JP2838636B2 - Walk-in adjuster mechanism for seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walk-in mechanism mainly mounted on a front seat of a two-door vehicle or the like.

[0002]

2. Description of the Related Art A walk-in mechanism is provided on a front seat of a two-door vehicle in consideration of a passenger's getting on and off a rear seat. This walk-in mechanism is provided with a lock release mechanism that sets the seat slide mechanism to a free state in a certain section.

[0003] In this mechanism, a plate piece fixed to an upper rail constituting a slide mechanism is provided with a lock release lever interlocking with a lock mechanism for holding a seat at an arbitrary position in the front-rear direction by a lock lever and a locking plate. The section is engaged and disengaged according to the sliding position of the seat to form a section in which the lock mechanism operates and a section in which the lock mechanism does not operate.

[0004] The plate piece is locked by urging the lock release lever, and when the seat is moved, a projection is formed on a locking plate corresponding to the passage of the plate piece, and the projection is used to push the plate piece upward. Pressing releases the engagement between the lock release lever and the plate piece. That is, the seat is free to slide until the projection engages with the plate piece. The lock release lever is connected to a walk-in cable that is connected to a walk-in operation unit that pivots the lock mechanism in the release direction and tilts the seat back of the seat forward, and operates the operation unit to release the lock release lever. Is rotated, the lock mechanism is released, and the seat back falls down, and the seat slides forward by a spring that biases the seat forward.

[0005]

In the walk-in mechanism described above, the slide of the seat is restricted by locking the lock lever to the locking plate.
Since the locking plate has a structure protruding from the upper rail in the width direction of the vehicle, a space in the vehicle width direction is required. In addition, since the plate piece is pushed upward by the protrusion formed on the locking plate to release the engagement between the lock release lever and the plate piece, the release operation can be performed by increasing the protrusion amount of the protrusion. On the other hand, it is reliable, but on the other hand, there is a problem that the resistance at the time of sliding increases and the locking plate becomes large.

[0006]

SUMMARY OF THE INVENTION Therefore, a walk-in adjuster mechanism for a seat according to the present invention comprises a slide rail for slidably supporting a seat in a front-rear direction from a first movement range to a second movement range; A slide lock mechanism for holding a seat at an arbitrary position in the front-rear direction by engagement of a lock lever and a locking plate, a lock release member connected to the slide lock mechanism for releasing the mechanism, and a lock release member. A plate piece for restricting the operation thereof, a lever member rotatably supported by the slide rail and abutting on the plate piece, and a locking plate formed on the locking plate. The engagement between the plate piece and the unlocking member is released, and the lever member is swung in the direction in which the plate piece and the unlocking member are engaged in the second movement range. And a spring for urging the seat forward, bending one end of the lever member toward the slide rail, and sliding the locking plate more than a side extension line of the slide rail. It was located at the center of the rail.

[0007]

The lock release member is rotatably supported by a slide rail that slidably supports the seat, and releases a slide lock mechanism that holds the seat at an arbitrary position by engagement of a lock lever and a locking plate. A plate piece that regulates movement,
One end of a lever member that comes into contact with a guide surface formed on the locking plate is bent toward the slide rail, and the locking plate is positioned closer to the center of the rail than a side extension of the slide rail. With this arrangement, the contact portion between the guide surface and the lever member is positioned at the center side from the side line extension of the slide rail. Further, as the seat slides, the lever member is swung by the guide surface, and the plate piece abutting on the lever member is displaced.

[0008]

In FIG. 2, reference numeral 1 designates a front seat of a vehicle. When an operation lever (not shown) is operated, the seat back 2 is tilted forward by an arrow A, and the seat cushion 3 is moved by an arrow. A walk-in adjuster mechanism 4 (hereinafter, referred to as “walk-in mechanism 4”) that moves in a forward direction indicated by F is provided.

The walk-in mechanism 4 includes a lower rail 5 and an upper rail 6 for sliding the seat 1 in the front-rear direction indicated by an arrow FR, and a slide for locking the slide rail and holding the seat 1 at an arbitrary position. A lock mechanism 7, an open lever 8 connected to the slide lock mechanism 7 to release the lock mechanism, a memory plate 9 as a plate piece engaging with the open lever 8 and restricting the operation of the lever 8; A kick plate 10 as a lever member rotatably supported by the upper rail 6 and abutting on the memory plate 9; a guide surface 11 for swinging the open lever 8 in a direction for disengaging the memory plate 9 and the open lever 8; And a spring 12 for urging the seat 1 in the forward direction F.

More specifically, the lower rail 5
Is fixed to a floor (not shown), and is formed so as to extend together with the upper rail 6 in the front-rear direction FR of the vehicle. A roller 13 made of a hard sphere is interposed between the lower rail 5 and the upper rail 6, and the lower rail 5 slidably supports the upper rail 6 (see FIG. 1). A bracket 14, which forms part of the frame of the seat cushion 3, is fixed to the upper rail 6.

As shown in FIGS. 1 and 3, the slide lock mechanism 7 is integrated with the upper rail 6 via a lock plate 15 as a locking plate fastened and fixed to a lower portion of the lower rail 5 and a bracket (not shown). Base end 17 on rod 16
The lock lever 17 includes a lock lever 17 to which the b is fixed, and a torsion spring 18 that is wound around the rod 16 and urges the lower end 17 a of the lock lever 17 toward the lock plate 15. The direction in which the lock lever 17 is urged is referred to as a lock direction and is indicated by an arrow C, and a direction opposite to the arrow C direction is indicated by an arrow D as a lock release direction.

The lock plate 15 extends in the front-rear direction FR, and has a U-shape such that one side edge 15a is located closer to the center of the upper rail 6 than the extension line a of the side surface 6a of the rail 6. It is formed in a bent shape. One side edge 15a has a plurality of openings 1 in the longitudinal direction.
5b are provided at equal intervals. In this opening 15b,
When the lock lever 17 rotates in the locking direction, the lower end 17a of the lever is locked.

The open lever 8 is fixed on a rod 16 located on the front F side of the lock lever 17. At the upper part of the open lever 8, a locking portion 8a is formed which engages with a hole 9a formed in the memory plate 9. A walk-in cable 19 (hereinafter, referred to as “cable 19”) connected to a link lining mechanism (not shown) of the seat back 2 is fixed to a pin 8b formed below the open lever 8.

The memory plate 9 in which the hole 9a is formed,
It is composed of a leaf spring 9A fixed to the bracket 14 and a base material 9B fixed so as to overlap the back side thereof,
It is urged downward from the leaf spring 9A.

The hole 9a is a long hole extending in the width direction of the vehicle as indicated by an arrow W, and when the lock lever 17 is located at an open position where the lower end 17a of the lock lever is disengaged from the opening 15b of the lock plate. In addition, it is formed at a position where it can be locked with the locking portion 8a. The open position of the lock lever 17 is the position of the lock lever shown in FIG. 5, and the lock position of the lever 17 is the position of the lock lever shown in FIG.

The kick plate 10 has its base end 10a rotatably supported by pins 20 on the side surface 6a of the upper rail 6 located below the memory plate 9, and has a free end 10a.
b is formed in a substantially rectangular shape so as to abut on the back surface of the memory plate 9. As shown in FIG. 4, a protruding portion 10c is formed to protrude downward near the curved portion between the base end 10a and the free end 10b. The protrusion 10c is bent inward (to the left in FIG. 3), and
Is in contact with the upper end surface of one side edge 15a of the lock plate located below the lock plate. The kick plate 10 has a distance E1 from the pin 20 which is the center of its swing to the protrusion 10c, and a distance E2 from the pin 20 to the free end 10b.
The guide surface 11 formed so as to satisfy E1 <E2
The lock plate 15 is formed of a rearward rising inclined surface 11a formed at the front end of the lock plate 15 and a flat surface 11b continuous with the inclined surface. When the protrusion 10c of the kick plate 10 is located on the inclined surface 11a, the memory plate 9 is placed at a position where the hole 9a and the engaging portion 8a are engaged, and the flat surface 11b is projected on the same surface. When the portion 10c is located, the height is set to a position where the memory plate 9 is placed at a position where the engagement between the hole 9a and the locking portion 8a is released.

The memory plate 9 and the open lever 8
Is held in the engaged state is referred to as a first movement range of the seat 1, and a section in which the engagement state between the memory plate 9 and the open lever 8 is released is referred to as a second movement range of the seat 1.

The rear end 12a of the spring 12 is locked by an angle member 21 fastened to the bracket 14, and the front end 12b is locked by a bracket 22 fixed to the front end 5a of the lower rail 5 (see FIG. 2). ).

The relining mechanism (not shown) connected to the cable 19 is a well-known mechanism for swingably supporting the seat back 2, and is operated by operating an operation lever (not shown) to tilt the seat back 2 in the direction of arrow A. The cable 19 is pulled in a direction to rotate the lock lever 17 in the release direction. A slide lever (not shown) that enables the seat 1 to slide alone by releasing the lock lever 17 is connected to the rod 16.

The operation of the walk-in mechanism 4 configured as described above will be described. The seat 1 is usually located within the first movement range. At this time, the kick plate 10
4, the memory plate 9 is pushed up as shown in FIG. 3, and the engagement between the locking portion 8a and the hole 9a is released. Therefore, the lock lever 17 is urged in the locking direction by the action of the torsion spring 18 and its lower end 1
7a is engaged with the opening 15b, and the seat 1 is locked.

When the seat 1 is operated in the front-rear direction from the locked state, the slide lever (not shown) connected to the rod 16 is operated to rotate the rod 16 in the direction of arrow D to lock the lock lever 17 and the lock plate 15. Release the engagement with. Then, the seat 1 is slid in a desired direction, and when the position is determined, if the operation of the slide lever is stopped, the rod 16 is rotated in the locking direction by the spring 18 and the seat 1 is locked in the desired position. .

On the other hand, when the seek back 2 is tilted in the direction of arrow A by operating the lever of the reclining mechanism (not shown),
In conjunction with this operation, the cable 19 is pulled rightward in FIG. Then, the open lever 8 is moved to the rod 16
5, the lock lever 17 and the lock plate 15 are unlocked, and the upper rail 6 becomes free, as shown in FIG.
To slide forward. Therefore, the seat 1 located in the first movement range moves toward the second movement range.

With the sliding of the upper rail 6, the kick plate 10 also slides from the flat surface 11b to the inclined surface 11a, and the plate 10 moves from the solid line position in FIG. To move downward. Due to the displacement of the kick plate 10,
The memory plate 9 in contact with the plate is urged downward, and the locking portion 8a is engaged with the hole 9a as shown in FIG.

To return the seat 1 to the first movement range, which is the initial position, from this state, first, the seat 1 is pushed in the direction R against the urging force of the spring 12. Then
The upper rail 6 slides in the same direction and the kick plate 1
0 moves along the inclined surface 11a, and displaces the memory plate 9 by pushing up the memory plate 9 from the two-dot chain line position to the solid line position by the other end 10b.

When the projection 10c of the kick plate 10 reaches the flat surface 11b from the inclined surface 11a, the locking portion 8a and the hole 9c
The open lever 8 is released in the locking direction by the torsion spring 18 together with the rod 16.

Therefore, as soon as the projection 10c moves from the inclined surface 11a to the flat surface 11b, the lower end 17 of the lock lever 17
a engages with the opening 17b to prevent the movement of the upper rail 6, and the seat 1 is held in the first movement range.

In addition, the rotation of the open lever 8 in the locking direction at this time causes the cable 19 to move as shown in FIG.
Since the seat back 2 is pulled to the left, the seat back 2 that has fallen in the direction of arrow A via the reclining mechanism (not shown) stands up in the direction of arrow B.

As described above, one side edge 15a of the lock plate 15 is provided closer to the center of the rail than the extension line a of the side surface 6a of the upper rail 6, and the projection 10c of the kick plate 10 is directed toward the center of the rail. Since it was bent, protrusion 1
The contact portion of the guide portion 11 formed on the upper end surface of the one side edge 15a with 0c can be located below the slide rail, and the spread of the walk-in mechanism 1 in the vehicle width direction can be suppressed.

Also, the distance E1 from the center of the pin 20 to the projection 10c abutting on the guide surface 11 and the distance E2 from the other end 10b abutting on the memory plate are set so that E1 <E2. As shown in FIG.
When the displacement amount L1 of the free end 10b with respect to the displacement amount L of 0c can be increased and the same movement amount of the memory plate 9 as that of the related art can be obtained, the difference between the inclined surface 11a and the flat surface 11b can be reduced, and the lock indicated by the arrow U is locked. The width of the plate 15 in the height direction can be reduced. Further, since the kick plate 10 is rotated and displaced about the pin 20 as the seat 1 moves, the kick plate 10 can be displaced smoothly with little resistance to the movement.

[0030]

According to the present invention, the spread of the walk-in adjuster mechanism in the width direction and the height direction can be suppressed, so that the size of the mechanism can be reduced. Also,
Since the lever member can rotate smoothly, the sliding resistance during the operation of the mechanism is reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a walk-in adjuster mechanism showing one embodiment of the present invention.

FIG. 2 is a side view showing a schematic configuration of a seat to which the present invention is applied.

FIG. 3 is a sectional view showing a locked state of the walk-in adjuster mechanism.

FIG. 4 is a side view showing a relationship between a plate piece and a lever member accompanying movement of a seat.

FIG. 5 is a cross-sectional view showing an unlocked state of the walk-in adjuster mechanism.

[Explanation of symbols]

Reference Signs List 1 seat 4 walk-in adjuster mechanism 5, 6 slide rail 7 slide lock mechanism 8 unlocking member (open lever) 9 plate piece (memory plate) 10 lever member (kick plate) 10c one end of lever member 11 guide surface 12 spring 15 Stop plate (lock plate) 17 Lock lever a Side extension line F, R Front and rear direction

Continuing on the front page (72) Inventor Yuji Kuroda 2 Kirihara-cho, Fujisawa-shi, Kanagawa Prefecture, Shiroki Corporation (72) Inventor Masato Horie 2, Kirihara-cho, Fujisawa-shi, Kanagawa Prefecture, Shiroki Corporation (56 ) References JP 2-49068 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) B60N 2/06 B60N 2/20

Claims (1)

(57) [Claims] 1. A slide rail for supporting a seat slidably in the front-rear direction, a slide lock mechanism for holding the seat at an arbitrary position in the front-rear direction by engagement of a lock lever and a locking plate, and the slide. An unlocking member that is connected to the locking mechanism to release the mechanism, a plate piece that engages with the unlocking member and regulates the operation thereof, and is rotatably supported by the slide rail and formed on the locking plate. A lever member that abuts the guide surface and the plate piece to be engaged and disengages the plate piece and the unlocking member in conjunction with movement of the seat, and a spring that biases the seat forward. One end of the lever member is bent toward the slide rail, and the locking plate is disposed on a center side of the slide rail with respect to a side extension line of the slide rail. Seat of a walk-in adjuster mechanism.