Seat swivel device

Abstract

A seat swivel device includes a seat slide having a lower rail and an upper rail, a base plate, a swivel plate including a seat belt anchor bracket, a coupling unit, a restriction portion, a fixing member, and a load receiving portion. The restriction portion has a facing portion facing a rear end portion of the seat belt anchor bracket in a front-rear direction when the swivel plate is in a seated position, and a claw portion positioned above the rear end portion of the seat belt anchor bracket when the swivel plate is in the seated position.

Description

Technical Field

[0001] This invention relates to a seat rotation device. Background Technology

[0002] Previously, a seat rotation device was known that allowed the seat body to slide in the forward and backward direction of a vehicle and to rotate between a seated position and an alighting / getting-out position. For example, Japanese Patent Application Publication No. 2022-78502 discloses a seat rotation device comprising a seat slide member, a base plate, a rotating plate, and a connecting unit. The seat slide member 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 rotating plate is fixed to the lower surface of the seat body. The connecting unit connects the base plate to the rotating plate in such a way that the rotating plate can rotate relative to the base plate between the seated position and the alighting / getting-out position. A seatbelt fastener bracket for securing a seatbelt is mounted at the inner end of the rotating plate in the vehicle width direction. Summary of the Invention

[0003] In the seat rotation device described in Japanese Patent Application Publication No. 2022-78502, there is room for improvement in the resistance to upward loads input from the seat belt retainer. Specifically, it is preferable that when an upward load is applied to the seat belt retainer, the seat belt retainer bracket and the rotating plate do not lift off the upper track of the seat slide member.

[0004] Furthermore, in such a seat rotation device, it is preferable to appropriately determine the position of the rotating plate in the front-rear direction as it moves from the getting-on / off position to the seating position.

[0005] The purpose of this invention is to provide a seat rotation device that can both prevent the rotating plate from floating off the seat slide and position the rotating plate in the front-back direction at the seat position.

[0006] One aspect of the present invention relates to a seat rotation device capable of moving a seat body in the longitudinal direction of a vehicle and capable of rotating the seat body between a seating position facing forward of the vehicle and an alighting / getting-out position facing the door opening of the vehicle. The seat rotation device comprises: a seat slide member for moving the seat body in the longitudinal direction, having a lower rail fixed to the floor side and an upper rail movable along the lower rail; a base plate fixed to the upper rail; a rotating plate fixed to the lower surface of the seat body in a manner that does not rotate relative to the seat body, and including a seatbelt retainer bracket for securing a seatbelt retainer; and a connecting unit for the rotating plate to be positioned relative to the seat body. The base plate is connected to the rotating plate by means of rotation between the seated position and the boarding / alighting position; a limiting part is fixed to the upper rail and limits the upward movement of the seat belt fastener bracket when the rotating plate is in the seated position; a fixing member is fixed to the seat belt fastener bracket; and a load-bearing part is fixed to the upper rail and bears the upward load acting on the fixing member when the rotating plate is in the seated position. The limiting part has: an opposing part facing the rear end of the seat belt fastener bracket when the rotating plate is in the seated position in the front-rear direction; and a claw part connected to the opposing part and located above the rear end of the seat belt fastener bracket when the rotating plate is in the seated position.

[0007] The above-mentioned and other objects, features, aspects and advantages of the present invention will become clear from the following detailed description relating to the present invention, taken in conjunction with the accompanying drawings. Attached Figure Description

[0008] Figure 1 This is a 3D view of the rotating chair at the seating position.

[0009] Figure 2 It is a 3D diagram of the rotating seats at the boarding and alighting points.

[0010] Figure 3 This is a perspective view of the seat rotation device in the first embodiment of the present invention at the seated position.

[0011] Figure 4 It is a 3D diagram of the seat rotation device at the boarding and alighting position.

[0012] Figure 5 This is an exploded perspective view of the seat rotation mechanism.

[0013] Figure 6 It is a diagram showing the positional relationship between the base plate, the rotating plate, and the connecting unit at the seating position and the boarding / alighting position.

[0014] Figure 7 This is a 3D view of the seat rotation mechanism from below.

[0015] Figure 8 It is a three-dimensional view of the vicinity of the limiting part, the fixing component, and the load-bearing part.

[0016] Figure 9 This is a top view of the vicinity of the seatbelt fastener bracket and restraints.

[0017] Figure 10 yes Figure 9 A sectional view at line XX in the diagram.

[0018] Figure 11 This is a perspective view of the seat rotation device in the second embodiment of the present invention at the seating position.

[0019] Figure 12 It is a 3D diagram of the seat rotation device at the boarding and alighting position.

[0020] Figure 13 This is an exploded perspective view of the seat rotation mechanism.

[0021] Figure 14 It is a three-dimensional view of the vicinity of the limiting part, the fixing component, and the load-bearing part.

[0022] Figure 15 It is a side view of the vicinity of the limiting part, fixing member and load-bearing part.

[0023] Figure 16 This is a top view of the vicinity of the seatbelt fastener bracket and restraints.

[0024] Figure 17 yes Figure 16 A sectional view along line XVII-XVII. Detailed Implementation

[0025] Embodiments of the present invention will be described with reference to the accompanying drawings. Furthermore, in the drawings referred to below, the same or equivalent components are labeled with the same reference numerals.

[0026] (First Implementation)

[0027] Figure 1 This is a 3D view of the rotating chair at the seating position. Figure 2 This is a perspective view of a rotating seat at the boarding and alighting position. This rotating seat 1 functions as a seat in a means of transportation, especially in a vehicle.

[0028] like Figure 1 and Figure 2 As shown, the rotating seat 1 of this embodiment includes a seat body 2 and a seat rotating device 10.

[0029] The seat body 2 has a seat cushion 2a and a seat back 2b. The seat cushion 2a constitutes the seat portion. The seat back 2b supports the back of the occupant sitting on the seat cushion 2a. The seat body 2 is mounted on the floor FL of the vehicle.

[0030] The seat rotation device 10 enables the seat body 2 to move in the fore-and-aft direction of the vehicle, and enables the seat body 2 to be in a seated position. Figure 1 The location shown) and the boarding / alighting location ( Figure 2 The seat rotates between the indicated positions. The seat position is the position where the seat body 2 faces the front of the vehicle. The getting in and out position is the position where the seat body 2 faces the opening of the vehicle door. The seat rotation device 10 is fixed to the lower surface of the seat body 2.

[0031] Figure 3 This is a perspective view of the seat rotation device in the first embodiment of the present invention at the seated position. Figure 4 It is a 3D diagram of the seat rotation device at the boarding and alighting position. Figure 5 This is an exploded perspective view of the seat rotation mechanism.

[0032] like Figures 3 to 5 As shown, the seat rotation device 10 includes a seat slider 50, a base plate 100, a rotating plate 200, a connecting unit 300, and a locking unit 500.

[0033] The seat slide 50 is fixed to the floor FL. The seat slide 50 allows the seat body 2 to slide relative to the floor FL in the fore-and-aft direction of the vehicle. The seat slide 50 has a pair of lower rails 51 and a pair of upper rails 52.

[0034] A pair of lower rails 51 are spaced apart 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.

[0035] Each upper track 52 is capable of relative displacement with respect to each lower track 51 in the longitudinal direction of the vehicle (the longitudinal direction of the lower track 51). The upper surface of each upper track 52 is formed flat.

[0036] The substrate 100 is fixed to the upper track 52. The substrate 100 can move along the lower track 51 together with the upper track 52.

[0037] The rotating plate 200 is fixed to the lower surface of the seat body 2 in a manner that does not rotate relative to the seat body 2. For example... Figures 3-5 As shown, the rotating plate 200 has a seat belt fastener bracket 210, a side bracket 220, a rear tube 231, a front tube 232, a connecting plate 240, and a striker 250.

[0038] The seatbelt fastener bracket 210 is a bracket for securing the seatbelt fastener (not shown). The seatbelt fastener bracket 210 has a shape that extends in the front-to-back direction. The seatbelt fastener bracket 210 is positioned above an upper track 52 located on the inner side (left side in this embodiment) in the width direction. The seatbelt fastener bracket 210 has a bottom wall 212, a first side wall 214, and a second side wall 216.

[0039] The first sidewall 214 rises from the end of the bottom wall 212 on the side away from the door opening of the vehicle. Bolts B for securing seat belt fasteners are fixed to the first sidewall 214.

[0040] The second sidewall 216 faces the first sidewall 214 in the width direction. The second sidewall 216 rises from the end of the bottom wall 212 on the side near the opening of the vehicle door.

[0041] The side bracket 220 is positioned opposite the seatbelt fastener bracket 210 in the width direction. The side bracket 220 is positioned above the upper rail 52, which is located on the outer side (right side in this embodiment) in the width direction. The side bracket 220 has a shape that extends in the front-rear direction.

[0042] The rear tube 231 connects the seatbelt fastener bracket 210 to the rear portion of the side bracket 220. More specifically, the rear tube 231 connects the second sidewall 216 to the rear portion of the side bracket 220.

[0043] The front tube 232 connects the front portion of the seatbelt retainer bracket 210 to the front portion of the side bracket 220. More specifically, the rear tube 231 connects the second sidewall 216 to the front portion of the side bracket 220.

[0044] The connecting plate 240 connects the rear tube 231 to the front tube 232.

[0045] like Figures 3-5 As shown, the firing pin 250 is fixed to the rear end of the connecting plate 240. The firing pin 250 is fixed to the connecting plate 240 with its end extending beyond the inner side of the rear tube 231 in the width direction.

[0046] The connecting unit 300 connects the substrate 100 and the rotating plate 200 in such a way that the rotating plate 200 can rotate relative to the substrate 100 between the seated position and the loading / unloading position.

[0047] The connecting unit 300 has a rotating link 310, a main sliding member 320 and a secondary sliding member 330.

[0048] The rotating link 310 connects the base plate 100 to the rotating plate 200. The rotating link 310 has a fixed end 311 (see reference). Figure 6 ) and rotating end 312.

[0049] The fixed end 311 is formed by one end of the rotating link 310. The fixed end 311 is fixed to the substrate 100 in a manner that allows it to rotate relative to the substrate 100. Specifically, the fixed end 311 is fixed from the back side of the substrate 100 by a fastening member. The fixed end 311 can rotate around the fixed shaft portion 311a (see reference 311a), which serves as the central axis of the fastening member. Figure 6 Rotate.

[0050] The rotating end 312 is formed from the other end of the rotating link 310. The rotating end 312 is fixed to the rotating plate 200 in such a way that it can rotate relative to the base plate 100 with the fixed shaft portion 311a of the fixed end 311 as the rotation center, and can rotate 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 can rotate relative to the rotating end 312 about the support shaft portion 312a, which is the central axis of the fastening member. Hereinafter, the part of the rotating plate 200 supported by the support shaft portion 312a will be described as "first supported portion 201" (see reference). Figures 3-5 ).

[0051] The main sliding member 320 has a lower track 321 and an upper sliding member 322.

[0052] The lower track 321 is fixed to the substrate 100. Specifically, the lower track 321 is fixed to the center of the substrate 100. The lower track 321 has a shape that extends in a straight line. The lower track 321 extends along an imaginary circle A1 (see reference). Figure 6 The imaginary circle A1 has a diameter that extends in a straight line. Its radius is twice the distance between the fixed shaft portion 311a of the fixed end 311 and the support shaft portion 312a of the rotating end 312, and it is centered on the fixed shaft portion 311a. Furthermore, in Figure 6 In the diagram, a single-dotted line represents the imaginary circle A1, and a circle A2 with the length between the fixed shaft 311a and the support shaft 312a as its radius and the support shaft 312a as its center. A double-dotted line represents the rotating plate 200. Additionally, in... Figure 6 The vehicle boarding and alighting area is located above it.

[0053] like Figure 6 As shown, the lower track 321 has a shape that extends in a straight line along the diameter of an imaginary circle A1 in a direction that intersects with the front-rear direction relative to the vehicle. The lower track 321 is inclined relative to the front-rear direction in such a way that it gradually approaches the opening of the door as it moves towards the front of the vehicle.

[0054] The upper sliding member 322 is movable along the lower track 321. The upper sliding member 322 supports the rotating plate 200 in such a way that the rotating plate 200 can rotate relative to the upper sliding member 322. Specifically, the upper sliding member 322 is fixed to the rotating plate 200 by a fastening member. The rotating plate 200 is rotatable relative to the upper sliding member 322 about a support shaft portion 322a, which serves as 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 reference). Figures 3-5 ).

[0055] The upper sliding member 322 causes the second supported portion 202 of the rotating plate 200 to move in the same direction as the rotating plate 200 rotates relative to the rotating end 312 when the rotating plate 200 moves from the seated position to the unloading position. Figure 6 It rotates relative to the upper slider 322 in the same direction (clockwise) and moves along the lower track 321.

[0056] When the seat body 2 moves between the seated position and the alighting position, the support shaft portion 322a of the upper sliding member 322 moves along the trajectory of a point on circle A2 (the diameter of imaginary circle A1) when the circle A2 is internally tangent to the imaginary circle A1 and rotates.

[0057] The auxiliary slider 330 has a lower track 331 and an upper slider 332.

[0058] The lower track 331 is fixed to the base plate 100. Specifically, the lower track 331 is fixed to the portion of the base plate 100 located between the lower track 321 of the seat slide member 50 and the main slide member 320, which is disposed on the inner side in the width direction. The lower track 331 has a shape that extends in a straight line. Figure 6 As shown, the lower track 331 is fixed to the base plate 100 in such a manner that the extension of the lower track 331 does not pass through the fixed shaft portion 311a, which is the center of the imaginary circle A1. The lower track 331 is inclined relative to the front-rear direction in such a manner that it gradually approaches the opening of the door as it moves towards the front of the vehicle.

[0059] The upper sliding member 332 is movable along the lower track 331. The upper sliding member 332 supports the rotating plate 200 in such a way that the rotating plate 200 can rotate relative to the upper sliding member 332. Specifically, the upper sliding member 332 is fixed to the rotating plate 200 by a fastening member. The rotating plate 200 is rotatable relative to the upper sliding member 332 about a support shaft portion 332a, which serves as 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".

[0060] The upper sliding member 322 causes the third supported portion of the rotating plate 200 to move in the same direction as the rotating plate 200 rotates relative to the rotating end 312 when the rotating plate 200 moves from the seated position to the loading / unloading position. Figure 6 It rotates relative to the upper slider 332 in the same direction (clockwise) and moves along the lower track 331.

[0061] Additionally, although the illustration is omitted, the seat rotation device 10 may also have a drive unit that drives the connecting unit 300. For example, the drive unit may consist of a motor, gears, or the like that can rotate the rotating link 310 about the fixed end 311. When the motor is driven while the rotating plate 200 is in the seated position, the rotating link 310 rotates about the fixed end 311, and each of the upper sliding members 322, 332 moves forward along each of the lower tracks 321, 331. As a result, the rotating plate 200 moves forward relative to the base plate 100 while rotating toward the boarding / alighting position. Consequently, the rotating plate 200 is in the boarding / alighting position.

[0062] The locking unit 500 locks the rotating plate 200 in the seated position. The locking unit 500 is fixed to the base plate 100 by a fastening member. The locking unit 500 is capable of locking the firing pin 250 of the rotating plate 200 in the seated position.

[0063] The limiting part 700 restricts the upward movement of the seat belt fastener bracket 210 when the rotating plate 200 is in the seated position. The limiting part 700 is fixed to the upper track 52 of the seat slide member 50, which is arranged on the inner side (left side in this embodiment) in the width direction. Figure 10 As shown, the limiting part 700 is fixed to the upper rail 52 by bolt B7 and nut N7. The limiting part 700 has an opposing part 710 and at least one claw part 720.

[0064] The opposing portion 710 faces the rear end of the seatbelt retainer bracket 210 when the rotating plate 200 is in the seated position in the front-rear direction. Specifically, the opposing portion 710 faces the rear end of the bottom wall 212 when the rotating plate 200 is in the seated position in the front-rear direction. In addition, the opposing portion 710 may contact the rear end of the bottom wall 212 when the rotating plate 200 is in the seated position, or it may be slightly separated from the rear end of the bottom wall 212.

[0065] At least one claw portion 720 has a pair of claw portions 720 arranged at intervals 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 sidewall 214 and the second sidewall 216 when the rotating plate 200 is in the seated position. Each claw portion 720 is located above the rear end of the seat belt fastener bracket 210 when the rotating plate 200 is in the seated 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 seated position.

[0066] The fixing member 800 is fixed to the seat belt fastener bracket 210. In this embodiment, the fixing member 800 is made of a metal bracket. The fixing member 800 has a base 810 and a tube contact portion 820.

[0067] The base 810 is positioned below the seatbelt retainer bracket 210. The base 810 is fixed to the lower surface of the bottom wall 212 by welding or the like.

[0068] The tube contact portion 820 is connected to the base portion 810. The tube contact portion 820 has a shape that extends in the width direction from the rear end of the base portion 810 toward the rear tube 231. Figure 7 As shown, the tube contact portion 820 contacts the rear tube 231 from below. The tube contact portion 820 can also be connected to the rear tube 231 by welding or the like. An insertion hole is formed in the tube contact portion 820 for inserting the firing pin 250.

[0069] like Figure 4 and Figure 5 As shown, the load-bearing portion 900 is fixed to the upper track 52 of the seat slide member 50, which is disposed on the inner side (left side in this embodiment) in the width direction. The load-bearing portion 900 bears the upward load acting on the fixing member 800 when the rotating plate 200 is in the seated position. In addition, the above-mentioned upward load may be input from the seat belt fastener via the seat belt fastener bracket 210 and bolt B. In this embodiment, the load-bearing portion 900 has a shaft portion 910 and a protrusion portion 920.

[0070] The shaft portion 910 has a shape that extends upward from the upper track 52. For example... Figure 10 As shown, the shaft 910 is screwed into bolt B5, which is fixed to the upper surface of the upper rail 52.

[0071] The protrusion 920 has a shape that extends from the upper end of the shaft portion 910 in a direction orthogonal to the shaft portion 910. The protrusion 920 is formed as a circular plate connected in a ring shape in the circumferential direction of the shaft portion 910. However, the protrusion 920 may also be formed as a shape that extends from the upper end of the shaft portion 910 in only one direction (e.g., forward).

[0072] like Figure 8 and Figure 10 As shown, the base 810 includes an overlapping portion 812, which does not interfere with the shaft portion 910 and the protrusion 920 when the rotating plate 200 moves between the seated position and the alighting / getting-off position, and is located below the protrusion 920 when the rotating plate 200 is in the seated position. In this embodiment, a through hole 810h of a size that allows the protrusion 920 to pass through when the rotating plate 200 moves between the seated position and the alighting / getting-off position is formed in the base 810, and the overlapping portion 812 is formed by the portion of the base 810 surrounding the through hole 810h.

[0073] like Figure 10 As shown, 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 also faces the shaft portion 910 in the width direction when the rotating plate 200 is in the seated position. Furthermore, the overlapping portion 812 may contact the shaft portion 910 when the rotating plate 200 is in the seated position, or it may be slightly separated from the shaft portion 910.

[0074] In the seat rotation device 10 described above, the upward load input from the seat belt fastener to the seat belt fastener bracket 210 is borne by the claw portion 720 of the limiting portion 700 and by the load-bearing portion 900 via the fixing member 800. Therefore, the lifting of the rotating plate 200 from the seat slide member 50 is suppressed. Furthermore, since the opposing portion 710 of the limiting portion 700 faces the rear end of the seat belt fastener bracket 210, the fore-and-aft position of the rotating plate 200 at the seated position is effectively determined.

[0075] In the above embodiments, the seat belt fastener bracket 210 and the fastening member 800 may also be formed as a single member, rather than as different members from each other.

[0076] (Second Implementation)

[0077] Next, refer to Figures 11 to 17 The seat rotation device 10 in the second embodiment of the present invention will be described. Furthermore, in the second embodiment, only the parts that differ from the first embodiment will be described, and descriptions of the same structure, function, and effects as in the first embodiment will not be repeated.

[0078] In this embodiment, the main difference is that the structure of the fixing member 800 and the load-bearing part 900 is different from that of the first embodiment.

[0079] In this embodiment, the fixing member 800 has a shaft portion 830 and a protrusion portion 840. Specifically, the fixing member 800 is composed of a shoulder bolt.

[0080] The shaft portion 830 has a shape that extends downward from the seat belt fastener bracket 210. Specifically, the shaft portion 830 is fixed to the bottom wall 212 by welding or the like. The shaft portion 830 is composed of a shaft portion with shoulder bolts.

[0081] The protrusion 840 has a shape that extends from the lower end of the shaft portion 830 in a direction orthogonal to the shaft portion 830. The protrusion 840 is formed as a circular plate connected in a ring shape in the circumferential direction of the shaft portion 830. However, the protrusion 840 may also be formed as a shape that extends from the lower end of the shaft portion 830 in one direction (e.g., rearward).

[0082] The load-bearing part 900 is fixed to the limiting part 700 by welding or the like. That is, in this embodiment, the load-bearing part 900 is fixed to the upper track 52 via the limiting part 700. Figures 14-17 As shown, the load-bearing part 900 is fixed to the limiting part 700 by covering bolt B7 and nut N7.

[0083] The load-bearing part 900 has an overlapping part 930, which does not interfere with the shaft part 830 and the protrusion part 840 when the rotating plate 200 moves between the seated position and the alighting position, and is located above the protrusion part 840 when the rotating plate 200 is in the seated position. Figure 17 As shown, the overlapping portion 930 faces the shaft portion 830 in the front-rear direction when the rotating plate 200 is in the seated position. Figure 14 As shown, the overlapping portion 930 faces the shaft portion 830 in the width direction when the rotating plate 200 is in the seated position. More specifically, when the rotating plate 200 is in the seated position, the overlapping portion 930 faces the inner end of the shaft portion 830 in the width direction. 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 seated position. Furthermore, the overlapping portion 930 may be in contact with the shaft portion 830 when the rotating plate 200 is in the seated position, or it may be slightly separated from the shaft portion 830.

[0084] like Figures 15-17 As shown, the seatbelt fastener bracket 210 may also include a reinforcing plate 213 for reinforcing the bottom wall 212. The reinforcing plate 213 is fixed to the rear end of the bottom wall 212 by welding or the like. Alternatively, the reinforcing plate 213 may not be made of a different component from the bottom wall 212, but rather of the same component as the bottom wall 212.

[0085] Those skilled in the art will understand that the exemplary embodiments described above are specific examples of the following approaches.

[0086] (Method 1)

[0087] A seat rotating device is provided, which enables a seat body to move in the longitudinal direction of a vehicle and allows the seat body to rotate between a seating position facing forward of the vehicle and an getting-on / off position facing the opening of a door of the vehicle, wherein the seat rotating device comprises:

[0088] A seat slider for moving the seat body in the fore-and-aft direction, and having a lower rail fixed to the floor side and an upper rail capable of moving along the lower rail;

[0089] The substrate is fixed to the upper track;

[0090] A rotating plate is fixed to the lower surface of the seat body in a manner that does not rotate relative to the seat body, and includes a seat belt fastener bracket for securing the seat belt fastener.

[0091] A connecting unit connects the base plate to the rotating plate in such a way that the rotating plate can rotate relative to the base plate between the seated position and the boarding / alighting position;

[0092] A limiting part is fixed to the upper rail and restricts the upward movement of the seat belt fastener bracket when the rotating plate is in the seated position;

[0093] The fixing component is fixed to the seat belt fastener bracket; and

[0094] The load-bearing part is fixed to the upper rail and bears the upward load acting on the fixing member when the rotating plate is in the seated position.

[0095] The limiting part has:

[0096] The opposing portion, and the rear end of the seat belt fastener bracket facing each other in the front-to-back direction when the rotating plate is in the seated position; and

[0097] The claw portion is connected to the opposing portion and is located above the rear end portion of the seat belt fastener bracket when the rotating plate is in the seated position.

[0098] In this seat rotation device, the upward load input from the seat belt fastener to the seat belt fastener bracket is borne by the claw portion of the limiting part and by the load-bearing part via the fixing member. Therefore, the lifting of the rotating plate from the seat slide is suppressed. Furthermore, since the opposing portion of the limiting part faces the rear end of the seat belt fastener bracket, the fore-aft position of the rotating plate at the seated position is effectively determined.

[0099] (Method 2)

[0100] According to the seat rotation device described in method 1, wherein...

[0101] The fixing member includes a base disposed below the seat belt fastener bracket.

[0102] The load-bearing part has:

[0103] The shaft portion has a shape extending upward from the upper track; and

[0104] The protruding portion has a shape that extends from the upper end of the shaft portion in a direction orthogonal to the shaft portion.

[0105] The base includes an overlapping portion that does not interfere with the shaft portion and the protrusion portion when the rotating plate moves between the seated position and the boarding / alighting position, and is located below the protrusion portion when the rotating plate is in the seated position.

[0106] (Method 3)

[0107] According to the seat rotation device described in method 2, wherein...

[0108] The rotating plate includes:

[0109] A side bracket, positioned above the seat slide and opposite the seatbelt retainer bracket in the width direction of the vehicle, and having a shape extending in the fore-and-aft direction; and

[0110] The rear tube connects the rear part of the seatbelt retainer bracket to the rear part of the side bracket.

[0111] The fixing member also includes a tube contact portion, which is connected to the base and contacts the rear tube from below.

[0112] In this configuration, the upward load acting on the seatbelt retainer bracket is borne by both the seatbelt retainer bracket and the side bracket via the rear tube, thus more reliably preventing the swivel plate from lifting off the seat slide.

[0113] (Method 4)

[0114] According to the seat rotation device of mode 2 or 3, the overlapping portion faces the shaft portion in the width direction when the rotating plate is in the seated position.

[0115] In this method, the position of the rotating plate relative to the width direction of the upper track when the rotating plate is in the seated position is determined.

[0116] (Method 5)

[0117] According to the seat rotation device described in method 1, wherein...

[0118] The fixing member has:

[0119] The shaft portion has a shape extending downward from the seatbelt fastener bracket; and

[0120] The protruding portion has a shape that extends from the lower end of the shaft portion in a direction orthogonal to the shaft portion.

[0121] The load-bearing portion includes an overlapping portion that does not interfere with the shaft portion and the protrusion portion when the rotating plate moves between the seated position and the boarding / alighting position, and is located above the protrusion portion when the rotating plate is in the seated position.

[0122] (Method 6)

[0123] According to the seat rotation device of Mode 5, the overlapping portion faces the shaft portion in the width direction when the rotating plate is in the seated position.

[0124] In this method, the position of the rotating plate relative to the width direction of the upper track when the rotating plate is in the seated position is determined.

[0125] While embodiments of the invention have been described, it should be considered that the embodiments disclosed herein are illustrative in all respects and not restrictive. The scope of the invention is indicated by the scope of the claims and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

Claims

1. A seat swivel device capable of moving a seat body in a front-rear direction of a vehicle and capable of rotating the seat body between a seating position in which the seat body faces a front of the vehicle and an embarking-disembarking position in which the seat body faces an opening portion of a door of the vehicle, wherein The seat rotating device includes: a seat slide for moving the seat body in a front-rear direction and 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 rotating plate fixed to a lower surface of the seat body in a manner not to relatively rotate with respect to the seat body and including a seat belt anchor bracket for a seat belt anchor to be fixed; a linking unit linking the base plate and the rotating plate in a manner that the rotating plate is rotatable with respect to the base plate between a seating position and an entry-exit position; a restriction portion fixed to the upper rail and restricting upward movement of the seat belt anchor bracket when the rotating plate is in the seating position; a fixing member fixed to the seat belt anchor bracket; and a load receiving portion fixed to the upper rail and receiving upward load acting on the fixing member when the rotating plate is in the seating position, the restriction portion has: a facing portion facing a rear end portion of the seat belt anchor bracket when the rotating plate is in the seating position in a front-rear direction; and a claw portion connected to the facing portion and positioned above the rear end portion of the seat belt anchor bracket when the rotating plate is in the seating position.

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

3. The seat rotating device according to claim 2, wherein the rotating plate includes: a side bracket disposed above the seat slide and at a position facing the seat belt anchor bracket in a width direction of the vehicle and having a shape extending in a front-rear direction; and a rear pipe linking the seat belt anchor bracket and a rear portion of the side bracket to each other, the fixing member further includes a pipe contact portion connected to the base portion and contacting the rear pipe from below.

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

5. The seat rotating device according to claim 1, wherein the fixing member has: a shaft portion having a shape extending downward from the seat belt anchor bracket; and a protruding portion having a shape protruding from a lower end portion of the shaft portion in a direction orthogonal to the shaft portion, the load receiving portion includes an overlapping portion that does not interfere with the shaft portion and the protruding portion when a rotating plate moves between the seating position and the entry-exit position and is positioned above the protruding portion when the rotating plate is in the seating position. ​ ​ ​ ​ 6. The seat swivel device according to claim 5, wherein The overlapping portion is opposite to the shaft portion in the width direction of the vehicle when the swivel plate is in the seating position.

Images