JP6580693B2 - Seat back advancer and vehicle seat - Google Patents

Description

  The present invention relates to a seat back forward-turning device that forwards a seat back of a vehicle seat in two stages, and a vehicle seat including the same.

  Japanese Patent Application Laid-Open No. 2004-133867 discloses a seat back forward-turning device that forwards a seat back in a vehicle seat forward in two stages in order to improve usability and prevent unintentional forward leaning. In other words, the forward tilting device described in Patent Document 1 regulates further forward tilting at an intermediate position where the seatback in the standing posture is unlocked by the reclining device operated by the user and forward tilted. To do. Further, when the user operates the operation lever, the forward restriction at the intermediate position is canceled, and further forward advancement to a complete forward position is possible.

JP 2010-234969 A

  In the seat back forward device described in Patent Document 1, the reclining device unlocks the seat back in the standing posture, and the intermediate posture forward restriction is canceled by the operation lever of the forward device. . That is, it is necessary to perform two rotation release operations from the standing posture to the fully forwarded posture by operating different devices. For this reason, there are many parts for rotation cancellation operation, and space saving is not easy. In addition, since the operation member is different between the two rotation releases, it is necessary to change the operation member. For this reason, especially for elderly people and rehabilitation patients, improvement has been expected so that the forward operation can be further facilitated.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a seat back forward device and a vehicle seat that can be moved forward in two stages, can save space, have a small number of parts, and can be easily moved forward. .

According to the first aspect of the present invention, there is provided a seat back forward-turning device for turning the seat back forward and rotating in two stages from the standing posture in a locked state with respect to the seat cushion,
A lock release portion that has a manually operable operation portion and releases the locked state of the seat back by movement of the operation portion in a first direction; When the movement unit is moved, the rotation regulation unit that restricts forward rotation at a predetermined rotation position and the operation unit moves by movement in a second direction different from the first direction, and the rotation regulation unit moves. A rotation restriction release unit that releases the restriction of forward rotation by the unit, and the rotation restriction release unit is restricted from turning movement in the first rotation direction and the second direction of the operation unit. And a link member that rotates in a second rotation direction opposite to the first rotation direction, and one end portion of the link member that is laid between the link member and the rotation restricting portion. It includes a cable coupled to the distal end portion of the member, who said operating portion of the second By moving to the accelerated rotation by the link said linked to the distal end portion the cable is pulled the rotation restricting portion of member together with the link member rotates moves in the second rotational direction There is provided a seatback forward-turning device characterized in that the regulation is released.

According to a second aspect of the present invention, there is provided a vehicle comprising: a seat cushion; a seat back; and a forward-turning device that causes the seat back to be forward-turned and rotated in two stages with respect to the seat cushion from a standing position in a locked state. Seat for
The forward-turning device has an operation unit that can be operated manually, and an unlocking unit that releases the locked state of the seat back by movement of the operation unit in a first direction; When the seat back is moved forward and rotated, the movement restricting portion that restricts the forward rotation at a predetermined rotation position and the movement of the operation portion in a second direction different from the first direction move. A rotation restriction release unit that releases the forward rotation restriction by the rotation restriction part, and the rotation restriction release part is restricted from turning movement in the first rotation direction . A link member that rotates in a second rotation direction opposite to the first rotation direction when moved in the second direction, and is laid between the link member and the rotation restricting portion. includes a cable having one end connected to the distal end portion of said link member, said steering Part be to move to the second direction, the link member is the second of said links the tip site linked the cable is pulled the rotating member while rotating movement in the rotational direction A vehicle seat is provided in which the restriction of the forward rotation by the restricting portion is released.

  According to the vehicle seat of the present invention, it is possible to carry out the two-stage forward movement, but it is possible to save space, reduce the number of parts, and facilitate the forward movement operation.

FIG. 1 is a view for explaining the posture change of the seat back of the vehicle seat according to the embodiment of the present invention. FIG. 2 is a view for explaining an operation unit in a forward-back device for a seat back used for a vehicle seat. FIG. 3 is a perspective assembly view of the operation system of the operation unit. FIG. 4 is a diagram for explaining a ratchet unit in the forward-turning device. FIG. 5 is a view for explaining the operation of the forward-turning device when releasing the lock in the seat back standing posture. FIG. 6 is a diagram for explaining the operation of the forward-turning device when releasing the rotation restriction in the intermediate posture of the seat back.

(Example)
An overall configuration of a vehicle seat and an attitude change of a seat back provided in the vehicle seat according to an embodiment of the present invention will be described with reference to FIG. In the embodiment, the vehicle is a right-hand drive automobile, and a vehicle seat (hereinafter simply referred to as a seat) 51 is used as a driver seat. FIG. 1 is a view of the sheet 51 as viewed from the right side.

  In FIG. 1, the forward direction of the vehicle (automobile) is defined as the forward direction, and the forward / backward / upward / downward directions are defined as FR, RR, UP, and LWR. Therefore, the front side of the page is the right direction, and the back side of the page is the left direction. The left-right direction is the width direction of the sheet 51. Vehicles are not limited to cars. Other examples include railway vehicles, aircraft, ships and the like.

  The seat 51 includes a seat cushion 1 serving as a seat and a seat back 2 serving as a backrest. A headrest 3 is detachably attached to the seat back 2. The seat cushion 1 is attached to a floor FL of a vehicle of an automobile via an attachment base 4. The seat back 2 is rotatable with respect to the seat cushion 1 through a forward tilting device 5 around a rotation axis CLa within a predetermined angle range.

  The seat back 2 is maintained in the three postures shown in FIGS. The posture shown in FIG. 1A is a standing posture in a normal use state, and can be maintained in a locked state in which forward rotation (forward rotation) and rearward rotation are restricted. The posture shown in FIG. 1 (c) is a fully forwarded posture that is forwarded from the standing posture. The posture shown in FIG. 1 (b) is an intermediate posture that is forwardly inclined between the standing posture and the fully forwarded posture. In the intermediate posture, forward rotation (forward rotation) is restricted.

  On the back surface of the seat back 2, a tray 2t is provided. The tray 2t is in a substantially horizontal position when the seat back 2 is in a fully forward position. Therefore, the seat 51 can be used as a table with the seat back 2 in the fully forward position.

  The forward-falling device 5 is covered with a decorative cover 6, and an operation unit 7 attached to the tip of an operation lever 15 (details will be described later) is disposed so as to be exposed from the decorative cover 6 so that it can be operated by hand. ing. The forward-retracting device 5 allows the seat back 2 to be moved forward in two stages by a moving operation in the first direction of the operation unit 7 and a moving operation in a second direction different from the first direction. Specifically, the seat 51 is operated by operating only the operation unit 7 to unlock the lock mechanism RK (see FIG. 2) that locks the seat back 2 in the standing posture and to release the forward rotation restriction in the intermediate posture. It can be done. Next, the structure of the forward movement device 5 will be described in detail with reference to FIGS.

  The forward-falling device 5 is disposed at the rear part of the seat 51. The forward-falling device 5 is configured as a set of an operation unit 5A provided on one of the left and right sides and a ratchet unit 5B provided on the other side at the connecting portion of the seat cushion 1 and the seat back 2. . When the seat 51 is mounted as a driver seat of a right-hand drive vehicle as in this example, the operation unit 5A is generally provided on the outside (door side) and the ratchet unit 5B is provided on the inside (passenger seat side). The internal and external arrangements are not limited to this. That is, the operation unit 5 </ b> A is provided on one side in the width direction of the sheet 51, and the ratchet unit 5 </ b> B is provided on the other side in the width direction of the sheet 51. Alternatively, the operation unit 5 </ b> A and the ratchet unit 5 </ b> B may be provided on the same side in the width direction of the seat 51.

(Operation unit 5A)
FIG. 2 is a view for explaining the operation unit 5A and corresponds to a right side view of the sheet 51 with the decorative cover 6 removed. In FIG. 2, schematic outlines of the seat cushion 1, the seat back 2, and the mounting base 4 are shown by two-dot chain lines. FIG. 2 shows the state of each member when the seat back 2 is in the standing posture. Hereinafter, the state in the standing posture is referred to as a reference state. FIG. 3 is an assembly diagram of the operation system of the operation unit 5A.

  As shown in FIGS. 2 and 3, the operation unit 5 </ b> A includes an operation side fixing bracket 11 fixed to the mounting base 4 side. A rotation axis CLa extending in the left-right direction is set in the upper part of the operation side fixing bracket 11, and the seat back 2 is rotated around the rotation axis CLa. In the standing posture, the seat back 2 is restricted from turning forward and backward by the lock mechanism portion RK (FIG. 2). Although not shown in detail, the lock mechanism portion RK has, for example, a lock groove, a lock plate that rotates integrally with the seat back 2, and a lock position at a rotation position where the seat back 2 stands up. And a wedge portion for restricting the rotation of the lock plate. Then, the engagement of the wedge portion is released by a predetermined rotation of a release arm 14 described later. Thereby, the seatback 2 can be moved forward from the standing posture.

  The restriction plate 12 is fixed to a portion in the vicinity of the rotation axis CLa in the operation side fixing bracket 11. The restriction plate 12 has an engagement rib 12a that protrudes to the right (the front side of the drawing in FIG. 2). A center-side end 13a of a spiral leaf spring 13 (hereinafter simply referred to as a spiral spring 13) disposed around the rotation axis CLa is engaged with the engagement rib 12a. The other end 13 b of the spiral spring 13 is engaged with an engagement bracket 2 a that is provided on the side of a frame (not shown) serving as a skeleton of the seat back 2 and protrudes to the right.

  The spiral spring 13 is reduced in diameter relative to the natural state by the engagement of the end portions 13a and 13b with the engagement rib 12a and the engagement bracket 2a. Thereby, the spiral spring 13 always urges the engagement bracket 2a and the seat back 2 integrated with the engagement bracket 2a in the clockwise direction of FIG. 2 (broken arrow F1).

  A release arm 14 is attached to the operation side fixed bracket 11 so as to be rotatable around the rotation axis CLa. The release arm 41 functions as a lock release unit. That is, the release arm 14 is rotated clockwise from the posture shown in FIG. 2 to release the rotation restriction of the seat back 2 by the lock mechanism portion RK. The release arm 14 has an arm portion 14a extending forward. A pin 14b protruding leftward is provided at the tip of the arm portion 14a.

  An operation lever 15 is attached to the lower front part of the fixed bracket 11 by a caulking pin 11a so as to be rotatable around a rotation axis CLb parallel to the rotation axis CLa. The operation lever 15 has an operation arm portion 15a that extends substantially forward from the rotation axis CLb. An operation portion 7 for facilitating operation with a finger is attached to the distal end of the operation arm portion 15a by integral molding of resin. The operation lever 15 has a release arm portion 15b extending generally upward from the rotation axis CLb. The distal end portion of the release arm portion 15b is in a position that is closest to the pin 14b of the release arm 14 in the reference state.

  A step bending portion 15a1 that gives a step in the left-right direction is formed at an intermediate portion of the operation arm portion 15a. One end portion 16a of a coil spring 16 as an urging member is locked to the step bending portion 15a1. Further, the other end 16 b of the coil spring 16 is locked to a locking pin 11 b provided on the fixed bracket 11. Due to these locks, the operation lever 15 is always urged in the clockwise direction of FIG. 2 around the rotation axis CLb by the elastic compressive force of the coil spring 16.

  Further, a forward link 17 is attached between the fixed bracket 11 and the operation lever 15 so as to be rotatable around the rotation axis CLb by a caulking pin 11a. In the reference state, the forward link 17 includes an abutting arm portion 17a extending obliquely upward in the front direction and a base arm portion 17b extending obliquely downward in the rear direction. A contact pin 17a1 stands upright on the contact arm portion 17a. The contact pin 17a1 interferes with the operation lever 15 by the rotation of the contact arm portion 17a around the rotation axis CLb. One end of the cable 18 is connected to the distal end portion of the base arm portion 17b. The portion excluding the end of the cable 18 is inserted into the sleeve 18a. The end of the sleeve 18a is fixed to the operation side fixing bracket 11 by a sleeve holder 18b.

  One end of a coil spring 19 as an urging member is locked to an intermediate portion of the base arm portion 17b. The other end of the coil spring 19 is locked (fixed) to a locking portion 11c on the fixed bracket 11 side. As a result, the forward link 17 is always urged counterclockwise in FIG. 2 around the rotation axis CLb by the elastic compression force of the coil spring 19.

  A stopper pin 11d is erected on the fixed bracket 11 so as to protrude rightward at a position below the rotation axis CLb. The stopper pin 11d abuts on the forward link 17 in the standing posture of the seat back 2, and restricts the counterclockwise rotation of the forward link in FIG.

  Further, the abutment pin 17a1 abuts on the operation lever 15 at the rotation position where the forward link 17 is restricted, and restricts the rotation of the operation lever 15 in the clockwise direction in FIG. This is because the counterclockwise torque applied to the forward link 17 based on the urging force of the coil spring 19 is greater than the clockwise torque applied to the operating lever 15 based on the urging force of the coil spring 16. This is because the characteristics and dimensions of each member are set so as to be dominant. Thereby, in the standing posture of the seat back 2, the operation lever 15 (operation unit 7) maintains the neutral position.

(Ratchet unit 5B)
FIG. 4 is a view for explaining the ratchet unit 5B, and is a left side view in a state where a decorative cover (not shown) that is normally covered is removed. In FIG. 4, similar to FIG. 2, the outline outlines of the seat cushion 1, the seat back 2, and the mounting base 4 are indicated by two-dot chain lines. FIG. 4 shows the state of each member when the seat back 2 is in the intermediate position. This state is also referred to as an intermediate state below.

  As shown in FIG. 4, the ratchet unit 5B has a ratchet side fixing bracket 31 fixed to the mounting base 4 side. A ratchet plate 32 is attached to an upper portion of the ratchet side fixing bracket 31 so as to be rotatable around a rotation axis CLa passing through the operation side fixing bracket 11.

  The ratchet plate 32 includes a round plate-like base portion 32a and a seat back coupling portion 32b extending outward in the form of a plate piece in the radial direction of the base portion 32a. A frame member on the seat back 2 side is fixed to the seat back coupling portion 32b. Further, the extending direction of the seat back connecting portion 32 b substantially coincides with the extending direction of the seat back 2.

  An arc-shaped locking protrusion 32a1 protruding leftward (in the direction of the paper surface of FIG. 4) is formed at a position near the rotation axis CLa of the base portion 32a. On the outer edge portion 32d of the base portion 32a, a step portion 32c is formed in which the distance Ra from the rotation axis CLa suddenly increases in a step shape. Specifically, the stepped portion 32c is formed such that the distance Ra increases in the radial direction in the clockwise direction in FIG.

  A rotation axis CLc parallel to the rotation axis CLa is set at the lower part of the ratchet side fixing bracket 31, and a claw plate 33 is attached to be rotatable around the rotation axis CLc. The claw plate 33 is always urged clockwise in FIG. 4 by a coil spring 34 as an urging member.

  The other end of the cable 18 is connected to the claw plate 33. One end of the cable 18 is connected to the forward link 17 of the operation unit 5A as described above. The sleeve 18a through which the cable 18 is inserted is supported by a sleeve holder 18c fixed to the ratchet side fixing bracket 31. The sleeve 18a is laid so as to pass under the seat cushion 1, for example, in a state where the cable 18 is inserted, and is connected to the operation unit 5A and the ratchet unit 5B.

  The claw plate 33 is configured to rotate counterclockwise in FIG. 4 when the cable 18 is pulled toward the operation unit 5A. The limit position of the rotation is defined by the contact of the claw plate 33 with the stopper 31a attached to the ratchet side fixing bracket 31.

  An arcuate engagement bracket 31b that protrudes to the left is attached to a position of the ratchet side fixing bracket 31 on the radially outer side of the ratchet plate 32. Further, at the outer peripheral edge of the ratchet plate 32, a plate-side locking protrusion 32a2 that protrudes to the left is provided at a position slightly opposite to the clockwise direction in FIG. .

  In the intermediate state, the engagement bracket 31b has an end portion on the outer peripheral side of a spiral leaf spring 35 (hereinafter simply referred to as a spiral spring 35) arranged so as to spiral around the rotation axis CLa. 35b is engaged. Further, the end 35 a on the center side of the leaf spring 35 is engaged with the locking protrusion 32 a 1 of the ratchet plate 32.

  The spiral spring 35 is reduced in diameter relative to the natural state by the engagement of the end portion 35a and the end portion 35b with the locking projection 32a1 and the engagement bracket 31b. Thereby, the spiral spring 35 urges the locking protrusion 32a1, in other words, the seat back 2 in the counterclockwise direction (forward direction) in FIG. 4 (broken arrow F2).

  The spiral spring 35 of the ratchet unit 5B and the spiral spring 13 of the operation unit 5A are urging members that urge the seat back 2 to rotate forward.

  The seat 51 can cause the seat back 2 to be moved forward in two stages by the forward moving device 5 having the operation unit 5A and the ratchet unit 5B described in detail above. Next, the forward movement operation of the seat back 2 will be described.

<Operation A: Forward rotation from a standing posture to an intermediate posture>
In the reference state that is the standing posture, the operation unit 5A is in the state shown in FIG. 2 as described above, and the forward and backward rotations of the seat back 2 are restricted (locked). In this reference state, the rotational positions of the seat back connecting portion 32b and the stepped portion 32c of the ratchet unit 5B are at the position N depicted by a two-dot chain line in FIG.

  In the seat back 2 in the standing posture, the operator first moves the operation unit 7 in the first direction. In this example, the first direction is upward, and the operation unit 7 is lifted upward by a finger against the biasing force of the coil spring 16 (FIG. 2: arrow DRa). By this operation, the operation lever 15 rotates counterclockwise in FIG. 2 about the rotation axis CLb.

  By this rotation, the operation lever 15 pushes the pin 14b of the release arm 14 and rotates the release arm 14 in the clockwise direction in FIG. 2 about the rotation axis CLa (FIG. 5: arrow DRb). FIG. 5 shows a state where the operation lever 15 is lifted and the release arm 14 is rotated. Since the lock of the standing posture is released by the rotation of the release arm 14, the elastic repulsive force of the spiral springs 13 and 35 is combined with the operator, and the operator can easily tilt the seat back 2 forward by hand.

  When the operator lifts his / her finger from the operation unit 7 after unlocking, the operation lever 15 returns to the reference state by the elastic repulsion force of the extended coil spring 16. The release arm 14 also returns to the reference state by a biasing member (not shown). The unlocking operation is a one-way operation that is executed only by the clockwise rotation of the releasing arm 14 in FIG. 2, and the unlocking state is maintained even when the releasing arm 14 returns.

  The ratchet plate 32 connected to the frame member 2b of the seat back 2 also rotates as the seat back 2 falls forward (rotates forward) from the standing position. Specifically, it rotates counterclockwise in FIG. 4 from the N position shown in FIG. 4 (FIG. 4: broken line arrow DRc). When the seat back 2 is rotated by a predetermined angle, the step 32c of the ratchet plate 32 is urged in the clockwise direction in FIG. 4 (FIG. 4: broken arrow DRd) around the rotation axis CLc. It abuts against the tip 33a of the plate 33 and further rotation is restricted. That is, the claw plate 33 functions as a rotation restricting portion for the ratchet plate 32. As a result, the seatback 2 is restrained from being turned forward and is maintained in an intermediate position unless it is returned to the rear by hand.

  When the seat 51 is used for a front seat of a passenger car having, for example, a two-door type and two rows of front and rear seats, the seat back 2 is maintained in an intermediate position, so that the passenger can easily get on and off the rear seat. Further, even when the forward operation is performed unintentionally, the rotation temporarily stops halfway, so that an event such as the seat back 2 striking the load placed on the seat cushion 1 can be avoided.

<Operation B: Forward rotation from the intermediate posture to the fully forward posture>
When shifting the seat back 2 from the intermediate position to the fully forward position, the operator moves the operation unit 7 that has been returned to the reference state in a second direction different from the first direction. In this example, the second direction is a lower direction opposite to the upper direction, which is the first direction, and the operating portion 7 is pushed downward with a finger against the biasing force of the coil spring 19 (FIG. 2). : Arrow DRe). By this operation, the operation lever 15 rotates in the clockwise direction in FIG. 2 about the rotation axis CLa.

  By this rotation, the operation lever 15 pushes the contact pin 17a1 of the forward link 17 to rotate the forward link 17 in the clockwise direction in FIG. 2 (FIG. 6: arrow DRf). FIG. 6 shows a state where the operation lever 15 is pushed down and the forward link 18 is rotated. The rotation of the operation lever 15 is regulated by the operation lever 15 coming into contact with the stopper pin 11d. As the forward link 17 rotates, the cable 18 connected to the tip of the base arm portion 17b is pulled in the direction of being pulled out from the sleeve 18a (FIG. 6: arrow DRg).

  When one end of the cable 18 is pulled toward the operation unit 5A by the rotation of the forward link 17, the claw plate 33 of the ratchet unit 5B to which the other end is connected is centered on the rotation axis CLc in FIG. It rotates counterclockwise (FIG. 4: arrow DRh). As a result, the contact between the tip 33a of the claw plate 33 and the step 32c of the ratchet plate 32 is released, and the ratchet plate 32 rotates in the counterclockwise direction (broken arrow DRc) in FIG. Permissible. Since this turning direction is a biasing direction by the spiral spring 35, the seat back 2 naturally turns forward and turns from the intermediate position when the claw plate 33 is detached from the step portion 32c (FIG. 4: arrow DRj). As described above, at least the cable 18 functions as a rotation restriction release unit that releases the rotation restriction of the ratchet plate 32 by the claw plate 33.

  When the rotation of the seat back 2 advances by the amount of the circumferential displacement between the plate side locking projection 32a2 and the engagement bracket 31b, the plate side locking projection 32a2 engages with the end portion 35b of the spiral spring 35. The end 35b is detached from the engagement bracket 31b. Thereby, the bending state of the spiral spring 35 is maintained without change.

  The posture change from the completely forward-facing posture to the standing posture can be executed at a time without being restricted by turning the seat back 2 by hand. When the seat back 2 is returned to the standing posture, the forward tilting device 5 returns to the reference state.

  As described above, according to the forward tilting device 5 and the seat 51 including the same, the unlocking of the standing posture and the release of the forward rotation restriction in the intermediate posture can be performed by manual operation of the same operation unit 7. . As a result, it is not necessary to expose the plurality of operation portions in the sheet 51 so that the space can be structurally saved. In addition, the design freedom of the sheet 51 increases. Further, since only one operation unit is required, the number of parts can be reduced.

  In addition, when the seat back 2 is moved forward from the standing posture to the fully forward posture, it is not necessary to hold the operating member, so that the forward operation is easy. In addition, an operation (movement of the operation unit) that performs unlocking in the standing posture and canceling forward rotation restriction in the intermediate posture is movement of the operation unit 7 in different directions. Thereby, there is little possibility that the lock release and the forward rotation restriction release are continuously performed unintentionally, and an event that the seat back 2 collides with an object placed on the seat cushion 1 is avoided, which is preferable.

  Further, since the different directions of the operation unit 7 are opposite directions (upward and downward in the above example), there is less possibility that the unlocking and the forward rotation restriction release are performed unintentionally and continuously. .

  The vehicle is not limited to an automobile, and may be a moving body that includes a vehicle body having a seat, such as an aircraft, a ship, and a railcar, and moves while the passenger is seated on the seat. The movement direction of the operation unit 7 (operation lever 15) performed by unlocking and releasing the forward rotation restriction is not limited to upward (upward rotation) and downward (downward rotation). The direction may be different, for example, forward and upward. Further, the different direction is more preferably the opposite direction. For example, left and right, front and rear, etc. may be used. Moreover, it is good also as a structure which rotates not only what moves the operation part 7 substantially linearly. In that case, the different directions may be clockwise and counterclockwise.

  INDUSTRIAL APPLICABILITY The present invention can be used for a seat mounted on a vehicle (an automobile, an aircraft, a ship, a railway car body, etc.) that moves an occupant in a sitting state.

Claims (3)

A seat back forward device for rotating the seat back against the seat cushion in two stages from the standing posture in a locked state.
It has an operation part that can be operated manually,
A lock release unit that releases the locked state of the seat back by movement of the operation unit in the first direction;
A rotation restricting portion for restricting forward rotation at a predetermined rotation position when the seat back released from the locked state is moved forward and rotated;
A rotation restriction release unit that moves by moving the operation unit in a second direction different from the first direction and releases the restriction of forward rotation by the rotation restriction unit;
With
The rotation restriction release unit is
A link member that is restricted in rotational movement in the first rotational direction, and that moves in the second rotational direction opposite to the first rotational direction by the movement of the operation portion in the second direction. When,
A cable laid between the link member and the rotation restricting portion and having one end connected to a tip portion of the link member ;
Have
By moving the operation portion in the second direction, the link member rotates in the second rotation direction, and the cable connected to the distal end portion of the link member is pulled and the link member is pulled. A seatback forward-turning device, wherein the forward-turning restriction by the turning restriction portion is released. The operation part and the unlocking part are provided on one side in the width direction of the seat back,
The rotation restricting portion is provided on the other side in the width direction of the seat back,
2. The seat back forward-turning device according to claim 1, wherein the cable is laid between the one side and the other side in the width direction of the seat back. A vehicle seat comprising: a seat cushion; a seat back; and a forward tilting device that pivots the seat back forward and in a two-stage manner from the standing position in a locked state with respect to the seat cushion.
The advance device is
It has an operation part that can be operated manually,
A lock release unit that releases the locked state of the seat back by movement of the operation unit in the first direction;
A rotation restricting portion for restricting forward rotation at a predetermined rotation position when the seat back released from the locked state is moved forward and rotated;
A rotation restriction release unit that moves by moving the operation unit in a second direction different from the first direction and releases the restriction of forward rotation by the rotation restriction unit;
With
The rotation restriction release unit is
A link member that is restricted in rotational movement in the first rotational direction, and that moves in the second rotational direction opposite to the first rotational direction by the movement of the operation portion in the second direction. When,
A cable laid between the link member and the rotation restricting portion and having one end connected to a tip portion of the link member ;
Have
By moving the operation portion in the second direction, the link member rotates in the second rotation direction, and the cable connected to the distal end portion of the link member is pulled and the link member is pulled. The vehicle seat according to claim 1, wherein the forward and backward rotation restriction by the rotation restriction portion is released.

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