Vehicular seat

Abstract

To provide a vehicular seat provided with a rotating device, which is configured so that a seat cushion is surely prevented from floating up both at the times of front collision and rear collision.SOLUTION: A vehicular seat 1 comprises a seat main body 5, a slide device 7 and a rotating device 6. The slide device has a pair of left and right lower rails 17 joined to a floor, and upper rails 18 jointed to the lower rails respectively slidably movably. The rotating device rotatably connects the slide device to the seat main body, which comprises a shaft member 37 constituting a rotating shaft, and a peeling prevention mechanism 75 that restricts the seat main body from moving upward with respect to the slide device. The shaft member connects either of the left and right upper rails to the seat main body. The peeling prevention mechanism includes a pair of one-side peeling prevention parts 75R arranged at front and rear sides of the shaft member. Each of the one-side peeling prevention parts prevents the either of the left and right upper rails from peeling from the seat main body.SELECTED DRAWING: Figure 3

Description

[Technical field]

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

[0002] Patent Document 1 discloses a vehicle seat that is slidable back and forth relative to a floor and rotatable about a vertical axis perpendicular to the floor.

[0003] The vehicle seat includes a pair of left and right lower rails, a pair of left and right upper rails, a support plate, and a pair of electric motors. The lower rails extend forward and backward, are arranged parallel to each other, and are fixed to the floor. The upper rails are connected to the corresponding lower rails so as to be slidable forward and backward. The left upper rail is provided with a pivot pin that protrudes upward.

[0004] The support plate has a hole for receiving the pivot pin, and is coupled to the left upper rail for rotation about the pivot pin.

[0005] The electric motors are provided to slide the corresponding upper rails relative to the lower rails. By controlling the electric motors independently, one upper rail can be slid forward and the other upper rail can be slid backward. The electric motors are each housed inside the floor.

[0006] A guide mechanism is provided between the support plate and the upper rail to rotate the support plate according to the relative positions of the left and right upper rails. The guide mechanism includes a pair of front and rear guide pins on the right upper rail, one pin on the left upper rail, and three guide slots on the support plate to receive the respective pins.

[0007] The guide pin on the left upper rail is located forward of the pivot pin. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] US Patent Application Publication No. 2014 / 0138997 Summary of the Invention [Problem to be solved by the invention]

[0009] During a frontal or rear collision, a load that tends to lift the front or rear of the seat cushion may be applied to the vehicle seat. In response to this, the inventors of the present application came up with a configuration in which the upper end of the guide pin is hooked to the edge of the guide slot in the vehicle seat of Patent Document 1. However, even when such a configuration is adopted, when a load that tends to lift the rear of the seat cushion is applied, the load is concentrated on the pivot pin, making it difficult to prevent the seat cushion from lifting up.

[0010] In view of the above background, an object of the present invention is to more reliably prevent a seat cushion from floating up in a vehicle seat equipped with a rotation device in both a frontal collision and a rear collision. [Means for solving the problem]

[0011] In order to solve the above-mentioned problems, one aspect of the present invention is a vehicle seat (1), comprising: a seat body (5) having a seat cushion (11) and a seat back (12); a sliding device (7) provided between a floor (3) and the seat cushion; and a rotating device (6) provided between the sliding device and the seat cushion, wherein the sliding device has a pair of left and right lower rails (17) connected to the floor, and upper rails (18) slidably connected to each of the lower rails, and the rotating device rotatably connects the sliding device and the seat body, and comprises a shaft member (37) constituting a rotating shaft, and a peeling prevention mechanism (75) that restricts the seat body from moving upward relative to the sliding device, wherein the shaft member connects one of the left and right upper rails and the seat body, and the peeling prevention mechanism includes a pair of one-side peeling prevention portions arranged at the front and rear of the shaft member, and each of the one-side peeling prevention portions (75R) prevents peeling between one of the left and right upper rails and the seat body.

[0012] According to this aspect, the one-side peel-off prevention portion that restricts the upward movement of the seat body is disposed in front of and behind the shaft member that constitutes the rotating shaft. Therefore, the lifting of the seat cushion is restricted by the peel-off prevention mechanism in both a frontal collision and a rear collision. Therefore, the lifting of the seat cushion can be more reliably prevented in both a frontal collision and a rear collision.

[0013] In the above aspect, preferably, the shaft member connects the upper rail located on the vehicle outer side and the seat main body.

[0014] According to this aspect, the rigidity of the vehicle seat on the outer side can be increased by the shaft member.

[0015] In the above aspect, preferably, the peel-off prevention mechanism includes an other-side peel-off prevention portion (75L) at the other of the upper rails that prevents peeling between the other of the left and right upper rails and the seat body, and the one-side peel-off prevention portion and the other-side peel-off prevention portion each include a hanging portion (76) and a hooked portion (77) that is hooked to the hanging portion.

[0016] According to this aspect, the peeling prevention mechanism can be configured simply.

[0017] In the above aspect, preferably, the peel-off prevention mechanism includes an other-side peel-off prevention portion (75L) on the other side of the upper rail that prevents peeling between the other of the left and right upper rails and the seat body, and the other-side peel-off prevention portion extends in the front-to-rear direction on the left and right sides of the shaft member on the other side of the upper rail.

[0018] According to this aspect, the vehicle seat can be reinforced in the front-rear direction by the other-side peel-off prevention portion.

[0019] In the above aspect, preferably, each of the one-side peeling prevention portions is disposed on one side of the upper rail so as to extend in the left-right direction.

[0020] According to this aspect, the vehicle seat can be reinforced in the left-right direction by the one-side peel-off prevention portion.

[0021] In the above aspect, preferably, the rotation device has a lower member (35) fixed to the upper surface of the upper rail and an upper member (36) rotatably connected to the lower member via the shaft member, the upper member extending in the fore-and-aft direction along one side of the upper rail and comprising a one-side frame (41) connected to one side of the upper rail via the shaft member, an other-side frame (42) extending in the fore-and-aft direction along the other side of the upper rail above the other side of the upper rail, and a connecting frame (40) connecting the one-side frame and the other-side frame, the one-side frame and the other-side frame are provided with connecting pieces (46, 50) extending inwardly to the left and right, a locking device (68) for prohibiting rotation of the upper member is provided between the connecting piece of the other-side frame and the lower member, and the fore-and-aft width of the connecting piece of the other-side frame is larger than the fore-and-aft width of the connecting piece of the one-side frame.

[0022] According to this aspect, the rigidity of the connection piece on which the locking device is provided can be increased.

[0023] In the above aspect, preferably, the locking device has a striker (70) provided on the lower member, and a latch device (69) provided on the connecting piece of the other-side frame for engaging and disengaging with the striker, and the connecting piece of the other-side frame is provided with a notch (74) for receiving the striker.

[0024] According to this aspect, the overlap between the connection piece and the latch device in the vertical direction can be increased, so that the latch device can be protected.

[0025] In the above aspect, preferably, a fixed bracket (52) is coupled to each of the one-side frame and the other-side frame, the fixed bracket (52) being connected to the seat cushion and extending in the front-rear direction.

[0026] According to this aspect, the one-side frame and the other-side frame can be connected to the seat cushion, and the one-side frame and the other-side frame can be reinforced in the front-rear direction by the bracket.

[0027] In the above aspect, preferably, a rattle suppression mechanism (90) is provided between the other side frame and the lower member, and the rattle suppression mechanism includes a protrusion (91), an elastic member (93) provided on the protrusion and capable of elastic deformation, and a sliding contact portion (92) with which the protrusion slides, and at least one of the protrusion and the sliding contact portion forms an arc shape centered on the shaft member.

[0028] According to this aspect, it is possible to prevent rattling that may occur when the seat body is rotated.

[0029] In the above aspect, the lower member preferably includes a pair of left and right lower brackets (38) extending along each of the upper rails.

[0030] According to this aspect, the vehicle seat can be made lighter in weight than when the lower member is configured from a single plate member that spans the left and right upper rails. Effect of the Invention

[0031] One aspect of the present invention is a vehicle seat (1), comprising: a seat body (5) having a seat cushion (11) and a seat back (12); a sliding device (7) provided between a floor (3) and the seat cushion; and a rotating device (6) provided between the sliding device and the seat cushion, wherein the sliding device has a pair of left and right lower rails (17) connected to the floor, and upper rails (18) slidably connected to each of the lower rails, and the rotating device rotatably connects the sliding device and the seat body and comprises a shaft member (37) constituting a rotation shaft, and a peeling prevention mechanism (75) that restricts the seat body from moving upward relative to the sliding device, wherein the shaft member connects one of the left and right upper rails and the seat body, and the peeling prevention mechanism includes a pair of one-side peeling prevention portions arranged at the front and rear of the shaft member, and each of the one-side peeling prevention portions (75R) prevents peeling between one of the left and right upper rails and the seat body.

[0032] According to this aspect, the one-side peel-off prevention portion that restricts the upward movement of the seat body is disposed in front of and behind the shaft member that constitutes the rotating shaft. Therefore, the lifting of the seat cushion is restricted by the peel-off prevention mechanism in both a frontal collision and a rear collision. Therefore, the lifting of the seat cushion can be more reliably prevented in both a frontal collision and a rear collision.

[0033] In the above aspect, preferably, the shaft member connects the upper rail located on the vehicle outer side and the seat main body.

[0034] According to this aspect, the rigidity of the vehicle seat on the outer side can be increased by the shaft member.

[0035] In the above aspect, preferably, the peel-off prevention mechanism includes an other-side peel-off prevention portion (75L) at the other of the upper rails that prevents peeling between the other of the left and right upper rails and the seat body, and the one-side peel-off prevention portion and the other-side peel-off prevention portion each include a hanging portion (76) and a hooked portion (77) that is hooked to the hanging portion.

[0036] According to this aspect, the peeling prevention mechanism can be configured simply.

[0037] In the above aspect, preferably, the peel-off prevention mechanism includes an other-side peel-off prevention portion (75L) on the other side of the upper rail that prevents peeling between the other of the left and right upper rails and the seat body, and the other-side peel-off prevention portion extends in the front-to-rear direction on the left and right sides of the shaft member on the other side of the upper rail.

[0038] According to this aspect, the vehicle seat can be reinforced in the front-rear direction by the other-side peel-off prevention portion.

[0039] In the above aspect, preferably, each of the one-side peeling prevention portions is disposed on one side of the upper rail so as to extend in the left-right direction.

[0040] According to this aspect, the vehicle seat can be reinforced in the left-right direction by the one-side peel-off prevention portion.

[0041] In the above aspect, preferably, the rotation device has a lower member (35) fixed to the upper surface of the upper rail and an upper member (36) rotatably connected to the lower member via the shaft member, the upper member extending in the fore-and-aft direction along one side of the upper rail and comprising a one-side frame (41) connected to one side of the upper rail via the shaft member, an other-side frame (42) extending in the fore-and-aft direction along the other side of the upper rail above the other side of the upper rail, and a connecting frame (40) connecting the one-side frame and the other-side frame, the one-side frame and the other-side frame are provided with connecting pieces (46, 50) extending inwardly to the left and right, a locking device (68) for prohibiting rotation of the upper member is provided between the connecting piece of the other-side frame and the lower member, and the fore-and-aft width of the connecting piece of the other-side frame is larger than the fore-and-aft width of the connecting piece of the one-side frame.

[0042] According to this aspect, the rigidity of the connection piece on which the locking device is provided can be increased.

[0043] In the above aspect, preferably, the locking device has a striker (70) provided on the lower member, and a latch device (69) provided on the connecting piece of the other-side frame for engaging and disengaging with the striker, and the connecting piece of the other-side frame is provided with a notch (74) for receiving the striker.

[0044] According to this aspect, the overlap between the connection piece and the latch device in the vertical direction can be increased, so that the latch device can be protected.

[0045] In the above aspect, preferably, a fixed bracket (52) is coupled to each of the one-side frame and the other-side frame, the fixed bracket (52) being connected to the seat cushion and extending in the front-rear direction.

[0046] According to this aspect, the one-side frame and the other-side frame can be connected to the seat cushion, and the one-side frame and the other-side frame can be reinforced in the front-rear direction by the bracket.

[0047] In the above aspect, preferably, a rattle suppression mechanism (90) is provided between the other side frame and the lower member, and the rattle suppression mechanism includes a protrusion (91), an elastic member (93) provided on the protrusion and capable of elastic deformation, and a sliding contact portion (92) with which the protrusion slides, and at least one of the protrusion and the sliding contact portion forms an arc shape centered on the shaft member.

[0048] According to this aspect, it is possible to prevent rattling that may occur when the seat body is rotated.

[0049] In the above aspect, the lower member preferably includes a pair of left and right lower brackets (38) extending along each of the upper rails.

[0050] According to this aspect, the vehicle seat can be made lighter in weight than when the lower member is configured from a single plate member that spans the left and right upper rails. [Brief description of the drawings]

[0051] [Figure 1] FIG. 1 is a perspective view of a vehicle seat according to an embodiment; [Diagram 2] FIG. 1 is a perspective view of a rotating device and a sliding device with a cover member and a fixing bracket omitted; [Diagram 3] FIG. 1 is a side view of a rotating device and a sliding device with a cover member and a fixing bracket omitted. [Figure 4] 1A is a perspective view, FIG. 1B is a top view, and FIG. 1C is a side view of a portion where a cover member of a sliding device and a rotating device is provided. [Diagram 5] Exploded perspective view of the rotating device [Figure 6] FIG. 1 is a top view of the rotating device and the sliding device including the cover member and the fixing bracket. [Figure 7] FIG. 1 is a perspective view of the left portion (inner side portion) of the rotation device and the slide device with the fixing bracket omitted; [Figure 8]FIG. 13 is a perspective view showing a portion where a locking device for a rotation device is provided. [Figure 9] FIG. 13 is a perspective view showing a front part of the vehicle exterior peeling prevention part [Figure 10] (A) A perspective view of the left front portion of the rotation device, and (B) a side view of the front wheel bracket. [Figure 11] FIG. 1 is a top view of a rotation device and a sliding device when the seat body is in a rotation position; [Figure 12] FIG. 1 is a side view of a rotation device and a sliding device when the seat body is in a rotated position; [Figure 13] FIG. 1 is a front view of a rotation device and a sliding device when the seat body is in a rotated position; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0052] Hereinafter, an embodiment in which the vehicle seat according to the present invention is applied to a seat of a vehicle such as an automobile will be described with reference to the drawings. In other embodiments, the vehicle seat may be applied to a seat of other vehicles such as a train, an airplane, or a ship.

[0053] As shown in FIG. 1, a vehicle seat 1 is placed on a floor 3 that defines a passenger compartment (i.e., a vehicle interior 2) of a vehicle. In this embodiment, a case will be described in which the vehicle seat 1 constitutes a driver's seat. In addition, unless otherwise specified, the following description will be based on a state in which the vehicle seat 1 faces the front of the vehicle, and will use the front-rear, left-right, and up-down directions of the vehicle. In the following embodiment, the right side of the vehicle seat 1 corresponds to the outside of the vehicle, and the left side of the vehicle seat 1 corresponds to the inside of the vehicle.

[0054] The vehicle seat 1 has a seat body 5, a rotation device 6, and a sliding device 7. The sliding device 7 is connected to a floor 3. The rotation device 6 is connected to an upper surface of the sliding device 7, and is connected to the floor 3 via the sliding device 7. The seat body 5 is connected to an upper surface of the rotation device 6, and is connected to the floor 3 via the rotation device 6 and the sliding device 7.

[0055] The slide device 7 connects the rotation device 6 and the seat body 5 to the floor 3 so that they can slide back and forth. The rotation device 6 connects the seat body 5 to the slide device 7 so that it can rotate about an axis X (central axis) extending in the vertical direction. As a result, the seat body 5 is connected to the floor 3 so that it can slide back and forth and rotate about the axis X extending in the vertical direction.

[0056] The seat body 5 has a seat cushion 11, a seat back 12, and a headrest 13. The seat cushion 11 is shaped like a rectangular parallelepiped with a surface facing approximately in the vertical direction, and supports the user's buttocks from below. The seat back 12 is shaped like a rectangular parallelepiped with a surface facing approximately in the front-rear direction, and extends upward from the rear of the seat cushion 11. The seat back 12 supports the user's back from behind. The headrest 13 is connected to an upper part of the seat back 12. The headrest 13 supports the user's head from behind.

[0057] The seat cushion 11 has a seat cushion frame (not shown) forming a skeleton, a pad (not shown) supported by the seat cushion frame, and a skin material (not shown) covering the surface of the pad. Like the seat cushion 11, the seat back 12 has a seat back frame (not shown) forming a skeleton, a pad (not shown) supported by the seat back frame, and a skin material (not shown) covering the surface of the pad. The lower end of the seat back frame is connected to the rear end of the corresponding seat cushion frame via a reclining device (not shown). A buckle 15 is provided at the rear end of the inner edge of the seat cushion 11 for inserting and fixing the tongue of a seat belt.

[0058] A resin side cover 16 may be provided on the side surface of the seat cushion 11 facing the vehicle interior. In addition, a reclining lever (not shown) for adjusting the reclining angle of the seat back 12 may be provided on the vehicle interior side of the seat cushion 11. The reclining lever constitutes a part of the reclining device and receives operational input from the user.

[0059] The slide device 7 is provided between the floor 3 and the seat cushion 11. As shown in FIG 2, the slide device 7 has a pair of left and right lower rails 17, a pair of left and right upper rails 18, a holding frame 19, a drive device 20 (also referred to as a drive source), and a drive mechanism 21.

[0060] The lower rails 17 are arranged at intervals on the left and right. Each of the lower rails 17 is arranged to extend in the front-rear direction and is connected to the floor 3 via feet 17A provided at the front and rear ends. The feet 17A may be fastened to the floor 3, thereby fixing the lower rails 17 to the floor 3.

[0061] The left upper rail 18 is slidably coupled to an upper side of the left lower rail 17, and the right upper rail 18 is slidably coupled to an upper side of the right lower rail 17. In this way, the upper rails 18 are supported on the corresponding lower rails 17 so as to be slidable back and forth.

[0062] The holding frame 19 holds the drive unit 20 on the left and right lower rails 17. As shown in Fig. 3, the holding frame 19 extends in the left-right direction (also called the seat width direction) and is fixed at both ends to the lower rails 17. In this way, the holding frame 19 is suspended between the left and right lower rails 17.

[0063] The drive unit 20 generates power for sliding the upper rail 18 relative to the lower rail 17. The drive unit 20 is constituted by an electric motor 20A. The drive unit 20 is coupled to the holding frame 19 and supported by the lower rail 17 via the holding frame 19. In this embodiment, a holding recess 19A recessed downward is provided in the approximate center of the holding frame 19 in the front-rear direction, and the electric motor 20A is housed in the holding recess 19A. In this way, the holding frame 19 supports the drive unit 20 from below.

[0064] In addition, the electric motor 20A may be fixed to the holding frame 19 by screws or the like, or the electric motor 20A may be connected to the holding frame 19 by being engaged with a locking means such as a locking claw (not shown) provided on the underside of the holding frame 19.

[0065] As shown in Figs. 2 to 4, the holding frame 19 is provided with a cover member 22 that covers the drive unit 20 from above. As shown in Fig. 4(A), the cover member 22 has a main surface facing the up-down direction, and includes a rectangular plate-shaped cover main portion 22A extending in the left-right direction, a front flange portion 22B extending downward from a front edge of the cover main portion 22A, and a rear flange portion 22C extending downward from a rear edge of the cover main portion 22A. As shown in Figs. 4(A) and 4(B), a bulging portion 23 that bulges upward is provided in the left half portion (portion facing the vehicle interior) of the cover main portion 22A. The bulging portion 23 defines an accommodation chamber 24 (see Fig. 2) at its lower portion, which is a space for accommodating the electric motor 20A.

[0066] The bulging portion 23 has a lower flat portion 25 and an upper flat portion 26, each of which is horizontal on its upper surface. The upper flat portion 26 is provided at the center in the front-to-rear direction and on the left edge of the lower flat portion 25. The upper flat portion 26 and the lower flat portion 25 are connected by an inclined portion 27 having an inclined surface. As a result, a step portion 29 (see FIG. 4(B)) is formed on the left edge of the upper surface of the holding frame 19. A protrusion 30 that protrudes upward is provided at the center in the front-to-rear direction of the upper flat portion 26. The protrusion 30 extends from the center in the left-to-right direction of the upper flat portion 26 to its left edge.

[0067] A recess 31 recessed downward is provided on the upper surface of the bulging portion 23, behind the protrusion 30. A flat horizontal surface 32 that is approximately horizontal is provided on the lower part of the recess 31 (i.e., the portion on the upper surface of the bulging portion 23, behind the protrusion 30).

[0068] The drive mechanism 21 converts the power generated by the drive device 20 into a sliding motion of the upper rail 18. The drive mechanism 21 includes a feed screw and a nut member (not shown) and a gear unit 33. The drive mechanisms 21 may be provided on the left and right upper rails 18, respectively.

[0069] The feed screw is composed of a ball screw. The feed screw is disposed so as to extend forward and backward within the corresponding lower rail 17. A feed screw bracket (not shown) is fixed to the lower rail 17, and the feed screw is rotatably supported by the lower rail 17 by the feed screw bracket.

[0070] The nut member is fitted to the approximate center of the feed screw in the front-rear direction. The nut member is fixed to the upper rail 18 by a bolt or the like. The gear unit 33 appropriately reduces the speed of rotation of the rotating shaft of the drive device 20 (electric motor 20A) and transmits it to the feed screw.

[0071] When the drive unit 20 is driven, the rotation of the output shaft is transmitted to the feed screw by the gear unit 33, causing the feed screw to rotate. This changes the fitting position between the feed screw and the nut member, causing the upper rail 18 to slide in the front-rear direction relative to the lower rail 17. In other words, the drive unit 20 and the drive mechanism 21 constitute a single-axis actuator that causes the upper rail 18 to slide relative to the lower rail 17. When the drive unit 20 stops, the sliding movement of the upper rail 18 relative to the lower rail 17 is restricted.

[0072] The rotation device 6 is provided between the floor 3 and the seat body 5. In this embodiment, the rotation device 6 is provided between the slide device 7 and the seat cushion 11.

[0073] The rotation device 6 supports the seat body 5 so as to be rotatable about an axis X extending in the up-down direction relative to the floor 3. As shown in Fig. 1, the axis X is provided at approximately the center of the seat cushion 11 in the front-rear direction and offset toward the outer side of the vehicle in the left-right direction (the right side in Fig. 1).

[0074] The seat body 5 can be displaced by rotation around the axis X by the rotation device 6 (see the arrow in FIG. 1 ) between an initial position (also called a first position) in which the seat back 12 faces forward and a rotated position (also called a second position) in which the seat back 12 faces slightly toward the outside of the vehicle after rotating clockwise from the initial position when viewed from above. When the user rotates the seat body 5 from the initial position to the rotated position, it becomes easy for the user to get on and off the seat body 5. The rotation of the seat body 5 is limited to an angle range of about 10 degrees clockwise from the initial position in which the seat back 12 faces forward.

[0075] As shown in Figures 2 and 5, the rotation device 6 comprises a lower member 35 (also called a base portion), an upper member 36 (also called a rotating portion), and an axis member 37 that rotatably connects the upper member 36 to the lower member 35.

[0076] The lower member 35 is provided closer to the floor 3, i.e., lower, than the upper member 36. In this embodiment, the lower member 35 is connected to the floor 3 via the slide device 7. In this embodiment, an example in which the lower member 35 is configured as a separate member from the slide device 7 will be described. However, the lower member 35 may also configure a part of the slide device 7.

[0077] The lower member 35 includes a pair of left and right lower brackets 38. Each of the lower brackets 38 extends along the corresponding upper rail 18 and in the front-rear direction. Each of the lower brackets 38 is coupled to the corresponding upper rail 18. That is, the left lower bracket 38 is disposed so as to overlap the left upper rail 18 from above, and is fixed to the upper surface of the left upper rail 18. The right lower bracket 38 is disposed so as to overlap the right upper rail 18 from above, and is fixed to the upper surface of the right upper rail 18.

[0078] In this way, by constructing the lower member 35 with a lower bracket 38 extending along the corresponding upper rail 18, the vehicle seat 1 can be made lighter than if it were constructed with a single plate member spanning the left and right upper rails 18.

[0079] The lower brackets 38 may be fixed to the corresponding upper rails 18 by screws. As long as the lower brackets 38 are fixed to the upper rails 18, the lower brackets 38 may be coupled to the upper rails 18 in any manner.

[0080] In this embodiment, the lower brackets 38 each have a flat plate portion 38A extending in the front-rear direction. The flat plate portion 38A extends further inward and outward from the seat than the corresponding upper rail 18 and lower rail 17. A flange-shaped inner flange portion 38B extending downward is provided on the seat inner edge portion (the edge portion on the inner side of the seat in the left-right direction) of the flat plate portion 38A. A flange-shaped outer flange portion 38C extending downward is provided on the seat outer edge portion of the flat plate portion 38A.

[0081] The upper member 36 has a pair of left and right upper frames 39 and a connecting frame 40 that connects the left and right upper frames 39 together.

[0082] For ease of explanation, of the pair of left and right upper frames 39, the upper frame 39 located on the vehicle outer side (right side) will be referred to as one-side frame 41, and the upper frame 39 located on the vehicle inner side (left side) will be referred to as the other-side frame 42. The one-side frame 41 corresponds to the upper frame 39 of the pair of left and right upper frames 39 located on the side where the axis X, which is the rotation axis of the seat main body 5, is provided.

[0083] 3 and 5, the one-side frame 41 includes a one-side main portion 45 extending in the front-rear direction, and a one-side connection piece 46 extending from the right plate portion toward the inside of the seat (left side). A through hole 45A for accommodating the shaft member 37 is provided at approximately the center in the front-rear direction of the one-side main portion 45. The one-side connection piece 46 extends from approximately the center in the front-rear direction of the one-side main portion 45 toward the inside of the seat in the left-right direction (left-right inward).

[0084] In this embodiment, the one-side frame 41 is composed of a front member 45B constituting the front end of the one-side main part 45, a rear member 45C constituting the rear end of the one-side main part 45, and a middle member 45D constituting the central part of the one-side main part 45 and the one-side connecting piece 46. The front member 45B, the rear member 45C and the middle member 45D are each composed of a sheet metal member having a main surface facing in the vertical direction, and the front member 45B and the rear member 45C are respectively joined to the front edge and the rear edge of the upper surface of the middle member 45D by welding or the like.

[0085] The lower surface of the front member 45B and the lower surface of the rear member 45C are each located higher than the lower surface of the middle member 45D. The vertical gap between the lower surfaces of the front member 45B and the rear member 45C and the lower bracket 38 is larger than the vertical gap between the lower surface of the middle member 45D and the lower bracket 38.

[0086] 3 and 5, the other-side frame 42 includes an other-side main portion 49 extending in the front-rear direction, and an other-side connection piece 50 extending from the other-side main portion 49 toward the inside (right side) of the seat. The other-side connection piece 50 extends from the front end of the other-side main portion 49 toward the inside of the seat in the left-right direction.

[0087] In this embodiment, the other-side frame 42 is configured from a single sheet metal member having a main surface facing in the vertical direction.

[0088] As shown in Fig. 6, fixed brackets 52 are coupled to the upper surfaces of the upper frames 39 (one-side frame 41 and the other-side frame 42), respectively. The fixed brackets 52 are made of sheet metal members and extend in the front-rear direction along the upper surfaces of the corresponding upper frames 39. The fixed brackets 52 connect the upper frames 39 (one-side frame 41 and the outer frame) to the seat cushion 11, and couple the seat body 5 to the rotation device 6. By providing the fixed brackets 52 on the one-side frame 41 and the other-side frame 42, respectively, the one-side frame 41 and the other-side frame 42 can be reinforced in the front-rear direction.

[0089] The connecting frame 40 is disposed between the two fixed brackets 52. Therefore, interference between the connecting frame 40 and the fixed brackets 52 can be avoided.

[0090] As shown in Fig. 6, the connecting frame 40 is disposed so as to extend generally in the left-right direction. As shown in Fig. 3, the connecting frame 40 is disposed so as to overlap the one-side connecting piece 46 at one end (right end), and is joined to the one-side connecting piece 46 at one end. The connecting frame 40 is disposed so as to overlap the other-side connecting piece 50 at the other end (left end), and is joined to the other-side connecting piece 50 at the other end. In this way, the connecting frame 40 connects the one-side connecting piece 46 (the connecting piece of the one-side frame 41) and the other-side connecting piece 50 (the connecting piece of the other-side frame 42).

[0091] In this embodiment, a bolt hole 54 is provided in each of the one-side connection piece 46 and the other-side connection piece 50. A through hole 55 is provided in each of the left and right ends of the connecting frame 40 at a position overlapping the bolt hole 54. The one-side connection piece 46 and the connecting frame 40 are fastened together by a bolt 56 and a nut 57 inserted through the bolt hole 54 of the one-side connection piece 46 and the through hole 55 of the connecting frame 40, and the other-side connection piece 50 and the connecting frame 40 are fastened together by a bolt 56 and a nut 57 inserted through the bolt hole 54 of the other-side connection piece 50 and the through hole 55 of the connecting frame 40.

[0092] 3 and 6, the one-side frame 41 and the other-side frame 42 are connected by a connecting frame 40. At this time, the connecting frame 40 is located on the seat inner side (i.e., on the right side) of the left outer edge of the left lower rail 17 in a top view, and is located on the seat inner side (i.e., on the left side) of the right outer edge of the right lower rail 17. In other words, the connecting frame 40 is located on the seat inner side of the left and right outer edges of the pair of left and right lower rails 17.

[0093] It is preferable that the connecting frame 40 overlaps the upper rail 18 from above at either the left or right outer edge. In this way, the upper rail 18 is reinforced by the connecting frame 40.

[0094] In particular, it is preferable that the outer end (right end) of the connecting frame 40 overlaps from above with the upper rail 18. This allows the connecting frame 40 to overlap the upper rail 18 to which the one-side frame 41 is connected via the shaft member 37, and reinforces the upper rail 18 located on the side where the rotating shaft is provided (the outer side of the vehicle).

[0095] 3, the shaft member 37 is disposed so as to overlap one of the pair of left and right upper rails 18 in top view. In this embodiment, the shaft member 37 is disposed so as to overlap the upper rail 18 located on the vehicle interior side.

[0096] The shaft member 37 rotatably connects the slide device 7 and the seat body 5, and constitutes a rotation axis of the slide device 7 and the seat body 5. More specifically, the shaft member 37 rotatably connects a lower bracket 38 located on the vehicle exterior side to an upper frame 39 located on the vehicle exterior side. As a result, the shaft member 37 rotatably connects one side of the upper rail 18 (more specifically, the upper rail 18 located on the vehicle exterior side) to the seat body 5. The shaft member 37 connects the seat body 5 to the slide rail rotatably about the central axis of the shaft member 37 extending in the vertical direction as an axis X (also referred to as a rotation axis) (see FIG. 3).

[0097] In this manner, the shaft member 37 is arranged to overlap the upper rail 18 located on the vehicle exterior side, and is configured to connect the lower bracket 38 and upper frame 39 located on the vehicle exterior side, thereby reinforcing the vehicle exterior side portion of the vehicle seat 1. This makes it possible to increase the rigidity of the vehicle exterior side portion of the vehicle seat 1. In this embodiment, the shaft member 37 rotatably connects the central portion in the front-rear direction of the lower bracket 38 located on the vehicle exterior side to the upper frame 39 located on the vehicle exterior side.

[0098] In this embodiment, the shaft member 37 is a metal member and has a columnar shape extending vertically. As shown in Fig. 5, the shaft member 37 has a cylindrical large diameter portion 60 constituting a lower half portion and a cylindrical small diameter portion 61 constituting an upper half portion. The diameter of the small diameter portion 61 is smaller than the diameter of the large diameter portion 60. The large diameter portion 60 is joined at its lower end to the lower bracket 38 at approximately the center in the front-rear direction. The upper frame 39 on the outer side of the vehicle is provided with an axle receiving hole 62 for receiving the small diameter portion 61 at approximately the center in the front-rear direction. The small diameter portion 61 is inserted into the axle receiving hole 62 and a washer 63 (Fig. 5), and the lower bracket 38 on the outer side and the upper frame 39 on the outer side are rotatably connected.

[0099] <Rolling components> As shown in Fig. 7, wheels 65 are provided on the underside of the upper member 36. The wheels 65 roll (rotate) to function as rolling members that cause the upper member 36 to move rotationally about the shaft member 37 relative to the lower member 35. The upper member 36 is supported by the lower member 35 via the shaft member 37 and the wheels 65. By providing the wheels 65 on the underside of the upper member 36 in this way, it is possible to prevent the generation of abnormal noise between the upper member 36 and the lower member 35 when the seat main body 5 rotates.

[0100] In this embodiment, wheels 65 are provided between the lower bracket 38 on the vehicle interior side (left side) and the upper frame 39 on the vehicle interior side (left side) (i.e., the other-side frame 42). The wheels 65 are arranged at the front and rear of the underside of the upper frame 39 on the vehicle interior side. The wheels 65 are rollably (rotatably) coupled to wheel mounting brackets 66 (also called roller brackets). The wheel mounting brackets 66 are fastened to the underside of the upper frame 39 on the vehicle exterior side, so that the wheels 65 are supported by the underside of the upper frame 39 on the vehicle exterior side.

[0101] 3 and 7, the wheels 65 and the wheel mounting bracket 66 are provided, respectively, at the front end and the rear end of the lower surface of the other-side frame 42. Hereinafter, the wheel mounting bracket 66 located on the front side will be referred to as the front wheel bracket 66F, and the wheel mounting bracket 66 located on the rear side will be referred to as the rear wheel bracket 66R.

[0102] In this way, by providing the wheels 65 between the other frame 42 (the upper frame 39 on the outer side of the vehicle) on which the shaft members 37 are not provided and the corresponding lower member 35, the upper member 36 can be stably supported relative to the lower member 35. Furthermore, the upper member 36 can be smoothly rotated relative to the lower member 35 while preventing the generation of abnormal noise and the like.

[0103] In this embodiment, the wheels 65 are provided on the upper frame 39, but the present invention is not limited to this. Any embodiment may be used as long as a rolling member that moves the upper member 36 relative to the lower member 35 by rolling is provided between the upper member 36 and the lower member 35, and for example, the wheels 65 may be provided on the lower bracket 38. The wheels 65 may be cylindrical or spherical. In this embodiment, the wheels 65 are provided only on the upper frame 39 on the inside (left side) of the vehicle, but the present invention is not limited to this embodiment, and the wheels 65 may be provided between the upper frame 39 on the outside of the vehicle and the lower bracket 38 on the outside of the vehicle, in addition to the inside of the vehicle.

[0104] <Locking device> The locking device 68 is provided between the upper member 36 and the lower member 35, and restricts the rotation of the upper member 36 relative to the lower member 35. In this embodiment, the locking device 68 is provided to restrict the rotation of the seat body 5 from the initial position and to maintain the seat body 5 in the initial position. In this embodiment, the locking device 68 is provided between the connection piece (other-side connection piece 50) of the upper frame 39 (i.e., the other-side frame 42) on the vehicle interior side and the lower bracket 38 on the vehicle interior side.

[0105] As shown in FIG. 3, the locking device 68 includes a latch device 69 provided on one of the upper member 36 and the lower member 35, and a striker 70 provided on the other of the upper member 36 and the lower member 35.

[0106] 8, a latch device 69 is provided on the upper member 36, and a striker 70 is provided on the lower member 35. In detail, the latch device 69 is coupled to the other side frame 42.

[0107] 3 and 8, the latch device 69 is disposed on the other-side connection piece 50 and the connecting frame 40 so as to overlap in the vertical direction. The latch device 69 is fastened to the other-side connection piece 50 together with the connecting frame 40 by a bolt 56 and a nut 57, and the latch device 69 is joined to the connection portion of the connecting frame 40 and the other-side connection piece 50.

[0108] The front-to-rear width of the connection piece (other-side connection piece 50) of the upper frame 39 on the vehicle interior side is larger than the front-to-rear width of the connection piece (one-side connection piece 46) of the upper frame 39 on the vehicle exterior side. This makes it possible to increase the rigidity of the connection piece on which the latch device 69 is provided, i.e., the other-side connection piece 50, compared to when the front-to-rear width of the connection piece on the vehicle exterior side is equal to or smaller than the front-to-rear width of the connection piece on the vehicle interior side.

[0109] The striker 70 is connected to the lower bracket 38 on the vehicle inner side via a support member 72. The support member 72 is connected to the inner edge (right edge) of the sheet of the lower bracket 38 located on the left side. In this embodiment, the support member 72 has a plate-shaped support portion 72A having a surface facing in the up-down direction, and a connection portion 72B extending upward along the left edge of the support portion 72A. The connection portion 72B is welded to the inner edge of the sheet of the lower bracket 38 located on the left side, whereby the support member 72 is connected to the lower bracket 38. The striker 70 is connected to the upper surface of the support portion 72A.

[0110] When the seat main body 5 is in the initial position, the striker 70 is located behind the one-side connecting piece 46. The one-side connecting piece 46 is provided with a notch 74 that is cut forward from its rear edge. When the seat main body 5 is in the initial position, the striker 70 is coupled to the latch device 69 with a part of the striker 70 received in the notch 74.

[0111] In this way, since the one-side connection piece 46 is provided with the notch 74, the overlap in the vertical direction between the one-side connection piece 46 and the latch device 69 can be made larger than when the one-side connection piece 46 is not provided with the notch 74. This makes it possible to protect the latch device 69.

[0112] The latch device 69 is provided with an operating wire (not shown). When a user operates an operating button or the like provided on the seat main body 5, the wire is pulled, and the connection between the latch device 69 and the striker 70 is released. The operating button for the latch device 69 may be provided on the left or right side surface of the seat cushion 11, for example.

[0113] <Peeling prevention mechanism> 2, a peeling prevention mechanism 75 is provided between the lower member 35 and the upper member 36. The peeling prevention mechanism 75 prevents the sheet body 5 from moving upward relative to the slide device 7. In detail, the peeling prevention mechanism 75 prevents the upper member 36 from peeling off from the lower member 35, thereby preventing the sheet body 5 from peeling off from the slide device 7.

[0114] The peeling prevention mechanism 75 is composed of a hooking portion 76 provided on the upper member 36 and a hooked portion 77 provided on the lower member 35 (see also FIG. 8). The hooked portion 77 is hooked on the hooking portion 76 from above, and the hooking portion 76 is hooked on the hooked portion 77 from below, thereby restricting the upward movement of the hooking portion 76. This allows a simple configuration of a mechanism for preventing the upper member 36 from peeling off from the lower member 35. As shown in FIG. 2 and FIG. 3, at least one of the hooking portion 76 and the hooked portion 77 is configured to form an arc shape centered on the central axis of the shaft member 37 (i.e., the rotation axis of the sheet main body 5). This makes it possible to prevent peeling regardless of the rotation angle of the sheet main body 5.

[0115] In the following, an example will be described in which a hooking portion 76 is provided on the upper member 36 and a hooked portion 77 is provided on the lower member 35, but the peel-prevention mechanism 75 may be of any type as long as it engages with the upper member 36 and the lower member 35 and prevents the upper member 36 and the lower member 35 from peeling away from each other.

[0116] In detail, the peeling prevention mechanism 75 includes an exterior peeling prevention portion 75R (also referred to as a one-side peeling prevention portion) that prevents peeling between the exterior upper frame 39 and the exterior lower bracket 38, and an interior peeling prevention portion 75L (also referred to as a other-side peeling prevention portion) that prevents peeling between the interior upper frame 39 and the exterior lower bracket 38. The exterior peeling prevention portion 75R is provided between the right upper frame 39 (one-side frame 41) and the right lower bracket 38, and prevents peeling of the seat body 5 from the exterior upper rail 18. The interior peeling prevention portion 75L is provided between the interior upper frame 39 (other-side frame 42) and the interior lower bracket 38 (right side), and prevents peeling of the seat body 5 from the interior upper rail 18.

[0117] The vehicle exterior peeling prevention portion 75R includes a front peeling prevention portion 80 provided in front of the shaft member 37, and a rear peeling prevention portion 81 provided behind the shaft member 37. The front peeling prevention portion 80 and the rear peeling prevention portion 81 are arranged in the front and rear directions around the shaft member 37, and face each other in the front and rear directions around the shaft member 37. The shaft member 37 is arranged between the front peeling prevention portion 80 and the rear peeling prevention portion 81.

[0118] 2, the front peeling prevention portion 80 is disposed to extend in the left-right direction in front of the shaft member 37. This makes it possible to reinforce the vehicle seat 1 in the left-right direction on the vehicle outer side.

[0119] 5 and 9, the front peeling prevention part 80 includes an upper front hook 83 (an example of an upper hook) joined to the underside of the upper frame 39 on the vehicle interior side, and a lower front hook 84 (an example of a lower hook) joined to the upper surface of the lower bracket 38 on the vehicle interior side. The upper front hook 83 and the lower front hook 84 are each formed of a rail-shaped sheet metal member. The upper front hook 83 and the lower front hook 84 extend substantially in the left-right direction in front of the shaft member 37, and form an arc shape with the shaft member 37 as the center.

[0120] The front and rear ends of the upper front hook 83 are provided with hooking portions 76A. The hooking portions 76A (also called J-hooks) are J-shaped in a side view. The lower front hook 84 is provided with hooked portions 77A at positions corresponding to the hooking portions 76A. The hooked portions 77A (also called eyelets) are inverted J-shaped. The hooking portions 76A are hooked from below to the hooked portions 77A, and the hooked portions 77A restrict the upward movement of the hooking portions 76A. This prevents the upper frame 39 on the outer side of the vehicle from peeling off (separating) from the lower bracket 38 on the outer side of the vehicle at the front portion of the shaft member 37.

[0121] 2 and 3, the edges of the upper front hook 83 and the lower front hook 84 on the inner side of the seat extend further toward the inner side of the seat than the edge of the outer upper rail 18 on the inner side of the seat. This allows the upper front hook 83 and the lower front hook 84 to be kept engaged over a wide range of seat rotation angles. This prevents the upper frame 39 on the inside and outside of the vehicle and the lower bracket 38 on the inner side of the vehicle from peeling off over a wide range of seat rotation angles. The edges of the upper front hook 83 and the lower front hook 84 on the outer side of the seat may be positioned so as to be generally aligned in the up-down direction with the edge of the outer upper rail 18 on the outer side of the seat.

[0122] 2, the rear peeling prevention portion 81 is disposed to extend in the left-right direction in front of the shaft member 37. This makes it possible to reinforce the vehicle seat 1 in the left-right direction on the vehicle outer side.

[0123] The rear peeling prevention portion 81 includes an upper rear hook 85 (an example of an upper hook) joined to the underside of the upper frame 39 on the vehicle interior side, and a lower rear hook 86 (an example of a lower hook) joined to the upper surface of the lower bracket 38 on the vehicle interior side. The upper rear hook 85 has approximately the same shape as the upper front hook 83, and the lower rear hook 86 has approximately the same shape as the lower front hook 84. The upper rear hook 85 and the lower rear hook 86 extend approximately in the left-right direction on the rear side of the shaft member 37, and form arc shapes with the shaft member 37 as their center.

[0124] The front and rear ends of the upper rear hook 85 are each provided with a hooking portion 76B that is J-shaped in side view, similar to the upper front hook 83. The front and rear ends of the lower rear hook 86 are each provided with a hooked portion 77B that is inverted J-shaped in side view, similar to the lower front hook 84. The hooking portions 76B are hooked to the hooked portions 77B from below, and the hooked portions 77B restrict the upward movement of the hooking portions 76B. This prevents separation (detachment) between the upper frame 39 on the vehicle interior side and the lower bracket 38 on the vehicle interior side, even in the rear portion of the shaft member 37.

[0125] The seat inner edge of the upper rear hook 85 and the lower rear hook 86 extends further toward the seat inner side than the seat inner edge of the upper rail 18. This makes it possible to prevent the upper frame 39 inside and outside the vehicle and the lower bracket 38 inside the vehicle from peeling off over a wide range of seat rotation angles, similar to the upper front hook 83 and the lower front hook 84. Note that the seat outer edge of the upper rear hook 85 and the lower rear hook 86 may be located in a position that is roughly aligned in the up-down direction with the seat outer edge of the upper frame.

[0126] The interior peeling prevention portion 75L is provided between the upper frame 39 located on the interior side of the vehicle and the lower bracket 38 located on the interior side of the vehicle. The interior peeling prevention portion 75L may extend in the front-rear direction on the left and right sides of the shaft member 37. The interior peeling prevention portion 75L is disposed so as to extend in an arc shape in the approximately front-rear direction along the upper rail 18 located on the interior side of the vehicle. This allows the interior peeling prevention portion 75L to reinforce the interior portion of the vehicle seat 1 in the front-rear direction.

[0127] The interior peeling prevention portion 75L is composed of a hooking portion 76 provided on each of the front wheel bracket 66F and the rear wheel bracket 66R which are connected to the underside of the upper frame 39 (other side frame 42) located on the interior side of the vehicle, and a hooked portion 77 provided on each of the support member 72 which supports the striker 70 of the locking device 68 and the outer rear hook 87 which is connected to the lower bracket 38 located on the exterior side of the vehicle.

[0128] As shown in Fig. 5, the hook portion 76C of the front wheel bracket 66F and the hook portion 76D of the rear wheel bracket 66R each extend substantially in the front-rear direction along the inner edge of the seat. These hook portions 76C, 76D reinforce the vehicle interior portion of the vehicle seat 1 in the front-rear direction. As shown in Fig. 10(A) and Fig. 10(B), each of the hook portions 76C, 76D extends downward from the lower surface of the corresponding upper frame 39, and then extends toward the inside of the seat, forming a substantially J-shape in cross section.

[0129] The hooked portion 77C of the support member 72 is provided on the seat outer edge of the support portion 72A. The hooked portion 77C is disposed along the seat inner edge of the lower bracket 38 located on the vehicle inner side.

[0130] The outer rear hook 87 is made of a sheet metal member. The outer rear hook 87 is disposed on the upper surface of the lower bracket 38 along the rear edge portion on the inner side of the seat. The outer rear hook 87 is joined to the upper surface of the lower bracket 38. The latched portion 77D is provided on the inner edge portion of the seat of the outer rear hook 87.

[0131] The hooked portions 77C, 77D are each substantially J-shaped and upside down in cross section. When the seat main body 5 is in the initial position, the hooking portion 76C of the front wheel bracket 66F is hooked to the hooked portion 77C of the support member 72, and the hooking portion 76D of the rear wheel bracket 66R is hooked to the hooked portion 77D of the outer rear hook 87. In this manner, the hooking portions 76 are hooked to the corresponding hooked portions 77, thereby preventing the upper frame 39 on the vehicle interior side from peeling off (separating) from the lower bracket 38 on the vehicle interior side.

[0132] In this way, by forming part of the vehicle exterior peeling prevention portion 75R using the brackets (front wheel bracket 66F, rear wheel bracket 66R) that support the wheels 65 and the support member 72 that supports the striker 70, there is no need to provide a separate member to form the vehicle exterior peeling prevention portion 75R, and the number of parts of the vehicle seat 1 can be reduced.

[0133] In this embodiment, the peel-off prevention mechanism 75 is configured to restrict the movement of the upper member 36 in a direction away from the lower member 35 by the hooking portion 76 and the hooked portion 77, but any configuration may be used as long as it restricts the movement of the upper member 36 in a direction away from the lower member 35.

[0134] <Rattling suppression mechanism> A rattle suppression mechanism 90 is provided between the lower member 35 and the upper member 36 to suppress rattle when the upper member 36 rotates.

[0135] As shown in FIG. 7, the rattle suppression mechanism 90 includes a protrusion 91 provided on at least one of the upper member 36 and the lower member 35, and a sliding contact portion 92 provided on the other of the upper member 36 and the lower member 35, which is in sliding contact with the protrusion 91.

[0136] An elastically deformable elastic member 93 is provided between the portion of the sliding contact portion 92 with which the protruding portion 91 slides and the protruding portion 91. Relative displacement in the up-down direction between the upper member 36 and the lower member 35 that may occur during rotation is suppressed by the elastic deformation of the elastic member 93, thereby preventing rattling during rotation. The elastic member 93 may be made of a resin member, or may be made of a member such as a spring.

[0137] 3, it is preferable that at least one of the protruding portion 91 and the sliding contact portion 92 is configured to form an arc shape centered on the axis X (the rotation axis of the seat main body 5, the central axis of the shaft member 37). When the seat main body 5 is rotating, the protruding portion 91 can be kept in sliding contact with the sliding contact portion 92. This makes it possible to prevent rattling when the seat main body 5 is rotating.

[0138] In this embodiment, the protruding portion 91 is provided on the lower bracket 38, and the sliding contact portion 92 is provided on the upper frame 39. As shown in Fig. 5, the lower bracket 38 is provided with a bush bracket 94 for constituting the protruding portion 91. In this embodiment, two bush brackets 94 are attached to the lower bracket 38 side by side, one behind the other. Hereinafter, the bush bracket 94 located on the front side will be referred to as a front bush bracket 94F, and the bush bracket 94 located on the rear side will be referred to as a rear bush bracket 94R, as necessary.

[0139] Each bush bracket 94 is fixed to the lower bracket 38 and extends upward to form a protruding portion 91 that extends toward the inside of the seat. In this embodiment, the protruding portion 91 is made of a sheet metal member that is bent into an inverted L shape. The elastic member 93 is made of a resin member and is joined to the outer surface of the protruding portion 91 including the upper surface. Hereinafter, the protruding portion 91 of the front bush bracket 94F will be referred to as a front protruding portion 91F, and the protruding portion 91 of the rear bush bracket 94R will be referred to as a rear protruding portion 91R.

[0140] The upper frame 39 is provided with slide brackets 95 for forming the sliding contact portion 92. In this embodiment, two slide brackets 95 are attached in a line up in the front and rear on the lower surface of the upper frame 39. Hereinafter, the slide bracket 95 located on the front side will be referred to as a front slide bracket 95F, and the slide bracket 95 located on the rear side will be referred to as a rear slide bracket 95R.

[0141] The front slide bracket 95F includes a generally flat upper wall portion 100 facing the up-down direction, a standing wall portion 101 extending downward from the seat outer edge of the upper wall portion 100, and a lateral wall portion 102 extending from the lower end of the standing wall portion 101 to the outside of the seat. The front slide bracket 95F is coupled (for example, fastened) to the upper frame 39 at the upper wall portion 100. The standing wall portion 101 has an arc shape in a top view centered on the axis X of the shaft member 37, and extends generally in the front-rear direction.

[0142] The lateral wall portion 102 and the upper frame 39 are spaced apart from each other in the vertical direction, and the front protruding portion 91F is received between the lateral wall portion 102 and the upper frame 39. The front protruding portion 91F is in sliding contact with the lateral wall portion 102 from above, and the lateral wall portion 102 constitutes a sliding contact portion 92 (hereinafter, a front sliding contact portion 92F) of the front protruding portion 91F.

[0143] The rear slide bracket 95R has a generally U-shape in side view. The rear slide bracket 95R includes a generally flat upper wall portion 104 facing the up-down direction, a standing wall portion 105 extending downward from the inner edge of the seat of the upper wall portion 104, and a lateral wall portion 106 extending from the lower end of the standing wall portion 105 to the outside of the seat.

[0144] The upper wall portion 100 and the lateral wall portion 106 face each other vertically with a gap therebetween, and the rear protrusion portion 91R is received between the upper wall portion 100 and the lateral wall portion 106. The rear protrusion portion 91R is in sliding contact with the lateral wall portion 106 from above, and the lateral wall portion 106 constitutes a sliding contact portion 92 (hereinafter, rear sliding contact portion 92R) of the rear protrusion portion 91R.

[0145] Next, the operation of the vehicle seat 1 will be described.

[0146] <Initial position> 3, when the seat body 5 is in the initial position, the front end of the one-side frame 41 and the front end of the other-side frame 42 are aligned in the front-rear direction, and the seat body 5 is disposed so as to face the front of the vehicle. The drive unit 20 is located above the floor 3, and overlaps with the upper member 36 in a front view.

[0147] When the seat body 5 is in the initial position, the hooking portions 76A-76D of the peeling prevention mechanism 75 are hooked to the corresponding hooked portions 77A-77D, respectively, to prevent the upper member 36 from peeling off from the lower member 35 (for example, see Figs. 8 and 9). Since the hooking portions 76A-76D and the hooked portions 77A-77D are each configured to have an arc shape, it is possible to prevent the upper member 36 from peeling off from the lower member 35 even when the seat body 5 is in a position shifted from the initial position or slightly rotated from the initial position.

[0148] 7, when the seat body 5 is in the initial position, the front protruding portion 91F is in sliding contact with the front sliding contact portion 92F. Similarly, the rear protruding portion 91R is in sliding contact with the rear sliding contact portion 92R. This makes it possible to prevent the seat body 5 from rattling when the seat body 5 is in the initial position.

[0149] Since the front sliding contact portion 92F extends forward in an arc shape, the protrusion 91 of the front slide bracket 95F is maintained in sliding contact with the front sliding contact portion 92F until the seat body 5 is displaced from the initial position to the rotation position. Therefore, rattling of the seat body 5 can be prevented until the seat body 5 moves from the initial position to the rotation position.

[0150] <Rotation position> When the engagement between the latch device 69 and the striker 70 is released, the seat body 5 becomes rotatable about the axis X, and can be displaced to a rotation position in which the front part of the seat body 5 faces the outside of the vehicle. As shown in Fig. 11, when the seat body 5 is in the rotated position, the front end of the other-side frame 42 is located in front of the front end of the one-side frame 41.

[0151] 12, when the seat body 5 is in the rotated position, the front end of the other-side frame 42 is located behind the electric motor 20A (drive device 20) in a side view. This makes it possible to avoid interference between the other-side frame 42 and the drive device 20 when the seat body 5 is in the rotated position.

[0152] 13, when the seat body 5 is in the rotated position, the other-side frame 42 overlaps with the electric motor 20A in a front view. This makes it possible to reduce the left-right width of the vehicle seat 1 compared to a case in which the drive device 20 is provided at a position that does not overlap with the other-side frame 42 in a front view.

[0153] When the seat body 5 is in the rotated position, the front end of the other-side frame 42 may overlap the recess 31 of the cover member 22 that covers the electric motor 20A (drive device 20) in a top view. As shown in Fig. 12, the recess 31 is recessed so as to be separated from the front end of the other-side frame 42 when the seat body 5 is in the rotated position. Therefore, when the seat body 5 is in the rotated position, interference between the holding frame 19 and the other-side frame 42 can be avoided.

[0154] In addition, the lower edge of the relief portion 31 is defined by a horizontal plane 32 that is approximately horizontal, and is parallel to the other-side frame 42 when the seat body 5 is in a rotated position. This makes it possible to avoid interference between the holding frame 19 and the other-side frame 42, and also makes it possible to arrange the other-side frame 42 and the holding frame 19 so as to overlap each other in the vertical direction. This allows the vehicle seat 1 to be configured small and compact in the front-rear direction.

[0155] 11, when the seat body 5 is in the rotated position, the front end of the fixed bracket 52 provided on the other-side frame 42 overlaps with the drive unit 20 in top view. This allows the vehicle seat 1 to be configured small and compact in the front-rear direction.

[0156] 11 and 12, when the seat body 5 is in the rotated position, the front protruding portion 91F is in sliding contact with the front sliding contact portion 92F. Therefore, rattling of the seat body 5 is prevented when the seat body 5 is in the rotated position.

[0157] Next, the effects of the vehicle seat 1 will be described.

[0158] The vehicle seat 1 is equipped with a peel-off prevention mechanism 75 that prevents the seat body 5 from peeling off from the slide device 7. The peel-off prevention mechanism 75 is equipped with an interior peel-off prevention portion 75L and an exterior peel-off prevention portion 75R. The exterior peel-off prevention portion 75R is equipped with a front peel-off prevention portion 80 arranged in front of the shaft member 37, and a rear peel-off prevention portion 81 arranged behind the shaft member 37. The front peel-off prevention portion 80 and the rear peel-off prevention portion 81 are arranged on the front side of the shaft member 37 and rear side of the shaft member 37, respectively, and prevent the seat body 5 from peeling off from the exterior upper rail 18 on which the shaft member 37 is provided.

[0159] During a frontal collision, a load is applied to the rear portion of the seat body 5 in a direction that causes it to peel off from the upper rail 18. At this time, the rear peeling prevention portion 81 prevents the seat body 5 from peeling off from the upper rail 18. During a rearward collision, a load is applied to the front portion of the seat body 5 in a direction that causes it to peel off from the upper rail 18. At this time, the front peeling prevention portion 80 prevents the seat body 5 from peeling off from the upper rail 18.

[0160] Therefore, in both a frontal collision and a rear collision, the lifting of the seat cushion 11 is restricted by the peeling prevention mechanism 75. Therefore, the lifting of the seat cushion 11 can be more reliably prevented in both a frontal collision and a rear collision.

[0161] The upper member 36 extends in the fore-and-aft direction along the upper rail 18 on the inside of the vehicle and comprises a one-side frame 41 connected to the upper rail 18 via an axis member 37, an other-side frame 42 extending in the fore-and-aft direction above the upper rail 18 on the outside of the vehicle, and a connecting frame 40 connecting the one-side frame 41 and the other-side frame 42.

[0162] Therefore, the rotatable vehicle seat 1 can be made lighter than when the upper member 36 is constructed from a single plate connecting the areas defined by the front and rear edges of the one side frame 41 and the front and rear edges of the other side frame 42.

[0163] Furthermore, the connecting frame 40 is located on the seat inner side relative to the left and right outer edges of the pair of left and right lower rails 17. Therefore, the upper member 36 can be made compact.

[0164] The lower member 35 is composed of a pair of left and right lower brackets 38 extending along the respective upper rails 18. Therefore, the vehicle seat 1 can be made lighter in weight than when the lower member 35 is composed of a single plate member spanning the left and right upper rails 18.

[0165] Wheels 65 (rolling members) are provided between the upper member 36 and the lower member 35, which roll to rotate the upper member 36 relative to the lower member 35. This makes it possible to prevent abnormal noise from being generated when the seat body 5 rotates, compared to the case where the upper member 36 rotates by sliding relative to the lower member 35. Furthermore, by providing the wheels 65 (rolling members) between the upper frame 39 and the lower bracket 38, where the shaft member 37 is not provided, the upper frame 39 can be stably supported by the lower bracket 38.

[0166] 13, the electric motor 20A (drive unit 20) is located above the floor 3 and configured to overlap the upper member 36 of the rotation unit 6 in a front view. Therefore, even if the floor 3 is not provided with a structure for accommodating the drive unit 20 (for example, a recess in the floor 3), the vehicle seat can be installed on the floor 3. Furthermore, since the drive unit 20 is arranged to overlap the upper member 36 of the rotation unit 6 and is arranged in a position close to the seat main body 5, the effect of dust, dirt, etc. on the drive unit 20 can be reduced.

[0167] Although the specific embodiment has been described above, the present invention is not limited to the above embodiment and can be modified in a wide range of ways.

[0168] In the above embodiment, the holding frame 19 is configured to connect the lower rail 17, but the holding frame 19 may be configured to connect the upper rail 18. In this case, the driving device 20 is held by the holding frame 19, and the driving device 20 is supported by the upper rail 18 via the holding frame 19. [Explanation of symbols]

[0169] 1: Vehicle seats 3: Floor 5: Seat body 6: Rotating device 7: Slide device 11: Seat cushion 12: Seat back 17: Lower rail 18: Upper rail 35: Lower part 36: Upper member 37: Shaft member 38: Lower bracket 40: Connected frame 41: One side frame 42: Other side frame 46: One-side connector (an example of a connector) 50: Other side connection piece (example of connection piece) 52: Fixed bracket 68: Locking device 69: Latch device 70: Striker 74: Notch 75: Peel prevention mechanism 75L: Anti-peeling part on the inside of the car (an example of an anti-peeling part on the other side) 75R: Outside peeling prevention part (an example of one-side peeling prevention part) 76:Latching part 77:Latched part 90: Rattle suppression mechanism 91:Protrusion 92: Sliding contact part 93: Elastic material

Claims

1. A vehicle seat, comprising: A seat body including a seat cushion and a seat back; A slide device provided between a floor and the seat cushion; a rotation device provided between the sliding device and the seat cushion, The slide device includes a pair of left and right lower rails connected to the floor, and upper rails each connected to the lower rails so as to be slidable thereto. the rotation device rotatably connects the slide device and the seat body and includes an axis member constituting a rotation axis, and a peeling prevention mechanism that restricts the seat body from moving upward relative to the slide device, The shaft member connects one of the left and right upper rails to the seat body, The peeling prevention mechanism includes a pair of one-side peeling prevention parts arranged at the front and rear of the shaft member, The one-side peeling prevention portion prevents peeling between one of the left and right upper rails and the seat body.

2. The vehicle seat according to claim 1 , wherein the shaft member connects the upper rail located on an outer side of the vehicle and the seat body.

3. the peeling prevention mechanism includes an other-side peeling prevention portion that prevents the other of the left and right upper rails from peeling off from the seat body at the other of the upper rails, The vehicle seat according to claim 1 , wherein each of the one-side peel-off prevention portion and the other-side peel-off prevention portion includes a hooking portion and a hooked portion hooked to the hooking portion.

4. the peeling prevention mechanism includes an other-side peeling prevention portion that prevents the other of the left and right upper rails from peeling off from the seat body at the other of the upper rails, The vehicle seat according to claim 1 , wherein the other-side peel-off prevention portion extends in the front-rear direction on the left and right sides of the shaft member on the other of the upper rails.

5. The vehicle seat according to claim 1 , wherein each of the one-side peeling prevention portions is disposed on one of the upper rails so as to extend in the left-right direction.

6. the rotation device includes a lower member fixed to an upper surface of the upper rail, and an upper member rotatably connected to the lower member via the shaft member, the upper member includes a one-side frame extending in a front-rear direction along one of the upper rails and connected to the one of the upper rails via the shaft member, an other-side frame extending in the front-rear direction along the other of the upper rails above the other of the upper rails, and a connecting frame connecting the one-side frame and the other-side frame, The one-side frame and the other-side frame are provided with connection pieces extending inwardly to the left and right, a locking device for preventing rotation of the upper member is provided between the connecting piece of the other frame and the lower member, The vehicle seat according to claim 1 , wherein a front-to-rear width of the connection piece of the other frame is larger than a front-to-rear width of the connection piece of the one frame.

7. the locking device includes a striker provided on the lower member and a latch device provided on the connection piece of the other-side frame and adapted to engage with and disengage from the striker, 7. The vehicle seat according to claim 6, wherein the connecting piece of the other frame is provided with a notch for receiving the striker.

8. 7. The vehicle seat according to claim 6, wherein a fixing bracket is coupled to the one side frame and the other side frame, the fixing bracket being connected to the seat cushion and extending in a front-rear direction.

9. A rattle suppression mechanism is provided between the other frame and the lower member, The rattle suppression mechanism includes a protrusion, an elastic member provided on the protrusion and capable of elastic deformation, and a sliding contact portion with which the protrusion slides, The vehicle seat according to any one of claims 6 to 8, wherein at least one of the protruding portion and the sliding contact portion forms an arc shape centered on the shaft member.

10. 7. The vehicle seat according to claim 6, wherein the lower member includes a pair of left and right lower brackets extending along the upper rails, respectively.

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