JP7096477B2 - Vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat with a necklace.

Some vehicle seats have a necklace attached to the headrest to support the neck of the occupant (for example, Patent Document 1). The necklace is positioned so as to project forward and downward with respect to the headrest and is located behind the occupant's neck.

Japanese Unexamined Patent Publication No. 2006-334055

Since the necklace comes into contact with the occupant, it is necessary to adjust the position appropriately according to the occupant's body shape, posture, and inclination of the seat back. However, when the necklace is provided on the headrest that can only move up and down with respect to the seat back, the adjustable direction is limited to only one direction, and the necklace cannot be placed in an appropriate position.

In view of the above background, it is an object of the present invention to enable the position of the necklace to be adjusted in the vehicle seat.

In order to solve the above problems, one aspect of the present invention includes a seat cushion (3), a seat back lower portion (5) rotatably provided at the rear portion of the seat cushion, and an upper end of the seat back lower portion. It has a rotatably provided upper part of the seat back (6) and a headrest (7) movably provided at the upper end of the upper part of the seat back so that the headrest faces the back of the occupant's head. Provided is a vehicle seat having a main body portion (71) and a necklace portion (72) that protrudes forward and downward from the lower front portion of the headrest main body portion and faces the neck portion of an occupant.

According to this aspect, since the headrest having the necklace portion is provided on the upper portion of the seat back rotatably provided with respect to the lower portion of the seat back, the necklace portion can be moved back and forth by rotating the upper portion of the seat back. Can be made to. As a result, the position adjustment range of the necklace portion is widened, and the necklace portion can be arranged at a position comfortable for the occupant.

Further, in the above invention, the headrest has a headrest pillar (62) extending from the headrest main body portion, and the upper portion of the seat back has a tubular pillar support member (59) for supporting the headrest pillar. It has 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 has the headrest drive device in response to a signal from the operation input device. It is preferable to further have a control device (21) for driving the.

According to this aspect, the headrest can be moved with respect to the upper part of the seat back by operating the operation input device.

Further, in the above invention, the seat back lower portion has a seat back lower portion driving device (15) for rotating the seat back lower portion with respect to the seat cushion, and the control device is from the operation input device. The seat back lower drive device is driven in response to a signal, and when the control device rotates the seat back lower portion rearward by the seat back lower drive device, the headrest drive device causes the headrest to move to the seat back. It may be lowered according to the amount of rotation of the lower part.

According to this aspect, the position of the necklace portion can be automatically adjusted when the lower portion 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 with respect to the upper part of the seat back. Therefore, by lowering the headrest, the necklace portion can be moved to an appropriate position according to the neck portion of the occupant.

Further, in the above invention, when the control device rotates the lower part of the seatback forward by the lower part of the seatback, the headrest drive device causes the headrest to rotate according to the amount of rotation of the lower part of the seatback. It is good to raise it.

According to this aspect, the position of the necklace portion can be automatically adjusted when the lower portion of the seat back rotates forward. When the lower part of the seat back rotates forward, the head of the occupant leaning on the seat back moves upward with respect to the upper part of the seat back. Therefore, by raising the headrest, the necklace portion can be moved to an appropriate position according to the neck portion of the occupant.

Further, in the above invention, the front lower seat back or the upper seat back has a seat back upper drive device (16) that rotates the upper seat back with respect to the lower seat back, and the control device is a control device. , The seat back upper drive device is driven in response to a signal from the operation input device, and the control device is the headrest drive device when the seat back upper part is rotated forward by the seat back upper drive device. It is preferable to raise the headrest according to the amount of rotation of the upper part of the seat back.

According to this aspect, the position of the necklace portion can be automatically adjusted when the upper part of the seat back rotates forward. When the upper part of the seat back rotates forward, the head of the occupant leaning on the seat back moves upward with respect to the upper part of the seat back. Therefore, by raising the headrest, the necklace portion can be moved to an appropriate position according to the neck portion of the occupant.

Further, in the above invention, when the control device rotates the upper part of the seatback backward by the upper driving device of the seatback, the headrest driving device causes the headrest to rotate according to the amount of rotation of the upper part of the seatback. It is good to lower it.

According to this aspect, the position of the necklace portion can be automatically adjusted when the upper part of the seat back rotates backward. When the upper part of the seat back rotates backward, the head of the occupant leaning on the seat back moves downward with respect to the upper part of the seat back. Therefore, by lowering the headrest, the necklace portion can be moved to an appropriate position according to the neck portion of the occupant.

Further, in the above invention, the lower portion of the seat back extends vertically with a pair of left and right first side members (46) rotatably coupled to the rear portion of the seat cushion at the lower end, and extends left and right at both left and right ends. It has a first cross member (47) coupled to each of the upper ends of the first side member, and the upper portion of the seat back extends vertically and is rotatably coupled to each of the first side members at the lower end. The seat back upper drive device has a pair of left and right second side members (51) and a second cross member (53) that extends to the left and right and is connected to each of the upper ends of the second side member at both left and right ends. , It is preferable that the second side member is provided on one of the left and right inner surfaces.

According to this aspect, the seat back upper drive device can be efficiently arranged inside the seat back upper part.

Further, in the above invention, at least one of the first side members is provided with a pin (56) protruding inward to the left and right, and the second side member receives the pin and the second side member. It is preferable that a slot (55) having a predetermined length is formed in the circumferential direction about the rotation axis of the second side member with respect to the side member.

According to this aspect, the rotation range of the upper part of the seatback with respect to the lower part of the seatback can be determined by the contact between the pin and the end of the slot.

Further, in the above invention, the necklace portion may have a shape in which the left and right sides bulge forward with respect to the center.

According to this aspect, the adhesion between the necklace portion and the occupant's neck is improved, and the necklace portion can stably support the occupant's neck.

Further, in the above invention, the necklace portion may have airbags (73) on the left and right sides of the front portion for adjusting the amount of bulging forward.

According to this aspect, the adhesion between the necklace portion and the occupant's neck is improved, and the necklace portion can stably support the occupant's neck.

According to the above aspect, since the headrest having the necklace portion is provided on the upper portion of the seat back rotatably provided with respect to the lower portion of the seat back, the necklace portion can be moved back and forth by rotating the upper portion of the seat back. Can be moved. As a result, the position adjustment range of the necklace portion is widened, and the necklace portion can be arranged at a position comfortable for the occupant.

According to the embodiment having the headrest drive device, the headrest can be moved with respect to the upper part of the seat back by operating the operation input device.

According to the embodiment in which the headrest is lowered by the headrest drive device according to the amount of rotation of the lower seat back when the control device rotates the lower seat back by the lower seat back drive device, the lower seat back is moved backward. When rotating, the necklace portion can be automatically lowered.

According to the embodiment in which the headrest is raised by the headrest drive device according to the amount of rotation of the lower seat back when the control device rotates the lower seat back forward by the lower seat back drive device, the lower seat back is forward. When rotating, the necklace portion can be automatically raised.

According to the embodiment in which the headrest is raised by the headrest drive device according to the amount of rotation of the upper part of the seatback when the control device rotates the upper part of the seatback forward by the upper drive device of the seatback, the upper part of the seatback is forward. When rotating, the necklace portion can be automatically raised.

According to the embodiment in which the headrest is lowered by the headrest drive device according to the amount of rotation of the upper part of the seatback when the control device rotates the upper part of the seatback backward by the upper drive device of the seatback, the upper part of the seatback is moved backward. When rotating, the necklace portion can be automatically lowered.

According to the aspect in which the seat back upper drive device is provided on one of the left and right inner surfaces of the first side member, the seat back upper drive device can be efficiently arranged inside the upper seat back.

According to the embodiment in which a pin projecting inward to the left and right is projected 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 seatback with respect to the lower part of the seatback. Can be determined.

According to the aspect in which the necklace part has a shape in which the left and right sides bulge forward with respect to the center, the adhesion between the necklace part and the occupant's neck is improved, and the necklace part stably supports the occupant's neck. can do.

According to the embodiment in which the necklace part has airbags on the left and right sides of the front part for adjusting the amount of bulge forward, the adhesion between the necklace part and the occupant's neck is improved, and the necklace part is used by the occupant. The neck can be supported with good stability.

Perspective view showing the standing posture of the vehicle seat Perspective view showing the relaxed posture of the vehicle seat Perspective view showing the frame of the vehicle seat Perspective view showing the upper frame of the seat back of the vehicle seat Side view of the first backside member and the second backside member on the left side as seen from the left and right inside, omitting the upper drive unit of the seat back. Cross section of the headrest

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 explanation, the left and right are determined based on the occupant seated on the seat. For the same configuration provided in pairs on the left and right, a common number will be assigned and the description will be omitted.

As shown in FIGS. 1 and 2, the seat 1 has a seat cushion 3 provided on the floor 2 of the 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 portion 5 rotatably provided at the rear end of the seat cushion 3 and a seat back upper portion 6 rotatably provided at the seat back lower portion 5. Further, the seat 1 has a headrest 7 movably provided at the upper end of the upper portion 6 of the seat back and an ottoman 8 rotatably provided at the front end of the seat cushion 3. The rotation axis of the lower seat back 5 with respect to the seat cushion 3, the rotation axis of the upper seat 6 with respect to the lower seat back 5, and the rotation axis of the ottoman 8 with respect to the seat cushion 3 extend in parallel to each other in the left-right direction.

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 project upward and are located on the side of the seat back lower portion 5, forming an armrest. A back cover 11 is provided at the rear of the lower seat back 5. The upper portion of the back cover 11 extends upward behind the seat back upper portion 6.

The seat surface 13 formed by the upper surface of the seat cushion 3 is tiltable 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 is moved upward with respect to the initial position.

As shown in FIG. 2, the seat 1 can take a relaxed posture in which the seat cushion 3 is tilted backward, the lower seat back 5 and the upper seat back 6 are tilted backward, and the ottoman 8 is deployed upward. The posture of the seat 1 shown in FIG. 1 is referred to as an upright posture.

The seat back lower portion 5 is provided with a seat back lower portion driving device 15 that rotates the seat back lower portion 5 with respect to the seat cushion 3. The seat back upper portion 6 is provided with a seat back upper drive device 16 that rotates the seat back upper portion 6 with respect to the seat back lower portion 5, and a headrest drive device 17 that moves the headrest 7 up and down with respect to the seat back upper portion 6. Has been done. The seat cushion 3 is provided with a seat cushion drive device 18 for inclining the seat surface 13 with respect to the floor 2 and an ottoman drive device 19 for rotating the ottoman 8 with respect to the seat cushion 3. Each of 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 has an electric motor and a driving force for transmitting the driving force of the electric motor. It has a transmission mechanism. The driving force transmission mechanism may include, for example, a reduction mechanism, a sector gear, or the like.

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 the control device 21. The control device 21 is an electronic control unit (ECU) including a CPU, a memory, an interface, and the like. An operation input device 22 for receiving an operation input by an occupant is connected to the control device 21. The control device 21 may be arranged below the seat cushion 3 or inside the side cover 10. The operation input device 22 may be provided on the upper surface of the side cover 10.

The operation input device 22 is for operating the rotation of the lower part 5 of the seat back, the rotation of the upper part 6 of the seat back, the vertical movement of the headrest 7, the inclination of the seat surface 13 of the seat cushion 3, and the rotation of the ottoman 8. Each switch has a relaxed posture switch for putting the seat 1 in a predetermined relaxed posture, and an standing posture switch for putting the seat 1 in a predetermined standing posture.

As shown in FIG. 3, the seat frame 30 forming the skeleton of the seat 1 has a cushion frame 31 constituting the seat cushion 3, a seat back lower frame 32 constituting the seat back 4, and a seat back upper frame 33. ing. The seat cushion 3 is configured by covering the cushion frame 31 with the pad and the skin material, and the seat back lower portion 5 and the seat back upper portion 6 are formed by covering the seat back lower frame 32 and the seat back upper frame 33 with the pad and the skin material. Will be done. The pad is formed of an elastic cushioning material such as polyurethane foam, and the skin material is formed of synthetic leather, fabric or the like.

The cushion frame 31 is connected to the floor 2 of the vehicle via the slide device 35. The slide device 35 has a rail and a plurality of slide rails including a slider movably supported by the rail. In the present embodiment, the slide device 35 extends to the left and right, which is a pair of left and right lower slide rails 36 extending back and forth, an intermediate frame 37 connected to the upper part of each lower slide rail 36, and an intermediate frame 37 connected to the intermediate frame 37 at the lower part. It has a pair of front and rear upper slide rails 38.

The cushion frame 31 includes a pair of left and right cushion side members 40 connected to the sliders of the upper slide rails 38, a front cross member 41 hung between the front portions of the cushion side members 40, and each cushion. It has a rear cross member 42 that is hung between the rear portions of the side member 40, and is formed in a frame shape. Further, the cushion frame 31 has a plate-shaped pan frame 43 rotatably supported by the left and right cushion side members 40. The pan frame 43 is rotatably supported at the rear end by an intermediate portion in the front-rear direction of the left and right cushion side members 40, and the front end is located above the front cross member 41.

A seat cushion driving 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 with respect to the cushion side frame.

The seat back lower frame 32 includes a pair of left and right first back side members 46 extending substantially vertically, a first upper cross member 47 spanned between the upper ends of the left and right first back side members 46, and a first back. It has a first lower cross member 48 spanned between the lower portions of the side member 46.

The lower ends of the left and right first backside members 46 extend downward from 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 drive device 15 is provided on the right side (inside in the left-right direction) of the lower end portion of the first back side member 46 on the left side. The seat back lower part drive device 15 changes the inclination angle of the seat back lower part 5 with respect to the seat cushion 3 by rotating the first back side member 46 with respect to the cushion side member 40.

As shown in FIGS. 3 and 4, the upper back frame is a second upper cross member 52 that connects a pair of left and right second backside members 51 extending vertically and upper ends of the left and right second backside members 51. And a second middle cross member 53 spanned between the intermediate portions of the left and right second backside members 51 in the vertical direction. Each second backside member 51 is formed of a plurality of sheet metal members, and the surfaces thereof face left and right. The second upper cross member 52 is arranged in front of the first upper cross member 47.

The lower end of each second backside member 51 is rotatably coupled to the corresponding intermediate portion of the first backside member 46 in the vertical direction. As shown in FIGS. 4 and 5, on the outer peripheral edge of the lower end of each of the second backside members 51, in the circumferential direction around the rotation axis of the second backside member 51 with respect to the first backside member 46. An extending slot 55 is formed. The slot 55 is a groove portion recessed from the outer peripheral edge of the lower end portion of the second backside member 51 toward the rotation axis side of the second backside member 51. Pins 56 projecting inward to the left and right are provided on the inner surface of each first backside member 46. Each pin 56 is received by the corresponding slot 55 and abuts on both ends in the circumferential direction of the slot 55 to regulate the rotation range of the upper back frame with respect to the seat back lower frame 32.

As shown in FIGS. 3 and 4, the seat back upper drive device 16 is provided inside (right side) of the lower end portion of the second back side member 51 on the left side. By aligning the seat back upper drive device 16 along the second back side member 51, the seat back upper drive device 16 can be efficiently arranged inside the seat back upper portion 6. The seat back upper drive device 16 changes the inclination angle of the seat back upper portion 6 with respect to the seat back lower portion 5 by rotating the second back side member 51 with respect to the first back side member 46.

The second upper cross member 52 is provided with a pair of left and right support brackets 58. Each support bracket 58 has a tubular shape with both ends open, and is coupled 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 tubular shape extending vertically.

As shown in FIG. 6, the headrest 7 includes a headrest body 61 forming the center of the headrest 7, a pair of left and right headrest pillars 62 coupled to the headrest body 61, and a headrest pad provided so as to cover the headrest body 61. It has 63 and a skin 64 that covers the headrest pad 63. The headrest body 61 is coupled to each headrest pillar 62 and has a body upper portion 65 extending left and right above the second upper cross member 52 and a body lower portion 66 extending downward from the front lower edge of the body upper portion 65. The lower part 66 of the body is formed in a plate shape, and the lower part thereof is arranged in front of the headrest pillar 62 and the lower part 5 of the seat back.

The headrest pad 63 is continuous with the pad upper portion 67 arranged so as to cover the front side, the upper side, the rear side, the left side and the right side of the body upper portion 65, and the front lower portion of the pad upper portion 67, and is arranged on the front side of the body lower portion 66. It has a pad lower portion 68. The pad lower portion 68 projects forward with respect to the pad upper portion 67. The cross section of the pad lower portion 68 viewed in the left-right direction is formed in a semicircular shape that is convex toward the front. Further, both ends of the pad lower portion 68 in the left-right direction bulge forward with respect to the central portion. Further, as in the pad lower portion 68, both ends of the pad upper portion 67 in the left-right direction may protrude forward with respect to the central portion. Further, the front-rear thickness of the pad lower portion 68 is preferably thicker than the front-rear thickness of the front side portion of the pad upper portion 67.

The upper body 65 and the upper pad 67 form the headrest main body 71, and the lower body 66 and the lower pad 68 form the necklace portion 72. The headrest main body 71 faces the back of the occupant's head, and the necklace portion 72 projects forward and downward from the lower front part of the headrest main body 71 and faces the occupant's neck. The vertical width of the necklace portion 72 is preferably larger than the vertical width of the headrest main body portion 71. The necklace portion 72 has a shape in which the left and right sides bulge forward with respect to the center. As a result, the adhesion between the necklace portion 72 and the occupant's neck can be enhanced, and the necklace portion 72 can stably support the occupant's neck.

As shown in FIGS. 1 and 6, an airbag 73 that expands and contracts due to the supply and discharge of air is arranged inside the left and right side portions of the necklace portion 72. The airbag 73 is 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 bulging forward on both the left and right sides of the front surface of the necklace portion 72 can be adjusted. As a result, the adhesion between the necklace portion 72 and the occupant's neck can be further enhanced, and the necklace portion 72 can stably support the occupant's neck.

As shown in FIG. 4, the pair of left and right headrest pillars 62 extend downward in parallel from the upper end connected to the upper body 65 to the rear of the lower body 66. Each headrest pillar 62 is inserted into the corresponding pillar support member 59 from above to below, and the lower end protrudes below the pillar support member 59.

A headrest drive device 17 is provided inside the upper portion 6 of the seat back. The headrest drive device 17 has a thin flat rectangular parallelepiped casing 75 in the front-rear direction. The upper part of the casing 75 is connected to the second upper cross member 52 by the bracket 76. Further, the rear surface of the lower portion of the casing 75 is connected to an intermediate portion of the wire 77 spanned between the left and right second backside members 51. When viewed from the front, the casing 75 is arranged below the second upper cross member 52 and between the left and right second backside members 51. Further, the casing 75 is arranged between the left and right virtual lines in which the axes of the left and right pillar support members 59 are externally inserted downward when viewed from the front. Further, when viewed from the front, the casing 75 is arranged above the second middle cross member 53.

Inside the casing 75, an electric motor and a driving force transmission mechanism for transmitting the driving force of the electric motor are provided. The driving force transmission mechanism has a pair of left and right output units 82 protruding outward from the left and right sides of the casing 75. The left and right output units 82 are arranged on the axis of the corresponding pillar support member 59. The tip (lower end) of the headrest pillar 62 is inserted into the upper portion of each output unit 82, and an engagement hole 83 that engages with the tip of the headrest pillar 62 is formed. Due to the rotation of the electric motor, the output unit 82 moves up and down along the slit 81 and along the axis of the headrest pillar 62. As a result, the headrest 7 including the necklace portion 72 moves in the axial direction of the headrest pillar 62 with respect to the seat back upper portion 6.

The control device 21 drives the seat back lower drive device 15 when the seat back lower portion 5 is rotated in response to a signal from the operation input device 22 for instructing the change of the inclination angle of the seat back lower portion 5. At the same time as rotating the lower part 5 of the seat back with respect to the seat cushion 3, the headrest drive device 17 is driven to move the headrest 7 up and down. Specifically, the control device 21 drives the seat back lower part drive device 15 to move the seat back lower part 5 to the rear in response to a signal from the operation input device 22 for rotating the seat back lower part 5 to the rear. At the same time as rotating, the headrest drive device 17 is driven to lower the headrest 7 according to the amount of rotation of the lower seat back 5. Further, the control device 21 drives the seat back lower portion driving device 15 to rotate the seat back lower portion 5 forward in response to a signal from the operation input device 22 for rotating the seat back lower portion 5 forward. At the same time, the headrest drive device 17 is driven to raise the headrest 7 according to the amount of rotation of the lower seat back 5. The amount of descent and the amount of ascent of the headrest 7 may be proportional to the amount of rotation of the lower seat back 5 to the rear and front.

The control device 21 drives the seat back upper drive device 16 when the seat back upper portion 6 is rotated in response to a signal from the operation input device 22 for instructing the change of the inclination angle of the seat back upper portion 6. At the same time that the upper portion 6 of the seat back is rotated with respect to the lower portion 5 of the seat back, the headrest drive device 17 is driven to move the headrest 7 up and down. Specifically, the control device 21 drives the seat back upper drive device 16 to move the seat back upper portion 6 to the rear in response to a signal from the operation input device 22 for rotating the seat back upper portion 6 to the rear. At the same time as rotating, the headrest drive device 17 is driven to lower the headrest 7 according to the amount of rotation of the seat back upper portion 6. Further, the control device 21 drives the seat back upper drive device 16 to rotate the seat back upper portion 6 forward in response to a signal from the operation input device 22 for rotating the seat back upper portion 6 forward. At the same time, the headrest drive device 17 is driven to raise the headrest 7 according to the amount of rotation of the seat back upper portion 6. The amount of descent and the amount of ascent of the headrest 7 may be proportional to the amount of rearward and forward rotation of the seat back upper portion 6.

The control device 21 drives only the headrest drive device 17 to lower or raise the headrest 7 with respect to the upper seat back 6 in response to a signal from the operation input device 22 for instructing the lowering or raising of the headrest 7. be able to. As a result, the occupant can adjust only the position of the headrest 7 after rotating the seat back lower portion 5 or the seat back upper portion 6 back and forth.

In the seat 1 configured as described above, since the headrest 7 having the necklace portion 72 is provided on the seat back upper portion 6 rotatably provided with respect to the seat back lower portion 5, the seat back upper portion 6 is rotated. As a result, the necklace portion 72 can be moved back and forth. As a result, the adjustment range of the necklace portion 72 is widened, and the necklace portion 72 can be arranged at a position comfortable for the occupant.

When the seat back lower portion 5 is rotated back and forth by the seat back lower drive device 15, the seat 1 lowers or raises the headrest 7 according to the rotation amount of the seat back lower portion 5 by the headrest drive device 17. When the back lower portion 5 rotates, the necklace portion 72 can be automatically arranged at an appropriate position. Similarly, when the seat back upper portion 6 is rotated back and forth by the seat back upper drive device 16, the seat 1 lowers or raises the headrest 7 according to the rotation amount of the seat back lower portion 5 by the headrest drive device 17. , When the seat back upper portion 6 rotates, the necklace portion 72 can be automatically arranged at an appropriate position.

Although the description of the specific embodiment is completed above, the present invention can be widely modified without being limited to the above embodiment. For example, the seat back upper drive device 16 may be provided in the seat back lower portion 5 instead of the seat back upper portion 6.

1: Seat 3: Seat cushion 4: Seat back 5: Seat back lower part 6: Seat back upper part 7: Headrest 15: Seat back lower drive device 16: Seat back upper drive device 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: First backside member 47: First upper cross member 51: Second back side member 52: Second upper Cross member 55: Slot 56: Pin 59: Pillar support member 62: Headrest pillar 71: Headrest body 72: Necklace 73: Airbag

Claims (6)

With a seat cushion,
A rotatably provided lower part of the seat back at the rear of the seat cushion,
An upper part of the seatback rotatably provided at the upper end of the lower part of the seatback, and
It has a headrest that can be moved up and down at the upper end of the upper part of the seat back.
The headrest has a headrest main body portion facing the back of the head of the occupant, and a necklace portion protruding forward and downward from the lower front portion of the headrest main body portion and facing the neck portion of the occupant .
The headrest has a headrest pillar extending from the headrest main body portion.
The upper part of the seat back includes a cylindrical pillar support member that supports the headrest pillar, and a headrest drive device that engages with the tip of the headrest pillar protruding from the pillar support member and moves the headrest pillar in the axial direction. Have,
It also has a control device that drives the headrest drive device in response to a signal from the operation input device.
The lower part of the seatback or the upper part of the seatback has a seatback upper part driving device that rotates the upper part of the seatback with respect to the lower part of the seatback.
The control device drives the seat back upper drive device in response to a signal from the operation input device.
When the seat back upper portion is rotated forward by the seat back upper drive device, the control device raises the headrest according to the amount of rotation of the seat back upper portion by the headrest drive device.
When the seat back upper portion is rotated backward by the seat back upper drive device, the control device lowers the headrest according to the amount of rotation of the seat back upper portion by the headrest drive device.
The lower portion of the seat back extends vertically to a pair of left and right first side members rotatably coupled to the rear portion of the seat cushion at the lower end, and extends to the left and right to each of the upper ends of the first side member at both left and right ends. It has a combined first cross member and
The upper portion of the seat back extends vertically and extends to the left and right with a pair of left and right second side members rotatably coupled to each of the first side members at the lower end, and ends of the upper ends of the second side member at both left and right ends. Each has a second cross member coupled to it
The seat back upper drive device is a vehicle seat characterized in that it is provided on one of the left and right inner surfaces of the second side member . The lower part of the seatback has a lower part of the seatback driving device that rotates the lower part of the seatback with respect to the seat cushion.
The control device drives the seat back lower drive device in response to a signal from the operation input device.
The control device is characterized in that when the seat back lower portion is rotated backward by the seat back lower drive device, the headrest drive device lowers the headrest according to the amount of rotation of the seat back lower portion. The vehicle seat according to claim 1 . The control device is characterized in that when the seat back lower portion is rotated forward by the seat back lower drive device, the headrest drive device raises the headrest according to the amount of rotation of the seat back lower portion. The vehicle seat according to claim 2 . At least one of the first side members is provided with a pin protruding inward to the left and right.
The second side member is formed with a slot that receives the pin and has a predetermined length in the circumferential direction about the rotation axis of the second side member with respect to the second side member. The vehicle seat according to any one of claims 1 to 3, wherein the seat is for a vehicle. The vehicle seat according to any one of claims 1 to 4 , wherein the necklace portion has a shape in which the left and right sides bulge forward with respect to the center. The vehicle seat according to claim 5 , wherein the necklace portion has airbags on the left and right sides of the front portion for adjusting the amount of bulging forward.

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