lower rail; a base plate fixed to the upper rail; a rotation plate fixed to the underside of the seat body so as not to rotate relative to the seat body, the rotation plate including a belt anchor bracket to which a seat belt anchor is fixed; 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; a restricting portion fixed to the upper rail and restricting upward movement of the belt anchor bracket when the rotating plate is in the seating position; a fixing member fixed to the belt anchor bracket; a load receiving portion fixed to the upper rail and configured to receive an upward load acting on the fixed member when the rotating plate is in a seated position; The restriction portion is an opposing portion that faces a rear end portion of the belt anchor bracket in the front-rear direction when the rotation plate is at the seating position; a claw portion connected to the opposing portion and positioned above a rear end portion of the belt anchor bracket when the rotation plate is in the seating position.

2. the fixing member includes a base portion disposed below the belt anchor bracket, The load receiving portion is a shaft portion extending upward from the upper rail; a protruding portion having a shape that protrudes from an upper end of the shaft portion in a direction perpendicular to the shaft portion, 2. The seat rotation device according to claim 1, wherein the base portion includes an overlapping portion that does not interfere with the shaft portion and the protrusion portion when the rotating plate moves between the seating position and the boarding / exiting position, and that is positioned below the protrusion portion when the rotating plate is in the seating position.

3. The rotating plate is a side bracket that is disposed above the seat slider and opposite the belt anchor bracket in the width direction of the vehicle, and that has a shape that extends in the front-rear direction; a rear pipe connecting rear portions of the belt anchor bracket and the side brackets together, The seat rotation device according to claim 2 , wherein the fixing member further includes a pipe contact portion connected to the base portion and contacting the rear pipe from below.

4. The seat rotation device according to claim 2 or 3, wherein the overlapping portion faces the shaft portion in the width direction of the vehicle when the rotation plate is in the seating position.

5. The fixing member is a shaft portion having a shape extending downward from the belt anchor bracket; a protruding portion having a shape that protrudes from a lower end of the shaft portion in a direction perpendicular to the shaft portion, 2. The seat rotation device according to claim 1, wherein the load-receiving portion includes an overlapping portion that does not interfere with the shaft portion and the protrusion portion when the rotating plate moves between the seating position and the boarding / exiting position, and that is positioned above the protrusion portion when the rotating plate is in the seating position.

6. The seat rotation device according to claim 5 , wherein the overlapping portion faces the shaft portion in the width direction of the vehicle when the rotation plate is in the seating position.

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