Vehicle seat

Abstract

To enable position adjustment of a neck-rest in a vehicle seat.SOLUTION: A vehicle seat 1 has: a seat cushion 3; a seat back lower part 5 which is rotatably provided at a rear part of the seat cushion; a seat back upper part 6 which is rotatably provided at an upper end of the seat back lower part; and a headrest 7 which is provided at an upper end of the seat back upper part so as to move vertically. The headrest has: a headrest body part 71 facing a rear head part of an occupant; and a neck-rest part 72 which protrudes forward and downward from a front lower part of the headrest body part and faces a neck of the occupant.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Some vehicle seats have a neck rest attached to a headrest to support the neck of the occupant (for example, Patent Document 1). The neck rest is disposed so as to protrude forward and downward from the headrest, and is positioned behind the neck of the occupant. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2006-334055 A Summary of the Invention [Problem to be solved by the invention]

[0004] Because the neck rest comes into contact with the occupant, it is necessary to adjust the position of the neck rest appropriately according to the occupant's body type, posture, and the inclination of the seat back. However, if the neck rest is attached to a headrest that can only move up and down relative to the seat back, the adjustment is limited to one direction, and the neck rest cannot be positioned appropriately.

[0005] In view of the above background, an object of the present invention is to enable adjustment of the position of a neck rest in a vehicle seat. [Means for solving the problem]

[0006] In order to solve the above problems, one aspect of the present invention provides a vehicle seat comprising a seat cushion (3), a lower seat back (5) rotatably mounted on a rear portion of the seat cushion, an upper seat back (6) rotatably mounted on an upper end of the lower seat back, and a headrest (7) movably mounted on an upper end of the upper seat back, the headrest having a headrest main body (71) facing the back of the head of an occupant, and a neck rest portion (72) protruding forward and downward from a front lower portion of the headrest main body and facing the neck of the occupant.

[0007] According to this aspect, the headrest having the neck rest portion is provided on the upper part of the seat back which is rotatably provided with respect to the lower part of the seat back, so that the neck rest portion can be moved forward and backward by rotating the upper part of the seat back. This expands the position adjustment range of the neck rest portion, and allows the neck rest portion to be positioned in a comfortable position for the occupant.

[0008] Furthermore, in the above invention, it is preferable that the headrest has a headrest pillar (62) extending from the headrest main body, and the upper part of the seat back has a cylindrical pillar support member (59) supporting the headrest pillar, and a headrest drive device (17) that engages with the tip of the headrest pillar protruding from the pillar support member and moves the headrest pillar in the axial direction, and further has a control device (21) that drives the headrest drive device in response to a signal from an operation input device.

[0009] According to this aspect, the headrest can be moved relative to the upper part of the seat back by operating the operation input device.

[0010] In the above invention, the lower part of the seat back has a seat back lower part drive device (15) that rotates the lower part of the seat back relative to the seat cushion, and the control device drives the seat back lower part drive device in response to a signal from the operation input device, and when the control device rotates the lower part of the seat back rearward using the seat back lower part drive device, it is preferable that the control device lowers the headrest using the headrest drive device in accordance with the amount of rotation of the lower part of the seat back.

[0011] According to this embodiment, the position of the neck rest portion can be automatically adjusted when the lower part of the seat back rotates backward. When the lower part of the seat back rotates backward, the head of the occupant leaning against the seat back moves downward relative to the upper part of the seat back. Therefore, by lowering the headrest, the neck rest portion can be moved to an appropriate position according to the neck of the occupant.

[0012] In addition, in the above invention, when the control device rotates the lower part of the seat back forward using the lower part of the seat back drive device, the control device may raise the headrest using the headrest drive device in accordance with the amount of rotation of the lower part of the seat back.

[0013] According to this embodiment, the position of the neck rest portion can be automatically adjusted when the lower part of the seat back rotates forward. When the lower part of the seat back rotates forward, the head of the occupant leaning against the seat back moves upward relative to the upper part of the seat back. Therefore, by raising the headrest, the neck rest portion can be moved to an appropriate position according to the neck of the occupant.

[0014] In the above invention, the front lower or upper seat back may have a seat back upper drive device (16) for rotating the upper seat back relative to the lower seat back, and the control device may drive the seat back upper drive device in response to a signal from the operation input device, and when the control device rotates the upper seat back forward using the seat back upper drive device, the control device may raise the headrest using the headrest drive device in accordance with the amount of rotation of the upper seat back.

[0015] According to this embodiment, the position of the neck rest portion can be automatically adjusted when the upper portion of the seat back rotates forward. When the upper portion of the seat back rotates forward, the head of the occupant leaning against the seat back moves upward relative to the upper portion of the seat back. Therefore, by raising the headrest, the neck rest portion can be moved to an appropriate position according to the neck of the occupant.

[0016] In the above invention, when the control device rotates the upper part of the seat back rearward using the upper seat back drive device, the control device may lower the headrest using the headrest drive device in accordance with the amount of rotation of the upper part of the seat back.

[0017] According to this embodiment, the position of the neck rest portion can be automatically adjusted when the upper portion of the seat back rotates backward. When the upper portion of the seat back rotates backward, the head of the occupant leaning against the seat back moves downward relative to the upper portion of the seat back. Therefore, by lowering the headrest, the neck rest portion can be moved to an appropriate position according to the neck of the occupant.

[0018] In addition, in the above invention, the lower part of the seat back has a pair of left and right first side members (46) extending vertically and pivotally connected at their lower ends to the rear part of the seat cushion, and a first cross member (47) extending horizontally and connected at both left and right ends to the upper ends of the first side members, respectively; the upper part of the seat back has a pair of left and right second side members (51) extending vertically and pivotally connected at their lower ends to the first side members, respectively, and a second cross member (53) extending horizontally and connected at both left and right ends to the upper ends of the second side members, respectively; and the seat back upper drive device is preferably provided on one of the left and right inner surfaces of the second side members.

[0019] According to this aspect, the seat back upper part drive device can be efficiently disposed inside the upper part of the seat back.

[0020] In the above invention, it is preferable that at least one of the first side members is provided with a pin (56) protruding inwardly to the left or right, and the second side member is formed with a slot (55) which receives the pin and has a predetermined length in the circumferential direction about the pivot axis of the second side member relative to the second side member.

[0021] According to this aspect, the rotation range of the upper part of the seat back relative to the lower part of the seat back can be determined by the abutment of the pin with the end of the slot.

[0022] In the above invention, the neck rest portion may have a shape in which both left and right sides bulge forward from the center.

[0023] According to this aspect, the fit between the neck rest portion and the neck of the occupant is improved, and the neck rest portion can stably support the neck of the occupant.

[0024] In the above invention, the neck rest portion may have airbags (73) on the left and right sides of the front portion for adjusting the amount of forward expansion.

[0025] According to this aspect, the fit between the neck rest portion and the neck of the occupant is improved, and the neck rest portion can stably support the neck of the occupant. Effect of the Invention

[0026] According to the above aspect, the headrest having the neck rest portion is provided on the upper part of the seat back which is rotatably provided with respect to the lower part of the seat back, so that the neck rest portion can be moved forward and backward by rotating the upper part of the seat back. This expands the position adjustment range of the neck rest portion, and allows the neck rest portion to be positioned in a comfortable position for the occupant.

[0027] According to an aspect in which the headrest driving device is provided, the headrest can be moved relative to the upper part of the seat back by operating the operation input device.

[0028] According to a configuration in which the control device causes the headrest to be lowered by the headrest drive device in accordance with the amount of rotation of the lower part of the seat back when the lower part of the seat back is rotated rearward by the lower part of the seat back drive device, the neck rest portion can be automatically lowered when the lower part of the seat back is rotated rearward.

[0029] According to an aspect in which, when the control device rotates the lower part of the seat back forward using the lower seat back drive device, the headrest is raised by the headrest drive device in accordance with the amount of rotation of the lower part of the seat back, the neck rest portion can be automatically raised when the lower part of the seat back rotates forward.

[0030] According to an aspect in which the control device causes the headrest to be raised by the headrest drive device in accordance with the amount of rotation of the upper seatback when the upper seatback is rotated forward by the upper seatback drive device, the neck rest portion can be automatically raised when the upper seatback is rotated forward.

[0031] According to a configuration in which the control device causes the headrest to be lowered by the headrest drive device in accordance with the amount of rotation of the upper seatback when the upper seatback is rotated rearward by the upper seatback drive device, the neck rest portion can be automatically lowered when the upper seatback is rotated rearward.

[0032] According to an embodiment in which the seat back upper part drive device is provided on the left or right inner surface of one of the first side members, the seat back upper part drive device can be efficiently disposed inside the upper part of the seat back.

[0033] In an embodiment in which a pin protruding inwardly to the left or right is provided on at least one of the second side members and a slot for receiving the pin is formed in the first side member, the rotation range of the upper part of the seat back relative to the lower part of the seat back can be determined.

[0034] According to an embodiment in which the neck rest portion has a shape in which the left and right sides bulge forward from the center, the fit between the neck rest portion and the occupant's neck is improved, and the neck rest portion can stably support the occupant's neck.

[0035] In an embodiment in which the neck rest portion has airbags on the left and right sides of the front portion to adjust the amount of forward expansion, the fit between the neck rest portion and the occupant's neck is improved, and the neck rest portion can stably support the occupant's neck. [Brief description of the drawings]

[0036] [Figure 1] FIG. 2 is a perspective view showing a vehicle seat in an upright position; [Diagram 2] FIG. 1 is a perspective view showing a relaxed position of a vehicle seat; [Diagram 3] FIG. 2 is a perspective view showing a frame of a vehicle seat; [Figure 4] FIG. 2 is a perspective view showing a seat back upper frame of a vehicle seat; [Diagram 5] FIG. 1 is a side view of the first back side member and the second back side member on the left side, with the seat back upper drive device omitted, as viewed from the left and right inner sides. [Figure 6] Headrest cross section DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0037] Hereinafter, an embodiment in which the present invention is applied to an automobile seat will be described with reference to the drawings. The seat may be a driver's seat, a passenger seat, or a rear seat. In the following description, left and right are defined based on an occupant seated in the seat. Identical components provided in a pair on the left and right sides are given the same numbers and will not be described.

[0038] As shown in Fig. 1 and Fig. 2, the seat 1 has a seat cushion 3 provided on a floor 2 of a vehicle, and a seat back 4 provided at the rear end of the seat cushion 3. The seat back 4 has a seat back lower part 5 rotatably provided at the rear end of the seat cushion 3, and a seat back upper part 6 rotatably provided at the seat back lower part 5. The seat 1 also has a headrest 7 provided at the upper end of the seat back upper part 6 so as to be movable up and down, and an ottoman 8 rotatably provided at the front end of the seat cushion 3. The rotation axis of the seat back lower part 5 relative to the seat cushion 3, the rotation axis of the seat back upper part 6 relative to the seat back lower part 5, and the rotation axis of the ottoman 8 relative to the seat cushion 3 each extend parallel to each other in the left-right direction.

[0039] A pair of left and right side covers 10 are provided on the left and right sides of the seat cushion 3. The rear upper ends of the left and right side covers 10 protrude upward and are located on the sides of the seat back lower part 5 to form arm rests. A back cover 11 is provided at the rear of the seat back lower part 5. An upper part of the back cover 11 extends upward behind the seat back upper part 6.

[0040] A seat surface 13 formed by the upper surface of the seat cushion 3 is inclinable with respect to the floor 2. The seat surface 13 of the seat cushion 3 can be inclined between an initial position extending substantially horizontally and an inclined position in which the front end has moved upward from the initial position.

[0041] As shown in Fig. 2, the seat 1 can assume a relaxed position in which the seat cushion 3 is tilted backward, the seat back lower portion 5 and the seat back upper portion 6 are tilted backward, and the ottoman 8 is deployed upward. The position of the seat 1 shown in Fig. 1 is called an upright position.

[0042] The seat back lower part 5 is provided with a seat back lower part drive device 15 for rotating the seat back lower part 5 relative to the seat cushion 3. The seat back upper part 6 is provided with a seat back upper part drive device 16 for rotating the seat back upper part 6 relative to the seat back lower part 5, and a head rest drive device 17 for moving the head rest 7 up and down relative to the seat back upper part 6. The seat cushion 3 is provided with a seat cushion drive device 18 for tilting the seat surface 13 relative to the floor 2, and an ottoman drive device 19 for rotating the ottoman 8 relative to the seat cushion 3. Each of the seat back lower part drive device 15, the seat back upper part drive device 16, the head rest drive device 17, the seat cushion drive device 18, and the ottoman drive device 19 has an electric motor and a drive force transmission mechanism for transmitting the drive force of the electric motor. The drive force transmission mechanism may include, for example, a reduction mechanism, a sector gear, or the like.

[0043] The seat back lower drive device 15, the seat back upper drive device 16, the headrest drive device 17, the seat cushion drive device 18, and the ottoman drive device 19 are driven by a control device 21. The control device 21 is an electronic control device (ECU) equipped with a CPU, memory, an interface, etc. An operation input device 22 for receiving operation input by an occupant is connected to the control device 21. The control device 21 is preferably disposed below the seat cushion 3 or inside the side cover 10. The operation input device 22 is preferably provided on the upper surface of the side cover 10.

[0044] The operation input device 22 has switches for respectively operating the rotation of the lower seat back 5, the rotation of the upper seat back 6, the up and down movement of the headrest 7, the tilt of the seat surface 13 of the seat cushion 3, and the rotation of the ottoman 8, as well as a relax posture switch for putting the seat 1 into a predetermined relax posture, and an upright posture switch for putting the seat 1 into a predetermined upright posture.

[0045] As shown in Fig. 3, a seat frame 30 forming the skeleton of the seat 1 has a cushion frame 31 constituting the seat cushion 3, and a seat back lower frame 32 and a seat back upper frame 33 constituting the seat back 4. The seat cushion 3 is formed by covering the cushion frame 31 with a pad and a skin material, and the seat back lower frame 5 and the seat back upper frame 6 are formed by covering the seat back lower frame 32 and the seat back upper frame 33 with a pad and a skin material. The pad is made of a cushioning material having elasticity such as polyurethane foam, and the skin material is made of synthetic leather, cloth, or the like.

[0046] The cushion frame 31 is connected to the floor 2 of the vehicle via a slide device 35. The slide device 35 has a plurality of slide rails including rails and sliders movably supported on the rails. In this embodiment, the slide device 35 has a pair of left and right lower slide rails 36 extending in the front-rear direction, an intermediate frame 37 connected to the upper portions of the lower slide rails 36, and a pair of front and rear upper slide rails 38 extending in the left-right direction and connected to the intermediate frames 37 at their lower portions.

[0047] The cushion frame 31 has a pair of left and right cushion side members 40 extending in the front-rear direction and connected to the sliders of each upper slide rail 38, a front cross member 41 suspended between front portions of each cushion side member 40, and a rear cross member 42 suspended between rear portions of each cushion side member 40, and is formed in a frame shape. The cushion frame 31 also has a plate-shaped pan frame 43 rotatably supported by the left and right cushion side members 40. The pan frame 43 has a rear end rotatably supported by intermediate portions of the left and right cushion side members 40 in the front-rear direction, and a front end located above the front cross member 41.

[0048] A seat cushion drive device 18 is provided between the pan frame 43 and one of the cushion side members 40. The seat cushion drive device 18 changes the inclination angle of the seat surface 13 of the seat cushion 3 by moving the front end of the pan frame 43 up and down relative to the cushion side frame.

[0049] The seat back lower frame 32 has a pair of left and right first back side members 46 extending generally vertically, a first upper cross member 47 suspended between the upper ends of the left and right first back side members 46, and a first lower cross member 48 suspended between the lower parts of the first back side members 46.

[0050] The lower ends of the left and right first back side members 46 extend downward further than the first lower cross member 48 and are rotatably supported by the rear ends of the corresponding cushion side members 40. A seat back lower part drive device 15 is provided to the right (inner side in the left-right direction) of the lower end of the left first back side member 46. The seat back lower part drive device 15 changes the inclination angle of the seat back lower part 5 relative to the seat cushion 3 by rotating the first back side member 46 relative to the cushion side member 40.

[0051] 3 and 4, the upper back frame has a pair of left and right second back side members 51 extending vertically, a second upper cross member 52 connecting upper ends of the left and right second back side members 51, and a second middle cross member 53 spanning between middle portions in the vertical direction of the left and right second back side members 51. Each second back side member 51 is formed from a plurality of sheet metal members, and has a surface facing left and right. The second upper cross member 52 is disposed in front of the first upper cross member 47.

[0052] The lower end of each second back side member 51 is rotatably connected to a middle portion of the corresponding first back side member 46 in the up-down direction. As shown in Figs. 4 and 5, a slot 55 is formed on the outer periphery of the lower end of each second back side member 51, extending in the circumferential direction centered on the axis of rotation of the second back side member 51 relative to the first back side member 46. The slot 55 is a groove recessed from the outer periphery of the lower end of the second back side member 51 toward the axis of rotation of the second back side member 51. A pin 56 protruding inwardly to the left and right is provided on the inner surface of each first back side member 46. Each pin 56 is received in the corresponding slot 55 and abuts against both ends of the slot 55 in the circumferential direction, thereby restricting the rotation range of the upper back frame relative to the seat back lower frame 32.

[0053] 3 and 4, the seat back upper part drive device 16 is provided on the inside (right side) of the lower end part of the left second back side member 51. By arranging the seat back upper part drive device 16 along the second back side member 51, the seat back upper part drive device 16 can be efficiently disposed inside the seat back upper part 6. The seat back upper part drive device 16 changes the tilt angle of the seat back upper part 6 relative to the seat back lower part 5 by rotating the second back side member 51 relative to the first back side member 46.

[0054] A pair of left and right support brackets 58 are provided on the second upper cross member 52. Each support bracket 58 is tubular with open ends and is connected to the front surface of the second upper cross member 52 so as to extend vertically. A pillar support member 59 for supporting the headrest 7 is inserted inside each support bracket 58. The pillar support member 59 is made of resin and has a vertically extending tubular shape.

[0055] 6, the headrest 7 has a headrest body 61 forming the center of the headrest 7, a pair of left and right headrest pillars 62 connected to the headrest body 61, a headrest pad 63 provided to cover the headrest body 61, and a cover 64 covering the headrest pad 63. The headrest body 61 has an upper body part 65 connected to each headrest pillar 62 and extending left and right above the second upper cross member 52, and a lower body part 66 extending downward from a front lower edge of the upper body part 65. The lower body part 66 is formed in a plate shape, and its lower part is located in front of the headrest pillars 62 and the upper seat back part 6.

[0056] The headrest pad 63 has an upper pad portion 67 arranged to cover the front, upper, rear, left and right sides of the upper body portion 65, and a lower pad portion 68 arranged on the front side of the lower body portion 66, which is continuous with the lower front part of the upper pad portion 67. The lower pad portion 68 protrudes forward from the upper pad portion 67. The cross section of the lower pad portion 68 viewed in the left-right direction is formed in a semicircular shape that protrudes forward. In addition, both ends of the lower pad portion 68 in the left-right direction bulge forward from the center portion. In addition, both ends of the upper pad portion 67 in the left-right direction may also protrude forward from the center portion, similar to the lower pad portion 68. In addition, the front-rear thickness of the lower pad portion 68 is preferably thicker than the front-rear thickness of the front portion of the upper pad portion 67.

[0057] The upper body portion 65 and the upper pad portion 67 form a headrest main body portion 71, and the lower body portion 66 and the lower pad portion 68 form a neck rest portion 72. The headrest main body portion 71 faces the back of the head of the occupant, and the neck rest portion 72 protrudes forward and downward from the lower front portion of the headrest main body portion 71 and faces the neck of the occupant. The vertical width of the neck rest portion 72 is preferably larger than the vertical width of the headrest main body portion 71. The neck rest portion 72 has a shape in which the left and right sides bulge forward from the center. This can increase the contact between the neck rest portion 72 and the neck of the occupant, and the neck rest portion 72 can stably support the neck of the occupant.

[0058] As shown in Figures 1 and 6, airbags 73 that are inflated and deflated by the supply and exhaust of air are disposed inside the left and right sides of the neck rest portion 72. The airbags 73 are connected to an air supply source via a hose (not shown). By adjusting the amount of air supplied to the airbag 73, the amount of forward expansion of the left and right sides of the front surface of the neck rest portion 72 can be adjusted. This can further increase the contact between the neck rest portion 72 and the neck of the occupant, and the neck rest portion 72 can stably support the neck of the occupant.

[0059] 4, a pair of left and right headrest pillars 62 extend in parallel downward from their upper ends connected to the upper body part 65 to the rear of the lower body part 66. Each headrest pillar 62 is inserted downward into the corresponding pillar support member 59, and its lower end protrudes below the pillar support member 59.

[0060] A headrest drive device 17 is provided inside the seat back upper portion 6. The headrest drive device 17 has a casing 75 in the shape of a thin, flat rectangular parallelepiped from front to rear. An upper portion of the casing 75 is connected to the second upper cross member 52 by a bracket 76. In addition, the rear surface of the lower portion of the casing 75 is connected to an intermediate portion of a wire 77 that is hung between the left and right second back side members 51. When viewed from the front, the casing 75 is disposed below the second upper cross member 52 and between the left and right second back side members 51. When viewed from the front, the casing 75 is disposed between left and right imaginary lines that are obtained by extrapolating the axes of the left and right pillar support members 59 downward. When viewed from the front, the casing 75 is disposed above the second middle cross member 53.

[0061] An electric motor and a driving force transmission mechanism for transmitting the driving force of the electric motor are provided inside the casing 75. The driving force transmission mechanism has a pair of left and right output parts 82 protruding outward to the left and right of the casing 75. The left and right output parts 82 are arranged on the axis of the corresponding pillar support member 59. An engagement hole 83 into which the tip (lower end) of the headrest pillar 62 is inserted and which engages with the tip of the headrest pillar 62 is formed at the upper part of each output part 82. When the electric motor rotates, the output part 82 moves up and down along the slit 81 and the axis of the headrest pillar 62. As a result, the headrest 7 including the neck rest part 72 moves in the axial direction of the headrest pillar 62 relative to the seat back upper part 6.

[0062] When rotating the seat back lower part 5 in response to a signal from the operation input device 22 instructing a change in the tilt angle of the seat back lower part 5, the control device 21 drives the seat back lower part drive device 15 to rotate the seat back lower part 5 relative to the seat cushion 3, and simultaneously drives the head rest drive device 17 to move the head rest 7 up and down. Specifically, in response to a signal from the operation input device 22 for rotating the seat back lower part 5 backward, the control device 21 drives the seat back lower part drive device 15 to rotate the seat back lower part 5 backward, and simultaneously drives the head rest drive device 17 to lower the head rest 7 according to the amount of rotation of the seat back lower part 5. In addition, in response to a signal from the operation input device 22 for rotating the seat back lower part 5 forward, the control device 21 drives the seat back lower part drive device 15 to rotate the seat back lower part 5 forward, and simultaneously drives the head rest drive device 17 to raise the head rest 7 according to the amount of rotation of the seat back lower part 5. The amount by which the headrest 7 is lowered and raised may be proportional to the amount by which the lower part 5 of the seat back is rotated backward and forward.

[0063] When rotating the seat back upper part 6 in response to a signal from the operation input device 22 instructing a change in the tilt angle of the seat back upper part 6, the control device 21 drives the seat back upper part drive device 16 to rotate the seat back upper part 6 relative to the seat back lower part 5, and simultaneously drives the head rest drive device 17 to move the head rest 7 up and down. Specifically, in response to a signal from the operation input device 22 for rotating the seat back upper part 6 backward, the control device 21 drives the seat back upper part drive device 16 to rotate the seat back upper part 6 backward, and simultaneously drives the head rest drive device 17 to lower the head rest 7 in accordance with the amount of rotation of the seat back upper part 6. In addition, in response to a signal from the operation input device 22 for rotating the seat back upper part 6 forward, the control device 21 drives the seat back upper part drive device 16 to rotate the seat back upper part 6 forward, and simultaneously drives the head rest drive device 17 to raise the head rest 7 in accordance with the amount of rotation of the seat back upper part 6. The amount by which the headrest 7 is lowered and raised may be proportional to the amount by which the upper portion 6 of the seat back is rotated backward and forward.

[0064] The control device 21 drives only the headrest drive device 17 in response to a signal from the operation input device 22 for instructing the lowering or raising of the headrest 7, thereby lowering or raising the headrest 7 relative to the seat back upper part 6. This allows the occupant to adjust only the position of the headrest 7 after, for example, rotating the seat back lower part 5 or the seat back upper part 6 back and forth.

[0065] In the seat 1 configured as described above, the headrest 7 having the neck rest portion 72 is provided on the seat back upper portion 6 that is rotatably provided with respect to the seat back lower portion 5, so that the neck rest portion 72 can be moved forward and backward by rotating the seat back upper portion 6. This increases the adjustment range of the neck rest portion 72, and allows the neck rest portion 72 to be positioned in a comfortable position for the occupant.

[0066] When the seat back lower part 5 is rotated back and forth by the seat back lower part drive device 15, the headrest drive device 17 lowers or raises the headrest 7 in accordance with the amount of rotation of the seat back lower part 5, so that the neck rest part 72 can be automatically positioned at an appropriate position when the seat back lower part 5 rotates. Similarly, when the seat back upper part 6 is rotated back and forth by the seat back upper part drive device 16, the headrest drive device 17 lowers or raises the headrest 7 in accordance with the amount of rotation of the seat back lower part 5, so that the neck rest part 72 can be automatically positioned at an appropriate position when the seat back upper part 6 rotates.

[0067] 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. For example, the seat back upper part drive device 16 may be provided in the seat back lower part 5 instead of the seat back upper part 6. [Explanation of symbols]

[0068] 1: Sheet 3: Seat cushion 4: Seat back 5: Lower part of seat back 6: Upper part of seat back 7: Headrest 15: Seat back lower drive unit 16: Seat back upper drive unit 17: Headrest drive device 18: Seat cushion drive device 21: Control device 22: Operation input device 32: Seat back lower frame 33: Seat back upper frame 43: Pan Frame 46: 1st backside member 47: First upper cross member 51: Second backside member 52: 2nd upper cross member 55: Slots 56: Pin 59: Pillar support member 62: Headrest pillar 71: Headrest body 72: Neckrest Club 73: Airbag

Claims

1. Seat cushion and A seat back lower portion rotatably provided at a rear portion of the seat cushion; A seat back upper portion rotatably provided at an upper end of the seat back lower portion; A headrest is provided at the upper end of the upper portion of the seat back so as to be movable up and down. the headrest includes a headrest body forming a center portion of the headrest, a pair of left and right headrest pillars connected to the headrest body, a headrest pad provided to cover the headrest body, and a skin covering the headrest pad, the headrest body has an upper body portion coupled to each of the headrest pillars and extending laterally above the upper portion of the seatback, and a lower body portion extending downward from a front lower edge of the upper body portion and disposed in front of the upper portion of the seatback, the headrest pad has an upper pad portion arranged to cover the front, upper, rear, left and right sides of the upper body portion, and a lower pad portion arranged on the front side of the lower body portion, the lower pad portion being continuous with a front lower portion of the upper pad portion, the body upper portion and the pad upper portion constitute a headrest main body portion facing the rear of the head of an occupant, The body lower part and the pad lower part form a neck rest part facing the neck part of an occupant, the body lower portion abuts against a front surface of the seat back upper portion via the skin, The vehicle seat has a lower pad portion that protrudes forward relative to an upper pad portion.

2. 2. The vehicle seat according to claim 1, wherein the body lower portion is formed in a plate shape.

3. 3. The vehicle seat according to claim 1, wherein a cross section of the lower portion of the pad as viewed from the left-right direction is formed in a semicircular shape that is convex toward the front.

4. 3. The vehicle seat according to claim 1, wherein both left-right end portions of the lower pad portion bulge forward relative to a central portion.

5. 5. The vehicle seat according to claim 4, wherein an airbag that is inflated and deflated by supplying and discharging air is disposed inside both ends of the neck rest portion.

6. 6. The vehicle seat according to claim 5, wherein the airbag is disposed between a front surface of the body lower portion and the lower portion of the pad.

7. 7. The vehicle seat according to claim 4, wherein both left and right end portions of the upper pad portion protrude forward relative to a center portion.

8. 7. The vehicle seat according to claim 1, wherein a front-to-rear thickness of the lower portion of the pad is greater than a front-to-rear thickness of a portion of the upper portion of the pad that is located in front of the upper body portion.

9. 8. The vehicle seat according to claim 1, wherein the neck rest portion has a vertical width greater than a vertical width of the headrest body portion.

10. The seat cushion is coupled to a vehicle floor via a slide device, 10. The vehicle seat according to claim 1, wherein an ottoman is provided at a front end of the seat cushion so as to be rotatable.

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