JP2011245990A - Seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat having a walk-in mechanism, which achieves flip-up of a seat cushion while canceling restriction on forward leaning of a seat back and canceling seat slide unlocking with a simple mechanism.SOLUTION: The seat includes, in a seat support rail 10 side: a walk-in unlock lever 53 which releases a lock of a seat slide lock mechanism 80 that locks a slide of a seat cushion 20 at a normal use position, when a seat back 30 is revolved to lean forward, via a linkage cutoff lever 50 and a linkage lever 52; a seat cushion lock lever 41 locking the seat cushion 20 at the normal use position; and further includes, in a rear end of the seat cushion 20, a grip 25 that unlocks the seat cushion lock lever 41 and flips forward the seat cushion 20. In an unlocked state of the seat cushion lock lever 41, the linkage cutoff lever 50 cuts off transmission of the forward leaning operation of the seat back 30 and cancels slide unlocking of the walk-in unlock lever 53.

Description

  The present invention relates to a seat having a walk-in mechanism.

  Conventionally, for example, the seat in the second row of a three-row seat of a passenger car has a seat back tilted forward and a forward sliding movement of the entire seat seat in order to facilitate getting on the rear seat and getting off from the rear seat. There is known one provided with a walk-in mechanism that enables this (Patent Documents 1 and 2). Furthermore, in these prior arts, a seat storage mechanism has been proposed in which the seat cushion is flipped forward and then the seat back is tilted forward so that the back surface of the seat back can be used as a table or the like.

In the conventional walk-in mechanism described in Patent Document 1, the cushion locking mechanism includes a fork member and a claw member, and cancels unlocking of the seat slide mechanism in conjunction with an operation of a manual operation member connected to the claw member. A walk-in cancellation mechanism is provided. In this prior art, when the manual operation member is operated, the unlocking of the walk-in cancel mechanism is canceled via the claw member and the wire, the fork member releases the striker, and the claw member is disengaged. By holding the seat cushion, the seat cushion can be flipped forward. The cushion lock mechanism and the walk-in cancel mechanism are connected by a wire.
In the seat of the patent document 2, when the seat cushion is in the normal use position, the forward tilt rotation of the seat back is restricted at the intermediate forward tilt position, but when the seat cushion is away from the normal use position, This is a configuration in which the restriction of the forward tilt rotation of the seat back is canceled, and the forward tilt of the seat back becomes possible.

JP 2004-237922 A (Patent No. 4150607) JP 2003-182416 A (Patent No. 3833936)

However, the conventional configuration described in Patent Document 1 connects the cushion locking mechanism and the walk-in cancel mechanism with a wire, and further connects the seat back and the walk-in cancel mechanism with a wire. The mechanism was complicated.
Patent Document 2 does not include a seat cushion locking mechanism that locks the seat cushion in the normal use position. Therefore, even if the seat cushion locking mechanism described in Patent Document 1 is applied to Patent Document 2, the seat cushion locking mechanism is required separately, resulting in an increase in weight and complexity of the mechanism. There was a problem that the operability was not improved at all.

  In view of the problems of the prior art, the present invention enables the release of the seat back forward tilt restriction and the cancellation of the release of the seat slide lock by the unlocking operation of the seat cushion in the seat having the walk-in mechanism. An object is to provide a seat with a simple mechanism.

  In order to solve the problems of the prior art, the present invention provides a seat slide mechanism for slidably supporting a seat, a seat slide lock mechanism for locking the slide of the seat at a use position, and a seat back of the seat. And a walk-in mechanism that releases the lock of the seat slide lock mechanism in conjunction with the forward tilt rotation when tilting forward to a forward tilt angle, and the seat back after the seat cushion of the seat is flipped forward A cushion locking mechanism that locks the seat cushion in a normal use position, and a forward tilt regulating mechanism that regulates forward tilt rotation of the seat back at the intermediate forward tilt angle; A cancel mechanism for canceling unlocking of the seat slide lock mechanism, and the cushion lock Together to unlock the structure is characterized in that an operating member for shifting the restriction release state and said canceling mechanism the front 傾規 system mechanism to cancel state.

More practically, the forward tilt restricting mechanism restricts the unlocking of the cushion lock mechanism by the operation member when the forward tilt rotation of the seat back is restricted at the intermediate forward tilt angle.
Preferably, the operation member is provided on the seat cushion side, and the cushion lock mechanism, the forward tilt restriction mechanism, and the cancellation mechanism are provided on the side that supports the seat cushion.
The operation direction of the operation member is a direction in which the seat cushion is flipped up.
The seat cushion is pivotally supported by the seat slide mechanism so that it can be flipped forward, and the operation member is mounted on the rear end side of the seat cushion.

  In the seat of the present invention, the seat cushion engages with the seat cushion when the seat cushion is in a normal use position, and the engagement with the seat cushion is interlocked with the seat cushion jumping operation by the operation member. It is preferable to include a seat cushion lock lever that is disengaged and a forward tilt restriction lever that releases the forward tilt rotation restriction of the seat back in conjunction with the rotation of the seat cushion lock lever.

  In the seat of the present invention, there is provided a seat cushion lock lever that releases engagement with the seat cushion in conjunction with a seat cushion flip-up operation by the operation member and releases the forward tilt rotation restriction of the seat back. Prepare.

  Furthermore, the seat of the present invention includes a turnover spring that urges the seat cushion lock lever to rotate, and the turnover spring urges the seat cushion lock lever to engage with the seat cushion. When the seat cushion lock lever is rotated in the forward tilt rotation restriction release direction, the rotation biasing direction is reversed.

  According to the present invention, the seat cushion is unlocked and the forward tilt restricting mechanism is released by simply releasing the lock of the cushion lock mechanism in order to raise the seat cushion. Since the release is canceled, the seat back can be tilted forward, and a seat that does not slide even when the seat back is tilted forward can be obtained with a simple mechanism.

It is the figure which showed one Embodiment of the seat provided with the walk-in cancellation apparatus by this invention, Comprising: (A) is a normal use state, (B) is a walk-in state, (C) is a seat cushion jumping-up state, (D) is a side view of the sheet storage state. It is the side view which expanded and showed the principal part in the normal use state of the embodiment. It is the side view which expanded and showed the principal part in the walk-in state of the embodiment. It is the side view which expanded and showed the principal part in the seat cushion flip-up state of the embodiment. It is the side view which expanded and showed the principal part in the sheet storage state of the embodiment. It is the figure which showed 2nd embodiment of the seat with the walk-in cancellation apparatus by this invention, Comprising: (A) is a normal use state, (B) is a walk-in state, (C) is a seat-cushion raising state. (D) is a side view of the sheet storage state. It is the side view which expanded and showed the principal part in the normal use state of the 2nd embodiment. It is the side view which expanded and showed the principal part in the walk-in state of the second embodiment. It is the side view which expanded and showed the principal part in the seat cushion flip-up state of the 2nd embodiment. It is the side view which expanded and showed the principal part in the sheet storage state of the 2nd embodiment. It is the perspective view which decomposed | disassembled and showed the principal part of the walk-in cancellation apparatus.

  1 to 10 show main components in a side view of a vehicle seat having a walk-in cancel device. In each figure, the left direction is the front of the vehicle. The seat includes a seat support rail 10, a seat cushion 20, and a seat back 30 that are arranged on the vehicle floor, but only these side surfaces are shown in the figure. The seat support rail 10 constitutes a seat slide mechanism having a lower rail 11 fixed to the vehicle floor and an upper rail 12 slidably engaged with the lower rail 11. The lower rails 11 are fixed to the floor so that a pair of the rails 11 extend in the front-rear direction of the vehicle in parallel at a predetermined interval. A side base 13 extending in the front-rear direction along the upper rail 12 is fixed on the upper rail 12.

  The seat cushion 20 is connected to the side base 13 by link plates 22 fixed to both sides of the front end portion of the bottom surface. In the illustrated embodiment, the front end portion and the rear end portion of the link plate 22 are pivotally attached to the seat cushion 20 and the upper rail 12 via shafts 22a and 22b. The seat cushion 20 is normally held in a normal use state substantially parallel to the upper rail 12. When the seat is retracted, the rear end side is flipped up with the shaft 22a at the front end portion of the seat cushion 20 as an axis, and the seat cushion is held in a state of being substantially orthogonal to the upper rail 12.

  A seat back bracket 32 is rotatably mounted on the rear end portion of the side base 13 via a seat back shaft 33. The seat back 30 is fixed to the seat back bracket 32, and is supported so as to be swingable about the seat back shaft 33 as an axis, and to be adjustable to an arbitrary inclination angle by a reclining mechanism (not shown).

  At the rear end of the side surface of the seat cushion 20, a cushion lock pin 23, a cushion lock release lever 24, and a cushion lock release lever 24 as a cushion lock member constituting a cushion lock mechanism that locks the seat cushion 20 in the normal use position are provided. A connected cushion handle 25 is provided. The cushion handle 25 is a handle for causing the cushion lock release lever 24 to rotate and release the cushion lock, and to raise and rotate the seat cushion 20 to the retracted position, and constitutes an operation means with the cushion lock release lever 24. To do. The cushion handle 25 is formed integrally with the cushion lock release lever 24 or as a separate body, and is connected to the cushion lock release lever 24.

  The cushion lock release lever 24 is a plate-like member having a substantially L-shaped side surface, and is pivotally supported by the seat cushion 20 via a shaft 24a at an L-shaped corner. The cushion handle 25 is connected to one end of the cushion lock release lever 24 via a shaft 25a. At the other end of the cushion lock release lever 24, a pressing portion 24b that presses and rotates the seat cushion lock lever 41 is formed. The seat cushion lock lever 41 is a plate-like member having a substantially L shape, and is pivotally supported by the side base 13 via a shaft 41a in an L-shaped corner region.

  When the cushion handle 25 is pulled up in the direction of lifting the seat cushion 20, the cushion lock release lever 24 rotates in the cushion lock release direction (clockwise in the figure), and the pressing portion 24 b unlocks the seat cushion lock lever 41. The hook portion 41b is removed from the cushion lock pin 23 by rotating it in the direction (clockwise in the figure) to release the cushion lock.

  The seat cushion lock lever 41 is pivotally supported on the side base 13 via a shaft 41 a and includes a hook portion 41 b that engages with the cushion lock pin 23 at one end. In the normal use state, the hook portion 41b engages with the cushion lock pin 23 to prevent the seat cushion 20 from jumping up. The tip of the hook portion 41 b is a pressing portion 41 c that is pressed by the pressing portion 24 b of the cushion lock release lever 24.

  The seat cushion lock lever 41 is connected via a linkage plate 42 to a forward tilt regulating lever 43 that regulates forward tilt rotation of the seat back 30. The forward tilt restricting lever 43 is pivotally supported by a shaft 43a fixed to the side base 13 at a substantially central portion. The link plate 42 connects the seat cushion lock lever 41 and the forward tilt restricting lever 43 via connecting shafts 42 a and 42 b at both ends thereof.

  A turnover spring 44 is stretched between the seat cushion lock lever 41 and the side base 13. The turnover spring 44 urges the seat cushion lock lever 41 to rotate in a lock position direction in which the hook portion 41b engages and locks the cushion lock pin 23 in the normal use state. When the seat cushion lock lever 41 is rotated in the unlocking direction away from the cushion lock pin 23, the turnover spring 44 reverses the rotational biasing direction when a specific rotational position (turning point, dead point) is exceeded. Thus, the seat cushion lock lever 41 is urged to rotate in the unlocking direction in which the hook portion 41 b is separated from the cushion lock pin 23. Thus, when the seat cushion lock lever 41 is located in the rotation area on the cushion lock pin 23 side with the specific rotation position of the seat cushion lock lever 41 in between, the seat cushion lock lever 41 is in the locking direction and is opposite to the cushion lock pin 23. When it is located in the rotation area, it is urged to rotate in the unlocking direction.

  In the seat normal use state, the seat seat is regulated to rotate by the forward tilt restricting lever 43 coming into contact with the forward tilt stopper 45 fixed to the side base 13. When the seat back 30 is pivoted forward while the forward tilt regulating lever 43 is pivotally regulated, the forward tilt regulating projection 32 a of the seat back bracket 32 that pivots integrally with the seat back 30 is a stopper of the forward tilt regulating lever 43. Abutting on the portion 43b, forward tilt rotation is restricted (blocked) at the intermediate forward tilt angle. Since the other end surface of the stopper portion 43b is in contact with the forward tilt stopper 45 and the forward tilt restricting lever 43 is restrained from tilting forward, the seat back 30 stops at the intermediate forward tilt pivot angle. This intermediate forward tilt angle is the walk-in forward tilt position.

  When the seat cushion lock lever 41 is rotated in the unlocking direction and the urging direction of the turnover spring 44 is reversed, the forward tilt regulating lever 43 can be tilted forward by the reverse urging force of the turnover spring 44. Rotate to the forward tilt rotation restriction release position. Since the forward tilt rotation restriction release state is a state in which the restriction portion 43c has moved out of the rotation locus of the forward lean restriction protrusion 32a, the forward lean restriction protrusion 32a is interfered even when the seat back 30 is turned forward. Therefore, the seat back 30 can be rotated forward most forwardly beyond the walk-in forward tilt position.

A seat back bracket 32 of the seat back 30 is pivotally supported by the side base 13 via a seat back shaft 33 so as to be swingable. A seat back interlocking lever 34 is pivotally supported on the seat back shaft 33 so as to be rotatable independently of the seat back bracket 32. A linkage member 35 is fixed to the seat back bracket 32. The linking member 35 abuts on the linking part 34a of the seat back interlocking lever 34 in the process in which the seat back 30 is pivoting forward in the walk-in operation (in the middle of the forward tilting rotation), and the seat back interlocking lever 34 is moved. Turn in the same direction.
One end of the pulling wire 46 is connected to the action part 34 b of the seat back interlocking lever 34, and the other end of the pulling wire 46 is connected to the walk-in interlocking lever 48. Note that the direction of the pulling wire 46 is controlled by a guide member 47 fixed to the side base 13.

  When the seat back 30 is tilted forward (counterclockwise), the linkage member 35 comes into contact with the linkage portion 34a of the seat back linkage lever 34 in the middle of the turning, and the seat back linkage lever 34 is in the same direction. It rotates in the forward tilt direction. When the seat back interlocking lever 34 rotates in the forward tilt direction, the pulling wire 46 connected to the action part 34 b of the seat back interlocking lever 34 is pulled against the urging force of the tension spring 49, and thus the walk-in interlocking lever 48. Rotate clockwise.

  The walk-in interlocking lever 48 is a substantially V-shaped plate as viewed from the side. The other end of the pulling wire 46 and one end of the tension spring 49 are connected to one end, and the other end. The shaft is pivotally supported by a shaft 48 a fixed to the side base 13. The other end of the tension spring 49 is connected to the side base 13 and pulls the pulling wire 46 and urges the walk-in interlocking lever 48 to rotate counterclockwise.

  A linkage cutoff lever 50 is pivotally supported by a shaft 50a fixed to the walk-in interlocking lever 48 so as to be swingable. The walk-in interlocking lever 48 and the linkage cutoff lever 50 are spring-coupled by a torsion spring 51 so that the linkage cutoff lever 50 is urged with respect to the walk-in interlock lever 48 to rotate clockwise. The linkage cutoff lever 50 has a substantially U shape, and a hook portion 50b is formed at one end portion. The hook portion 50 b engages with a linkage pin 52 a fixed to the linkage lever 52, and is linked so that the linkage lever 52 rotates in the same direction as the linkage blocking lever 50. A rotation restricting claw 50 c is formed at the other tip of the linkage cutoff lever 50.

  The linkage lever 52 has a substantially V shape, and is pivotally supported by a shaft 48a so as to be rotatable independently of the walk-in interlocking lever 48 at an approximately middle portion thereof. The linkage lever 52 has a linkage pin 52a fixed to the tip of one arm portion with a shaft 48a interposed therebetween, and a contact portion 52b that contacts the walk-in lock release lever 53 is formed at the tip of the other arm portion.

  The walk-in lock release lever 53 is pivotally supported by a shaft 53a fixed to the side base 13 at a substantially central portion. The abutment portion 52b of the linkage lever 52 abuts on one end of the walk-in lock release lever 53 by turning clockwise, and the walk-in lock release lever 53 turns in the retracted position direction (counterclockwise). Energized. At the tip of the other lever of the walk-in lock release lever 53, an action projection 53c that acts on the seat slide lock mechanism 80 is formed. This action protrusion 53c can act on the seat slide lock mechanism 80 to release the seat slide lock when the walk-in lock release lever 53 rotates in the unlock direction.

  The seat slide lock mechanism 80 normally prevents the seat cushion 20 from sliding back and forth, and when the seat slide lock mechanism 80 is pushed down by the action protrusion 53c of the walk-in lock release lever 53, the seat slide lock is released and the seat cushion 20 is moved back and forth. In a normal use state in which the slide is enabled and the action projection 53c is separated, a lock mechanism that locks the seat slide, for example, a mechanism described in Japanese Patent Application Laid-Open No. 2010-18073 can be used.

  The above is the configuration in the normal use state (seat normal use state). Hereinafter, with reference to FIGS. 1 (B) to 1 (D) and FIGS. 3 to 5, configurations and operations in walk-in, cushion flip-up and seat storage will be described.

"Walk-in"
The walk-in operation will be described with reference to FIG. When the walk-in operation is performed, the user operates a walk-in operation member (not shown) to release the forward tilt lock of the seat back 30 to allow the seat back 30 to tilt forward. Normally, the seat back 30 is tilted forward by the spring biasing means about the seat back shaft 33 as an axis. The forward tilting rotation of the seat back 30 is restricted at the walk-in forward tilt position where the forward tilt restricting protrusion 32 a of the seat back bracket 32 contacts the restricting portion 43 c of the forward lean restricting lever 43.

  In the forward tilt rotation of the seat back 30, before the forward tilt restricting projection 32a comes into contact with the restricting portion 43c, the linkage member 35 comes into contact with the linkage portion 34a of the seat back interlock lever 34, and the seat back interlock lever 34 is moved. Rotate in the same direction (walk-in direction). Then, the seat back interlocking lever 34 pulls the pulling wire 46 connected to the action part 34 b against the urging force of the tension spring 49 to rotate the walk-in interlocking lever 48 in the walk-in direction. When the walk-in interlocking lever 48 rotates in the walk-in direction, the linkage cutoff lever 50 that is spring-connected to the walk-in interlocking lever 48 rotates together, and the linkage cutoff lever 50 walks in via the linkage lever 52. The lock release lever 53 is rotated in the seat slide lock release direction, and the walk-in lock release lever 53 releases the lock of the seat slide lock mechanism 80, thereby enabling the seat slide.

  Attempting to lift the cushion handle 25 in this walk-in state attempts to rotate the forward tilt regulating lever 43 counterclockwise via the cushion lock release lever 24, the seat cushion lock lever 41, and the linkage plate 42. Since the forward tilt restricting protrusion 32a of the seat back bracket 32 is in contact with the restricting portion 43c of the forward lean restricting lever 43 and the counterclockwise rotation of the forward lean restricting lever 43 is restricted, the cushion handle 25 may be pulled up. Can not. That is, in the walk-in state in which the seat back 30 is tilted forward to the intermediate forward tilt angle, the unlocking operation of the cushion lock mechanism by the cushion handle 25 is restricted, and the seat cushion 20 cannot be flipped up. Therefore, there is no possibility that the seat cushion 20 is accidentally lifted up in the walk-in state.

  As described above, when the seat back 30 is pivoted forward, the walk-in lock release lever 53 acts on the seat slide lock mechanism 80 in conjunction with the forward tilt rotation, and the seat slide is released. It becomes possible, and the user can get on and off by sliding the seat forward. Mechanisms (seat back interlocking lever 34, pulling wire 46, walk-in interlocking lever 48, linkage cutoff lever 50, torsion spring 51, linkage lever) from the mechanism interlocking with the forward tilting rotation of the seat back 30 to the walk-in lock release lever 53 52) constitutes the main part of the walk-in mechanism.

  When the seat back 30 rotated forward to the walk-in forward tilt position is raised to the normal state, the pulling wire 46 is pulled by the tension spring 49 via the walk-in interlock lever 48, so that the walk-in interlock lever 48 is Rotating in the clockwise direction (walk-in release direction, locking direction), the linkage cutoff lever 50 spring-connected via the walk-in interlocking lever 48 and the torsion spring 51 rotates together in the locking direction, and further the linkage cutoff The lever 50 rotates the walk-in lock release lever 53 in the seat slide lock direction via the linkage lever 52, and the walk-in lock release lever 53 locks the seat slide lock mechanism 80 to lock the seat. (FIG. 1 (A), FIG. 2).

"Cushion Bounce"
When storing the seat, the seat cushion 20 is first flipped up. The cushion raising operation will be described with reference to FIG. In the cushion flip-up operation, the user grasps and lifts the cushion handle 25 in the normal use state shown in FIG. Then, the cushion lock release lever 24 rotates clockwise, and the pressing portion 24b presses the pressing portion 41c of the seat cushion lock lever 41, so that the seat cushion lock lever 41 resists the urging force of the turnover spring 44. Turn in the walk-in lock release direction. Then, since the hook portion 41b is released from the cushion lock pin 23 and unlocked, the seat cushion 20 rotates about the shaft 22a and jumps up to a substantially vertical state (FIG. 1C). Here, before the hook portion 41b is disengaged from the cushion lock pin 23, the urging direction in which the turn over spring 44 urges the seat cushion lock lever 41 is reversed, and the seat cushion lock lever 41 is It is rotated by being biased in the forward tilt rotation restricting release direction, in other words, in the walk-in cancel direction, and stops in an equilibrium state. In conjunction with this rotation, the forward tilt restricting lever 43 rotates in the forward tilt restricting release direction, the restricting portion 43c moves out of the turning locus of the forward tilt restricting protrusion 32a, and the forward tilt direction of the seat back 30 is reached. Rotation is allowed.

"Store seat"
A retracting operation for causing the seat back 30 to fall into the space occupied by the seat cushion 20 from the raised state of the cushion will be described with reference to FIG. When the seat back 30 is tilted forward from the raised state of the cushion, the linkage member 35 comes into contact with the seat back linkage lever 34 (link portion 34a) and the seat back linkage lever 34 is in the process of rotating the seat back bracket 32 forwardly. Rotate together in the forward tilt direction and pull the pulling wire 46. As the pulling wire 46 is pulled, the walk-in interlocking lever 48 rotates clockwise against the urging force of the tension spring 49. Since the restricting portion 43c of the forward tilt restricting lever 43 is moved out of the rotation trajectory of the forward tilt restricting protrusion 32a, the seat back 30 is not restrained from being forward tilted at the walk-in tilt position, and is further tilted forward. The seat cushion 20 falls into the occupied space (FIG. 5).

  When the walk-in interlocking lever 48 is rotated clockwise by pulling by the pulling wire 46, the linkage cutoff lever 50 is rotated clockwise around the shaft 48a. However, the movement of the linkage blocking lever 50 is restricted by the rotation restricting claw 50 c coming into contact with the restricting pin 41 d of the seat cushion lock lever 41. Accordingly, the linkage cutoff lever 50 rotates (revolves) counterclockwise around the shaft 50a while rotating (revolves) the shaft 50a clockwise around the shaft 48a of the walk-in interlocking lever 48, The hook portion 50b is detached from the linkage pin 52a (FIG. 5). Therefore, the linkage lever 52 and the walk-in lock release lever 53 do not rotate from the normal use state, and the unlocking of the seat slide lock mechanism 80 is cancelled. In the retracted state of the seat back 30, the linkage lever 52 and the walk-in lock release lever 53 are held in a state in which the walk-in is canceled, so the seat slide lock mechanism 80 maintains the locked state, and the seat cushion 20 The slide cannot be moved. As described above, the cushion handle 25, the cushion lock release lever 24, the seat cushion lock lever 41, the linkage cutoff lever 50, and the torsion spring 51 constitute the main part of the cancel mechanism.

  When returning from the seat storage state to the normal seat use state, first, the seat back 30 is raised. Then, the walk-in interlocking lever 48 is rotated in the clockwise direction (walk-in release direction) by the elastic pulling force of the tension spring 49, and the linkage blocking lever 50 is rotated in the locking direction together, and walks through the linkage lever 52. The in-lock release lever 53 is rotated in the seat slide lock direction, the seat slide lock mechanism 80 is locked and the seat slide is locked, and the cushion is raised as shown in FIG. When the seat cushion 20 is lowered to the normal use position from this raised state, the cushion lock pin 23 presses the pressing portion 41c of the seat cushion lock lever 41, and the seat cushion lock lever 41 is resisted against the reverse biasing force of the turnover spring 44. Turn counterclockwise. During the rotation of the seat cushion lock lever 41, the elastic biasing force of the turnover spring 44 is reversed, and the seat cushion lock lever 41 is normally biased counterclockwise so that the hook portion 41 b engages with the cushion lock pin 23. . Accordingly, the forward tilt regulating lever 43 is pivoted in a clockwise direction to rotate and is held at the normal use position in contact with the forward tilt stopper 45 (FIGS. 1A and 2).

According to the first embodiment, when the seat is stored, the seat cushion 20 is lifted by the user holding the cushion handle 25 to cause the seat cushion 20, and the seat slide lock mechanism 80 is unlocked. Since it can be canceled, the seat does not slide forward even if the seat back 30 is tilted forward, and the seat back 30 can be brought down to a horizontal state. As described above, according to the first embodiment, the unlocking of the seat cushion 20 and the storing of the seat can be performed by a series of operations, so that the operation is easy.
Needless to say, the headrest is removed when it cannot be lowered to the horizontal state in a state where the headrest is mounted on the seat back 30.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In addition, in each figure, the same code | symbol is attached | subjected to the member of the same function as 1st Embodiment shown in FIG. 1 thru | or FIG. 5, and detailed description is abbreviate | omitted.

  In the second embodiment, a cushion lock release lever 26 is swingably mounted on the side surface of the rear end portion of the seat cushion 20 via a shaft 26a. A cushion handle 25 is connected to one end of the cushion lock release lever 26 via a shaft 25a. A contact portion 26 b that contacts and presses the lever portion 61 e of the seat cushion lock lever 61 is formed at the other tip of the cushion lock release lever 26. The handle 25 is formed integrally with or separately from the cushion lock release lever 26 and is connected to the cushion lock release lever 26.

  The second embodiment includes a reclining device provided with a walk-in mechanism. As shown in FIG. 11, the reclining mechanism 36 a that is mounted between the seatback bracket 32 and the side base 13 and locks the seatback bracket 32 at a stepwise inclination angle, and the seatback bracket 32 are provided. A spring member 36c that is urged to rotate in the forward tilt direction, an operation lever 36d that releases the lock of the reclining mechanism 36a, and a lock spring 36e that always urges the operation lever 36d to rotate in the lock direction are provided. In this embodiment, when the operation lever 36d is rotated clockwise, the reclining mechanism 36a is unlocked, and the seat back bracket 32 is tilted forward by the spring member 36c.

  The seat cushion lock lever 61 is pivotally supported on a shaft 61 a fixed to the side base 13. The seat cushion lock lever 61 is formed with a hook portion 61b between a pair of fork portions 61c and 61d. A cushion lock pin 27 fixed to the side surface of the rear end portion of the seat cushion 20 is engaged with the hook portion 61b in the normal use state, and the seat cushion 20 is locked. In the seat cushion lock lever 61, a control pin 61f for controlling the rotation of the linkage blocking lever 66 is fixed to a lever portion 61e extending on the opposite side to the hook portion 61b. A forward tilt stopper 62 that restricts the clockwise rotation of the seat cushion lock lever 61 in a normal use state is fixed to the side base 13. When the seat back 30 is pivoted forward during the walk-in operation, the forward tilt restricting protrusion 32a of the seat back bracket 32 abuts on one fork portion 61c of the seat cushion lock lever 61 during the forward tilt rotation, and the seat back 30 Further forward tilting is restricted. In the seat cushion lock lever 61, the other fork portion 61d abuts on the forward tilt stopper 62 to restrict the forward tilt rotation of the seat back 30.

A turnover spring 71 is stretched between the seat cushion lock lever 61 and the side base 13. When the seat is in a normal use state and a walk-in state, the turnover spring 71 urges the seat cushion lock lever 61 to rotate counterclockwise so that the hook portion 61b does not come off the cushion lock pin 27. When the seat is in the cushion flip-up state or the retracted state, the urging direction is reversed, and the seat cushion lock lever 61 is urged to rotate in the clockwise direction in which the hook portion 61b is disengaged from the cushion lock pin 27.
Each member such as the seat cushion lock lever 61 and the turnover spring 71 is mounted on the inner surface of the side base 13.

  One end of the pulling wire 63 is connected to the action part 34 b of the seat back interlocking lever 34, and the other end of the pulling wire 63 is connected to the walk-in interlocking lever 64. The walk-in interlocking lever 64 is a substantially V-shaped plate as viewed from the side. The other end of the pulling wire 63 and one end of the tension spring 65 are connected to one end, and the other end. In this section, the shaft 64a fixed to the side base 13 is pivotally supported. The other end of the tension spring 65 is connected to the side base 13 and pulls the pulling wire 63 and urges the walk-in interlocking lever 64 to rotate counterclockwise.

  A linkage blocking lever 66 is pivotally supported by a shaft 66a fixed to the walk-in interlocking lever 64 so as to be swingable. The walk-in interlocking lever 64 and the linkage blocking lever 66 are spring-coupled by a torsion spring 67 so that the linkage blocking lever 66 is rotated clockwise with respect to the walk-in interlocking lever 64. The linkage blocking lever 66 has a substantially U shape, and a hook portion 66b is formed at one end portion. The hook portion 66 b engages with a linkage pin 68 a fixed to the linkage lever 68 and links the linkage lever 68 so as to rotate in the same direction as the linkage blocking lever 66. A hook portion 66 c is formed at the other tip of the linkage cutoff lever 66.

  The linking lever 68 has a substantially V shape, and is substantially pivotally supported by a shaft 64a at a substantially intermediate portion thereof independently of the walk-in interlocking lever 64. The linkage lever 68 has a linkage pin 68a fixed to the tip of one arm portion with a shaft 64a interposed therebetween, and a contact portion 68b that contacts the walk-in lock release lever 69 is formed at the tip of the other arm portion.

  The walk-in lock release lever 69 is pivotally supported by a shaft 69a fixed to the side base 13 at a substantially central portion. The contact portion 68b of the linkage lever 68 is brought into contact with the tip of one of the walk-in lock release levers 69 by turning clockwise, and the walk-in lock release lever 69 is turned in the retracted position direction (counterclockwise). Energize. An action protrusion 69 c is formed at the tip of the other lever of the walk-in lock release lever 69. The action protrusion 69c can act on the seat slide lock mechanism 80 to release the seat slide lock when the walk-in lock release lever 69 rotates in the lock release direction.

  In the second embodiment described above, the walk-in interlocking lever 64, the tension spring 65, and the linkage blocking lever 66 are mounted on the outer surface of the side base 13, and the linkage pin 68a is formed in an arc-shaped hole formed in the side base 13. The linkage lever 68 and the linkage cutoff lever 66 are connected to each other.

  The above is the configuration in the normal use state (seat normal use state) of the second embodiment. Hereinafter, with reference to FIGS. 6A to 6D and FIGS. 7 to 10, configurations and operations in walk-in, cushion flip-up, and seat storage will be described.

"Walk-in"
The walk-in operation will be described with reference to FIG. In the case of the walk-in operation, when the user operates a walk-in operation member (not shown) to release the forward tilt lock of the seat back 30, the seat back 30 is tilted forward about the seat back shaft 33 by the spring biasing means. Rotate. The forward tilt rotation of the seat back 30 is restricted at the forward lean position where the forward tilt restricting projection 32 a of the seat back bracket 32 contacts the fork portion 61 c of the seat cushion lock lever 61.

  In the forward tilt rotation of the seat back 30, before the forward tilt restricting projection 32a comes into contact with the fork portion 61c, the linkage member 35 comes into contact with the linkage portion 34a of the seat back linkage lever 34, and the seat back linkage lever 34 is moved. Rotate in the same direction (walk-in direction). Then, the seat back interlocking lever 34 pulls the pulling wire 63 connected to the action portion 34b against the urging force of the tension spring 65, and rotates the walk-in interlocking lever 64 in the walk-in direction.

  When the walk-in interlocking lever 64 rotates in the seat slide unlocking direction, the spring-coupled linkage blocking lever 66 rotates together with the walk-in interlocking lever 64, and the linkage blocking lever 66 passes through the linkage lever 68. The walk-in lock release lever 69 is rotated in the walk-in direction, and the walk-in lock release lever 69 releases the lock (seat slide lock) of the seat slide lock mechanism 80. With the above operation, the seat cushion 20 can slide forward.

  In this walk-in state, if the cushion handle 25 is to be pulled up, the seat cushion lock lever 61 tries to rotate counterclockwise via the cushion lock release lever 26, but the fork portion 61 c of the seat cushion lock lever 61. Since the forward tilt restricting projection 32a of the seat back bracket 32 is in contact with the seat cushion lock lever 61 and the counterclockwise rotation of the seat cushion lock lever 61 is restricted, the cushion handle 25 cannot be pulled up. That is, in the walk-in state in which the seat back 30 is tilted forward to the intermediate forward tilt angle, unlocking of the cushion lock mechanism operated by the cushion handle 25 is restricted, and the seat cushion 20 cannot be flipped up. Therefore, there is no possibility that the seat cushion 20 is accidentally lifted up in the walk-in state.

  As described above, when the seat back 30 is pivoted forward, the walk-in lock release lever 69 releases the lock of the seat slide lock mechanism 80 in conjunction with the forward tilt rotation, so that the seat slide becomes possible. The seat can be slid forward.

  When the seatback 30 tilted forward is raised, the pulling wire 63 returns due to the pulling force of the pulling spring 65, so that the walk-in interlocking lever 64 rotates in the walk-in release direction (counterclockwise), and the linkage blocking lever 66, The walk-in lock release lever 69 rotates in the locking direction via the linkage lever 68, the seat slide lock mechanism 80 is locked, and the seat slide is locked.

"Cushion Bounce"
When storing the seat, the seat cushion 20 is first flipped up. The cushion raising operation will be described with reference to FIG. In the cushion flip-up operation, the user pulls up the cushion handle 25 in the normal use state shown in FIGS. 6 (A) and 7. Then, the cushion lock release lever 26 rotates clockwise, and the abutting portion 26b pushes the lever portion 61e of the seat cushion lock lever 61, thereby causing the seat cushion lock lever 61 to walk against the urging force of the turnover spring 71. The seat cushion 20 starts to rotate while the cushion lock pin 27 presses the fork portion 61c of the hook portion 61b. When the seat cushion 20 is further lifted, the cushion lock pin 27 is pulled out from the hook portion 61b, the cushion lock is released, the urging direction of the turnover spring 71 is reversed, and the seat cushion lock lever 61 rotates in the cushion lock release direction. It is urged and held in its cushion lock release position (FIG. 7). This cushion lock release position is also a seat back forward tilt rotation release position where the fork portion 61c is located outside the rotation locus of the forward tilt restriction projection 32a.

"Store seat"
A seat retracting operation that causes the seat back 30 to fall into the space occupied by the seat cushion 20 in the normal use state from the raised state of the cushion will be described with reference to FIGS. 6 (D) and 10. When the seat back 30 is tilted forward from the cushion flip-up state shown in FIGS. 6C and 9, the linkage member 35 is moved to the seat back linkage lever 34 (the linkage portion) in the process in which the seat back bracket 32 pivots forward. 34a), the seat back interlocking lever 34 rotates together in the forward tilt direction, the pulling wire 63 is pulled backward, and the walk-in interlocking lever 64 resists the urging force of the tension spring 65. Rotate direction. Since the fork portions 61c and 61d of the seat cushion lock lever 61 are moved out of the rotation trajectory of the forward tilt restricting projection 32a, the seat back 30 is further forward from the walk-in tilt position in FIGS. 6 (B) and 8. It tilts and falls into the space occupied by the seat cushion 20 (FIG. 6D, FIG. 10), and the seat is stored.

  When the walk-in interlocking lever 64 rotates clockwise by the pulling of the pulling wire 63 in the forward tilt rotation of the seat back 30 described above, the linkage cutoff lever 66 rotates clockwise around the shaft 64a. The movement of the portion 66b is restricted by contacting the control pin 61f of the seat cushion lock lever 61. Accordingly, the linkage cutoff lever 66 rotates counterclockwise around the shaft 66a while turning the shaft 66a clockwise about the shaft 64a, and the hook portion 66c is detached from the linkage pin 68a (FIG. 10). ). That is, the linkage lever 68 and the walk-in lock release lever 69 do not rotate from the normal use state, and the unlocking (walk-in) of the seat slide lock mechanism 80 is cancelled. As described above, when the seat back 30 is stored, the linkage lever 68 and the walk-in lock release lever 69 are held in the walk-in cancel state, so that the seat slide lock mechanism 80 is canceled and the lock release is maintained. The seat cushion 20 cannot slide.

  When returning from the seat storage state to the normal seat use state, first, the seat back 30 is raised. Then, the pulling wire 63 is pulled by the elastic pulling force of the tension spring 65, the walk-in interlocking lever 64 rotates in the walk-in release direction (clockwise), and the walk-in via the interlock blocking lever 66 and the interlocking lever 68 is performed. The lock release lever 69 rotates in the locking direction, and the seat slide locking mechanism 80 performs the locking operation to lock the seat slide, and the cushion is raised as shown in FIGS.

  When the seat cushion 20 is lowered to the normal use position from the raised state of the cushion, the cushion lock pin 27 enters the hook portion 61b of the seat cushion lock lever 61, and the fork portion 61d is pushed so that the seat cushion lock lever 61 is moved to the turnover spring 71. While descending while rotating in the seat lock direction (clockwise) against the urging force, the urging force of the turnover spring 71 reverses in the middle and the seat cushion lock lever 61 is urged to rotate in the cushion lock direction. The locked state is reached (FIGS. 6A and 7).

  As described above, according to the second embodiment, the locking mechanism that locks the seat cushion 20 in the normal use position and the mechanism that restricts the seat back 30 to be tilted forward at the walk-in forward tilt position are combined with the single seat cushion lock lever 61. Therefore, the number of parts can be smaller than in the first embodiment.

  In the first and second embodiments, the traction wires 46 and 63 are used as members for linking the seat back interlocking lever 34 and the walk-in interlocking levers 48 and 64 of the seat back 30. If there is no interference between the connecting parts, a rod can be used instead of a wire.

10 Seat support rail (seat slide mechanism)
11 Lower rail 12 Upper rail 13 Side base (base member)
20 Seat cushion 22 Link plate 23 Cushion lock pin (cushion lock member)
24 Cushion lock release lever 24a Shaft 24b Press part 25 Cushion handle (operation member)
26 Cushion lock release lever 26a Shaft 26b Contact part 27 Cushion lock pin (cushion lock member)
30 seat back 32 seat back bracket 32a forward tilt restricting projection 33 seat back shaft 34 seat back interlocking lever 34a linkage portion 34b action portion 35 linkage member 41 seat cushion lock lever 41b hook portion 41c pressing portion 41d regulating pin 42 linkage plates 42a, 42b Connecting shaft 43 Forward tilt restricting lever 43c Restricting portion 44 Turn over spring 45 Forward tilting stopper 46 Pulling wire 47 Wire guide 48 Walk-in interlocking lever 48a Shaft 49 Tension spring 50 Linkage cutoff lever 50a Shaft 50b Hook 51 Torsion spring 52 Linking lever 52a Linking pin 52b Contact portion 53 Walk-in lock release lever 61 Seat cushion lock lever 61a Shaft 61b Hook portion 61c 61d Fork portion 61e Lever portion 61f Control pin 62 Stopper 63 Pull-in wire 64 Walk-in interlocking lever 65 Tension spring 66 Linkage cutoff lever 67 Torsion spring 68 Linkage lever 69 Lock release lever 71 Turnover spring 80 Seat slide lock mechanism

Claims (8)

A seat slide mechanism that slidably supports the seat, a seat slide lock mechanism that locks the slide of the seat at a use position, and a forward tilt rotation when the seat back of the seat is tilted forward to an intermediate forward tilt angle. And a walk-in mechanism that releases the lock of the seat slide lock mechanism in conjunction with the seat seat, wherein the seat back can be pivoted forward most after the seat cushion of the seat is flipped forward,
A cushion lock mechanism for locking the seat cushion in a normal use position;
A forward tilt regulating mechanism for regulating the forward tilt rotation of the seat back at the intermediate forward tilt angle;
A cancel mechanism for canceling unlocking of the seat slide lock mechanism;
The seat includes: an operation member that unlocks the cushion lock mechanism, and moves the forward tilt restriction mechanism to a restriction release state and a cancel mechanism to a cancel state. 2. The seat according to claim 1, wherein the forward tilt restricting mechanism restricts unlocking of the cushion lock mechanism by the operation member when restricting the forward tilt rotation of the seat back at the intermediate forward tilt angle. . The seat according to claim 1 or 2, wherein the operation member is provided on the seat cushion side, and the cushion lock mechanism, the forward tilt restricting mechanism, and the cancel mechanism are provided on a side that supports the seat cushion. Seat seat. 4. The seat according to claim 1, wherein an operation direction of the operation member is a direction in which the seat cushion is flipped up. 5. 5. The seat according to claim 1, wherein the seat cushion is pivotally supported by the seat slide mechanism so that the seat cushion can be flipped up forward, and the operation member is a rear end of the seat cushion. Seat seat installed on the side. The seat according to any one of claims 1 to 5, wherein the seat cushion engages with the seat cushion when the seat cushion is in a normal use position, and interlocks with a seat cushion jumping operation by the operation member. A seat seat comprising: a seat cushion lock lever that is disengaged from the cushion; and a forward tilt restriction lever that releases the forward tilt rotation restriction of the seat back in conjunction with the rotation of the seat cushion lock lever. The seat according to any one of claims 1 to 5, wherein the seat seat is disengaged from the seat cushion in conjunction with a seat cushion flip-up operation by the operation member, and the forward tilt rotation restriction of the seat back is released. A seat with a seat cushion lock lever. The seat according to claim 6 or 7, further comprising a turnover spring for turning and urging the seat cushion lock lever, the turnover spring being in a direction in which the seat cushion lock lever is engaged with the seat cushion. A seat that is pivotally biased and reverses the pivotal biasing direction when the seat cushion lock lever is pivoted in a forward tilt pivot restriction release direction.

Images