Vehicle seat

Abstract

To provide a vehicle seat capable of highly stably supporting an occupant during sudden deceleration of a vehicle.SOLUTION: A vehicle seat 1 comprises: a seat cushion frame 3 having a front provided so as to be rotatable with respect to a base 9LF, 9RF provided on a floor F of a vehicle and a rear provided with a coupler 34, 35 detachably coupled with a striker 11L, 11R provided on a base 9LB, 9RB; a seat back frame 5 provided in the rear of the seat cushion frame 3; and a retractor 57 that is provided in the seat back frame 5 and that takes up a seat belt 30. The left end of the retractor 57 is positioned closer to the left than the right end of the coupler 35, and the right end of the tractor 57 is positioned closer to the right than the left end of the coupler 35.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] Patent Document 1 describes a tumble seat, which is a type of vehicle seat. This tumble seat has a connecting device provided at the rear of the seat cushion frame that is detachably connected to a striker provided on the floor of the vehicle. When this tumble seat is in use, the connecting device connects to the striker, preventing the tumble seat from rotating around an axis at the front of the seat cushion and tilting forward. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-247298 Summary of the Invention [Problem to be solved by the invention]

[0004] A tumble seat has a retractor that retracts the seat belt and a belt guide that guides the seat belt unwound from the retractor, mounted on the upper part of the seatback frame. When the vehicle suddenly decelerates, such as when it collides with an obstacle ahead or suddenly stops, the belt guide and retractor are pulled forward by the seat belt that is holding the seat occupant. The load applied to the retractor is transmitted to the floor via the seatback, seat cushion, and connecting device. If the retractor and connecting device are misaligned in the left-right direction, the seatback or seat cushion is likely to deform. As a result, the seat cannot stably support the occupant.

[0005] In view of the above background, an object of the present invention is to provide a vehicle seat that can stably support an occupant when the vehicle suddenly decelerates. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, one aspect of the present invention is a vehicle seat (1), comprising a seat cushion frame (3) having a front portion rotatably mounted relative to a base (9LF, 9RF, 9LB, 9RB) mounted on a floor (F) of the vehicle and a rear portion provided with connecting devices (34, 35) that are detachably coupled to strikers (11L, 11R) mounted on the base; a seat back frame (5) mounted on the rear portion of the seat cushion frame; and a retractor (57) mounted on the seat back frame and that retracts a seat belt (30), wherein the left end of the retractor is located to the left of the right end of the connecting device, and the right end of the retractor is located to the right of the left end of the connecting device.

[0007] According to this aspect, the distance between the retractor and the connecting device in the left-right direction is short, so the force in the left-right direction transmitted from the retractor to the connecting device is small, and as a result, the vehicle seat can support the occupant with good stability.

[0008] In the above aspect, it is preferable that the seat back frame has a belt guide (58) that is fixed to the upper part of the seat back frame and guides the seat belt unwound from the retractor, and that the left end of the belt guide is located to the left of the right end of the connecting device, and the right end of the belt guide is located to the right of the left end of the connecting device.

[0009] According to this aspect, the distance between the belt guide and the connecting device in the left-right direction is short, so the force in the left-right direction transmitted from the belt guide to the connecting device is small, and as a result, the vehicle seat can support the occupant stably.

[0010] In the above aspect, the seat cushion frame includes left and right cushion side members (21L, 21R) extending in the front-rear direction, a front member (22B) extending in the left-right direction and joined to front ends of the left and right cushion side members, a rear member (23) extending in the left-right direction and joined to rear ends of the left and right cushion side members, a cushion intermediate member (24) extending in the front-rear direction between the left and right cushion side members and joined to the front member and the rear member, and a support member (40) extending downward from the rear end of the cushion intermediate member, and the seatback frame includes left and right back side members (51L, 51R) extending in the up-down direction. , 51R), an upper member (52) extending in the left-right direction and joined to upper ends of the left and right back side members, and a back intermediate member (53) extending in the up-down direction between the left and right back side members and joined to the upper member, wherein lower ends of the left and right back side members are rotatably joined to rear ends of the corresponding left and right cushion side members on the left and right, and lower ends of the back intermediate members are rotatably joined to rear ends of the cushion side members, the retractor is provided on the back intermediate member, and the joining device is joined to the support member and is arranged below the back intermediate member when viewed from the front.

[0011] According to this aspect, when the vehicle suddenly decelerates, the force transmitted from the seat belt to the retractor is transmitted to the connecting device in a vertically linear manner via the back intermediate member. That is, the load path from the retractor to the connecting device is linear. This makes it difficult for the seat back and seat cushion to deform. Therefore, the vehicle seat can support the occupant stably.

[0012] In the above aspect, an imaginary line (LC) extending vertically when viewed from the front may pass through the back intermediate member, the cushion intermediate member, the support member, and the connecting device.

[0013] According to this aspect, the load path from the retractor to the connecting device is linear, which makes it difficult for the seat back and seat cushion to deform, thereby enabling the vehicle seat to stably support the occupant.

[0014] In the above aspect, the support member has a bent portion (40C) between an upper end portion (40A) and a lower end portion (40B), the lower end portion of the support member is offset in the left-right direction relative to the upper end portion of the support member via the bent portion, and the connecting device is connected to the lower end portion of the support member and is positioned below the upper end portion of the support member.

[0015] According to this embodiment, the coupling device 35 can be disposed below the back intermediate member.

[0016] In the above aspect, the lower end of the support member may be offset toward the retractor in the left-right direction relative to the upper end of the support member.

[0017] According to this aspect, the connecting device can be disposed on the retractor side below the bag intermediate member.

[0018] In the above aspect, the coupling device may be coupled to the lower end of the support member below the bent portion of the support member.

[0019] According to this aspect, the coupling device can be disposed below the back intermediate member.

[0020] In the above aspect, the support member may be formed in a cylindrical shape that extends vertically.

[0021] According to this aspect, the rigidity of the lower end portion of the support member to which the connecting device is connected can be increased.

[0022] In the above aspect, the support member has a support wall portion (42) extending downward from the rear end portion of the cushion intermediate member, and a support plate (41) connected to the support wall portion and forming a closed cross-sectional structure together with the support wall portion, and the connecting device may be connected to the support plate.

[0023] According to this aspect, the support plate forms a closed cross-sectional structure together with the support wall portion, and therefore the rigidity of the support plate to which the connecting device is connected can be increased.

[0024] In the above aspect, it is preferable that the seatback frame has a dynamic damper (59) supported thereon, and that the upper end of the dynamic damper is positioned higher than the lower end of the retractor, and the lower end of the dynamic damper is positioned lower than the upper end of the retractor.

[0025] According to this aspect, the dynamic damper can effectively damp vibrations transmitted from the seat belt to the retractor.

[0026] In the above aspect, the seat cushion frame may include a rail device (2) having lower rails (7L, 7R) provided on the floor and extending forward and backward, and upper rails (8L, 8R) movably supported on the lower rails and connected to the base, and a rotating member (10L, 10R) rotatably supported on the base and connected to the front part of the seat cushion frame, and the striker may be provided on the base.

[0027] According to this aspect, the seat cushion can be moved forward and backward relative to the floor, allowing the seat occupant to move the vehicle seat to a more suitable position. [Effects of the Invention]

[0028] In order to solve the above-mentioned problems, one aspect of the present invention is a vehicle seat (1), comprising a seat cushion frame (3) having a front portion rotatably mounted relative to a base (9LF, 9RF, 9LB, 9RB) mounted on a floor (F) of the vehicle and a rear portion provided with connecting devices (34, 35) that are detachably coupled to strikers (11L, 11R) mounted on the base; a seat back frame (5) mounted on the rear portion of the seat cushion frame; and a retractor (57) mounted on the seat back frame and that retracts a seat belt (30), wherein the left end of the retractor is located to the left of the right end of the connecting device, and the right end of the retractor is located to the right of the left end of the connecting device.

[0029] According to this aspect, the distance between the retractor and the connecting device in the left-right direction is short, so the force in the left-right direction transmitted from the retractor to the connecting device is small, and as a result, the vehicle seat can support the occupant with good stability.

[0030] In the above aspect, it is preferable that the seat back frame has a belt guide (58) that is fixed to the upper part of the seat back frame and guides the seat belt unwound from the retractor, and that the left end of the belt guide is located to the left of the right end of the connecting device, and the right end of the belt guide is located to the right of the left end of the connecting device.

[0031] According to this aspect, the distance between the belt guide and the connecting device in the left-right direction is short, so the force in the left-right direction transmitted from the belt guide to the connecting device is small, and as a result, the vehicle seat can support the occupant stably.

[0032] In the above aspect, the seat cushion frame includes left and right cushion side members (21L, 21R) extending in the front-rear direction, a front member (22B) extending in the left-right direction and joined to front ends of the left and right cushion side members, a rear member (23) extending in the left-right direction and joined to rear ends of the left and right cushion side members, a cushion intermediate member (24) extending in the front-rear direction between the left and right cushion side members and joined to the front member and the rear member, and a support member (40) extending downward from the rear end of the cushion intermediate member, and the seatback frame includes left and right back side members (51L, 51R) extending in the up-down direction. , 51R), an upper member (52) extending in the left-right direction and joined to upper ends of the left and right back side members, and a back intermediate member (53) extending in the up-down direction between the left and right back side members and joined to the upper member, wherein lower ends of the left and right back side members are rotatably joined to rear ends of the corresponding left and right cushion side members on the left and right, and lower ends of the back intermediate members are rotatably joined to rear ends of the cushion side members, the retractor is provided on the back intermediate member, and the joining device is joined to the support member and is arranged below the back intermediate member when viewed from the front.

[0033] According to this aspect, when the vehicle suddenly decelerates, the force transmitted from the seat belt to the retractor is transmitted to the connecting device in a vertically linear manner via the back intermediate member. That is, the load path from the retractor to the connecting device is linear. This makes it difficult for the seat back and seat cushion to deform. Therefore, the vehicle seat can support the occupant stably.

[0034] In the above aspect, an imaginary line (LC) extending vertically when viewed from the front may pass through the back intermediate member, the cushion intermediate member, the support member, and the connecting device.

[0035] According to this aspect, the load path from the retractor to the connecting device is linear, which makes it difficult for the seat back and seat cushion to deform, thereby enabling the vehicle seat to stably support the occupant.

[0036] In the above aspect, the support member has a bent portion (40C) between an upper end portion (40A) and a lower end portion (40B), the lower end portion of the support member is offset in the left-right direction relative to the upper end portion of the support member via the bent portion, and the connecting device is connected to the lower end portion of the support member and is positioned below the upper end portion of the support member.

[0037] According to this embodiment, the coupling device 35 can be disposed below the back intermediate member.

[0038] In the above aspect, the lower end of the support member may be offset toward the retractor in the left-right direction relative to the upper end of the support member.

[0039] According to this aspect, the connecting device can be disposed on the retractor side below the bag intermediate member.

[0040] In the above aspect, the coupling device may be coupled to the lower end of the support member below the bent portion of the support member.

[0041] According to this aspect, the coupling device can be disposed below the back intermediate member.

[0042] In the above aspect, the support member may be formed in a cylindrical shape that extends vertically.

[0043] According to this aspect, the rigidity of the lower end portion of the support member to which the connecting device is connected can be increased.

[0044] In the above aspect, the support member has a support wall portion (42) extending downward from the rear end portion of the cushion intermediate member, and a support plate (41) connected to the support wall portion and forming a closed cross-sectional structure together with the support wall portion, and the connecting device may be connected to the support plate.

[0045] According to this aspect, the support plate forms a closed cross-sectional structure together with the support wall portion, and therefore the rigidity of the support plate to which the connecting device is connected can be increased.

[0046] In the above aspect, it is preferable that the seatback frame has a dynamic damper (59) supported thereon, and that the upper end of the dynamic damper is positioned higher than the lower end of the retractor, and the lower end of the dynamic damper is positioned lower than the upper end of the retractor.

[0047] According to this aspect, the dynamic damper can effectively damp vibrations transmitted from the seat belt to the retractor.

[0048] In the above aspect, the seat cushion frame may include a rail device (2) having lower rails (7L, 7R) provided on the floor and extending forward and backward, and upper rails (8L, 8R) movably supported on the lower rails and connected to the base, and a rotating member (10L, 10R) rotatably supported on the base and connected to the front part of the seat cushion frame, and the striker may be provided on the base.

[0049] According to this aspect, the seat cushion can be moved forward and backward relative to the floor, allowing the seat occupant to move the vehicle seat to a more suitable position. [Brief explanation of the drawings]

[0050] [Figure 1] FIG. 1 is a perspective view of a frame of a vehicle seat according to an embodiment, seen from the left front; [Figure 2] Cross section of seat back frame [Figure 3] Rear view of seat back frame [Figure 4] A perspective view of the support member as seen from the right rear. [Figure 5] Rear view of the support member [Figure 6] A longitudinal cross-sectional view of a support member and a rail device [Figure 7] Cross section of Figure 6 taken along line VII-VII DETAILED DESCRIPTION OF THE INVENTION

[0051] Hereinafter, with reference to the drawings, an embodiment in which a vehicle seat according to the present invention is applied to a vehicle seat for an automobile will be described. The vehicle seat 1 of the embodiment includes a center seat and a left seat in the second or third row of rear seats of an automobile. In the following description, the left-right direction is defined based on the seated person seated in the vehicle seat 1. The up-down direction is the direction along the vertical direction. The front-rear direction is the direction perpendicular to the vertical direction and the left-right direction.

[0052] As shown in FIG. 1, a vehicle seat 1 includes a rail device 2 provided on the floor F of an automobile, a seat cushion 4 including a seat cushion frame 3 supported by the rail device 2, and a seat back 6 including a seat back frame 5 provided at the rear of the seat cushion frame 3. The seat cushion 4 supports the buttocks of a seated occupant from below. The seat cushion 4 includes a pad (not shown) supported by the seat cushion frame 3 and a cover material (not shown) that covers the pad. The seat back 6 supports the back of the seated occupant from behind. The seat back 6 includes a pad (not shown) supported by the seat back frame 5 and a cover material (not shown) that covers the pad. A headrest (not shown) is provided on the upper part of the seat back 6 to support the head of the seated occupant from behind.

[0053] As shown in FIGS. 1 to 3, the rail device 2 includes left and right lower rails 7L, 7R extending in the front-rear direction, left and right upper rails 8L, 8R supported by the lower rails 7L, 7R, and left and right base brackets (bases) 9LF, 9RF, 9LB, 9RB provided on the upper portions of the upper rails 8L, 8R. As shown in FIG. 1, the front base brackets 9LF, 9RF are provided with torsion coil springs. The front base brackets 9LF, 9RF support rotating members 10L, 10R. The rotating members 10L, 10R are rotatably supported by the front base brackets 9LF, 9RF and are coupled to the front portion of the seat cushion frame 3. As shown in FIGS. 2 and 3, the rear base brackets 9LB, 9RB are provided with strikers 11L, 11R. The rail device 2 may be omitted from the vehicle seat 1, and the base brackets 9LF, 9RF, 9LB, 9RB may be provided on the floor F.

[0054] As shown in Fig. 6, the right base bracket 9RB has hook portions 9RBF at each of its left and right ends. A protective member 12 is provided between the rear portion of the lower rail 7R and the floor F. The protective member 12 has a lower plate portion 12A extending in the front-to-rear direction along the lower surface of the lower rail 7R, left and right vertical plate portions 12B extending upward from left and right side edges of the lower plate portion 12A, and left and right hook portions 12C extending in directions away from each other from the upper edges of the left and right vertical plate portions 12B. The tips of the left and right hook portions 12C of the protective member 12 are positioned inside the corresponding left and right hook portions 9RBF of the base bracket 9RB.

[0055] Sudden deceleration of the vehicle, for example, may cause an upward force to be applied from the striker 11R to the base bracket 9RB. In this case, the left and right hook portions 9RBF of the base bracket 9RB and the corresponding left and right hook portions 12C of the protective member 12 engage with each other to resist the upward force. This prevents the striker 11R from separating from the floor F. Under normal circumstances, the left and right hook portions 9RBF of the base bracket 9RB and the corresponding left and right hook portions 12C of the protective member 12 face each other with a gap between them. Therefore, when the upper rail 8R slides together with the striker 11R and the base bracket 9RB, no resistance force is generated due to friction between the left and right hook portions 9RBF of the base bracket 9RB and the corresponding left and right hook portions 12C of the protective member 12.

[0056] As shown in FIG. 1 , the seat cushion frame 3 includes left and right cushion side members 21L, 21R, front members 22A, 22B, a rear member 23, a cushion intermediate member 24, and a cross member 25. The left and right cushion side members 21L, 21R extend in the front-rear direction. The front members 22A, 22B extend in the left-right direction and are connected to the front ends of the left and right cushion side members 21L, 21R. The rear member 23 extends in the left-right direction and is connected to the rear ends of the left and right cushion side members 21L, 21R. The cushion intermediate member 24 extends in the front-rear direction between the left and right cushion side members 21L, 21R and is connected to the front member 22B and the rear member 23. The cross member 25 extends in the left-right direction and is connected to the rear portions of the cushion side members 21R and the cushion intermediate member 24.

[0057] The left cushion side member 21L is formed of two sheet metal members connected to each other. The front member 22A, a portion of the right cushion side member 21R, and the cross member 25 are formed of a single bent pipe. The right cushion side member 21R is formed of a pipe and two sheet metal members. The front member 22B and the rear member 23 are formed of a pipe. The cushion intermediate member 24 includes a right member 24R, a left member 24L, and a connecting member 24U. The right member 24R and left member 24L of the cushion intermediate member 24 are joined to each other and formed into a pipe shape extending in the front-to-rear direction.

[0058] Plate-shaped pan frames 26, 27 are suspended between the front member 22B and the rear member 23. The pan frame 26 is connected at its front end to the front member 22B and at its rear end to the rear member 23, between the cushion side member 21R and the cushion intermediate member 24. The pan frame 27 is connected at its front end to the front member 22B and at its rear end to the rear member 23, between the cushion intermediate member 24 and the cushion side member 21L. A buckle 28 is provided on the right cushion side member 21R. The buckle 28 is detachably connected to a tongue 31 of a seat belt 30. When the tongue 31 is connected to the buckle 28, the seat belt 30 can restrain the occupant in the right center seat.

[0059] The cushion side member 21L is connected to the rotating member 10L. The rotating member 10L is rotatably supported by the base bracket 9LF. The front member 22A is connected to the rotating member 10R. The rotating member 10R is rotatably supported by the base bracket 9RF. In this way, with the left cushion side member 21L connected to the rotating member 10L and the front member 22A connected to the rotating member 10R, the front portion of the seat cushion frame 3 can rotate relative to the base brackets (bases) 9LF, 9RF provided on the floor F, around the support shaft R1 extending laterally.

[0060] 1, the rear end portions of the left and right cushion side members 21L, 21R are coupled to the rear member 23 so as to be rotatable about a rotation axis R2 extending in the left-right direction. The connecting member 24U of the cushion intermediate member 24 is coupled to the rear member 23 so as to be rotatable about the rotation axis R2 extending in the left-right direction. This allows the rear end portion of the seat cushion frame 3 to rotate about the rotation axis R2.

[0061] 2 and 3, a support member 33 connected to the rear member 23 and extending downward is provided on the left portion of the rear member 23, and a coupling device 34 connected to the support member 33 is provided. The coupling device 34 is detachably coupled to a striker 11L provided on the base bracket 9LB. The support member 33 is supported from below by the base bracket 9LB. As a result, the rear left portion of the seat cushion frame 3 is supported by the base bracket 9LB via the support member 33.

[0062] 1 and 4, the rear portion of the cushion intermediate member 24 has an opening 24A on the upper side and a connecting member 24U extending upward from the interior of the opening 24A. The connecting member 24U is rotatably coupled to the rear member 23. As shown in FIG. 4, the cushion intermediate member 24 has a support member 40 extending downward from the rear end portion of the cushion intermediate member 24. The support member 40 is coupled to a coupling device 35. The coupling device 35 is detachably coupled to a striker 11R provided on the base bracket 9RB.

[0063] As shown in FIGS. 1 to 3 , the seatback frame 5 includes left and right back side members 51L, 51R, an upper member 52, a back intermediate member 53, and a cross member 54. The left and right back side members 51L, 51R extend in the vertical direction and are rotatably connected to the corresponding cushion side members 21L, 21R on the left and right. The upper member 52 extends in the horizontal direction and is connected to the upper ends of the left and right back side members 51L, 51R. The back intermediate member 53 extends in the vertical direction between the left and right back side members 51L, 51R, is connected at its upper end to the upper member 52, and is rotatably connected at its lower end to the rear member 23. The cross member 54 extends in the horizontal direction and is connected to the left and right back side members 51L, 51R and the back intermediate member 53.

[0064] The upper member 52 and the upper end portion 51LA of the back side member 51L are formed by a single bent pipe. The back side member 51L has a sheet metal member 51LB joined to the upper end portion 51LA of the back side member 51L. The sheet metal member 51LB is rotatably joined to the rear end portion of the cushion side member 21L.

[0065] The upper portion 51RA and the cross member 54 of the back side member 51R are formed from a single bent pipe. The back side member 51R has an upper portion 51RA and a sheet metal member 51RB connected to the upper portion 51RA. The sheet metal member 51RB is rotatably connected to the rear end of the cushion side member 21R.

[0066] The back intermediate member 53 is connected to the upper member 52, the cross member 54, and the connecting member 24U of the cushion intermediate member 24. A lower end of the back intermediate member 53 is rotatably connected to the connecting member 24U of the cushion intermediate member 24.

[0067] 1, the sheet metal members 51RB, 51LB of the left and right back side members 51L, 51R are connected to the rear portions of the corresponding left and right cushion side members 21L, 21R on the left and right sides so as to be rotatable about a rotation axis R3 extending laterally. A lower end of the back intermediate member 53 and a connecting member 24U of the cushion intermediate member 24 are connected to be rotatable about the rotation axis R3. This allows the seat back frame 5 to rotate about the rotation axis R3.

[0068] A pair of left and right headrest support members 55 are connected to each of the left and right sections of the upper member 52. Each headrest support member 55 is formed in a cylindrical shape that extends vertically. A resin collar (not shown) is attached to each headrest support member 55. A pair of left and right pillars (not shown) extending from the headrest (not shown) are inserted into the headrest support members 55 via the collars and are supported by the headrest support members 55.

[0069] The seatback frame 5 is provided with a plurality of elastic members 56 that support the weight of a seated occupant, a retractor 57 that winds up the seat belt 30, a belt guide 58 that guides the seat belt 30 unwound from the retractor 57, and a dynamic damper 59 that suppresses vibration. The plurality of elastic members 56 are coupled to a bracket 51LD provided on the back side member 51L, the back side member 51R, the back intermediate member 53, and the cross member 54. The plurality of elastic members 56 may be metal wires.

[0070] The retractor 57 is provided on the back intermediate member 53. The retractor 57 is coupled to a bracket 53C provided on the back intermediate member 53. The retractor 57 may also be provided on the upper member 52. The retractor 57 is coupled to a bracket 52A provided on the upper member 52. The belt guide 58 is provided on the upper member 52. The belt guide 58 is located above the back intermediate member 53. The dynamic damper 59 is supported by the upper member 52 and the elastic member 56 between the back side member 51L and the back intermediate member 53.

[0071] In the vehicle seat 1 of this embodiment, a support member 40 is provided, and a cushion intermediate member 24, a back intermediate member 53, a retractor 57, and a belt guide 58 are also arranged.

[0072] As shown in FIGS. 4 to 6, the support member 40 extends downward from the rear end of the cushion intermediate member 24. The support member 40 includes a portion of the right member 24R and a portion of the left member 24L of the cushion intermediate member 24, which are joined together, and a support plate 41. As shown in FIG. 6, the support plate 41 is joined to the right member 24R of the cushion intermediate member 24. The left member 24L has a support wall portion 42 that extends downward from the rear end. The support wall portion 42 is included in the support member 40. The support wall portion 42 faces the support plate 41. The support wall portion 42 and the support plate 41 are joined to each other to form a closed cross-sectional structure.

[0073] 6, the rear end of the right member 24R of the cushion intermediate member 24 is connected to the rear end of the left member 24L with a bolt 43 and a nut 44. At the lower end 40B of the support member 40, the lower end 41B of the support plate 41 is connected to the connecting device 35 with a bolt 45 and a nut 46. The support wall portion 42 has, at its lower end, a bent end 42A that is bent toward the connecting device 35. This further increases the rigidity of the lower portion of the support member 40.

[0074] As shown in Figures 4 to 7, the support member 40 is formed in a cylindrical shape that extends vertically. As shown in Figures 4 to 6, the support member 40 has a bent portion 40C between an upper end portion 40A and a lower end portion 40B. The upper end portion 40A of the support member 40 includes an upper end portion 41A of the support plate 41. The lower end portion 40B of the support member 40 includes a lower end portion 41B of the support plate 41. The bent portion 40C of the support member 40 includes the lower end portion of the right member 24R of the cushion intermediate member 24 and the bent portion 41C of the support plate 41.

[0075] As shown in FIGS. 2 and 4, the lower end 40B of the support member 40 is offset toward the retractor 57 in the left-right direction relative to the upper end 40A of the support member 40 via a bent portion 40C.

[0076] 6, at the bent portion 40C of the support member 40, the bent portion 41C of the support plate 41 and the lower end portion of the right member 24R of the cushion intermediate member 24 are in close contact with each other. This increases the strength of the portion of the bent portion 40C of the support member 40 that is located above the connecting device 35.

[0077] When a vehicle collides with an obstacle ahead or when the vehicle suddenly stops, the vehicle suddenly decelerates. When the vehicle suddenly decelerates, a load is applied to the belt guide 58 and the retractor 57 from the seat belt 30, which is pulled forward by supporting the seat occupant. The load applied to the belt guide 58 and the retractor 57 is transmitted to the floor F via the seat back 6, the seat cushion 4, and the connecting device 34. At this time, if the retractor 57 and the connecting device 34 are misaligned in the left-right direction, the left-right force transmitted from the retractor 57 to the connecting device 35 becomes large, and deformation of the seat back 6 or the seat cushion 4 becomes more likely.

[0078] As shown in Fig. 2, the left end of the retractor 57 is located to the left of the right end of the connecting device 35, and the right end of the retractor 57 is located to the right of the left end of the connecting device 35. Because the distance between the retractor 57 and the connecting device 35 in the left-right direction is short, the force in the left-right direction transmitted from the retractor 57 to the connecting device 35 is small. As a result, deformation of the seat back 6 and the seat cushion 4 is less likely to occur. This allows the vehicle seat 1 to support the occupant with good stability.

[0079] As shown in Figure 2, the left end of the belt guide 58 is located to the left of the right end of the connecting device 35, and the right end of the belt guide 58 is located to the right of the left end of the connecting device 35. Because the left-right distance between the belt guide 58 and the connecting device 35 is short, the left-right force transmitted from the belt guide 58 to the connecting device 35 is small. As a result, deformation of the seat back 6 and the seat cushion 4 is less likely to occur. This allows the vehicle seat 1 to support the occupant with good stability.

[0080] As shown in Fig. 2, the retractor 57 is provided on the back intermediate member 53, and the connecting device 35 is disposed below the rear end of the back intermediate member 53 when viewed from the front. As a result, during sudden deceleration of the vehicle, the force transmitted from the seat belt 30 to the retractor 57 is transmitted linearly in the vertical direction to the connecting device 35 via the back intermediate member 53. That is, the load path from the retractor 57 to the connecting device 35 is linear. This makes it difficult for the seat back 6 and the seat cushion 4 to deform. Therefore, the vehicle seat 1 can support the occupant with good stability.

[0081] As shown in Fig. 2, when viewed from the front, an imaginary line LC extending vertically passes through the back intermediate member 53, the cushion intermediate member 24, the support member 40, and the connecting device 35. Therefore, the load path from the retractor 57 to the connecting device 35 is linear. This makes it difficult for the seat back 6 and the seat cushion 4 to deform. As a result, the vehicle seat 1 can support the occupant with good stability.

[0082] 2 and 6, the lower end 40B of the support member 40 is offset in the left-right direction from the upper end 40A of the support member 40 via a bent portion 40C, and is connected to the connecting device 35. The connecting device 35 can be disposed below the back intermediate member 53.

[0083] 2 and 6, the lower end 40B of the support member 40 is offset in the left-right direction toward the retractor 57 with respect to the upper end 40A of the support member 40. This allows the coupling device 35 to be disposed below the back intermediate member 53 on the retractor 57 side.

[0084] 5 and 6, the coupling device 35 is coupled to the lower end portion 40B of the support member 40 below the bent portion 40C of the support member 40. This allows the coupling device 35 to be disposed below the back intermediate member 53.

[0085] 4 to 7, the lower end portion 40B of the support member 40 is formed into a cylindrical shape that extends vertically, thereby increasing the rigidity of the lower end portion 40B of the support member 40 to which the connecting device 35 is connected.

[0086] 4, 5 and 7, the support plate 41 forms a closed cross-sectional structure together with the support wall portion 42. This can increase the rigidity of the support plate 41 to which the connecting device 35 is connected.

[0087] 1 to 3, the upper end of the dynamic damper 59 is located higher than the lower end of the retractor 57, and the lower end of the dynamic damper 59 is located lower than the upper end of the retractor 57. This allows the dynamic damper 59 to effectively damp vibrations transmitted from the seat belt 30 to the retractor 57.

[0088] 1 to 3, the seat cushion frame 3 is supported on the rail device 2, and the rotating members 10R, 10R and the strikers 11L, 11R are provided on the upper rails 8L, 8R. This allows the seat cushion 4 to move forward and backward relative to the floor F, enabling the seat occupant to move the vehicle seat 1 to a more suitable position.

[0089] The present invention is not limited to the above-described embodiments, and the vehicle seat of the embodiment may be installed in a vehicle other than a car. [Explanation of symbols]

[0090] 1: Vehicle seats 2: Rail device 3: Seat cushion frame 4: Seat cushion 5: Seat back frame 6: Seat back 7L, 7R: Lower rail 8L, 8R: Upper rail 9LF, 9RF: Base bracket (base) 9LB, 9RB: Base bracket (base) 10L, 10R: Rotating member 11L, 11R: Striker 21L, 21R: Cushion side member 22A, 22B: Former members 23: Later member 24: Cushion intermediate member 30: Seatbelt 34, 35: Coupling device 40: Support member 40A: Upper end 40B: Bottom end 40C: Bent part 41: Support plate 42: Support wall part 51L, 51R: Back side member 52: Upper Member 53: Back middle member 57: Retractor 58: Belt guide 59: Dynamic Damper F: Floor LC: Virtual line R1: Support shaft

Claims

1. A vehicle seat, a seat cushion frame having a front portion rotatably mounted relative to a base mounted on a floor of a vehicle, and a rear portion provided with a coupling device for detachably coupling to a striker mounted on the base; a seat back frame provided at a rear portion of the seat cushion frame; a retractor that is provided on the seat back frame and that retracts the seat belt, A vehicle seat in which the left end of the retractor is located to the left of the right end of the coupling device, and the right end of the retractor is located to the right of the left end of the coupling device.

2. a belt guide that is fixed to an upper portion of the seat back frame and that guides the seat belt that is unwound from the retractor; The left end of the belt guide is located to the left of the right end of the coupling device, and 2. The vehicle seat according to claim 1, wherein a right end of the belt guide is located to the right of a left end of the connecting device.

3. The seat cushion frame is left and right cushion side members extending in the front-rear direction; a front member extending in the left-right direction and connected to front ends of the left and right cushion side members; a rear member extending in the left-right direction and connected to rear ends of the left and right cushion side members; a cushion intermediate member extending in the front-rear direction between the left and right cushion side members and connected to the front member and the rear member; a support member extending downward from a rear end of the cushion intermediate member, The seat back frame is Left and right back side members extending in the vertical direction; an upper member extending in the left-right direction and connected to upper ends of the left and right back side members; a back intermediate member extending in the up-down direction between the left and right back side members and connected to the upper member, Lower ends of the left and right back side members are rotatably coupled to rear ends of the left and right corresponding cushion side members, a lower end of the back intermediate member is pivotally connected to a rear end of the back intermediate member; The retractor is provided on the back intermediate member, 2. The vehicle seat according to claim 1, wherein the connecting device is connected to the support member and is disposed below the back intermediate member when viewed from the front.

4. 4. The vehicle seat according to claim 3, wherein an imaginary line extending vertically passes through the back intermediate member, the cushion intermediate member, the support member, and the connecting device when viewed from the front.

5. The support member has a bent portion between an upper end and a lower end, the lower end of the support member is offset in the left-right direction relative to the upper end of the support member via the bent portion, 4. The vehicle seat according to claim 3, wherein the coupling device is coupled to the lower end of the support member and is disposed below the upper end of the support member.

6. 6. The vehicle seat according to claim 5, wherein the lower end of the support member is offset toward the retractor in the left-right direction relative to the upper end of the support member.

7. 6. The vehicle seat according to claim 5, wherein the coupling device is coupled to the lower end of the support member below the bent portion of the support member.

8. The vehicle seat according to claim 3 , wherein the support member is formed in a cylindrical shape that extends vertically.

9. the support member has a support wall portion extending downward from a rear end portion of the cushion intermediate member, and a support plate coupled to the support wall portion and forming a closed cross-sectional structure together with the support wall portion, The vehicle seat according to claim 3 , wherein the coupling device is coupled to the support plate.

10. a dynamic damper supported by the seat back frame; The upper end of the dynamic damper is located above the lower end of the retractor, and 2. The vehicle seat according to claim 1, wherein a lower end of the dynamic damper is positioned lower than an upper end of the retractor.

11. a rail device including a lower rail provided on the floor and extending in the front-rear direction, and an upper rail movably supported on the lower rail and connected to the base; a rotating member rotatably supported by the base and coupled to the front portion of the seat cushion frame, The vehicle seat according to claim 3 , wherein the striker is provided on the base.

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