JP6539481B2 - Vehicle seat - Google Patents

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a vehicle seat in which a seat back is divided into upper and lower parts and an angle can be changed in divided parts.

  As a vehicle seat provided with a seat cushion and a seat back, according to Patent Document 1, the seat back is divided into two in the vertical direction, and the split portion is configured to be bent forward in a concave direction when the seat cushion falls over. A rear seat for a vehicle is disclosed.

JP 10-86720 A

  However, in the prior art, the inclination angle of the seatback is determined to be one in accordance with the position of the seat cushion, and there is a problem that the inclination angle of the seatback can not be made in accordance with the preference of the occupant.

  Then, an object of this invention is to provide the vehicle seat which can change the inclination angle of the upper part of a seat back freely in the sheet | seat divided | segmented up and down.

  Another object of the present invention is to transmit power to the upper sheet efficiently.

  A vehicle seat according to the present invention, which solves the above problems, has a cushion frame supported so as to be movable back and forth with respect to the vehicle, a lower frame pivotally connected to the cushion frame, and a lateral direction with respect to the lower frame Seatback frame comprising an upper frame pivotally connected about an axis along the axis, and movement for vertically movably supporting the upper frame with respect to a support member located behind the upper frame And a tilting mechanism for tilting the upper frame relative to the support member.

  According to such a configuration, in the seat in which the upper frame is pivotable and foldable with respect to the lower frame, the inclination mechanism changes the inclination angle of the upper frame by tilting the upper frame with respect to the support member can do. That is, the inclination angle of the upper portion of the seatback can be freely changed.

  In the vehicle seat described above, the tilting mechanism is supported so as to be able to rotate back and forth with respect to the first fixing portion centering on the first fixing portion attached to the support member side and the first axis along the left-right direction, It can be set as the composition provided with the 1st movable part attached to the seat back side.

  According to such a configuration, since the first axis, which is the axis on which the first movable portion rotates, is along the same left-right direction as the axis of rotation of the upper frame and the lower frame, force is efficiently applied It can be transmitted to tilt the upper sheet.

  In the vehicle seat described above, the first fixed portion may be fixed to the support member, and the first movable portion may be attached to the moving mechanism.

  In the vehicle seat described above, the moving mechanism has a second fixed portion fixed to the support member, and a second movable portion movable up and down with respect to the second fixed portion, and the first fixed portion is the first fixed portion. The first movable portion may be attached to the seat back.

  In the vehicle seat described above, the tilting mechanism includes a first link rotatably coupled to the first fixed portion about a second axis parallel to the first axis, and a first link to the first movable portion. And a second link pivotally coupled about a third axis parallel to the one axis and pivotally coupled to the first link about a fourth axis parallel to the first axis be able to.

  In the above-described vehicle seat, the first axis is located above the first fixed portion and the first movable portion, and the first fixed portion and the first movable portion are centered on the first axis so that the lower side opens and closes. It is good also as composition rotated mutually. Alternatively, the first shaft is located below the first fixed portion and the first movable portion, and the first fixed portion and the first movable portion rotate relative to each other about the first shaft so that the upper side opens and closes. It can also be done.

  The vehicle seat described above includes an intermediate frame provided between the upper frame and the lower frame, and the upper end of the intermediate frame is pivotally coupled to the lower end of the upper frame about an axis along the left-right direction The lower end portion of the middle frame may be rotatably connected to an upper end portion of the lower frame about an axis along the left-right direction.

  According to such a configuration, since the seat back can be bent at two places, the seat back can be made more freely to the shape desired by the occupant.

  In the above-mentioned vehicle seat, the intermediate frame has a guide hole along the arc shape, the lower frame has a plurality of pins arranged spaced apart in the front and rear direction, and the plurality of pins engage with the guide holes By doing this, the middle frame and the lower frame may be pivotably connected.

  According to such a configuration, when the lower frame pushes up the middle frame, the middle frame can be pushed up in a stable state.

  According to the present invention, the inclination angle of the upper portion of the seatback can be freely changed.

  Further, according to the present invention, since the first axis, which is an axis along which the first movable portion rotates, is along the left-right direction, a force can be efficiently transmitted to the upper sheet to tilt the upper sheet.

It is a perspective view of a seat frame. It is a side view of a seat frame. (A) It is the elements on larger scale of FIG. 2, (b) is the perspective view which looked at the mounting bracket from back. It is a figure explaining the operation | movement of a vehicle seat, and shows the state which moved the cushion frame forward. It is a figure explaining the operation | movement of a vehicle seat, and shows the state which operated the tilting mechanism and made the upper frame lie. It is a side view of a seat frame of a vehicle seat concerning the 1st modification. It is a side view of a seat frame explaining operation of the vehicle seat concerning the 1st modification. It is a principal part enlarged side view of a seat frame of a vehicle seat concerning the 2nd modification. It is a side view of a seat frame explaining operation of the vehicle seat concerning the 2nd modification. It is a side view of the seat frame of the vehicle seat concerning the 3rd modification. It is a side view of a seat frame explaining operation of a vehicle seat concerning the 3rd modification. It is a principal part enlarged side view of a seat frame of a vehicle seat concerning the 4th modification. It is a principal part enlarged side view of a seat frame explaining operation of a vehicle seat concerning the 4th modification. It is a principal part enlarged side view of a seat frame explaining operation of a vehicle seat concerning the 4th modification.

  Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. As shown in FIG. 1, a vehicle seat S as an example of a vehicle seat is a seat mounted on a vehicle, and includes a seat back S1 and a seat cushion S2. A seat frame F is built in the vehicle seat S. The seat frame F includes a seat back frame F1 constituting a skeleton of the seat back S1 and a cushion frame F2 constituting a skeleton of the seat cushion S2. The seatback frame F1 is covered with a pad P1, and the cushion frame F2 is covered with a pad P2. In the present specification, front, rear, left and right, and upper and lower are based on an occupant sitting on the vehicle seat S.

  The seat back frame F1 has a lower frame 11 and an upper frame 12 formed by bending a pipe material.

  The lower frame 11 has a U-shape opened to the upper side, and includes a side frame 11C extending vertically and separated left and right, and a lower frame 11D connecting lower ends of the side frames 11C. In the lower frame 11D, two connection brackets 11A extending downward are provided separately at left and right.

  The upper frame 12 has a U-shape opened downward, and includes a side frame 12C extending vertically and separated left and right, and an upper frame 12D connecting upper ends of the side frames 12C. The left and right side frames 12C are connected by a seat back panel 13 made of sheet metal at a position below the upper frame 12D. Further, a bracket 12A is welded to lower end portions of the left and right side frames 12C. The bracket 12A is rotatably coupled to upper end portions of the left and right side frames 11C of the lower frame 11 about an axis B1 extending in the left-right direction.

  The cushion frame F2 has a main frame 21 made of a pipe material bent in a quadrangle in plan view. The main frame 21 is disposed to be separated left and right, and includes a side frame 21S extending longitudinally, a front frame 21B connecting the front ends of the left and right side frames 21S, and a rear frame 21C connecting the rear ends of the left and right side frames 21S. Have. Two connection brackets 21A extending upward are provided on the rear frame 21C so as to be separated left and right.

  The connection bracket 21A of the cushion frame F2 and the connection bracket 11A of the lower frame 11 are rotatably coupled to each other about an axis B2 extending in the left-right direction. Thus, the lower frame 11 of the seatback frame F1 is rotatably coupled to the cushion frame F2 about the axis B2.

  The cushion frame F2 is movably supported by the slide rail mechanism 25 with respect to the floor panel PF of the vehicle. The slide rail mechanism 25 includes a lower rail 25A and an upper rail 25B slidably engaged with the lower rail 25A in the front-rear direction. The lower rail 25A is fixed to the floor panel PF via the foot bracket 26. The upper rail 25B is fixed to the cushion frame F2.

  The cushion frame F2 is configured to be movable forward and backward with respect to the vehicle by the drive mechanism 30. Specifically, the drive mechanism 30 includes a motor 31, a gear box 32, and a screw shaft 33. The screw shaft 33 is disposed such that its longitudinal direction is forward and backward, and its front end is connected to the front frame 21B of the cushion frame F2. The gear box 32 is provided with a nut and a reduction gear (not shown) engaged with the screw shaft 33, and fixed to the floor panel PF. A motor 31 as a drive source is fixed to the gear box 32, and its output shaft is connected to the reduction gear in the gear box 32. Thereby, when the motor 31 is rotated forward or reversely, the cushion frame F2 can be moved back and forth by moving the screw shaft 33 forward or backward.

  As shown in FIG. 2, the upper frame 12 is supported by a back panel PB as an example of a support member located behind the upper frame 12 via a moving mechanism 40 and a tilting mechanism 50.

The moving mechanism 40 is a mechanism for supporting the upper frame 12 so as to be movable up and down with respect to the back panel PB, and as shown in FIG. 3A, the guide cylinder 41 as an example of the second movable portion A guide bar 42 and a mounting bracket 43 are provided as an example of the fixed portion.
The guide cylinder 41 is a cylindrical member having a guide hole of a circular cross section that penetrates up and down, and is fixed to the rear surface of the seat back panel 13. As shown in FIG. 1, two guide cylinders 41 are provided separately at the left and right.
The guide bar 42 is a bar having a diameter corresponding to the guide hole of the guide cylinder 41, and is provided along the vertical direction (the direction in which the side frame 12C of the upper frame 12 extends). The guide cylinder 42 has a guide hole through which the guide bar 42 is inserted, and can move up and down along the guide bar 42.

  As shown in FIG. 3A, the mounting bracket 43 is a member for fixing the guide bar 42 to the back panel PB side, and has a first bracket 44 and a second bracket 45. The first bracket 44 is a sheet metal bent in an L-shape, and has a support portion 44A extending substantially horizontally and a connection portion 44B extending upward from the rear end of the support portion 44A. The second bracket 45 is made of a sheet metal facing in the front-rear direction, and the lower end thereof is fixed to the connection portion 44B.

  As shown in FIG. 3B, on the rear surface of the second bracket 45, two rods 46 extending in the left and right direction are fixed apart vertically. The intermediate portion of the rod 46 is spaced rearward from the second bracket 45, and the left and right end portions are fixed to the rear surface of the second bracket 45 by welding or screwing.

  The tilting mechanism 50 is a mechanism for tilting the upper frame 12 with respect to the back panel PB, and includes a first fixed portion 51, a first movable portion 52, a first link 53, and a second link 54.

  The first fixing portion 51 is a plate-shaped member attached to the back panel PB side, and is directly fixed to the back panel PB by a bolt 59 in the present embodiment.

  The first movable portion 52 is a plate-like member supported so as to be able to rotate forward and backward with respect to the first fixed portion 51 about a first axis A1 extending in the left-right direction. The first axis A1 is positioned above the first fixed portion 51 and the first movable portion 52, and the first fixed portion 51 and the first movable portion 52 are mutually centered around the first axis A1 so that the lower side opens and closes. It can be turned. The first movable portion 52 is attached to the seatback frame F1 side. In the present embodiment, the first movable portion 52 is directly attached to the moving mechanism 40 and attached to the seat back frame F1 via the moving mechanism 40. More specifically, in the first movable portion 52, a pair of hooks 52A, which are disposed on the front surface so as to be vertically separated from each other, are arranged in two in the lateral direction (four in total). Each hook 52A has a tip extending upward and is engaged with the rod 46. That is, the mounting bracket 43 and the rod 46 as the second fixed portion are attached to the first movable portion 52 by the rod 46 being hooked from above onto each hook 52A, and the back panel PB is mounted to the back panel PB via the tilting mechanism 50. It is fixed.

  The first link 53 is a member rotatably coupled to the first fixed portion 51 about a second axis A2 parallel to the first axis A1. Although the shape of the first link 53 is not limited, it may be rod-like or plate-like.

  The second link 54 is pivotably coupled to the first movable portion 52 about a third axis A3 parallel to the first axis A1 and parallel to the first link 53 and parallel to the first axis A1. It is a member rotatably coupled about the fourth axis A4. Although the shape of the second link 54 is not limited, it may be rod-like or plate-like. The fourth axis A4 is located below the first link 53 and the second link 54, and the first link 53 and the second link 54 can rotate relative to each other so that the upper side opens and closes.

  As described above, the first fixed portion 51, the first movable portion 52, the first link 53, and the second link 54 constitute a four-bar link by being connected by four nodes. In the present embodiment, a rotary actuator 58 is provided in the vicinity of the first axis A1 as a drive member for driving the tilting mechanism 50. Although the detailed configuration of the rotary actuator 58 is not shown, it has an electric motor, a gear mechanism, etc., and the switch of the occupant operates the first movable portion 52 against the first fixed portion 51, as shown in FIG. The tilt angle of the first movable portion 52 can be changed by turning it counterclockwise or counterclockwise.

The operation of the vehicle seat S of the present embodiment configured as described above will be described.
As shown in FIG. 2, in the state in which the seat cushion S <b> 2 is positioned at the rearmost position in the movable range, the lower portion frame 11 of the seat back S <b> 1 is in the most upright state.

  When the seat cushion S2 is moved forward, the lower frame 11 moves forward along the moving direction of the slide rail mechanism 25 while the lower frame 11 is connected to the upper frame 12 as shown in FIG. To move downward along the guide bar 42. For this reason, the lower frame 11 is in a lying state (in a state where the inclination angle with respect to the floor panel PF is small) with respect to the standing state of FIG. In this state, the upper frame 12 has the same inclination angle as the state shown in FIG. 2, and depending on the physical constitution and physical condition of the occupant, the comfort may not be sufficiently good.

Therefore, in the vehicle seat S of the present embodiment, when the operation switch is operated to operate the rotary actuator 58, the first movable portion 52 pivots forward with respect to the first fixed portion 51 as shown in FIG. Do. As a result, the lower end of the first movable portion 52 moves forward with the upper end centering on the first axis A1, and the upper frame 12 is in a slightly laid state (in which the inclination angle with respect to the floor panel PF is reduced) . At this time, since the first axis A1 which is the rotation center of the first movable portion 52 and the first fixed portion 51 is along the same horizontal direction as the axis B2 of the rotation of the upper frame 12 and the lower frame 11, Power can be efficiently transmitted to the frame 12.
At this time, as the lower end of the upper frame 12 goes forward, the upper end of the lower frame 11 also goes forward, so the inclination angle of the lower frame 11 also changes so as to slightly occur.

  In order to return the vehicle seat S to the state of FIG. 2, the reverse operation to the above may be performed. That is, when the operation switch is operated to reversely operate the rotary actuator 58 and then the seat cushion S2 is moved rearward, the seat back S1 shown in FIG.

  Thus, according to the vehicle seat S of the present embodiment, not only can the lower frame 11 and the upper frame 12 interlock to change the inclination of the lower frame 11 by moving the seat cushion S2 back and forth, The upper frame 12 can be tilted relative to the back panel PB by the tilting mechanism 50. For this reason, the inclination angle of the upper frame 12 can be freely changed to realize a good seat shape according to the physical constitution of the occupant.

  In addition, since the first axis A1, which is an axis along which the first movable portion 52 rotates with respect to the first fixed portion 51, is along the same left-right direction as the axis B2 of rotation of the upper frame 12 and the lower frame 11. The power can be efficiently transmitted to the upper frame 12.

Although one embodiment of the present invention has been described above, the present invention can be appropriately modified and implemented without being limited to the above embodiment.
For example, as in the first modification shown in FIG. 6, the tilting mechanism 150 may be upside down with respect to the tilting mechanism 50 of FIG. That is, the first axis A1 is located below the first fixed portion 51 and the first movable portion 52, and the first fixed portion 51 and the first movable portion 52 center the first axis A1 so that the upper side opens and closes. It can also be configured to rotate relative to one another. The hook 52A may be fixed to the first movable portion 52 in the same direction as FIG. 2 so that the tip end is upward.

  In this case, as shown in FIG. 6, in the state where the lower frame 11 is laid by moving the seat cushion S2 forward, the rotary actuator 58 is actuated to rotate the first movable portion 52 forward, as shown in FIG. As shown, by moving the upper end of the first movable portion 52 forward, the upper portion of the upper frame 12 is moved forward, and the upper frame 12 is in a standing state. This makes it possible to improve the comfort according to the physical constitution of the occupant.

  In the embodiment, the rotary actuator 58 is operated by the electric motor, but may be constituted by a torque spring and a lock mechanism which are generally adopted for a reclining mechanism of a vehicle seat. . That is, a torque spring is disposed such that the first movable portion 52 is always urged forward, and the lock mechanism locks the angle of the first movable portion 52 with respect to the first fixed portion 51 at any position or stepwise position. Or it can be configured to be unlocked. According to this, the upper frame 12 can be tilted with a simple configuration without using the electric motor.

  Further, as in the second modified example shown in FIG. 8, the arrangement of the moving mechanism 240 and the tilting mechanism 250 may be reversed. That is, in the vehicle seat S, the guide bar 242 as the second fixing portion of the moving mechanism 240 is fixed to the back panel PB, and the guide cylinder 41 is attached to the first fixing portion 51 of the tilting mechanism 250. The first movable portion 52 of the tilting mechanism 250 is attached to the seat back panel 13 (upper frame 12) of the seat back S1.

Further, in the vehicle seat S of the second modified example, a linear actuator 260 is provided as a driving member for driving the tilting mechanism 250. The lower end portion 261A of the main body portion 261 of the linear actuator 260 is rotatably connected to the upper frame 12. Specifically, the upper frame 12 has a bracket 212A at its lower end, and the bracket 212A has an actuator fixing portion 212B extending downward. The lower end portion 261A of the linear actuator 260 is attached to the actuator fixing portion 212B. The linear actuator 260 has a rod 262 which can extend and contract with respect to the main body portion 261, and the upper end of the rod 262 is rotatably connected to the connecting portion of the fourth axis A4. The rod 262 can be moved linearly with respect to the main body portion 261 by an electric motor (not shown) or the like.

  With such a configuration as well, by operating the linear actuator 260, as shown in FIG. 9, the lower portion of the first movable portion 52 is moved forward with respect to the first fixed portion 51, and the upper frame 12 is laid down. Can.

  Further, as in the third modification shown in FIG. 10, an intermediate frame 320 can be provided between the upper frame 12 and the lower frame 311. In the vehicle seat S, the upper end portion of the middle frame 320 is rotatably connected about an axis B1 along the left and right direction with respect to the lower end portion of the upper frame 12, and the lower end portion of the middle frame 320 is the lower frame 311 It is connected rotatably around an axis B3 along the left-right direction with respect to the upper end. According to such a configuration, as shown in FIG. 11, the seat back S1 can be bent in two places, so that the seat back S1 can be made more freely by making the curve of the seat back S1 gentler, etc. It can be in the form of In addition, it is also possible to realize a more free shape by setting three or more places to be bent in the middle.

  In addition, as an example in which the number of folding points is two, it may be configured as in the fourth modification as shown in FIG. In the vehicle seat S according to the fourth modification, the middle frame 420 is formed of a substantially triangular plate-like member having a wide lower side, and the bracket 12A of the upper frame 12 so that the upper end portion can rotate around the axis B1. Is linked to The intermediate frame 420 has a guide hole 421 at the lower portion along an arc shape centering on the center point B5. The guide hole 421 extends substantially in the front-rear direction, and the center point B5 is located between the guide hole 421 and the axis B1.

  The lower frame 410 has pins 411 and 412 protruding outward in the left-right direction at the upper end. The pins 411 and 412 are spaced apart from each other, and the pin 411 is located in front of the pin 412. The pins 411 and 412 both enter the guide hole 421 and can move back and forth along the guide hole 421. As described above, since the guide hole 421 follows an arc shape centered on the center point B5, when the pins 411 and 412 move in the guide hole 421, the pins 411 and 412 rotate around the center point B5. Move as you want. That is, the lower frame 410 is rotatable with respect to the intermediate frame 420 about the center point B5.

  The connecting portion between the upper frame 12 and the middle frame 420 is provided with a locking mechanism 430 having a lever 431 extending downward. Although the detailed structure of the lock mechanism 430 is omitted, the lever 431 of the lock mechanism 430 is provided so as to be rotatable about the axis B1, and when the lever 431 is in the lock position shown in FIG. The rotation of the frames 420 is locked. When the lever 431 is in a position where it can be engaged with the pin 411 and is pushed forward by the pin 411 and positioned in the release position as shown in FIG. The locking of the mutual rotation of the frames 420 is released so that they can freely rotate. In addition, the lock mechanism 430 has a biasing member (not shown) that always biases counterclockwise, and rotation of the lever 431 in the counterclockwise direction is stopped by a stopper (not shown) as shown in FIG. It is regulated at the position shown in.

  According to such a configuration, when the seat cushion is moved forward from the state where the seat back S1 shown in FIG. 12 is erected, as shown in FIG. 13, since the lock mechanism 430 is in the locked state, the middle frame 420 is the upper frame Without movement relative to 12, only the lower frame 410 pivots clockwise relative to the upper frame 12 and the middle frame 420.

  Then, when the lever 431 is pushed forward by the pin 411 and positioned at the release position, the rotation lock of the intermediate frame 420 is released, and the intermediate frame 420 can rotate with respect to the upper frame 12. Then, when the seat cushion S2 is further moved forward from the state shown in FIG. 13, the pin 411 strikes the front end of the guide hole 421 and pushes the lower end of the intermediate frame 420 forward, as shown in FIG. Rotate around. As a result, the inclination angle of the intermediate frame 420 changes, and the entire seat back can be formed into a gentle curve.

  On the other hand, when the seat cushion S2 is moved backward from the state shown in FIG. 14, the lower frame 410 rises and pushes up the middle frame 420 by the pins 411 and 412 at the upper end. At this time, since the lever 431 of the lock mechanism 430 is biased toward the pin 411, it is possible to suppress the middle frame 420 from being shaken. In addition, since the middle frame 420 is pushed up by the two pins 411 and 412 separated from each other, this also suppresses the middle frame 420 from being shaken.

  Then, when the seat cushion S2 is further moved backward from the state shown in FIG. 13, the lower frame 410 further rises, and the pins 411 and 412 at the upper end of the lower frame 410 push up the middle frame 420. At this time, since the lock mechanism 430 is locked by the lever 431 returning to the rear lock position, the rotation of the upper frame 12 and the intermediate frame 420 is restricted and integrated with each other, and in a stable state, upward. It can move.

  As described above, according to the vehicle seat S according to the fourth modification, the locking mechanism 430 regulates the mutual rotation of the intermediate frame 420 and the upper frame 12 until the seat cushion S2 moves forward by a predetermined amount or more. Thus, the operation of the seat frame F can be stabilized. Further, since the pivotal connection of the intermediate frame 420 and the lower frame 11 is configured by the engagement of the two pins 411 and 412 and the guide hole 421, the seat cushion S2 is moved rearward to move the intermediate frame 420. When pushing up, the intermediate frame 420 can be pushed up in a stable state.

  In the fourth modification, two pins are engaged with the guide holes 421, but three or more pins may be engaged.

  Moreover, in the said embodiment, although the 1st fixing | fixed part 51 and the 1st movable part 52 were made into the plate-shaped member, these shapes are not specifically limited, You may comprise the flame | frame by a rod-shaped member .

  Moreover, in the said embodiment, although the vehicle seat of the motor vehicle was illustrated as a vehicle seat, the vehicle seat may be not only a vehicle seat but a seat of a rail car, an aircraft, a ship, etc. .

11 lower frame 12 upper frame 13 seat back panel 25 slide rail mechanism 30 drive mechanism 40 moving mechanism 41 guide cylinder 42 guide bar 43 mounting bracket 50 tilting mechanism 51 first fixed portion 52 first movable portion 53 first link 54 second link 58 Rotary Actuator F Seat Frame F1 Seat Back Frame F2 Cushion Frame PB Back Panel PF Floor Panel S Vehicle Seat S1 Seat Back S2 Seat Cushion

Claims (9)

A cushion frame movably supported back and forth relative to the vehicle;
A seat back frame comprising: a lower frame rotatably connected to the cushion frame; and an upper frame pivotally connected to the lower frame about an axis along the left-right direction;
A moving mechanism which supports the upper frame movably up and down with respect to a support member located behind the upper frame;
And a tilting mechanism for tilting the upper frame relative to the support member ,
The tilting mechanism is provided with a hook whose tip extends upward,
The vehicle seat according to claim 1, wherein the moving mechanism is attached to the tilting mechanism by being hooked to the hook from above . A cushion frame movably supported back and forth relative to the vehicle;
A seat back frame comprising: a lower frame rotatably connected to the cushion frame; and an upper frame pivotally connected to the lower frame about an axis along the left-right direction;
A moving mechanism which supports the upper frame movably up and down with respect to a support member located behind the upper frame;
And a tilting mechanism for tilting the upper frame relative to the support member ,
The tilting mechanism is supported so as to be able to rotate back and forth with respect to the first fixing portion around a first fixing portion attached to the support member side and a first axis extending in the lateral direction, and the seat back frame A first movable portion attached to the side, a first link rotatably coupled to the first fixed portion about a second axis parallel to the first axis, and the first movable portion Correspondingly, it is pivotally connected about a third axis parallel to the first axis and pivotally connected to the first link about a fourth axis parallel to the first axis. With the second link,
The vehicle seat according to claim 1, further comprising: a driving member configured to drive the first movable portion relative to the first fixed portion such that the inclination angle of the first movable portion can be changed by an operation of a passenger . The tilting mechanism is supported so as to be able to rotate back and forth with respect to the first fixing portion around a first fixing portion attached to the support member side and a first axis extending in the lateral direction, and the seat back frame And a first movable part attached to the side,
The vehicle seat according to claim 1 , wherein the first fixed portion is fixed to the support member, and the first movable portion is attached to the movement mechanism. The tilting mechanism is supported so as to be able to rotate back and forth with respect to the first fixing portion around a first fixing portion attached to the support member side and a first axis extending in the lateral direction, and the seat back frame And a first movable part attached to the side,
The moving mechanism has a second fixed portion fixed to the support member, and a second movable portion movable up and down with respect to the second fixed portion.
The vehicle seat according to claim 1 , wherein the first fixed portion is attached to the second movable portion, and the first movable portion is attached to the seat back frame .   The tilting mechanism is provided with a hook whose tip extends upward,
  The vehicle seat according to claim 2, wherein the moving mechanism is attached to the tilting mechanism by being hooked from above onto the hook. The tilting mechanism
A first link rotatably coupled to the first fixed portion about a second axis parallel to the first axis;
The first movable portion is rotatably coupled to a third axis parallel to the first axis and is rotatable about a fourth axis parallel to the first axis with respect to the first link. It possesses a rotatably linked second link,
The vehicle seat according to claim 3 or 4 , wherein the hook is located between the first axis and the fourth axis in the vertical direction . The vehicle seat according to claim 5 , wherein the hook is located between the first axis and the fourth axis in the vertical direction .   The moving mechanism includes a second fixed portion attached to the first movable portion, and a second movable portion which is vertically movable with respect to the second fixed portion and fixed to the seat back frame side. Equipped
  The second fixing portion is bent forward such that an upper end portion thereof is separated from the first axis, according to any one of claims 2, 3, 5, and 7. Vehicle seat described. An intermediate frame provided between the upper frame and the lower frame;
The upper end portion of the intermediate frame is rotatably connected about an axis along the left-right direction with respect to the lower end portion of the upper frame, and the lower end portion of the intermediate frame is horizontally rotatably coupled about the axis along,
The intermediate frame has a guide hole along an arc shape,
The lower frame has a plurality of pins spaced apart forward and backward,
The vehicle according to any one of claims 1 to 8, wherein the intermediate frame and the lower frame are rotatably connected by the plurality of pins engaging with the guide holes. Seat.

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